Update to version 0.6.4

* [NOD-1271] Move version package to the top level

* [NOD-1271] Fix imports

.gitignore

@@ -2,7 +2,7 @@
 *~
 
 # Databases
-btcd.db
+kaspad.db
 *-shm
 *-wal
 

CHANGES

@@ -1,955 +0,0 @@
-============================================================================
-User visible changes for btcd
-  A full-node bitcoin implementation written in Go
-============================================================================
-
-Changes in 0.12.0 (Fri Nov 20 2015)
-  - Protocol and network related changes:
-    - Add a new checkpoint at block height 382320 (#555)
-    - Implement BIP0065 which includes support for version 4 blocks, a new
-      consensus opcode (OP_CHECKLOCKTIMEVERIFY) that enforces transaction
-      lock times, and a double-threshold switchover mechanism (#535, #459,
-      #455)
-    - Implement BIP0111 which provides a new bloom filter service flag and
-      hence provides support for protocol version 70011 (#499)
-    - Add a new parameter --nopeerbloomfilters to allow disabling bloom
-      filter support (#499)
-    - Reject non-canonically encoded variable length integers (#507)
-    - Add mainnet peer discovery DNS seed (seed.bitcoin.jonasschnelli.ch)
-      (#496)
-    - Correct reconnect handling for persistent peers (#463, #464)
-    - Ignore requests for block headers if not fully synced (#444)
-    - Add CLI support for specifying the zone id on IPv6 addresses (#538)
-    - Fix a couple of issues where the initial block sync could stall (#518,
-      #229, #486)
-    - Fix an issue which prevented the --onion option from working as
-      intended (#446)
-  - Transaction relay (memory pool) changes:
-    - Require transactions to only include signatures encoded with the
-    canonical 'low-s' encoding (#512)
-    - Add a new parameter --minrelaytxfee to allow the minimum transaction
-      fee in BTC/kB to be overridden (#520)
-    - Retain memory pool transactions when they redeem another one that is
-      removed when a block is accepted (#539)
-    - Do not send reject messages for a transaction if it is valid but
-      causes an orphan transaction which depends on it to be determined
-      as invalid (#546)
-    - Refrain from attempting to add orphans to the memory pool multiple
-      times when the transaction they redeem is added (#551)
-    - Modify minimum transaction fee calculations to scale based on bytes
-      instead of full kilobyte boundaries (#521, #537)
-  - Implement signature cache:
-    - Provides a limited memory cache of validated signatures which is a
-      huge optimization when verifying blocks for transactions that are
-      already in the memory pool (#506)
-    - Add a new parameter '--sigcachemaxsize' which allows the size of the
-      new cache to be manually changed if desired (#506)
-  - Mining support changes:
-    - Notify getblocktemplate long polling clients when a block is pushed
-      via submitblock (#488)
-    - Speed up getblocktemplate by making use of the new signature cache
-      (#506)
-  - RPC changes:
-    - Implement getmempoolinfo command (#453)
-    - Implement getblockheader command (#461)
-    - Modify createrawtransaction command to accept a new optional parameter
-      'locktime' (#529)
-    - Modify listunspent result to include the 'spendable' field (#440)
-    - Modify getinfo command to include 'errors' field (#511)
-    - Add timestamps to blockconnected and blockdisconnected notifications
-      (#450)
-    - Several modifications to searchrawtranscations command:
-      - Accept a new optional parameter 'vinextra' which causes the results
-        to include information about the outputs referenced by a transaction's
-        inputs (#485, #487)
-      - Skip entries in the mempool too (#495)
-      - Accept a new optional parameter 'reverse' to return the results in
-        reverse order (most recent to oldest) (#497)
-      - Accept a new optional parameter 'filteraddrs' which causes the
-        results to only include inputs and outputs which involve the
-        provided addresses (#516)
-    - Change the notification order to notify clients about mined
-      transactions (recvtx, redeemingtx) before the blockconnected
-      notification (#449)
-    - Update verifymessage RPC to use the standard algorithm so it is
-      compatible with other implementations (#515)
-    - Improve ping statistics by pinging on an interval (#517)
-  - Websocket changes:
-    - Implement session command which returns a per-session unique id (#500,
-      #503)
-  - btcctl utility changes:
-    - Add getmempoolinfo command (#453)
-    - Add getblockheader command (#461)
-    - Add getwalletinfo command (#471)
-  - Notable developer-related package changes:
-    - Introduce a new peer package which acts a common base for creating and
-      concurrently managing bitcoin network peers (#445)
-    - Various cleanup of the new peer package (#528, #531, #524, #534,
-      #549)
-    - Blocks heights now consistently use int32 everywhere (#481)
-    - The BlockHeader type in the wire package now provides the BtcDecode
-      and BtcEncode methods (#467)
-    - Update wire package to recognize BIP0064 (getutxo) service bit (#489)
-    - Export LockTimeThreshold constant from txscript package (#454)
-    - Export MaxDataCarrierSize constant from txscript package (#466)
-    - Provide new IsUnspendable function from the txscript package (#478)
-    - Export variable length string functions from the wire package (#514)
-    - Export DNS Seeds for each network from the chaincfg package (#544)
-    - Preliminary work towards separating the memory pool into a separate
-      package (#525, #548)
-  - Misc changes:
-    - Various documentation updates (#442, #462, #465, #460, #470, #473,
-      #505, #530, #545)
-    - Add installation instructions for gentoo (#542)
-    - Ensure an error is shown if OS limits can't be set at startup (#498)
-    - Tighten the standardness checks for multisig scripts (#526)
-    - Test coverage improvement (#468, #494, #527, #543, #550)
-    - Several optimizations (#457, #474, #475, #476, #508, #509)
-    - Minor code cleanup and refactoring (#472, #479, #482, #519, #540)
-  - Contributors (alphabetical order):
-    - Ben Echols
-    - Bruno Clermont
-    - danda
-    - Daniel Krawisz
-    - Dario Nieuwenhuis
-    - Dave Collins
-    - David Hill
-    - Javed Khan
-    - Jonathan Gillham
-    - Joseph Becher
-    - Josh Rickmar
-    - Justus Ranvier
-    - Mawuli Adzoe
-    - Olaoluwa Osuntokun
-    - Rune T. Aune
-
-Changes in 0.11.1 (Wed May 27 2015)
-  - Protocol and network related changes:
-    - Use correct sub-command in reject message for rejected transactions
-      (#436, #437)
-    - Add a new parameter --torisolation which forces new circuits for each
-      connection when using tor (#430)
-  - Transaction relay (memory pool) changes:
-    - Reduce the default number max number of allowed orphan transactions
-      to 1000 (#419)
-    - Add a new parameter --maxorphantx which allows the maximum number of
-      orphan transactions stored in the mempool to be specified (#419)
-  - RPC changes:
-    - Modify listtransactions result to include the 'involveswatchonly' and
-      'vout' fields (#427)
-    - Update getrawtransaction result to omit the 'confirmations' field
-      when it is 0 (#420, #422)
-    - Update signrawtransaction result to include errors (#423)
-  - btcctl utility changes:
-    - Add gettxoutproof command (#428)
-    - Add verifytxoutproof command (#428)
-  - Notable developer-related package changes:
-    - The btcec package now provides the ability to perform ECDH
-      encryption and decryption (#375)
-    - The block and header validation in the blockchain package has been
-      split to help pave the way toward concurrent downloads (#386)
-  - Misc changes:
-    - Minor peer optimization (#433)
-  - Contributors (alphabetical order):
-    - Dave Collins
-    - David Hill
-    - Federico Bond
-    - Ishbir Singh
-    - Josh Rickmar
-
-Changes in 0.11.0 (Wed May 06 2015)
-  - Protocol and network related changes:
-    - **IMPORTANT: Update is required due to the following point**
-    - Correct a few corner cases in script handling which could result in
-      forking from the network on non-standard transactions (#425)
-    - Add a new checkpoint at block height 352940 (#418)
-    - Optimized script execution (#395, #400, #404, #409)
-    - Fix a case that could lead stalled syncs (#138, #296)
-  - Network address manager changes:
-    - Implement eclipse attack countermeasures as proposed in
-      http://cs-people.bu.edu/heilman/eclipse (#370, #373)
-  - Optional address indexing changes:
-    - Fix an issue where a reorg could cause an orderly shutdown when the
-      address index is active (#340, #357)
-  - Transaction relay (memory pool) changes:
-    - Increase maximum allowed space for nulldata transactions to 80 bytes
-      (#331)
-    - Implement support for the following rules specified by BIP0062:
-      - The S value in ECDSA signature must be at most half the curve order
-        (rule 5) (#349)
-      - Script execution must result in a single non-zero value on the stack
-        (rule 6) (#347)
-      - NOTE: All 7 rules of BIP0062 are now implemented
-    - Use network adjusted time in finalized transaction checks to improve
-      consistency across nodes (#332)
-    - Process orphan transactions on acceptance of new transactions (#345)
-  - RPC changes:
-    - Add support for a limited RPC user which is not allowed admin level
-      operations on the server (#363)
-    - Implement node command for more unified control over connected peers
-      (#79, #341)
-    - Implement generate command for regtest/simnet to support
-      deterministically mining a specified number of blocks (#362, #407)
-    - Update searchrawtransactions to return the matching transactions in
-      order (#354)
-    - Correct an issue with searchrawtransactions where it could return
-      duplicates (#346, #354)
-    - Increase precision of 'difficulty' field in getblock result to 8
-      (#414, #415)
-    - Omit 'nextblockhash' field from getblock result when it is empty
-      (#416, #417)
-    - Add 'id' and 'timeoffset' fields to getpeerinfo result (#335)
-  - Websocket changes:
-    - Implement new commands stopnotifyspent, stopnotifyreceived,
-      stopnotifyblocks, and stopnotifynewtransactions to allow clients to
-      cancel notification registrations (#122, #342)
-  - btcctl utility changes:
-    - A single dash can now be used as an argument to cause that argument to
-      be read from stdin (#348)
-    - Add generate command
-  - Notable developer-related package changes:
-    - The new version 2 btcjson package has now replaced the deprecated
-      version 1 package (#368)
-    - The btcec package now performs all signing using RFC6979 deterministic
-      signatures (#358, #360)
-    - The txscript package has been significantly cleaned up and had a few
-      API changes (#387, #388, #389, #390, #391, #392, #393, #395, #396,
-      #400, #403, #404, #405, #406, #408, #409, #410, #412)
-    - A new PkScriptLocs function has been added to the wire package MsgTx
-      type which provides callers that deal with scripts optimization
-      opportunities (#343)
-  - Misc changes:
-    - Minor wire hashing optimizations (#366, #367)
-    - Other minor internal optimizations
-  - Contributors (alphabetical order):
-    - Alex Akselrod
-    - Arne Brutschy
-    - Chris Jepson
-    - Daniel Krawisz
-    - Dave Collins
-    - David Hill
-    - Jimmy Song
-    - Jonas Nick
-    - Josh Rickmar
-    - Olaoluwa Osuntokun
-    - Oleg Andreev
-
-Changes in 0.10.0 (Sun Mar 01 2015)
-  - Protocol and network related changes:
-    - Add a new checkpoint at block height 343185
-    - Implement BIP066 which includes support for version 3 blocks, a new
-      consensus rule which prevents non-DER encoded signatures, and a
-      double-threshold switchover mechanism
-    - Rather than announcing all known addresses on getaddr requests which
-      can possibly result in multiple messages, randomize the results and
-      limit them to the max allowed by a single message (1000 addresses)
-    - Add more reserved IP spaces to the address manager
-  - Transaction relay (memory pool) changes:
-    - Make transactions which contain reserved opcodes nonstandard
-    - No longer accept or relay free and low-fee transactions that have
-      insufficient priority to be mined in the next block
-    - Implement support for the following rules specified by BIP0062:
-      - ECDSA signature must use strict DER encoding (rule 1)
-      - The signature script must only contain push operations (rule 2)
-      - All push operations must use the smallest possible encoding (rule 3)
-      - All stack values interpreted as a number must be encoding using the
-        shortest possible form (rule 4)
-      - NOTE: Rule 1 was already enforced, however the entire script now
-        evaluates to false rather than only the signature verification as
-        required by BIP0062
-    - Allow transactions with nulldata transaction outputs to be treated as
-      standard
-  - Mining support changes:
-    - Modify the getblocktemplate RPC to generate and return block templates
-      for version 3 blocks which are compatible with BIP0066
-    - Allow getblocktemplate to serve blocks when the current time is
-      less than the minimum allowed time for a generated block template
-      (https://github.com/btcsuite/btcd/issues/209)
-  - Crypto changes:
-    - Optimize scalar multiplication by the base point by using a
-      pre-computed table which results in approximately a 35% speedup
-     (https://github.com/btcsuite/btcec/issues/2)
-    - Optimize general scalar multiplication by using the secp256k1
-      endomorphism which results in approximately a 17-20% speedup
-     (https://github.com/btcsuite/btcec/issues/1)
-    - Optimize general scalar multiplication by using non-adjacent form
-      which results in approximately an additional 8% speedup
-     (https://github.com/btcsuite/btcec/issues/3)
-  - Implement optional address indexing:
-    - Add a new parameter --addrindex which will enable the creation of an
-      address index which can be queried to determine all transactions which
-      involve a given address
-      (https://github.com/btcsuite/btcd/issues/190)
-    - Add a new logging subsystem for address index related operations
-    - Support new searchrawtransactions RPC
-      (https://github.com/btcsuite/btcd/issues/185)
-  - RPC changes:
-    - Require TLS version 1.2 as the minimum version for all TLS connections
-    - Provide support for disabling TLS when only listening on localhost
-      (https://github.com/btcsuite/btcd/pull/192)
-    - Modify help output for all commands to provide much more consistent
-      and detailed information
-    - Correct case in getrawtransaction which would refuse to serve certain
-      transactions with invalid scripts
-      (https://github.com/btcsuite/btcd/issues/210)
-    - Correct error handling in the getrawtransaction RPC which could lead
-      to a crash in rare cases
-      (https://github.com/btcsuite/btcd/issues/196)
-    - Update getinfo RPC to include the appropriate 'timeoffset' calculated
-      from the median network time
-    - Modify listreceivedbyaddress result type to include txids field so it
-      is compatible
-    - Add 'iswatchonly' field to validateaddress result
-    - Add 'startingpriority' and 'currentpriority' fields to getrawmempool
-      (https://github.com/btcsuite/btcd/issues/178)
-    - Don't omit the 'confirmations' field from getrawtransaction when it is
-      zero
-  - Websocket changes:
-    - Modify the behavior of the rescan command to automatically register
-      for notifications about transactions paying to rescanned addresses
-      or spending outputs from the final rescan utxo set when the rescan
-      is through the best block in the chain
-  - btcctl utility changes:
-    - Make the list of commands available via the -l option rather than
-      dumping the entire list on usage errors
-    - Alphabetize and categorize the list of commands by chain and wallet
-    - Make the help option only show the help options instead of also
-      dumping all of the commands
-    - Make the usage syntax much more consistent and correct a few cases of
-      misnamed fields
-      (https://github.com/btcsuite/btcd/issues/305)
-    - Improve usage errors to show the specific parameter number, reason,
-      and error code
-    - Only show the usage for specific command is shown when a valid command
-      is provided with invalid parameters
-    - Add support for a SOCK5 proxy
-    - Modify output for integer fields (such as timestamps) to display
-      normally instead in scientific notation
-    - Add invalidateblock command
-    - Add reconsiderblock command
-    - Add createnewaccount command
-    - Add renameaccount command
-    - Add searchrawtransactions command
-    - Add importaddress command
-    - Add importpubkey command
-  - showblock utility changes:
-    - Remove utility in favor of the RPC getblock method
-  - Notable developer-related package changes:
-    - Many of the core packages have been relocated into the btcd repository
-      (https://github.com/btcsuite/btcd/issues/214)
-    - A new version of the btcjson package that has been completely
-      redesigned from the ground up based based upon how the project has
-      evolved and lessons learned while using it since it was first written
-      is now available in the btcjson/v2/btcjson directory
-      - This will ultimately replace the current version so anyone making
-        use of this package will need to update their code accordingly
-    - The btcec package now provides better facilities for working directly
-      with its public and private keys without having to mix elements from
-      the ecdsa package
-    - Update the script builder to ensure all rules specified by BIP0062 are
-      adhered to when creating scripts
-    - The blockchain package now provides a MedianTimeSource interface and
-      concrete implementation for providing time samples from remote peers
-      and using that data to calculate an offset against the local time
-  - Misc changes:
-    - Fix a slow memory leak due to tickers not being stopped
-      (https://github.com/btcsuite/btcd/issues/189)
-    - Fix an issue where a mix of orphans and SPV clients could trigger a
-      condition where peers would no longer be served
-      (https://github.com/btcsuite/btcd/issues/231)
-    - The RPC username and password can now contain symbols which previously
-      conflicted with special symbols used in URLs
-    - Improve handling of obtaining random nonces to prevent cases where it
-      could error when not enough entropy was available
-    - Improve handling of home directory creation errors such as in the case
-      of unmounted symlinks (https://github.com/btcsuite/btcd/issues/193)
-    - Improve the error reporting for rejected transactions to include the
-      inputs which are missing and/or being double spent
-    - Update sample config file with new options and correct a comment
-      regarding the fact the RPC server only listens on localhost by default
-      (https://github.com/btcsuite/btcd/issues/218)
-    - Update the continuous integration builds to run several tools which
-      help keep code quality high
-    - Significant amount of internal code cleanup and improvements
-    - Other minor internal optimizations
-  - Code Contributors (alphabetical order):
-    - Beldur
-    - Ben Holden-Crowther
-    - Dave Collins
-    - David Evans
-    - David Hill
-    - Guilherme Salgado
-    - Javed Khan
-    - Jimmy Song
-    - John C. Vernaleo
-    - Jonathan Gillham
-    - Josh Rickmar
-    - Michael Ford
-    - Michail Kargakis
-    - kac
-    - Olaoluwa Osuntokun
-
-Changes in 0.9.0 (Sat Sep 20 2014)
-  - Protocol and network related changes:
-    - Add a new checkpoint at block height 319400
-    - Add support for BIP0037 bloom filters
-      (https://github.com/conformal/btcd/issues/132)
-    - Implement BIP0061 reject handling and hence support for protocol
-      version 70002 (https://github.com/conformal/btcd/issues/133)
-    - Add testnet DNS seeds for peer discovery (testnet-seed.alexykot.me
-      and testnet-seed.bitcoin.schildbach.de)
-    - Add mainnet DNS seed for peer discovery (seeds.bitcoin.open-nodes.org)
-    - Make multisig transactions with non-null dummy data nonstandard
-      (https://github.com/conformal/btcd/issues/131)
-    - Make transactions with an excessive number of signature operations
-      nonstandard
-    - Perform initial DNS lookups concurrently which allows connections
-      more quickly
-    - Improve the address manager to significantly reduce memory usage and
-      add tests
-    - Remove orphan transactions when they appear in a mined block
-      (https://github.com/conformal/btcd/issues/166)
-    - Apply incremental back off on connection retries for persistent peers
-      that give invalid replies to mirror the logic used for failed
-      connections (https://github.com/conformal/btcd/issues/103)
-    - Correct rate-limiting of free and low-fee transactions
-  - Mining support changes:
-    - Implement getblocktemplate RPC with the following support:
-      (https://github.com/conformal/btcd/issues/124)
-      - BIP0022 Non-Optional Sections
-      - BIP0022 Long Polling
-      - BIP0023 Basic Pool Extensions
-      - BIP0023 Mutation coinbase/append
-      - BIP0023 Mutations time, time/increment, and time/decrement
-      - BIP0023 Mutation transactions/add
-      - BIP0023 Mutations prevblock, coinbase, and generation
-      - BIP0023 Block Proposals
-    - Implement built-in concurrent CPU miner
-      (https://github.com/conformal/btcd/issues/137)
-      NOTE: CPU mining on mainnet is pointless.  This has been provided
-      for testing purposes such as for the new simulation test network
-    - Add --generate flag to enable CPU mining
-    - Deprecate the --getworkkey flag in favor of --miningaddr which
-      specifies which addresses generated blocks will choose from to pay
-      the subsidy to
-  - RPC changes:
-    - Implement gettxout command
-      (https://github.com/conformal/btcd/issues/141)
-    - Implement validateaddress command
-    - Implement verifymessage command
-    - Mark getunconfirmedbalance RPC as wallet-only
-    - Mark getwalletinfo RPC as wallet-only
-    - Update getgenerate, setgenerate, gethashespersec, and getmininginfo
-      to return the appropriate information about new CPU mining status
-    - Modify getpeerinfo pingtime and pingwait field types to float64 so
-      they are compatible
-    - Improve disconnect handling for normal HTTP clients
-    - Make error code returns for invalid hex more consistent
-  - Websocket changes:
-    - Switch to a new more efficient websocket package
-      (https://github.com/conformal/btcd/issues/134)
-    - Add rescanfinished notification
-    - Modify the rescanprogress notification to include block hash as well
-      as height (https://github.com/conformal/btcd/issues/151)
-  - btcctl utility changes:
-    - Accept --simnet flag which automatically selects the appropriate port
-      and TLS certificates needed to communicate with btcd and btcwallet on
-      the simulation test network
-    - Fix createrawtransaction command to send amounts denominated in BTC
-    - Add estimatefee command
-    - Add estimatepriority command
-    - Add getmininginfo command
-    - Add getnetworkinfo command
-    - Add gettxout command
-    - Add lockunspent command
-    - Add signrawtransaction command
-  - addblock utility changes:
-    - Accept --simnet flag which automatically selects the appropriate port
-      and TLS certificates needed to communicate with btcd and btcwallet on
-      the simulation test network
-  - Notable developer-related package changes:
-    - Provide a new bloom package in btcutil which allows creating and
-      working with BIP0037 bloom filters
-    - Provide a new hdkeychain package in btcutil which allows working with
-      BIP0032 hierarchical deterministic key chains
-    - Introduce a new btcnet package which houses network parameters
-    - Provide new simnet network (--simnet) which is useful for private
-      simulation testing
-    - Enforce low S values in serialized signatures as detailed in BIP0062
-    - Return errors from all methods on the btcdb.Db interface
-      (https://github.com/conformal/btcdb/issues/5)
-    - Allow behavior flags to alter btcchain.ProcessBlock
-      (https://github.com/conformal/btcchain/issues/5)
-    - Provide a new SerializeSize API for blocks
-      (https://github.com/conformal/btcwire/issues/19)
-    - Several of the core packages now work with Google App Engine
-  - Misc changes:
-    - Correct an issue where the database could corrupt under certain
-      circumstances which would require a new chain download
-    - Slightly optimize deserialization
-    - Use the correct IP block for he.net
-    - Fix an issue where it was possible the block manager could hang on
-      shutdown
-    - Update sample config file so the comments are on a separate line
-      rather than the end of a line so they are not interpreted as settings
-      (https://github.com/conformal/btcd/issues/135)
-    - Correct an issue where getdata requests were not being properly
-      throttled which could lead to larger than necessary memory usage
-    - Always show help when given the help flag even when the config file
-      contains invalid entries
-    - General code cleanup and minor optimizations
-
-Changes in 0.8.0-beta (Sun May 25 2014)
-  - Btcd is now Beta (https://github.com/conformal/btcd/issues/130)
-  - Add a new checkpoint at block height 300255
-  - Protocol and network related changes:
-    - Lower the minimum transaction relay fee to 1000 satoshi to match
-      recent reference client changes
-      (https://github.com/conformal/btcd/issues/100)
-    - Raise the maximum signature script size to support standard 15-of-15
-      multi-signature pay-to-sript-hash transactions with compressed pubkeys
-      to remain compatible with the reference client
-      (https://github.com/conformal/btcd/issues/128)
-    - Reduce max bytes allowed for a standard nulldata transaction to 40 for
-      compatibility with the reference client
-    - Introduce a new btcnet package which houses all of the network params
-      for each network (mainnet, testnet, regtest) to ultimately enable
-      easier addition and tweaking of networks without needing to change
-      several packages
-    - Fix several script discrepancies found by reference client test data
-    - Add new DNS seed for peer discovery (seed.bitnodes.io)
-    - Reduce the max known inventory cache from 20000 items to 1000 items
-    - Fix an issue where unknown inventory types could lead to a hung peer
-    - Implement inventory rebroadcast handler for sendrawtransaction
-      (https://github.com/conformal/btcd/issues/99)
-    - Update user agent to fully support BIP0014
-      (https://github.com/conformal/btcwire/issues/10)
-  - Implement initial mining support:
-    - Add a new logging subsystem for mining related operations
-    - Implement infrastructure for creating block templates
-    - Provide options to control block template creation settings
-    - Support the getwork RPC
-    - Allow address identifiers to apply to more than one network since both
-      testnet and the regression test network unfortunately use the same
-      identifier
-  - RPC changes:
-    - Set the content type for HTTP POST RPC connections to application/json
-      (https://github.com/conformal/btcd/issues/121)
-    - Modified the RPC server startup so it only requires at least one valid
-      listen interface
-    - Correct an error path where it was possible certain errors would not
-      be returned
-    - Implement getwork command
-      (https://github.com/conformal/btcd/issues/125)
-    - Update sendrawtransaction command to reject orphans
-    - Update sendrawtransaction command to include the reason a transaction
-      was rejected
-    - Update getinfo command to populate connection count field
-    - Update getinfo command to include relay fee field
-      (https://github.com/conformal/btcd/issues/107)
-    - Allow transactions submitted with sendrawtransaction to bypass the
-      rate limiter
-    - Allow the getcurrentnet and getbestblock extensions to be accessed via
-      HTTP POST in addition to Websockets
-      (https://github.com/conformal/btcd/issues/127)
-  - Websocket changes:
-    - Rework notifications to ensure they are delivered in the order they
-      occur
-    - Rename notifynewtxs command to notifyreceived (funds received)
-    - Rename notifyallnewtxs command to notifynewtransactions
-    - Rename alltx notification to txaccepted
-    - Rename allverbosetx notification to txacceptedverbose
-      (https://github.com/conformal/btcd/issues/98)
-    - Add rescan progress notification
-    - Add recvtx notification
-    - Add redeemingtx notification
-    - Modify notifyspent command to accept an array of outpoints
-      (https://github.com/conformal/btcd/issues/123)
-    - Significantly optimize the rescan command to yield up to a 60x speed
-      increase
-  - btcctl utility changes:
-    - Add createencryptedwallet command
-    - Add getblockchaininfo command
-    - Add importwallet command
-    - Add addmultisigaddress command
-    - Add setgenerate command
-    - Accept --testnet and --wallet flags which automatically select
-      the appropriate port and TLS certificates needed to communicate
-      with btcd and btcwallet (https://github.com/conformal/btcd/issues/112)
-    - Allow path expansion from config file entries
-      (https://github.com/conformal/btcd/issues/113)
-    - Minor refactor simplify handling of options
-  - addblock utility changes:
-    - Improve logging by making it consistent with the logging provided by
-      btcd (https://github.com/conformal/btcd/issues/90)
-  - Improve several package APIs for developers:
-    - Add new amount type for consistently handling monetary values
-    - Add new coin selector API
-    - Add new WIF (Wallet Import Format) API
-    - Add new crypto types for private keys and signatures
-    - Add new API to sign transactions including script merging and hash
-      types
-    - Expose function to extract all pushed data from a script
-      (https://github.com/conformal/btcscript/issues/8)
-  - Misc changes:
-    - Optimize address manager shuffling to do 67% less work on average
-    - Resolve a couple of benign data races found by the race detector
-      (https://github.com/conformal/btcd/issues/101)
-    - Add IP address to all peer related errors to clarify which peer is the
-      cause (https://github.com/conformal/btcd/issues/102)
-    - Fix a UPNP case issue that prevented the --upnp option from working
-      with some UPNP servers
-    - Update documentation in the sample config file regarding debug levels
-    - Adjust some logging levels to improve debug messages
-    - Improve the throughput of query messages to the block manager
-    - Several minor optimizations to reduce GC churn and enhance speed
-    - Other minor refactoring
-    - General code cleanup
-
-Changes in 0.7.0 (Thu Feb 20 2014)
-  - Fix an issue when parsing scripts which contain a multi-signature script
-    which require zero signatures such as testnet block
-    000000001881dccfeda317393c261f76d09e399e15e27d280e5368420f442632
-    (https://github.com/conformal/btcscript/issues/7)
-  - Add check to ensure all transactions accepted to mempool only contain
-    canonical data pushes (https://github.com/conformal/btcscript/issues/6)
-  - Fix an issue causing excessive memory consumption
-  - Significantly rework and improve the websocket notification system:
-    - Each client is now independent so slow clients no longer limit the
-      speed of other connected clients
-    - Potentially long-running operations such as rescans are now run in
-      their own handler and rate-limited to one operation at a time without
-      preventing simultaneous requests from the same client for the faster
-      requests or notifications
-    - A couple of scenarios which could cause shutdown to hang have been
-      resolved
-    - Update notifynewtx notifications to support all address types instead
-      of only pay-to-pubkey-hash
-    - Provide a --rpcmaxwebsockets option to allow limiting the number of
-      concurrent websocket clients
-    - Add a new websocket command notifyallnewtxs to request notifications
-      (https://github.com/conformal/btcd/issues/86) (thanks @flammit)
-  - Improve btcctl utility in the following ways:
-    - Add getnetworkhashps command
-    - Add gettransaction command (wallet-specific)
-    - Add signmessage command (wallet-specific)
-    - Update getwork command to accept
-  - Continue cleanup and work on implementing the RPC API:
-    - Implement getnettotals command
-      (https://github.com/conformal/btcd/issues/84)
-    - Implement networkhashps command
-      (https://github.com/conformal/btcd/issues/87)
-    - Update getpeerinfo to always include syncnode field even when false
-    - Remove help addenda for getpeerinfo now that it supports all fields
-  - Close standard RPC connections on auth failure
-  - Provide a --rpcmaxclients option to allow limiting the number of
-    concurrent RPC clients (https://github.com/conformal/btcd/issues/68)
-  - Include IP address in RPC auth failure log messages
-  - Resolve a rather harmless data races found by the race detector
-    (https://github.com/conformal/btcd/issues/94)
-  - Increase block priority size and max standard transaction size to 50k
-    and 100k, respectively (https://github.com/conformal/btcd/issues/71)
-  - Add rate limiting of free transactions to the memory pool to prevent
-    penny flooding (https://github.com/conformal/btcd/issues/40)
-  - Provide a --logdir option (https://github.com/conformal/btcd/issues/95)
-  - Change the default log file path to include the network
-  - Add a new ScriptBuilder interface to btcscript to support creation of
-    custom scripts (https://github.com/conformal/btcscript/issues/5)
-  - General code cleanup
-
-Changes in 0.6.0 (Tue Feb 04 2014)
-  - Fix an issue when parsing scripts which contain invalid signatures that
-    caused a chain fork on block
-    0000000000000001e4241fd0b3469a713f41c5682605451c05d3033288fb2244
-  - Correct an issue which could lead to an error in removeBlockNode
-    (https://github.com/conformal/btcchain/issues/4)
-  - Improve addblock utility as follows:
-    - Check imported blocks against all chain rules and checkpoints
-    - Skip blocks which are already known so you can stop and restart the
-      import or start the import after you have already downloaded a portion
-      of the chain
-    - Correct an issue where the utility did not shutdown cleanly after
-      processing all blocks
-    - Add error on attempt to import orphan blocks
-    - Improve error handling and reporting
-    - Display statistics after input file has been fully processed
-  - Rework, optimize, and improve headers-first mode:
-    - Resuming the chain sync from any point before the final checkpoint
-      will now use headers-first mode
-      (https://github.com/conformal/btcd/issues/69)
-    - Verify all checkpoints as opposed to only the final one
-    - Reduce and bound memory usage
-    - Rollback to the last known good point when a header does not match a
-      checkpoint
-    - Log information about what is happening with headers
-  - Improve btcctl utility in the following ways:
-    - Add getaddednodeinfo command
-    - Add getnettotals command
-    - Add getblocktemplate command (wallet-specific)
-    - Add getwork command (wallet-specific)
-    - Add getnewaddress command (wallet-specific)
-    - Add walletpassphrasechange command (wallet-specific)
-    - Add walletlock command (wallet-specific)
-    - Add sendfrom command (wallet-specific)
-    - Add sendmany command (wallet-specific)
-    - Add settxfee command (wallet-specific)
-    - Add listsinceblock command (wallet-specific)
-    - Add listaccounts command (wallet-specific)
-    - Add keypoolrefill command (wallet-specific)
-    - Add getreceivedbyaccount command (wallet-specific)
-    - Add getrawchangeaddress command (wallet-specific)
-    - Add gettxoutsetinfo command (wallet-specific)
-    - Add listaddressgroupings command (wallet-specific)
-    - Add listlockunspent command (wallet-specific)
-    - Add listlock command (wallet-specific)
-    - Add listreceivedbyaccount command (wallet-specific)
-    - Add validateaddress command (wallet-specific)
-    - Add verifymessage command (wallet-specific)
-    - Add sendtoaddress command (wallet-specific)
-  - Continue cleanup and work on implementing the RPC API:
-    - Implement submitblock command
-      (https://github.com/conformal/btcd/issues/61)
-    - Implement help command
-    - Implement ping command
-    - Implement getaddednodeinfo command
-      (https://github.com/conformal/btcd/issues/78)
-    - Implement getinfo command
-    - Update getpeerinfo to support bytesrecv and bytessent
-      (https://github.com/conformal/btcd/issues/83)
-  - Improve and correct several RPC server and websocket areas:
-    - Change the connection endpoint for websockets from /wallet to /ws
-      (https://github.com/conformal/btcd/issues/80)
-    - Implement an alternative authentication for websockets so clients
-      such as javascript from browsers that don't support setting HTTP
-      headers can authenticate (https://github.com/conformal/btcd/issues/77)
-    - Add an authentication deadline for RPC connections
-      (https://github.com/conformal/btcd/issues/68)
-    - Use standard authentication failure responses for RPC connections
-    - Make automatically generated certificate more standard so it works
-      from client such as node.js and Firefox
-    - Correct some minor issues which could prevent the RPC server from
-      shutting down in an orderly fashion
-    - Make all websocket notifications require registration
-    - Change the data sent over websockets to text since it is JSON-RPC
-    - Allow connections that do not have an Origin header set
-  - Expose and track the number of bytes read and written per peer
-    (https://github.com/conformal/btcwire/issues/6)
-  - Correct an issue with sendrawtransaction when invoked via websockets
-    which prevented a minedtx notification from being added
-  - Rescan operations issued from remote wallets are no stopped when
-    the wallet disconnects mid-operation
-    (https://github.com/conformal/btcd/issues/66)
-  - Several optimizations related to fetching block information from the
-    database
-  - General code cleanup
-
-Changes in 0.5.0 (Mon Jan 13 2014)
-  - Optimize initial block download by introducing a new mode which
-    downloads the block headers first (up to the final checkpoint)
-  - Improve peer handling to remove the potential for slow peers to cause
-    sluggishness amongst all peers
-    (https://github.com/conformal/btcd/issues/63)
-  - Fix an issue where the initial block sync could stall when the sync peer
-    disconnects (https://github.com/conformal/btcd/issues/62)
-  - Correct an issue where --externalip was doing a DNS lookup on the full
-    host:port instead of just the host portion
-    (https://github.com/conformal/btcd/issues/38)
-  - Fix an issue which could lead to a panic on chain switches
-    (https://github.com/conformal/btcd/issues/70)
-  - Improve btcctl utility in the following ways:
-    - Show getdifficulty output as floating point to 6 digits of precision
-    - Show all JSON object replies formatted as standard JSON
-    - Allow btcctl getblock to accept optional params
-    - Add getaccount command (wallet-specific)
-    - Add getaccountaddress command (wallet-specific)
-    - Add sendrawtransaction command
-  - Continue cleanup and work on implementing RPC API calls
-    - Update getrawmempool to support new optional verbose flag
-    - Update getrawtransaction to match the reference client
-    - Update getblock to support new optional verbose flag
-    - Update raw transactions to fully match the reference client including
-      support for all transaction types and address types
-    - Correct getrawmempool fee field to return BTC instead of Satoshi
-    - Correct getpeerinfo service flag to return 8 digit string so it
-      matches the reference client
-    - Correct verifychain to return a boolean
-    - Implement decoderawtransaction command
-    - Implement createrawtransaction command
-    - Implement decodescript command
-    - Implement gethashespersec command
-    - Allow RPC handler overrides when invoked via a websocket versus
-      legacy connection
-  - Add new DNS seed for peer discovery
-  - Display user agent on new valid peer log message
-    (https://github.com/conformal/btcd/issues/64)
-  - Notify wallet when new transactions that pay to registered addresses
-    show up in the mempool before being mined into a block
-  - Support a tor-specific proxy in addition to a normal proxy
-    (https://github.com/conformal/btcd/issues/47)
-  - Remove deprecated sqlite3 imports from utilities
-  - Remove leftover profile write from addblock utility
-  - Quite a bit of code cleanup and refactoring to improve maintainability
-
-Changes in 0.4.0 (Thu Dec 12 2013)
-  - Allow listen interfaces to be specified via --listen instead of only the
-    port (https://github.com/conformal/btcd/issues/33)
-  - Allow listen interfaces for the RPC server to be specified via
-    --rpclisten instead of only the port
-    (https://github.com/conformal/btcd/issues/34)
-  - Only disable listening when --connect or --proxy are used when no
-    --listen interface are specified
-    (https://github.com/conformal/btcd/issues/10)
-  - Add several new standard transaction checks to transaction memory pool:
-    - Support nulldata scripts as standard
-    - Only allow a max of one nulldata output per transaction
-    - Enforce a maximum of 3 public keys in multi-signature transactions
-    - The number of signatures in multi-signature transactions must not
-      exceed the number of public keys
-    - The number of inputs to a signature script must match the expected
-      number of inputs for the script type
-    - The number of inputs pushed onto the stack by a redeeming signature
-      script must match the number of inputs consumed by the referenced
-      public key script
-  - When a block is connected, remove any transactions from the memory pool
-    which are now double spends as a result of the newly connected
-    transactions
-  - Don't relay transactions resurrected during a chain switch since
-    other peers will also be switching chains and therefore already know
-    about them
-  - Cleanup a few cases where rejected transactions showed as an error
-    rather than as a rejected transaction
-  - Ignore the default configuration file when --regtest (regression test
-    mode) is specified
-  - Implement TLS support for RPC including automatic certificate generation
-  - Support HTTP authentication headers for web sockets
-  - Update address manager to recognize and properly work with Tor
-    addresses (https://github.com/conformal/btcd/issues/36) and
-    (https://github.com/conformal/btcd/issues/37)
-  - Improve btcctl utility in the following ways:
-    - Add the ability to specify a configuration file
-    - Add a default entry for the RPC cert to point to the location
-      it will likely be in the btcd home directory
-    - Implement --version flag
-    - Provide a --notls option to support non-TLS configurations
-  - Fix a couple of minor races found by the Go race detector
-  - Improve logging
-    - Allow logging level to be specified on a per subsystem basis
-      (https://github.com/conformal/btcd/issues/48)
-    - Allow logging levels to be dynamically changed via RPC
-      (https://github.com/conformal/btcd/issues/15)
-    - Implement a rolling log file with a max of 10MB per file and a
-      rotation size of 3 which results in a max logging size of 30 MB
-  - Correct a minor issue with the rescanning websocket call
-    (https://github.com/conformal/btcd/issues/54)
-  - Fix a race with pushing address messages that could lead to a panic
-    (https://github.com/conformal/btcd/issues/58)
-  - Improve which external IP address is reported to peers based on which
-    interface they are connected through
-    (https://github.com/conformal/btcd/issues/35)
-  - Add --externalip option to allow an external IP address to be specified
-    for cases such as tor hidden services or advanced network configurations
-    (https://github.com/conformal/btcd/issues/38)
-  - Add --upnp option to support automatic port mapping via UPnP
-    (https://github.com/conformal/btcd/issues/51)
-  - Update Ctrl+C interrupt handler to properly sync address manager and
-    remove the UPnP port mapping (if needed)
-  - Continue cleanup and work on implementing RPC API calls
-    - Add importprivkey (import private key) command to btcctl
-    - Update getrawtransaction to provide addresses properly, support
-      new verbose param, and match the reference implementation with the
-      exception of MULTISIG (thanks @flammit)
-    - Update getblock with new verbose flag (thanks @flammit)
-    - Add listtransactions command to btcctl
-    - Add getbalance command to btcctl
-  - Add basic support for btcd to run as a native Windows service
-    (https://github.com/conformal/btcd/issues/42)
-  - Package addblock utility with Windows MSIs
-  - Add support for TravisCI (continuous build integration)
-  - Cleanup some documentation and usage
-  - Several other minor bug fixes and general code cleanup
-
-Changes in 0.3.3 (Wed Nov 13 2013)
-  - Significantly improve initial block chain download speed
-    (https://github.com/conformal/btcd/issues/20)
-  - Add a new checkpoint at block height 267300
-  - Optimize most recently used inventory handling
-    (https://github.com/conformal/btcd/issues/21)
-  - Optimize duplicate transaction input check
-    (https://github.com/conformal/btcchain/issues/2)
-  - Optimize transaction hashing
-    (https://github.com/conformal/btcd/issues/25)
-  - Rework and optimize wallet listener notifications
-    (https://github.com/conformal/btcd/issues/22)
-  - Optimize serialization and deserialization
-    (https://github.com/conformal/btcd/issues/27)
-  - Add support for minimum transaction fee to memory pool acceptance
-    (https://github.com/conformal/btcd/issues/29)
-  - Improve leveldb database performance by removing explicit GC call
-  - Fix an issue where Ctrl+C was not always finishing orderly database
-    shutdown
-  - Fix an issue in the script handling for OP_CHECKSIG
-  - Impose max limits on all variable length protocol entries to prevent
-    abuse from malicious peers
-  - Enforce DER signatures for transactions allowed into the memory pool
-  - Separate the debug profile http server from the RPC server
-  - Rework of the RPC code to improve performance and make the code cleaner
-  - The getrawtransaction RPC call now properly checks the memory pool
-    before consulting the db (https://github.com/conformal/btcd/issues/26)
-  - Add support for the following RPC calls: getpeerinfo, getconnectedcount,
-    addnode, verifychain
-    (https://github.com/conformal/btcd/issues/13)
-    (https://github.com/conformal/btcd/issues/17)
-  - Implement rescan websocket extension to allow wallet rescans
-  - Use correct paths for application data storage for all supported
-    operating systems (https://github.com/conformal/btcd/issues/30)
-  - Add a default redirect to the http profiling page when accessing the
-    http profile server
-  - Add a new --cpuprofile option which can be used to generate CPU
-    profiling data on platforms that support it
-  - Several other minor performance optimizations
-  - Other minor bug fixes and general code cleanup
-
-Changes in 0.3.2 (Tue Oct 22 2013)
-  - Fix an issue that could cause the download of the block chain to stall
-    (https://github.com/conformal/btcd/issues/12)
-  - Remove deprecated sqlite as an available database backend
-  - Close sqlite compile issue as sqlite has now been removed
-    (https://github.com/conformal/btcd/issues/11)
-  - Change default RPC ports to 8334 (mainnet) and 18334 (testnet)
-  - Continue cleanup and work on implementing RPC API calls
-  - Add support for the following RPC calls: getrawmempool,
-    getbestblockhash, decoderawtransaction, getdifficulty,
-    getconnectioncount, getpeerinfo, and addnode
-  - Improve the btcctl utility that is used to issue JSON-RPC commands
-  - Fix an issue preventing btcd from cleanly shutting down with the RPC
-    stop command
-  - Add a number of database interface tests to ensure backends implement
-    the expected interface
-  - Expose some additional information from btcscript to be used for
-    identifying "standard"" transactions
-  - Add support for plan9 - thanks @mischief
-    (https://github.com/conformal/btcd/pull/19)
-  - Other minor bug fixes and general code cleanup
-
-Changes in 0.3.1-alpha (Tue Oct 15 2013)
-  - Change default database to leveldb
-    NOTE: This does mean you will have to redownload the block chain.  Since we
-    are still in alpha, we didn't feel writing a converter was worth the time as
-    it would take away from more important issues at this stage
-  - Add a warning if there are multiple block chain databases of different types
-  - Fix issue with unexpected EOF in leveldb -- https://github.com/conformal/btcd/issues/18
-  - Fix issue preventing block 21066 on testnet -- https://github.com/conformal/btcchain/issues/1
-  - Fix issue preventing block 96464 on testnet -- https://github.com/conformal/btcscript/issues/1
-  - Optimize transaction lookups
-  - Correct a few cases of list removal that could result in improper cleanup
-    of no longer needed orphans
-  - Add functionality to increase ulimits on non-Windows platforms
-  - Add support for mempool command which allows remote peers to query the
-    transaction memory pool via the bitcoin protocol
-  - Clean up logging a bit
-  - Add a flag to disable checkpoints for developers
-  - Add a lot of useful debug logging such as message summaries
-  - Other minor bug fixes and general code cleanup
-
-Initial Release 0.3.0-alpha (Sat Oct 05 2013):
-  - Initial release

Jenkinsfile

@@ -1,10 +0,0 @@
-node {
-    stage 'Checkout'
-    checkout scm
-
-    stage 'Version'
-    sh './deploy.sh version'
-
-    stage 'Build'
-    sh "./deploy.sh build"
-}

LICENSE

@@ -1,8 +1,9 @@
 ISC License
 
-Copyright (c) 2018-2019 DAGLabs
-Copyright (c) 2013-20 18 The btcsuite developers
+Copyright (c) 2018-2019 The kaspanet developers
+Copyright (c) 2013-2018 The btcsuite developers
 Copyright (c) 2015-2016 The Decred developers
+Copyright (c) 2013-2014 Conformal Systems LLC.
 
 Permission to use, copy, modify, and distribute this software for any
 purpose with or without fee is hereby granted, provided that the above

README.md

@@ -1,49 +1,24 @@
-btcd
+
+Kaspad
+====
+Warning: This is pre-alpha software. There's no guarantee anything works.
 ====
 
-[![Build Status](https://travis-ci.org/btcsuite/btcd.png?branch=master)](https://travis-ci.org/btcsuite/btcd)
-[![ISC License](http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
-[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](http://godoc.org/github.com/daglabs/btcd)
+[![ISC License](http://img.shields.io/badge/license-ISC-blue.svg)](https://choosealicense.com/licenses/isc/)
+[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](http://godoc.org/github.com/kaspanet/kaspad)
 
-btcd is an alternative full node bitcoin implementation written in Go (golang).
+Kaspad is the reference full node Kaspa implementation written in Go (golang).
 
-This project is currently under active development and is in a Beta state.  It
-is extremely stable and has been in production use since October 2013.
-
-It properly downloads, validates, and serves the block chain using the exact
-rules (including consensus bugs) for block acceptance as Bitcoin Core.  We have
-taken great care to avoid btcd causing a fork to the block chain.  It includes a
-full block validation testing framework which contains all of the 'official'
-block acceptance tests (and some additional ones) that is run on every pull
-request to help ensure it properly follows consensus.  Also, it passes all of
-the JSON test data in the Bitcoin Core code.
-
-It also properly relays newly mined blocks, maintains a transaction pool, and
-relays individual transactions that have not yet made it into a block.  It
-ensures all individual transactions admitted to the pool follow the rules
-required by the block chain and also includes more strict checks which filter
-transactions based on miner requirements ("standard" transactions).
-
-One key difference between btcd and Bitcoin Core is that btcd does *NOT* include
-wallet functionality and this was a very intentional design decision.  See the
-blog entry [here](https://blog.conformal.com/btcd-not-your-moms-bitcoin-daemon)
-for more details.  This means you can't actually make or receive payments
-directly with btcd.  That functionality is provided by the
-[btcwallet](https://github.com/btcsuite/btcwallet) and
-[Paymetheus](https://github.com/btcsuite/Paymetheus) (Windows-only) projects
-which are both under active development.
+This project is currently under active development and is in a pre-Alpha state. 
+Some things still don't work and APIs are far from finalized. The code is provided for reference only.
 
 ## Requirements
 
-[Go](http://golang.org) 1.8 or newer.
+Latest version of [Go](http://golang.org) (currently 1.13).
 
 ## Installation
 
-#### Windows - MSI Available
-
-https://github.com/daglabs/btcd/releases
-
-#### Linux/BSD/MacOSX/POSIX - Build from Source
+#### Build from Source
 
 - Install Go according to the installation instructions here:
   http://golang.org/doc/install
@@ -55,92 +30,50 @@ $ go version
 $ go env GOROOT GOPATH
 ```
 
-NOTE: The `GOROOT` and `GOPATH` above must not be the same path.  It is
+NOTE: The `GOROOT` and `GOPATH` above must not be the same path. It is
 recommended that `GOPATH` is set to a directory in your home directory such as
-`~/goprojects` to avoid write permission issues.  It is also recommended to add
+`~/dev/go` to avoid write permission issues. It is also recommended to add
 `$GOPATH/bin` to your `PATH` at this point.
 
-- Run the following commands to obtain btcd, all dependencies, and install it:
+- Run the following commands to obtain and install kaspad including all dependencies:
 
 ```bash
-$ # Install dep: https://golang.github.io/dep/docs/installation.html
-$ git clone https://github.com/daglabs/btcd $GOPATH/src/github.com/daglabs/btcd
-$ cd $GOPATH/src/github.com/daglabs/btcd
-$ dep ensure
+$ git clone https://github.com/kaspanet/kaspad $GOPATH/src/github.com/kaspanet/kaspad
+$ cd $GOPATH/src/github.com/kaspanet/kaspad
+$ ./test.sh
 $ go install . ./cmd/...
 ```
+`./test.sh` tests can be skipped, but some things might not run correctly on your system if tests fail.
 
-- btcd (and utilities) will now be installed in ```$GOPATH/bin```.  If you did
+- Kaspad (and utilities) should now be installed in `$GOPATH/bin`. If you did
   not already add the bin directory to your system path during Go installation,
-  we recommend you do so now.
+  you are encouraged to do so now.
 
-## Updating
-
-#### Windows
-
-Install a newer MSI
-
-#### Linux/BSD/MacOSX/POSIX - Build from Source
-
-- Run the following commands to update btcd, all dependencies, and install it:
-
-```bash
-$ cd $GOPATH/src/github.com/daglabs/btcd
-$ git pull && dep ensure
-$ go install . ./cmd/...
-```
 
 ## Getting Started
 
-btcd has several configuration options available to tweak how it runs, but all
-of the basic operations described in the intro section work with zero
-configuration.
-
-#### Windows (Installed from MSI)
-
-Launch btcd from your Start menu.
+Kaspad has several configuration options available to tweak how it runs, but all
+of the basic operations work with zero configuration.
 
 #### Linux/BSD/POSIX/Source
 
 ```bash
-$ ./btcd
+$ ./kaspad
 ```
 
-## IRC
-
-- irc.freenode.net
-- channel #btcd
-- [webchat](https://webchat.freenode.net/?channels=btcd)
+## Discord
+Join our discord server using the following link: https://discord.gg/WmGhhzk
 
 ## Issue Tracker
 
-The [integrated github issue tracker](https://github.com/daglabs/btcd/issues)
+The [integrated github issue tracker](https://github.com/kaspanet/kaspad/issues)
 is used for this project.
 
 ## Documentation
 
-The documentation is a work-in-progress.  It is located in the [docs](https://github.com/daglabs/btcd/tree/master/docs) folder.
-
-## GPG Verification Key
-
-All official release tags are signed by Conformal so users can ensure the code
-has not been tampered with and is coming from the btcsuite developers.  To
-verify the signature perform the following:
-
-- Download the Conformal public key:
-  https://raw.githubusercontent.com/btcsuite/btcd/master/release/GIT-GPG-KEY-conformal.txt
-
-- Import the public key into your GPG keyring:
-  ```bash
-  gpg --import GIT-GPG-KEY-conformal.txt
-  ```
-
-- Verify the release tag with the following command where `TAG_NAME` is a
-  placeholder for the specific tag:
-  ```bash
-  git tag -v TAG_NAME
-  ```
+The documentation is a work-in-progress. It is located in the [docs](https://github.com/kaspanet/kaspad/tree/master/docs) folder.
 
 ## License
 
-btcd is licensed under the [copyfree](http://copyfree.org) ISC License.
+Kaspad is licensed under the copyfree [ISC License](https://choosealicense.com/licenses/isc/).
+

addrmgr/cov_report.sh

@@ -1,17 +0,0 @@
-#!/bin/sh
-
-# This script uses gocov to generate a test coverage report.
-# The gocov tool my be obtained with the following command:
-#   go get github.com/axw/gocov/gocov
-#
-# It will be installed to $GOPATH/bin, so ensure that location is in your $PATH.
-
-# Check for gocov.
-type gocov >/dev/null 2>&1
-if [ $? -ne 0 ]; then
-	echo >&2 "This script requires the gocov tool."
-	echo >&2 "You may obtain it with the following command:"
-	echo >&2 "go get github.com/axw/gocov/gocov"
-	exit 1
-fi
-gocov test | gocov report

addrmgr/doc.go

@@ -1,38 +0,0 @@
-// Copyright (c) 2014 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-/*
-Package addrmgr implements concurrency safe Bitcoin address manager.
-
-Address Manager Overview
-
-In order maintain the peer-to-peer Bitcoin network, there needs to be a source
-of addresses to connect to as nodes come and go.  The Bitcoin protocol provides
-the getaddr and addr messages to allow peers to communicate known addresses with
-each other.  However, there needs to a mechanism to store those results and
-select peers from them.  It is also important to note that remote peers can't
-be trusted to send valid peers nor attempt to provide you with only peers they
-control with malicious intent.
-
-With that in mind, this package provides a concurrency safe address manager for
-caching and selecting peers in a non-deterministic manner.  The general idea is
-the caller adds addresses to the address manager and notifies it when addresses
-are connected, known good, and attempted.  The caller also requests addresses as
-it needs them.
-
-The address manager internally segregates the addresses into groups and
-non-deterministically selects groups in a cryptographically random manner.  This
-reduce the chances multiple addresses from the same nets are selected which
-generally helps provide greater peer diversity, and perhaps more importantly,
-drastically reduces the chances an attacker is able to coerce your peer into
-only connecting to nodes they control.
-
-The address manager also understands routability and Tor addresses and tries
-hard to only return routable addresses.  In addition, it uses the information
-provided by the caller about connected, known good, and attempted addresses to
-periodically purge peers which no longer appear to be good peers as well as
-bias the selection toward known good peers.  The general idea is to make a best
-effort at only providing usable addresses.
-*/
-package addrmgr

addrmgr/internal_test.go

@@ -1,25 +0,0 @@
-// Copyright (c) 2013-2015 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package addrmgr
-
-import (
-	"time"
-
-	"github.com/daglabs/btcd/wire"
-)
-
-func TstKnownAddressIsBad(ka *KnownAddress) bool {
-	return ka.isBad()
-}
-
-func TstKnownAddressChance(ka *KnownAddress) float64 {
-	return ka.chance()
-}
-
-func TstNewKnownAddress(na *wire.NetAddress, attempts int,
-	lastattempt, lastsuccess time.Time, tried bool, refs int) *KnownAddress {
-	return &KnownAddress{na: na, attempts: attempts, lastattempt: lastattempt,
-		lastsuccess: lastsuccess, tried: tried, refs: refs}
-}

addrmgr/knownaddress_test.go

@@ -1,114 +0,0 @@
-// Copyright (c) 2013-2015 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package addrmgr_test
-
-import (
-	"math"
-	"testing"
-	"time"
-
-	"github.com/daglabs/btcd/addrmgr"
-	"github.com/daglabs/btcd/wire"
-)
-
-func TestChance(t *testing.T) {
-	now := time.Unix(time.Now().Unix(), 0)
-	var tests = []struct {
-		addr     *addrmgr.KnownAddress
-		expected float64
-	}{
-		{
-			//Test normal case
-			addrmgr.TstNewKnownAddress(&wire.NetAddress{Timestamp: now.Add(-35 * time.Second)},
-				0, time.Now().Add(-30*time.Minute), time.Now(), false, 0),
-			1.0,
-		}, {
-			//Test case in which lastseen < 0
-			addrmgr.TstNewKnownAddress(&wire.NetAddress{Timestamp: now.Add(20 * time.Second)},
-				0, time.Now().Add(-30*time.Minute), time.Now(), false, 0),
-			1.0,
-		}, {
-			//Test case in which lastattempt < 0
-			addrmgr.TstNewKnownAddress(&wire.NetAddress{Timestamp: now.Add(-35 * time.Second)},
-				0, time.Now().Add(30*time.Minute), time.Now(), false, 0),
-			1.0 * .01,
-		}, {
-			//Test case in which lastattempt < ten minutes
-			addrmgr.TstNewKnownAddress(&wire.NetAddress{Timestamp: now.Add(-35 * time.Second)},
-				0, time.Now().Add(-5*time.Minute), time.Now(), false, 0),
-			1.0 * .01,
-		}, {
-			//Test case with several failed attempts.
-			addrmgr.TstNewKnownAddress(&wire.NetAddress{Timestamp: now.Add(-35 * time.Second)},
-				2, time.Now().Add(-30*time.Minute), time.Now(), false, 0),
-			1 / 1.5 / 1.5,
-		},
-	}
-
-	err := .0001
-	for i, test := range tests {
-		chance := addrmgr.TstKnownAddressChance(test.addr)
-		if math.Abs(test.expected-chance) >= err {
-			t.Errorf("case %d: got %f, expected %f", i, chance, test.expected)
-		}
-	}
-}
-
-func TestIsBad(t *testing.T) {
-	now := time.Unix(time.Now().Unix(), 0)
-	future := now.Add(35 * time.Minute)
-	monthOld := now.Add(-43 * time.Hour * 24)
-	secondsOld := now.Add(-2 * time.Second)
-	minutesOld := now.Add(-27 * time.Minute)
-	hoursOld := now.Add(-5 * time.Hour)
-	zeroTime := time.Time{}
-
-	futureNa := &wire.NetAddress{Timestamp: future}
-	minutesOldNa := &wire.NetAddress{Timestamp: minutesOld}
-	monthOldNa := &wire.NetAddress{Timestamp: monthOld}
-	currentNa := &wire.NetAddress{Timestamp: secondsOld}
-
-	//Test addresses that have been tried in the last minute.
-	if addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(futureNa, 3, secondsOld, zeroTime, false, 0)) {
-		t.Errorf("test case 1: addresses that have been tried in the last minute are not bad.")
-	}
-	if addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(monthOldNa, 3, secondsOld, zeroTime, false, 0)) {
-		t.Errorf("test case 2: addresses that have been tried in the last minute are not bad.")
-	}
-	if addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(currentNa, 3, secondsOld, zeroTime, false, 0)) {
-		t.Errorf("test case 3: addresses that have been tried in the last minute are not bad.")
-	}
-	if addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(currentNa, 3, secondsOld, monthOld, true, 0)) {
-		t.Errorf("test case 4: addresses that have been tried in the last minute are not bad.")
-	}
-	if addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(currentNa, 2, secondsOld, secondsOld, true, 0)) {
-		t.Errorf("test case 5: addresses that have been tried in the last minute are not bad.")
-	}
-
-	//Test address that claims to be from the future.
-	if !addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(futureNa, 0, minutesOld, hoursOld, true, 0)) {
-		t.Errorf("test case 6: addresses that claim to be from the future are bad.")
-	}
-
-	//Test address that has not been seen in over a month.
-	if !addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(monthOldNa, 0, minutesOld, hoursOld, true, 0)) {
-		t.Errorf("test case 7: addresses more than a month old are bad.")
-	}
-
-	//It has failed at least three times and never succeeded.
-	if !addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(minutesOldNa, 3, minutesOld, zeroTime, true, 0)) {
-		t.Errorf("test case 8: addresses that have never succeeded are bad.")
-	}
-
-	//It has failed ten times in the last week
-	if !addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(minutesOldNa, 10, minutesOld, monthOld, true, 0)) {
-		t.Errorf("test case 9: addresses that have not succeeded in too long are bad.")
-	}
-
-	//Test an address that should work.
-	if addrmgr.TstKnownAddressIsBad(addrmgr.TstNewKnownAddress(minutesOldNa, 2, minutesOld, hoursOld, true, 0)) {
-		t.Errorf("test case 10: This should be a valid address.")
-	}
-}

addrmgr/test_coverage.txt

@@ -1,62 +0,0 @@
-
-github.com/conformal/btcd/addrmgr/network.go		 GroupKey				 100.00% (23/23)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.reset			 100.00% (6/6)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC5737				 100.00% (4/4)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC1918				 100.00% (4/4)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 New					 100.00% (3/3)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 NetAddressKey				 100.00% (2/2)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC4862				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.numAddresses		 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/log.go		 init					 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/log.go		 DisableLog				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 ipNet					 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsIPv4					 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsLocal				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsOnionCatTor				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC2544				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC3849				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC3927				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC3964				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC4193				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC4380				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC4843				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC6052				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC6145				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRFC6598				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsValid				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/network.go		 IsRoutable				 100.00% (1/1)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.GetBestLocalAddress	 94.74% (18/19)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.AddLocalAddress		 90.91% (10/11)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 getReachabilityFrom			 51.52% (17/33)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 ipString				 50.00% (2/4)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.GetAddress			 9.30% (4/43)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.deserializePeers		 0.00% (0/50)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.Good			 0.00% (0/44)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.savePeers			 0.00% (0/39)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.updateAddress		 0.00% (0/30)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.expireNew			 0.00% (0/22)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.AddressCache		 0.00% (0/16)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.HostToNetAddress		 0.00% (0/15)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.getNewBucket		 0.00% (0/15)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.AddAddressByIP		 0.00% (0/14)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.getTriedBucket		 0.00% (0/14)
-github.com/conformal/btcd/addrmgr/knownaddress.go	 knownAddress.chance			 0.00% (0/13)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.loadPeers			 0.00% (0/11)
-github.com/conformal/btcd/addrmgr/knownaddress.go	 knownAddress.isBad			 0.00% (0/11)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.Connected			 0.00% (0/10)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.addressHandler		 0.00% (0/9)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.pickTried			 0.00% (0/8)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.DeserializeNetAddress	 0.00% (0/7)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.Stop			 0.00% (0/7)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.Attempt			 0.00% (0/7)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.Start			 0.00% (0/6)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.AddAddresses		 0.00% (0/4)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.NeedMoreAddresses		 0.00% (0/3)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.NumAddresses		 0.00% (0/3)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.AddAddress			 0.00% (0/3)
-github.com/conformal/btcd/addrmgr/knownaddress.go	 knownAddress.LastAttempt		 0.00% (0/1)
-github.com/conformal/btcd/addrmgr/knownaddress.go	 knownAddress.NetAddress		 0.00% (0/1)
-github.com/conformal/btcd/addrmgr/addrmanager.go	 AddrManager.find			 0.00% (0/1)
-github.com/conformal/btcd/addrmgr/log.go		 UseLogger				 0.00% (0/1)
-github.com/conformal/btcd/addrmgr			 ---------------------------------	 21.04% (113/537)
-

apiserver/config/config.go

@@ -1,126 +0,0 @@
-package config
-
-import (
-	"errors"
-	"github.com/daglabs/btcd/apiserver/logger"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/util"
-	"github.com/jessevdk/go-flags"
-	"path/filepath"
-)
-
-const (
-	defaultLogFilename    = "apiserver.log"
-	defaultErrLogFilename = "apiserver_err.log"
-)
-
-var (
-	// activeNetParams are the currently active net params
-	activeNetParams dagconfig.Params
-)
-
-var (
-	// Default configuration options
-	defaultLogDir     = util.AppDataDir("apiserver", false)
-	defaultDBAddress  = "localhost:3306"
-	defaultHTTPListen = "0.0.0.0:8080"
-)
-
-// Config defines the configuration options for the API server.
-type Config struct {
-	LogDir      string `long:"logdir" description:"Directory to log output."`
-	RPCUser     string `short:"u" long:"rpcuser" description:"RPC username"`
-	RPCPassword string `short:"P" long:"rpcpass" default-mask:"-" description:"RPC password"`
-	RPCServer   string `short:"s" long:"rpcserver" description:"RPC server to connect to"`
-	RPCCert     string `short:"c" long:"rpccert" description:"RPC server certificate chain for validation"`
-	DisableTLS  bool   `long:"notls" description:"Disable TLS"`
-	DBAddress   string `long:"dbaddress" description:"Database address"`
-	DBUser      string `long:"dbuser" description:"Database user" required:"true"`
-	DBPassword  string `long:"dbpass" description:"Database password" required:"true"`
-	DBName      string `long:"dbname" description:"Database name" required:"true"`
-	HTTPListen  string `long:"listen" description:"HTTP address to listen on (default: 0.0.0.0:8080)"`
-	Migrate     bool   `long:"migrate" description:"Migrate the database to the latest version. The server will not start when using this flag."`
-	TestNet     bool   `long:"testnet" description:"Connect to testnet"`
-	SimNet      bool   `long:"simnet" description:"Connect to the simulation test network"`
-	DevNet      bool   `long:"devnet" description:"Connect to the development test network"`
-}
-
-// Parse parses the CLI arguments and returns a config struct.
-func Parse() (*Config, error) {
-	cfg := &Config{
-		LogDir:     defaultLogDir,
-		DBAddress:  defaultDBAddress,
-		HTTPListen: defaultHTTPListen,
-	}
-	parser := flags.NewParser(cfg, flags.PrintErrors|flags.HelpFlag)
-	_, err := parser.Parse()
-	if err != nil {
-		return nil, err
-	}
-
-	if !cfg.Migrate {
-		if cfg.RPCUser == "" {
-			return nil, errors.New("--rpcuser is required if --migrate flag is not used")
-		}
-		if cfg.RPCPassword == "" {
-			return nil, errors.New("--rpcpass is required if --migrate flag is not used")
-		}
-		if cfg.RPCServer == "" {
-			return nil, errors.New("--rpcserver is required if --migrate flag is not used")
-		}
-	}
-
-	if cfg.RPCCert == "" && !cfg.DisableTLS {
-		return nil, errors.New("--notls has to be disabled if --cert is used")
-	}
-
-	if cfg.RPCCert != "" && cfg.DisableTLS {
-		return nil, errors.New("--cert should be omitted if --notls is used")
-	}
-
-	err = resolveNetwork(cfg)
-	if err != nil {
-		return nil, err
-	}
-
-	logFile := filepath.Join(cfg.LogDir, defaultLogFilename)
-	errLogFile := filepath.Join(cfg.LogDir, defaultErrLogFilename)
-	logger.InitLog(logFile, errLogFile)
-
-	return cfg, nil
-}
-
-func resolveNetwork(cfg *Config) error {
-	// Multiple networks can't be selected simultaneously.
-	numNets := 0
-	if cfg.TestNet {
-		numNets++
-	}
-	if cfg.SimNet {
-		numNets++
-	}
-	if cfg.DevNet {
-		numNets++
-	}
-	if numNets > 1 {
-		return errors.New("multiple net params (testnet, simnet, devnet, etc.) can't be used " +
-			"together -- choose one of them")
-	}
-
-	activeNetParams = dagconfig.MainNetParams
-	switch {
-	case cfg.TestNet:
-		activeNetParams = dagconfig.TestNetParams
-	case cfg.SimNet:
-		activeNetParams = dagconfig.SimNetParams
-	case cfg.DevNet:
-		activeNetParams = dagconfig.DevNetParams
-	}
-
-	return nil
-}
-
-// ActiveNetParams returns the currently active net params
-func ActiveNetParams() *dagconfig.Params {
-	return &activeNetParams
-}

apiserver/controllers/block.go

@@ -1,79 +0,0 @@
-package controllers
-
-import (
-	"encoding/hex"
-	"fmt"
-	"net/http"
-
-	"github.com/daglabs/btcd/apiserver/database"
-	"github.com/daglabs/btcd/apiserver/models"
-	"github.com/daglabs/btcd/apiserver/utils"
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-const (
-	// OrderAscending is parameter that can be used
-	// in a get list handler to get a list ordered
-	// in an ascending order.
-	OrderAscending = "asc"
-
-	// OrderDescending is parameter that can be used
-	// in a get list handler to get a list ordered
-	// in an ascending order.
-	OrderDescending = "desc"
-)
-
-const maxGetBlocksLimit = 100
-
-// GetBlockByHashHandler returns a block by a given hash.
-func GetBlockByHashHandler(blockHash string) (interface{}, *utils.HandlerError) {
-	if bytes, err := hex.DecodeString(blockHash); err != nil || len(bytes) != daghash.HashSize {
-		return nil, utils.NewHandlerError(http.StatusUnprocessableEntity,
-			fmt.Sprintf("The given block hash is not a hex-encoded %d-byte hash.", daghash.HashSize))
-	}
-
-	db, err := database.DB()
-	if err != nil {
-		return nil, utils.NewInternalServerHandlerError(err.Error())
-	}
-
-	block := &models.Block{}
-	dbResult := db.Where(&models.Block{BlockHash: blockHash}).Preload("AcceptingBlock").First(block)
-	dbErrors := dbResult.GetErrors()
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		return nil, utils.NewHandlerError(http.StatusNotFound, "No block with the given block hash was found.")
-	}
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewHandlerErrorFromDBErrors("Some errors where encountered when loading transactions from the database:", dbResult.GetErrors())
-	}
-	return convertBlockModelToBlockResponse(block), nil
-}
-
-// GetBlocksHandler searches for all blocks
-func GetBlocksHandler(order string, skip uint64, limit uint64) (interface{}, *utils.HandlerError) {
-	if limit > maxGetBlocksLimit {
-		return nil, utils.NewHandlerError(http.StatusUnprocessableEntity, fmt.Sprintf("The maximum allowed value for the limit is %d", maxGetTransactionsLimit))
-	}
-	blocks := []*models.Block{}
-	db, err := database.DB()
-	if err != nil {
-		return nil, utils.NewHandlerError(http.StatusInternalServerError, http.StatusText(http.StatusInternalServerError))
-	}
-	query := db.
-		Limit(limit).
-		Offset(skip).
-		Preload("AcceptingBlock")
-	if order == OrderAscending {
-		query = query.Order("`id` ASC")
-	} else if order == OrderDescending {
-		query = query.Order("`id` DESC")
-	} else {
-		return nil, utils.NewHandlerError(http.StatusUnprocessableEntity, fmt.Sprintf("'%s' is not a valid order", order))
-	}
-	query.Find(&blocks)
-	blockResponses := make([]*blockResponse, len(blocks))
-	for i, block := range blocks {
-		blockResponses[i] = convertBlockModelToBlockResponse(block)
-	}
-	return blockResponses, nil
-}

apiserver/controllers/feeestimate.go

@@ -1,13 +0,0 @@
-package controllers
-
-import "github.com/daglabs/btcd/apiserver/utils"
-
-// GetFeeEstimatesHandler returns the fee estimates for different priorities
-// for accepting a transaction in the DAG.
-func GetFeeEstimatesHandler() (interface{}, *utils.HandlerError) {
-	return &feeEstimateResponse{
-		HighPriority:   3,
-		NormalPriority: 2,
-		LowPriority:    1,
-	}, nil
-}

apiserver/controllers/request_types.go

@@ -1,6 +0,0 @@
-package controllers
-
-// RawTransaction represents a raw transaction posted to the API server
-type RawTransaction struct {
-	RawTransaction string `json:"rawTransaction"`
-}

apiserver/controllers/response_types.go

@@ -1,113 +0,0 @@
-package controllers
-
-import (
-	"encoding/hex"
-	"github.com/daglabs/btcd/apiserver/models"
-	"github.com/daglabs/btcd/btcjson"
-)
-
-type transactionResponse struct {
-	TransactionHash         string                       `json:"transactionHash"`
-	TransactionID           string                       `json:"transactionId"`
-	AcceptingBlockHash      string                       `json:"acceptingBlockHash,omitempty"`
-	AcceptingBlockBlueScore uint64                       `json:"acceptingBlockBlueScore,omitempty"`
-	SubnetworkID            string                       `json:"subnetworkId"`
-	LockTime                uint64                       `json:"lockTime"`
-	Gas                     uint64                       `json:"gas,omitempty"`
-	PayloadHash             string                       `json:"payloadHash,omitempty"`
-	Payload                 string                       `json:"payload,omitempty"`
-	Inputs                  []*transactionInputResponse  `json:"inputs"`
-	Outputs                 []*transactionOutputResponse `json:"outputs"`
-	Mass                    uint64                       `json:"mass"`
-}
-
-type transactionOutputResponse struct {
-	TransactionID           string `json:"transactionId,omitempty"`
-	Value                   uint64 `json:"value"`
-	ScriptPubKey            string `json:"scriptPubKey"`
-	Address                 string `json:"address,omitempty"`
-	AcceptingBlockHash      string `json:"acceptingBlockHash,omitempty"`
-	AcceptingBlockBlueScore uint64 `json:"acceptingBlockBlueScore,omitempty"`
-}
-
-type transactionInputResponse struct {
-	TransactionID                  string `json:"transactionId,omitempty"`
-	PreviousTransactionID          string `json:"previousTransactionId"`
-	PreviousTransactionOutputIndex uint32 `json:"previousTransactionOutputIndex"`
-	SignatureScript                string `json:"signatureScript"`
-	Sequence                       uint64 `json:"sequence"`
-	Address                        string `json:"address"`
-}
-
-type blockResponse struct {
-	BlockHash            string
-	Version              int32
-	HashMerkleRoot       string
-	AcceptedIDMerkleRoot string
-	UTXOCommitment       string
-	Timestamp            uint64
-	Bits                 uint32
-	Nonce                uint64
-	AcceptingBlockHash   *string
-	BlueScore            uint64
-	IsChainBlock         bool
-	Mass                 uint64
-}
-
-type feeEstimateResponse struct {
-	HighPriority, NormalPriority, LowPriority float64
-}
-
-func convertTxModelToTxResponse(tx *models.Transaction) *transactionResponse {
-	txRes := &transactionResponse{
-		TransactionHash:         tx.TransactionHash,
-		TransactionID:           tx.TransactionID,
-		AcceptingBlockHash:      tx.AcceptingBlock.BlockHash,
-		AcceptingBlockBlueScore: tx.AcceptingBlock.BlueScore,
-		SubnetworkID:            tx.Subnetwork.SubnetworkID,
-		LockTime:                tx.LockTime,
-		Gas:                     tx.Gas,
-		PayloadHash:             tx.PayloadHash,
-		Payload:                 hex.EncodeToString(tx.Payload),
-		Inputs:                  make([]*transactionInputResponse, len(tx.TransactionInputs)),
-		Outputs:                 make([]*transactionOutputResponse, len(tx.TransactionOutputs)),
-		Mass:                    tx.Mass,
-	}
-	for i, txOut := range tx.TransactionOutputs {
-		txRes.Outputs[i] = &transactionOutputResponse{
-			Value:        txOut.Value,
-			ScriptPubKey: hex.EncodeToString(txOut.ScriptPubKey),
-			Address:      txOut.Address.Address,
-		}
-	}
-	for i, txIn := range tx.TransactionInputs {
-		txRes.Inputs[i] = &transactionInputResponse{
-			PreviousTransactionID:          txIn.PreviousTransactionOutput.Transaction.TransactionID,
-			PreviousTransactionOutputIndex: txIn.PreviousTransactionOutput.Index,
-			SignatureScript:                hex.EncodeToString(txIn.SignatureScript),
-			Sequence:                       txIn.Sequence,
-			Address:                        txIn.PreviousTransactionOutput.Address.Address,
-		}
-	}
-	return txRes
-}
-
-func convertBlockModelToBlockResponse(block *models.Block) *blockResponse {
-	blockRes := &blockResponse{
-		BlockHash:            block.BlockHash,
-		Version:              block.Version,
-		HashMerkleRoot:       block.HashMerkleRoot,
-		AcceptedIDMerkleRoot: block.AcceptedIDMerkleRoot,
-		UTXOCommitment:       block.UTXOCommitment,
-		Timestamp:            uint64(block.Timestamp.Unix()),
-		Bits:                 block.Bits,
-		Nonce:                block.Nonce,
-		BlueScore:            block.BlueScore,
-		IsChainBlock:         block.IsChainBlock,
-		Mass:                 block.Mass,
-	}
-	if block.AcceptingBlock != nil {
-		blockRes.AcceptingBlockHash = btcjson.String(block.AcceptingBlock.BlockHash)
-	}
-	return blockRes
-}

apiserver/controllers/transaction.go

@@ -1,187 +0,0 @@
-package controllers
-
-import (
-	"bytes"
-	"encoding/hex"
-	"encoding/json"
-	"fmt"
-	"net/http"
-
-	"github.com/daglabs/btcd/apiserver/database"
-	"github.com/daglabs/btcd/apiserver/jsonrpc"
-	"github.com/daglabs/btcd/apiserver/models"
-	"github.com/daglabs/btcd/apiserver/utils"
-	"github.com/daglabs/btcd/btcjson"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-	"github.com/jinzhu/gorm"
-)
-
-const maxGetTransactionsLimit = 1000
-
-// GetTransactionByIDHandler returns a transaction by a given transaction ID.
-func GetTransactionByIDHandler(txID string) (interface{}, *utils.HandlerError) {
-	if bytes, err := hex.DecodeString(txID); err != nil || len(bytes) != daghash.TxIDSize {
-		return nil, utils.NewHandlerError(http.StatusUnprocessableEntity,
-			fmt.Sprintf("The given txid is not a hex-encoded %d-byte hash.", daghash.TxIDSize))
-	}
-
-	db, err := database.DB()
-	if err != nil {
-		return nil, utils.NewInternalServerHandlerError(err.Error())
-	}
-
-	tx := &models.Transaction{}
-	query := db.Where(&models.Transaction{TransactionID: txID})
-	dbResult := addTxPreloadedFields(query).First(&tx)
-	dbErrors := dbResult.GetErrors()
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		return nil, utils.NewHandlerError(http.StatusNotFound, "No transaction with the given txid was found.")
-	}
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewHandlerErrorFromDBErrors("Some errors where encountered when loading transaction from the database:", dbErrors)
-	}
-	return convertTxModelToTxResponse(tx), nil
-}
-
-// GetTransactionByHashHandler returns a transaction by a given transaction hash.
-func GetTransactionByHashHandler(txHash string) (interface{}, *utils.HandlerError) {
-	if bytes, err := hex.DecodeString(txHash); err != nil || len(bytes) != daghash.HashSize {
-		return nil, utils.NewHandlerError(http.StatusUnprocessableEntity,
-			fmt.Sprintf("The given txhash is not a hex-encoded %d-byte hash.", daghash.HashSize))
-	}
-
-	db, err := database.DB()
-	if err != nil {
-		return nil, utils.NewHandlerError(http.StatusInternalServerError, http.StatusText(http.StatusInternalServerError))
-	}
-
-	tx := &models.Transaction{}
-	query := db.Where(&models.Transaction{TransactionHash: txHash})
-	dbResult := addTxPreloadedFields(query).First(&tx)
-	dbErrors := dbResult.GetErrors()
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		return nil, utils.NewHandlerError(http.StatusNotFound, "No transaction with the given txhash was found.")
-	}
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewHandlerErrorFromDBErrors("Some errors where encountered when loading transaction from the database:", dbErrors)
-	}
-	return convertTxModelToTxResponse(tx), nil
-}
-
-// GetTransactionsByAddressHandler searches for all transactions
-// where the given address is either an input or an output.
-func GetTransactionsByAddressHandler(address string, skip uint64, limit uint64) (interface{}, *utils.HandlerError) {
-	if limit > maxGetTransactionsLimit {
-		return nil, utils.NewHandlerError(http.StatusUnprocessableEntity,
-			fmt.Sprintf("The maximum allowed value for the limit is %d", maxGetTransactionsLimit))
-	}
-
-	db, err := database.DB()
-	if err != nil {
-		return nil, utils.NewHandlerError(http.StatusInternalServerError, http.StatusText(http.StatusInternalServerError))
-	}
-
-	txs := []*models.Transaction{}
-	query := db.
-		Joins("LEFT JOIN `transaction_outputs` ON `transaction_outputs`.`transaction_id` = `transactions`.`id`").
-		Joins("LEFT JOIN `addresses` AS `out_addresses` ON `out_addresses`.`id` = `transaction_outputs`.`address_id`").
-		Joins("LEFT JOIN `transaction_inputs` ON `transaction_inputs`.`transaction_id` = `transactions`.`id`").
-		Joins("LEFT JOIN `transaction_outputs` AS `inputs_outs` ON `inputs_outs`.`id` = `transaction_inputs`.`transaction_output_id`").
-		Joins("LEFT JOIN `addresses` AS `in_addresses` ON `in_addresses`.`id` = `inputs_outs`.`address_id`").
-		Where("`out_addresses`.`address` = ?", address).
-		Or("`in_addresses`.`address` = ?", address).
-		Limit(limit).
-		Offset(skip).
-		Order("`transactions`.`id` ASC")
-	dbResult := addTxPreloadedFields(query).Find(&txs)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewHandlerErrorFromDBErrors("Some errors where encountered when loading transactions from the database:", dbErrors)
-	}
-	txResponses := make([]*transactionResponse, len(txs))
-	for i, tx := range txs {
-		txResponses[i] = convertTxModelToTxResponse(tx)
-	}
-	return txResponses, nil
-}
-
-// GetUTXOsByAddressHandler searches for all UTXOs that belong to a certain address.
-func GetUTXOsByAddressHandler(address string) (interface{}, *utils.HandlerError) {
-	db, err := database.DB()
-	if err != nil {
-		return nil, utils.NewHandlerError(http.StatusInternalServerError, http.StatusText(http.StatusInternalServerError))
-	}
-
-	var transactionOutputs []*models.TransactionOutput
-	dbErrors := db.
-		Joins("LEFT JOIN `addresses` ON `addresses`.`id` = `transaction_outputs`.`address_id`").
-		Where("`addresses`.`address` = ? AND `transaction_outputs`.`is_spent` = 0", address).
-		Preload("Transaction.AcceptingBlock").
-		Find(&transactionOutputs).GetErrors()
-	if len(dbErrors) > 0 {
-		return nil, utils.NewHandlerErrorFromDBErrors("Some errors where encountered when loading UTXOs from the database:", dbErrors)
-	}
-
-	UTXOsResponses := make([]*transactionOutputResponse, len(transactionOutputs))
-	for i, transactionOutput := range transactionOutputs {
-		UTXOsResponses[i] = &transactionOutputResponse{
-			Value:                   transactionOutput.Value,
-			ScriptPubKey:            hex.EncodeToString(transactionOutput.ScriptPubKey),
-			AcceptingBlockHash:      transactionOutput.Transaction.AcceptingBlock.BlockHash,
-			AcceptingBlockBlueScore: transactionOutput.Transaction.AcceptingBlock.BlueScore,
-		}
-	}
-	return UTXOsResponses, nil
-}
-
-func addTxPreloadedFields(query *gorm.DB) *gorm.DB {
-	return query.Preload("AcceptingBlock").
-		Preload("Subnetwork").
-		Preload("TransactionOutputs").
-		Preload("TransactionOutputs.Address").
-		Preload("TransactionInputs.PreviousTransactionOutput.Transaction").
-		Preload("TransactionInputs.PreviousTransactionOutput.Address")
-}
-
-// PostTransaction forwards a raw transaction to the JSON-RPC API server
-func PostTransaction(requestBody []byte) *utils.HandlerError {
-	client, err := jsonrpc.GetClient()
-	if err != nil {
-		return utils.NewInternalServerHandlerError(err.Error())
-	}
-
-	rawTx := &RawTransaction{}
-	err = json.Unmarshal(requestBody, rawTx)
-	if err != nil {
-		return utils.NewHandlerErrorWithCustomClientMessage(http.StatusUnprocessableEntity,
-			fmt.Sprintf("Error unmarshalling request body: %s", err),
-			"The request body is not json-formatted")
-	}
-
-	txBytes, err := hex.DecodeString(rawTx.RawTransaction)
-	if err != nil {
-		return utils.NewHandlerErrorWithCustomClientMessage(http.StatusUnprocessableEntity,
-			fmt.Sprintf("Error decoding hex raw transaction: %s", err),
-			"The raw transaction is not a hex-encoded transaction")
-	}
-
-	txReader := bytes.NewReader(txBytes)
-	tx := &wire.MsgTx{}
-	err = tx.BtcDecode(txReader, 0)
-	if err != nil {
-		return utils.NewHandlerErrorWithCustomClientMessage(http.StatusUnprocessableEntity,
-			fmt.Sprintf("Error decoding raw transaction: %s", err),
-			"Error decoding raw transaction")
-	}
-
-	_, err = client.SendRawTransaction(tx, true)
-	if err != nil {
-		if rpcErr, ok := err.(btcjson.RPCError); ok && rpcErr.Code == btcjson.ErrRPCVerify {
-			return utils.NewHandlerError(http.StatusInternalServerError, rpcErr.Message)
-		}
-		return utils.NewHandlerError(http.StatusInternalServerError, http.StatusText(http.StatusInternalServerError))
-	}
-
-	return nil
-}

apiserver/database/database.go

@@ -1,140 +0,0 @@
-package database
-
-import (
-	"errors"
-	"fmt"
-	"os"
-
-	"github.com/daglabs/btcd/apiserver/config"
-	"github.com/golang-migrate/migrate/v4/source"
-	"github.com/jinzhu/gorm"
-
-	"github.com/golang-migrate/migrate/v4"
-)
-
-// db is the API server database.
-var db *gorm.DB
-
-// DB returns a reference to the database connection
-func DB() (*gorm.DB, error) {
-	if db == nil {
-		return nil, errors.New("Database is not connected")
-	}
-	return db, nil
-}
-
-type gormLogger struct{}
-
-func (l gormLogger) Print(v ...interface{}) {
-	str := fmt.Sprint(v...)
-	log.Errorf(str)
-}
-
-// Connect connects to the database mentioned in
-// config variable.
-func Connect(cfg *config.Config) error {
-	connectionString := buildConnectionString(cfg)
-	migrator, driver, err := openMigrator(connectionString)
-	if err != nil {
-		return err
-	}
-	isCurrent, version, err := isCurrent(migrator, driver)
-	if err != nil {
-		return fmt.Errorf("Error checking whether the database is current: %s", err)
-	}
-	if !isCurrent {
-		return fmt.Errorf("Database is not current (version %d). Please migrate"+
-			" the database by running the server with --migrate flag and then run it again.", version)
-	}
-
-	db, err = gorm.Open("mysql", connectionString)
-	if err != nil {
-		return err
-	}
-
-	db.SetLogger(gormLogger{})
-	return nil
-}
-
-// Close closes the connection to the database
-func Close() error {
-	if db == nil {
-		return nil
-	}
-	err := db.Close()
-	db = nil
-	return err
-}
-
-func buildConnectionString(cfg *config.Config) string {
-	return fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8&parseTime=True",
-		cfg.DBUser, cfg.DBPassword, cfg.DBAddress, cfg.DBName)
-}
-
-// isCurrent resolves whether the database is on the latest
-// version of the schema.
-func isCurrent(migrator *migrate.Migrate, driver source.Driver) (bool, uint, error) {
-	// Get the current version
-	version, isDirty, err := migrator.Version()
-	if err == migrate.ErrNilVersion {
-		return false, 0, nil
-	}
-	if err != nil {
-		return false, 0, err
-	}
-	if isDirty {
-		return false, 0, fmt.Errorf("Database is dirty")
-	}
-
-	// The database is current if Next returns ErrNotExist
-	_, err = driver.Next(version)
-	if pathErr, ok := err.(*os.PathError); ok {
-		if pathErr.Err == os.ErrNotExist {
-			return true, version, nil
-		}
-	}
-	return false, version, err
-}
-
-func openMigrator(connectionString string) (*migrate.Migrate, source.Driver, error) {
-	driver, err := source.Open("file://migrations")
-	if err != nil {
-		return nil, nil, err
-	}
-	migrator, err := migrate.NewWithSourceInstance(
-		"migrations", driver, "mysql://"+connectionString)
-	if err != nil {
-		return nil, nil, err
-	}
-	return migrator, driver, nil
-}
-
-// Migrate database to the latest version.
-func Migrate(cfg *config.Config) error {
-	connectionString := buildConnectionString(cfg)
-	migrator, driver, err := openMigrator(connectionString)
-	if err != nil {
-		return err
-	}
-	isCurrent, version, err := isCurrent(migrator, driver)
-	if err != nil {
-		return fmt.Errorf("Error checking whether the database is current: %s", err)
-	}
-	if isCurrent {
-		log.Infof("Database is already up-to-date (version %d)", version)
-		return nil
-	}
-	err = migrator.Up()
-	if err != nil {
-		return err
-	}
-	version, isDirty, err := migrator.Version()
-	if err != nil {
-		return err
-	}
-	if isDirty {
-		return fmt.Errorf("error migrating database: database is dirty")
-	}
-	log.Infof("Migrated database to the latest version (version %d)", version)
-	return nil
-}

apiserver/database/log.go

@@ -1,9 +0,0 @@
-package database
-
-import "github.com/daglabs/btcd/util/panics"
-import "github.com/daglabs/btcd/apiserver/logger"
-
-var (
-	log   = logger.BackendLog.Logger("DTBS")
-	spawn = panics.GoroutineWrapperFunc(log, logger.BackendLog)
-)

apiserver/docker/Dockerfile

@@ -1,28 +0,0 @@
-# -- multistage docker build: stage #1: build stage
-FROM golang:1.13-alpine AS build
-
-RUN mkdir -p /go/src/github.com/daglabs/btcd
-
-WORKDIR /go/src/github.com/daglabs/btcd
-
-RUN apk add --no-cache curl git
-
-COPY go.mod .
-COPY go.sum .
-
-RUN go mod download
-
-COPY . .
-
-RUN cd apiserver && CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o apiserver .
-
-# --- multistage docker build: stage #2: runtime image
-FROM alpine
-WORKDIR /app
-
-RUN apk add --no-cache tini
-
-COPY --from=build /go/src/github.com/daglabs/btcd/apiserver/ /app/
-
-ENTRYPOINT ["/sbin/tini", "--"]
-CMD ["/app/apiserver"]

apiserver/jsonrpc/client.go

@@ -1,125 +0,0 @@
-package jsonrpc
-
-import (
-	"errors"
-	"fmt"
-	"io/ioutil"
-	"time"
-
-	"github.com/daglabs/btcd/apiserver/config"
-	"github.com/daglabs/btcd/util/daghash"
-
-	"github.com/daglabs/btcd/rpcclient"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/wire"
-)
-
-// Client represents a connection to the JSON-RPC API of a full node
-type Client struct {
-	*rpcclient.Client
-	OnBlockAdded   chan *BlockAddedMsg
-	OnChainChanged chan *ChainChangedMsg
-}
-
-var client *Client
-
-// GetClient returns an instance of the JSON-RPC client, in case we have an active connection
-func GetClient() (*Client, error) {
-	if client == nil {
-		return nil, errors.New("JSON-RPC is not connected")
-	}
-
-	return client, nil
-}
-
-// BlockAddedMsg defines the message received in onBlockAdded
-type BlockAddedMsg struct {
-	ChainHeight uint64
-	Header      *wire.BlockHeader
-}
-
-// ChainChangedMsg defines the message received in onChainChanged
-type ChainChangedMsg struct {
-	RemovedChainBlockHashes []*daghash.Hash
-	AddedChainBlocks        []*rpcclient.ChainBlock
-}
-
-// Close closes the connection to the JSON-RPC API server
-func Close() {
-	if client == nil {
-		return
-	}
-
-	client.Disconnect()
-	client = nil
-}
-
-// Connect initiates a connection to the JSON-RPC API Server
-func Connect(cfg *config.Config) error {
-	var cert []byte
-	if !cfg.DisableTLS {
-		var err error
-		cert, err = ioutil.ReadFile(cfg.RPCCert)
-		if err != nil {
-			return fmt.Errorf("Error reading certificates file: %s", err)
-		}
-	}
-
-	connCfg := &rpcclient.ConnConfig{
-		Host:           cfg.RPCServer,
-		Endpoint:       "ws",
-		User:           cfg.RPCUser,
-		Pass:           cfg.RPCPassword,
-		DisableTLS:     cfg.DisableTLS,
-		RequestTimeout: time.Second * 5,
-	}
-
-	if !cfg.DisableTLS {
-		connCfg.Certificates = cert
-	}
-
-	var err error
-	client, err = newClient(connCfg)
-	if err != nil {
-		return fmt.Errorf("Error connecting to address %s: %s", cfg.RPCServer, err)
-	}
-
-	return nil
-}
-
-func newClient(connCfg *rpcclient.ConnConfig) (*Client, error) {
-	client = &Client{
-		OnBlockAdded:   make(chan *BlockAddedMsg),
-		OnChainChanged: make(chan *ChainChangedMsg),
-	}
-	notificationHandlers := &rpcclient.NotificationHandlers{
-		OnFilteredBlockAdded: func(height uint64, header *wire.BlockHeader,
-			txs []*util.Tx) {
-			client.OnBlockAdded <- &BlockAddedMsg{
-				ChainHeight: height,
-				Header:      header,
-			}
-		},
-		OnChainChanged: func(removedChainBlockHashes []*daghash.Hash,
-			addedChainBlocks []*rpcclient.ChainBlock) {
-			client.OnChainChanged <- &ChainChangedMsg{
-				RemovedChainBlockHashes: removedChainBlockHashes,
-				AddedChainBlocks:        addedChainBlocks,
-			}
-		},
-	}
-	var err error
-	client.Client, err = rpcclient.New(connCfg, notificationHandlers)
-	if err != nil {
-		return nil, fmt.Errorf("Error connecting to address %s: %s", connCfg.Host, err)
-	}
-
-	if err = client.NotifyBlocks(); err != nil {
-		return nil, fmt.Errorf("Error while registering client %s for block notifications: %s", client.Host(), err)
-	}
-	if err = client.NotifyChainChanges(); err != nil {
-		return nil, fmt.Errorf("Error while registering client %s for chain changes notifications: %s", client.Host(), err)
-	}
-
-	return client, nil
-}

apiserver/log.go

@@ -1,11 +0,0 @@
-package main
-
-import (
-	"github.com/daglabs/btcd/logger"
-	"github.com/daglabs/btcd/util/panics"
-)
-
-var (
-	log   = logger.BackendLog.Logger("APIS")
-	spawn = panics.GoroutineWrapperFunc(log, logger.BackendLog)
-)

apiserver/logger/logger.go

@@ -1,24 +0,0 @@
-package logger
-
-import (
-	"fmt"
-	"github.com/daglabs/btcd/logs"
-	"os"
-)
-
-// BackendLog is the logging backend used to create all subsystem loggers.
-var BackendLog = logs.NewBackend()
-
-// InitLog attaches log file and error log file to the backend log.
-func InitLog(logFile, errLogFile string) {
-	err := BackendLog.AddLogFile(logFile, logs.LevelTrace)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Error adding log file %s as log rotator for level %s: %s", logFile, logs.LevelTrace, err)
-		os.Exit(1)
-	}
-	err = BackendLog.AddLogFile(errLogFile, logs.LevelWarn)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Error adding log file %s as log rotator for level %s: %s", errLogFile, logs.LevelWarn, err)
-		os.Exit(1)
-	}
-}

apiserver/main.go

@@ -1,73 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"os"
-
-	"github.com/daglabs/btcd/apiserver/config"
-	"github.com/daglabs/btcd/apiserver/database"
-	"github.com/daglabs/btcd/apiserver/jsonrpc"
-	"github.com/daglabs/btcd/apiserver/server"
-	"github.com/daglabs/btcd/logger"
-	"github.com/daglabs/btcd/signal"
-	"github.com/daglabs/btcd/util/panics"
-	_ "github.com/golang-migrate/migrate/v4/database/mysql"
-	_ "github.com/golang-migrate/migrate/v4/source/file"
-	_ "github.com/jinzhu/gorm/dialects/mysql"
-)
-
-func main() {
-	defer panics.HandlePanic(log, logger.BackendLog)
-
-	cfg, err := config.Parse()
-	if err != nil {
-		errString := fmt.Sprintf("Error parsing command-line arguments: %s", err)
-		_, fErr := fmt.Fprintf(os.Stderr, errString)
-		if fErr != nil {
-			panic(errString)
-		}
-		return
-	}
-
-	if cfg.Migrate {
-		err := database.Migrate(cfg)
-		if err != nil {
-			panic(fmt.Errorf("Error migrating database: %s", err))
-		}
-		return
-	}
-
-	err = database.Connect(cfg)
-	if err != nil {
-		panic(fmt.Errorf("Error connecting to database: %s", err))
-	}
-	defer func() {
-		err := database.Close()
-		if err != nil {
-			panic(fmt.Errorf("Error closing the database: %s", err))
-		}
-	}()
-
-	err = jsonrpc.Connect(cfg)
-	if err != nil {
-		panic(fmt.Errorf("Error connecting to servers: %s", err))
-	}
-	defer jsonrpc.Close()
-
-	shutdownServer := server.Start(cfg.HTTPListen)
-	defer shutdownServer()
-
-	doneChan := make(chan struct{}, 1)
-	spawn(func() {
-		err := startSync(doneChan)
-		if err != nil {
-			panic(err)
-		}
-	})
-
-	interrupt := signal.InterruptListener()
-	<-interrupt
-
-	// Gracefully stop syncing
-	doneChan <- struct{}{}
-}

apiserver/migrations/000001_create_blocks_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `blocks`;

apiserver/migrations/000001_create_blocks_table.up.sql

@@ -1,23 +0,0 @@
-CREATE TABLE `blocks`
-(
-    `id`                      BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
-    `block_hash`              CHAR(64)        NOT NULL,
-    `accepting_block_id`      BIGINT UNSIGNED NULL,
-    `version`                 INT             NOT NULL,
-    `hash_merkle_root`        CHAR(64)        NOT NULL,
-    `accepted_id_merkle_root` CHAR(64)        NOT NULL,
-    `utxo_commitment`         CHAR(64)        NOT NULL,
-    `timestamp`               DATETIME        NOT NULL,
-    `bits`                    INT UNSIGNED    NOT NULL,
-    `nonce`                   BIGINT UNSIGNED NOT NULL,
-    `blue_score`              BIGINT UNSIGNED NOT NULL,
-    `is_chain_block`          TINYINT         NOT NULL,
-    `mass`                    BIGINT          NOT NULL,
-    PRIMARY KEY (`id`),
-    UNIQUE INDEX `idx_blocks_block_hash` (`block_hash`),
-    INDEX `idx_blocks_timestamp` (`timestamp`),
-    INDEX `idx_blocks_is_chain_block` (`is_chain_block`),
-    CONSTRAINT `fk_blocks_accepting_block_id`
-        FOREIGN KEY (`accepting_block_id`)
-            REFERENCES `blocks` (`id`)
-);

apiserver/migrations/000002_create_parent_blocks_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `parent_blocks`;

apiserver/migrations/000002_create_parent_blocks_table.up.sql

@@ -1,12 +0,0 @@
-CREATE TABLE `parent_blocks`
-(
-    `block_id`        BIGINT UNSIGNED NOT NULL,
-    `parent_block_id` BIGINT UNSIGNED NOT NULL,
-    PRIMARY KEY (`block_id`, `parent_block_id`),
-    CONSTRAINT `fk_parent_blocks_block_id`
-        FOREIGN KEY (`block_id`)
-            REFERENCES `blocks` (`id`),
-    CONSTRAINT `fk_parent_blocks_parent_block_id`
-        FOREIGN KEY (`parent_block_id`)
-            REFERENCES `blocks` (`id`)
-);

apiserver/migrations/000003_create_raw_blocks_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `raw_blocks`;

apiserver/migrations/000003_create_raw_blocks_table.up.sql

@@ -1,9 +0,0 @@
-CREATE TABLE `raw_blocks`
-(
-    `block_id`   BIGINT UNSIGNED NOT NULL,
-    `block_data` BLOB            NOT NULL,
-    PRIMARY KEY (`block_id`),
-    CONSTRAINT `fk_raw_blocks_block_id`
-        FOREIGN KEY (`block_id`)
-            REFERENCES `blocks` (`id`)
-);

apiserver/migrations/000004_create_subnetworks_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `subnetworks`;

apiserver/migrations/000004_create_subnetworks_table.up.sql

@@ -1,8 +0,0 @@
-CREATE TABLE `subnetworks`
-(
-    `id`            BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
-    `subnetwork_id` CHAR(64)     NOT NULL,
-    `gas_limit`     BIGINT UNSIGNED NULL,
-    PRIMARY KEY (`id`),
-    UNIQUE INDEX `idx_subnetworks_subnetwork_id` (`subnetwork_id`)
-);

apiserver/migrations/000005_create_transactions_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `transactions`;

apiserver/migrations/000005_create_transactions_table.up.sql

@@ -1,19 +0,0 @@
-CREATE TABLE `transactions`
-(
-    `id`               BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
-    `accepting_block_id`         BIGINT UNSIGNED NULL,
-    `transaction_hash` CHAR(64)     NOT NULL,
-    `transaction_id`   CHAR(64)     NOT NULL,
-    `lock_time`        BIGINT UNSIGNED NOT NULL,
-    `subnetwork_id`    BIGINT UNSIGNED NOT NULL,
-    `gas`              BIGINT UNSIGNED NOT NULL,
-    `payload_hash`     CHAR(64)     NOT NULL,
-    `payload`          BLOB            NOT NULL,
-    `mass`          BIGINT            NOT NULL,
-    PRIMARY KEY (`id`),
-    UNIQUE INDEX `idx_transactions_transaction_hash` (`transaction_hash`),
-    INDEX `idx_transactions_transaction_id` (`transaction_id`),
-    CONSTRAINT `fk_transactions_accepting_block_id`
-        FOREIGN KEY (`accepting_block_id`)
-            REFERENCES `blocks` (`id`)
-);

apiserver/migrations/000006_create_transactions_to_blocks_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `transactions_to_blocks`;

apiserver/migrations/000006_create_transactions_to_blocks_table.up.sql

@@ -1,14 +0,0 @@
-CREATE TABLE `transactions_to_blocks`
-(
-    `transaction_id`    BIGINT UNSIGNED NOT NULL,
-    `block_id`          BIGINT UNSIGNED NOT NULL,
-    `index` INT UNSIGNED    NOT NULL,
-    PRIMARY KEY (`transaction_id`, `block_id`),
-    INDEX `idx_transactions_to_blocks_index` (`index`),
-    CONSTRAINT `fk_transactions_to_blocks_block_id`
-        FOREIGN KEY (`block_id`)
-            REFERENCES `blocks` (`id`),
-    CONSTRAINT `fk_transactions_to_blocks_transaction_id`
-        FOREIGN KEY (`transaction_id`)
-            REFERENCES `transactions` (`id`)
-);

apiserver/migrations/000007_create_addresses_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `addresses`;

apiserver/migrations/000007_create_addresses_table.up.sql

@@ -1,7 +0,0 @@
-CREATE TABLE `addresses`
-(
-    `id`      BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
-    `address` CHAR(50)        NOT NULL,
-    PRIMARY KEY (`id`),
-    UNIQUE INDEX `idx_addresses_address` (`address`)
-)

apiserver/migrations/000008_create_transaction_outputs_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `transaction_outputs`;

apiserver/migrations/000008_create_transaction_outputs_table.up.sql

@@ -1,18 +0,0 @@
-CREATE TABLE `transaction_outputs`
-(
-    `id`             BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
-    `transaction_id` BIGINT UNSIGNED NOT NULL,
-    `index`          INT UNSIGNED    NOT NULL,
-    `value`          BIGINT UNSIGNED NOT NULL,
-    `script_pub_key` BLOB            NOT NULL,
-    `is_spent`       TINYINT         NOT NULL,
-    `address_id`     BIGINT UNSIGNED NOT NULL,
-    PRIMARY KEY (`id`),
-    INDEX `idx_transaction_outputs_transaction_id` (`transaction_id`),
-    CONSTRAINT `fk_transaction_outputs_transaction_id`
-        FOREIGN KEY (`transaction_id`)
-            REFERENCES `transactions` (`id`),
-    CONSTRAINT `fk_transaction_outputs_address_id`
-        FOREIGN KEY (`address_id`)
-            REFERENCES `addresses` (`id`)
-);

apiserver/migrations/000009_create_transaction_inputs_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE `transaction_inputs`;

apiserver/migrations/000009_create_transaction_inputs_table.up.sql

@@ -1,18 +0,0 @@
-CREATE TABLE `transaction_inputs`
-(
-    `id`                             BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
-    `transaction_id`                 BIGINT UNSIGNED NULL,
-    `previous_transaction_output_id` BIGINT UNSIGNED NOT NULL,
-    `index`                          INT UNSIGNED    NOT NULL,
-    `signature_script`               BLOB            NOT NULL,
-    `sequence`                       BIGINT UNSIGNED NOT NULL,
-    PRIMARY KEY (`id`),
-    INDEX `idx_transaction_inputs_transaction_id` (`transaction_id`),
-    INDEX `idx_transaction_inputs_previous_transaction_output_id` (`previous_transaction_output_id`),
-    CONSTRAINT `fk_transaction_inputs_transaction_id`
-        FOREIGN KEY (`transaction_id`)
-            REFERENCES `transactions` (`id`),
-    CONSTRAINT `fk_transaction_inputs_previous_transaction_output_id`
-        FOREIGN KEY (`previous_transaction_output_id`)
-            REFERENCES `transaction_outputs` (`id`)
-);

apiserver/models/models.go

@@ -1,111 +0,0 @@
-package models
-
-import (
-	"time"
-)
-
-// Block is the gorm model for the 'blocks' table
-type Block struct {
-	ID                   uint64 `gorm:"primary_key"`
-	BlockHash            string
-	AcceptingBlockID     *uint64
-	AcceptingBlock       *Block
-	Version              int32
-	HashMerkleRoot       string
-	AcceptedIDMerkleRoot string
-	UTXOCommitment       string
-	Timestamp            time.Time
-	Bits                 uint32
-	Nonce                uint64
-	BlueScore            uint64
-	IsChainBlock         bool
-	Mass                 uint64
-	ParentBlocks         []Block `gorm:"many2many:parent_blocks;"`
-}
-
-// ParentBlock is the gorm model for the 'parent_blocks' table
-type ParentBlock struct {
-	BlockID       uint64
-	Block         Block
-	ParentBlockID uint64
-	ParentBlock   Block
-}
-
-// RawBlock is the gorm model for the 'raw_blocks' table
-type RawBlock struct {
-	BlockID   uint64
-	Block     Block
-	BlockData []byte
-}
-
-// Subnetwork is the gorm model for the 'subnetworks' table
-type Subnetwork struct {
-	ID           uint64 `gorm:"primary_key"`
-	SubnetworkID string
-	GasLimit     *uint64
-}
-
-// Transaction is the gorm model for the 'transactions' table
-type Transaction struct {
-	ID                 uint64 `gorm:"primary_key"`
-	AcceptingBlockID   *uint64
-	AcceptingBlock     *Block
-	TransactionHash    string
-	TransactionID      string
-	LockTime           uint64
-	SubnetworkID       uint64
-	Subnetwork         Subnetwork
-	Gas                uint64
-	PayloadHash        string
-	Payload            []byte
-	Mass               uint64
-	Blocks             []Block `gorm:"many2many:transactions_to_blocks;"`
-	TransactionOutputs []TransactionOutput
-	TransactionInputs  []TransactionInput
-}
-
-// TransactionBlock is the gorm model for the 'transactions_to_blocks' table
-type TransactionBlock struct {
-	TransactionID uint64
-	Transaction   Transaction
-	BlockID       uint64
-	Block         Block
-	Index         uint32
-}
-
-// TableName returns the table name associated to the
-// TransactionBlock gorm model
-func (TransactionBlock) TableName() string {
-	return "transactions_to_blocks"
-}
-
-// TransactionOutput is the gorm model for the 'transaction_outputs' table
-type TransactionOutput struct {
-	ID            uint64 `gorm:"primary_key"`
-	TransactionID uint64
-	Transaction   Transaction
-	Index         uint32
-	Value         uint64
-	ScriptPubKey  []byte
-	IsSpent       bool
-	AddressID     uint64
-	Address       Address
-}
-
-// TransactionInput is the gorm model for the 'transaction_inputs' table
-type TransactionInput struct {
-	ID                          uint64 `gorm:"primary_key"`
-	TransactionID               uint64
-	Transaction                 Transaction
-	PreviousTransactionOutputID uint64
-	PreviousTransactionOutput   TransactionOutput
-	Index                       uint32
-	SignatureScript             []byte
-	Sequence                    uint64
-}
-
-// Address is the gorm model for the 'utxos' table
-type Address struct {
-	ID      uint64 `gorm:"primary_key"`
-	Address string
-}

apiserver/server/log.go

@@ -1,9 +0,0 @@
-package server
-
-import "github.com/daglabs/btcd/util/panics"
-import "github.com/daglabs/btcd/apiserver/logger"
-
-var (
-	log   = logger.BackendLog.Logger("REST")
-	spawn = panics.GoroutineWrapperFunc(log, logger.BackendLog)
-)

apiserver/server/middlewares.go

@@ -1,50 +0,0 @@
-package server
-
-import (
-	"fmt"
-	"github.com/daglabs/btcd/apiserver/utils"
-	"net/http"
-	"runtime/debug"
-)
-
-var nextRequestID uint64 = 1
-
-func addRequestMetadataMiddleware(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		rCtx := utils.ToAPIServerContext(r.Context()).SetRequestID(nextRequestID)
-		r.WithContext(rCtx)
-		nextRequestID++
-		next.ServeHTTP(w, r)
-	})
-}
-
-func loggingMiddleware(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		ctx := utils.ToAPIServerContext(r.Context())
-		ctx.Infof("Method: %s URI: %s", r.Method, r.RequestURI)
-		next.ServeHTTP(w, r)
-	})
-}
-
-func recoveryMiddleware(h http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		ctx := utils.ToAPIServerContext(r.Context())
-		defer func() {
-			recoveryErr := recover()
-			if recoveryErr != nil {
-				recoveryErrStr := fmt.Sprintf("%s", recoveryErr)
-				log.Criticalf("Fatal error: %s", recoveryErrStr)
-				log.Criticalf("Stack trace: %s", debug.Stack())
-				sendErr(ctx, w, utils.NewInternalServerHandlerError(recoveryErrStr))
-			}
-		}()
-		h.ServeHTTP(w, r)
-	})
-}
-
-func setJSONMiddleware(h http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json; charset=utf-8")
-		h.ServeHTTP(w, r)
-	})
-}

apiserver/server/routes.go

@@ -1,244 +0,0 @@
-package server
-
-import (
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"net/http"
-	"strconv"
-
-	"github.com/daglabs/btcd/apiserver/controllers"
-	"github.com/daglabs/btcd/apiserver/utils"
-	"github.com/gorilla/mux"
-)
-
-const (
-	routeParamTxID      = "txID"
-	routeParamTxHash    = "txHash"
-	routeParamAddress   = "address"
-	routeParamBlockHash = "blockHash"
-)
-
-const (
-	queryParamSkip  = "skip"
-	queryParamLimit = "limit"
-	queryParamOrder = "order"
-)
-
-const (
-	defaultGetTransactionsLimit = 100
-	defaultGetBlocksLimit       = 25
-	defaultGetBlocksOrder       = controllers.OrderAscending
-)
-
-type handlerFunc func(ctx *utils.APIServerContext, routeParams map[string]string, queryParams map[string]string, requestBody []byte) (
-	interface{}, *utils.HandlerError)
-
-func makeHandler(handler handlerFunc) func(http.ResponseWriter, *http.Request) {
-	return func(w http.ResponseWriter, r *http.Request) {
-		ctx := utils.ToAPIServerContext(r.Context())
-
-		var requestBody []byte
-		if r.Method == "POST" {
-			var err error
-			requestBody, err = ioutil.ReadAll(r.Body)
-			if err != nil {
-				sendErr(ctx, w, utils.NewHandlerError(500, "Internal server error occured"))
-			}
-		}
-
-		flattenedQueryParams, hErr := flattenQueryParams(r.URL.Query())
-		if hErr != nil {
-			sendErr(ctx, w, hErr)
-			return
-		}
-
-		response, hErr := handler(ctx, mux.Vars(r), flattenedQueryParams, requestBody)
-		if hErr != nil {
-			sendErr(ctx, w, hErr)
-			return
-		}
-		if response != nil {
-			sendJSONResponse(w, response)
-		}
-	}
-}
-
-func flattenQueryParams(queryParams map[string][]string) (map[string]string, *utils.HandlerError) {
-	flattenedMap := make(map[string]string)
-	for param, valuesSlice := range queryParams {
-		if len(valuesSlice) > 1 {
-			return nil, utils.NewHandlerError(http.StatusUnprocessableEntity, fmt.Sprintf("Couldn't parse the '%s' query parameter:"+
-				" expected a single value but got multiple values", param))
-		}
-		flattenedMap[param] = valuesSlice[0]
-	}
-	return flattenedMap, nil
-}
-
-type clientError struct {
-	ErrorCode    int    `json:"errorCode"`
-	ErrorMessage string `json:"errorMessage"`
-}
-
-func sendErr(ctx *utils.APIServerContext, w http.ResponseWriter, hErr *utils.HandlerError) {
-	errMsg := fmt.Sprintf("got error: %s", hErr)
-	ctx.Warnf(errMsg)
-	w.WriteHeader(hErr.Code)
-	sendJSONResponse(w, &clientError{
-		ErrorCode:    hErr.Code,
-		ErrorMessage: hErr.ClientMessage,
-	})
-}
-
-func sendJSONResponse(w http.ResponseWriter, response interface{}) {
-	b, err := json.Marshal(response)
-	if err != nil {
-		panic(err)
-	}
-	_, err = fmt.Fprintf(w, string(b))
-	if err != nil {
-		panic(err)
-	}
-}
-
-func mainHandler(_ *utils.APIServerContext, routeParams map[string]string, _ map[string]string, _ []byte) (interface{}, *utils.HandlerError) {
-	return struct {
-		Message string `json:"message"`
-	}{
-		Message: "API server is running",
-	}, nil
-}
-
-func addRoutes(router *mux.Router) {
-	router.HandleFunc("/", makeHandler(mainHandler))
-
-	router.HandleFunc(
-		fmt.Sprintf("/transaction/id/{%s}", routeParamTxID),
-		makeHandler(getTransactionByIDHandler)).
-		Methods("GET")
-
-	router.HandleFunc(
-		fmt.Sprintf("/transaction/hash/{%s}", routeParamTxHash),
-		makeHandler(getTransactionByHashHandler)).
-		Methods("GET")
-
-	router.HandleFunc(
-		fmt.Sprintf("/transactions/address/{%s}", routeParamAddress),
-		makeHandler(getTransactionsByAddressHandler)).
-		Methods("GET")
-
-	router.HandleFunc(
-		fmt.Sprintf("/utxos/address/{%s}", routeParamAddress),
-		makeHandler(getUTXOsByAddressHandler)).
-		Methods("GET")
-
-	router.HandleFunc(
-		fmt.Sprintf("/block/{%s}", routeParamBlockHash),
-		makeHandler(getBlockByHashHandler)).
-		Methods("GET")
-
-	router.HandleFunc(
-		"/blocks",
-		makeHandler(getBlocksHandler)).
-		Methods("GET")
-
-	router.HandleFunc(
-		"/fee-estimates",
-		makeHandler(getFeeEstimatesHandler)).
-		Methods("GET")
-
-	router.HandleFunc(
-		"/transaction",
-		makeHandler(postTransactionHandler)).
-		Methods("POST")
-}
-
-func convertQueryParamToInt(queryParams map[string]string, param string, defaultValue int) (int, *utils.HandlerError) {
-	if _, ok := queryParams[param]; ok {
-		intValue, err := strconv.Atoi(queryParams[param])
-		if err != nil {
-			return 0, utils.NewHandlerError(http.StatusUnprocessableEntity, fmt.Sprintf("Couldn't parse the '%s' query parameter: %s", param, err))
-		}
-		return intValue, nil
-	}
-	return defaultValue, nil
-}
-
-func getTransactionByIDHandler(_ *utils.APIServerContext, routeParams map[string]string, _ map[string]string,
-	_ []byte) (interface{}, *utils.HandlerError) {
-
-	return controllers.GetTransactionByIDHandler(routeParams[routeParamTxID])
-}
-
-func getTransactionByHashHandler(_ *utils.APIServerContext, routeParams map[string]string, _ map[string]string,
-	_ []byte) (interface{}, *utils.HandlerError) {
-
-	return controllers.GetTransactionByHashHandler(routeParams[routeParamTxHash])
-}
-
-func getTransactionsByAddressHandler(_ *utils.APIServerContext, routeParams map[string]string, queryParams map[string]string,
-	_ []byte) (interface{}, *utils.HandlerError) {
-
-	skip, hErr := convertQueryParamToInt(queryParams, queryParamSkip, 0)
-	if hErr != nil {
-		return nil, hErr
-	}
-	limit, hErr := convertQueryParamToInt(queryParams, queryParamLimit, defaultGetTransactionsLimit)
-	if hErr != nil {
-		return nil, hErr
-	}
-	if _, ok := queryParams[queryParamLimit]; ok {
-		var err error
-		skip, err = strconv.Atoi(queryParams[queryParamLimit])
-		if err != nil {
-			return nil, utils.NewHandlerError(http.StatusUnprocessableEntity,
-				fmt.Sprintf("Couldn't parse the '%s' query parameter: %s", queryParamLimit, err))
-		}
-	}
-	return controllers.GetTransactionsByAddressHandler(routeParams[routeParamAddress], uint64(skip), uint64(limit))
-}
-
-func getUTXOsByAddressHandler(_ *utils.APIServerContext, routeParams map[string]string, _ map[string]string,
-	_ []byte) (interface{}, *utils.HandlerError) {
-
-	return controllers.GetUTXOsByAddressHandler(routeParams[routeParamAddress])
-}
-
-func getBlockByHashHandler(_ *utils.APIServerContext, routeParams map[string]string, _ map[string]string,
-	_ []byte) (interface{}, *utils.HandlerError) {
-
-	return controllers.GetBlockByHashHandler(routeParams[routeParamBlockHash])
-}
-
-func getFeeEstimatesHandler(_ *utils.APIServerContext, _ map[string]string, _ map[string]string,
-	_ []byte) (interface{}, *utils.HandlerError) {
-
-	return controllers.GetFeeEstimatesHandler()
-}
-
-func getBlocksHandler(_ *utils.APIServerContext, _ map[string]string, queryParams map[string]string,
-	_ []byte) (interface{}, *utils.HandlerError) {
-
-	skip, hErr := convertQueryParamToInt(queryParams, queryParamSkip, 0)
-	if hErr != nil {
-		return nil, hErr
-	}
-	limit, hErr := convertQueryParamToInt(queryParams, queryParamLimit, defaultGetBlocksLimit)
-	if hErr != nil {
-		return nil, hErr
-	}
-	order := defaultGetBlocksOrder
-	if orderParamValue, ok := queryParams[queryParamOrder]; ok {
-		if orderParamValue != controllers.OrderAscending && orderParamValue != controllers.OrderDescending {
-			return nil, utils.NewHandlerError(http.StatusUnprocessableEntity, fmt.Sprintf("'%s' is not a valid value for the '%s' query parameter", orderParamValue, queryParamLimit))
-		}
-		order = orderParamValue
-	}
-	return controllers.GetBlocksHandler(order, uint64(skip), uint64(limit))
-}
-
-func postTransactionHandler(_ *utils.APIServerContext, _ map[string]string, _ map[string]string,
-	requestBody []byte) (interface{}, *utils.HandlerError) {
-	return nil, controllers.PostTransaction(requestBody)
-}

apiserver/server/server.go

@@ -1,39 +0,0 @@
-package server
-
-import (
-	"context"
-	"net/http"
-	"time"
-
-	"github.com/gorilla/handlers"
-	"github.com/gorilla/mux"
-)
-
-const gracefulShutdownTimeout = 30 * time.Second
-
-// Start starts the HTTP REST server and returns a
-// function to gracefully shutdown it.
-func Start(listenAddr string) func() {
-	router := mux.NewRouter()
-	router.Use(addRequestMetadataMiddleware)
-	router.Use(recoveryMiddleware)
-	router.Use(loggingMiddleware)
-	router.Use(setJSONMiddleware)
-	addRoutes(router)
-	httpServer := &http.Server{
-		Addr:    listenAddr,
-		Handler: handlers.CORS()(router),
-	}
-	spawn(func() {
-		log.Errorf("%s", httpServer.ListenAndServe())
-	})
-
-	return func() {
-		ctx, cancel := context.WithTimeout(context.Background(), gracefulShutdownTimeout)
-		defer cancel()
-		err := httpServer.Shutdown(ctx)
-		if err != nil {
-			log.Errorf("Error shutting down HTTP server: %s", err)
-		}
-	}
-}

apiserver/sync.go

@@ -1,877 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"encoding/hex"
-	"fmt"
-	"github.com/daglabs/btcd/apiserver/config"
-	"github.com/daglabs/btcd/apiserver/database"
-	"github.com/daglabs/btcd/apiserver/jsonrpc"
-	"github.com/daglabs/btcd/apiserver/models"
-	"github.com/daglabs/btcd/apiserver/utils"
-	"github.com/daglabs/btcd/btcjson"
-	"github.com/daglabs/btcd/txscript"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/util/subnetworkid"
-	"github.com/jinzhu/gorm"
-	"strconv"
-	"time"
-)
-
-// startSync keeps the node and the API server in sync. On start, it downloads
-// all data that's missing from the API server, and once it's done it keeps
-// sync with the node via notifications.
-func startSync(doneChan chan struct{}) error {
-	client, err := jsonrpc.GetClient()
-	if err != nil {
-		return err
-	}
-
-	// Mass download missing data
-	err = fetchInitialData(client)
-	if err != nil {
-		return err
-	}
-
-	// Keep the node and the API server in sync
-	sync(client, doneChan)
-	return nil
-}
-
-// fetchInitialData downloads all data that's currently missing from
-// the database.
-func fetchInitialData(client *jsonrpc.Client) error {
-	err := syncBlocks(client)
-	if err != nil {
-		return err
-	}
-	err = syncSelectedParentChain(client)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// sync keeps the API server in sync with the node via notifications
-func sync(client *jsonrpc.Client, doneChan chan struct{}) {
-	// ChainChangedMsgs must be processed in order and there may be times
-	// when we may not be able to process them (e.g. appropriate
-	// BlockAddedMsgs haven't arrived yet). As such, we pop messages from
-	// client.OnChainChanged, make sure we're able to handle them, and
-	// only then push them into nextChainChangedChan for them to be
-	// actually handled.
-	blockAddedMsgHandledChan := make(chan struct{})
-	nextChainChangedChan := make(chan *jsonrpc.ChainChangedMsg)
-	spawn(func() {
-		for chainChanged := range client.OnChainChanged {
-			for {
-				<-blockAddedMsgHandledChan
-				canHandle, err := canHandleChainChangedMsg(chainChanged)
-				if err != nil {
-					panic(err)
-				}
-				if canHandle {
-					break
-				}
-			}
-			nextChainChangedChan <- chainChanged
-		}
-	})
-
-	// Handle client notifications until we're told to stop
-loop:
-	for {
-		select {
-		case blockAdded := <-client.OnBlockAdded:
-			handleBlockAddedMsg(client, blockAdded)
-			blockAddedMsgHandledChan <- struct{}{}
-		case chainChanged := <-nextChainChangedChan:
-			handleChainChangedMsg(chainChanged)
-		case <-doneChan:
-			log.Infof("startSync stopped")
-			break loop
-		}
-	}
-}
-
-// syncBlocks attempts to download all DAG blocks starting with
-// the bluest block, and then inserts them into the database.
-func syncBlocks(client *jsonrpc.Client) error {
-	// Start syncing from the bluest block hash. We use blue score to
-	// simulate the "last" block we have because blue-block order is
-	// the order that the node uses in the various JSONRPC calls.
-	startHash, err := findHashOfBluestBlock(false)
-	if err != nil {
-		return err
-	}
-
-	var blocks []string
-	var rawBlocks []btcjson.GetBlockVerboseResult
-	for {
-		blocksResult, err := client.GetBlocks(true, false, startHash)
-		if err != nil {
-			return err
-		}
-		if len(blocksResult.Hashes) == 0 {
-			break
-		}
-
-		rawBlocksResult, err := client.GetBlocks(true, true, startHash)
-		if err != nil {
-			return err
-		}
-
-		startHash = &blocksResult.Hashes[len(blocksResult.Hashes)-1]
-		blocks = append(blocks, blocksResult.Blocks...)
-		rawBlocks = append(rawBlocks, rawBlocksResult.RawBlocks...)
-	}
-
-	return addBlocks(client, blocks, rawBlocks)
-}
-
-// syncSelectedParentChain attempts to download the selected parent
-// chain starting with the bluest chain-block, and then updates the
-// database accordingly.
-func syncSelectedParentChain(client *jsonrpc.Client) error {
-	// Start syncing from the bluest chain-block hash. We use blue
-	// score to simulate the "last" block we have because blue-block
-	// order is the order that the node uses in the various JSONRPC
-	// calls.
-	startHash, err := findHashOfBluestBlock(true)
-	if err != nil {
-		return err
-	}
-
-	for {
-		chainFromBlockResult, err := client.GetChainFromBlock(false, startHash)
-		if err != nil {
-			return err
-		}
-		if len(chainFromBlockResult.AddedChainBlocks) == 0 {
-			break
-		}
-
-		startHash = &chainFromBlockResult.AddedChainBlocks[len(chainFromBlockResult.AddedChainBlocks)-1].Hash
-		err = updateSelectedParentChain(chainFromBlockResult.RemovedChainBlockHashes,
-			chainFromBlockResult.AddedChainBlocks)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// findHashOfBluestBlock finds the block with the highest
-// blue score in the database. If the database is empty,
-// return nil.
-func findHashOfBluestBlock(mustBeChainBlock bool) (*string, error) {
-	dbTx, err := database.DB()
-	if err != nil {
-		return nil, err
-	}
-
-	var block models.Block
-	dbQuery := dbTx.Order("blue_score DESC")
-	if mustBeChainBlock {
-		dbQuery = dbQuery.Where(&models.Block{IsChainBlock: true})
-	}
-	dbResult := dbQuery.First(&block)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewErrorFromDBErrors("failed to find hash of bluest block: ", dbErrors)
-	}
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		return nil, nil
-	}
-	return &block.BlockHash, nil
-}
-
-// fetchBlock downloads the serialized block and raw block data of
-// the block with hash blockHash.
-func fetchBlock(client *jsonrpc.Client, blockHash *daghash.Hash) (
-	block string, rawBlock *btcjson.GetBlockVerboseResult, err error) {
-	msgBlock, err := client.GetBlock(blockHash, nil)
-	if err != nil {
-		return "", nil, err
-	}
-	writer := bytes.NewBuffer(make([]byte, 0, msgBlock.SerializeSize()))
-	err = msgBlock.Serialize(writer)
-	if err != nil {
-		return "", nil, err
-	}
-	block = hex.EncodeToString(writer.Bytes())
-
-	rawBlock, err = client.GetBlockVerboseTx(blockHash, nil)
-	if err != nil {
-		return "", nil, err
-	}
-	return block, rawBlock, nil
-}
-
-// addBlocks inserts data in the given blocks and rawBlocks pairwise
-// into the database. See addBlock for further details.
-func addBlocks(client *jsonrpc.Client, blocks []string, rawBlocks []btcjson.GetBlockVerboseResult) error {
-	for i, rawBlock := range rawBlocks {
-		block := blocks[i]
-		err := addBlock(client, block, rawBlock)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func doesBlockExist(dbTx *gorm.DB, blockHash string) (bool, error) {
-	var dbBlock models.Block
-	dbResult := dbTx.
-		Where(&models.Block{BlockHash: blockHash}).
-		First(&dbBlock)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return false, utils.NewErrorFromDBErrors("failed to find block: ", dbErrors)
-	}
-	return !utils.IsDBRecordNotFoundError(dbErrors), nil
-}
-
-// addBlocks inserts all the data that could be gleaned out of the serialized
-// block and raw block data into the database. This includes transactions,
-// subnetworks, and addresses.
-// Note that if this function may take a nil dbTx, in which case it would start
-// a database transaction by itself and commit it before returning.
-func addBlock(client *jsonrpc.Client, block string, rawBlock btcjson.GetBlockVerboseResult) error {
-	db, err := database.DB()
-	if err != nil {
-		return err
-	}
-	dbTx := db.Begin()
-
-	// Skip this block if it already exists.
-	blockExists, err := doesBlockExist(dbTx, rawBlock.Hash)
-	if err != nil {
-		return err
-	}
-	if blockExists {
-		dbTx.Commit()
-		return nil
-	}
-
-	dbBlock, err := insertBlock(dbTx, rawBlock)
-	if err != nil {
-		return err
-	}
-	err = insertBlockParents(dbTx, rawBlock, dbBlock)
-	if err != nil {
-		return err
-	}
-	err = insertBlockData(dbTx, block, dbBlock)
-	if err != nil {
-		return err
-	}
-
-	for i, transaction := range rawBlock.RawTx {
-		dbSubnetwork, err := insertSubnetwork(dbTx, &transaction, client)
-		if err != nil {
-			return err
-		}
-		dbTransaction, err := insertTransaction(dbTx, &transaction, dbSubnetwork)
-		if err != nil {
-			return err
-		}
-		err = insertTransactionBlock(dbTx, dbBlock, dbTransaction, uint32(i))
-		if err != nil {
-			return err
-		}
-		err = insertTransactionInputs(dbTx, &transaction, dbTransaction)
-		if err != nil {
-			return err
-		}
-		err = insertTransactionOutputs(dbTx, &transaction, dbTransaction)
-		if err != nil {
-			return err
-		}
-	}
-
-	dbTx.Commit()
-	return nil
-}
-
-func insertBlock(dbTx *gorm.DB, rawBlock btcjson.GetBlockVerboseResult) (*models.Block, error) {
-	bits, err := strconv.ParseUint(rawBlock.Bits, 16, 32)
-	if err != nil {
-		return nil, err
-	}
-	dbBlock := models.Block{
-		BlockHash:            rawBlock.Hash,
-		Version:              rawBlock.Version,
-		HashMerkleRoot:       rawBlock.HashMerkleRoot,
-		AcceptedIDMerkleRoot: rawBlock.AcceptedIDMerkleRoot,
-		UTXOCommitment:       rawBlock.UTXOCommitment,
-		Timestamp:            time.Unix(rawBlock.Time, 0),
-		Bits:                 uint32(bits),
-		Nonce:                rawBlock.Nonce,
-		BlueScore:            rawBlock.BlueScore,
-		IsChainBlock:         false, // This must be false for updateSelectedParentChain to work properly
-		Mass:                 rawBlock.Mass,
-	}
-	dbResult := dbTx.Create(&dbBlock)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewErrorFromDBErrors("failed to insert block: ", dbErrors)
-	}
-	return &dbBlock, nil
-}
-
-func insertBlockParents(dbTx *gorm.DB, rawBlock btcjson.GetBlockVerboseResult, dbBlock *models.Block) error {
-	// Exit early if this is the genesis block
-	if len(rawBlock.ParentHashes) == 0 {
-		return nil
-	}
-
-	dbWhereBlockIDsIn := make([]*models.Block, len(rawBlock.ParentHashes))
-	for i, parentHash := range rawBlock.ParentHashes {
-		dbWhereBlockIDsIn[i] = &models.Block{BlockHash: parentHash}
-	}
-	var dbParents []models.Block
-	dbResult := dbTx.
-		Where(dbWhereBlockIDsIn).
-		First(&dbParents)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to find blocks: ", dbErrors)
-	}
-	if len(dbParents) != len(rawBlock.ParentHashes) {
-		return fmt.Errorf("some parents are missing for block: %s", rawBlock.Hash)
-	}
-
-	for _, dbParent := range dbParents {
-		dbParentBlock := models.ParentBlock{
-			BlockID:       dbBlock.ID,
-			ParentBlockID: dbParent.ID,
-		}
-		dbResult := dbTx.Create(&dbParentBlock)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return utils.NewErrorFromDBErrors("failed to insert parentBlock: ", dbErrors)
-		}
-	}
-	return nil
-}
-
-func insertBlockData(dbTx *gorm.DB, block string, dbBlock *models.Block) error {
-	blockData, err := hex.DecodeString(block)
-	if err != nil {
-		return err
-	}
-	dbRawBlock := models.RawBlock{
-		BlockID:   dbBlock.ID,
-		BlockData: blockData,
-	}
-	dbResult := dbTx.Create(&dbRawBlock)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to insert rawBlock: ", dbErrors)
-	}
-	return nil
-}
-
-func insertSubnetwork(dbTx *gorm.DB, transaction *btcjson.TxRawResult, client *jsonrpc.Client) (*models.Subnetwork, error) {
-	var dbSubnetwork models.Subnetwork
-	dbResult := dbTx.
-		Where(&models.Subnetwork{SubnetworkID: transaction.Subnetwork}).
-		First(&dbSubnetwork)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewErrorFromDBErrors("failed to find subnetwork: ", dbErrors)
-	}
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		subnetwork, err := client.GetSubnetwork(transaction.Subnetwork)
-		if err != nil {
-			return nil, err
-		}
-		dbSubnetwork = models.Subnetwork{
-			SubnetworkID: transaction.Subnetwork,
-			GasLimit:     subnetwork.GasLimit,
-		}
-		dbResult := dbTx.Create(&dbSubnetwork)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return nil, utils.NewErrorFromDBErrors("failed to insert subnetwork: ", dbErrors)
-		}
-	}
-	return &dbSubnetwork, nil
-}
-
-func insertTransaction(dbTx *gorm.DB, transaction *btcjson.TxRawResult, dbSubnetwork *models.Subnetwork) (*models.Transaction, error) {
-	var dbTransaction models.Transaction
-	dbResult := dbTx.
-		Where(&models.Transaction{TransactionID: transaction.TxID}).
-		First(&dbTransaction)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewErrorFromDBErrors("failed to find transaction: ", dbErrors)
-	}
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		payload, err := hex.DecodeString(transaction.Payload)
-		if err != nil {
-			return nil, err
-		}
-		dbTransaction = models.Transaction{
-			TransactionHash: transaction.Hash,
-			TransactionID:   transaction.TxID,
-			LockTime:        transaction.LockTime,
-			SubnetworkID:    dbSubnetwork.ID,
-			Gas:             transaction.Gas,
-			Mass:            transaction.Mass,
-			PayloadHash:     transaction.PayloadHash,
-			Payload:         payload,
-		}
-		dbResult := dbTx.Create(&dbTransaction)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return nil, utils.NewErrorFromDBErrors("failed to insert transaction: ", dbErrors)
-		}
-	}
-	return &dbTransaction, nil
-}
-
-func insertTransactionBlock(dbTx *gorm.DB, dbBlock *models.Block, dbTransaction *models.Transaction, index uint32) error {
-	var dbTransactionBlock models.TransactionBlock
-	dbResult := dbTx.
-		Where(&models.TransactionBlock{TransactionID: dbTransaction.ID, BlockID: dbBlock.ID}).
-		First(&dbTransactionBlock)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to find transactionBlock: ", dbErrors)
-	}
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		dbTransactionBlock = models.TransactionBlock{
-			TransactionID: dbTransaction.ID,
-			BlockID:       dbBlock.ID,
-			Index:         index,
-		}
-		dbResult := dbTx.Create(&dbTransactionBlock)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return utils.NewErrorFromDBErrors("failed to insert transactionBlock: ", dbErrors)
-		}
-	}
-	return nil
-}
-
-func insertTransactionInputs(dbTx *gorm.DB, transaction *btcjson.TxRawResult, dbTransaction *models.Transaction) error {
-	isCoinbase, err := isTransactionCoinbase(transaction)
-	if err != nil {
-		return err
-	}
-
-	if !isCoinbase {
-		for _, input := range transaction.Vin {
-			err := insertTransactionInput(dbTx, dbTransaction, &input)
-			if err != nil {
-				return err
-			}
-		}
-	}
-
-	return nil
-}
-
-func isTransactionCoinbase(transaction *btcjson.TxRawResult) (bool, error) {
-	subnetwork, err := subnetworkid.NewFromStr(transaction.Subnetwork)
-	if err != nil {
-		return false, err
-	}
-	return subnetwork.IsEqual(subnetworkid.SubnetworkIDCoinbase), nil
-}
-
-func insertTransactionInput(dbTx *gorm.DB, dbTransaction *models.Transaction, input *btcjson.Vin) error {
-	var dbPreviousTransactionOutput models.TransactionOutput
-	dbResult := dbTx.
-		Joins("LEFT JOIN `transactions` ON `transactions`.`id` = `transaction_outputs`.`transaction_id`").
-		Where("`transactions`.`transactiond_id` = ? AND `transaction_outputs`.`index` = ?", input.TxID, input.Vout).
-		First(&dbPreviousTransactionOutput)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to find previous transactionOutput: ", dbErrors)
-	}
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		return fmt.Errorf("missing output transaction output for txID: %s and index: %d", input.TxID, input.Vout)
-	}
-
-	var dbTransactionInputCount int
-	dbResult = dbTx.
-		Model(&models.TransactionInput{}).
-		Where(&models.TransactionInput{TransactionID: dbTransaction.ID, PreviousTransactionOutputID: dbPreviousTransactionOutput.ID}).
-		Count(&dbTransactionInputCount)
-	dbErrors = dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to find transactionInput: ", dbErrors)
-	}
-	if dbTransactionInputCount == 0 {
-		scriptSig, err := hex.DecodeString(input.ScriptSig.Hex)
-		if err != nil {
-			return nil
-		}
-		dbTransactionInput := models.TransactionInput{
-			TransactionID:               dbTransaction.ID,
-			PreviousTransactionOutputID: dbPreviousTransactionOutput.ID,
-			Index:                       input.Vout,
-			SignatureScript:             scriptSig,
-			Sequence:                    input.Sequence,
-		}
-		dbResult := dbTx.Create(&dbTransactionInput)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return utils.NewErrorFromDBErrors("failed to insert transactionInput: ", dbErrors)
-		}
-	}
-
-	return nil
-}
-
-func insertTransactionOutputs(dbTx *gorm.DB, transaction *btcjson.TxRawResult, dbTransaction *models.Transaction) error {
-	for _, output := range transaction.Vout {
-		scriptPubKey, err := hex.DecodeString(output.ScriptPubKey.Hex)
-		if err != nil {
-			return err
-		}
-		dbAddress, err := insertAddress(dbTx, scriptPubKey)
-		if err != nil {
-			return err
-		}
-		err = insertTransactionOutput(dbTx, dbTransaction, &output, scriptPubKey, dbAddress)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func insertAddress(dbTx *gorm.DB, scriptPubKey []byte) (*models.Address, error) {
-	_, addr, err := txscript.ExtractScriptPubKeyAddress(scriptPubKey, config.ActiveNetParams())
-	if err != nil {
-		return nil, err
-	}
-	hexAddress := addr.EncodeAddress()
-
-	var dbAddress models.Address
-	dbResult := dbTx.
-		Where(&models.Address{Address: hexAddress}).
-		First(&dbAddress)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return nil, utils.NewErrorFromDBErrors("failed to find address: ", dbErrors)
-	}
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		dbAddress = models.Address{
-			Address: hexAddress,
-		}
-		dbResult := dbTx.Create(&dbAddress)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return nil, utils.NewErrorFromDBErrors("failed to insert address: ", dbErrors)
-		}
-	}
-	return &dbAddress, nil
-}
-
-func insertTransactionOutput(dbTx *gorm.DB, dbTransaction *models.Transaction,
-	output *btcjson.Vout, scriptPubKey []byte, dbAddress *models.Address) error {
-	var dbTransactionOutputCount int
-	dbResult := dbTx.
-		Model(&models.TransactionOutput{}).
-		Where(&models.TransactionOutput{TransactionID: dbTransaction.ID, Index: output.N}).
-		Count(&dbTransactionOutputCount)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to find transactionOutput: ", dbErrors)
-	}
-	if dbTransactionOutputCount == 0 {
-		dbTransactionOutput := models.TransactionOutput{
-			TransactionID: dbTransaction.ID,
-			Index:         output.N,
-			Value:         output.Value,
-			IsSpent:       false, // This must be false for updateSelectedParentChain to work properly
-			ScriptPubKey:  scriptPubKey,
-			AddressID:     dbAddress.ID,
-		}
-		dbResult := dbTx.Create(&dbTransactionOutput)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return utils.NewErrorFromDBErrors("failed to insert transactionOutput: ", dbErrors)
-		}
-	}
-	return nil
-}
-
-// updateSelectedParentChain updates the database to reflect the current selected
-// parent chain. First it "unaccepts" all removedChainHashes and then it "accepts"
-// all addChainBlocks.
-// Note that if this function may take a nil dbTx, in which case it would start
-// a database transaction by itself and commit it before returning.
-func updateSelectedParentChain(removedChainHashes []string, addedChainBlocks []btcjson.ChainBlock) error {
-	db, err := database.DB()
-	if err != nil {
-		return err
-	}
-	dbTx := db.Begin()
-
-	for _, removedHash := range removedChainHashes {
-		err := updateRemovedChainHashes(dbTx, removedHash)
-		if err != nil {
-			return err
-		}
-	}
-	for _, addedBlock := range addedChainBlocks {
-		err := updateAddedChainBlocks(dbTx, &addedBlock)
-		if err != nil {
-			return err
-		}
-	}
-
-	dbTx.Commit()
-	return nil
-}
-
-// updateRemovedChainHashes "unaccepts" the block of the given removedHash.
-// That is to say, it marks it as not in the selected parent chain in the
-// following ways:
-// * All its TransactionInputs.PreviousTransactionOutputs are set IsSpent = false
-// * All its Transactions are set AcceptingBlockID = nil
-// * The block is set IsChainBlock = false
-// This function will return an error if any of the above are in an unexpected state
-func updateRemovedChainHashes(dbTx *gorm.DB, removedHash string) error {
-	var dbBlock models.Block
-	dbResult := dbTx.
-		Where(&models.Block{BlockHash: removedHash}).
-		First(&dbBlock)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to find block: ", dbErrors)
-	}
-	if utils.IsDBRecordNotFoundError(dbErrors) {
-		return fmt.Errorf("missing block for hash: %s", removedHash)
-	}
-	if !dbBlock.IsChainBlock {
-		return fmt.Errorf("block erroneously marked as not a chain block: %s", removedHash)
-	}
-
-	var dbTransactions []models.Transaction
-	dbResult = dbTx.
-		Where(&models.Transaction{AcceptingBlockID: &dbBlock.ID}).
-		Preload("TransactionInputs.PreviousTransactionOutput").
-		Find(&dbTransactions)
-	dbErrors = dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to find transactions: ", dbErrors)
-	}
-	for _, dbTransaction := range dbTransactions {
-		for _, dbTransactionInput := range dbTransaction.TransactionInputs {
-			dbPreviousTransactionOutput := dbTransactionInput.PreviousTransactionOutput
-			if !dbPreviousTransactionOutput.IsSpent {
-				return fmt.Errorf("cannot de-spend an unspent transaction output: %s index: %d",
-					dbTransaction.TransactionID, dbTransactionInput.Index)
-			}
-
-			dbPreviousTransactionOutput.IsSpent = false
-			dbResult = dbTx.Save(&dbPreviousTransactionOutput)
-			dbErrors = dbResult.GetErrors()
-			if utils.HasDBError(dbErrors) {
-				return utils.NewErrorFromDBErrors("failed to update transactionOutput: ", dbErrors)
-			}
-		}
-
-		dbTransaction.AcceptingBlockID = nil
-		dbResult := dbTx.Save(&dbTransaction)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return utils.NewErrorFromDBErrors("failed to update transaction: ", dbErrors)
-		}
-	}
-
-	dbBlock.IsChainBlock = false
-	dbResult = dbTx.Save(&dbBlock)
-	dbErrors = dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return utils.NewErrorFromDBErrors("failed to update block: ", dbErrors)
-	}
-
-	return nil
-}
-
-// updateAddedChainBlocks "accepts" the given addedBlock. That is to say,
-// it marks it as in the selected parent chain in the following ways:
-// * All its TransactionInputs.PreviousTransactionOutputs are set IsSpent = true
-// * All its Transactions are set AcceptingBlockID = addedBlock
-// * The block is set IsChainBlock = true
-// This function will return an error if any of the above are in an unexpected state
-func updateAddedChainBlocks(dbTx *gorm.DB, addedBlock *btcjson.ChainBlock) error {
-	for _, acceptedBlock := range addedBlock.AcceptedBlocks {
-		var dbAccepedBlock models.Block
-		dbResult := dbTx.
-			Where(&models.Block{BlockHash: acceptedBlock.Hash}).
-			First(&dbAccepedBlock)
-		dbErrors := dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return utils.NewErrorFromDBErrors("failed to find block: ", dbErrors)
-		}
-		if utils.IsDBRecordNotFoundError(dbErrors) {
-			return fmt.Errorf("missing block for hash: %s", acceptedBlock.Hash)
-		}
-		if dbAccepedBlock.IsChainBlock {
-			return fmt.Errorf("block erroneously marked as a chain block: %s", acceptedBlock.Hash)
-		}
-
-		dbWhereTransactionIDsIn := make([]*models.Transaction, len(acceptedBlock.AcceptedTxIDs))
-		for i, acceptedTxID := range acceptedBlock.AcceptedTxIDs {
-			dbWhereTransactionIDsIn[i] = &models.Transaction{TransactionID: acceptedTxID}
-		}
-		var dbAcceptedTransactions []models.Transaction
-		dbResult = dbTx.
-			Where(dbWhereTransactionIDsIn).
-			Preload("TransactionInputs.PreviousTransactionOutput").
-			First(&dbAcceptedTransactions)
-		dbErrors = dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return utils.NewErrorFromDBErrors("failed to find transactions: ", dbErrors)
-		}
-		if len(dbAcceptedTransactions) != len(acceptedBlock.AcceptedTxIDs) {
-			return fmt.Errorf("some transaction are missing for block: %s", acceptedBlock.Hash)
-		}
-
-		for _, dbAcceptedTransaction := range dbAcceptedTransactions {
-			for _, dbTransactionInput := range dbAcceptedTransaction.TransactionInputs {
-				dbPreviousTransactionOutput := dbTransactionInput.PreviousTransactionOutput
-				if dbPreviousTransactionOutput.IsSpent {
-					return fmt.Errorf("cannot spend an already spent transaction output: %s index: %d",
-						dbAcceptedTransaction.TransactionID, dbTransactionInput.Index)
-				}
-
-				dbPreviousTransactionOutput.IsSpent = true
-				dbResult = dbTx.Save(&dbPreviousTransactionOutput)
-				dbErrors = dbResult.GetErrors()
-				if utils.HasDBError(dbErrors) {
-					return utils.NewErrorFromDBErrors("failed to update transactionOutput: ", dbErrors)
-				}
-			}
-
-			dbAcceptedTransaction.AcceptingBlockID = &dbAccepedBlock.ID
-			dbResult = dbTx.Save(&dbAcceptedTransaction)
-			dbErrors = dbResult.GetErrors()
-			if utils.HasDBError(dbErrors) {
-				return utils.NewErrorFromDBErrors("failed to update transaction: ", dbErrors)
-			}
-		}
-
-		dbAccepedBlock.IsChainBlock = true
-		dbResult = dbTx.Save(&dbAccepedBlock)
-		dbErrors = dbResult.GetErrors()
-		if utils.HasDBError(dbErrors) {
-			return utils.NewErrorFromDBErrors("failed to update block: ", dbErrors)
-		}
-	}
-	return nil
-}
-
-// handleBlockAddedMsg handles onBlockAdded messages
-func handleBlockAddedMsg(client *jsonrpc.Client, blockAdded *jsonrpc.BlockAddedMsg) {
-	hash := blockAdded.Header.BlockHash()
-	block, rawBlock, err := fetchBlock(client, hash)
-	if err != nil {
-		log.Warnf("Could not fetch block %s: %s", hash, err)
-		return
-	}
-	err = addBlock(client, block, *rawBlock)
-	if err != nil {
-		log.Warnf("Could not insert block %s: %s", hash, err)
-		return
-	}
-	log.Infof("Added block %s", hash)
-}
-
-// canHandleChainChangedMsg checks whether we have all the necessary data
-// to successfully handle a ChainChangedMsg.
-func canHandleChainChangedMsg(chainChanged *jsonrpc.ChainChangedMsg) (bool, error) {
-	dbTx, err := database.DB()
-	if err != nil {
-		return false, err
-	}
-
-	// Collect all unique referenced block hashes
-	hashes := make(map[string]struct{})
-	for _, removedHash := range chainChanged.RemovedChainBlockHashes {
-		hashes[removedHash.String()] = struct{}{}
-	}
-	for _, addedBlock := range chainChanged.AddedChainBlocks {
-		hashes[addedBlock.Hash.String()] = struct{}{}
-		for _, acceptedBlock := range addedBlock.AcceptedBlocks {
-			hashes[acceptedBlock.Hash.String()] = struct{}{}
-		}
-	}
-
-	// Make sure that all the hashes exist in the database
-	dbWhereBlockHashesIn := make([]*models.Block, len(hashes))
-	i := 0
-	for hash := range hashes {
-		dbWhereBlockHashesIn[i] = &models.Block{BlockHash: hash}
-		i++
-	}
-	var dbBlocksCount int
-	dbResult := dbTx.
-		Where(dbWhereBlockHashesIn).
-		Count(&dbBlocksCount)
-	dbErrors := dbResult.GetErrors()
-	if utils.HasDBError(dbErrors) {
-		return false, utils.NewErrorFromDBErrors("failed to find block count: ", dbErrors)
-	}
-	if len(hashes) != dbBlocksCount {
-		return false, nil
-	}
-
-	return true, nil
-}
-
-// handleChainChangedMsg handles onChainChanged messages
-func handleChainChangedMsg(chainChanged *jsonrpc.ChainChangedMsg) {
-	// Convert the data in chainChanged to something we can feed into
-	// updateSelectedParentChain
-	removedHashes, addedBlocks := convertChainChangedMsg(chainChanged)
-
-	err := updateSelectedParentChain(removedHashes, addedBlocks)
-	if err != nil {
-		log.Warnf("Could not update selected parent chain: %s", err)
-		return
-	}
-	log.Infof("Chain changed: removed &d blocks and added %d block",
-		len(removedHashes), len(addedBlocks))
-}
-
-func convertChainChangedMsg(chainChanged *jsonrpc.ChainChangedMsg) (
-	removedHashes []string, addedBlocks []btcjson.ChainBlock) {
-
-	removedHashes = make([]string, len(chainChanged.RemovedChainBlockHashes))
-	for i, hash := range chainChanged.RemovedChainBlockHashes {
-		removedHashes[i] = hash.String()
-	}
-
-	addedBlocks = make([]btcjson.ChainBlock, len(chainChanged.AddedChainBlocks))
-	for i, addedBlock := range chainChanged.AddedChainBlocks {
-		acceptedBlocks := make([]btcjson.AcceptedBlock, len(addedBlock.AcceptedBlocks))
-		for j, acceptedBlock := range addedBlock.AcceptedBlocks {
-			acceptedTxIDs := make([]string, len(acceptedBlock.AcceptedTxIDs))
-			for k, acceptedTxID := range acceptedBlock.AcceptedTxIDs {
-				acceptedTxIDs[k] = acceptedTxID.String()
-			}
-			acceptedBlocks[j] = btcjson.AcceptedBlock{
-				Hash:          acceptedBlock.Hash.String(),
-				AcceptedTxIDs: acceptedTxIDs,
-			}
-		}
-		addedBlocks[i] = btcjson.ChainBlock{
-			Hash:           addedBlock.Hash.String(),
-			AcceptedBlocks: acceptedBlocks,
-		}
-	}
-
-	return removedHashes, addedBlocks
-}

apiserver/utils/context.go

@@ -1,79 +0,0 @@
-package utils
-
-import (
-	"context"
-	"fmt"
-)
-
-type contextKey string
-
-const (
-	contextKeyRequestID contextKey = "REQUEST_ID"
-)
-
-// APIServerContext is a context.Context wrapper that
-// enables custom logs with request ID.
-type APIServerContext struct {
-	context.Context
-}
-
-// ToAPIServerContext takes a context.Context instance
-// and converts it to *ApiServerContext.
-func ToAPIServerContext(ctx context.Context) *APIServerContext {
-	if asCtx, ok := ctx.(*APIServerContext); ok {
-		return asCtx
-	}
-	return &APIServerContext{Context: ctx}
-}
-
-// SetRequestID associates a request ID for the context.
-func (ctx *APIServerContext) SetRequestID(requestID uint64) context.Context {
-	context.WithValue(ctx, contextKeyRequestID, requestID)
-	return ctx
-}
-
-func (ctx *APIServerContext) requestID() uint64 {
-	id := ctx.Value(contextKeyRequestID)
-	uint64ID, _ := id.(uint64)
-	return uint64ID
-}
-
-func (ctx *APIServerContext) getLogString(format string, params ...interface{}) string {
-	return fmt.Sprintf("RID %d: ", ctx.requestID()) + fmt.Sprintf(format, params...)
-}
-
-// Tracef writes a customized formatted context
-// related log with log level 'Trace'.
-func (ctx *APIServerContext) Tracef(format string, params ...interface{}) {
-	log.Trace(ctx.getLogString(format, params...))
-}
-
-// Debugf writes a customized formatted context
-// related log with log level 'Debug'.
-func (ctx *APIServerContext) Debugf(format string, params ...interface{}) {
-	log.Debug(ctx.getLogString(format, params...))
-}
-
-// Infof writes a customized formatted context
-// related log with log level 'Info'.
-func (ctx *APIServerContext) Infof(format string, params ...interface{}) {
-	log.Info(ctx.getLogString(format, params...))
-}
-
-// Warnf writes a customized formatted context
-// related log with log level 'Warn'.
-func (ctx *APIServerContext) Warnf(format string, params ...interface{}) {
-	log.Warn(ctx.getLogString(format, params...))
-}
-
-// Errorf writes a customized formatted context
-// related log with log level 'Error'.
-func (ctx *APIServerContext) Errorf(format string, params ...interface{}) {
-	log.Error(ctx.getLogString(format, params...))
-}
-
-// Criticalf writes a customized formatted context
-// related log with log level 'Critical'.
-func (ctx *APIServerContext) Criticalf(format string, params ...interface{}) {
-	log.Criticalf(ctx.getLogString(format, params...))
-}

apiserver/utils/error.go

@@ -1,74 +0,0 @@
-package utils
-
-import (
-	"fmt"
-	"github.com/jinzhu/gorm"
-	"net/http"
-	"strings"
-)
-
-// HandlerError is an error returned from
-// a rest route handler or a middleware.
-type HandlerError struct {
-	Code          int
-	Message       string
-	ClientMessage string
-}
-
-func (hErr *HandlerError) Error() string {
-	return hErr.Message
-}
-
-// NewHandlerError returns a HandlerError with the given code and message.
-func NewHandlerError(code int, message string) *HandlerError {
-	return &HandlerError{
-		Code:          code,
-		Message:       message,
-		ClientMessage: message,
-	}
-}
-
-// NewHandlerErrorWithCustomClientMessage returns a HandlerError with
-// the given code, message and client error message.
-func NewHandlerErrorWithCustomClientMessage(code int, message, clientMessage string) *HandlerError {
-	return &HandlerError{
-		Code:          code,
-		Message:       message,
-		ClientMessage: clientMessage,
-	}
-}
-
-// NewInternalServerHandlerError returns a HandlerError with
-// the given message, and the http.StatusInternalServerError
-// status text as client message.
-func NewInternalServerHandlerError(message string) *HandlerError {
-	return NewHandlerErrorWithCustomClientMessage(http.StatusInternalServerError, message, http.StatusText(http.StatusInternalServerError))
-}
-
-// NewErrorFromDBErrors takes a slice of database errors and a prefix, and
-// returns an error with all of the database errors formatted to one string with
-// the given prefix
-func NewErrorFromDBErrors(prefix string, dbErrors []error) error {
-	dbErrorsStrings := make([]string, len(dbErrors))
-	for i, dbErr := range dbErrors {
-		dbErrorsStrings[i] = fmt.Sprintf("\"%s\"", dbErr)
-	}
-	return fmt.Errorf("%s [%s]", prefix, strings.Join(dbErrorsStrings, ","))
-}
-
-// NewHandlerErrorFromDBErrors takes a slice of database errors and a prefix, and
-// returns an HandlerError with error code http.StatusInternalServerError with
-// all of the database errors formatted to one string with the given prefix
-func NewHandlerErrorFromDBErrors(prefix string, dbErrors []error) *HandlerError {
-	return NewInternalServerHandlerError(NewErrorFromDBErrors(prefix, dbErrors).Error())
-}
-
-// IsDBRecordNotFoundError returns true if the given dbErrors contains only a RecordNotFound error
-func IsDBRecordNotFoundError(dbErrors []error) bool {
-	return len(dbErrors) == 1 && gorm.IsRecordNotFoundError(dbErrors[0])
-}
-
-// HasDBError returns true if the given dbErrors contain any errors that aren't RecordNotFound
-func HasDBError(dbErrors []error) bool {
-	return !IsDBRecordNotFoundError(dbErrors) && len(dbErrors) > 0
-}

apiserver/utils/log.go

@@ -1,9 +0,0 @@
-package utils
-
-import "github.com/daglabs/btcd/util/panics"
-import "github.com/daglabs/btcd/apiserver/logger"
-
-var (
-	log   = logger.BackendLog.Logger("UTIL")
-	spawn = panics.GoroutineWrapperFunc(log, logger.BackendLog)
-)

app/app.go

@@ -0,0 +1,247 @@
+package app
+
+import (
+	"fmt"
+	"sync/atomic"
+
+	"github.com/kaspanet/kaspad/network/addressmanager"
+
+	"github.com/kaspanet/kaspad/network/netadapter/id"
+
+	"github.com/kaspanet/kaspad/domain/blockdag"
+	"github.com/kaspanet/kaspad/domain/blockdag/indexers"
+	"github.com/kaspanet/kaspad/domain/mempool"
+	"github.com/kaspanet/kaspad/domain/mining"
+	"github.com/kaspanet/kaspad/domain/txscript"
+	"github.com/kaspanet/kaspad/infrastructure/config"
+	"github.com/kaspanet/kaspad/infrastructure/dbaccess"
+	"github.com/kaspanet/kaspad/infrastructure/signal"
+	"github.com/kaspanet/kaspad/network/connmanager"
+	"github.com/kaspanet/kaspad/network/dnsseed"
+	"github.com/kaspanet/kaspad/network/domainmessage"
+	"github.com/kaspanet/kaspad/network/netadapter"
+	"github.com/kaspanet/kaspad/network/protocol"
+	"github.com/kaspanet/kaspad/network/rpc"
+	"github.com/kaspanet/kaspad/util"
+	"github.com/kaspanet/kaspad/util/panics"
+)
+
+// App is a wrapper for all the kaspad services
+type App struct {
+	cfg               *config.Config
+	rpcServer         *rpc.Server
+	addressManager    *addressmanager.AddressManager
+	protocolManager   *protocol.Manager
+	connectionManager *connmanager.ConnectionManager
+	netAdapter        *netadapter.NetAdapter
+
+	started, shutdown int32
+}
+
+// Start launches all the kaspad services.
+func (a *App) Start() {
+	// Already started?
+	if atomic.AddInt32(&a.started, 1) != 1 {
+		return
+	}
+
+	log.Trace("Starting kaspad")
+
+	err := a.protocolManager.Start()
+	if err != nil {
+		panics.Exit(log, fmt.Sprintf("Error starting the p2p protocol: %+v", err))
+	}
+
+	a.maybeSeedFromDNS()
+
+	a.connectionManager.Start()
+
+	if !a.cfg.DisableRPC {
+		a.rpcServer.Start()
+	}
+}
+
+// Stop gracefully shuts down all the kaspad services.
+func (a *App) Stop() {
+	// Make sure this only happens once.
+	if atomic.AddInt32(&a.shutdown, 1) != 1 {
+		log.Infof("Kaspad is already in the process of shutting down")
+		return
+	}
+
+	log.Warnf("Kaspad shutting down")
+
+	a.connectionManager.Stop()
+
+	err := a.protocolManager.Stop()
+	if err != nil {
+		log.Errorf("Error stopping the p2p protocol: %+v", err)
+	}
+
+	// Shutdown the RPC server if it's not disabled.
+	if !a.cfg.DisableRPC {
+		err := a.rpcServer.Stop()
+		if err != nil {
+			log.Errorf("Error stopping rpcServer: %+v", err)
+		}
+	}
+
+	err = a.addressManager.Stop()
+	if err != nil {
+		log.Errorf("Error stopping address manager: %s", err)
+	}
+
+	return
+}
+
+// New returns a new App instance configured to listen on addr for the
+// kaspa network type specified by dagParams. Use start to begin accepting
+// connections from peers.
+func New(cfg *config.Config, databaseContext *dbaccess.DatabaseContext, interrupt <-chan struct{}) (*App, error) {
+	indexManager, acceptanceIndex := setupIndexes(cfg)
+
+	sigCache := txscript.NewSigCache(cfg.SigCacheMaxSize)
+
+	// Create a new block DAG instance with the appropriate configuration.
+	dag, err := setupDAG(cfg, databaseContext, interrupt, sigCache, indexManager)
+	if err != nil {
+		return nil, err
+	}
+
+	txMempool := setupMempool(cfg, dag, sigCache)
+
+	netAdapter, err := netadapter.NewNetAdapter(cfg)
+	if err != nil {
+		return nil, err
+	}
+	addressManager := addressmanager.New(cfg, databaseContext)
+
+	connectionManager, err := connmanager.New(cfg, netAdapter, addressManager)
+	if err != nil {
+		return nil, err
+	}
+
+	protocolManager, err := protocol.NewManager(cfg, dag, netAdapter, addressManager, txMempool, connectionManager)
+	if err != nil {
+		return nil, err
+	}
+	rpcServer, err := setupRPC(
+		cfg, dag, txMempool, sigCache, acceptanceIndex, connectionManager, addressManager, protocolManager)
+	if err != nil {
+		return nil, err
+	}
+
+	return &App{
+		cfg:               cfg,
+		rpcServer:         rpcServer,
+		protocolManager:   protocolManager,
+		connectionManager: connectionManager,
+		netAdapter:        netAdapter,
+		addressManager:    addressManager,
+	}, nil
+}
+
+func (a *App) maybeSeedFromDNS() {
+	if !a.cfg.DisableDNSSeed {
+		dnsseed.SeedFromDNS(a.cfg.NetParams(), a.cfg.DNSSeed, domainmessage.SFNodeNetwork, false, nil,
+			a.cfg.Lookup, func(addresses []*domainmessage.NetAddress) {
+				// Kaspad uses a lookup of the dns seeder here. Since seeder returns
+				// IPs of nodes and not its own IP, we can not know real IP of
+				// source. So we'll take first returned address as source.
+				a.addressManager.AddAddresses(addresses, addresses[0], nil)
+			})
+	}
+}
+func setupDAG(cfg *config.Config, databaseContext *dbaccess.DatabaseContext, interrupt <-chan struct{},
+	sigCache *txscript.SigCache, indexManager blockdag.IndexManager) (*blockdag.BlockDAG, error) {
+
+	dag, err := blockdag.New(&blockdag.Config{
+		Interrupt:       interrupt,
+		DatabaseContext: databaseContext,
+		DAGParams:       cfg.NetParams(),
+		TimeSource:      blockdag.NewTimeSource(),
+		SigCache:        sigCache,
+		IndexManager:    indexManager,
+		SubnetworkID:    cfg.SubnetworkID,
+	})
+	return dag, err
+}
+
+func setupIndexes(cfg *config.Config) (blockdag.IndexManager, *indexers.AcceptanceIndex) {
+	// Create indexes if needed.
+	var indexes []indexers.Indexer
+	var acceptanceIndex *indexers.AcceptanceIndex
+	if cfg.AcceptanceIndex {
+		log.Info("acceptance index is enabled")
+		acceptanceIndex = indexers.NewAcceptanceIndex()
+		indexes = append(indexes, acceptanceIndex)
+	}
+
+	// Create an index manager if any of the optional indexes are enabled.
+	if len(indexes) < 0 {
+		return nil, nil
+	}
+	indexManager := indexers.NewManager(indexes)
+	return indexManager, acceptanceIndex
+}
+
+func setupMempool(cfg *config.Config, dag *blockdag.BlockDAG, sigCache *txscript.SigCache) *mempool.TxPool {
+	mempoolConfig := mempool.Config{
+		Policy: mempool.Policy{
+			AcceptNonStd:    cfg.RelayNonStd,
+			MaxOrphanTxs:    cfg.MaxOrphanTxs,
+			MaxOrphanTxSize: config.DefaultMaxOrphanTxSize,
+			MinRelayTxFee:   cfg.MinRelayTxFee,
+			MaxTxVersion:    1,
+		},
+		CalcSequenceLockNoLock: func(tx *util.Tx, utxoSet blockdag.UTXOSet) (*blockdag.SequenceLock, error) {
+			return dag.CalcSequenceLockNoLock(tx, utxoSet)
+		},
+		SigCache: sigCache,
+		DAG:      dag,
+	}
+
+	return mempool.New(&mempoolConfig)
+}
+
+func setupRPC(cfg *config.Config,
+	dag *blockdag.BlockDAG,
+	txMempool *mempool.TxPool,
+	sigCache *txscript.SigCache,
+	acceptanceIndex *indexers.AcceptanceIndex,
+	connectionManager *connmanager.ConnectionManager,
+	addressManager *addressmanager.AddressManager,
+	protocolManager *protocol.Manager) (*rpc.Server, error) {
+
+	if !cfg.DisableRPC {
+		policy := mining.Policy{
+			BlockMaxMass: cfg.BlockMaxMass,
+		}
+		blockTemplateGenerator := mining.NewBlkTmplGenerator(&policy, txMempool, dag, sigCache)
+
+		rpcServer, err := rpc.NewRPCServer(cfg, dag, txMempool, acceptanceIndex, blockTemplateGenerator,
+			connectionManager, addressManager, protocolManager)
+		if err != nil {
+			return nil, err
+		}
+
+		// Signal process shutdown when the RPC server requests it.
+		spawn("setupRPC-handleShutdownRequest", func() {
+			<-rpcServer.RequestedProcessShutdown()
+			signal.ShutdownRequestChannel <- struct{}{}
+		})
+
+		return rpcServer, nil
+	}
+	return nil, nil
+}
+
+// P2PNodeID returns the network ID associated with this App
+func (a *App) P2PNodeID() *id.ID {
+	return a.netAdapter.ID()
+}
+
+// AddressManager returns the AddressManager associated with this App
+func (a *App) AddressManager() *addressmanager.AddressManager {
+	return a.addressManager
+}

app/log.go

@@ -0,0 +1,14 @@
+// Copyright (c) 2013-2017 The btcsuite developers
+// Copyright (c) 2017 The Decred developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+package app
+
+import (
+	"github.com/kaspanet/kaspad/infrastructure/logger"
+	"github.com/kaspanet/kaspad/util/panics"
+)
+
+var log, _ = logger.Get(logger.SubsystemTags.KASD)
+var spawn = panics.GoroutineWrapperFunc(log)

blockdag/README.md

@@ -1,103 +0,0 @@
-blockchain
-==========
-
-[![Build Status](http://img.shields.io/travis/btcsuite/btcd.svg)](https://travis-ci.org/btcsuite/btcd)
-[![ISC License](http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
-[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](http://godoc.org/github.com/daglabs/btcd/blockchain)
-
-Package blockchain implements bitcoin block handling and chain selection rules.
-The test coverage is currently only around 60%, but will be increasing over
-time. See `test_coverage.txt` for the gocov coverage report.  Alternatively, if
-you are running a POSIX OS, you can run the `cov_report.sh` script for a
-real-time report.  Package blockchain is licensed under the liberal ISC license.
-
-There is an associated blog post about the release of this package
-[here](https://blog.conformal.com/btcchain-the-bitcoin-chain-package-from-bctd/).
-
-This package has intentionally been designed so it can be used as a standalone
-package for any projects needing to handle processing of blocks into the bitcoin
-block chain.
-
-## Installation and Updating
-
-```bash
-$ go get -u github.com/daglabs/btcd/blockchain
-```
-
-## Bitcoin Chain Processing Overview
-
-Before a block is allowed into the block chain, it must go through an intensive
-series of validation rules.  The following list serves as a general outline of
-those rules to provide some intuition into what is going on under the hood, but
-is by no means exhaustive:
-
- - Reject duplicate blocks
- - Perform a series of sanity checks on the block and its transactions such as
-   verifying proof of work, timestamps, number and character of transactions,
-   transaction amounts, script complexity, and merkle root calculations
- - Compare the block against predetermined checkpoints for expected timestamps
-   and difficulty based on elapsed time since the checkpoint
- - Save the most recent orphan blocks for a limited time in case their parent
-   blocks become available
- - Stop processing if the block is an orphan as the rest of the processing
-   depends on the block's position within the block chain
- - Perform a series of more thorough checks that depend on the block's position
-   within the block chain such as verifying block difficulties adhere to
-   difficulty retarget rules, timestamps are after the median of the last
-   several blocks, all transactions are finalized, checkpoint blocks match, and
-   block versions are in line with the previous blocks
- - Determine how the block fits into the chain and perform different actions
-   accordingly in order to ensure any side chains which have higher difficulty
-   than the main chain become the new main chain
- - When a block is being connected to the main chain (either through
-   reorganization of a side chain to the main chain or just extending the
-   main chain), perform further checks on the block's transactions such as
-   verifying transaction duplicates, script complexity for the combination of
-   connected scripts, coinbase maturity, double spends, and connected
-   transaction values
- - Run the transaction scripts to verify the spender is allowed to spend the
-   coins
- - Insert the block into the block database
-
-## Examples
-
-* [ProcessBlock Example](http://godoc.org/github.com/daglabs/btcd/blockchain#example-BlockChain-ProcessBlock)  
-  Demonstrates how to create a new chain instance and use ProcessBlock to
-  attempt to add a block to the chain.  This example intentionally
-  attempts to insert a duplicate genesis block to illustrate how an invalid
-  block is handled.
-
-* [CompactToBig Example](http://godoc.org/github.com/daglabs/btcd/blockchain#example-CompactToBig)  
-  Demonstrates how to convert the compact "bits" in a block header which
-  represent the target difficulty to a big integer and display it using the
-  typical hex notation.
-
-* [BigToCompact Example](http://godoc.org/github.com/daglabs/btcd/blockchain#example-BigToCompact)  
-  Demonstrates how to convert a target difficulty into the
-  compact "bits" in a block header which represent that target difficulty.
-
-## GPG Verification Key
-
-All official release tags are signed by Conformal so users can ensure the code
-has not been tampered with and is coming from the btcsuite developers.  To
-verify the signature perform the following:
-
-- Download the public key from the Conformal website at
-  https://opensource.conformal.com/GIT-GPG-KEY-conformal.txt
-
-- Import the public key into your GPG keyring:
-  ```bash
-  gpg --import GIT-GPG-KEY-conformal.txt
-  ```
-
-- Verify the release tag with the following command where `TAG_NAME` is a
-  placeholder for the specific tag:
-  ```bash
-  git tag -v TAG_NAME
-  ```
-
-## License
-
-
-Package blockchain is licensed under the [copyfree](http://copyfree.org) ISC
-License.

blockdag/accept.go

@@ -1,128 +0,0 @@
-// Copyright (c) 2013-2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"fmt"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-)
-
-func (dag *BlockDAG) addNodeToIndexWithInvalidAncestor(block *util.Block) error {
-	blockHeader := &block.MsgBlock().Header
-	newNode := newBlockNode(blockHeader, newSet(), dag.dagParams.K)
-	newNode.status = statusInvalidAncestor
-	dag.index.AddNode(newNode)
-	return dag.index.flushToDB()
-}
-
-// maybeAcceptBlock potentially accepts a block into the block DAG. It
-// performs several validation checks which depend on its position within
-// the block DAG before adding it. The block is expected to have already
-// gone through ProcessBlock before calling this function with it.
-//
-// The flags are also passed to checkBlockContext and connectToDAG.  See
-// their documentation for how the flags modify their behavior.
-//
-// This function MUST be called with the dagLock held (for writes).
-func (dag *BlockDAG) maybeAcceptBlock(block *util.Block, flags BehaviorFlags) error {
-	parents, err := lookupParentNodes(block, dag)
-	if err != nil {
-		if rErr, ok := err.(RuleError); ok && rErr.ErrorCode == ErrInvalidAncestorBlock {
-			err := dag.addNodeToIndexWithInvalidAncestor(block)
-			if err != nil {
-				return err
-			}
-		}
-		return err
-	}
-
-	// The block must pass all of the validation rules which depend on the
-	// position of the block within the block DAG.
-	err = dag.checkBlockContext(block, parents, flags)
-	if err != nil {
-		return err
-	}
-
-	// Create a new block node for the block and add it to the node index.
-	newNode := newBlockNode(&block.MsgBlock().Header, parents, dag.dagParams.K)
-	newNode.status = statusDataStored
-	dag.index.AddNode(newNode)
-
-	// Insert the block into the database if it's not already there.  Even
-	// though it is possible the block will ultimately fail to connect, it
-	// has already passed all proof-of-work and validity tests which means
-	// it would be prohibitively expensive for an attacker to fill up the
-	// disk with a bunch of blocks that fail to connect.  This is necessary
-	// since it allows block download to be decoupled from the much more
-	// expensive connection logic.  It also has some other nice properties
-	// such as making blocks that never become part of the DAG or
-	// blocks that fail to connect available for further analysis.
-	err = dag.db.Update(func(dbTx database.Tx) error {
-		err := dbStoreBlock(dbTx, block)
-		if err != nil {
-			return err
-		}
-		return dag.index.flushToDBWithTx(dbTx)
-	})
-	if err != nil {
-		return err
-	}
-
-	// Make sure that all the block's transactions are finalized
-	fastAdd := flags&BFFastAdd == BFFastAdd
-	bluestParent := parents.bluest()
-	if !fastAdd {
-		if err := dag.validateAllTxsFinalized(block, newNode, bluestParent); err != nil {
-			return err
-		}
-	}
-
-	block.SetChainHeight(newNode.chainHeight)
-
-	// Connect the passed block to the DAG. This also handles validation of the
-	// transaction scripts.
-	chainUpdates, err := dag.addBlock(newNode, parents, block, flags)
-	if err != nil {
-		return err
-	}
-
-	// Notify the caller that the new block was accepted into the block
-	// DAG.  The caller would typically want to react by relaying the
-	// inventory to other peers.
-	dag.dagLock.Unlock()
-	dag.sendNotification(NTBlockAdded, &BlockAddedNotificationData{
-		Block:         block,
-		WasUnorphaned: flags&BFWasUnorphaned != 0,
-	})
-	dag.sendNotification(NTChainChanged, &ChainChangedNotificationData{
-		RemovedChainBlockHashes: chainUpdates.removedChainBlockHashes,
-		AddedChainBlockHashes:   chainUpdates.addedChainBlockHashes,
-	})
-	dag.dagLock.Lock()
-
-	return nil
-}
-
-func lookupParentNodes(block *util.Block, blockDAG *BlockDAG) (blockSet, error) {
-	header := block.MsgBlock().Header
-	parentHashes := header.ParentHashes
-
-	nodes := newSet()
-	for _, parentHash := range parentHashes {
-		node := blockDAG.index.LookupNode(parentHash)
-		if node == nil {
-			str := fmt.Sprintf("parent block %s is unknown", parentHashes)
-			return nil, ruleError(ErrParentBlockUnknown, str)
-		} else if blockDAG.index.NodeStatus(node).KnownInvalid() {
-			str := fmt.Sprintf("parent block %s is known to be invalid", parentHashes)
-			return nil, ruleError(ErrInvalidAncestorBlock, str)
-		}
-
-		nodes.add(node)
-	}
-
-	return nodes, nil
-}

blockdag/accept_test.go

@@ -1,143 +0,0 @@
-package blockdag
-
-import (
-	"errors"
-	"path/filepath"
-	"strings"
-	"testing"
-
-	"bou.ke/monkey"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-)
-
-func TestMaybeAcceptBlockErrors(t *testing.T) {
-	// Create a new database and DAG instance to run tests against.
-	dag, teardownFunc, err := DAGSetup("TestMaybeAcceptBlockErrors", Config{
-		DAGParams: &dagconfig.SimNetParams,
-	})
-	if err != nil {
-		t.Fatalf("TestMaybeAcceptBlockErrors: Failed to setup DAG instance: %v", err)
-	}
-	defer teardownFunc()
-
-	dag.TestSetCoinbaseMaturity(0)
-
-	// Test rejecting the block if its parents are missing
-	orphanBlockFile := "blk_3B.dat"
-	loadedBlocks, err := LoadBlocks(filepath.Join("testdata/", orphanBlockFile))
-	if err != nil {
-		t.Fatalf("TestMaybeAcceptBlockErrors: "+
-			"Error loading file '%s': %s\n", orphanBlockFile, err)
-	}
-	block := loadedBlocks[0]
-
-	err = dag.maybeAcceptBlock(block, BFNone)
-	if err == nil {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block if its parents are missing: "+
-			"Expected: %s, got: <nil>", ErrParentBlockUnknown)
-	}
-	ruleErr, ok := err.(RuleError)
-	if !ok {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block if its parents are missing: "+
-			"Expected RuleError but got %s", err)
-	} else if ruleErr.ErrorCode != ErrParentBlockUnknown {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block if its parents are missing: "+
-			"Unexpected error code. Want: %s, got: %s", ErrParentBlockUnknown, ruleErr.ErrorCode)
-	}
-
-	// Test rejecting the block if its parents are invalid
-	blocksFile := "blk_0_to_4.dat"
-	blocks, err := LoadBlocks(filepath.Join("testdata/", blocksFile))
-	if err != nil {
-		t.Fatalf("TestMaybeAcceptBlockErrors: "+
-			"Error loading file '%s': %s\n", blocksFile, err)
-	}
-
-	// Add a valid block and mark it as invalid
-	block1 := blocks[1]
-	isOrphan, delay, err := dag.ProcessBlock(block1, BFNone)
-	if err != nil {
-		t.Fatalf("TestMaybeAcceptBlockErrors: Valid block unexpectedly returned an error: %s", err)
-	}
-	if delay != 0 {
-		t.Fatalf("TestMaybeAcceptBlockErrors: block 1 is too far in the future")
-	}
-	if isOrphan {
-		t.Fatalf("TestMaybeAcceptBlockErrors: incorrectly returned block 1 is an orphan")
-	}
-	blockNode1 := dag.index.LookupNode(block1.Hash())
-	dag.index.SetStatusFlags(blockNode1, statusValidateFailed)
-
-	block2 := blocks[2]
-	err = dag.maybeAcceptBlock(block2, BFNone)
-	if err == nil {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block if its parents are invalid: "+
-			"Expected: %s, got: <nil>", ErrInvalidAncestorBlock)
-	}
-	ruleErr, ok = err.(RuleError)
-	if !ok {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block if its parents are invalid: "+
-			"Expected RuleError but got %s", err)
-	} else if ruleErr.ErrorCode != ErrInvalidAncestorBlock {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block if its parents are invalid: "+
-			"Unexpected error. Want: %s, got: %s", ErrInvalidAncestorBlock, ruleErr.ErrorCode)
-	}
-
-	// Set block1's status back to valid for next tests
-	dag.index.UnsetStatusFlags(blockNode1, statusValidateFailed)
-
-	// Test rejecting the block due to bad context
-	originalBits := block2.MsgBlock().Header.Bits
-	block2.MsgBlock().Header.Bits = 0
-	err = dag.maybeAcceptBlock(block2, BFNone)
-	if err == nil {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block due to bad context: "+
-			"Expected: %s, got: <nil>", ErrUnexpectedDifficulty)
-	}
-	ruleErr, ok = err.(RuleError)
-	if !ok {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block due to bad context: "+
-			"Expected RuleError but got %s", err)
-	} else if ruleErr.ErrorCode != ErrUnexpectedDifficulty {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the block due to bad context: "+
-			"Unexpected error. Want: %s, got: %s", ErrUnexpectedDifficulty, ruleErr.ErrorCode)
-	}
-
-	// Set block2's bits back to valid for next tests
-	block2.MsgBlock().Header.Bits = originalBits
-
-	// Test rejecting the node due to database error
-	databaseErrorMessage := "database error"
-	guard := monkey.Patch(dbStoreBlock, func(dbTx database.Tx, block *util.Block) error {
-		return errors.New(databaseErrorMessage)
-	})
-	defer guard.Unpatch()
-	err = dag.maybeAcceptBlock(block2, BFNone)
-	if err == nil {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the node due to database error: "+
-			"Expected: %s, got: <nil>", databaseErrorMessage)
-	}
-	if !strings.Contains(err.Error(), databaseErrorMessage) {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the node due to database error: "+
-			"Unexpected error. Want: %s, got: %s", databaseErrorMessage, err)
-	}
-	guard.Unpatch()
-
-	// Test rejecting the node due to index error
-	indexErrorMessage := "index error"
-	guard = monkey.Patch((*blockIndex).flushToDB, func(_ *blockIndex) error {
-		return errors.New(indexErrorMessage)
-	})
-	defer guard.Unpatch()
-	err = dag.maybeAcceptBlock(block2, BFNone)
-	if err == nil {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the node due to index error: "+
-			"Expected %s, got: <nil>", indexErrorMessage)
-	}
-	if !strings.Contains(err.Error(), indexErrorMessage) {
-		t.Errorf("TestMaybeAcceptBlockErrors: rejecting the node due to index error: "+
-			"Unexpected error. Want: %s, got: %s", indexErrorMessage, err)
-	}
-}

blockdag/blockidhash.go

@@ -1,136 +0,0 @@
-package blockdag
-
-import (
-	"fmt"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-var (
-	// idByHashIndexBucketName is the name of the db bucket used to house
-	// the block hash -> block id index.
-	idByHashIndexBucketName = []byte("idbyhashidx")
-
-	// hashByIDIndexBucketName is the name of the db bucket used to house
-	// the block id -> block hash index.
-	hashByIDIndexBucketName = []byte("hashbyididx")
-
-	currentBlockIDKey = []byte("currentblockid")
-)
-
-// -----------------------------------------------------------------------------
-// This is a mapping between block hashes and unique IDs. The ID
-// is simply a sequentially incremented uint64 that is used instead of block hash
-// for the indexers. This is useful because it is only 8 bytes versus 32 bytes
-// hashes and thus saves a ton of space when a block is referenced in an index.
-// It consists of three buckets: the first bucket maps the hash of each
-// block to the unique ID and the second maps that ID back to the block hash.
-// The third bucket contains the last received block ID, and is used
-// when starting the node to check that the enabled indexes are up to date
-// with the latest received block, and if not, initiate recovery process.
-//
-// The serialized format for keys and values in the block hash to ID bucket is:
-//   <hash> = <ID>
-//
-//   Field           Type              Size
-//   hash            daghash.Hash     32 bytes
-//   ID              uint64            8 bytes
-//   -----
-//   Total: 40 bytes
-//
-// The serialized format for keys and values in the ID to block hash bucket is:
-//   <ID> = <hash>
-//
-//   Field           Type              Size
-//   ID              uint64            8 bytes
-//   hash            daghash.Hash     32 bytes
-//   -----
-//   Total: 40 bytes
-//
-// -----------------------------------------------------------------------------
-
-const blockIDSize = 8 // 8 bytes for block ID
-
-// DBFetchBlockIDByHash uses an existing database transaction to retrieve the
-// block id for the provided hash from the index.
-func DBFetchBlockIDByHash(dbTx database.Tx, hash *daghash.Hash) (uint64, error) {
-	hashIndex := dbTx.Metadata().Bucket(idByHashIndexBucketName)
-	serializedID := hashIndex.Get(hash[:])
-	if serializedID == nil {
-		return 0, fmt.Errorf("no entry in the block ID index for block with hash %s", hash)
-	}
-
-	return DeserializeBlockID(serializedID), nil
-}
-
-// DBFetchBlockHashBySerializedID uses an existing database transaction to
-// retrieve the hash for the provided serialized block id from the index.
-func DBFetchBlockHashBySerializedID(dbTx database.Tx, serializedID []byte) (*daghash.Hash, error) {
-	idIndex := dbTx.Metadata().Bucket(hashByIDIndexBucketName)
-	hashBytes := idIndex.Get(serializedID)
-	if hashBytes == nil {
-		return nil, fmt.Errorf("no entry in the block ID index for block with id %d", byteOrder.Uint64(serializedID))
-	}
-
-	var hash daghash.Hash
-	copy(hash[:], hashBytes)
-	return &hash, nil
-}
-
-// dbPutBlockIDIndexEntry uses an existing database transaction to update or add
-// the index entries for the hash to id and id to hash mappings for the provided
-// values.
-func dbPutBlockIDIndexEntry(dbTx database.Tx, hash *daghash.Hash, serializedID []byte) error {
-	// Add the block hash to ID mapping to the index.
-	meta := dbTx.Metadata()
-	hashIndex := meta.Bucket(idByHashIndexBucketName)
-	if err := hashIndex.Put(hash[:], serializedID[:]); err != nil {
-		return err
-	}
-
-	// Add the block ID to hash mapping to the index.
-	idIndex := meta.Bucket(hashByIDIndexBucketName)
-	return idIndex.Put(serializedID[:], hash[:])
-}
-
-// DBFetchCurrentBlockID returns the last known block ID.
-func DBFetchCurrentBlockID(dbTx database.Tx) uint64 {
-	serializedID := dbTx.Metadata().Get(currentBlockIDKey)
-	if serializedID == nil {
-		return 0
-	}
-	return DeserializeBlockID(serializedID)
-}
-
-// DeserializeBlockID returns a deserialized block id
-func DeserializeBlockID(serializedID []byte) uint64 {
-	return byteOrder.Uint64(serializedID)
-}
-
-// SerializeBlockID returns a serialized block id
-func SerializeBlockID(blockID uint64) []byte {
-	serializedBlockID := make([]byte, blockIDSize)
-	byteOrder.PutUint64(serializedBlockID, blockID)
-	return serializedBlockID
-}
-
-// DBFetchBlockHashByID uses an existing database transaction to retrieve the
-// hash for the provided block id from the index.
-func DBFetchBlockHashByID(dbTx database.Tx, id uint64) (*daghash.Hash, error) {
-	return DBFetchBlockHashBySerializedID(dbTx, SerializeBlockID(id))
-}
-
-func createBlockID(dbTx database.Tx, blockHash *daghash.Hash) (uint64, error) {
-	currentBlockID := DBFetchCurrentBlockID(dbTx)
-	newBlockID := currentBlockID + 1
-	serializedNewBlockID := SerializeBlockID(newBlockID)
-	err := dbTx.Metadata().Put(currentBlockIDKey, serializedNewBlockID)
-	if err != nil {
-		return 0, err
-	}
-	err = dbPutBlockIDIndexEntry(dbTx, blockHash, serializedNewBlockID)
-	if err != nil {
-		return 0, err
-	}
-	return newBlockID, nil
-}

blockdag/blockindex_test.go

@@ -1,58 +0,0 @@
-package blockdag
-
-import (
-	"errors"
-	"strings"
-	"testing"
-	"time"
-
-	"bou.ke/monkey"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/database"
-)
-
-func TestAncestorErrors(t *testing.T) {
-	node := newTestNode(newSet(), int32(0x10000000), 0, time.Unix(0, 0), dagconfig.MainNetParams.K)
-	node.chainHeight = 2
-	ancestor := node.SelectedAncestor(3)
-	if ancestor != nil {
-		t.Errorf("TestAncestorErrors: Ancestor() unexpectedly returned a node. Expected: <nil>")
-	}
-}
-
-func TestFlushToDBErrors(t *testing.T) {
-	// Create a new database and DAG instance to run tests against.
-	dag, teardownFunc, err := DAGSetup("TestFlushToDBErrors", Config{
-		DAGParams: &dagconfig.SimNetParams,
-	})
-	if err != nil {
-		t.Fatalf("TestFlushToDBErrors: Failed to setup DAG instance: %s", err)
-	}
-	defer teardownFunc()
-
-	// Call flushToDB without anything to flush. This should succeed
-	err = dag.index.flushToDB()
-	if err != nil {
-		t.Errorf("TestFlushToDBErrors: flushToDB without anything to flush: "+
-			"Unexpected flushToDB error: %s", err)
-	}
-
-	// Mark the genesis block as dirty
-	dag.index.SetStatusFlags(dag.genesis, statusValid)
-
-	// Test flushToDB failure due to database error
-	databaseErrorMessage := "database error"
-	guard := monkey.Patch(dbStoreBlockNode, func(_ database.Tx, _ *blockNode) error {
-		return errors.New(databaseErrorMessage)
-	})
-	defer guard.Unpatch()
-	err = dag.index.flushToDB()
-	if err == nil {
-		t.Errorf("TestFlushToDBErrors: flushToDB failure due to database error: "+
-			"Expected: %s, got: <nil>", databaseErrorMessage)
-	}
-	if !strings.Contains(err.Error(), databaseErrorMessage) {
-		t.Errorf("TestFlushToDBErrors: flushToDB failure due to database error: "+
-			"Unexpected flushToDB error. Expected: %s, got: %s", databaseErrorMessage, err)
-	}
-}

blockdag/blocklocator.go

@@ -1,143 +0,0 @@
-package blockdag
-
-import (
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-// BlockLocator is used to help locate a specific block.  The algorithm for
-// building the block locator is to add block hashes in reverse order on the
-// block's selected parent chain until the desired stop block is reached.
-// In order to keep the list of locator hashes to a reasonable number of entries,
-// the step between each entry is doubled each loop iteration to exponentially
-// decrease the number of hashes as a function of the distance from the block
-// being located.
-//
-// For example, assume a selected parent chain with IDs as depicted below, and the
-// stop block is genesis:
-// 	genesis -> 1 -> 2 -> ... -> 15 -> 16  -> 17  -> 18
-//
-// The block locator for block 17 would be the hashes of blocks:
-//  [17 16 14 11 7 2 genesis]
-type BlockLocator []*daghash.Hash
-
-// BlockLocatorFromHashes returns a block locator from start and stop hash.
-// See BlockLocator for details on the algorithm used to create a block locator.
-//
-// In addition to the general algorithm referenced above, this function will
-// return the block locator for the selected tip if the passed hash is not currently
-// known.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) BlockLocatorFromHashes(startHash, stopHash *daghash.Hash) BlockLocator {
-	dag.dagLock.RLock()
-	defer dag.dagLock.RUnlock()
-	startNode := dag.index.LookupNode(startHash)
-	var stopNode *blockNode
-	if !stopHash.IsEqual(&daghash.ZeroHash) {
-		stopNode = dag.index.LookupNode(stopHash)
-	}
-	return dag.blockLocator(startNode, stopNode)
-}
-
-// LatestBlockLocator returns a block locator for the current tips of the DAG.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) LatestBlockLocator() BlockLocator {
-	dag.dagLock.RLock()
-	defer dag.dagLock.RUnlock()
-	return dag.blockLocator(nil, nil)
-}
-
-// blockLocator returns a block locator for the passed start and stop nodes.
-// The default value for the start node is the selected tip, and the default
-// values of the stop node is the genesis block.
-//
-// See the BlockLocator type comments for more details.
-//
-// This function MUST be called with the DAG state lock held (for reads).
-func (dag *BlockDAG) blockLocator(startNode, stopNode *blockNode) BlockLocator {
-	// Use the selected tip if requested.
-	if startNode == nil {
-		startNode = dag.virtual.selectedParent
-	}
-
-	if stopNode == nil {
-		stopNode = dag.genesis
-	}
-
-	// We use the selected parent of the start node, so the
-	// block locator won't contain the start node.
-	startNode = startNode.selectedParent
-
-	// If the start node or the stop node are not in the
-	// virtual's selected parent chain, we replace them with their
-	// closest selected parent that is part of the virtual's
-	// selected parent chain.
-	for !dag.IsInSelectedParentChain(stopNode.hash) {
-		stopNode = stopNode.selectedParent
-	}
-
-	for !dag.IsInSelectedParentChain(startNode.hash) {
-		startNode = startNode.selectedParent
-	}
-
-	// Calculate the max number of entries that will ultimately be in the
-	// block locator.  See the description of the algorithm for how these
-	// numbers are derived.
-
-	// startNode.hash + stopNode.hash.
-	// Then floor(log2(startNode.chainHeight-stopNode.chainHeight)) entries for the skip portion.
-	maxEntries := 2 + util.FastLog2Floor(startNode.chainHeight-stopNode.chainHeight)
-	locator := make(BlockLocator, 0, maxEntries)
-
-	step := uint64(1)
-	for node := startNode; node != nil; {
-		locator = append(locator, node.hash)
-
-		// Nothing more to add once the stop node has been added.
-		if node.chainHeight == stopNode.chainHeight {
-			break
-		}
-
-		// Calculate chainHeight of previous node to include ensuring the
-		// final node is stopNode.
-		nextChainHeight := node.chainHeight - step
-		if nextChainHeight < stopNode.chainHeight {
-			nextChainHeight = stopNode.chainHeight
-		}
-
-		// walk backwards through the nodes to the correct ancestor.
-		node = node.SelectedAncestor(nextChainHeight)
-
-		// Double the distance between included hashes.
-		step *= 2
-	}
-
-	return locator
-}
-
-// FindNextLocatorBoundaries returns the lowest unknown block locator, hash
-// and the highest known block locator hash. This is used to create the
-// next block locator to find the highest shared known chain block with the
-// sync peer.
-//
-// This function MUST be called with the DAG state lock held (for reads).
-func (dag *BlockDAG) FindNextLocatorBoundaries(locator BlockLocator) (startHash, stopHash *daghash.Hash) {
-	// Find the most recent locator block hash in the DAG.  In the case none of
-	// the hashes in the locator are in the DAG, fall back to the genesis block.
-	stopNode := dag.genesis
-	nextBlockLocatorIndex := int64(len(locator) - 1)
-	for i, hash := range locator {
-		node := dag.index.LookupNode(hash)
-		if node != nil {
-			stopNode = node
-			nextBlockLocatorIndex = int64(i) - 1
-			break
-		}
-	}
-	if nextBlockLocatorIndex < 0 {
-		return nil, stopNode.hash
-	}
-	return locator[nextBlockLocatorIndex], stopNode.hash
-}

blockdag/blocknode_test.go

@@ -1,86 +0,0 @@
-package blockdag
-
-import (
-	"testing"
-)
-
-func TestChainHeight(t *testing.T) {
-	phantomK := uint32(2)
-	buildNode := buildNodeGenerator(phantomK, true)
-
-	node0 := buildNode(setFromSlice())
-	node1 := buildNode(setFromSlice(node0))
-	node2 := buildNode(setFromSlice(node0))
-	node3 := buildNode(setFromSlice(node0))
-	node4 := buildNode(setFromSlice(node1, node2, node3))
-	node5 := buildNode(setFromSlice(node1, node2, node3))
-	node6 := buildNode(setFromSlice(node1, node2, node3))
-	node7 := buildNode(setFromSlice(node0))
-	node8 := buildNode(setFromSlice(node7))
-	node9 := buildNode(setFromSlice(node8))
-	node10 := buildNode(setFromSlice(node9, node6))
-
-	// Because nodes 7 & 8 were mined secretly, node10's selected
-	// parent will be node6, although node9 is higher. So in this
-	// case, node10.height and node10.chainHeight will be different
-
-	tests := []struct {
-		node                *blockNode
-		expectedChainHeight uint64
-	}{
-		{
-			node:                node0,
-			expectedChainHeight: 0,
-		},
-		{
-			node:                node1,
-			expectedChainHeight: 1,
-		},
-		{
-			node:                node2,
-			expectedChainHeight: 1,
-		},
-		{
-			node:                node3,
-			expectedChainHeight: 1,
-		},
-		{
-			node:                node4,
-			expectedChainHeight: 2,
-		},
-		{
-			node:                node5,
-			expectedChainHeight: 2,
-		},
-		{
-			node:                node6,
-			expectedChainHeight: 2,
-		},
-		{
-			node:                node7,
-			expectedChainHeight: 1,
-		},
-		{
-			node:                node8,
-			expectedChainHeight: 2,
-		},
-		{
-			node:                node9,
-			expectedChainHeight: 3,
-		},
-		{
-			node:                node10,
-			expectedChainHeight: 3,
-		},
-	}
-
-	for _, test := range tests {
-		if test.node.chainHeight != test.expectedChainHeight {
-			t.Errorf("block %v expected chain height %v but got %v", test.node, test.expectedChainHeight, test.node.chainHeight)
-		}
-		if calculateChainHeight(test.node) != test.expectedChainHeight {
-			t.Errorf("block %v expected calculated chain height %v but got %v", test.node, test.expectedChainHeight, test.node.chainHeight)
-		}
-	}
-
-}

blockdag/blockset.go

@@ -1,162 +0,0 @@
-package blockdag
-
-import (
-	"strings"
-
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-// blockSet implements a basic unsorted set of blocks
-type blockSet map[daghash.Hash]*blockNode
-
-// newSet creates a new, empty BlockSet
-func newSet() blockSet {
-	return map[daghash.Hash]*blockNode{}
-}
-
-// setFromSlice converts a slice of blocks into an unordered set represented as map
-func setFromSlice(blocks ...*blockNode) blockSet {
-	set := newSet()
-	for _, block := range blocks {
-		set.add(block)
-	}
-	return set
-}
-
-// maxHeight returns the height of the highest block in the block set
-func (bs blockSet) maxHeight() uint64 {
-	var maxHeight uint64
-	for _, node := range bs {
-		if maxHeight < node.height {
-			maxHeight = node.height
-		}
-	}
-	return maxHeight
-}
-
-// add adds a block to this BlockSet
-func (bs blockSet) add(block *blockNode) {
-	bs[*block.hash] = block
-}
-
-// remove removes a block from this BlockSet, if exists
-// Does nothing if this set does not contain the block
-func (bs blockSet) remove(block *blockNode) {
-	delete(bs, *block.hash)
-}
-
-// clone clones thie block set
-func (bs blockSet) clone() blockSet {
-	clone := newSet()
-	for _, block := range bs {
-		clone.add(block)
-	}
-	return clone
-}
-
-// subtract returns the difference between the BlockSet and another BlockSet
-func (bs blockSet) subtract(other blockSet) blockSet {
-	diff := newSet()
-	for _, block := range bs {
-		if !other.contains(block) {
-			diff.add(block)
-		}
-	}
-	return diff
-}
-
-// addSet adds all blocks in other set to this set
-func (bs blockSet) addSet(other blockSet) {
-	for _, block := range other {
-		bs.add(block)
-	}
-}
-
-// addSlice adds provided slice to this set
-func (bs blockSet) addSlice(slice []*blockNode) {
-	for _, block := range slice {
-		bs.add(block)
-	}
-}
-
-// union returns a BlockSet that contains all blocks included in this set,
-// the other set, or both
-func (bs blockSet) union(other blockSet) blockSet {
-	union := bs.clone()
-
-	union.addSet(other)
-
-	return union
-}
-
-// contains returns true iff this set contains block
-func (bs blockSet) contains(block *blockNode) bool {
-	_, ok := bs[*block.hash]
-	return ok
-}
-
-// containsHash returns true iff this set contains a block hash
-func (bs blockSet) containsHash(hash *daghash.Hash) bool {
-	_, ok := bs[*hash]
-	return ok
-}
-
-// hashesEqual returns true if the given hashes are equal to the hashes
-// of the blocks in this set.
-// NOTE: The given hash slice must not contain duplicates.
-func (bs blockSet) hashesEqual(hashes []*daghash.Hash) bool {
-	if len(hashes) != len(bs) {
-		return false
-	}
-
-	for _, hash := range hashes {
-		if _, wasFound := bs[*hash]; !wasFound {
-			return false
-		}
-	}
-
-	return true
-}
-
-// hashes returns the hashes of the blocks in this set.
-func (bs blockSet) hashes() []*daghash.Hash {
-	hashes := make([]*daghash.Hash, 0, len(bs))
-	for _, node := range bs {
-		hashes = append(hashes, node.hash)
-	}
-	daghash.Sort(hashes)
-	return hashes
-}
-
-func (bs blockSet) String() string {
-	nodeStrs := make([]string, 0, len(bs))
-	for _, node := range bs {
-		nodeStrs = append(nodeStrs, node.String())
-	}
-	return strings.Join(nodeStrs, ",")
-}
-
-// anyChildInSet returns true iff any child of block is contained within this set
-func (bs blockSet) anyChildInSet(block *blockNode) bool {
-	for _, child := range block.children {
-		if bs.contains(child) {
-			return true
-		}
-	}
-
-	return false
-}
-
-func (bs blockSet) bluest() *blockNode {
-	var bluestNode *blockNode
-	var maxScore uint64
-	for _, node := range bs {
-		if bluestNode == nil ||
-			node.blueScore > maxScore ||
-			(node.blueScore == maxScore && daghash.Less(node.hash, bluestNode.hash)) {
-			bluestNode = node
-			maxScore = node.blueScore
-		}
-	}
-	return bluestNode
-}

blockdag/checkpoints.go

@@ -1,257 +0,0 @@
-// Copyright (c) 2013-2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"fmt"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/txscript"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-// CheckpointConfirmations is the number of blocks before the end of the current
-// best block chain that a good checkpoint candidate must be.
-const CheckpointConfirmations = 2016
-
-// newHashFromStr converts the passed big-endian hex string into a
-// daghash.Hash.  It only differs from the one available in daghash in that
-// it ignores the error since it will only (and must only) be called with
-// hard-coded, and therefore known good, hashes.
-func newHashFromStr(hexStr string) *daghash.Hash {
-	hash, _ := daghash.NewHashFromStr(hexStr)
-	return hash
-}
-
-// newTxIDFromStr converts the passed big-endian hex string into a
-// daghash.TxID.  It only differs from the one available in daghash in that
-// it ignores the error since it will only (and must only) be called with
-// hard-coded, and therefore known good, IDs.
-func newTxIDFromStr(hexStr string) *daghash.TxID {
-	txID, _ := daghash.NewTxIDFromStr(hexStr)
-	return txID
-}
-
-// Checkpoints returns a slice of checkpoints (regardless of whether they are
-// already known).  When there are no checkpoints for the chain, it will return
-// nil.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) Checkpoints() []dagconfig.Checkpoint {
-	return dag.checkpoints
-}
-
-// HasCheckpoints returns whether this BlockDAG has checkpoints defined.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) HasCheckpoints() bool {
-	return len(dag.checkpoints) > 0
-}
-
-// LatestCheckpoint returns the most recent checkpoint (regardless of whether it
-// is already known). When there are no defined checkpoints for the active chain
-// instance, it will return nil.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) LatestCheckpoint() *dagconfig.Checkpoint {
-	if !dag.HasCheckpoints() {
-		return nil
-	}
-	return &dag.checkpoints[len(dag.checkpoints)-1]
-}
-
-// verifyCheckpoint returns whether the passed block chain height and hash combination
-// match the checkpoint data.  It also returns true if there is no checkpoint
-// data for the passed block chain height.
-func (dag *BlockDAG) verifyCheckpoint(chainHeight uint64, hash *daghash.Hash) bool {
-	if !dag.HasCheckpoints() {
-		return true
-	}
-
-	// Nothing to check if there is no checkpoint data for the block chainHeight.
-	checkpoint, exists := dag.checkpointsByChainHeight[chainHeight]
-	if !exists {
-		return true
-	}
-
-	if !checkpoint.Hash.IsEqual(hash) {
-		return false
-	}
-
-	log.Infof("Verified checkpoint at chainHeight %d/block %s", checkpoint.ChainHeight,
-		checkpoint.Hash)
-	return true
-}
-
-// findPreviousCheckpoint finds the most recent checkpoint that is already
-// available in the downloaded portion of the block chain and returns the
-// associated block node.  It returns nil if a checkpoint can't be found (this
-// should really only happen for blocks before the first checkpoint).
-//
-// This function MUST be called with the DAG lock held (for reads).
-func (dag *BlockDAG) findPreviousCheckpoint() (*blockNode, error) {
-	if !dag.HasCheckpoints() {
-		return nil, nil
-	}
-
-	// Perform the initial search to find and cache the latest known
-	// checkpoint if the best chain is not known yet or we haven't already
-	// previously searched.
-	checkpoints := dag.checkpoints
-	numCheckpoints := len(checkpoints)
-	if dag.checkpointNode == nil && dag.nextCheckpoint == nil {
-		// Loop backwards through the available checkpoints to find one
-		// that is already available.
-		for i := numCheckpoints - 1; i >= 0; i-- {
-			node := dag.index.LookupNode(checkpoints[i].Hash)
-			if node == nil {
-				continue
-			}
-
-			// Checkpoint found.  Cache it for future lookups and
-			// set the next expected checkpoint accordingly.
-			dag.checkpointNode = node
-			if i < numCheckpoints-1 {
-				dag.nextCheckpoint = &checkpoints[i+1]
-			}
-			return dag.checkpointNode, nil
-		}
-
-		// No known latest checkpoint.  This will only happen on blocks
-		// before the first known checkpoint.  So, set the next expected
-		// checkpoint to the first checkpoint and return the fact there
-		// is no latest known checkpoint block.
-		dag.nextCheckpoint = &checkpoints[0]
-		return nil, nil
-	}
-
-	// At this point we've already searched for the latest known checkpoint,
-	// so when there is no next checkpoint, the current checkpoint lockin
-	// will always be the latest known checkpoint.
-	if dag.nextCheckpoint == nil {
-		return dag.checkpointNode, nil
-	}
-
-	// When there is a next checkpoint and the chain height of the current
-	// selected tip of the DAG does not exceed it, the current checkpoint
-	// lockin is still the latest known checkpoint.
-	if dag.selectedTip().chainHeight < dag.nextCheckpoint.ChainHeight {
-		return dag.checkpointNode, nil
-	}
-
-	// We've reached or exceeded the next checkpoint height.  Note that
-	// once a checkpoint lockin has been reached, forks are prevented from
-	// any blocks before the checkpoint, so we don't have to worry about the
-	// checkpoint going away out from under us due to a chain reorganize.
-
-	// Cache the latest known checkpoint for future lookups.  Note that if
-	// this lookup fails something is very wrong since the chain has already
-	// passed the checkpoint which was verified as accurate before inserting
-	// it.
-	checkpointNode := dag.index.LookupNode(dag.nextCheckpoint.Hash)
-	if checkpointNode == nil {
-		return nil, AssertError(fmt.Sprintf("findPreviousCheckpoint "+
-			"failed lookup of known good block node %s",
-			dag.nextCheckpoint.Hash))
-	}
-	dag.checkpointNode = checkpointNode
-
-	// Set the next expected checkpoint.
-	checkpointIndex := -1
-	for i := numCheckpoints - 1; i >= 0; i-- {
-		if checkpoints[i].Hash.IsEqual(dag.nextCheckpoint.Hash) {
-			checkpointIndex = i
-			break
-		}
-	}
-	dag.nextCheckpoint = nil
-	if checkpointIndex != -1 && checkpointIndex < numCheckpoints-1 {
-		dag.nextCheckpoint = &checkpoints[checkpointIndex+1]
-	}
-
-	return dag.checkpointNode, nil
-}
-
-// isNonstandardTransaction determines whether a transaction contains any
-// scripts which are not one of the standard types.
-func isNonstandardTransaction(tx *util.Tx) bool {
-	// Check all of the output public key scripts for non-standard scripts.
-	for _, txOut := range tx.MsgTx().TxOut {
-		scriptClass := txscript.GetScriptClass(txOut.ScriptPubKey)
-		if scriptClass == txscript.NonStandardTy {
-			return true
-		}
-	}
-	return false
-}
-
-// IsCheckpointCandidate returns whether or not the passed block is a good
-// checkpoint candidate.
-//
-// The factors used to determine a good checkpoint are:
-//  - The block must be in the main chain
-//  - The block must be at least 'CheckpointConfirmations' blocks prior to the
-//    current end of the main chain
-//  - The timestamps for the blocks before and after the checkpoint must have
-//    timestamps which are also before and after the checkpoint, respectively
-//    (due to the median time allowance this is not always the case)
-//  - The block must not contain any strange transaction such as those with
-//    nonstandard scripts
-//
-// The intent is that candidates are reviewed by a developer to make the final
-// decision and then manually added to the list of checkpoints for a network.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) IsCheckpointCandidate(block *util.Block) (bool, error) {
-	dag.dagLock.RLock()
-	defer dag.dagLock.RUnlock()
-
-	// A checkpoint must be in the DAG.
-	node := dag.index.LookupNode(block.Hash())
-	if node == nil {
-		return false, nil
-	}
-
-	// Ensure the chain height of the passed block and the entry for the block
-	// in the DAG match.  This should always be the case unless the
-	// caller provided an invalid block.
-	if node.chainHeight != block.ChainHeight() {
-		return false, fmt.Errorf("passed block chain height of %d does not "+
-			"match the its height in the DAG: %d", block.ChainHeight(),
-			node.chainHeight)
-	}
-
-	// A checkpoint must be at least CheckpointConfirmations blocks
-	// before the end of the main chain.
-	dagChainHeight := dag.selectedTip().chainHeight
-	if node.chainHeight > (dagChainHeight - CheckpointConfirmations) {
-		return false, nil
-	}
-
-	// A checkpoint must be have at least one block after it.
-	//
-	// This should always succeed since the check above already made sure it
-	// is CheckpointConfirmations back, but be safe in case the constant
-	// changes.
-	if len(node.children) == 0 {
-		return false, nil
-	}
-
-	// A checkpoint must be have at least one block before it.
-	if &node.selectedParent == nil {
-		return false, nil
-	}
-
-	// A checkpoint must have transactions that only contain standard
-	// scripts.
-	for _, tx := range block.Transactions() {
-		if isNonstandardTransaction(tx) {
-			return false, nil
-		}
-	}
-
-	// All of the checks passed, so the block is a candidate.
-	return true, nil
-}

blockdag/coinbase.go

@@ -1,279 +0,0 @@
-package blockdag
-
-import (
-	"bufio"
-	"bytes"
-	"encoding/binary"
-	"errors"
-	"fmt"
-	"github.com/daglabs/btcd/util/subnetworkid"
-	"io"
-	"math"
-
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/util/txsort"
-	"github.com/daglabs/btcd/wire"
-)
-
-// compactFeeData is a specialized data type to store a compact list of fees
-// inside a block.
-// Every transaction gets a single uint64 value, stored as a plain binary list.
-// The transactions are ordered the same way they are ordered inside the block, making it easy
-// to traverse every transaction in a block and extract its fee.
-//
-// compactFeeFactory is used to create such a list.
-// compactFeeIterator is used to iterate over such a list.
-
-type compactFeeData []byte
-
-func (cfd compactFeeData) Len() int {
-	return len(cfd) / 8
-}
-
-type compactFeeFactory struct {
-	buffer *bytes.Buffer
-	writer *bufio.Writer
-}
-
-func newCompactFeeFactory() *compactFeeFactory {
-	buffer := bytes.NewBuffer([]byte{})
-	return &compactFeeFactory{
-		buffer: buffer,
-		writer: bufio.NewWriter(buffer),
-	}
-}
-
-func (cfw *compactFeeFactory) add(txFee uint64) error {
-	return binary.Write(cfw.writer, binary.LittleEndian, txFee)
-}
-
-func (cfw *compactFeeFactory) data() (compactFeeData, error) {
-	err := cfw.writer.Flush()
-
-	return compactFeeData(cfw.buffer.Bytes()), err
-}
-
-type compactFeeIterator struct {
-	reader io.Reader
-}
-
-func (cfd compactFeeData) iterator() *compactFeeIterator {
-	return &compactFeeIterator{
-		reader: bufio.NewReader(bytes.NewBuffer(cfd)),
-	}
-}
-
-func (cfr *compactFeeIterator) next() (uint64, error) {
-	var txFee uint64
-
-	err := binary.Read(cfr.reader, binary.LittleEndian, &txFee)
-
-	return txFee, err
-}
-
-// The following functions relate to storing and retrieving fee data from the database
-var feeBucket = []byte("fees")
-
-// getBluesFeeData returns the compactFeeData for all nodes's blues,
-// used to calculate the fees this blockNode needs to pay
-func (node *blockNode) getBluesFeeData(dag *BlockDAG) (map[daghash.Hash]compactFeeData, error) {
-	bluesFeeData := make(map[daghash.Hash]compactFeeData)
-
-	err := dag.db.View(func(dbTx database.Tx) error {
-		for _, blueBlock := range node.blues {
-			feeData, err := dbFetchFeeData(dbTx, blueBlock.hash)
-			if err != nil {
-				return fmt.Errorf("Error getting fee data for block %s: %s", blueBlock.hash, err)
-			}
-
-			bluesFeeData[*blueBlock.hash] = feeData
-		}
-
-		return nil
-	})
-	if err != nil {
-		return nil, err
-	}
-
-	return bluesFeeData, nil
-}
-
-func dbStoreFeeData(dbTx database.Tx, blockHash *daghash.Hash, feeData compactFeeData) error {
-	feeBucket, err := dbTx.Metadata().CreateBucketIfNotExists(feeBucket)
-	if err != nil {
-		return fmt.Errorf("Error creating or retrieving fee bucket: %s", err)
-	}
-
-	return feeBucket.Put(blockHash.CloneBytes(), feeData)
-}
-
-func dbFetchFeeData(dbTx database.Tx, blockHash *daghash.Hash) (compactFeeData, error) {
-	feeBucket := dbTx.Metadata().Bucket(feeBucket)
-	if feeBucket == nil {
-		return nil, errors.New("Fee bucket does not exist")
-	}
-
-	feeData := feeBucket.Get(blockHash.CloneBytes())
-	if feeData == nil {
-		return nil, fmt.Errorf("No fee data found for block %s", blockHash)
-	}
-
-	return feeData, nil
-}
-
-// The following functions deal with building and validating the coinbase transaction
-
-func (node *blockNode) validateCoinbaseTransaction(dag *BlockDAG, block *util.Block, txsAcceptanceData MultiBlockTxsAcceptanceData) error {
-	if node.isGenesis() {
-		return nil
-	}
-	blockCoinbaseTx := block.CoinbaseTransaction().MsgTx()
-	scriptPubKey, extraData, err := DeserializeCoinbasePayload(blockCoinbaseTx)
-	if err != nil {
-		return err
-	}
-	expectedCoinbaseTransaction, err := node.expectedCoinbaseTransaction(dag, txsAcceptanceData, scriptPubKey, extraData)
-	if err != nil {
-		return err
-	}
-
-	if !expectedCoinbaseTransaction.Hash().IsEqual(block.CoinbaseTransaction().Hash()) {
-		return ruleError(ErrBadCoinbaseTransaction, "Coinbase transaction is not built as expected")
-	}
-
-	return nil
-}
-
-// expectedCoinbaseTransaction returns the coinbase transaction for the current block
-func (node *blockNode) expectedCoinbaseTransaction(dag *BlockDAG, txsAcceptanceData MultiBlockTxsAcceptanceData, scriptPubKey []byte, extraData []byte) (*util.Tx, error) {
-	bluesFeeData, err := node.getBluesFeeData(dag)
-	if err != nil {
-		return nil, err
-	}
-
-	txIns := []*wire.TxIn{}
-	txOuts := []*wire.TxOut{}
-
-	for _, blue := range node.blues {
-		txIn, txOut, err := coinbaseInputAndOutputForBlueBlock(dag, blue, txsAcceptanceData, bluesFeeData)
-		if err != nil {
-			return nil, err
-		}
-		txIns = append(txIns, txIn)
-		if txOut != nil {
-			txOuts = append(txOuts, txOut)
-		}
-	}
-	payload, err := SerializeCoinbasePayload(scriptPubKey, extraData)
-	if err != nil {
-		return nil, err
-	}
-	coinbaseTx := wire.NewSubnetworkMsgTx(wire.TxVersion, txIns, txOuts, subnetworkid.SubnetworkIDCoinbase, 0, payload)
-	sortedCoinbaseTx := txsort.Sort(coinbaseTx)
-	return util.NewTx(sortedCoinbaseTx), nil
-}
-
-// SerializeCoinbasePayload builds the coinbase payload based on the provided scriptPubKey and extra data.
-func SerializeCoinbasePayload(scriptPubKey []byte, extraData []byte) ([]byte, error) {
-	w := &bytes.Buffer{}
-	err := wire.WriteVarInt(w, uint64(len(scriptPubKey)))
-	if err != nil {
-		return nil, err
-	}
-	_, err = w.Write(scriptPubKey)
-	if err != nil {
-		return nil, err
-	}
-	_, err = w.Write(extraData)
-	if err != nil {
-		return nil, err
-	}
-	return w.Bytes(), nil
-}
-
-// DeserializeCoinbasePayload deserialize the coinbase payload to its component (scriptPubKey and extra data).
-func DeserializeCoinbasePayload(tx *wire.MsgTx) (scriptPubKey []byte, extraData []byte, err error) {
-	r := bytes.NewReader(tx.Payload)
-	scriptPubKeyLen, err := wire.ReadVarInt(r)
-	if err != nil {
-		return nil, nil, err
-	}
-	scriptPubKey = make([]byte, scriptPubKeyLen)
-	_, err = r.Read(scriptPubKey)
-	if err != nil {
-		return nil, nil, err
-	}
-	extraData = make([]byte, r.Len())
-	if r.Len() != 0 {
-		_, err = r.Read(extraData)
-		if err != nil {
-			return nil, nil, err
-		}
-	}
-	return scriptPubKey, extraData, nil
-}
-
-// feeInputAndOutputForBlueBlock calculates the input and output that should go into the coinbase transaction of blueBlock
-// If blueBlock gets no fee - returns only txIn and nil for txOut
-func coinbaseInputAndOutputForBlueBlock(dag *BlockDAG, blueBlock *blockNode,
-	txsAcceptanceData MultiBlockTxsAcceptanceData, feeData map[daghash.Hash]compactFeeData) (
-	*wire.TxIn, *wire.TxOut, error) {
-
-	blockTxsAcceptanceData, ok := txsAcceptanceData[*blueBlock.hash]
-	if !ok {
-		return nil, nil, fmt.Errorf("No txsAcceptanceData for block %s", blueBlock.hash)
-	}
-	blockFeeData, ok := feeData[*blueBlock.hash]
-	if !ok {
-		return nil, nil, fmt.Errorf("No feeData for block %s", blueBlock.hash)
-	}
-
-	if len(blockTxsAcceptanceData) != blockFeeData.Len() {
-		return nil, nil, fmt.Errorf(
-			"length of accepted transaction data(%d) and fee data(%d) is not equal for block %s",
-			len(blockTxsAcceptanceData), blockFeeData.Len(), blueBlock.hash)
-	}
-
-	txIn := &wire.TxIn{
-		SignatureScript: []byte{},
-		PreviousOutpoint: wire.Outpoint{
-			TxID:  daghash.TxID(*blueBlock.hash),
-			Index: math.MaxUint32,
-		},
-		Sequence: wire.MaxTxInSequenceNum,
-	}
-
-	totalFees := uint64(0)
-	feeIterator := blockFeeData.iterator()
-
-	for _, txAcceptanceData := range blockTxsAcceptanceData {
-		fee, err := feeIterator.next()
-		if err != nil {
-			return nil, nil, fmt.Errorf("Error retrieving fee from compactFeeData iterator: %s", err)
-		}
-		if txAcceptanceData.IsAccepted {
-			totalFees += fee
-		}
-	}
-
-	totalReward := CalcBlockSubsidy(blueBlock.height, dag.dagParams) + totalFees
-
-	if totalReward == 0 {
-		return txIn, nil, nil
-	}
-
-	// the ScriptPubKey for the coinbase is parsed from the coinbase payload
-	scriptPubKey, _, err := DeserializeCoinbasePayload(blockTxsAcceptanceData[0].Tx.MsgTx())
-	if err != nil {
-		return nil, nil, err
-	}
-
-	txOut := &wire.TxOut{
-		Value:        totalReward,
-		ScriptPubKey: scriptPubKey,
-	}
-
-	return txIn, txOut, nil
-}

blockdag/common_test.go

@@ -1,211 +0,0 @@
-// Copyright (c) 2013-2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"compress/bzip2"
-	"encoding/binary"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"reflect"
-	"strings"
-	"testing"
-	"time"
-
-	"github.com/daglabs/btcd/dagconfig"
-	_ "github.com/daglabs/btcd/database/ffldb"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-)
-
-func loadBlocksWithLog(t *testing.T, filename string) ([]*util.Block, error) {
-	blocks, err := LoadBlocks(filename)
-	if err == nil {
-		t.Logf("Loaded %d blocks from file %s", len(blocks), filename)
-		for i, b := range blocks {
-			t.Logf("Block #%d: %s", i, b.Hash())
-		}
-	}
-	return blocks, err
-}
-
-// loadUTXOSet returns a utxo view loaded from a file.
-func loadUTXOSet(filename string) (UTXOSet, error) {
-	// The utxostore file format is:
-	// <tx hash><output index><serialized utxo len><serialized utxo>
-	//
-	// The output index and serialized utxo len are little endian uint32s
-	// and the serialized utxo uses the format described in dagio.go.
-
-	filename = filepath.Join("testdata", filename)
-	fi, err := os.Open(filename)
-	if err != nil {
-		return nil, err
-	}
-
-	// Choose read based on whether the file is compressed or not.
-	var r io.Reader
-	if strings.HasSuffix(filename, ".bz2") {
-		r = bzip2.NewReader(fi)
-	} else {
-		r = fi
-	}
-	defer fi.Close()
-
-	utxoSet := NewFullUTXOSet()
-	for {
-		// Tx ID of the utxo entry.
-		var txID daghash.TxID
-		_, err := io.ReadAtLeast(r, txID[:], len(txID[:]))
-		if err != nil {
-			// Expected EOF at the right offset.
-			if err == io.EOF {
-				break
-			}
-			return nil, err
-		}
-
-		// Output index of the utxo entry.
-		var index uint32
-		err = binary.Read(r, binary.LittleEndian, &index)
-		if err != nil {
-			return nil, err
-		}
-
-		// Num of serialized utxo entry bytes.
-		var numBytes uint32
-		err = binary.Read(r, binary.LittleEndian, &numBytes)
-		if err != nil {
-			return nil, err
-		}
-
-		// Serialized utxo entry.
-		serialized := make([]byte, numBytes)
-		_, err = io.ReadAtLeast(r, serialized, int(numBytes))
-		if err != nil {
-			return nil, err
-		}
-
-		// Deserialize it and add it to the view.
-		entry, err := deserializeUTXOEntry(serialized)
-		if err != nil {
-			return nil, err
-		}
-		utxoSet.utxoCollection[wire.Outpoint{TxID: txID, Index: index}] = entry
-	}
-
-	return utxoSet, nil
-}
-
-// TestSetCoinbaseMaturity makes the ability to set the coinbase maturity
-// available when running tests.
-func (dag *BlockDAG) TestSetCoinbaseMaturity(maturity uint64) {
-	dag.dagParams.BlockCoinbaseMaturity = maturity
-}
-
-// newTestDAG returns a DAG that is usable for syntetic tests.  It is
-// important to note that this chain has no database associated with it, so
-// it is not usable with all functions and the tests must take care when making
-// use of it.
-func newTestDAG(params *dagconfig.Params) *BlockDAG {
-	// Create a genesis block node and block index index populated with it
-	// for use when creating the fake chain below.
-	node := newBlockNode(&params.GenesisBlock.Header, newSet(), params.K)
-	index := newBlockIndex(nil, params)
-	index.AddNode(node)
-
-	targetTimePerBlock := int64(params.TargetTimePerBlock / time.Second)
-	return &BlockDAG{
-		dagParams:                      params,
-		timeSource:                     NewMedianTime(),
-		targetTimePerBlock:             targetTimePerBlock,
-		difficultyAdjustmentWindowSize: params.DifficultyAdjustmentWindowSize,
-		TimestampDeviationTolerance:    params.TimestampDeviationTolerance,
-		powMaxBits:                     util.BigToCompact(params.PowMax),
-		index:                          index,
-		virtual:                        newVirtualBlock(setFromSlice(node), params.K),
-		genesis:                        index.LookupNode(params.GenesisHash),
-		warningCaches:                  newThresholdCaches(vbNumBits),
-		deploymentCaches:               newThresholdCaches(dagconfig.DefinedDeployments),
-	}
-}
-
-// newTestNode creates a block node connected to the passed parent with the
-// provided fields populated and fake values for the other fields.
-func newTestNode(parents blockSet, blockVersion int32, bits uint32, timestamp time.Time, phantomK uint32) *blockNode {
-	// Make up a header and create a block node from it.
-	header := &wire.BlockHeader{
-		Version:              blockVersion,
-		ParentHashes:         parents.hashes(),
-		Bits:                 bits,
-		Timestamp:            timestamp,
-		HashMerkleRoot:       &daghash.ZeroHash,
-		AcceptedIDMerkleRoot: &daghash.ZeroHash,
-		UTXOCommitment:       &daghash.ZeroHash,
-	}
-	return newBlockNode(header, parents, phantomK)
-}
-
-func addNodeAsChildToParents(node *blockNode) {
-	for _, parent := range node.parents {
-		parent.children.add(node)
-	}
-}
-
-func buildNodeGenerator(phantomK uint32, withChildren bool) func(parents blockSet) *blockNode {
-	// For the purposes of these tests, we'll create blockNodes whose hashes are a
-	// series of numbers from 1 to 255.
-	hashCounter := byte(1)
-	buildNode := func(parents blockSet) *blockNode {
-		block := newBlockNode(nil, parents, phantomK)
-		block.hash = &daghash.Hash{hashCounter}
-		hashCounter++
-
-		return block
-	}
-	if withChildren {
-		return func(parents blockSet) *blockNode {
-			node := buildNode(parents)
-			addNodeAsChildToParents(node)
-			return node
-		}
-	}
-	return buildNode
-}
-
-// checkRuleError ensures the type of the two passed errors are of the
-// same type (either both nil or both of type RuleError) and their error codes
-// match when not nil.
-func checkRuleError(gotErr, wantErr error) error {
-	// Ensure the error code is of the expected type and the error
-	// code matches the value specified in the test instance.
-	if reflect.TypeOf(gotErr) != reflect.TypeOf(wantErr) {
-		return fmt.Errorf("wrong error - got %T (%[1]v), want %T",
-			gotErr, wantErr)
-	}
-	if gotErr == nil {
-		return nil
-	}
-
-	// Ensure the want error type is a script error.
-	werr, ok := wantErr.(RuleError)
-	if !ok {
-		return fmt.Errorf("unexpected test error type %T", wantErr)
-	}
-
-	// Ensure the error codes match.  It's safe to use a raw type assert
-	// here since the code above already proved they are the same type and
-	// the want error is a script error.
-	gotErrorCode := gotErr.(RuleError).ErrorCode
-	if gotErrorCode != werr.ErrorCode {
-		return fmt.Errorf("mismatched error code - got %v (%v), want %v",
-			gotErrorCode, gotErr, werr.ErrorCode)
-	}
-
-	return nil
-}

blockdag/compress.go

@@ -1,586 +0,0 @@
-// Copyright (c) 2015-2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"github.com/daglabs/btcd/btcec"
-	"github.com/daglabs/btcd/txscript"
-)
-
-// -----------------------------------------------------------------------------
-// A variable length quantity (VLQ) is an encoding that uses an arbitrary number
-// of binary octets to represent an arbitrarily large integer.  The scheme
-// employs a most significant byte (MSB) base-128 encoding where the high bit in
-// each byte indicates whether or not the byte is the final one.  In addition,
-// to ensure there are no redundant encodings, an offset is subtracted every
-// time a group of 7 bits is shifted out.  Therefore each integer can be
-// represented in exactly one way, and each representation stands for exactly
-// one integer.
-//
-// Another nice property of this encoding is that it provides a compact
-// representation of values that are typically used to indicate sizes.  For
-// example, the values 0 - 127 are represented with a single byte, 128 - 16511
-// with two bytes, and 16512 - 2113663 with three bytes.
-//
-// While the encoding allows arbitrarily large integers, it is artificially
-// limited in this code to an unsigned 64-bit integer for efficiency purposes.
-//
-// Example encodings:
-//           0 -> [0x00]
-//         127 -> [0x7f]                 * Max 1-byte value
-//         128 -> [0x80 0x00]
-//         129 -> [0x80 0x01]
-//         255 -> [0x80 0x7f]
-//         256 -> [0x81 0x00]
-//       16511 -> [0xff 0x7f]            * Max 2-byte value
-//       16512 -> [0x80 0x80 0x00]
-//       32895 -> [0x80 0xff 0x7f]
-//     2113663 -> [0xff 0xff 0x7f]       * Max 3-byte value
-//   270549119 -> [0xff 0xff 0xff 0x7f]  * Max 4-byte value
-//      2^64-1 -> [0x80 0xfe 0xfe 0xfe 0xfe 0xfe 0xfe 0xfe 0xfe 0x7f]
-//
-// References:
-//   https://en.wikipedia.org/wiki/Variable-length_quantity
-//   http://www.codecodex.com/wiki/Variable-Length_Integers
-// -----------------------------------------------------------------------------
-
-// serializeSizeVLQ returns the number of bytes it would take to serialize the
-// passed number as a variable-length quantity according to the format described
-// above.
-func serializeSizeVLQ(n uint64) int {
-	size := 1
-	for ; n > 0x7f; n = (n >> 7) - 1 {
-		size++
-	}
-
-	return size
-}
-
-// putVLQ serializes the provided number to a variable-length quantity according
-// to the format described above and returns the number of bytes of the encoded
-// value.  The result is placed directly into the passed byte slice which must
-// be at least large enough to handle the number of bytes returned by the
-// serializeSizeVLQ function or it will panic.
-func putVLQ(target []byte, n uint64) int {
-	offset := 0
-	for ; ; offset++ {
-		// The high bit is set when another byte follows.
-		highBitMask := byte(0x80)
-		if offset == 0 {
-			highBitMask = 0x00
-		}
-
-		target[offset] = byte(n&0x7f) | highBitMask
-		if n <= 0x7f {
-			break
-		}
-		n = (n >> 7) - 1
-	}
-
-	// Reverse the bytes so it is MSB-encoded.
-	for i, j := 0, offset; i < j; i, j = i+1, j-1 {
-		target[i], target[j] = target[j], target[i]
-	}
-
-	return offset + 1
-}
-
-// deserializeVLQ deserializes the provided variable-length quantity according
-// to the format described above.  It also returns the number of bytes
-// deserialized.
-func deserializeVLQ(serialized []byte) (uint64, int) {
-	var n uint64
-	var size int
-	for _, val := range serialized {
-		size++
-		n = (n << 7) | uint64(val&0x7f)
-		if val&0x80 != 0x80 {
-			break
-		}
-		n++
-	}
-
-	return n, size
-}
-
-// -----------------------------------------------------------------------------
-// In order to reduce the size of stored scripts, a domain specific compression
-// algorithm is used which recognizes standard scripts and stores them using
-// less bytes than the original script.  The compression algorithm used here was
-// obtained from Bitcoin Core, so all credits for the algorithm go to it.
-//
-// The general serialized format is:
-//
-//   <script size or type><script data>
-//
-//   Field                 Type     Size
-//   script size or type   VLQ      variable
-//   script data           []byte   variable
-//
-// The specific serialized format for each recognized standard script is:
-//
-// - Pay-to-pubkey-hash: (21 bytes) - <0><20-byte pubkey hash>
-// - Pay-to-script-hash: (21 bytes) - <1><20-byte script hash>
-// - Pay-to-pubkey**:    (33 bytes) - <2, 3, 4, or 5><32-byte pubkey X value>
-//   2, 3 = compressed pubkey with bit 0 specifying the y coordinate to use
-//   4, 5 = uncompressed pubkey with bit 0 specifying the y coordinate to use
-//   ** Only valid public keys starting with 0x02, 0x03, and 0x04 are supported.
-//
-// Any scripts which are not recognized as one of the aforementioned standard
-// scripts are encoded using the general serialized format and encode the script
-// size as the sum of the actual size of the script and the number of special
-// cases.
-// -----------------------------------------------------------------------------
-
-// The following constants specify the special constants used to identify a
-// special script type in the domain-specific compressed script encoding.
-//
-// NOTE: This section specifically does not use iota since these values are
-// serialized and must be stable for long-term storage.
-const (
-	// cstPayToPubKeyHash identifies a compressed pay-to-pubkey-hash script.
-	cstPayToPubKeyHash = 0
-
-	// cstPayToScriptHash identifies a compressed pay-to-script-hash script.
-	cstPayToScriptHash = 1
-
-	// cstPayToPubKeyComp2 identifies a compressed pay-to-pubkey script to
-	// a compressed pubkey.  Bit 0 specifies which y-coordinate to use
-	// to reconstruct the full uncompressed pubkey.
-	cstPayToPubKeyComp2 = 2
-
-	// cstPayToPubKeyComp3 identifies a compressed pay-to-pubkey script to
-	// a compressed pubkey.  Bit 0 specifies which y-coordinate to use
-	// to reconstruct the full uncompressed pubkey.
-	cstPayToPubKeyComp3 = 3
-
-	// cstPayToPubKeyUncomp4 identifies a compressed pay-to-pubkey script to
-	// an uncompressed pubkey.  Bit 0 specifies which y-coordinate to use
-	// to reconstruct the full uncompressed pubkey.
-	cstPayToPubKeyUncomp4 = 4
-
-	// cstPayToPubKeyUncomp5 identifies a compressed pay-to-pubkey script to
-	// an uncompressed pubkey.  Bit 0 specifies which y-coordinate to use
-	// to reconstruct the full uncompressed pubkey.
-	cstPayToPubKeyUncomp5 = 5
-
-	// numSpecialScripts is the number of special scripts recognized by the
-	// domain-specific script compression algorithm.
-	numSpecialScripts = 6
-)
-
-// isPubKeyHash returns whether or not the passed public key script is a
-// standard pay-to-pubkey-hash script along with the pubkey hash it is paying to
-// if it is.
-func isPubKeyHash(script []byte) (bool, []byte) {
-	if len(script) == 25 && script[0] == txscript.OpDup &&
-		script[1] == txscript.OpHash160 &&
-		script[2] == txscript.OpData20 &&
-		script[23] == txscript.OpEqualVerify &&
-		script[24] == txscript.OpCheckSig {
-
-		return true, script[3:23]
-	}
-
-	return false, nil
-}
-
-// isScriptHash returns whether or not the passed public key script is a
-// standard pay-to-script-hash script along with the script hash it is paying to
-// if it is.
-func isScriptHash(script []byte) (bool, []byte) {
-	if len(script) == 23 && script[0] == txscript.OpHash160 &&
-		script[1] == txscript.OpData20 &&
-		script[22] == txscript.OpEqual {
-
-		return true, script[2:22]
-	}
-
-	return false, nil
-}
-
-// isPubKey returns whether or not the passed public key script is a standard
-// pay-to-pubkey script that pays to a valid compressed or uncompressed public
-// key along with the serialized pubkey it is paying to if it is.
-//
-// NOTE: This function ensures the public key is actually valid since the
-// compression algorithm requires valid pubkeys.  It does not support hybrid
-// pubkeys.  This means that even if the script has the correct form for a
-// pay-to-pubkey script, this function will only return true when it is paying
-// to a valid compressed or uncompressed pubkey.
-func isPubKey(script []byte) (bool, []byte) {
-	// Pay-to-compressed-pubkey script.
-	if len(script) == 35 && script[0] == txscript.OpData33 &&
-		script[34] == txscript.OpCheckSig && (script[1] == 0x02 ||
-		script[1] == 0x03) {
-
-		// Ensure the public key is valid.
-		serializedPubKey := script[1:34]
-		_, err := btcec.ParsePubKey(serializedPubKey, btcec.S256())
-		if err == nil {
-			return true, serializedPubKey
-		}
-	}
-
-	// Pay-to-uncompressed-pubkey script.
-	if len(script) == 67 && script[0] == txscript.OpData65 &&
-		script[66] == txscript.OpCheckSig && script[1] == 0x04 {
-
-		// Ensure the public key is valid.
-		serializedPubKey := script[1:66]
-		_, err := btcec.ParsePubKey(serializedPubKey, btcec.S256())
-		if err == nil {
-			return true, serializedPubKey
-		}
-	}
-
-	return false, nil
-}
-
-// compressedScriptSize returns the number of bytes the passed script would take
-// when encoded with the domain specific compression algorithm described above.
-func compressedScriptSize(scriptPubKey []byte) int {
-	// Pay-to-pubkey-hash script.
-	if valid, _ := isPubKeyHash(scriptPubKey); valid {
-		return 21
-	}
-
-	// Pay-to-script-hash script.
-	if valid, _ := isScriptHash(scriptPubKey); valid {
-		return 21
-	}
-
-	// Pay-to-pubkey (compressed or uncompressed) script.
-	if valid, _ := isPubKey(scriptPubKey); valid {
-		return 33
-	}
-
-	// When none of the above special cases apply, encode the script as is
-	// preceded by the sum of its size and the number of special cases
-	// encoded as a variable length quantity.
-	return serializeSizeVLQ(uint64(len(scriptPubKey)+numSpecialScripts)) +
-		len(scriptPubKey)
-}
-
-// decodeCompressedScriptSize treats the passed serialized bytes as a compressed
-// script, possibly followed by other data, and returns the number of bytes it
-// occupies taking into account the special encoding of the script size by the
-// domain specific compression algorithm described above.
-func decodeCompressedScriptSize(serialized []byte) int {
-	scriptSize, bytesRead := deserializeVLQ(serialized)
-	if bytesRead == 0 {
-		return 0
-	}
-
-	switch scriptSize {
-	case cstPayToPubKeyHash:
-		return 21
-
-	case cstPayToScriptHash:
-		return 21
-
-	case cstPayToPubKeyComp2, cstPayToPubKeyComp3, cstPayToPubKeyUncomp4,
-		cstPayToPubKeyUncomp5:
-		return 33
-	}
-
-	scriptSize -= numSpecialScripts
-	scriptSize += uint64(bytesRead)
-	return int(scriptSize)
-}
-
-// putCompressedScript compresses the passed script according to the domain
-// specific compression algorithm described above directly into the passed
-// target byte slice.  The target byte slice must be at least large enough to
-// handle the number of bytes returned by the compressedScriptSize function or
-// it will panic.
-func putCompressedScript(target, scriptPubKey []byte) int {
-	// Pay-to-pubkey-hash script.
-	if valid, hash := isPubKeyHash(scriptPubKey); valid {
-		target[0] = cstPayToPubKeyHash
-		copy(target[1:21], hash)
-		return 21
-	}
-
-	// Pay-to-script-hash script.
-	if valid, hash := isScriptHash(scriptPubKey); valid {
-		target[0] = cstPayToScriptHash
-		copy(target[1:21], hash)
-		return 21
-	}
-
-	// Pay-to-pubkey (compressed or uncompressed) script.
-	if valid, serializedPubKey := isPubKey(scriptPubKey); valid {
-		pubKeyFormat := serializedPubKey[0]
-		switch pubKeyFormat {
-		case 0x02, 0x03:
-			target[0] = pubKeyFormat
-			copy(target[1:33], serializedPubKey[1:33])
-			return 33
-		case 0x04:
-			// Encode the oddness of the serialized pubkey into the
-			// compressed script type.
-			target[0] = pubKeyFormat | (serializedPubKey[64] & 0x01)
-			copy(target[1:33], serializedPubKey[1:33])
-			return 33
-		}
-	}
-
-	// When none of the above special cases apply, encode the unmodified
-	// script preceded by the sum of its size and the number of special
-	// cases encoded as a variable length quantity.
-	encodedSize := uint64(len(scriptPubKey) + numSpecialScripts)
-	vlqSizeLen := putVLQ(target, encodedSize)
-	copy(target[vlqSizeLen:], scriptPubKey)
-	return vlqSizeLen + len(scriptPubKey)
-}
-
-// decompressScript returns the original script obtained by decompressing the
-// passed compressed script according to the domain specific compression
-// algorithm described above.
-//
-// NOTE: The script parameter must already have been proven to be long enough
-// to contain the number of bytes returned by decodeCompressedScriptSize or it
-// will panic.  This is acceptable since it is only an internal function.
-func decompressScript(compressedScriptPubKey []byte) []byte {
-	// In practice this function will not be called with a zero-length or
-	// nil script since the nil script encoding includes the length, however
-	// the code below assumes the length exists, so just return nil now if
-	// the function ever ends up being called with a nil script in the
-	// future.
-	if len(compressedScriptPubKey) == 0 {
-		return nil
-	}
-
-	// Decode the script size and examine it for the special cases.
-	encodedScriptSize, bytesRead := deserializeVLQ(compressedScriptPubKey)
-	switch encodedScriptSize {
-	// Pay-to-pubkey-hash script.  The resulting script is:
-	// <OP_DUP><OP_HASH160><20 byte hash><OP_EQUALVERIFY><OP_CHECKSIG>
-	case cstPayToPubKeyHash:
-		scriptPubKey := make([]byte, 25)
-		scriptPubKey[0] = txscript.OpDup
-		scriptPubKey[1] = txscript.OpHash160
-		scriptPubKey[2] = txscript.OpData20
-		copy(scriptPubKey[3:], compressedScriptPubKey[bytesRead:bytesRead+20])
-		scriptPubKey[23] = txscript.OpEqualVerify
-		scriptPubKey[24] = txscript.OpCheckSig
-		return scriptPubKey
-
-	// Pay-to-script-hash script.  The resulting script is:
-	// <OP_HASH160><20 byte script hash><OP_EQUAL>
-	case cstPayToScriptHash:
-		scriptPubKey := make([]byte, 23)
-		scriptPubKey[0] = txscript.OpHash160
-		scriptPubKey[1] = txscript.OpData20
-		copy(scriptPubKey[2:], compressedScriptPubKey[bytesRead:bytesRead+20])
-		scriptPubKey[22] = txscript.OpEqual
-		return scriptPubKey
-
-	// Pay-to-compressed-pubkey script.  The resulting script is:
-	// <OP_DATA_33><33 byte compressed pubkey><OP_CHECKSIG>
-	case cstPayToPubKeyComp2, cstPayToPubKeyComp3:
-		scriptPubKey := make([]byte, 35)
-		scriptPubKey[0] = txscript.OpData33
-		scriptPubKey[1] = byte(encodedScriptSize)
-		copy(scriptPubKey[2:], compressedScriptPubKey[bytesRead:bytesRead+32])
-		scriptPubKey[34] = txscript.OpCheckSig
-		return scriptPubKey
-
-	// Pay-to-uncompressed-pubkey script.  The resulting script is:
-	// <OP_DATA_65><65 byte uncompressed pubkey><OP_CHECKSIG>
-	case cstPayToPubKeyUncomp4, cstPayToPubKeyUncomp5:
-		// Change the leading byte to the appropriate compressed pubkey
-		// identifier (0x02 or 0x03) so it can be decoded as a
-		// compressed pubkey.  This really should never fail since the
-		// encoding ensures it is valid before compressing to this type.
-		compressedKey := make([]byte, 33)
-		compressedKey[0] = byte(encodedScriptSize - 2)
-		copy(compressedKey[1:], compressedScriptPubKey[1:])
-		key, err := btcec.ParsePubKey(compressedKey, btcec.S256())
-		if err != nil {
-			return nil
-		}
-
-		scriptPubKey := make([]byte, 67)
-		scriptPubKey[0] = txscript.OpData65
-		copy(scriptPubKey[1:], key.SerializeUncompressed())
-		scriptPubKey[66] = txscript.OpCheckSig
-		return scriptPubKey
-	}
-
-	// When none of the special cases apply, the script was encoded using
-	// the general format, so reduce the script size by the number of
-	// special cases and return the unmodified script.
-	scriptSize := int(encodedScriptSize - numSpecialScripts)
-	scriptPubKey := make([]byte, scriptSize)
-	copy(scriptPubKey, compressedScriptPubKey[bytesRead:bytesRead+scriptSize])
-	return scriptPubKey
-}
-
-// -----------------------------------------------------------------------------
-// In order to reduce the size of stored amounts, a domain specific compression
-// algorithm is used which relies on there typically being a lot of zeroes at
-// end of the amounts.  The compression algorithm used here was obtained from
-// Bitcoin Core, so all credits for the algorithm go to it.
-//
-// While this is simply exchanging one uint64 for another, the resulting value
-// for typical amounts has a much smaller magnitude which results in fewer bytes
-// when encoded as variable length quantity.  For example, consider the amount
-// of 0.1 BTC which is 10000000 satoshi.  Encoding 10000000 as a VLQ would take
-// 4 bytes while encoding the compressed value of 8 as a VLQ only takes 1 byte.
-//
-// Essentially the compression is achieved by splitting the value into an
-// exponent in the range [0-9] and a digit in the range [1-9], when possible,
-// and encoding them in a way that can be decoded.  More specifically, the
-// encoding is as follows:
-// - 0 is 0
-// - Find the exponent, e, as the largest power of 10 that evenly divides the
-//   value up to a maximum of 9
-// - When e < 9, the final digit can't be 0 so store it as d and remove it by
-//   dividing the value by 10 (call the result n).  The encoded value is thus:
-//   1 + 10*(9*n + d-1) + e
-// - When e==9, the only thing known is the amount is not 0.  The encoded value
-//   is thus:
-//   1 + 10*(n-1) + e   ==   10 + 10*(n-1)
-//
-// Example encodings:
-// (The numbers in parenthesis are the number of bytes when serialized as a VLQ)
-//            0 (1) -> 0        (1)           *  0.00000000 BTC
-//         1000 (2) -> 4        (1)           *  0.00001000 BTC
-//        10000 (2) -> 5        (1)           *  0.00010000 BTC
-//     12345678 (4) -> 111111101(4)           *  0.12345678 BTC
-//     50000000 (4) -> 47       (1)           *  0.50000000 BTC
-//    100000000 (4) -> 9        (1)           *  1.00000000 BTC
-//    500000000 (5) -> 49       (1)           *  5.00000000 BTC
-//   1000000000 (5) -> 10       (1)           * 10.00000000 BTC
-// -----------------------------------------------------------------------------
-
-// compressTxOutAmount compresses the passed amount according to the domain
-// specific compression algorithm described above.
-func compressTxOutAmount(amount uint64) uint64 {
-	// No need to do any work if it's zero.
-	if amount == 0 {
-		return 0
-	}
-
-	// Find the largest power of 10 (max of 9) that evenly divides the
-	// value.
-	exponent := uint64(0)
-	for amount%10 == 0 && exponent < 9 {
-		amount /= 10
-		exponent++
-	}
-
-	// The compressed result for exponents less than 9 is:
-	// 1 + 10*(9*n + d-1) + e
-	if exponent < 9 {
-		lastDigit := amount % 10
-		amount /= 10
-		return 1 + 10*(9*amount+lastDigit-1) + exponent
-	}
-
-	// The compressed result for an exponent of 9 is:
-	// 1 + 10*(n-1) + e   ==   10 + 10*(n-1)
-	return 10 + 10*(amount-1)
-}
-
-// decompressTxOutAmount returns the original amount the passed compressed
-// amount represents according to the domain specific compression algorithm
-// described above.
-func decompressTxOutAmount(amount uint64) uint64 {
-	// No need to do any work if it's zero.
-	if amount == 0 {
-		return 0
-	}
-
-	// The decompressed amount is either of the following two equations:
-	// x = 1 + 10*(9*n + d - 1) + e
-	// x = 1 + 10*(n - 1)       + 9
-	amount--
-
-	// The decompressed amount is now one of the following two equations:
-	// x = 10*(9*n + d - 1) + e
-	// x = 10*(n - 1)       + 9
-	exponent := amount % 10
-	amount /= 10
-
-	// The decompressed amount is now one of the following two equations:
-	// x = 9*n + d - 1  | where e < 9
-	// x = n - 1        | where e = 9
-	n := uint64(0)
-	if exponent < 9 {
-		lastDigit := amount%9 + 1
-		amount /= 9
-		n = amount*10 + lastDigit
-	} else {
-		n = amount + 1
-	}
-
-	// Apply the exponent.
-	for ; exponent > 0; exponent-- {
-		n *= 10
-	}
-
-	return n
-}
-
-// -----------------------------------------------------------------------------
-// Compressed transaction outputs consist of an amount and a public key script
-// both compressed using the domain specific compression algorithms previously
-// described.
-//
-// The serialized format is:
-//
-//   <compressed amount><compressed script>
-//
-//   Field                 Type     Size
-//     compressed amount   VLQ      variable
-//     compressed script   []byte   variable
-// -----------------------------------------------------------------------------
-
-// compressedTxOutSize returns the number of bytes the passed transaction output
-// fields would take when encoded with the format described above.
-func compressedTxOutSize(amount uint64, scriptPubKey []byte) int {
-	return serializeSizeVLQ(compressTxOutAmount(amount)) +
-		compressedScriptSize(scriptPubKey)
-}
-
-// putCompressedTxOut compresses the passed amount and script according to their
-// domain specific compression algorithms and encodes them directly into the
-// passed target byte slice with the format described above.  The target byte
-// slice must be at least large enough to handle the number of bytes returned by
-// the compressedTxOutSize function or it will panic.
-func putCompressedTxOut(target []byte, amount uint64, scriptPubKey []byte) int {
-	offset := putVLQ(target, compressTxOutAmount(amount))
-	offset += putCompressedScript(target[offset:], scriptPubKey)
-	return offset
-}
-
-// decodeCompressedTxOut decodes the passed compressed txout, possibly followed
-// by other data, into its uncompressed amount and script and returns them along
-// with the number of bytes they occupied prior to decompression.
-func decodeCompressedTxOut(serialized []byte) (uint64, []byte, int, error) {
-	// Deserialize the compressed amount and ensure there are bytes
-	// remaining for the compressed script.
-	compressedAmount, bytesRead := deserializeVLQ(serialized)
-	if bytesRead >= len(serialized) {
-		return 0, nil, bytesRead, errDeserialize("unexpected end of " +
-			"data after compressed amount")
-	}
-
-	// Decode the compressed script size and ensure there are enough bytes
-	// left in the slice for it.
-	scriptSize := decodeCompressedScriptSize(serialized[bytesRead:])
-	if len(serialized[bytesRead:]) < scriptSize {
-		return 0, nil, bytesRead, errDeserialize("unexpected end of " +
-			"data after script size")
-	}
-
-	// Decompress and return the amount and script.
-	amount := decompressTxOutAmount(compressedAmount)
-	script := decompressScript(serialized[bytesRead : bytesRead+scriptSize])
-	return amount, script, bytesRead + scriptSize, nil
-}

blockdag/compress_test.go

@@ -1,436 +0,0 @@
-// Copyright (c) 2015-2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"bytes"
-	"encoding/hex"
-	"testing"
-)
-
-// hexToBytes converts the passed hex string into bytes and will panic if there
-// is an error.  This is only provided for the hard-coded constants so errors in
-// the source code can be detected. It will only (and must only) be called with
-// hard-coded values.
-func hexToBytes(s string) []byte {
-	b, err := hex.DecodeString(s)
-	if err != nil {
-		panic("invalid hex in source file: " + s)
-	}
-	return b
-}
-
-// TestVLQ ensures the variable length quantity serialization, deserialization,
-// and size calculation works as expected.
-func TestVLQ(t *testing.T) {
-	t.Parallel()
-
-	tests := []struct {
-		val        uint64
-		serialized []byte
-	}{
-		{0, hexToBytes("00")},
-		{1, hexToBytes("01")},
-		{127, hexToBytes("7f")},
-		{128, hexToBytes("8000")},
-		{129, hexToBytes("8001")},
-		{255, hexToBytes("807f")},
-		{256, hexToBytes("8100")},
-		{16383, hexToBytes("fe7f")},
-		{16384, hexToBytes("ff00")},
-		{16511, hexToBytes("ff7f")}, // Max 2-byte value
-		{16512, hexToBytes("808000")},
-		{16513, hexToBytes("808001")},
-		{16639, hexToBytes("80807f")},
-		{32895, hexToBytes("80ff7f")},
-		{2113663, hexToBytes("ffff7f")}, // Max 3-byte value
-		{2113664, hexToBytes("80808000")},
-		{270549119, hexToBytes("ffffff7f")}, // Max 4-byte value
-		{270549120, hexToBytes("8080808000")},
-		{2147483647, hexToBytes("86fefefe7f")},
-		{2147483648, hexToBytes("86fefeff00")},
-		{4294967295, hexToBytes("8efefefe7f")}, // Max uint32, 5 bytes
-		// Max uint64, 10 bytes
-		{18446744073709551615, hexToBytes("80fefefefefefefefe7f")},
-	}
-
-	for _, test := range tests {
-		// Ensure the function to calculate the serialized size without
-		// actually serializing the value is calculated properly.
-		gotSize := serializeSizeVLQ(test.val)
-		if gotSize != len(test.serialized) {
-			t.Errorf("serializeSizeVLQ: did not get expected size "+
-				"for %d - got %d, want %d", test.val, gotSize,
-				len(test.serialized))
-			continue
-		}
-
-		// Ensure the value serializes to the expected bytes.
-		gotBytes := make([]byte, gotSize)
-		gotBytesWritten := putVLQ(gotBytes, test.val)
-		if !bytes.Equal(gotBytes, test.serialized) {
-			t.Errorf("putVLQUnchecked: did not get expected bytes "+
-				"for %d - got %x, want %x", test.val, gotBytes,
-				test.serialized)
-			continue
-		}
-		if gotBytesWritten != len(test.serialized) {
-			t.Errorf("putVLQUnchecked: did not get expected number "+
-				"of bytes written for %d - got %d, want %d",
-				test.val, gotBytesWritten, len(test.serialized))
-			continue
-		}
-
-		// Ensure the serialized bytes deserialize to the expected
-		// value.
-		gotVal, gotBytesRead := deserializeVLQ(test.serialized)
-		if gotVal != test.val {
-			t.Errorf("deserializeVLQ: did not get expected value "+
-				"for %x - got %d, want %d", test.serialized,
-				gotVal, test.val)
-			continue
-		}
-		if gotBytesRead != len(test.serialized) {
-			t.Errorf("deserializeVLQ: did not get expected number "+
-				"of bytes read for %d - got %d, want %d",
-				test.serialized, gotBytesRead,
-				len(test.serialized))
-			continue
-		}
-	}
-}
-
-// TestScriptCompression ensures the domain-specific script compression and
-// decompression works as expected.
-func TestScriptCompression(t *testing.T) {
-	t.Parallel()
-
-	tests := []struct {
-		name         string
-		uncompressed []byte
-		compressed   []byte
-	}{
-		{
-			name:         "nil",
-			uncompressed: nil,
-			compressed:   hexToBytes("06"),
-		},
-		{
-			name:         "pay-to-pubkey-hash 1",
-			uncompressed: hexToBytes("76a9141018853670f9f3b0582c5b9ee8ce93764ac32b9388ac"),
-			compressed:   hexToBytes("001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
-		},
-		{
-			name:         "pay-to-pubkey-hash 2",
-			uncompressed: hexToBytes("76a914e34cce70c86373273efcc54ce7d2a491bb4a0e8488ac"),
-			compressed:   hexToBytes("00e34cce70c86373273efcc54ce7d2a491bb4a0e84"),
-		},
-		{
-			name:         "pay-to-script-hash 1",
-			uncompressed: hexToBytes("a914da1745e9b549bd0bfa1a569971c77eba30cd5a4b87"),
-			compressed:   hexToBytes("01da1745e9b549bd0bfa1a569971c77eba30cd5a4b"),
-		},
-		{
-			name:         "pay-to-script-hash 2",
-			uncompressed: hexToBytes("a914f815b036d9bbbce5e9f2a00abd1bf3dc91e9551087"),
-			compressed:   hexToBytes("01f815b036d9bbbce5e9f2a00abd1bf3dc91e95510"),
-		},
-		{
-			name:         "pay-to-pubkey compressed 0x02",
-			uncompressed: hexToBytes("2102192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b4ac"),
-			compressed:   hexToBytes("02192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b4"),
-		},
-		{
-			name:         "pay-to-pubkey compressed 0x03",
-			uncompressed: hexToBytes("2103b0bd634234abbb1ba1e986e884185c61cf43e001f9137f23c2c409273eb16e65ac"),
-			compressed:   hexToBytes("03b0bd634234abbb1ba1e986e884185c61cf43e001f9137f23c2c409273eb16e65"),
-		},
-		{
-			name:         "pay-to-pubkey uncompressed 0x04 even",
-			uncompressed: hexToBytes("4104192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b40d45264838c0bd96852662ce6a847b197376830160c6d2eb5e6a4c44d33f453eac"),
-			compressed:   hexToBytes("04192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b4"),
-		},
-		{
-			name:         "pay-to-pubkey uncompressed 0x04 odd",
-			uncompressed: hexToBytes("410411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3ac"),
-			compressed:   hexToBytes("0511db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5c"),
-		},
-		{
-			name:         "pay-to-pubkey invalid pubkey",
-			uncompressed: hexToBytes("3302aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaac"),
-			compressed:   hexToBytes("293302aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaac"),
-		},
-		{
-			name:         "requires 2 size bytes - data push 200 bytes",
-			uncompressed: append(hexToBytes("4cc8"), bytes.Repeat([]byte{0x00}, 200)...),
-			// [0x80, 0x50] = 208 as a variable length quantity
-			// [0x4c, 0xc8] = OP_PUSHDATA1 200
-			compressed: append(hexToBytes("80504cc8"), bytes.Repeat([]byte{0x00}, 200)...),
-		},
-	}
-
-	for _, test := range tests {
-		// Ensure the function to calculate the serialized size without
-		// actually serializing the value is calculated properly.
-		gotSize := compressedScriptSize(test.uncompressed)
-		if gotSize != len(test.compressed) {
-			t.Errorf("compressedScriptSize (%s): did not get "+
-				"expected size - got %d, want %d", test.name,
-				gotSize, len(test.compressed))
-			continue
-		}
-
-		// Ensure the script compresses to the expected bytes.
-		gotCompressed := make([]byte, gotSize)
-		gotBytesWritten := putCompressedScript(gotCompressed,
-			test.uncompressed)
-		if !bytes.Equal(gotCompressed, test.compressed) {
-			t.Errorf("putCompressedScript (%s): did not get "+
-				"expected bytes - got %x, want %x", test.name,
-				gotCompressed, test.compressed)
-			continue
-		}
-		if gotBytesWritten != len(test.compressed) {
-			t.Errorf("putCompressedScript (%s): did not get "+
-				"expected number of bytes written - got %d, "+
-				"want %d", test.name, gotBytesWritten,
-				len(test.compressed))
-			continue
-		}
-
-		// Ensure the compressed script size is properly decoded from
-		// the compressed script.
-		gotDecodedSize := decodeCompressedScriptSize(test.compressed)
-		if gotDecodedSize != len(test.compressed) {
-			t.Errorf("decodeCompressedScriptSize (%s): did not get "+
-				"expected size - got %d, want %d", test.name,
-				gotDecodedSize, len(test.compressed))
-			continue
-		}
-
-		// Ensure the script decompresses to the expected bytes.
-		gotDecompressed := decompressScript(test.compressed)
-		if !bytes.Equal(gotDecompressed, test.uncompressed) {
-			t.Errorf("decompressScript (%s): did not get expected "+
-				"bytes - got %x, want %x", test.name,
-				gotDecompressed, test.uncompressed)
-			continue
-		}
-	}
-}
-
-// TestScriptCompressionErrors ensures calling various functions related to
-// script compression with incorrect data returns the expected results.
-func TestScriptCompressionErrors(t *testing.T) {
-	t.Parallel()
-
-	// A nil script must result in a decoded size of 0.
-	if gotSize := decodeCompressedScriptSize(nil); gotSize != 0 {
-		t.Fatalf("decodeCompressedScriptSize with nil script did not "+
-			"return 0 - got %d", gotSize)
-	}
-
-	// A nil script must result in a nil decompressed script.
-	if gotScript := decompressScript(nil); gotScript != nil {
-		t.Fatalf("decompressScript with nil script did not return nil "+
-			"decompressed script - got %x", gotScript)
-	}
-
-	// A compressed script for a pay-to-pubkey (uncompressed) that results
-	// in an invalid pubkey must result in a nil decompressed script.
-	compressedScript := hexToBytes("04012d74d0cb94344c9569c2e77901573d8d" +
-		"7903c3ebec3a957724895dca52c6b4")
-	if gotScript := decompressScript(compressedScript); gotScript != nil {
-		t.Fatalf("decompressScript with compressed pay-to-"+
-			"uncompressed-pubkey that is invalid did not return "+
-			"nil decompressed script - got %x", gotScript)
-	}
-}
-
-// TestAmountCompression ensures the domain-specific transaction output amount
-// compression and decompression works as expected.
-func TestAmountCompression(t *testing.T) {
-	t.Parallel()
-
-	tests := []struct {
-		name         string
-		uncompressed uint64
-		compressed   uint64
-	}{
-		{
-			name:         "0 BTC",
-			uncompressed: 0,
-			compressed:   0,
-		},
-		{
-			name:         "546 Satoshi (current network dust value)",
-			uncompressed: 546,
-			compressed:   4911,
-		},
-		{
-			name:         "0.00001 BTC (typical transaction fee)",
-			uncompressed: 1000,
-			compressed:   4,
-		},
-		{
-			name:         "0.0001 BTC (typical transaction fee)",
-			uncompressed: 10000,
-			compressed:   5,
-		},
-		{
-			name:         "0.12345678 BTC",
-			uncompressed: 12345678,
-			compressed:   111111101,
-		},
-		{
-			name:         "0.5 BTC",
-			uncompressed: 50000000,
-			compressed:   48,
-		},
-		{
-			name:         "1 BTC",
-			uncompressed: 100000000,
-			compressed:   9,
-		},
-		{
-			name:         "5 BTC",
-			uncompressed: 500000000,
-			compressed:   49,
-		},
-		{
-			name:         "21000000 BTC (max minted coins)",
-			uncompressed: 2100000000000000,
-			compressed:   21000000,
-		},
-	}
-
-	for _, test := range tests {
-		// Ensure the amount compresses to the expected value.
-		gotCompressed := compressTxOutAmount(test.uncompressed)
-		if gotCompressed != test.compressed {
-			t.Errorf("compressTxOutAmount (%s): did not get "+
-				"expected value - got %d, want %d", test.name,
-				gotCompressed, test.compressed)
-			continue
-		}
-
-		// Ensure the value decompresses to the expected value.
-		gotDecompressed := decompressTxOutAmount(test.compressed)
-		if gotDecompressed != test.uncompressed {
-			t.Errorf("decompressTxOutAmount (%s): did not get "+
-				"expected value - got %d, want %d", test.name,
-				gotDecompressed, test.uncompressed)
-			continue
-		}
-	}
-}
-
-// TestCompressedTxOut ensures the transaction output serialization and
-// deserialization works as expected.
-func TestCompressedTxOut(t *testing.T) {
-	t.Parallel()
-
-	tests := []struct {
-		name         string
-		amount       uint64
-		scriptPubKey []byte
-		compressed   []byte
-	}{
-		{
-			name:         "pay-to-pubkey-hash dust",
-			amount:       546,
-			scriptPubKey: hexToBytes("76a9141018853670f9f3b0582c5b9ee8ce93764ac32b9388ac"),
-			compressed:   hexToBytes("a52f001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
-		},
-		{
-			name:         "pay-to-pubkey uncompressed 1 BTC",
-			amount:       100000000,
-			scriptPubKey: hexToBytes("4104192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b40d45264838c0bd96852662ce6a847b197376830160c6d2eb5e6a4c44d33f453eac"),
-			compressed:   hexToBytes("0904192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b4"),
-		},
-	}
-
-	for _, test := range tests {
-		// Ensure the function to calculate the serialized size without
-		// actually serializing the txout is calculated properly.
-		gotSize := compressedTxOutSize(test.amount, test.scriptPubKey)
-		if gotSize != len(test.compressed) {
-			t.Errorf("compressedTxOutSize (%s): did not get "+
-				"expected size - got %d, want %d", test.name,
-				gotSize, len(test.compressed))
-			continue
-		}
-
-		// Ensure the txout compresses to the expected value.
-		gotCompressed := make([]byte, gotSize)
-		gotBytesWritten := putCompressedTxOut(gotCompressed,
-			test.amount, test.scriptPubKey)
-		if !bytes.Equal(gotCompressed, test.compressed) {
-			t.Errorf("compressTxOut (%s): did not get expected "+
-				"bytes - got %x, want %x", test.name,
-				gotCompressed, test.compressed)
-			continue
-		}
-		if gotBytesWritten != len(test.compressed) {
-			t.Errorf("compressTxOut (%s): did not get expected "+
-				"number of bytes written - got %d, want %d",
-				test.name, gotBytesWritten,
-				len(test.compressed))
-			continue
-		}
-
-		// Ensure the serialized bytes are decoded back to the expected
-		// uncompressed values.
-		gotAmount, gotScript, gotBytesRead, err := decodeCompressedTxOut(
-			test.compressed)
-		if err != nil {
-			t.Errorf("decodeCompressedTxOut (%s): unexpected "+
-				"error: %v", test.name, err)
-			continue
-		}
-		if gotAmount != test.amount {
-			t.Errorf("decodeCompressedTxOut (%s): did not get "+
-				"expected amount - got %d, want %d",
-				test.name, gotAmount, test.amount)
-			continue
-		}
-		if !bytes.Equal(gotScript, test.scriptPubKey) {
-			t.Errorf("decodeCompressedTxOut (%s): did not get "+
-				"expected script - got %x, want %x",
-				test.name, gotScript, test.scriptPubKey)
-			continue
-		}
-		if gotBytesRead != len(test.compressed) {
-			t.Errorf("decodeCompressedTxOut (%s): did not get "+
-				"expected number of bytes read - got %d, want %d",
-				test.name, gotBytesRead, len(test.compressed))
-			continue
-		}
-	}
-}
-
-// TestTxOutCompressionErrors ensures calling various functions related to
-// txout compression with incorrect data returns the expected results.
-func TestTxOutCompressionErrors(t *testing.T) {
-	t.Parallel()
-
-	// A compressed txout with missing compressed script must error.
-	compressedTxOut := hexToBytes("00")
-	_, _, _, err := decodeCompressedTxOut(compressedTxOut)
-	if !isDeserializeErr(err) {
-		t.Fatalf("decodeCompressedTxOut with missing compressed script "+
-			"did not return expected error type - got %T, want "+
-			"errDeserialize", err)
-	}
-
-	// A compressed txout with short compressed script must error.
-	compressedTxOut = hexToBytes("0010")
-	_, _, _, err = decodeCompressedTxOut(compressedTxOut)
-	if !isDeserializeErr(err) {
-		t.Fatalf("decodeCompressedTxOut with short compressed script "+
-			"did not return expected error type - got %T, want "+
-			"errDeserialize", err)
-	}
-}

blockdag/dagio.go

@@ -1,854 +0,0 @@
-// Copyright (c) 2015-2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"bytes"
-	"encoding/binary"
-	"encoding/json"
-	"fmt"
-	"io"
-	"sync"
-
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/binaryserializer"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/util/subnetworkid"
-	"github.com/daglabs/btcd/wire"
-)
-
-const (
-	// blockHdrSize is the size of a block header.  This is simply the
-	// constant from wire and is only provided here for convenience since
-	// wire.MaxBlockHeaderPayload is quite long.
-	blockHdrSize = wire.MaxBlockHeaderPayload
-
-	// latestUTXOSetBucketVersion is the current version of the UTXO set
-	// bucket that is used to track all unspent outputs.
-	latestUTXOSetBucketVersion = 1
-)
-
-var (
-	// blockIndexBucketName is the name of the db bucket used to house to the
-	// block headers and contextual information.
-	blockIndexBucketName = []byte("blockheaderidx")
-
-	// dagStateKeyName is the name of the db key used to store the DAG
-	// tip hashes.
-	dagStateKeyName = []byte("dagstate")
-
-	// utxoSetVersionKeyName is the name of the db key used to store the
-	// version of the utxo set currently in the database.
-	utxoSetVersionKeyName = []byte("utxosetversion")
-
-	// utxoSetBucketName is the name of the db bucket used to house the
-	// unspent transaction output set.
-	utxoSetBucketName = []byte("utxoset")
-
-	// utxoDiffsBucketName is the name of the db bucket used to house the
-	// diffs and diff children of blocks.
-	utxoDiffsBucketName = []byte("utxodiffs")
-
-	// subnetworksBucketName is the name of the db bucket used to store the
-	// subnetwork registry.
-	subnetworksBucketName = []byte("subnetworks")
-
-	// localSubnetworkKeyName is the name of the db key used to store the
-	// node's local subnetwork ID.
-	localSubnetworkKeyName = []byte("localsubnetworkidkey")
-
-	// byteOrder is the preferred byte order used for serializing numeric
-	// fields for storage in the database.
-	byteOrder = binary.LittleEndian
-)
-
-// errNotInDAG signifies that a block hash or height that is not in the
-// DAG was requested.
-type errNotInDAG string
-
-// Error implements the error interface.
-func (e errNotInDAG) Error() string {
-	return string(e)
-}
-
-// isNotInDAGErr returns whether or not the passed error is an
-// errNotInDAG error.
-func isNotInDAGErr(err error) bool {
-	_, ok := err.(errNotInDAG)
-	return ok
-}
-
-// errDeserialize signifies that a problem was encountered when deserializing
-// data.
-type errDeserialize string
-
-// Error implements the error interface.
-func (e errDeserialize) Error() string {
-	return string(e)
-}
-
-// isDeserializeErr returns whether or not the passed error is an errDeserialize
-// error.
-func isDeserializeErr(err error) bool {
-	_, ok := err.(errDeserialize)
-	return ok
-}
-
-// dbPutVersion uses an existing database transaction to update the provided
-// key in the metadata bucket to the given version.  It is primarily used to
-// track versions on entities such as buckets.
-func dbPutVersion(dbTx database.Tx, key []byte, version uint32) error {
-	var serialized [4]byte
-	byteOrder.PutUint32(serialized[:], version)
-	return dbTx.Metadata().Put(key, serialized[:])
-}
-
-// -----------------------------------------------------------------------------
-// The unspent transaction output (UTXO) set consists of an entry for each
-// unspent output using a format that is optimized to reduce space using domain
-// specific compression algorithms.  This format is a slightly modified version
-// of the format used in Bitcoin Core.
-//
-// Each entry is keyed by an outpoint as specified below.  It is important to
-// note that the key encoding uses a VLQ, which employs an MSB encoding so
-// iteration of UTXOs when doing byte-wise comparisons will produce them in
-// order.
-//
-// The serialized key format is:
-//   <hash><output index>
-//
-//   Field                Type             Size
-//   hash                 daghash.Hash   daghash.HashSize
-//   output index         VLQ              variable
-//
-// The serialized value format is:
-//
-//   <header code><compressed txout>
-//
-//   Field                Type     Size
-//   header code          VLQ      variable
-//   compressed txout
-//     compressed amount  VLQ      variable
-//     compressed script  []byte   variable
-//
-// The serialized header code format is:
-//   bit 0 - containing transaction is a coinbase
-//   bits 1-x - height of the block that contains the unspent txout
-//
-// Example 1:
-// From tx in main blockchain:
-// Blk 1, b7c3332bc138e2c9429818f5fed500bcc1746544218772389054dc8047d7cd3f:0
-//
-//    03320496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52
-//    <><------------------------------------------------------------------>
-//     |                                          |
-//   header code                         compressed txout
-//
-//  - header code: 0x03 (coinbase, height 1)
-//  - compressed txout:
-//    - 0x32: VLQ-encoded compressed amount for 5000000000 (50 BTC)
-//    - 0x04: special script type pay-to-pubkey
-//    - 0x96...52: x-coordinate of the pubkey
-//
-// Example 2:
-// From tx in main blockchain:
-// Blk 113931, 4a16969aa4764dd7507fc1de7f0baa4850a246de90c45e59a3207f9a26b5036f:2
-//
-//    8cf316800900b8025be1b3efc63b0ad48e7f9f10e87544528d58
-//    <----><------------------------------------------>
-//      |                             |
-//   header code             compressed txout
-//
-//  - header code: 0x8cf316 (not coinbase, height 113931)
-//  - compressed txout:
-//    - 0x8009: VLQ-encoded compressed amount for 15000000 (0.15 BTC)
-//    - 0x00: special script type pay-to-pubkey-hash
-//    - 0xb8...58: pubkey hash
-//
-// Example 3:
-// From tx in main blockchain:
-// Blk 338156, 1b02d1c8cfef60a189017b9a420c682cf4a0028175f2f563209e4ff61c8c3620:22
-//
-//    a8a2588ba5b9e763011dd46a006572d820e448e12d2bbb38640bc718e6
-//    <----><-------------------------------------------------->
-//      |                             |
-//   header code             compressed txout
-//
-//  - header code: 0xa8a258 (not coinbase, height 338156)
-//  - compressed txout:
-//    - 0x8ba5b9e763: VLQ-encoded compressed amount for 366875659 (3.66875659 BTC)
-//    - 0x01: special script type pay-to-script-hash
-//    - 0x1d...e6: script hash
-// -----------------------------------------------------------------------------
-
-// maxUint32VLQSerializeSize is the maximum number of bytes a max uint32 takes
-// to serialize as a VLQ.
-var maxUint32VLQSerializeSize = serializeSizeVLQ(1<<32 - 1)
-
-// outpointKeyPool defines a concurrent safe free list of byte slices used to
-// provide temporary buffers for outpoint database keys.
-var outpointKeyPool = sync.Pool{
-	New: func() interface{} {
-		b := make([]byte, daghash.HashSize+maxUint32VLQSerializeSize)
-		return &b // Pointer to slice to avoid boxing alloc.
-	},
-}
-
-// outpointKey returns a key suitable for use as a database key in the UTXO set
-// while making use of a free list.  A new buffer is allocated if there are not
-// already any available on the free list.  The returned byte slice should be
-// returned to the free list by using the recycleOutpointKey function when the
-// caller is done with it _unless_ the slice will need to live for longer than
-// the caller can calculate such as when used to write to the database.
-func outpointKey(outpoint wire.Outpoint) *[]byte {
-	// A VLQ employs an MSB encoding, so they are useful not only to reduce
-	// the amount of storage space, but also so iteration of UTXOs when
-	// doing byte-wise comparisons will produce them in order.
-	key := outpointKeyPool.Get().(*[]byte)
-	idx := uint64(outpoint.Index)
-	*key = (*key)[:daghash.HashSize+serializeSizeVLQ(idx)]
-	copy(*key, outpoint.TxID[:])
-	putVLQ((*key)[daghash.HashSize:], idx)
-	return key
-}
-
-// recycleOutpointKey puts the provided byte slice, which should have been
-// obtained via the outpointKey function, back on the free list.
-func recycleOutpointKey(key *[]byte) {
-	outpointKeyPool.Put(key)
-}
-
-// dbPutUTXODiff uses an existing database transaction to update the UTXO set
-// in the database based on the provided UTXO view contents and state.  In
-// particular, only the entries that have been marked as modified are written
-// to the database.
-func dbPutUTXODiff(dbTx database.Tx, diff *UTXODiff) error {
-	utxoBucket := dbTx.Metadata().Bucket(utxoSetBucketName)
-	for outpoint := range diff.toRemove {
-		key := outpointKey(outpoint)
-		err := utxoBucket.Delete(*key)
-		recycleOutpointKey(key)
-		if err != nil {
-			return err
-		}
-	}
-
-	for outpoint, entry := range diff.toAdd {
-		// Serialize and store the UTXO entry.
-		serialized := serializeUTXOEntry(entry)
-
-		key := outpointKey(outpoint)
-		err := utxoBucket.Put(*key, serialized)
-		// NOTE: The key is intentionally not recycled here since the
-		// database interface contract prohibits modifications.  It will
-		// be garbage collected normally when the database is done with
-		// it.
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-type dagState struct {
-	TipHashes         []*daghash.Hash
-	LastFinalityPoint *daghash.Hash
-}
-
-// serializeDAGState returns the serialization of the DAG state.
-// This is data to be stored in the DAG state bucket.
-func serializeDAGState(state *dagState) ([]byte, error) {
-	return json.Marshal(state)
-}
-
-// deserializeDAGState deserializes the passed serialized DAG state.
-// This is data stored in the DAG state bucket and is updated after
-// every block is connected to the DAG.
-func deserializeDAGState(serializedData []byte) (*dagState, error) {
-	var state *dagState
-	err := json.Unmarshal(serializedData, &state)
-	if err != nil {
-		return nil, database.Error{
-			ErrorCode:   database.ErrCorruption,
-			Description: "corrupt DAG state",
-		}
-	}
-
-	return state, nil
-}
-
-// dbPutDAGState uses an existing database transaction to store the latest
-// tip hashes of the DAG.
-func dbPutDAGState(dbTx database.Tx, state *dagState) error {
-	serializedData, err := serializeDAGState(state)
-
-	if err != nil {
-		return err
-	}
-
-	return dbTx.Metadata().Put(dagStateKeyName, serializedData)
-}
-
-// createDAGState initializes both the database and the DAG state to the
-// genesis block.  This includes creating the necessary buckets, so it
-// must only be called on an uninitialized database.
-func (dag *BlockDAG) createDAGState() error {
-	// Create the initial the database DAG state including creating the
-	// necessary index buckets and inserting the genesis block.
-	err := dag.db.Update(func(dbTx database.Tx) error {
-		meta := dbTx.Metadata()
-
-		// Create the bucket that houses the block index data.
-		_, err := meta.CreateBucket(blockIndexBucketName)
-		if err != nil {
-			return err
-		}
-
-		// Create the buckets that house the utxo set, the utxo diffs, and their
-		// version.
-		_, err = meta.CreateBucket(utxoSetBucketName)
-		if err != nil {
-			return err
-		}
-
-		_, err = meta.CreateBucket(utxoDiffsBucketName)
-		if err != nil {
-			return err
-		}
-
-		err = dbPutVersion(dbTx, utxoSetVersionKeyName,
-			latestUTXOSetBucketVersion)
-		if err != nil {
-			return err
-		}
-
-		// Create the bucket that houses the registered subnetworks.
-		_, err = meta.CreateBucket(subnetworksBucketName)
-		if err != nil {
-			return err
-		}
-
-		if err := dbPutLocalSubnetworkID(dbTx, dag.subnetworkID); err != nil {
-			return err
-		}
-
-		if _, err := meta.CreateBucketIfNotExists(idByHashIndexBucketName); err != nil {
-			return err
-		}
-		if _, err := meta.CreateBucketIfNotExists(hashByIDIndexBucketName); err != nil {
-			return err
-		}
-		return nil
-	})
-
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-func (dag *BlockDAG) removeDAGState() error {
-	err := dag.db.Update(func(dbTx database.Tx) error {
-		meta := dbTx.Metadata()
-
-		err := meta.DeleteBucket(blockIndexBucketName)
-		if err != nil {
-			return err
-		}
-
-		err = meta.DeleteBucket(utxoSetBucketName)
-		if err != nil {
-			return err
-		}
-
-		err = meta.DeleteBucket(utxoDiffsBucketName)
-		if err != nil {
-			return err
-		}
-
-		err = dbTx.Metadata().Delete(utxoSetVersionKeyName)
-		if err != nil {
-			return err
-		}
-
-		err = meta.DeleteBucket(subnetworksBucketName)
-		if err != nil {
-			return err
-		}
-
-		err = dbTx.Metadata().Delete(localSubnetworkKeyName)
-		if err != nil {
-			return err
-		}
-
-		return nil
-	})
-
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-func dbPutLocalSubnetworkID(dbTx database.Tx, subnetworkID *subnetworkid.SubnetworkID) error {
-	if subnetworkID == nil {
-		return dbTx.Metadata().Put(localSubnetworkKeyName, []byte{})
-	}
-	return dbTx.Metadata().Put(localSubnetworkKeyName, subnetworkID[:])
-}
-
-// initDAGState attempts to load and initialize the DAG state from the
-// database.  When the db does not yet contain any DAG state, both it and the
-// DAG state are initialized to the genesis block.
-func (dag *BlockDAG) initDAGState() error {
-	// Determine the state of the DAG database. We may need to initialize
-	// everything from scratch or upgrade certain buckets.
-	var initialized bool
-	err := dag.db.View(func(dbTx database.Tx) error {
-		initialized = dbTx.Metadata().Get(dagStateKeyName) != nil
-		if initialized {
-			var localSubnetworkID *subnetworkid.SubnetworkID
-			localSubnetworkIDBytes := dbTx.Metadata().Get(localSubnetworkKeyName)
-			if len(localSubnetworkIDBytes) != 0 {
-				localSubnetworkID = &subnetworkid.SubnetworkID{}
-				localSubnetworkID.SetBytes(localSubnetworkIDBytes)
-			}
-			if !localSubnetworkID.IsEqual(dag.subnetworkID) {
-				return fmt.Errorf("Cannot start btcd with subnetwork ID %s because"+
-					" its database is already built with subnetwork ID %s. If you"+
-					" want to switch to a new database, please reset the"+
-					" database by starting btcd with --reset-db flag", dag.subnetworkID, localSubnetworkID)
-			}
-		}
-		return nil
-	})
-	if err != nil {
-		return err
-	}
-
-	if !initialized {
-		// At this point the database has not already been initialized, so
-		// initialize both it and the chain state to the genesis block.
-		return dag.createDAGState()
-	}
-
-	// Attempt to load the DAG state from the database.
-	return dag.db.View(func(dbTx database.Tx) error {
-		// Fetch the stored DAG tipHashes from the database metadata.
-		// When it doesn't exist, it means the database hasn't been
-		// initialized for use with the DAG yet, so break out now to allow
-		// that to happen under a writable database transaction.
-		serializedData := dbTx.Metadata().Get(dagStateKeyName)
-		log.Tracef("Serialized DAG tip hashes: %x", serializedData)
-		state, err := deserializeDAGState(serializedData)
-		if err != nil {
-			return err
-		}
-
-		// Load all of the headers from the data for the known DAG
-		// and construct the block index accordingly.  Since the
-		// number of nodes are already known, perform a single alloc
-		// for them versus a whole bunch of little ones to reduce
-		// pressure on the GC.
-		log.Infof("Loading block index...")
-
-		blockIndexBucket := dbTx.Metadata().Bucket(blockIndexBucketName)
-
-		var i int32
-		var lastNode *blockNode
-		var unprocessedBlockNodes []*blockNode
-		cursor := blockIndexBucket.Cursor()
-		for ok := cursor.First(); ok; ok = cursor.Next() {
-			node, err := dag.deserializeBlockNode(cursor.Value())
-			if err != nil {
-				return err
-			}
-
-			// Check to see if this node had been stored in the the block DB
-			// but not yet accepted. If so, add it to a slice to be processed later.
-			if node.status == statusDataStored {
-				unprocessedBlockNodes = append(unprocessedBlockNodes, node)
-				continue
-			}
-
-			if lastNode == nil {
-				if !node.hash.IsEqual(dag.dagParams.GenesisHash) {
-					return AssertError(fmt.Sprintf("initDAGState: Expected "+
-						"first entry in block index to be genesis block, "+
-						"found %s", node.hash))
-				}
-			} else {
-				if len(node.parents) == 0 {
-					return AssertError(fmt.Sprintf("initDAGState: Could "+
-						"not find any parent for block %s", node.hash))
-				}
-			}
-
-			// Add the node to its parents children, connect it,
-			// and add it to the block index.
-			node.updateParentsChildren()
-			dag.index.addNode(node)
-
-			if node.status.KnownValid() {
-				dag.blockCount++
-			}
-
-			lastNode = node
-			i++
-		}
-
-		// Load all of the known UTXO entries and construct the full
-		// UTXO set accordingly.  Since the number of entries is already
-		// known, perform a single alloc for them versus a whole bunch
-		// of little ones to reduce pressure on the GC.
-		log.Infof("Loading UTXO set...")
-
-		utxoEntryBucket := dbTx.Metadata().Bucket(utxoSetBucketName)
-
-		// Determine how many UTXO entries will be loaded into the index so we can
-		// allocate the right amount.
-		var utxoEntryCount int32
-		cursor = utxoEntryBucket.Cursor()
-		for ok := cursor.First(); ok; ok = cursor.Next() {
-			utxoEntryCount++
-		}
-
-		fullUTXOCollection := make(utxoCollection, utxoEntryCount)
-		for ok := cursor.First(); ok; ok = cursor.Next() {
-			// Deserialize the outpoint
-			outpoint, err := deserializeOutpoint(cursor.Key())
-			if err != nil {
-				// Ensure any deserialization errors are returned as database
-				// corruption errors.
-				if isDeserializeErr(err) {
-					return database.Error{
-						ErrorCode:   database.ErrCorruption,
-						Description: fmt.Sprintf("corrupt outpoint: %s", err),
-					}
-				}
-
-				return err
-			}
-
-			// Deserialize the utxo entry
-			entry, err := deserializeUTXOEntry(cursor.Value())
-			if err != nil {
-				// Ensure any deserialization errors are returned as database
-				// corruption errors.
-				if isDeserializeErr(err) {
-					return database.Error{
-						ErrorCode:   database.ErrCorruption,
-						Description: fmt.Sprintf("corrupt utxo entry: %s", err),
-					}
-				}
-
-				return err
-			}
-
-			fullUTXOCollection[*outpoint] = entry
-		}
-
-		// Apply the loaded utxoCollection to the virtual block.
-		dag.virtual.utxoSet, err = newFullUTXOSetFromUTXOCollection(fullUTXOCollection)
-		if err != nil {
-			return AssertError(fmt.Sprintf("Error loading UTXOSet: %s", err))
-		}
-
-		// Apply the stored tips to the virtual block.
-		tips := newSet()
-		for _, tipHash := range state.TipHashes {
-			tip := dag.index.LookupNode(tipHash)
-			if tip == nil {
-				return AssertError(fmt.Sprintf("initDAGState: cannot find "+
-					"DAG tip %s in block index", state.TipHashes))
-			}
-			tips.add(tip)
-		}
-		dag.virtual.SetTips(tips)
-
-		// Set the last finality point
-		dag.lastFinalityPoint = dag.index.LookupNode(state.LastFinalityPoint)
-		dag.finalizeNodesBelowFinalityPoint(false)
-
-		// Go over any unprocessed blockNodes and process them now.
-		for _, node := range unprocessedBlockNodes {
-			// Check to see if the block exists in the block DB. If it
-			// doesn't, the database has certainly been corrupted.
-			blockExists, err := dbTx.HasBlock(node.hash)
-			if err != nil {
-				return AssertError(fmt.Sprintf("initDAGState: HasBlock "+
-					"for block %s failed: %s", node.hash, err))
-			}
-			if !blockExists {
-				return AssertError(fmt.Sprintf("initDAGState: block %s "+
-					"exists in block index but not in block db", node.hash))
-			}
-
-			// Attempt to accept the block.
-			block, err := dbFetchBlockByNode(dbTx, node)
-			isOrphan, delay, err := dag.ProcessBlock(block, BFWasStored)
-			if err != nil {
-				log.Warnf("Block %s, which was not previously processed, "+
-					"failed to be accepted to the DAG: %s", node.hash, err)
-				continue
-			}
-
-			// If the block is an orphan or is delayed then it couldn't have
-			// possibly been written to the block index in the first place.
-			if isOrphan {
-				return AssertError(fmt.Sprintf("Block %s, which was not "+
-					"previously processed, turned out to be an orphan, which is "+
-					"impossible.", node.hash))
-			}
-			if delay != 0 {
-				return AssertError(fmt.Sprintf("Block %s, which was not "+
-					"previously processed, turned out to be delayed, which is "+
-					"impossible.", node.hash))
-			}
-		}
-
-		return nil
-	})
-}
-
-// deserializeBlockNode parses a value in the block index bucket and returns a block node.
-func (dag *BlockDAG) deserializeBlockNode(blockRow []byte) (*blockNode, error) {
-	buffer := bytes.NewReader(blockRow)
-
-	var header wire.BlockHeader
-	err := header.Deserialize(buffer)
-	if err != nil {
-		return nil, err
-	}
-
-	node := &blockNode{
-		hash:                 header.BlockHash(),
-		version:              header.Version,
-		bits:                 header.Bits,
-		nonce:                header.Nonce,
-		timestamp:            header.Timestamp.Unix(),
-		hashMerkleRoot:       header.HashMerkleRoot,
-		acceptedIDMerkleRoot: header.AcceptedIDMerkleRoot,
-		utxoCommitment:       header.UTXOCommitment,
-	}
-
-	node.children = newSet()
-	node.parents = newSet()
-
-	for _, hash := range header.ParentHashes {
-		parent := dag.index.LookupNode(hash)
-		if parent == nil {
-			return nil, AssertError(fmt.Sprintf("deserializeBlockNode: Could "+
-				"not find parent %s for block %s", hash, header.BlockHash()))
-		}
-		node.parents.add(parent)
-	}
-
-	statusByte, err := buffer.ReadByte()
-	if err != nil {
-		return nil, err
-	}
-	node.status = blockStatus(statusByte)
-
-	selectedParentHash := &daghash.Hash{}
-	if _, err := io.ReadFull(buffer, selectedParentHash[:]); err != nil {
-		return nil, err
-	}
-
-	// Because genesis doesn't have selected parent, it's serialized as zero hash
-	if !selectedParentHash.IsEqual(&daghash.ZeroHash) {
-		node.selectedParent = dag.index.LookupNode(selectedParentHash)
-	}
-
-	node.blueScore, err = binaryserializer.Uint64(buffer, byteOrder)
-	if err != nil {
-		return nil, err
-	}
-
-	bluesCount, err := wire.ReadVarInt(buffer)
-	if err != nil {
-		return nil, err
-	}
-
-	node.blues = make([]*blockNode, bluesCount)
-	for i := uint64(0); i < bluesCount; i++ {
-		hash := &daghash.Hash{}
-		if _, err := io.ReadFull(buffer, hash[:]); err != nil {
-			return nil, err
-		}
-		node.blues[i] = dag.index.LookupNode(hash)
-	}
-
-	node.height = calculateNodeHeight(node)
-	node.chainHeight = calculateChainHeight(node)
-
-	return node, nil
-}
-
-// dbFetchBlockByNode uses an existing database transaction to retrieve the
-// raw block for the provided node, deserialize it, and return a util.Block
-// of it.
-func dbFetchBlockByNode(dbTx database.Tx, node *blockNode) (*util.Block, error) {
-	// Load the raw block bytes from the database.
-	blockBytes, err := dbTx.FetchBlock(node.hash)
-	if err != nil {
-		return nil, err
-	}
-
-	// Create the encapsulated block.
-	block, err := util.NewBlockFromBytes(blockBytes)
-	if err != nil {
-		return nil, err
-	}
-	return block, nil
-}
-
-// dbStoreBlockNode stores the block node data into the block
-// index bucket. This overwrites the current entry if there exists one.
-func dbStoreBlockNode(dbTx database.Tx, node *blockNode) error {
-	// Serialize block data to be stored.
-	w := bytes.NewBuffer(make([]byte, 0, blockHdrSize+1))
-	header := node.Header()
-	err := header.Serialize(w)
-	if err != nil {
-		return err
-	}
-
-	err = w.WriteByte(byte(node.status))
-	if err != nil {
-		return err
-	}
-
-	// Because genesis doesn't have selected parent, it's serialized as zero hash
-	selectedParentHash := &daghash.ZeroHash
-	if node.selectedParent != nil {
-		selectedParentHash = node.selectedParent.hash
-	}
-	_, err = w.Write(selectedParentHash[:])
-	if err != nil {
-		return err
-	}
-
-	err = binaryserializer.PutUint64(w, byteOrder, node.blueScore)
-	if err != nil {
-		return err
-	}
-
-	err = wire.WriteVarInt(w, uint64(len(node.blues)))
-	if err != nil {
-		return err
-	}
-
-	for _, blue := range node.blues {
-		_, err = w.Write(blue.hash[:])
-		if err != nil {
-			return err
-		}
-	}
-
-	value := w.Bytes()
-
-	// Write block header data to block index bucket.
-	blockIndexBucket := dbTx.Metadata().Bucket(blockIndexBucketName)
-	key := BlockIndexKey(node.hash, node.blueScore)
-	return blockIndexBucket.Put(key, value)
-}
-
-// dbStoreBlock stores the provided block in the database if it is not already
-// there. The full block data is written to ffldb.
-func dbStoreBlock(dbTx database.Tx, block *util.Block) error {
-	hasBlock, err := dbTx.HasBlock(block.Hash())
-	if err != nil {
-		return err
-	}
-	if hasBlock {
-		return nil
-	}
-	return dbTx.StoreBlock(block)
-}
-
-// BlockIndexKey generates the binary key for an entry in the block index
-// bucket. The key is composed of the block blue score encoded as a big-endian
-// 64-bit unsigned int followed by the 32 byte block hash.
-// The blue score component is important for iteration order.
-func BlockIndexKey(blockHash *daghash.Hash, blueScore uint64) []byte {
-	indexKey := make([]byte, daghash.HashSize+8)
-	binary.BigEndian.PutUint64(indexKey[0:8], blueScore)
-	copy(indexKey[8:daghash.HashSize+8], blockHash[:])
-	return indexKey
-}
-
-func blockHashFromBlockIndexKey(BlockIndexKey []byte) (*daghash.Hash, error) {
-	return daghash.NewHash(BlockIndexKey[8 : daghash.HashSize+8])
-}
-
-// BlockByHash returns the block from the DAG with the given hash.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) BlockByHash(hash *daghash.Hash) (*util.Block, error) {
-	// Lookup the block hash in block index and ensure it is in the DAG
-	node := dag.index.LookupNode(hash)
-	if node == nil {
-		str := fmt.Sprintf("block %s is not in the main chain", hash)
-		return nil, errNotInDAG(str)
-	}
-
-	// Load the block from the database and return it.
-	var block *util.Block
-	err := dag.db.View(func(dbTx database.Tx) error {
-		var err error
-		block, err = dbFetchBlockByNode(dbTx, node)
-		return err
-	})
-	return block, err
-}
-
-// BlockHashesFrom returns a slice of blocks starting from startHash
-// ordered by blueScore. If startHash is nil then the genesis block is used.
-//
-// This method MUST be called with the DAG lock held
-func (dag *BlockDAG) BlockHashesFrom(startHash *daghash.Hash, limit int) ([]*daghash.Hash, error) {
-	blockHashes := make([]*daghash.Hash, 0, limit)
-	if startHash == nil {
-		startHash = dag.genesis.hash
-
-		// If we're starting from the beginning we should include the
-		// genesis hash in the result
-		blockHashes = append(blockHashes, dag.genesis.hash)
-	}
-	if !dag.BlockExists(startHash) {
-		return nil, fmt.Errorf("block %s not found", startHash)
-	}
-	blueScore, err := dag.BlueScoreByBlockHash(startHash)
-	if err != nil {
-		return nil, err
-	}
-
-	err = dag.index.db.View(func(dbTx database.Tx) error {
-		blockIndexBucket := dbTx.Metadata().Bucket(blockIndexBucketName)
-		startKey := BlockIndexKey(startHash, blueScore)
-
-		cursor := blockIndexBucket.Cursor()
-		cursor.Seek(startKey)
-		for ok := cursor.Next(); ok; ok = cursor.Next() {
-			key := cursor.Key()
-			blockHash, err := blockHashFromBlockIndexKey(key)
-			if err != nil {
-				return err
-			}
-			blockHashes = append(blockHashes, blockHash)
-			if len(blockHashes) == limit {
-				break
-			}
-		}
-		return nil
-	})
-	if err != nil {
-		return nil, err
-	}
-	return blockHashes, nil
-}

blockdag/doc.go

@@ -1,81 +0,0 @@
-// Copyright (c) 2013-2014 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-/*
-Package blockdag implements bitcoin block handling and chain selection rules.
-
-The bitcoin block handling and chain selection rules are an integral, and quite
-likely the most important, part of bitcoin.  Unfortunately, at the time of
-this writing, these rules are also largely undocumented and had to be
-ascertained from the bitcoind source code.  At its core, bitcoin is a
-distributed consensus of which blocks are valid and which ones will comprise the
-main block chain (public ledger) that ultimately determines accepted
-transactions, so it is extremely important that fully validating nodes agree on
-all rules.
-
-At a high level, this package provides support for inserting new blocks into
-the block chain according to the aforementioned rules.  It includes
-functionality such as rejecting duplicate blocks, ensuring blocks and
-transactions follow all rules, orphan handling, and best chain selection along
-with reorganization.
-
-Since this package does not deal with other bitcoin specifics such as network
-communication or wallets, it provides a notification system which gives the
-caller a high level of flexibility in how they want to react to certain events
-such as orphan blocks which need their parents requested and newly connected
-main chain blocks which might result in wallet updates.
-
-Bitcoin Chain Processing Overview
-
-Before a block is allowed into the block chain, it must go through an intensive
-series of validation rules.  The following list serves as a general outline of
-those rules to provide some intuition into what is going on under the hood, but
-is by no means exhaustive:
-
- - Reject duplicate blocks
- - Perform a series of sanity checks on the block and its transactions such as
-   verifying proof of work, timestamps, number and character of transactions,
-   transaction amounts, script complexity, and merkle root calculations
- - Compare the block against predetermined checkpoints for expected timestamps
-   and difficulty based on elapsed time since the checkpoint
- - Save the most recent orphan blocks for a limited time in case their parent
-   blocks become available
- - Stop processing if the block is an orphan as the rest of the processing
-   depends on the block's position within the block chain
- - Perform a series of more thorough checks that depend on the block's position
-   within the block chain such as verifying block difficulties adhere to
-   difficulty retarget rules, timestamps are after the median of the last
-   several blocks, all transactions are finalized, checkpoint blocks match, and
-   block versions are in line with the previous blocks
- - Determine how the block fits into the chain and perform different actions
-   accordingly in order to ensure any side chains which have higher difficulty
-   than the main chain become the new main chain
- - When a block is being connected to the main chain (either through
-   reorganization of a side chain to the main chain or just extending the
-   main chain), perform further checks on the block's transactions such as
-   verifying transaction duplicates, script complexity for the combination of
-   connected scripts, coinbase maturity, double spends, and connected
-   transaction values
- - Run the transaction scripts to verify the spender is allowed to spend the
-   coins
- - Insert the block into the block database
-
-Errors
-
-Errors returned by this package are either the raw errors provided by underlying
-calls or of type blockchain.RuleError.  This allows the caller to differentiate
-between unexpected errors, such as database errors, versus errors due to rule
-violations through type assertions.  In addition, callers can programmatically
-determine the specific rule violation by examining the ErrorCode field of the
-type asserted blockchain.RuleError.
-
-Bitcoin Improvement Proposals
-
-This package includes spec changes outlined by the following BIPs:
-
-		BIP0016 (https://en.bitcoin.it/wiki/BIP_0016)
-		BIP0030 (https://en.bitcoin.it/wiki/BIP_0030)
-		BIP0034 (https://en.bitcoin.it/wiki/BIP_0034)
-*/
-package blockdag

blockdag/external_dag_test.go

@@ -1,483 +0,0 @@
-package blockdag_test
-
-import (
-	"fmt"
-	"math"
-	"testing"
-
-	"github.com/daglabs/btcd/util/subnetworkid"
-
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/util/testtools"
-
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/mining"
-	"github.com/daglabs/btcd/txscript"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/wire"
-)
-
-// TestFinality checks that the finality mechanism works as expected.
-// This is how the flow goes:
-// 1) We build a chain of blockdag.FinalityInterval blocks and call its tip altChainTip.
-// 2) We build another chain (let's call it mainChain) of 2 * blockdag.FinalityInterval
-// blocks, which points to genesis, and then we check that the block in that
-// chain with height of blockdag.FinalityInterval is marked as finality point (This is
-// very predictable, because the blue score of each new block in a chain is the
-// parents plus one).
-// 3) We make a new child to block with height (2 * blockdag.FinalityInterval - 1)
-// in mainChain, and we check that connecting it to the DAG
-// doesn't affect the last finality point.
-// 4) We make a block that points to genesis, and check that it
-// gets rejected because its blue score is lower then the last finality
-// point.
-// 5) We make a block that points to altChainTip, and check that it
-// gets rejected because it doesn't have the last finality point in
-// its selected parent chain.
-func TestFinality(t *testing.T) {
-	params := dagconfig.SimNetParams
-	params.K = 1
-	dag, teardownFunc, err := blockdag.DAGSetup("TestFinality", blockdag.Config{
-		DAGParams: &params,
-	})
-	if err != nil {
-		t.Fatalf("Failed to setup DAG instance: %v", err)
-	}
-	defer teardownFunc()
-	buildNodeToDag := func(parentHashes []*daghash.Hash) (*util.Block, error) {
-		msgBlock, err := mining.PrepareBlockForTest(dag, &params, parentHashes, nil, false)
-		if err != nil {
-			return nil, err
-		}
-		block := util.NewBlock(msgBlock)
-
-		isOrphan, delay, err := dag.ProcessBlock(block, blockdag.BFNoPoWCheck)
-		if err != nil {
-			return nil, err
-		}
-		if delay != 0 {
-			return nil, fmt.Errorf("ProcessBlock: block " +
-				"is too far in the future")
-		}
-		if isOrphan {
-			return nil, fmt.Errorf("ProcessBlock: unexpected returned orphan block")
-		}
-
-		return block, nil
-	}
-
-	genesis := util.NewBlock(params.GenesisBlock)
-	currentNode := genesis
-
-	// First we build a chain of blockdag.FinalityInterval blocks for future use
-	for i := 0; i < blockdag.FinalityInterval; i++ {
-		currentNode, err = buildNodeToDag([]*daghash.Hash{currentNode.Hash()})
-		if err != nil {
-			t.Fatalf("TestFinality: buildNodeToDag unexpectedly returned an error: %v", err)
-		}
-	}
-
-	altChainTip := currentNode
-
-	// Now we build a new chain of 2 * blockdag.FinalityInterval blocks, pointed to genesis, and
-	// we expect the block with height 1 * blockdag.FinalityInterval to be the last finality point
-	currentNode = genesis
-	for i := 0; i < blockdag.FinalityInterval; i++ {
-		currentNode, err = buildNodeToDag([]*daghash.Hash{currentNode.Hash()})
-		if err != nil {
-			t.Fatalf("TestFinality: buildNodeToDag unexpectedly returned an error: %v", err)
-		}
-	}
-
-	expectedFinalityPoint := currentNode
-
-	for i := 0; i < blockdag.FinalityInterval; i++ {
-		currentNode, err = buildNodeToDag([]*daghash.Hash{currentNode.Hash()})
-		if err != nil {
-			t.Fatalf("TestFinality: buildNodeToDag unexpectedly returned an error: %v", err)
-		}
-	}
-
-	if !dag.LastFinalityPointHash().IsEqual(expectedFinalityPoint.Hash()) {
-		t.Errorf("TestFinality: dag.lastFinalityPoint expected to be %v but got %v", expectedFinalityPoint, dag.LastFinalityPointHash())
-	}
-
-	// Here we check that even if we create a parallel tip (a new tip with
-	// the same parents as the current one) with the same blue score as the
-	// current tip, it still won't affect the last finality point.
-	_, err = buildNodeToDag(currentNode.MsgBlock().Header.ParentHashes)
-	if err != nil {
-		t.Fatalf("TestFinality: buildNodeToDag unexpectedly returned an error: %v", err)
-	}
-	if !dag.LastFinalityPointHash().IsEqual(expectedFinalityPoint.Hash()) {
-		t.Errorf("TestFinality: dag.lastFinalityPoint was unexpectly changed")
-	}
-
-	// Here we check that a block with lower blue score than the last finality
-	// point will get rejected
-	fakeCoinbaseTx, err := dag.NextBlockCoinbaseTransaction(nil, nil)
-	if err != nil {
-		t.Errorf("NextBlockCoinbaseTransaction: %s", err)
-	}
-	merkleRoot := blockdag.BuildHashMerkleTreeStore([]*util.Tx{fakeCoinbaseTx}).Root()
-	beforeFinalityBlock := wire.NewMsgBlock(&wire.BlockHeader{
-		Version:              0x10000000,
-		ParentHashes:         []*daghash.Hash{genesis.Hash()},
-		HashMerkleRoot:       merkleRoot,
-		AcceptedIDMerkleRoot: &daghash.ZeroHash,
-		UTXOCommitment:       &daghash.ZeroHash,
-		Timestamp:            dag.SelectedTipHeader().Timestamp,
-		Bits:                 genesis.MsgBlock().Header.Bits,
-	})
-	beforeFinalityBlock.AddTransaction(fakeCoinbaseTx.MsgTx())
-	_, _, err = dag.ProcessBlock(util.NewBlock(beforeFinalityBlock), blockdag.BFNoPoWCheck)
-	if err == nil {
-		t.Errorf("TestFinality: buildNodeToDag expected an error but got <nil>")
-	}
-	rErr, ok := err.(blockdag.RuleError)
-	if ok {
-		if rErr.ErrorCode != blockdag.ErrFinality {
-			t.Errorf("TestFinality: buildNodeToDag expected an error with code %v but instead got %v", blockdag.ErrFinality, rErr.ErrorCode)
-		}
-	} else {
-		t.Errorf("TestFinality: buildNodeToDag got unexpected error: %v", err)
-	}
-
-	// Here we check that a block that doesn't have the last finality point in
-	// its selected parent chain will get rejected
-	_, err = buildNodeToDag([]*daghash.Hash{altChainTip.Hash()})
-	if err == nil {
-		t.Errorf("TestFinality: buildNodeToDag expected an error but got <nil>")
-	}
-	rErr, ok = err.(blockdag.RuleError)
-	if ok {
-		if rErr.ErrorCode != blockdag.ErrFinality {
-			t.Errorf("TestFinality: buildNodeToDag expected an error with code %v but instead got %v", blockdag.ErrFinality, rErr.ErrorCode)
-		}
-	} else {
-		t.Errorf("TestFinality: buildNodeToDag got unexpected error: %v", rErr)
-	}
-}
-
-// TestFinalityInterval tests that the finality interval is
-// smaller then wire.MaxInvPerMsg, so when a peer receives
-// a getblocks message it should always be able to send
-// all the necessary invs.
-func TestFinalityInterval(t *testing.T) {
-	if blockdag.FinalityInterval > wire.MaxInvPerMsg {
-		t.Errorf("blockdag.FinalityInterval should be lower or equal to wire.MaxInvPerMsg")
-	}
-}
-
-// TestSubnetworkRegistry tests the full subnetwork registry flow
-func TestSubnetworkRegistry(t *testing.T) {
-	params := dagconfig.SimNetParams
-	params.K = 1
-	params.BlockCoinbaseMaturity = 0
-	dag, teardownFunc, err := blockdag.DAGSetup("TestSubnetworkRegistry", blockdag.Config{
-		DAGParams: &params,
-	})
-	if err != nil {
-		t.Fatalf("Failed to setup DAG instance: %v", err)
-	}
-	defer teardownFunc()
-
-	gasLimit := uint64(12345)
-	subnetworkID, err := testtools.RegisterSubnetworkForTest(dag, &params, gasLimit)
-	if err != nil {
-		t.Fatalf("could not register network: %s", err)
-	}
-	limit, err := dag.SubnetworkStore.GasLimit(subnetworkID)
-	if err != nil {
-		t.Fatalf("could not retrieve gas limit: %s", err)
-	}
-	if limit != gasLimit {
-		t.Fatalf("unexpected gas limit. want: %d, got: %d", gasLimit, limit)
-	}
-}
-
-func TestChainedTransactions(t *testing.T) {
-	params := dagconfig.SimNetParams
-	params.BlockCoinbaseMaturity = 0
-	// Create a new database and dag instance to run tests against.
-	dag, teardownFunc, err := blockdag.DAGSetup("TestChainedTransactions", blockdag.Config{
-		DAGParams: &params,
-	})
-	if err != nil {
-		t.Fatalf("Failed to setup dag instance: %v", err)
-	}
-	defer teardownFunc()
-
-	block1, err := mining.PrepareBlockForTest(dag, &params, []*daghash.Hash{params.GenesisHash}, nil, false)
-	if err != nil {
-		t.Fatalf("PrepareBlockForTest: %v", err)
-	}
-	isOrphan, delay, err := dag.ProcessBlock(util.NewBlock(block1), blockdag.BFNoPoWCheck)
-	if err != nil {
-		t.Fatalf("ProcessBlock: %v", err)
-	}
-	if delay != 0 {
-		t.Fatalf("ProcessBlock: block1 " +
-			"is too far in the future")
-	}
-	if isOrphan {
-		t.Fatalf("ProcessBlock: block1 got unexpectedly orphaned")
-	}
-	cbTx := block1.Transactions[0]
-
-	signatureScript, err := txscript.PayToScriptHashSignatureScript(blockdag.OpTrueScript, nil)
-	if err != nil {
-		t.Fatalf("Failed to build signature script: %s", err)
-	}
-	txIn := &wire.TxIn{
-		PreviousOutpoint: wire.Outpoint{TxID: *cbTx.TxID(), Index: 0},
-		SignatureScript:  signatureScript,
-		Sequence:         wire.MaxTxInSequenceNum,
-	}
-	txOut := &wire.TxOut{
-		ScriptPubKey: blockdag.OpTrueScript,
-		Value:        uint64(1),
-	}
-	tx := wire.NewNativeMsgTx(wire.TxVersion, []*wire.TxIn{txIn}, []*wire.TxOut{txOut})
-
-	chainedTxIn := &wire.TxIn{
-		PreviousOutpoint: wire.Outpoint{TxID: *tx.TxID(), Index: 0},
-		SignatureScript:  signatureScript,
-		Sequence:         wire.MaxTxInSequenceNum,
-	}
-
-	scriptPubKey, err := txscript.PayToScriptHashScript(blockdag.OpTrueScript)
-	if err != nil {
-		t.Fatalf("Failed to build public key script: %s", err)
-	}
-	chainedTxOut := &wire.TxOut{
-		ScriptPubKey: scriptPubKey,
-		Value:        uint64(1),
-	}
-	chainedTx := wire.NewNativeMsgTx(wire.TxVersion, []*wire.TxIn{chainedTxIn}, []*wire.TxOut{chainedTxOut})
-
-	block2, err := mining.PrepareBlockForTest(dag, &params, []*daghash.Hash{block1.BlockHash()}, []*wire.MsgTx{tx, chainedTx}, true)
-	if err != nil {
-		t.Fatalf("PrepareBlockForTest: %v", err)
-	}
-
-	//Checks that dag.ProcessBlock fails because we don't allow a transaction to spend another transaction from the same block
-	isOrphan, delay, err = dag.ProcessBlock(util.NewBlock(block2), blockdag.BFNoPoWCheck)
-	if err == nil {
-		t.Errorf("ProcessBlock expected an error")
-	} else if rErr, ok := err.(blockdag.RuleError); ok {
-		if rErr.ErrorCode != blockdag.ErrMissingTxOut {
-			t.Errorf("ProcessBlock expected an %v error code but got %v", blockdag.ErrMissingTxOut, rErr.ErrorCode)
-		}
-	} else {
-		t.Errorf("ProcessBlock expected a blockdag.RuleError but got %v", err)
-	}
-	if delay != 0 {
-		t.Fatalf("ProcessBlock: block2 " +
-			"is too far in the future")
-	}
-	if isOrphan {
-		t.Errorf("ProcessBlock: block2 got unexpectedly orphaned")
-	}
-
-	nonChainedTxIn := &wire.TxIn{
-		PreviousOutpoint: wire.Outpoint{TxID: *cbTx.TxID(), Index: 0},
-		SignatureScript:  signatureScript,
-		Sequence:         wire.MaxTxInSequenceNum,
-	}
-	nonChainedTxOut := &wire.TxOut{
-		ScriptPubKey: scriptPubKey,
-		Value:        uint64(1),
-	}
-	nonChainedTx := wire.NewNativeMsgTx(wire.TxVersion, []*wire.TxIn{nonChainedTxIn}, []*wire.TxOut{nonChainedTxOut})
-
-	block3, err := mining.PrepareBlockForTest(dag, &params, []*daghash.Hash{block1.BlockHash()}, []*wire.MsgTx{nonChainedTx}, false)
-	if err != nil {
-		t.Fatalf("PrepareBlockForTest: %v", err)
-	}
-
-	//Checks that dag.ProcessBlock doesn't fail because all of its transaction are dependant on transactions from previous blocks
-	isOrphan, delay, err = dag.ProcessBlock(util.NewBlock(block3), blockdag.BFNoPoWCheck)
-	if err != nil {
-		t.Errorf("ProcessBlock: %v", err)
-	}
-	if delay != 0 {
-		t.Fatalf("ProcessBlock: block3 " +
-			"is too far in the future")
-	}
-	if isOrphan {
-		t.Errorf("ProcessBlock: block3 got unexpectedly orphaned")
-	}
-}
-
-// TestGasLimit tests the gas limit rules
-func TestGasLimit(t *testing.T) {
-	params := dagconfig.SimNetParams
-	params.K = 1
-	params.BlockCoinbaseMaturity = 0
-	dag, teardownFunc, err := blockdag.DAGSetup("TestSubnetworkRegistry", blockdag.Config{
-		DAGParams: &params,
-	})
-	if err != nil {
-		t.Fatalf("Failed to setup DAG instance: %v", err)
-	}
-	defer teardownFunc()
-
-	// First we prepare a subnetwork and a block with coinbase outputs to fund our tests
-	gasLimit := uint64(12345)
-	subnetworkID, err := testtools.RegisterSubnetworkForTest(dag, &params, gasLimit)
-	if err != nil {
-		t.Fatalf("could not register network: %s", err)
-	}
-
-	cbTxs := []*wire.MsgTx{}
-	for i := 0; i < 4; i++ {
-		fundsBlock, err := mining.PrepareBlockForTest(dag, &params, dag.TipHashes(), nil, false)
-		if err != nil {
-			t.Fatalf("PrepareBlockForTest: %v", err)
-		}
-		isOrphan, delay, err := dag.ProcessBlock(util.NewBlock(fundsBlock), blockdag.BFNoPoWCheck)
-		if err != nil {
-			t.Fatalf("ProcessBlock: %v", err)
-		}
-		if delay != 0 {
-			t.Fatalf("ProcessBlock: the funds block " +
-				"is too far in the future")
-		}
-		if isOrphan {
-			t.Fatalf("ProcessBlock: fundsBlock got unexpectedly orphan")
-		}
-
-		cbTxs = append(cbTxs, fundsBlock.Transactions[util.CoinbaseTransactionIndex])
-	}
-
-	signatureScript, err := txscript.PayToScriptHashSignatureScript(blockdag.OpTrueScript, nil)
-	if err != nil {
-		t.Fatalf("Failed to build signature script: %s", err)
-	}
-
-	scriptPubKey, err := txscript.PayToScriptHashScript(blockdag.OpTrueScript)
-	if err != nil {
-		t.Fatalf("Failed to build public key script: %s", err)
-	}
-
-	tx1In := &wire.TxIn{
-		PreviousOutpoint: *wire.NewOutpoint(cbTxs[0].TxID(), 0),
-		Sequence:         wire.MaxTxInSequenceNum,
-		SignatureScript:  signatureScript,
-	}
-	tx1Out := &wire.TxOut{
-		Value:        cbTxs[0].TxOut[0].Value,
-		ScriptPubKey: scriptPubKey,
-	}
-	tx1 := wire.NewSubnetworkMsgTx(wire.TxVersion, []*wire.TxIn{tx1In}, []*wire.TxOut{tx1Out}, subnetworkID, 10000, []byte{})
-
-	tx2In := &wire.TxIn{
-		PreviousOutpoint: *wire.NewOutpoint(cbTxs[1].TxID(), 0),
-		Sequence:         wire.MaxTxInSequenceNum,
-		SignatureScript:  signatureScript,
-	}
-	tx2Out := &wire.TxOut{
-		Value:        cbTxs[1].TxOut[0].Value,
-		ScriptPubKey: scriptPubKey,
-	}
-	tx2 := wire.NewSubnetworkMsgTx(wire.TxVersion, []*wire.TxIn{tx2In}, []*wire.TxOut{tx2Out}, subnetworkID, 10000, []byte{})
-
-	// Here we check that we can't process a block that has transactions that exceed the gas limit
-	overLimitBlock, err := mining.PrepareBlockForTest(dag, &params, dag.TipHashes(), []*wire.MsgTx{tx1, tx2}, true)
-	if err != nil {
-		t.Fatalf("PrepareBlockForTest: %v", err)
-	}
-	isOrphan, delay, err := dag.ProcessBlock(util.NewBlock(overLimitBlock), blockdag.BFNoPoWCheck)
-	if err == nil {
-		t.Fatalf("ProcessBlock expected to have an error in block that exceeds gas limit")
-	}
-	rErr, ok := err.(blockdag.RuleError)
-	if !ok {
-		t.Fatalf("ProcessBlock expected a RuleError, but got %v", err)
-	} else if rErr.ErrorCode != blockdag.ErrInvalidGas {
-		t.Fatalf("ProcessBlock expected error code %s but got %s", blockdag.ErrInvalidGas, rErr.ErrorCode)
-	}
-	if delay != 0 {
-		t.Fatalf("ProcessBlock: overLimitBlock " +
-			"is too far in the future")
-	}
-	if isOrphan {
-		t.Fatalf("ProcessBlock: overLimitBlock got unexpectedly orphan")
-	}
-
-	overflowGasTxIn := &wire.TxIn{
-		PreviousOutpoint: *wire.NewOutpoint(cbTxs[2].TxID(), 0),
-		Sequence:         wire.MaxTxInSequenceNum,
-		SignatureScript:  signatureScript,
-	}
-	overflowGasTxOut := &wire.TxOut{
-		Value:        cbTxs[2].TxOut[0].Value,
-		ScriptPubKey: scriptPubKey,
-	}
-	overflowGasTx := wire.NewSubnetworkMsgTx(wire.TxVersion, []*wire.TxIn{overflowGasTxIn}, []*wire.TxOut{overflowGasTxOut},
-		subnetworkID, math.MaxUint64, []byte{})
-
-	// Here we check that we can't process a block that its transactions' gas overflows uint64
-	overflowGasBlock, err := mining.PrepareBlockForTest(dag, &params, dag.TipHashes(), []*wire.MsgTx{tx1, overflowGasTx}, true)
-	if err != nil {
-		t.Fatalf("PrepareBlockForTest: %v", err)
-	}
-	isOrphan, delay, err = dag.ProcessBlock(util.NewBlock(overflowGasBlock), blockdag.BFNoPoWCheck)
-	if err == nil {
-		t.Fatalf("ProcessBlock expected to have an error")
-	}
-	rErr, ok = err.(blockdag.RuleError)
-	if !ok {
-		t.Fatalf("ProcessBlock expected a RuleError, but got %v", err)
-	} else if rErr.ErrorCode != blockdag.ErrInvalidGas {
-		t.Fatalf("ProcessBlock expected error code %s but got %s", blockdag.ErrInvalidGas, rErr.ErrorCode)
-	}
-	if isOrphan {
-		t.Fatalf("ProcessBlock: overLimitBlock got unexpectedly orphan")
-	}
-
-	nonExistentSubnetwork := &subnetworkid.SubnetworkID{123}
-	nonExistentSubnetworkTxIn := &wire.TxIn{
-		PreviousOutpoint: *wire.NewOutpoint(cbTxs[3].TxID(), 0),
-		Sequence:         wire.MaxTxInSequenceNum,
-		SignatureScript:  signatureScript,
-	}
-	nonExistentSubnetworkTxOut := &wire.TxOut{
-		Value:        cbTxs[3].TxOut[0].Value,
-		ScriptPubKey: scriptPubKey,
-	}
-	nonExistentSubnetworkTx := wire.NewSubnetworkMsgTx(wire.TxVersion, []*wire.TxIn{nonExistentSubnetworkTxIn},
-		[]*wire.TxOut{nonExistentSubnetworkTxOut}, nonExistentSubnetwork, 1, []byte{})
-
-	nonExistentSubnetworkBlock, err := mining.PrepareBlockForTest(dag, &params, dag.TipHashes(), []*wire.MsgTx{nonExistentSubnetworkTx, overflowGasTx}, true)
-	if err != nil {
-		t.Fatalf("PrepareBlockForTest: %v", err)
-	}
-
-	// Here we check that we can't process a block with a transaction from a non-existent subnetwork
-	isOrphan, delay, err = dag.ProcessBlock(util.NewBlock(nonExistentSubnetworkBlock), blockdag.BFNoPoWCheck)
-	expectedErrStr := fmt.Sprintf("Error getting gas limit for subnetworkID '%s': subnetwork '%s' not found",
-		nonExistentSubnetwork, nonExistentSubnetwork)
-	if err.Error() != expectedErrStr {
-		t.Fatalf("ProcessBlock expected error \"%v\" but got \"%v\"", expectedErrStr, err)
-	}
-
-	// Here we check that we can process a block with a transaction that doesn't exceed the gas limit
-	validBlock, err := mining.PrepareBlockForTest(dag, &params, dag.TipHashes(), []*wire.MsgTx{tx1}, true)
-	if err != nil {
-		t.Fatalf("PrepareBlockForTest: %v", err)
-	}
-	isOrphan, delay, err = dag.ProcessBlock(util.NewBlock(validBlock), blockdag.BFNoPoWCheck)
-	if err != nil {
-		t.Fatalf("ProcessBlock: %v", err)
-	}
-	if delay != 0 {
-		t.Fatalf("ProcessBlock: overLimitBlock " +
-			"is too far in the future")
-	}
-	if isOrphan {
-		t.Fatalf("ProcessBlock: overLimitBlock got unexpectedly orphan")
-	}
-}

blockdag/fullblocks_test.go

@@ -1,318 +0,0 @@
-// Copyright (c) 2016 The Decred developers
-// Copyright (c) 2016-2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag_test
-
-import (
-	"bytes"
-	"fmt"
-	"os"
-	"path/filepath"
-	"testing"
-
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/blockdag/fullblocktests"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/database"
-	_ "github.com/daglabs/btcd/database/ffldb"
-	"github.com/daglabs/btcd/txscript"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-)
-
-const (
-	// testDbType is the database backend type to use for the tests.
-	testDbType = "ffldb"
-
-	// testDbRoot is the root directory used to create all test databases.
-	testDbRoot = "testdbs"
-
-	// blockDataNet is the expected network in the test block data.
-	blockDataNet = wire.MainNet
-)
-
-// filesExists returns whether or not the named file or directory exists.
-func fileExists(name string) bool {
-	if _, err := os.Stat(name); err != nil {
-		if os.IsNotExist(err) {
-			return false
-		}
-	}
-	return true
-}
-
-// isSupportedDbType returns whether or not the passed database type is
-// currently supported.
-func isSupportedDbType(dbType string) bool {
-	supportedDrivers := database.SupportedDrivers()
-	for _, driver := range supportedDrivers {
-		if dbType == driver {
-			return true
-		}
-	}
-
-	return false
-}
-
-// DAGSetup is used to create a new db and chain instance with the genesis
-// block already inserted.  In addition to the new chain instance, it returns
-// a teardown function the caller should invoke when done testing to clean up.
-func DAGSetup(dbName string, params *dagconfig.Params) (*blockdag.BlockDAG, func(), error) {
-	if !isSupportedDbType(testDbType) {
-		return nil, nil, fmt.Errorf("unsupported db type %v", testDbType)
-	}
-
-	// Handle memory database specially since it doesn't need the disk
-	// specific handling.
-	var db database.DB
-	var teardown func()
-	if testDbType == "memdb" {
-		ndb, err := database.Create(testDbType)
-		if err != nil {
-			return nil, nil, fmt.Errorf("error creating db: %v", err)
-		}
-		db = ndb
-
-		// Setup a teardown function for cleaning up.  This function is
-		// returned to the caller to be invoked when it is done testing.
-		teardown = func() {
-			db.Close()
-		}
-	} else {
-		// Create the root directory for test databases.
-		if !fileExists(testDbRoot) {
-			if err := os.MkdirAll(testDbRoot, 0700); err != nil {
-				err := fmt.Errorf("unable to create test db "+
-					"root: %v", err)
-				return nil, nil, err
-			}
-		}
-
-		// Create a new database to store the accepted blocks into.
-		dbPath := filepath.Join(testDbRoot, dbName)
-		_ = os.RemoveAll(dbPath)
-		ndb, err := database.Create(testDbType, dbPath, blockDataNet)
-		if err != nil {
-			return nil, nil, fmt.Errorf("error creating db: %v", err)
-		}
-		db = ndb
-
-		// Setup a teardown function for cleaning up.  This function is
-		// returned to the caller to be invoked when it is done testing.
-		teardown = func() {
-			db.Close()
-			os.RemoveAll(dbPath)
-			os.RemoveAll(testDbRoot)
-		}
-	}
-
-	// Copy the chain params to ensure any modifications the tests do to
-	// the DAG parameters do not affect the global instance.
-	paramsCopy := *params
-
-	// Create the main chain instance.
-	chain, err := blockdag.New(&blockdag.Config{
-		DB:          db,
-		DAGParams:   &paramsCopy,
-		Checkpoints: nil,
-		TimeSource:  blockdag.NewMedianTime(),
-		SigCache:    txscript.NewSigCache(1000),
-	})
-	if err != nil {
-		teardown()
-		err := fmt.Errorf("failed to create chain instance: %v", err)
-		return nil, nil, err
-	}
-	return chain, teardown, nil
-}
-
-// TestFullBlocks ensures all tests generated by the fullblocktests package
-// have the expected result when processed via ProcessBlock.
-func TestFullBlocks(t *testing.T) {
-	// TODO: (Stas) This test was disabled for until we have implemented Phantom
-	// Ticket: https://daglabs.atlassian.net/browse/DEV-60
-	t.SkipNow()
-
-	tests, err := fullblocktests.Generate(false)
-	if err != nil {
-		t.Fatalf("failed to generate tests: %v", err)
-	}
-
-	// Create a new database and chain instance to run tests against.
-	dag, teardownFunc, err := DAGSetup("fullblocktest",
-		&dagconfig.RegressionNetParams)
-	if err != nil {
-		t.Errorf("Failed to setup chain instance: %v", err)
-		return
-	}
-	defer teardownFunc()
-
-	// testAcceptedBlock attempts to process the block in the provided test
-	// instance and ensures that it was accepted according to the flags
-	// specified in the test.
-	testAcceptedBlock := func(item fullblocktests.AcceptedBlock) {
-		blockHeight := item.Height
-		block := util.NewBlock(item.Block)
-		block.SetChainHeight(blockHeight)
-		t.Logf("Testing block %s (hash %s, height %d)",
-			item.Name, block.Hash(), blockHeight)
-
-		isOrphan, delay, err := dag.ProcessBlock(block,
-			blockdag.BFNone)
-		if err != nil {
-			t.Fatalf("block %q (hash %s, height %d) should "+
-				"have been accepted: %v", item.Name,
-				block.Hash(), blockHeight, err)
-		}
-
-		if delay != item.Delay {
-			t.Fatalf("block %q (hash %s, height %d) unexpected "+
-				"delay -- got %v, want %v", item.Name,
-				block.Hash(), blockHeight, delay,
-				item.Delay)
-		}
-
-		if isOrphan != item.IsOrphan {
-			t.Fatalf("block %q (hash %s, height %d) unexpected "+
-				"orphan flag -- got %v, want %v", item.Name,
-				block.Hash(), blockHeight, isOrphan,
-				item.IsOrphan)
-		}
-	}
-
-	// testRejectedBlock attempts to process the block in the provided test
-	// instance and ensures that it was rejected with the reject code
-	// specified in the test.
-	testRejectedBlock := func(item fullblocktests.RejectedBlock) {
-		blockHeight := item.Height
-		block := util.NewBlock(item.Block)
-		block.SetChainHeight(blockHeight)
-		t.Logf("Testing block %s (hash %s, height %d)",
-			item.Name, block.Hash(), blockHeight)
-
-		_, _, err := dag.ProcessBlock(block, blockdag.BFNone)
-		if err == nil {
-			t.Fatalf("block %q (hash %s, height %d) should not "+
-				"have been accepted", item.Name, block.Hash(),
-				blockHeight)
-		}
-
-		// Ensure the error code is of the expected type and the reject
-		// code matches the value specified in the test instance.
-		rerr, ok := err.(blockdag.RuleError)
-		if !ok {
-			t.Fatalf("block %q (hash %s, height %d) returned "+
-				"unexpected error type -- got %T, want "+
-				"blockchain.RuleError", item.Name, block.Hash(),
-				blockHeight, err)
-		}
-		if rerr.ErrorCode != item.RejectCode {
-			t.Fatalf("block %q (hash %s, height %d) does not have "+
-				"expected reject code -- got %v, want %v",
-				item.Name, block.Hash(), blockHeight,
-				rerr.ErrorCode, item.RejectCode)
-		}
-	}
-
-	// testRejectedNonCanonicalBlock attempts to decode the block in the
-	// provided test instance and ensures that it failed to decode with a
-	// message error.
-	testRejectedNonCanonicalBlock := func(item fullblocktests.RejectedNonCanonicalBlock) {
-		headerLen := len(item.RawBlock)
-		if headerLen > 80 {
-			headerLen = 80
-		}
-		blockHash := daghash.DoubleHashH(item.RawBlock[0:headerLen])
-		blockHeight := item.Height
-		t.Logf("Testing block %s (hash %s, height %d)", item.Name,
-			blockHash, blockHeight)
-
-		// Ensure there is an error due to deserializing the block.
-		var msgBlock wire.MsgBlock
-		err := msgBlock.BtcDecode(bytes.NewReader(item.RawBlock), 0)
-		if _, ok := err.(*wire.MessageError); !ok {
-			t.Fatalf("block %q (hash %s, height %d) should have "+
-				"failed to decode", item.Name, blockHash,
-				blockHeight)
-		}
-	}
-
-	// testOrphanOrRejectedBlock attempts to process the block in the
-	// provided test instance and ensures that it was either accepted as an
-	// orphan or rejected with a rule violation.
-	testOrphanOrRejectedBlock := func(item fullblocktests.OrphanOrRejectedBlock) {
-		blockHeight := item.Height
-		block := util.NewBlock(item.Block)
-		block.SetChainHeight(blockHeight)
-		t.Logf("Testing block %s (hash %s, height %d)",
-			item.Name, block.Hash(), blockHeight)
-
-		isOrphan, delay, err := dag.ProcessBlock(block, blockdag.BFNone)
-		if err != nil {
-			// Ensure the error code is of the expected type.
-			if _, ok := err.(blockdag.RuleError); !ok {
-				t.Fatalf("block %q (hash %s, height %d) "+
-					"returned unexpected error type -- "+
-					"got %T, want blockchain.RuleError",
-					item.Name, block.Hash(), blockHeight,
-					err)
-			}
-		}
-
-		if delay != 0 {
-			t.Fatalf("block %q (hash %s, height %d) "+
-				"is too far in the future",
-				item.Name, block.Hash(), blockHeight)
-		}
-
-		if !isOrphan {
-			t.Fatalf("block %q (hash %s, height %d) was accepted, "+
-				"but is not considered an orphan", item.Name,
-				block.Hash(), blockHeight)
-		}
-	}
-
-	// testExpectedTip ensures the current tip of the blockchain is the
-	// block specified in the provided test instance.
-	testExpectedTip := func(item fullblocktests.ExpectedTip) {
-		blockHeight := item.Height
-		block := util.NewBlock(item.Block)
-		block.SetChainHeight(blockHeight)
-		t.Logf("Testing tip for block %s (hash %s, height %d)",
-			item.Name, block.Hash(), blockHeight)
-
-		// Ensure hash and height match.
-		if dag.SelectedTipHash() != item.Block.BlockHash() ||
-			dag.ChainHeight() != blockHeight { //TODO: (Ori) the use of dag.ChainHeight() and virtualBlock.HighestTipHash() is wrong, and was done only for compilation
-
-			t.Fatalf("block %q (hash %s, height %d) should be "+
-				"the current tip -- got (hash %s, height %d)",
-				item.Name, block.Hash(), blockHeight, dag.SelectedTipHash(),
-				dag.ChainHeight()) //TODO: (Ori) the use of dag.ChainHeight() and virtualBlock.HighestTipHash() is wrong, and was done only for compilation
-		}
-	}
-
-	for testNum, test := range tests {
-		for itemNum, item := range test {
-			switch item := item.(type) {
-			case fullblocktests.AcceptedBlock:
-				testAcceptedBlock(item)
-			case fullblocktests.RejectedBlock:
-				testRejectedBlock(item)
-			case fullblocktests.RejectedNonCanonicalBlock:
-				testRejectedNonCanonicalBlock(item)
-			case fullblocktests.OrphanOrRejectedBlock:
-				testOrphanOrRejectedBlock(item)
-			case fullblocktests.ExpectedTip:
-				testExpectedTip(item)
-			default:
-				t.Fatalf("test #%d, item #%d is not one of "+
-					"the supported test instance types -- "+
-					"got type: %T", testNum, itemNum, item)
-			}
-		}
-	}
-}

blockdag/fullblocktests/README.md

@@ -1,29 +0,0 @@
-fullblocktests
-==============
-
-[![Build Status](http://img.shields.io/travis/btcsuite/btcd.svg)](https://travis-ci.org/btcsuite/btcd)
-[![ISC License](http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
-[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](http://godoc.org/github.com/daglabs/btcd/blockchain/fullblocktests)
-
-Package fullblocktests provides a set of full block tests to be used for testing
-the consensus validation rules.  The tests are intended to be flexible enough to
-allow both unit-style tests directly against the blockchain code as well as
-integration style tests over the peer-to-peer network.  To achieve that goal,
-each test contains additional information about the expected result, however
-that information can be ignored when doing comparison tests between two
-independent versions over the peer-to-peer network.
-
-This package has intentionally been designed so it can be used as a standalone
-package for any projects needing to test their implementation against a full set
-of blocks that exercise the consensus validation rules.
-
-## Installation and Updating
-
-```bash
-$ go get -u github.com/daglabs/btcd/blockchain/fullblocktests
-```
-
-## License
-
-Package fullblocktests is licensed under the [copyfree](http://copyfree.org) ISC
-License.

blockdag/fullblocktests/doc.go

@@ -1,20 +0,0 @@
-// Copyright (c) 2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-/*
-Package fullblocktests provides a set of block consensus validation tests.
-
-All of the generated test instances involve full blocks that are to be used for
-testing the consensus validation rules.  The tests are intended to be flexible
-enough to allow both unit-style tests directly against the blockchain code as
-well as integration style tests over the peer-to-peer network.  To achieve that
-goal, each test contains additional information about the expected result,
-however that information can be ignored when doing comparison tests between two
-independent versions over the peer-to-peer network.
-
-This package has intentionally been designed so it can be used as a standalone
-package for any projects needing to test their implementation against a full set
-of blocks that exercise the consensus validation rules.
-*/
-package fullblocktests

blockdag/fullblocktests/params.go

@@ -1,143 +0,0 @@
-// Copyright (c) 2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package fullblocktests
-
-import (
-	"encoding/hex"
-	"math"
-	"math/big"
-	"time"
-
-	"github.com/daglabs/btcd/util/hdkeychain"
-	"github.com/daglabs/btcd/util/subnetworkid"
-
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-)
-
-// newHashFromStr converts the passed big-endian hex string into a
-// wire.Hash.  It only differs from the one available in daghash in that
-// it panics on an error since it will only (and must only) be called with
-// hard-coded, and therefore known good, hashes.
-func newHashFromStr(hexStr string) *daghash.Hash {
-	hash, err := daghash.NewHashFromStr(hexStr)
-	if err != nil {
-		panic(err)
-	}
-	return hash
-}
-
-// newTxIDFromStr converts the passed big-endian hex string into a
-// wire.TxID.  It only differs from the one available in daghash in that
-// it panics on an error since it will only (and must only) be called with
-// hard-coded, and therefore known good, hashes.
-func newTxIDFromStr(hexStr string) *daghash.TxID {
-	txID, err := daghash.NewTxIDFromStr(hexStr)
-	if err != nil {
-		panic(err)
-	}
-	return txID
-}
-
-// fromHex converts the passed hex string into a byte slice and will panic if
-// there is an error.  This is only provided for the hard-coded constants so
-// errors in the source code can be detected. It will only (and must only) be
-// called for initialization purposes.
-func fromHex(s string) []byte {
-	r, err := hex.DecodeString(s)
-	if err != nil {
-		panic("invalid hex in source file: " + s)
-	}
-	return r
-}
-
-var (
-	// bigOne is 1 represented as a big.Int.  It is defined here to avoid
-	// the overhead of creating it multiple times.
-	bigOne = big.NewInt(1)
-
-	// regressionPowLimit is the highest proof of work value a Bitcoin block
-	// can have for the regression test network.  It is the value 2^255 - 1.
-	regressionPowLimit = new(big.Int).Sub(new(big.Int).Lsh(bigOne, 255), bigOne)
-
-	// regTestGenesisBlock defines the genesis block of the block chain which serves
-	// as the public transaction ledger for the regression test network.
-	regTestGenesisBlock = wire.MsgBlock{
-		Header: wire.BlockHeader{
-			Version:        1,
-			ParentHashes:   []*daghash.Hash{},
-			HashMerkleRoot: newHashFromStr("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"),
-			Timestamp:      time.Unix(0x5b28c636, 0), // 2018-06-19 09:00:38 +0000 UTC
-			Bits:           0x207fffff,               // 545259519 [7fffff0000000000000000000000000000000000000000000000000000000000]
-			Nonce:          1,
-		},
-		Transactions: []*wire.MsgTx{{
-			Version: 1,
-			TxIn: []*wire.TxIn{{
-				PreviousOutpoint: wire.Outpoint{
-					TxID:  daghash.TxID{},
-					Index: 0xffffffff,
-				},
-				SignatureScript: fromHex("04ffff001d010445" +
-					"5468652054696d65732030332f4a616e2f" +
-					"32303039204368616e63656c6c6f72206f" +
-					"6e206272696e6b206f66207365636f6e64" +
-					"206261696c6f757420666f72206261686b73"),
-				Sequence: math.MaxUint64,
-			}},
-			TxOut: []*wire.TxOut{{
-				Value: 0,
-				ScriptPubKey: fromHex("4104678afdb0fe5548271967f1" +
-					"a67130b7105cd6a828e03909a67962e0ea1f" +
-					"61deb649f6bc3f4cef38c4f35504e51ec138" +
-					"c4f35504e51ec112de5c384df7ba0b8d578a" +
-					"4c702b6bf11d5fac"),
-			}},
-			LockTime:     0,
-			SubnetworkID: *subnetworkid.SubnetworkIDNative,
-		}},
-	}
-)
-
-// regressionNetParams defines the network parameters for the regression test
-// network.
-//
-// NOTE: The test generator intentionally does not use the existing definitions
-// in the dagconfig package since the intent is to be able to generate known
-// good tests which exercise that code.  Using the dagconfig parameters would
-// allow them to change out from under the tests potentially invalidating them.
-var regressionNetParams = &dagconfig.Params{
-	Name:        "regtest",
-	Net:         wire.RegTest,
-	DefaultPort: "18444",
-
-	// DAG parameters
-	GenesisBlock:                   &regTestGenesisBlock,
-	GenesisHash:                    newHashFromStr("5bec7567af40504e0994db3b573c186fffcc4edefe096ff2e58d00523bd7e8a6"),
-	PowMax:                         regressionPowLimit,
-	BlockCoinbaseMaturity:          100,
-	SubsidyReductionInterval:       150,
-	TargetTimePerBlock:             time.Second * 10, // 10 seconds
-	DifficultyAdjustmentWindowSize: 2640,
-	TimestampDeviationTolerance:    132,
-	GenerateSupported:              true,
-
-	// Checkpoints ordered from oldest to newest.
-	Checkpoints: nil,
-
-	// Mempool parameters
-	RelayNonStdTxs: true,
-
-	// Address encoding magics
-	PrivateKeyID: 0xef, // starts with 9 (uncompressed) or c (compressed)
-
-	// BIP32 hierarchical deterministic extended key magics
-	HDKeyIDPair: hdkeychain.HDKeyPairRegressionNet,
-
-	// BIP44 coin type used in the hierarchical deterministic path for
-	// address generation.
-	HDCoinType: 1,
-}

blockdag/indexers/acceptanceindex.go

@@ -1,225 +0,0 @@
-package indexers
-
-import (
-	"bytes"
-	"encoding/gob"
-	"fmt"
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-)
-
-const (
-	// acceptanceIndexName is the human-readable name for the index.
-	acceptanceIndexName = "acceptance index"
-)
-
-var (
-	// acceptanceIndexKey is the key of the acceptance index and the db bucket used
-	// to house it.
-	acceptanceIndexKey = []byte("acceptanceidx")
-)
-
-// AcceptanceIndex implements a txAcceptanceData by block hash index. That is to say,
-// it stores a mapping between a block's hash and the set of transactions that the
-// block accepts among its blue blocks.
-type AcceptanceIndex struct {
-	db  database.DB
-	dag *blockdag.BlockDAG
-}
-
-// Ensure the AcceptanceIndex type implements the Indexer interface.
-var _ Indexer = (*AcceptanceIndex)(nil)
-
-// NewAcceptanceIndex returns a new instance of an indexer that is used to create a
-// mapping between block hashes and their txAcceptanceData.
-//
-// It implements the Indexer interface which plugs into the IndexManager that in
-// turn is used by the blockdag package. This allows the index to be
-// seamlessly maintained along with the DAG.
-func NewAcceptanceIndex() *AcceptanceIndex {
-	return &AcceptanceIndex{}
-}
-
-// DropAcceptanceIndex drops the acceptance index from the provided database if it
-// exists.
-func DropAcceptanceIndex(db database.DB, interrupt <-chan struct{}) error {
-	return dropIndex(db, acceptanceIndexKey, acceptanceIndexName, interrupt)
-}
-
-// Key returns the database key to use for the index as a byte slice.
-//
-// This is part of the Indexer interface.
-func (idx *AcceptanceIndex) Key() []byte {
-	return acceptanceIndexKey
-}
-
-// Name returns the human-readable name of the index.
-//
-// This is part of the Indexer interface.
-func (idx *AcceptanceIndex) Name() string {
-	return acceptanceIndexName
-}
-
-// Create is invoked when the indexer manager determines the index needs
-// to be created for the first time.  It creates the bucket for the
-// acceptance index.
-//
-// This is part of the Indexer interface.
-func (idx *AcceptanceIndex) Create(dbTx database.Tx) error {
-	_, err := dbTx.Metadata().CreateBucket(acceptanceIndexKey)
-	return err
-}
-
-// Init initializes the hash-based acceptance index.
-//
-// This is part of the Indexer interface.
-func (idx *AcceptanceIndex) Init(db database.DB, dag *blockdag.BlockDAG) error {
-	idx.db = db
-	idx.dag = dag
-	return nil
-}
-
-// ConnectBlock is invoked by the index manager when a new block has been
-// connected to the DAG.
-//
-// This is part of the Indexer interface.
-func (idx *AcceptanceIndex) ConnectBlock(dbTx database.Tx, _ *util.Block, blockID uint64, _ *blockdag.BlockDAG,
-	txsAcceptanceData blockdag.MultiBlockTxsAcceptanceData, _ blockdag.MultiBlockTxsAcceptanceData) error {
-	return dbPutTxsAcceptanceData(dbTx, blockID, txsAcceptanceData)
-}
-
-// TxsAcceptanceData returns the acceptance data of all the transactions that
-// were accepted by the block with hash blockHash.
-func (idx *AcceptanceIndex) TxsAcceptanceData(blockHash *daghash.Hash) (blockdag.MultiBlockTxsAcceptanceData, error) {
-	var txsAcceptanceData blockdag.MultiBlockTxsAcceptanceData
-	err := idx.db.View(func(dbTx database.Tx) error {
-		var err error
-		txsAcceptanceData, err = dbFetchTxsAcceptanceDataByHash(dbTx, blockHash)
-		return err
-	})
-	if err != nil {
-		return nil, err
-	}
-	return txsAcceptanceData, nil
-}
-
-// Recover is invoked when the indexer wasn't turned on for several blocks
-// and the indexer needs to close the gaps.
-//
-// This is part of the Indexer interface.
-func (idx *AcceptanceIndex) Recover(dbTx database.Tx, currentBlockID, lastKnownBlockID uint64) error {
-	for blockID := currentBlockID + 1; blockID <= lastKnownBlockID; blockID++ {
-		hash, err := blockdag.DBFetchBlockHashByID(dbTx, currentBlockID)
-		if err != nil {
-			return err
-		}
-		txAcceptanceData, err := idx.dag.TxsAcceptedByBlockHash(hash)
-		if err != nil {
-			return err
-		}
-		err = idx.ConnectBlock(dbTx, nil, blockID, nil, txAcceptanceData, nil)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func dbPutTxsAcceptanceData(dbTx database.Tx, blockID uint64,
-	txsAcceptanceData blockdag.MultiBlockTxsAcceptanceData) error {
-	serializedTxsAcceptanceData, err := serializeMultiBlockTxsAcceptanceData(txsAcceptanceData)
-	if err != nil {
-		return err
-	}
-
-	bucket := dbTx.Metadata().Bucket(acceptanceIndexKey)
-	return bucket.Put(blockdag.SerializeBlockID(blockID), serializedTxsAcceptanceData)
-}
-
-func dbFetchTxsAcceptanceDataByHash(dbTx database.Tx,
-	hash *daghash.Hash) (blockdag.MultiBlockTxsAcceptanceData, error) {
-
-	blockID, err := blockdag.DBFetchBlockIDByHash(dbTx, hash)
-	if err != nil {
-		return nil, err
-	}
-
-	return dbFetchTxsAcceptanceDataByID(dbTx, blockID)
-}
-
-func dbFetchTxsAcceptanceDataByID(dbTx database.Tx,
-	blockID uint64) (blockdag.MultiBlockTxsAcceptanceData, error) {
-	serializedBlockID := blockdag.SerializeBlockID(blockID)
-	bucket := dbTx.Metadata().Bucket(acceptanceIndexKey)
-	serializedTxsAcceptanceData := bucket.Get(serializedBlockID)
-	if serializedTxsAcceptanceData == nil {
-		return nil, fmt.Errorf("no entry in the accpetance index for block id %d", blockID)
-	}
-
-	return deserializeMultiBlockTxsAcceptanceData(serializedTxsAcceptanceData)
-}
-
-type serializableTxAcceptanceData struct {
-	MsgTx      wire.MsgTx
-	IsAccepted bool
-}
-
-type serializableBlockTxsAcceptanceData []serializableTxAcceptanceData
-
-type serializableMultiBlockTxsAcceptanceData map[daghash.Hash]serializableBlockTxsAcceptanceData
-
-func serializeMultiBlockTxsAcceptanceData(
-	txsAcceptanceData blockdag.MultiBlockTxsAcceptanceData) ([]byte, error) {
-	// Convert MultiBlockTxsAcceptanceData to a serializable format
-	serializableData := make(serializableMultiBlockTxsAcceptanceData, len(txsAcceptanceData))
-	for hash, blockTxsAcceptanceData := range txsAcceptanceData {
-		serializableBlockData := make(serializableBlockTxsAcceptanceData, len(blockTxsAcceptanceData))
-		for i, txAcceptanceData := range blockTxsAcceptanceData {
-			serializableBlockData[i] = serializableTxAcceptanceData{
-				MsgTx:      *txAcceptanceData.Tx.MsgTx(),
-				IsAccepted: txAcceptanceData.IsAccepted,
-			}
-		}
-		serializableData[hash] = serializableBlockData
-	}
-
-	// Serialize
-	var buffer bytes.Buffer
-	encoder := gob.NewEncoder(&buffer)
-	err := encoder.Encode(serializableData)
-	if err != nil {
-		return nil, err
-	}
-	return buffer.Bytes(), nil
-}
-
-func deserializeMultiBlockTxsAcceptanceData(
-	serializedTxsAcceptanceData []byte) (blockdag.MultiBlockTxsAcceptanceData, error) {
-	// Deserialize
-	buffer := bytes.NewBuffer(serializedTxsAcceptanceData)
-	decoder := gob.NewDecoder(buffer)
-	var serializedData serializableMultiBlockTxsAcceptanceData
-	err := decoder.Decode(&serializedData)
-	if err != nil {
-		return nil, err
-	}
-
-	// Convert serializable format to MultiBlockTxsAcceptanceData
-	txsAcceptanceData := make(blockdag.MultiBlockTxsAcceptanceData, len(serializedData))
-	for hash, serializableBlockData := range serializedData {
-		blockTxsAcceptanceData := make(blockdag.BlockTxsAcceptanceData, len(serializableBlockData))
-		for i, txData := range serializableBlockData {
-			msgTx := txData.MsgTx
-			blockTxsAcceptanceData[i] = blockdag.TxAcceptanceData{
-				Tx:         util.NewTx(&msgTx),
-				IsAccepted: txData.IsAccepted,
-			}
-		}
-		txsAcceptanceData[hash] = blockTxsAcceptanceData
-	}
-
-	return txsAcceptanceData, nil
-}

blockdag/indexers/addrindex.go

@@ -1,924 +0,0 @@
-// Copyright (c) 2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package indexers
-
-import (
-	"errors"
-	"fmt"
-	"sync"
-
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/txscript"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-)
-
-const (
-	// addrIndexName is the human-readable name for the index.
-	addrIndexName = "address index"
-
-	// level0MaxEntries is the maximum number of transactions that are
-	// stored in level 0 of an address index entry.  Subsequent levels store
-	// 2^n * level0MaxEntries entries, or in words, double the maximum of
-	// the previous level.
-	level0MaxEntries = 8
-
-	// addrKeySize is the number of bytes an address key consumes in the
-	// index.  It consists of 1 byte address type + 20 bytes hash160.
-	addrKeySize = 1 + 20
-
-	// levelKeySize is the number of bytes a level key in the address index
-	// consumes.  It consists of the address key + 1 byte for the level.
-	levelKeySize = addrKeySize + 1
-
-	// levelOffset is the offset in the level key which identifes the level.
-	levelOffset = levelKeySize - 1
-
-	// addrKeyTypePubKeyHash is the address type in an address key which
-	// represents both a pay-to-pubkey-hash and a pay-to-pubkey address.
-	// This is done because both are identical for the purposes of the
-	// address index.
-	addrKeyTypePubKeyHash = 0
-
-	// addrKeyTypeScriptHash is the address type in an address key which
-	// represents a pay-to-script-hash address.  This is necessary because
-	// the hash of a pubkey address might be the same as that of a script
-	// hash.
-	addrKeyTypeScriptHash = 1
-
-	// Size of a transaction entry.  It consists of 8 bytes block id + 4
-	// bytes offset + 4 bytes length.
-	txEntrySize = 8 + 4 + 4
-)
-
-var (
-	// addrIndexKey is the key of the address index and the db bucket used
-	// to house it.
-	addrIndexKey = []byte("txbyaddridx")
-
-	// errUnsupportedAddressType is an error that is used to signal an
-	// unsupported address type has been used.
-	errUnsupportedAddressType = errors.New("address type is not supported " +
-		"by the address index")
-)
-
-// -----------------------------------------------------------------------------
-// The address index maps addresses referenced in the blockchain to a list of
-// all the transactions involving that address.  Transactions are stored
-// according to their order of appearance in the blockchain.  That is to say
-// first by block height and then by offset inside the block.  It is also
-// important to note that this implementation requires the transaction index
-// since it is needed in order to catch up old blocks due to the fact the spent
-// outputs will already be pruned from the utxo set.
-//
-// The approach used to store the index is similar to a log-structured merge
-// tree (LSM tree) and is thus similar to how leveldb works internally.
-//
-// Every address consists of one or more entries identified by a level starting
-// from 0 where each level holds a maximum number of entries such that each
-// subsequent level holds double the maximum of the previous one.  In equation
-// form, the number of entries each level holds is 2^n * firstLevelMaxSize.
-//
-// New transactions are appended to level 0 until it becomes full at which point
-// the entire level 0 entry is appended to the level 1 entry and level 0 is
-// cleared.  This process continues until level 1 becomes full at which point it
-// will be appended to level 2 and cleared and so on.
-//
-// The result of this is the lower levels contain newer transactions and the
-// transactions within each level are ordered from oldest to newest.
-//
-// The intent of this approach is to provide a balance between space efficiency
-// and indexing cost.  Storing one entry per transaction would have the lowest
-// indexing cost, but would waste a lot of space because the same address hash
-// would be duplicated for every transaction key.  On the other hand, storing a
-// single entry with all transactions would be the most space efficient, but
-// would cause indexing cost to grow quadratically with the number of
-// transactions involving the same address.  The approach used here provides
-// logarithmic insertion and retrieval.
-//
-// The serialized key format is:
-//
-//   <addr type><addr hash><level>
-//
-//   Field           Type      Size
-//   addr type       uint8     1 byte
-//   addr hash       hash160   20 bytes
-//   level           uint8     1 byte
-//   -----
-//   Total: 22 bytes
-//
-// The serialized value format is:
-//
-//   [<block id><start offset><tx length>,...]
-//
-//   Field           Type      Size
-//   block id        uint64    8 bytes
-//   start offset    uint32    4 bytes
-//   tx length       uint32    4 bytes
-//   -----
-//   Total: 16 bytes per indexed tx
-// -----------------------------------------------------------------------------
-
-// fetchBlockHashFunc defines a callback function to use in order to convert a
-// serialized block ID to an associated block hash.
-type fetchBlockHashFunc func(serializedID []byte) (*daghash.Hash, error)
-
-// serializeAddrIndexEntry serializes the provided block id and transaction
-// location according to the format described in detail above.
-func serializeAddrIndexEntry(blockID uint64, txLoc wire.TxLoc) []byte {
-	// Serialize the entry.
-	serialized := make([]byte, 16)
-	byteOrder.PutUint64(serialized, blockID)
-	byteOrder.PutUint32(serialized[8:], uint32(txLoc.TxStart))
-	byteOrder.PutUint32(serialized[12:], uint32(txLoc.TxLen))
-	return serialized
-}
-
-// deserializeAddrIndexEntry decodes the passed serialized byte slice into the
-// provided region struct according to the format described in detail above and
-// uses the passed block hash fetching function in order to conver the block ID
-// to the associated block hash.
-func deserializeAddrIndexEntry(serialized []byte, region *database.BlockRegion, fetchBlockHash fetchBlockHashFunc) error {
-	// Ensure there are enough bytes to decode.
-	if len(serialized) < txEntrySize {
-		return errDeserialize("unexpected end of data")
-	}
-
-	hash, err := fetchBlockHash(serialized[0:8])
-	if err != nil {
-		return err
-	}
-	region.Hash = hash
-	region.Offset = byteOrder.Uint32(serialized[8:12])
-	region.Len = byteOrder.Uint32(serialized[12:16])
-	return nil
-}
-
-// keyForLevel returns the key for a specific address and level in the address
-// index entry.
-func keyForLevel(addrKey [addrKeySize]byte, level uint8) [levelKeySize]byte {
-	var key [levelKeySize]byte
-	copy(key[:], addrKey[:])
-	key[levelOffset] = level
-	return key
-}
-
-// dbPutAddrIndexEntry updates the address index to include the provided entry
-// according to the level-based scheme described in detail above.
-func dbPutAddrIndexEntry(bucket internalBucket, addrKey [addrKeySize]byte, blockID uint64, txLoc wire.TxLoc) error {
-	// Start with level 0 and its initial max number of entries.
-	curLevel := uint8(0)
-	maxLevelBytes := level0MaxEntries * txEntrySize
-
-	// Simply append the new entry to level 0 and return now when it will
-	// fit.  This is the most common path.
-	newData := serializeAddrIndexEntry(blockID, txLoc)
-	level0Key := keyForLevel(addrKey, 0)
-	level0Data := bucket.Get(level0Key[:])
-	if len(level0Data)+len(newData) <= maxLevelBytes {
-		mergedData := newData
-		if len(level0Data) > 0 {
-			mergedData = make([]byte, len(level0Data)+len(newData))
-			copy(mergedData, level0Data)
-			copy(mergedData[len(level0Data):], newData)
-		}
-		return bucket.Put(level0Key[:], mergedData)
-	}
-
-	// At this point, level 0 is full, so merge each level into higher
-	// levels as many times as needed to free up level 0.
-	prevLevelData := level0Data
-	for {
-		// Each new level holds twice as much as the previous one.
-		curLevel++
-		maxLevelBytes *= 2
-
-		// Move to the next level as long as the current level is full.
-		curLevelKey := keyForLevel(addrKey, curLevel)
-		curLevelData := bucket.Get(curLevelKey[:])
-		if len(curLevelData) == maxLevelBytes {
-			prevLevelData = curLevelData
-			continue
-		}
-
-		// The current level has room for the data in the previous one,
-		// so merge the data from previous level into it.
-		mergedData := prevLevelData
-		if len(curLevelData) > 0 {
-			mergedData = make([]byte, len(curLevelData)+
-				len(prevLevelData))
-			copy(mergedData, curLevelData)
-			copy(mergedData[len(curLevelData):], prevLevelData)
-		}
-		err := bucket.Put(curLevelKey[:], mergedData)
-		if err != nil {
-			return err
-		}
-
-		// Move all of the levels before the previous one up a level.
-		for mergeLevel := curLevel - 1; mergeLevel > 0; mergeLevel-- {
-			mergeLevelKey := keyForLevel(addrKey, mergeLevel)
-			prevLevelKey := keyForLevel(addrKey, mergeLevel-1)
-			prevData := bucket.Get(prevLevelKey[:])
-			err := bucket.Put(mergeLevelKey[:], prevData)
-			if err != nil {
-				return err
-			}
-		}
-		break
-	}
-
-	// Finally, insert the new entry into level 0 now that it is empty.
-	return bucket.Put(level0Key[:], newData)
-}
-
-// dbFetchAddrIndexEntries returns block regions for transactions referenced by
-// the given address key and the number of entries skipped since it could have
-// been less in the case where there are less total entries than the requested
-// number of entries to skip.
-func dbFetchAddrIndexEntries(bucket internalBucket, addrKey [addrKeySize]byte, numToSkip, numRequested uint32, reverse bool, fetchBlockHash fetchBlockHashFunc) ([]database.BlockRegion, uint32, error) {
-	// When the reverse flag is not set, all levels need to be fetched
-	// because numToSkip and numRequested are counted from the oldest
-	// transactions (highest level) and thus the total count is needed.
-	// However, when the reverse flag is set, only enough records to satisfy
-	// the requested amount are needed.
-	var level uint8
-	var serialized []byte
-	for !reverse || len(serialized) < int(numToSkip+numRequested)*txEntrySize {
-		curLevelKey := keyForLevel(addrKey, level)
-		levelData := bucket.Get(curLevelKey[:])
-		if levelData == nil {
-			// Stop when there are no more levels.
-			break
-		}
-
-		// Higher levels contain older transactions, so prepend them.
-		prepended := make([]byte, len(serialized)+len(levelData))
-		copy(prepended, levelData)
-		copy(prepended[len(levelData):], serialized)
-		serialized = prepended
-		level++
-	}
-
-	// When the requested number of entries to skip is larger than the
-	// number available, skip them all and return now with the actual number
-	// skipped.
-	numEntries := uint32(len(serialized) / txEntrySize)
-	if numToSkip >= numEntries {
-		return nil, numEntries, nil
-	}
-
-	// Nothing more to do when there are no requested entries.
-	if numRequested == 0 {
-		return nil, numToSkip, nil
-	}
-
-	// Limit the number to load based on the number of available entries,
-	// the number to skip, and the number requested.
-	numToLoad := numEntries - numToSkip
-	if numToLoad > numRequested {
-		numToLoad = numRequested
-	}
-
-	// Start the offset after all skipped entries and load the calculated
-	// number.
-	results := make([]database.BlockRegion, numToLoad)
-	for i := uint32(0); i < numToLoad; i++ {
-		// Calculate the read offset according to the reverse flag.
-		var offset uint32
-		if reverse {
-			offset = (numEntries - numToSkip - i - 1) * txEntrySize
-		} else {
-			offset = (numToSkip + i) * txEntrySize
-		}
-
-		// Deserialize and populate the result.
-		err := deserializeAddrIndexEntry(serialized[offset:],
-			&results[i], fetchBlockHash)
-		if err != nil {
-			// Ensure any deserialization errors are returned as
-			// database corruption errors.
-			if isDeserializeErr(err) {
-				err = database.Error{
-					ErrorCode: database.ErrCorruption,
-					Description: fmt.Sprintf("failed to "+
-						"deserialized address index "+
-						"for key %x: %s", addrKey, err),
-				}
-			}
-
-			return nil, 0, err
-		}
-	}
-
-	return results, numToSkip, nil
-}
-
-// minEntriesToReachLevel returns the minimum number of entries that are
-// required to reach the given address index level.
-func minEntriesToReachLevel(level uint8) int {
-	maxEntriesForLevel := level0MaxEntries
-	minRequired := 1
-	for l := uint8(1); l <= level; l++ {
-		minRequired += maxEntriesForLevel
-		maxEntriesForLevel *= 2
-	}
-	return minRequired
-}
-
-// maxEntriesForLevel returns the maximum number of entries allowed for the
-// given address index level.
-func maxEntriesForLevel(level uint8) int {
-	numEntries := level0MaxEntries
-	for l := level; l > 0; l-- {
-		numEntries *= 2
-	}
-	return numEntries
-}
-
-// dbRemoveAddrIndexEntries removes the specified number of entries from from
-// the address index for the provided key.  An assertion error will be returned
-// if the count exceeds the total number of entries in the index.
-func dbRemoveAddrIndexEntries(bucket internalBucket, addrKey [addrKeySize]byte, count int) error {
-	// Nothing to do if no entries are being deleted.
-	if count <= 0 {
-		return nil
-	}
-
-	// Make use of a local map to track pending updates and define a closure
-	// to apply it to the database.  This is done in order to reduce the
-	// number of database reads and because there is more than one exit
-	// path that needs to apply the updates.
-	pendingUpdates := make(map[uint8][]byte)
-	applyPending := func() error {
-		for level, data := range pendingUpdates {
-			curLevelKey := keyForLevel(addrKey, level)
-			if len(data) == 0 {
-				err := bucket.Delete(curLevelKey[:])
-				if err != nil {
-					return err
-				}
-				continue
-			}
-			err := bucket.Put(curLevelKey[:], data)
-			if err != nil {
-				return err
-			}
-		}
-		return nil
-	}
-
-	// Loop forwards through the levels while removing entries until the
-	// specified number has been removed.  This will potentially result in
-	// entirely empty lower levels which will be backfilled below.
-	var highestLoadedLevel uint8
-	numRemaining := count
-	for level := uint8(0); numRemaining > 0; level++ {
-		// Load the data for the level from the database.
-		curLevelKey := keyForLevel(addrKey, level)
-		curLevelData := bucket.Get(curLevelKey[:])
-		if len(curLevelData) == 0 && numRemaining > 0 {
-			return AssertError(fmt.Sprintf("dbRemoveAddrIndexEntries "+
-				"not enough entries for address key %x to "+
-				"delete %d entries", addrKey, count))
-		}
-		pendingUpdates[level] = curLevelData
-		highestLoadedLevel = level
-
-		// Delete the entire level as needed.
-		numEntries := len(curLevelData) / txEntrySize
-		if numRemaining >= numEntries {
-			pendingUpdates[level] = nil
-			numRemaining -= numEntries
-			continue
-		}
-
-		// Remove remaining entries to delete from the level.
-		offsetEnd := len(curLevelData) - (numRemaining * txEntrySize)
-		pendingUpdates[level] = curLevelData[:offsetEnd]
-		break
-	}
-
-	// When all elements in level 0 were not removed there is nothing left
-	// to do other than updating the database.
-	if len(pendingUpdates[0]) != 0 {
-		return applyPending()
-	}
-
-	// At this point there are one or more empty levels before the current
-	// level which need to be backfilled and the current level might have
-	// had some entries deleted from it as well.  Since all levels after
-	// level 0 are required to either be empty, half full, or completely
-	// full, the current level must be adjusted accordingly by backfilling
-	// each previous levels in a way which satisfies the requirements.  Any
-	// entries that are left are assigned to level 0 after the loop as they
-	// are guaranteed to fit by the logic in the loop.  In other words, this
-	// effectively squashes all remaining entries in the current level into
-	// the lowest possible levels while following the level rules.
-	//
-	// Note that the level after the current level might also have entries
-	// and gaps are not allowed, so this also keeps track of the lowest
-	// empty level so the code below knows how far to backfill in case it is
-	// required.
-	lowestEmptyLevel := uint8(255)
-	curLevelData := pendingUpdates[highestLoadedLevel]
-	curLevelMaxEntries := maxEntriesForLevel(highestLoadedLevel)
-	for level := highestLoadedLevel; level > 0; level-- {
-		// When there are not enough entries left in the current level
-		// for the number that would be required to reach it, clear the
-		// the current level which effectively moves them all up to the
-		// previous level on the next iteration.  Otherwise, there are
-		// are sufficient entries, so update the current level to
-		// contain as many entries as possible while still leaving
-		// enough remaining entries required to reach the level.
-		numEntries := len(curLevelData) / txEntrySize
-		prevLevelMaxEntries := curLevelMaxEntries / 2
-		minPrevRequired := minEntriesToReachLevel(level - 1)
-		if numEntries < prevLevelMaxEntries+minPrevRequired {
-			lowestEmptyLevel = level
-			pendingUpdates[level] = nil
-		} else {
-			// This level can only be completely full or half full,
-			// so choose the appropriate offset to ensure enough
-			// entries remain to reach the level.
-			var offset int
-			if numEntries-curLevelMaxEntries >= minPrevRequired {
-				offset = curLevelMaxEntries * txEntrySize
-			} else {
-				offset = prevLevelMaxEntries * txEntrySize
-			}
-			pendingUpdates[level] = curLevelData[:offset]
-			curLevelData = curLevelData[offset:]
-		}
-
-		curLevelMaxEntries = prevLevelMaxEntries
-	}
-	pendingUpdates[0] = curLevelData
-	if len(curLevelData) == 0 {
-		lowestEmptyLevel = 0
-	}
-
-	// When the highest loaded level is empty, it's possible the level after
-	// it still has data and thus that data needs to be backfilled as well.
-	for len(pendingUpdates[highestLoadedLevel]) == 0 {
-		// When the next level is empty too, the is no data left to
-		// continue backfilling, so there is nothing left to do.
-		// Otherwise, populate the pending updates map with the newly
-		// loaded data and update the highest loaded level accordingly.
-		level := highestLoadedLevel + 1
-		curLevelKey := keyForLevel(addrKey, level)
-		levelData := bucket.Get(curLevelKey[:])
-		if len(levelData) == 0 {
-			break
-		}
-		pendingUpdates[level] = levelData
-		highestLoadedLevel = level
-
-		// At this point the highest level is not empty, but it might
-		// be half full.  When that is the case, move it up a level to
-		// simplify the code below which backfills all lower levels that
-		// are still empty.  This also means the current level will be
-		// empty, so the loop will perform another another iteration to
-		// potentially backfill this level with data from the next one.
-		curLevelMaxEntries := maxEntriesForLevel(level)
-		if len(levelData)/txEntrySize != curLevelMaxEntries {
-			pendingUpdates[level] = nil
-			pendingUpdates[level-1] = levelData
-			level--
-			curLevelMaxEntries /= 2
-		}
-
-		// Backfill all lower levels that are still empty by iteratively
-		// halfing the data until the lowest empty level is filled.
-		for level > lowestEmptyLevel {
-			offset := (curLevelMaxEntries / 2) * txEntrySize
-			pendingUpdates[level] = levelData[:offset]
-			levelData = levelData[offset:]
-			pendingUpdates[level-1] = levelData
-			level--
-			curLevelMaxEntries /= 2
-		}
-
-		// The lowest possible empty level is now the highest loaded
-		// level.
-		lowestEmptyLevel = highestLoadedLevel
-	}
-
-	// Apply the pending updates.
-	return applyPending()
-}
-
-// addrToKey converts known address types to an addrindex key.  An error is
-// returned for unsupported types.
-func addrToKey(addr util.Address) ([addrKeySize]byte, error) {
-	switch addr := addr.(type) {
-	case *util.AddressPubKeyHash:
-		var result [addrKeySize]byte
-		result[0] = addrKeyTypePubKeyHash
-		copy(result[1:], addr.Hash160()[:])
-		return result, nil
-
-	case *util.AddressScriptHash:
-		var result [addrKeySize]byte
-		result[0] = addrKeyTypeScriptHash
-		copy(result[1:], addr.Hash160()[:])
-		return result, nil
-	}
-
-	return [addrKeySize]byte{}, errUnsupportedAddressType
-}
-
-// AddrIndex implements a transaction by address index.  That is to say, it
-// supports querying all transactions that reference a given address because
-// they are either crediting or debiting the address.  The returned transactions
-// are ordered according to their order of appearance in the blockchain.  In
-// other words, first by block height and then by offset inside the block.
-//
-// In addition, support is provided for a memory-only index of unconfirmed
-// transactions such as those which are kept in the memory pool before inclusion
-// in a block.
-type AddrIndex struct {
-	// The following fields are set when the instance is created and can't
-	// be changed afterwards, so there is no need to protect them with a
-	// separate mutex.
-	db        database.DB
-	dagParams *dagconfig.Params
-
-	// The following fields are used to quickly link transactions and
-	// addresses that have not been included into a block yet when an
-	// address index is being maintained.  The are protected by the
-	// unconfirmedLock field.
-	//
-	// The txnsByAddr field is used to keep an index of all transactions
-	// which either create an output to a given address or spend from a
-	// previous output to it keyed by the address.
-	//
-	// The addrsByTx field is essentially the reverse and is used to
-	// keep an index of all addresses which a given transaction involves.
-	// This allows fairly efficient updates when transactions are removed
-	// once they are included into a block.
-	unconfirmedLock sync.RWMutex
-	txnsByAddr      map[[addrKeySize]byte]map[daghash.TxID]*util.Tx
-	addrsByTx       map[daghash.TxID]map[[addrKeySize]byte]struct{}
-}
-
-// Ensure the AddrIndex type implements the Indexer interface.
-var _ Indexer = (*AddrIndex)(nil)
-
-// Ensure the AddrIndex type implements the NeedsInputser interface.
-var _ NeedsInputser = (*AddrIndex)(nil)
-
-// NeedsInputs signals that the index requires the referenced inputs in order
-// to properly create the index.
-//
-// This implements the NeedsInputser interface.
-func (idx *AddrIndex) NeedsInputs() bool {
-	return true
-}
-
-// Init is only provided to satisfy the Indexer interface as there is nothing to
-// initialize for this index.
-//
-// This is part of the Indexer interface.
-func (idx *AddrIndex) Init(db database.DB, _ *blockdag.BlockDAG) error {
-	idx.db = db
-	return nil
-}
-
-// Key returns the database key to use for the index as a byte slice.
-//
-// This is part of the Indexer interface.
-func (idx *AddrIndex) Key() []byte {
-	return addrIndexKey
-}
-
-// Name returns the human-readable name of the index.
-//
-// This is part of the Indexer interface.
-func (idx *AddrIndex) Name() string {
-	return addrIndexName
-}
-
-// Create is invoked when the indexer manager determines the index needs
-// to be created for the first time.  It creates the bucket for the address
-// index.
-//
-// This is part of the Indexer interface.
-func (idx *AddrIndex) Create(dbTx database.Tx) error {
-	_, err := dbTx.Metadata().CreateBucket(addrIndexKey)
-	return err
-}
-
-// writeIndexData represents the address index data to be written for one block.
-// It consists of the address mapped to an ordered list of the transactions
-// that involve the address in block.  It is ordered so the transactions can be
-// stored in the order they appear in the block.
-type writeIndexData map[[addrKeySize]byte][]int
-
-// indexScriptPubKey extracts all standard addresses from the passed public key
-// script and maps each of them to the associated transaction using the passed
-// map.
-func (idx *AddrIndex) indexScriptPubKey(data writeIndexData, scriptPubKey []byte, txIdx int) {
-	// Nothing to index if the script is non-standard or otherwise doesn't
-	// contain any addresses.
-	_, addr, err := txscript.ExtractScriptPubKeyAddress(scriptPubKey,
-		idx.dagParams)
-	if err != nil || addr == nil {
-		return
-	}
-
-	addrKey, err := addrToKey(addr)
-	if err != nil {
-		// Ignore unsupported address types.
-		return
-	}
-
-	// Avoid inserting the transaction more than once.  Since the
-	// transactions are indexed serially any duplicates will be
-	// indexed in a row, so checking the most recent entry for the
-	// address is enough to detect duplicates.
-	indexedTxns := data[addrKey]
-	numTxns := len(indexedTxns)
-	if numTxns > 0 && indexedTxns[numTxns-1] == txIdx {
-		return
-	}
-	indexedTxns = append(indexedTxns, txIdx)
-	data[addrKey] = indexedTxns
-}
-
-// indexBlock extract all of the standard addresses from all of the transactions
-// in the passed block and maps each of them to the associated transaction using
-// the passed map.
-func (idx *AddrIndex) indexBlock(data writeIndexData, block *util.Block, dag *blockdag.BlockDAG) {
-	for txIdx, tx := range block.Transactions() {
-		// Coinbases do not reference any inputs.  Since the block is
-		// required to have already gone through full validation, it has
-		// already been proven on the first transaction in the block is
-		// a coinbase.
-		if txIdx > util.CoinbaseTransactionIndex {
-			for _, txIn := range tx.MsgTx().TxIn {
-				// The UTXO should always have the input since
-				// the index contract requires it, however, be
-				// safe and simply ignore any missing entries.
-				entry, ok := dag.GetUTXOEntry(txIn.PreviousOutpoint)
-				if !ok {
-					continue
-				}
-
-				idx.indexScriptPubKey(data, entry.ScriptPubKey(), txIdx)
-			}
-		}
-
-		for _, txOut := range tx.MsgTx().TxOut {
-			idx.indexScriptPubKey(data, txOut.ScriptPubKey, txIdx)
-		}
-	}
-}
-
-// ConnectBlock is invoked by the index manager when a new block has been
-// connected to the main chain.  This indexer adds a mapping for each address
-// the transactions in the block involve.
-//
-// This is part of the Indexer interface.
-func (idx *AddrIndex) ConnectBlock(dbTx database.Tx, block *util.Block, blockID uint64, dag *blockdag.BlockDAG,
-	_ blockdag.MultiBlockTxsAcceptanceData, _ blockdag.MultiBlockTxsAcceptanceData) error {
-
-	// The offset and length of the transactions within the serialized
-	// block.
-	txLocs, err := block.TxLoc()
-	if err != nil {
-		return err
-	}
-
-	// Build all of the address to transaction mappings in a local map.
-	addrsToTxns := make(writeIndexData)
-	idx.indexBlock(addrsToTxns, block, dag)
-
-	// Add all of the index entries for each address.
-	addrIdxBucket := dbTx.Metadata().Bucket(addrIndexKey)
-	for addrKey, txIdxs := range addrsToTxns {
-		for _, txIdx := range txIdxs {
-			err := dbPutAddrIndexEntry(addrIdxBucket, addrKey,
-				blockID, txLocs[txIdx])
-			if err != nil {
-				return err
-			}
-		}
-	}
-
-	return nil
-}
-
-// DisconnectBlock is invoked by the index manager when a block has been
-// disconnected from the main chain.  This indexer removes the address mappings
-// each transaction in the block involve.
-//
-// This is part of the Indexer interface.
-func (idx *AddrIndex) DisconnectBlock(dbTx database.Tx, block *util.Block, dag *blockdag.BlockDAG) error {
-	// Build all of the address to transaction mappings in a local map.
-	addrsToTxns := make(writeIndexData)
-	idx.indexBlock(addrsToTxns, block, dag)
-
-	// Remove all of the index entries for each address.
-	bucket := dbTx.Metadata().Bucket(addrIndexKey)
-	for addrKey, txIdxs := range addrsToTxns {
-		err := dbRemoveAddrIndexEntries(bucket, addrKey, len(txIdxs))
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// TxRegionsForAddress returns a slice of block regions which identify each
-// transaction that involves the passed address according to the specified
-// number to skip, number requested, and whether or not the results should be
-// reversed.  It also returns the number actually skipped since it could be less
-// in the case where there are not enough entries.
-//
-// NOTE: These results only include transactions confirmed in blocks.  See the
-// UnconfirmedTxnsForAddress method for obtaining unconfirmed transactions
-// that involve a given address.
-//
-// This function is safe for concurrent access.
-func (idx *AddrIndex) TxRegionsForAddress(dbTx database.Tx, addr util.Address, numToSkip, numRequested uint32, reverse bool) ([]database.BlockRegion, uint32, error) {
-	addrKey, err := addrToKey(addr)
-	if err != nil {
-		return nil, 0, err
-	}
-
-	var regions []database.BlockRegion
-	var skipped uint32
-	err = idx.db.View(func(dbTx database.Tx) error {
-		// Create closure to lookup the block hash given the ID using
-		// the database transaction.
-		fetchBlockHash := func(id []byte) (*daghash.Hash, error) {
-			// Deserialize and populate the result.
-			return blockdag.DBFetchBlockHashBySerializedID(dbTx, id)
-		}
-
-		var err error
-		addrIdxBucket := dbTx.Metadata().Bucket(addrIndexKey)
-		regions, skipped, err = dbFetchAddrIndexEntries(addrIdxBucket,
-			addrKey, numToSkip, numRequested, reverse,
-			fetchBlockHash)
-		return err
-	})
-
-	return regions, skipped, err
-}
-
-// indexUnconfirmedAddresses modifies the unconfirmed (memory-only) address
-// index to include mappings for the addresses encoded by the passed public key
-// script to the transaction.
-//
-// This function is safe for concurrent access.
-func (idx *AddrIndex) indexUnconfirmedAddresses(scriptPubKey []byte, tx *util.Tx) {
-	// The error is ignored here since the only reason it can fail is if the
-	// script fails to parse and it was already validated before being
-	// admitted to the mempool.
-	_, addr, _ := txscript.ExtractScriptPubKeyAddress(scriptPubKey,
-		idx.dagParams)
-	// Ignore unsupported address types.
-	addrKey, err := addrToKey(addr)
-	if err != nil {
-		return
-	}
-
-	// Add a mapping from the address to the transaction.
-	idx.unconfirmedLock.Lock()
-	addrIndexEntry := idx.txnsByAddr[addrKey]
-	if addrIndexEntry == nil {
-		addrIndexEntry = make(map[daghash.TxID]*util.Tx)
-		idx.txnsByAddr[addrKey] = addrIndexEntry
-	}
-	addrIndexEntry[*tx.ID()] = tx
-
-	// Add a mapping from the transaction to the address.
-	addrsByTxEntry := idx.addrsByTx[*tx.ID()]
-	if addrsByTxEntry == nil {
-		addrsByTxEntry = make(map[[addrKeySize]byte]struct{})
-		idx.addrsByTx[*tx.ID()] = addrsByTxEntry
-	}
-	addrsByTxEntry[addrKey] = struct{}{}
-	idx.unconfirmedLock.Unlock()
-}
-
-// AddUnconfirmedTx adds all addresses related to the transaction to the
-// unconfirmed (memory-only) address index.
-//
-// NOTE: This transaction MUST have already been validated by the memory pool
-// before calling this function with it and have all of the inputs available in
-// the provided utxo view.  Failure to do so could result in some or all
-// addresses not being indexed.
-//
-// This function is safe for concurrent access.
-func (idx *AddrIndex) AddUnconfirmedTx(tx *util.Tx, utxoSet blockdag.UTXOSet) {
-	// Index addresses of all referenced previous transaction outputs.
-	//
-	// The existence checks are elided since this is only called after the
-	// transaction has already been validated and thus all inputs are
-	// already known to exist.
-	for _, txIn := range tx.MsgTx().TxIn {
-		entry, ok := utxoSet.Get(txIn.PreviousOutpoint)
-		if !ok {
-			// Ignore missing entries.  This should never happen
-			// in practice since the function comments specifically
-			// call out all inputs must be available.
-			continue
-		}
-		idx.indexUnconfirmedAddresses(entry.ScriptPubKey(), tx)
-	}
-
-	// Index addresses of all created outputs.
-	for _, txOut := range tx.MsgTx().TxOut {
-		idx.indexUnconfirmedAddresses(txOut.ScriptPubKey, tx)
-	}
-}
-
-// RemoveUnconfirmedTx removes the passed transaction from the unconfirmed
-// (memory-only) address index.
-//
-// This function is safe for concurrent access.
-func (idx *AddrIndex) RemoveUnconfirmedTx(txID *daghash.TxID) {
-	idx.unconfirmedLock.Lock()
-	defer idx.unconfirmedLock.Unlock()
-
-	// Remove all address references to the transaction from the address
-	// index and remove the entry for the address altogether if it no longer
-	// references any transactions.
-	for addrKey := range idx.addrsByTx[*txID] {
-		delete(idx.txnsByAddr[addrKey], *txID)
-		if len(idx.txnsByAddr[addrKey]) == 0 {
-			delete(idx.txnsByAddr, addrKey)
-		}
-	}
-
-	// Remove the entry from the transaction to address lookup map as well.
-	delete(idx.addrsByTx, *txID)
-}
-
-// UnconfirmedTxnsForAddress returns all transactions currently in the
-// unconfirmed (memory-only) address index that involve the passed address.
-// Unsupported address types are ignored and will result in no results.
-//
-// This function is safe for concurrent access.
-func (idx *AddrIndex) UnconfirmedTxnsForAddress(addr util.Address) []*util.Tx {
-	// Ignore unsupported address types.
-	addrKey, err := addrToKey(addr)
-	if err != nil {
-		return nil
-	}
-
-	// Protect concurrent access.
-	idx.unconfirmedLock.RLock()
-	defer idx.unconfirmedLock.RUnlock()
-
-	// Return a new slice with the results if there are any.  This ensures
-	// safe concurrency.
-	if txns, exists := idx.txnsByAddr[addrKey]; exists {
-		addressTxns := make([]*util.Tx, 0, len(txns))
-		for _, tx := range txns {
-			addressTxns = append(addressTxns, tx)
-		}
-		return addressTxns
-	}
-
-	return nil
-}
-
-// Recover is invoked when the indexer wasn't turned on for several blocks
-// and the indexer needs to close the gaps.
-//
-// This is part of the Indexer interface.
-func (idx *AddrIndex) Recover(dbTx database.Tx, currentBlockID, lastKnownBlockID uint64) error {
-	return fmt.Errorf("addrindex was turned off for %d blocks and can't be recovered."+
-		" To resume working drop the addrindex with --dropaddrindex", lastKnownBlockID-currentBlockID)
-}
-
-// NewAddrIndex returns a new instance of an indexer that is used to create a
-// mapping of all addresses in the blockchain to the respective transactions
-// that involve them.
-//
-// It implements the Indexer interface which plugs into the IndexManager that in
-// turn is used by the blockchain package.  This allows the index to be
-// seamlessly maintained along with the chain.
-func NewAddrIndex(dagParams *dagconfig.Params) *AddrIndex {
-	return &AddrIndex{
-		dagParams:  dagParams,
-		txnsByAddr: make(map[[addrKeySize]byte]map[daghash.TxID]*util.Tx),
-		addrsByTx:  make(map[daghash.TxID]map[[addrKeySize]byte]struct{}),
-	}
-}
-
-// DropAddrIndex drops the address index from the provided database if it
-// exists.
-func DropAddrIndex(db database.DB, interrupt <-chan struct{}) error {
-	return dropIndex(db, addrIndexKey, addrIndexName, interrupt)
-}

blockdag/indexers/addrindex_test.go

@@ -1,276 +0,0 @@
-// Copyright (c) 2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package indexers
-
-import (
-	"bytes"
-	"fmt"
-	"testing"
-
-	"github.com/daglabs/btcd/wire"
-)
-
-// addrIndexBucket provides a mock address index database bucket by implementing
-// the internalBucket interface.
-type addrIndexBucket struct {
-	levels map[[levelKeySize]byte][]byte
-}
-
-// Clone returns a deep copy of the mock address index bucket.
-func (b *addrIndexBucket) Clone() *addrIndexBucket {
-	levels := make(map[[levelKeySize]byte][]byte)
-	for k, v := range b.levels {
-		vCopy := make([]byte, len(v))
-		copy(vCopy, v)
-		levels[k] = vCopy
-	}
-	return &addrIndexBucket{levels: levels}
-}
-
-// Get returns the value associated with the key from the mock address index
-// bucket.
-//
-// This is part of the internalBucket interface.
-func (b *addrIndexBucket) Get(key []byte) []byte {
-	var levelKey [levelKeySize]byte
-	copy(levelKey[:], key)
-	return b.levels[levelKey]
-}
-
-// Put stores the provided key/value pair to the mock address index bucket.
-//
-// This is part of the internalBucket interface.
-func (b *addrIndexBucket) Put(key []byte, value []byte) error {
-	var levelKey [levelKeySize]byte
-	copy(levelKey[:], key)
-	b.levels[levelKey] = value
-	return nil
-}
-
-// Delete removes the provided key from the mock address index bucket.
-//
-// This is part of the internalBucket interface.
-func (b *addrIndexBucket) Delete(key []byte) error {
-	var levelKey [levelKeySize]byte
-	copy(levelKey[:], key)
-	delete(b.levels, levelKey)
-	return nil
-}
-
-// printLevels returns a string with a visual representation of the provided
-// address key taking into account the max size of each level.  It is useful
-// when creating and debugging test cases.
-func (b *addrIndexBucket) printLevels(addrKey [addrKeySize]byte) string {
-	highestLevel := uint8(0)
-	for k := range b.levels {
-		if !bytes.Equal(k[:levelOffset], addrKey[:]) {
-			continue
-		}
-		level := uint8(k[levelOffset])
-		if level > highestLevel {
-			highestLevel = level
-		}
-	}
-
-	var levelBuf bytes.Buffer
-	_, _ = levelBuf.WriteString("\n")
-	maxEntries := level0MaxEntries
-	for level := uint8(0); level <= highestLevel; level++ {
-		data := b.levels[keyForLevel(addrKey, level)]
-		numEntries := len(data) / txEntrySize
-		for i := 0; i < numEntries; i++ {
-			start := i * txEntrySize
-			num := byteOrder.Uint32(data[start:])
-			_, _ = levelBuf.WriteString(fmt.Sprintf("%02d ", num))
-		}
-		for i := numEntries; i < maxEntries; i++ {
-			_, _ = levelBuf.WriteString("_  ")
-		}
-		_, _ = levelBuf.WriteString("\n")
-		maxEntries *= 2
-	}
-
-	return levelBuf.String()
-}
-
-// sanityCheck ensures that all data stored in the bucket for the given address
-// adheres to the level-based rules described by the address index
-// documentation.
-func (b *addrIndexBucket) sanityCheck(addrKey [addrKeySize]byte, expectedTotal int) error {
-	// Find the highest level for the key.
-	highestLevel := uint8(0)
-	for k := range b.levels {
-		if !bytes.Equal(k[:levelOffset], addrKey[:]) {
-			continue
-		}
-		level := uint8(k[levelOffset])
-		if level > highestLevel {
-			highestLevel = level
-		}
-	}
-
-	// Ensure the expected total number of entries are present and that
-	// all levels adhere to the rules described in the address index
-	// documentation.
-	var totalEntries int
-	maxEntries := level0MaxEntries
-	for level := uint8(0); level <= highestLevel; level++ {
-		// Level 0 can'have more entries than the max allowed if the
-		// levels after it have data and it can't be empty.  All other
-		// levels must either be half full or full.
-		data := b.levels[keyForLevel(addrKey, level)]
-		numEntries := len(data) / txEntrySize
-		totalEntries += numEntries
-		if level == 0 {
-			if (highestLevel != 0 && numEntries == 0) ||
-				numEntries > maxEntries {
-
-				return fmt.Errorf("level %d has %d entries",
-					level, numEntries)
-			}
-		} else if numEntries != maxEntries && numEntries != maxEntries/2 {
-			return fmt.Errorf("level %d has %d entries", level,
-				numEntries)
-		}
-		maxEntries *= 2
-	}
-	if totalEntries != expectedTotal {
-		return fmt.Errorf("expected %d entries - got %d", expectedTotal,
-			totalEntries)
-	}
-
-	// Ensure all of the numbers are in order starting from the highest
-	// level moving to the lowest level.
-	expectedNum := uint32(0)
-	for level := highestLevel + 1; level > 0; level-- {
-		data := b.levels[keyForLevel(addrKey, level)]
-		numEntries := len(data) / txEntrySize
-		for i := 0; i < numEntries; i++ {
-			start := i * txEntrySize
-			num := byteOrder.Uint32(data[start:])
-			if num != expectedNum {
-				return fmt.Errorf("level %d offset %d does "+
-					"not contain the expected number of "+
-					"%d - got %d", level, i, num,
-					expectedNum)
-			}
-			expectedNum++
-		}
-	}
-
-	return nil
-}
-
-// TestAddrIndexLevels ensures that adding and deleting entries to the address
-// index creates multiple levels as described by the address index
-// documentation.
-func TestAddrIndexLevels(t *testing.T) {
-	t.Parallel()
-
-	tests := []struct {
-		name        string
-		key         [addrKeySize]byte
-		numInsert   int
-		printLevels bool // Set to help debug a specific test.
-	}{
-		{
-			name:      "level 0 not full",
-			numInsert: level0MaxEntries - 1,
-		},
-		{
-			name:      "level 1 half",
-			numInsert: level0MaxEntries + 1,
-		},
-		{
-			name:      "level 1 full",
-			numInsert: level0MaxEntries*2 + 1,
-		},
-		{
-			name:      "level 2 half, level 1 half",
-			numInsert: level0MaxEntries*3 + 1,
-		},
-		{
-			name:      "level 2 half, level 1 full",
-			numInsert: level0MaxEntries*4 + 1,
-		},
-		{
-			name:      "level 2 full, level 1 half",
-			numInsert: level0MaxEntries*5 + 1,
-		},
-		{
-			name:      "level 2 full, level 1 full",
-			numInsert: level0MaxEntries*6 + 1,
-		},
-		{
-			name:      "level 3 half, level 2 half, level 1 half",
-			numInsert: level0MaxEntries*7 + 1,
-		},
-		{
-			name:      "level 3 full, level 2 half, level 1 full",
-			numInsert: level0MaxEntries*12 + 1,
-		},
-	}
-
-nextTest:
-	for testNum, test := range tests {
-		// Insert entries in order.
-		populatedBucket := &addrIndexBucket{
-			levels: make(map[[levelKeySize]byte][]byte),
-		}
-		for i := 0; i < test.numInsert; i++ {
-			txLoc := wire.TxLoc{TxStart: i * 2}
-			err := dbPutAddrIndexEntry(populatedBucket, test.key,
-				uint64(i), txLoc)
-			if err != nil {
-				t.Errorf("dbPutAddrIndexEntry #%d (%s) - "+
-					"unexpected error: %v", testNum,
-					test.name, err)
-				continue nextTest
-			}
-		}
-		if test.printLevels {
-			t.Log(populatedBucket.printLevels(test.key))
-		}
-
-		// Delete entries from the populated bucket until all entries
-		// have been deleted.  The bucket is reset to the fully
-		// populated bucket on each iteration so every combination is
-		// tested.  Notice the upper limit purposes exceeds the number
-		// of entries to ensure attempting to delete more entries than
-		// there are works correctly.
-		for numDelete := 0; numDelete <= test.numInsert+1; numDelete++ {
-			// Clone populated bucket to run each delete against.
-			bucket := populatedBucket.Clone()
-
-			// Remove the number of entries for this iteration.
-			err := dbRemoveAddrIndexEntries(bucket, test.key,
-				numDelete)
-			if err != nil {
-				if numDelete <= test.numInsert {
-					t.Errorf("dbRemoveAddrIndexEntries (%s) "+
-						" delete %d - unexpected error: "+
-						"%v", test.name, numDelete, err)
-					continue nextTest
-				}
-			}
-			if test.printLevels {
-				t.Log(bucket.printLevels(test.key))
-			}
-
-			// Sanity check the levels to ensure the adhere to all
-			// rules.
-			numExpected := test.numInsert
-			if numDelete <= test.numInsert {
-				numExpected -= numDelete
-			}
-			err = bucket.sanityCheck(test.key, numExpected)
-			if err != nil {
-				t.Errorf("sanity check fail (%s) delete %d: %v",
-					test.name, numDelete, err)
-				continue nextTest
-			}
-		}
-	}
-}

blockdag/indexers/cfindex.go

@@ -1,367 +0,0 @@
-// Copyright (c) 2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package indexers
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/util/gcs"
-	"github.com/daglabs/btcd/util/gcs/builder"
-	"github.com/daglabs/btcd/wire"
-)
-
-const (
-	// cfIndexName is the human-readable name for the index.
-	cfIndexName = "committed filter index"
-)
-
-// Committed filters come in two flavours: basic and extended. They are
-// generated and dropped in pairs, and both are indexed by a block's hash.
-// Besides holding different content, they also live in different buckets.
-var (
-	// cfIndexParentBucketKey is the name of the parent bucket used to house
-	// the index. The rest of the buckets live below this bucket.
-	cfIndexParentBucketKey = []byte("cfindexparentbucket")
-
-	// cfIndexKeys is an array of db bucket names used to house indexes of
-	// block hashes to cfilters.
-	cfIndexKeys = [][]byte{
-		[]byte("cf0byhashidx"),
-		[]byte("cf1byhashidx"),
-	}
-
-	// cfHeaderKeys is an array of db bucket names used to house indexes of
-	// block hashes to cf headers.
-	cfHeaderKeys = [][]byte{
-		[]byte("cf0headerbyhashidx"),
-		[]byte("cf1headerbyhashidx"),
-	}
-
-	// cfHashKeys is an array of db bucket names used to house indexes of
-	// block hashes to cf hashes.
-	cfHashKeys = [][]byte{
-		[]byte("cf0hashbyhashidx"),
-		[]byte("cf1hashbyhashidx"),
-	}
-
-	maxFilterType = uint8(len(cfHeaderKeys) - 1)
-)
-
-// dbFetchFilterIdxEntry retrieves a data blob from the filter index database.
-// An entry's absence is not considered an error.
-func dbFetchFilterIdxEntry(dbTx database.Tx, key []byte, h *daghash.Hash) ([]byte, error) {
-	idx := dbTx.Metadata().Bucket(cfIndexParentBucketKey).Bucket(key)
-	return idx.Get(h[:]), nil
-}
-
-// dbStoreFilterIdxEntry stores a data blob in the filter index database.
-func dbStoreFilterIdxEntry(dbTx database.Tx, key []byte, h *daghash.Hash, f []byte) error {
-	idx := dbTx.Metadata().Bucket(cfIndexParentBucketKey).Bucket(key)
-	return idx.Put(h[:], f)
-}
-
-// dbDeleteFilterIdxEntry deletes a data blob from the filter index database.
-func dbDeleteFilterIdxEntry(dbTx database.Tx, key []byte, h *daghash.Hash) error {
-	idx := dbTx.Metadata().Bucket(cfIndexParentBucketKey).Bucket(key)
-	return idx.Delete(h[:])
-}
-
-// CfIndex implements a committed filter (cf) by hash index.
-type CfIndex struct {
-	db        database.DB
-	dagParams *dagconfig.Params
-}
-
-// Ensure the CfIndex type implements the Indexer interface.
-var _ Indexer = (*CfIndex)(nil)
-
-// Init initializes the hash-based cf index. This is part of the Indexer
-// interface.
-func (idx *CfIndex) Init(db database.DB, _ *blockdag.BlockDAG) error {
-	idx.db = db
-	return nil
-}
-
-// Key returns the database key to use for the index as a byte slice. This is
-// part of the Indexer interface.
-func (idx *CfIndex) Key() []byte {
-	return cfIndexParentBucketKey
-}
-
-// Name returns the human-readable name of the index. This is part of the
-// Indexer interface.
-func (idx *CfIndex) Name() string {
-	return cfIndexName
-}
-
-// Create is invoked when the indexer manager determines the index needs to
-// be created for the first time. It creates buckets for the two hash-based cf
-// indexes (simple, extended).
-func (idx *CfIndex) Create(dbTx database.Tx) error {
-	meta := dbTx.Metadata()
-
-	cfIndexParentBucket, err := meta.CreateBucket(cfIndexParentBucketKey)
-	if err != nil {
-		return err
-	}
-
-	for _, bucketName := range cfIndexKeys {
-		_, err = cfIndexParentBucket.CreateBucket(bucketName)
-		if err != nil {
-			return err
-		}
-	}
-
-	for _, bucketName := range cfHeaderKeys {
-		_, err = cfIndexParentBucket.CreateBucket(bucketName)
-		if err != nil {
-			return err
-		}
-	}
-
-	for _, bucketName := range cfHashKeys {
-		_, err = cfIndexParentBucket.CreateBucket(bucketName)
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// storeFilter stores a given filter, and performs the steps needed to
-// generate the filter's header.
-func storeFilter(dbTx database.Tx, block *util.Block, f *gcs.Filter,
-	filterType wire.FilterType) error {
-	if uint8(filterType) > maxFilterType {
-		return errors.New("unsupported filter type")
-	}
-
-	// Figure out which buckets to use.
-	fkey := cfIndexKeys[filterType]
-	hkey := cfHeaderKeys[filterType]
-	hashkey := cfHashKeys[filterType]
-
-	// Start by storing the filter.
-	h := block.Hash()
-	filterBytes, err := f.NBytes()
-	if err != nil {
-		return err
-	}
-	err = dbStoreFilterIdxEntry(dbTx, fkey, h, filterBytes)
-	if err != nil {
-		return err
-	}
-
-	// Next store the filter hash.
-	filterHash, err := builder.GetFilterHash(f)
-	if err != nil {
-		return err
-	}
-	err = dbStoreFilterIdxEntry(dbTx, hashkey, h, filterHash[:])
-	if err != nil {
-		return err
-	}
-
-	// Then fetch the previous block's filter header.
-	var prevHeader *daghash.Hash
-	header := block.MsgBlock().Header
-	if header.IsGenesis() {
-		prevHeader = &daghash.ZeroHash
-	} else {
-		// TODO(Evgeny): Current implementation of GCS filter inherited from chain
-		// (single parent) and must be ported to DAG (multiple parents)
-		var parentHash *daghash.Hash
-		if header.NumParentBlocks() != 0 {
-			parentHash = header.ParentHashes[0]
-		}
-		prevFilterHashBytes, err := dbFetchFilterIdxEntry(dbTx, hkey, parentHash)
-		if err != nil {
-			return err
-		}
-
-		// Construct the new block's filter header, and store it.
-		prevHeader, err = daghash.NewHash(prevFilterHashBytes)
-		if err != nil {
-			return err
-		}
-	}
-
-	fh, err := builder.MakeHeaderForFilter(f, prevHeader)
-	if err != nil {
-		return err
-	}
-	return dbStoreFilterIdxEntry(dbTx, hkey, h, fh[:])
-}
-
-// ConnectBlock is invoked by the index manager when a new block has been
-// connected to the main chain. This indexer adds a hash-to-cf mapping for
-// every passed block. This is part of the Indexer interface.
-func (idx *CfIndex) ConnectBlock(dbTx database.Tx, block *util.Block, _ uint64,
-	_ *blockdag.BlockDAG, _ blockdag.MultiBlockTxsAcceptanceData, _ blockdag.MultiBlockTxsAcceptanceData) error {
-
-	f, err := builder.BuildBasicFilter(block.MsgBlock())
-	if err != nil {
-		return err
-	}
-
-	err = storeFilter(dbTx, block, f, wire.GCSFilterRegular)
-	if err != nil {
-		return err
-	}
-
-	f, err = builder.BuildExtFilter(block.MsgBlock())
-	if err != nil {
-		return err
-	}
-
-	return storeFilter(dbTx, block, f, wire.GCSFilterExtended)
-}
-
-// DisconnectBlock is invoked by the index manager when a block has been
-// disconnected from the main chain.  This indexer removes the hash-to-cf
-// mapping for every passed block. This is part of the Indexer interface.
-func (idx *CfIndex) DisconnectBlock(dbTx database.Tx, block *util.Block,
-	_ *blockdag.BlockDAG) error {
-
-	for _, key := range cfIndexKeys {
-		err := dbDeleteFilterIdxEntry(dbTx, key, block.Hash())
-		if err != nil {
-			return err
-		}
-	}
-
-	for _, key := range cfHeaderKeys {
-		err := dbDeleteFilterIdxEntry(dbTx, key, block.Hash())
-		if err != nil {
-			return err
-		}
-	}
-
-	for _, key := range cfHashKeys {
-		err := dbDeleteFilterIdxEntry(dbTx, key, block.Hash())
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// entryByBlockHash fetches a filter index entry of a particular type
-// (eg. filter, filter header, etc) for a filter type and block hash.
-func (idx *CfIndex) entryByBlockHash(filterTypeKeys [][]byte,
-	filterType wire.FilterType, h *daghash.Hash) ([]byte, error) {
-
-	if uint8(filterType) > maxFilterType {
-		return nil, errors.New("unsupported filter type")
-	}
-	key := filterTypeKeys[filterType]
-
-	var entry []byte
-	err := idx.db.View(func(dbTx database.Tx) error {
-		var err error
-		entry, err = dbFetchFilterIdxEntry(dbTx, key, h)
-		return err
-	})
-	return entry, err
-}
-
-// entriesByBlockHashes batch fetches a filter index entry of a particular type
-// (eg. filter, filter header, etc) for a filter type and slice of block hashes.
-func (idx *CfIndex) entriesByBlockHashes(filterTypeKeys [][]byte,
-	filterType wire.FilterType, blockHashes []*daghash.Hash) ([][]byte, error) {
-
-	if uint8(filterType) > maxFilterType {
-		return nil, errors.New("unsupported filter type")
-	}
-	key := filterTypeKeys[filterType]
-
-	entries := make([][]byte, 0, len(blockHashes))
-	err := idx.db.View(func(dbTx database.Tx) error {
-		for _, blockHash := range blockHashes {
-			entry, err := dbFetchFilterIdxEntry(dbTx, key, blockHash)
-			if err != nil {
-				return err
-			}
-			entries = append(entries, entry)
-		}
-		return nil
-	})
-	return entries, err
-}
-
-// FilterByBlockHash returns the serialized contents of a block's basic or
-// extended committed filter.
-func (idx *CfIndex) FilterByBlockHash(h *daghash.Hash,
-	filterType wire.FilterType) ([]byte, error) {
-	return idx.entryByBlockHash(cfIndexKeys, filterType, h)
-}
-
-// FiltersByBlockHashes returns the serialized contents of a block's basic or
-// extended committed filter for a set of blocks by hash.
-func (idx *CfIndex) FiltersByBlockHashes(blockHashes []*daghash.Hash,
-	filterType wire.FilterType) ([][]byte, error) {
-	return idx.entriesByBlockHashes(cfIndexKeys, filterType, blockHashes)
-}
-
-// FilterHeaderByBlockHash returns the serialized contents of a block's basic
-// or extended committed filter header.
-func (idx *CfIndex) FilterHeaderByBlockHash(h *daghash.Hash,
-	filterType wire.FilterType) ([]byte, error) {
-	return idx.entryByBlockHash(cfHeaderKeys, filterType, h)
-}
-
-// FilterHeadersByBlockHashes returns the serialized contents of a block's basic
-// or extended committed filter header for a set of blocks by hash.
-func (idx *CfIndex) FilterHeadersByBlockHashes(blockHashes []*daghash.Hash,
-	filterType wire.FilterType) ([][]byte, error) {
-	return idx.entriesByBlockHashes(cfHeaderKeys, filterType, blockHashes)
-}
-
-// FilterHashByBlockHash returns the serialized contents of a block's basic
-// or extended committed filter hash.
-func (idx *CfIndex) FilterHashByBlockHash(h *daghash.Hash,
-	filterType wire.FilterType) ([]byte, error) {
-	return idx.entryByBlockHash(cfHashKeys, filterType, h)
-}
-
-// FilterHashesByBlockHashes returns the serialized contents of a block's basic
-// or extended committed filter hash for a set of blocks by hash.
-func (idx *CfIndex) FilterHashesByBlockHashes(blockHashes []*daghash.Hash,
-	filterType wire.FilterType) ([][]byte, error) {
-	return idx.entriesByBlockHashes(cfHashKeys, filterType, blockHashes)
-}
-
-// Recover is invoked when the indexer wasn't turned on for several blocks
-// and the indexer needs to close the gaps.
-//
-// This is part of the Indexer interface.
-func (idx *CfIndex) Recover(dbTx database.Tx, currentBlockID, lastKnownBlockID uint64) error {
-	return fmt.Errorf("cfindex was turned off for %d blocks and can't be recovered."+
-		" To resume working drop the cfindex with --dropcfindex", lastKnownBlockID-currentBlockID)
-}
-
-// NewCfIndex returns a new instance of an indexer that is used to create a
-// mapping of the hashes of all blocks in the blockchain to their respective
-// committed filters.
-//
-// It implements the Indexer interface which plugs into the IndexManager that
-// in turn is used by the blockchain package. This allows the index to be
-// seamlessly maintained along with the chain.
-func NewCfIndex(dagParams *dagconfig.Params) *CfIndex {
-	return &CfIndex{dagParams: dagParams}
-}
-
-// DropCfIndex drops the CF index from the provided database if exists.
-func DropCfIndex(db database.DB, interrupt <-chan struct{}) error {
-	return dropIndex(db, cfIndexParentBucketKey, cfIndexName, interrupt)
-}

blockdag/indexers/common.go

@@ -1,113 +0,0 @@
-// Copyright (c) 2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-/*
-Package indexers implements optional block chain indexes.
-*/
-package indexers
-
-import (
-	"encoding/binary"
-	"errors"
-
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-)
-
-var (
-	// byteOrder is the preferred byte order used for serializing numeric
-	// fields for storage in the database.
-	byteOrder = binary.LittleEndian
-
-	// errInterruptRequested indicates that an operation was cancelled due
-	// to a user-requested interrupt.
-	errInterruptRequested = errors.New("interrupt requested")
-)
-
-// NeedsInputser provides a generic interface for an indexer to specify the it
-// requires the ability to look up inputs for a transaction.
-type NeedsInputser interface {
-	NeedsInputs() bool
-}
-
-// Indexer provides a generic interface for an indexer that is managed by an
-// index manager such as the Manager type provided by this package.
-type Indexer interface {
-	// Key returns the key of the index as a byte slice.
-	Key() []byte
-
-	// Name returns the human-readable name of the index.
-	Name() string
-
-	// Create is invoked when the indexer manager determines the index needs
-	// to be created for the first time.
-	Create(dbTx database.Tx) error
-
-	// Init is invoked when the index manager is first initializing the
-	// index.  This differs from the Create method in that it is called on
-	// every load, including the case the index was just created.
-	Init(db database.DB, dag *blockdag.BlockDAG) error
-
-	// ConnectBlock is invoked when the index manager is notified that a new
-	// block has been connected to the DAG.
-	ConnectBlock(dbTx database.Tx,
-		block *util.Block,
-		blockID uint64,
-		dag *blockdag.BlockDAG,
-		acceptedTxsData blockdag.MultiBlockTxsAcceptanceData,
-		virtualTxsAcceptanceData blockdag.MultiBlockTxsAcceptanceData) error
-
-	// Recover is invoked when the indexer wasn't turned on for several blocks
-	// and the indexer needs to close the gaps.
-	Recover(dbTx database.Tx, currentBlockID, lastKnownBlockID uint64) error
-}
-
-// AssertError identifies an error that indicates an internal code consistency
-// issue and should be treated as a critical and unrecoverable error.
-type AssertError string
-
-// Error returns the assertion error as a huma-readable string and satisfies
-// the error interface.
-func (e AssertError) Error() string {
-	return "assertion failed: " + string(e)
-}
-
-// errDeserialize signifies that a problem was encountered when deserializing
-// data.
-type errDeserialize string
-
-// Error implements the error interface.
-func (e errDeserialize) Error() string {
-	return string(e)
-}
-
-// isDeserializeErr returns whether or not the passed error is an errDeserialize
-// error.
-func isDeserializeErr(err error) bool {
-	_, ok := err.(errDeserialize)
-	return ok
-}
-
-// internalBucket is an abstraction over a database bucket.  It is used to make
-// the code easier to test since it allows mock objects in the tests to only
-// implement these functions instead of everything a database.Bucket supports.
-type internalBucket interface {
-	Get(key []byte) []byte
-	Put(key []byte, value []byte) error
-	Delete(key []byte) error
-}
-
-// interruptRequested returns true when the provided channel has been closed.
-// This simplifies early shutdown slightly since the caller can just use an if
-// statement instead of a select.
-func interruptRequested(interrupted <-chan struct{}) bool {
-	select {
-	case <-interrupted:
-		return true
-	default:
-	}
-
-	return false
-}

blockdag/indexers/manager.go

@@ -1,389 +0,0 @@
-// Copyright (c) 2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package indexers
-
-import (
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-var (
-	// indexTipsBucketName is the name of the db bucket used to house the
-	// current tip of each index.
-	indexTipsBucketName = []byte("idxtips")
-
-	indexCurrentBlockIDBucketName = []byte("idxcurrentblockid")
-)
-
-// Manager defines an index manager that manages multiple optional indexes and
-// implements the blockchain.IndexManager interface so it can be seamlessly
-// plugged into normal chain processing.
-type Manager struct {
-	db             database.DB
-	enabledIndexes []Indexer
-}
-
-// Ensure the Manager type implements the blockchain.IndexManager interface.
-var _ blockdag.IndexManager = (*Manager)(nil)
-
-// indexDropKey returns the key for an index which indicates it is in the
-// process of being dropped.
-func indexDropKey(idxKey []byte) []byte {
-	dropKey := make([]byte, len(idxKey)+1)
-	dropKey[0] = 'd'
-	copy(dropKey[1:], idxKey)
-	return dropKey
-}
-
-// maybeFinishDrops determines if each of the enabled indexes are in the middle
-// of being dropped and finishes dropping them when the are.  This is necessary
-// because dropping and index has to be done in several atomic steps rather than
-// one big atomic step due to the massive number of entries.
-func (m *Manager) maybeFinishDrops(interrupt <-chan struct{}) error {
-	indexNeedsDrop := make([]bool, len(m.enabledIndexes))
-	err := m.db.View(func(dbTx database.Tx) error {
-		// None of the indexes needs to be dropped if the index tips
-		// bucket hasn't been created yet.
-		indexesBucket := dbTx.Metadata().Bucket(indexTipsBucketName)
-		if indexesBucket == nil {
-			return nil
-		}
-
-		// Mark the indexer as requiring a drop if one is already in
-		// progress.
-		for i, indexer := range m.enabledIndexes {
-			dropKey := indexDropKey(indexer.Key())
-			if indexesBucket.Get(dropKey) != nil {
-				indexNeedsDrop[i] = true
-			}
-		}
-
-		return nil
-	})
-	if err != nil {
-		return err
-	}
-
-	if interruptRequested(interrupt) {
-		return errInterruptRequested
-	}
-
-	// Finish dropping any of the enabled indexes that are already in the
-	// middle of being dropped.
-	for i, indexer := range m.enabledIndexes {
-		if !indexNeedsDrop[i] {
-			continue
-		}
-
-		log.Infof("Resuming %s drop", indexer.Name())
-		err := dropIndex(m.db, indexer.Key(), indexer.Name(), interrupt)
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// maybeCreateIndexes determines if each of the enabled indexes have already
-// been created and creates them if not.
-func (m *Manager) maybeCreateIndexes(dbTx database.Tx) error {
-	indexesBucket := dbTx.Metadata().Bucket(indexTipsBucketName)
-	for _, indexer := range m.enabledIndexes {
-		// Nothing to do if the index tip already exists.
-		idxKey := indexer.Key()
-		if indexesBucket.Get(idxKey) != nil {
-			continue
-		}
-
-		// The tip for the index does not exist, so create it and
-		// invoke the create callback for the index so it can perform
-		// any one-time initialization it requires.
-		if err := indexer.Create(dbTx); err != nil {
-			return err
-		}
-
-		// TODO (Mike): this is temporary solution to prevent node from not starting
-		// because it thinks indexers are not initialized.
-		// Indexers, however, do not work properly, and a general solution to their work operation is required
-		indexesBucket.Put(idxKey, []byte{0})
-	}
-
-	return nil
-}
-
-// Init initializes the enabled indexes.  This is called during chain
-// initialization and primarily consists of catching up all indexes to the
-// current best chain tip.  This is necessary since each index can be disabled
-// and re-enabled at any time and attempting to catch-up indexes at the same
-// time new blocks are being downloaded would lead to an overall longer time to
-// catch up due to the I/O contention.
-//
-// This is part of the blockchain.IndexManager interface.
-func (m *Manager) Init(db database.DB, blockDAG *blockdag.BlockDAG, interrupt <-chan struct{}) error {
-	// Nothing to do when no indexes are enabled.
-	if len(m.enabledIndexes) == 0 {
-		return nil
-	}
-
-	if interruptRequested(interrupt) {
-		return errInterruptRequested
-	}
-
-	m.db = db
-
-	// Finish and drops that were previously interrupted.
-	if err := m.maybeFinishDrops(interrupt); err != nil {
-		return err
-	}
-
-	// Create the initial state for the indexes as needed.
-	err := m.db.Update(func(dbTx database.Tx) error {
-		// Create the bucket for the current tips as needed.
-		meta := dbTx.Metadata()
-		_, err := meta.CreateBucketIfNotExists(indexTipsBucketName)
-		if err != nil {
-			return err
-		}
-		if _, err := meta.CreateBucketIfNotExists(indexCurrentBlockIDBucketName); err != nil {
-			return err
-		}
-
-		return m.maybeCreateIndexes(dbTx)
-	})
-	if err != nil {
-		return err
-	}
-
-	// Initialize each of the enabled indexes.
-	for _, indexer := range m.enabledIndexes {
-		if err := indexer.Init(db, blockDAG); err != nil {
-			return err
-		}
-	}
-
-	return m.recoverIfNeeded()
-}
-
-// recoverIfNeeded checks if the node worked for some time
-// without one of the current enabled indexes, and if it's
-// the case, recovers the missing blocks from the index.
-func (m *Manager) recoverIfNeeded() error {
-	return m.db.Update(func(dbTx database.Tx) error {
-		lastKnownBlockID := blockdag.DBFetchCurrentBlockID(dbTx)
-		for _, indexer := range m.enabledIndexes {
-			serializedCurrentIdxBlockID := dbTx.Metadata().Bucket(indexCurrentBlockIDBucketName).Get(indexer.Key())
-			currentIdxBlockID := uint64(0)
-			if serializedCurrentIdxBlockID != nil {
-				currentIdxBlockID = blockdag.DeserializeBlockID(serializedCurrentIdxBlockID)
-			}
-			if lastKnownBlockID > currentIdxBlockID {
-				err := indexer.Recover(dbTx, currentIdxBlockID, lastKnownBlockID)
-				if err != nil {
-					return err
-				}
-			}
-		}
-		return nil
-	})
-}
-
-// ConnectBlock must be invoked when a block is extending the main chain.  It
-// keeps track of the state of each index it is managing, performs some sanity
-// checks, and invokes each indexer.
-//
-// This is part of the blockchain.IndexManager interface.
-func (m *Manager) ConnectBlock(dbTx database.Tx, block *util.Block, blockID uint64, dag *blockdag.BlockDAG,
-	txsAcceptanceData blockdag.MultiBlockTxsAcceptanceData, virtualTxsAcceptanceData blockdag.MultiBlockTxsAcceptanceData) error {
-
-	// Call each of the currently active optional indexes with the block
-	// being connected so they can update accordingly.
-	for _, index := range m.enabledIndexes {
-		// Notify the indexer with the connected block so it can index it.
-		if err := index.ConnectBlock(dbTx, block, blockID, dag, txsAcceptanceData, virtualTxsAcceptanceData); err != nil {
-			return err
-		}
-	}
-
-	// Add the new block ID index entry for the block being connected and
-	// update the current internal block ID accordingly.
-	err := m.updateIndexersWithCurrentBlockID(dbTx, block.Hash(), blockID)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-func (m *Manager) updateIndexersWithCurrentBlockID(dbTx database.Tx, blockHash *daghash.Hash, blockID uint64) error {
-	serializedBlockID := blockdag.SerializeBlockID(blockID)
-	for _, index := range m.enabledIndexes {
-		err := dbTx.Metadata().Bucket(indexCurrentBlockIDBucketName).Put(index.Key(), serializedBlockID)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// NewManager returns a new index manager with the provided indexes enabled.
-//
-// The manager returned satisfies the blockchain.IndexManager interface and thus
-// cleanly plugs into the normal blockchain processing path.
-func NewManager(enabledIndexes []Indexer) *Manager {
-	return &Manager{
-		enabledIndexes: enabledIndexes,
-	}
-}
-
-// dropIndex drops the passed index from the database.  Since indexes can be
-// massive, it deletes the index in multiple database transactions in order to
-// keep memory usage to reasonable levels.  It also marks the drop in progress
-// so the drop can be resumed if it is stopped before it is done before the
-// index can be used again.
-func dropIndex(db database.DB, idxKey []byte, idxName string, interrupt <-chan struct{}) error {
-	// Nothing to do if the index doesn't already exist.
-	var needsDelete bool
-	err := db.View(func(dbTx database.Tx) error {
-		indexesBucket := dbTx.Metadata().Bucket(indexTipsBucketName)
-		if indexesBucket != nil && indexesBucket.Get(idxKey) != nil {
-			needsDelete = true
-		}
-		return nil
-	})
-	if err != nil {
-		return err
-	}
-	if !needsDelete {
-		log.Infof("Not dropping %s because it does not exist", idxName)
-		return nil
-	}
-
-	// Mark that the index is in the process of being dropped so that it
-	// can be resumed on the next start if interrupted before the process is
-	// complete.
-	log.Infof("Dropping all %s entries.  This might take a while...",
-		idxName)
-	err = db.Update(func(dbTx database.Tx) error {
-		indexesBucket := dbTx.Metadata().Bucket(indexTipsBucketName)
-		return indexesBucket.Put(indexDropKey(idxKey), idxKey)
-	})
-	if err != nil {
-		return err
-	}
-
-	// Since the indexes can be so large, attempting to simply delete
-	// the bucket in a single database transaction would result in massive
-	// memory usage and likely crash many systems due to ulimits.  In order
-	// to avoid this, use a cursor to delete a maximum number of entries out
-	// of the bucket at a time. Recurse buckets depth-first to delete any
-	// sub-buckets.
-	const maxDeletions = 2000000
-	var totalDeleted uint64
-
-	// Recurse through all buckets in the index, cataloging each for
-	// later deletion.
-	var subBuckets [][][]byte
-	var subBucketClosure func(database.Tx, []byte, [][]byte) error
-	subBucketClosure = func(dbTx database.Tx,
-		subBucket []byte, tlBucket [][]byte) error {
-		// Get full bucket name and append to subBuckets for later
-		// deletion.
-		var bucketName [][]byte
-		if (tlBucket == nil) || (len(tlBucket) == 0) {
-			bucketName = append(bucketName, subBucket)
-		} else {
-			bucketName = append(tlBucket, subBucket)
-		}
-		subBuckets = append(subBuckets, bucketName)
-		// Recurse sub-buckets to append to subBuckets slice.
-		bucket := dbTx.Metadata()
-		for _, subBucketName := range bucketName {
-			bucket = bucket.Bucket(subBucketName)
-		}
-		return bucket.ForEachBucket(func(k []byte) error {
-			return subBucketClosure(dbTx, k, bucketName)
-		})
-	}
-
-	// Call subBucketClosure with top-level bucket.
-	err = db.View(func(dbTx database.Tx) error {
-		return subBucketClosure(dbTx, idxKey, nil)
-	})
-	if err != nil {
-		return nil
-	}
-
-	// Iterate through each sub-bucket in reverse, deepest-first, deleting
-	// all keys inside them and then dropping the buckets themselves.
-	for i := range subBuckets {
-		bucketName := subBuckets[len(subBuckets)-1-i]
-		// Delete maxDeletions key/value pairs at a time.
-		for numDeleted := maxDeletions; numDeleted == maxDeletions; {
-			numDeleted = 0
-			err := db.Update(func(dbTx database.Tx) error {
-				subBucket := dbTx.Metadata()
-				for _, subBucketName := range bucketName {
-					subBucket = subBucket.Bucket(subBucketName)
-				}
-				cursor := subBucket.Cursor()
-				for ok := cursor.First(); ok; ok = cursor.Next() &&
-					numDeleted < maxDeletions {
-
-					if err := cursor.Delete(); err != nil {
-						return err
-					}
-					numDeleted++
-				}
-				return nil
-			})
-			if err != nil {
-				return err
-			}
-
-			if numDeleted > 0 {
-				totalDeleted += uint64(numDeleted)
-				log.Infof("Deleted %d keys (%d total) from %s",
-					numDeleted, totalDeleted, idxName)
-			}
-		}
-
-		if interruptRequested(interrupt) {
-			return errInterruptRequested
-		}
-
-		// Drop the bucket itself.
-		err = db.Update(func(dbTx database.Tx) error {
-			bucket := dbTx.Metadata()
-			for j := 0; j < len(bucketName)-1; j++ {
-				bucket = bucket.Bucket(bucketName[j])
-			}
-			return bucket.DeleteBucket(bucketName[len(bucketName)-1])
-		})
-	}
-
-	// Remove the index tip, index bucket, and in-progress drop flag now
-	// that all index entries have been removed.
-	err = db.Update(func(dbTx database.Tx) error {
-		meta := dbTx.Metadata()
-		indexesBucket := meta.Bucket(indexTipsBucketName)
-		if err := indexesBucket.Delete(idxKey); err != nil {
-			return err
-		}
-
-		if err := meta.Bucket(indexCurrentBlockIDBucketName).Delete(idxKey); err != nil {
-			return err
-		}
-
-		return indexesBucket.Delete(indexDropKey(idxKey))
-	})
-	if err != nil {
-		return err
-	}
-
-	log.Infof("Dropped %s", idxName)
-	return nil
-}

blockdag/indexers/txindex.go

@@ -1,434 +0,0 @@
-// Copyright (c) 2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package indexers
-
-import (
-	"fmt"
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-)
-
-const (
-	// txIndexName is the human-readable name for the index.
-	txIndexName = "transaction index"
-
-	includingBlocksIndexKeyEntrySize = 8 // 4 bytes for offset + 4 bytes for transaction length
-)
-
-var (
-	includingBlocksIndexKey = []byte("includingblocksidx")
-
-	acceptingBlocksIndexKey = []byte("acceptingblocksidx")
-)
-
-// txsAcceptedByVirtual is the in-memory index of txIDs that were accepted
-// by the current virtual
-var txsAcceptedByVirtual map[daghash.TxID]bool
-
-// -----------------------------------------------------------------------------
-// The transaction index consists of an entry for every transaction in the DAG.
-//
-// There are two buckets used in total. The first bucket maps the hash of
-// each transaction to its location in each block it's included in. The second bucket
-// contains all of the blocks that from their viewpoint the transaction has been
-// accepted (i.e. the transaction is found in their blue set without double spends),
-// and their blue block (or themselves) that included the transaction.
-//
-// NOTE: Although it is technically possible for multiple transactions to have
-// the same hash as long as the previous transaction with the same hash is fully
-// spent, this code only stores the most recent one because doing otherwise
-// would add a non-trivial amount of space and overhead for something that will
-// realistically never happen per the probability and even if it did, the old
-// one must be fully spent and so the most likely transaction a caller would
-// want for a given hash is the most recent one anyways.
-//
-// The including blocks index contains a sub bucket for each transaction hash (32 byte each), that its serialized format is:
-//
-//   <block id> = <start offset><tx length>
-//
-//   Field           Type              Size
-//   block id        uint64          8 bytes
-//   start offset    uint32          4 bytes
-//   tx length       uint32          4 bytes
-//   -----
-//   Total: 16 bytes
-//
-// The accepting blocks index contains a sub bucket for each transaction hash (32 byte each), that its serialized format is:
-//
-//   <accepting block id> = <including block id>
-//
-//   Field           Type              Size
-//   accepting block id        uint64          8 bytes
-//   including block id        uint64          8 bytes
-//   -----
-//   Total: 16 bytes
-//
-// -----------------------------------------------------------------------------
-
-func putIncludingBlocksEntry(target []byte, txLoc wire.TxLoc) {
-	byteOrder.PutUint32(target, uint32(txLoc.TxStart))
-	byteOrder.PutUint32(target[4:], uint32(txLoc.TxLen))
-}
-
-func dbPutIncludingBlocksEntry(dbTx database.Tx, txID *daghash.TxID, blockID uint64, serializedData []byte) error {
-	bucket, err := dbTx.Metadata().Bucket(includingBlocksIndexKey).CreateBucketIfNotExists(txID[:])
-	if err != nil {
-		return err
-	}
-	return bucket.Put(blockdag.SerializeBlockID(blockID), serializedData)
-}
-
-func dbPutAcceptingBlocksEntry(dbTx database.Tx, txID *daghash.TxID, blockID uint64, serializedData []byte) error {
-	bucket, err := dbTx.Metadata().Bucket(acceptingBlocksIndexKey).CreateBucketIfNotExists(txID[:])
-	if err != nil {
-		return err
-	}
-	return bucket.Put(blockdag.SerializeBlockID(blockID), serializedData)
-}
-
-// dbFetchFirstTxRegion uses an existing database transaction to fetch the block
-// region for the provided transaction hash from the transaction index.  When
-// there is no entry for the provided hash, nil will be returned for the both
-// the region and the error.
-//
-// P.S Because the transaction can be found in multiple blocks, this function arbitarily
-// returns the first block region that is stored in the txindex.
-func dbFetchFirstTxRegion(dbTx database.Tx, txID *daghash.TxID) (*database.BlockRegion, error) {
-	// Load the record from the database and return now if it doesn't exist.
-	txBucket := dbTx.Metadata().Bucket(includingBlocksIndexKey).Bucket(txID[:])
-	if txBucket == nil {
-		return nil, database.Error{
-			ErrorCode: database.ErrCorruption,
-			Description: fmt.Sprintf("No block region "+
-				"was found for %s", txID),
-		}
-	}
-	cursor := txBucket.Cursor()
-	if ok := cursor.First(); !ok {
-		return nil, database.Error{
-			ErrorCode: database.ErrCorruption,
-			Description: fmt.Sprintf("No block region "+
-				"was found for %s", txID),
-		}
-	}
-	serializedBlockID := cursor.Key()
-	serializedData := cursor.Value()
-	if len(serializedData) == 0 {
-		return nil, nil
-	}
-
-	// Ensure the serialized data has enough bytes to properly deserialize.
-	if len(serializedData) < includingBlocksIndexKeyEntrySize {
-		return nil, database.Error{
-			ErrorCode: database.ErrCorruption,
-			Description: fmt.Sprintf("corrupt transaction index "+
-				"entry for %s", txID),
-		}
-	}
-
-	// Load the block hash associated with the block ID.
-	hash, err := blockdag.DBFetchBlockHashBySerializedID(dbTx, serializedBlockID)
-	if err != nil {
-		return nil, database.Error{
-			ErrorCode: database.ErrCorruption,
-			Description: fmt.Sprintf("corrupt transaction index "+
-				"entry for %s: %s", txID, err),
-		}
-	}
-
-	// Deserialize the final entry.
-	region := database.BlockRegion{Hash: &daghash.Hash{}}
-	copy(region.Hash[:], hash[:])
-	region.Offset = byteOrder.Uint32(serializedData[:4])
-	region.Len = byteOrder.Uint32(serializedData[4:])
-
-	return &region, nil
-}
-
-// dbAddTxIndexEntries uses an existing database transaction to add a
-// transaction index entry for every transaction in the passed block.
-func dbAddTxIndexEntries(dbTx database.Tx, block *util.Block, blockID uint64, txsAcceptanceData blockdag.MultiBlockTxsAcceptanceData) error {
-	// The offset and length of the transactions within the serialized
-	// block.
-	txLocs, err := block.TxLoc()
-	if err != nil {
-		return err
-	}
-
-	// As an optimization, allocate a single slice big enough to hold all
-	// of the serialized transaction index entries for the block and
-	// serialize them directly into the slice.  Then, pass the appropriate
-	// subslice to the database to be written.  This approach significantly
-	// cuts down on the number of required allocations.
-	includingBlocksOffset := 0
-	serializedIncludingBlocksValues := make([]byte, len(block.Transactions())*includingBlocksIndexKeyEntrySize)
-	for i, tx := range block.Transactions() {
-		putIncludingBlocksEntry(serializedIncludingBlocksValues[includingBlocksOffset:], txLocs[i])
-		endOffset := includingBlocksOffset + includingBlocksIndexKeyEntrySize
-		err := dbPutIncludingBlocksEntry(dbTx, tx.ID(), blockID,
-			serializedIncludingBlocksValues[includingBlocksOffset:endOffset:endOffset])
-		if err != nil {
-			return err
-		}
-		includingBlocksOffset += includingBlocksIndexKeyEntrySize
-	}
-
-	for includingBlockHash, blockTxsAcceptanceData := range txsAcceptanceData {
-		var includingBlockID uint64
-		if includingBlockHash.IsEqual(block.Hash()) {
-			includingBlockID = blockID
-		} else {
-			includingBlockID, err = blockdag.DBFetchBlockIDByHash(dbTx, &includingBlockHash)
-			if err != nil {
-				return err
-			}
-		}
-
-		serializedIncludingBlockID := blockdag.SerializeBlockID(includingBlockID)
-
-		for _, txAcceptanceData := range blockTxsAcceptanceData {
-			err = dbPutAcceptingBlocksEntry(dbTx, txAcceptanceData.Tx.ID(), blockID, serializedIncludingBlockID)
-			if err != nil {
-				return err
-			}
-		}
-	}
-
-	return nil
-}
-
-func updateTxsAcceptedByVirtual(virtualTxsAcceptanceData blockdag.MultiBlockTxsAcceptanceData) error {
-	// Initialize a new txsAcceptedByVirtual
-	entries := 0
-	for _, blockTxsAcceptanceData := range virtualTxsAcceptanceData {
-		entries += len(blockTxsAcceptanceData)
-	}
-	txsAcceptedByVirtual = make(map[daghash.TxID]bool, entries)
-
-	// Copy virtualTxsAcceptanceData to txsAcceptedByVirtual
-	for _, blockTxsAcceptanceData := range virtualTxsAcceptanceData {
-		for _, txAcceptanceData := range blockTxsAcceptanceData {
-			txsAcceptedByVirtual[*txAcceptanceData.Tx.ID()] = true
-		}
-	}
-
-	return nil
-}
-
-// TxIndex implements a transaction by hash index.  That is to say, it supports
-// querying all transactions by their hash.
-type TxIndex struct {
-	db database.DB
-}
-
-// Ensure the TxIndex type implements the Indexer interface.
-var _ Indexer = (*TxIndex)(nil)
-
-// Init initializes the hash-based transaction index.  In particular, it finds
-// the highest used block ID and stores it for later use when connecting or
-// disconnecting blocks.
-//
-// This is part of the Indexer interface.
-func (idx *TxIndex) Init(db database.DB, dag *blockdag.BlockDAG) error {
-	idx.db = db
-
-	// Initialize the txsAcceptedByVirtual index
-	virtualTxsAcceptanceData, err := dag.TxsAcceptedByVirtual()
-	if err != nil {
-		return err
-	}
-	err = updateTxsAcceptedByVirtual(virtualTxsAcceptanceData)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// Key returns the database key to use for the index as a byte slice.
-//
-// This is part of the Indexer interface.
-func (idx *TxIndex) Key() []byte {
-	return includingBlocksIndexKey
-}
-
-// Name returns the human-readable name of the index.
-//
-// This is part of the Indexer interface.
-func (idx *TxIndex) Name() string {
-	return txIndexName
-}
-
-// Create is invoked when the indexer manager determines the index needs
-// to be created for the first time.  It creates the buckets for the hash-based
-// transaction index and the internal block ID indexes.
-//
-// This is part of the Indexer interface.
-func (idx *TxIndex) Create(dbTx database.Tx) error {
-	meta := dbTx.Metadata()
-	if _, err := meta.CreateBucket(includingBlocksIndexKey); err != nil {
-		return err
-	}
-	_, err := meta.CreateBucket(acceptingBlocksIndexKey)
-	return err
-
-}
-
-// ConnectBlock is invoked by the index manager when a new block has been
-// connected to the DAG.  This indexer adds a hash-to-transaction mapping
-// for every transaction in the passed block.
-//
-// This is part of the Indexer interface.
-func (idx *TxIndex) ConnectBlock(dbTx database.Tx, block *util.Block, blockID uint64, dag *blockdag.BlockDAG,
-	acceptedTxsData blockdag.MultiBlockTxsAcceptanceData, virtualTxsAcceptanceData blockdag.MultiBlockTxsAcceptanceData) error {
-	if err := dbAddTxIndexEntries(dbTx, block, blockID, acceptedTxsData); err != nil {
-		return err
-	}
-
-	err := updateTxsAcceptedByVirtual(virtualTxsAcceptanceData)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// TxFirstBlockRegion returns the first block region for the provided transaction hash
-// from the transaction index.  The block region can in turn be used to load the
-// raw transaction bytes.  When there is no entry for the provided hash, nil
-// will be returned for the both the entry and the error.
-//
-// This function is safe for concurrent access.
-func (idx *TxIndex) TxFirstBlockRegion(txID *daghash.TxID) (*database.BlockRegion, error) {
-	var region *database.BlockRegion
-	err := idx.db.View(func(dbTx database.Tx) error {
-		var err error
-		region, err = dbFetchFirstTxRegion(dbTx, txID)
-		return err
-	})
-	return region, err
-}
-
-// TxBlocks returns the hashes of the blocks where the transaction exists
-func (idx *TxIndex) TxBlocks(txHash *daghash.Hash) ([]*daghash.Hash, error) {
-	blockHashes := make([]*daghash.Hash, 0)
-	err := idx.db.View(func(dbTx database.Tx) error {
-		var err error
-		blockHashes, err = dbFetchTxBlocks(dbTx, txHash)
-		if err != nil {
-			return err
-		}
-		return nil
-	})
-	return blockHashes, err
-}
-
-func dbFetchTxBlocks(dbTx database.Tx, txHash *daghash.Hash) ([]*daghash.Hash, error) {
-	blockHashes := make([]*daghash.Hash, 0)
-	bucket := dbTx.Metadata().Bucket(includingBlocksIndexKey).Bucket(txHash[:])
-	if bucket == nil {
-		return nil, database.Error{
-			ErrorCode: database.ErrCorruption,
-			Description: fmt.Sprintf("No including blocks "+
-				"were found for %s", txHash),
-		}
-	}
-	err := bucket.ForEach(func(serializedBlockID, _ []byte) error {
-		blockHash, err := blockdag.DBFetchBlockHashBySerializedID(dbTx, serializedBlockID)
-		if err != nil {
-			return err
-		}
-		blockHashes = append(blockHashes, blockHash)
-		return nil
-	})
-	if err != nil {
-		return nil, err
-	}
-	return blockHashes, nil
-}
-
-// BlockThatAcceptedTx returns the hash of the block where the transaction got accepted (from the virtual block point of view)
-func (idx *TxIndex) BlockThatAcceptedTx(dag *blockdag.BlockDAG, txID *daghash.TxID) (*daghash.Hash, error) {
-	var acceptingBlock *daghash.Hash
-	err := idx.db.View(func(dbTx database.Tx) error {
-		var err error
-		acceptingBlock, err = dbFetchTxAcceptingBlock(dbTx, txID, dag)
-		return err
-	})
-	return acceptingBlock, err
-}
-
-func dbFetchTxAcceptingBlock(dbTx database.Tx, txID *daghash.TxID, dag *blockdag.BlockDAG) (*daghash.Hash, error) {
-	// If the transaction was accepted by the current virtual,
-	// return the zeroHash immediately
-	if _, ok := txsAcceptedByVirtual[*txID]; ok {
-		return &daghash.ZeroHash, nil
-	}
-
-	bucket := dbTx.Metadata().Bucket(acceptingBlocksIndexKey).Bucket(txID[:])
-	if bucket == nil {
-		return nil, database.Error{
-			ErrorCode: database.ErrCorruption,
-			Description: fmt.Sprintf("No accepting blocks bucket "+
-				"exists for %s", txID),
-		}
-	}
-	cursor := bucket.Cursor()
-	if !cursor.First() {
-		return nil, database.Error{
-			ErrorCode: database.ErrCorruption,
-			Description: fmt.Sprintf("Accepting blocks bucket is "+
-				"empty for %s", txID),
-		}
-	}
-	for ; cursor.Key() != nil; cursor.Next() {
-		blockHash, err := blockdag.DBFetchBlockHashBySerializedID(dbTx, cursor.Key())
-		if err != nil {
-			return nil, err
-		}
-		if dag.IsInSelectedParentChain(blockHash) {
-			return blockHash, nil
-		}
-	}
-	return nil, nil
-}
-
-// NewTxIndex returns a new instance of an indexer that is used to create a
-// mapping of the hashes of all transactions in the blockchain to the respective
-// block, location within the block, and size of the transaction.
-//
-// It implements the Indexer interface which plugs into the IndexManager that in
-// turn is used by the blockchain package.  This allows the index to be
-// seamlessly maintained along with the chain.
-func NewTxIndex() *TxIndex {
-	return &TxIndex{}
-}
-
-// DropTxIndex drops the transaction index from the provided database if it
-// exists.  Since the address index relies on it, the address index will also be
-// dropped when it exists.
-func DropTxIndex(db database.DB, interrupt <-chan struct{}) error {
-	err := dropIndex(db, addrIndexKey, addrIndexName, interrupt)
-	if err != nil {
-		return err
-	}
-
-	err = dropIndex(db, includingBlocksIndexKey, addrIndexName, interrupt)
-	if err != nil {
-		return err
-	}
-
-	return dropIndex(db, acceptingBlocksIndexKey, txIndexName, interrupt)
-}
-
-// Recover is invoked when the indexer wasn't turned on for several blocks
-// and the indexer needs to close the gaps.
-//
-// This is part of the Indexer interface.
-func (idx *TxIndex) Recover(dbTx database.Tx, currentBlockID, lastKnownBlockID uint64) error {
-	return fmt.Errorf("txindex was turned off for %d blocks and can't be recovered."+
-		" To resume working drop the txindex with --droptxindex", lastKnownBlockID-currentBlockID)
-}

blockdag/indexers/txindex_test.go

@@ -1,144 +0,0 @@
-package indexers
-
-import (
-	"bytes"
-	"reflect"
-	"testing"
-
-	"github.com/daglabs/btcd/blockdag"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/mining"
-	"github.com/daglabs/btcd/txscript"
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-)
-
-func createTransaction(t *testing.T, value uint64, originTx *wire.MsgTx, outputIndex uint32) *wire.MsgTx {
-	signatureScript, err := txscript.PayToScriptHashSignatureScript(blockdag.OpTrueScript, nil)
-	if err != nil {
-		t.Fatalf("Error creating signature script: %s", err)
-	}
-	txIn := &wire.TxIn{
-		PreviousOutpoint: wire.Outpoint{
-			TxID:  *originTx.TxID(),
-			Index: outputIndex,
-		},
-		Sequence:        wire.MaxTxInSequenceNum,
-		SignatureScript: signatureScript,
-	}
-	txOut := wire.NewTxOut(value, blockdag.OpTrueScript)
-	tx := wire.NewNativeMsgTx(wire.TxVersion, []*wire.TxIn{txIn}, []*wire.TxOut{txOut})
-
-	return tx
-}
-
-func TestTxIndexConnectBlock(t *testing.T) {
-	blocks := make(map[daghash.Hash]*util.Block)
-
-	txIndex := NewTxIndex()
-	indexManager := NewManager([]Indexer{txIndex})
-
-	params := dagconfig.SimNetParams
-	params.BlockCoinbaseMaturity = 0
-	params.K = 1
-
-	config := blockdag.Config{
-		IndexManager: indexManager,
-		DAGParams:    &params,
-	}
-
-	dag, teardown, err := blockdag.DAGSetup("TestTxIndexConnectBlock", config)
-	if err != nil {
-		t.Fatalf("TestTxIndexConnectBlock: Failed to setup DAG instance: %v", err)
-	}
-	if teardown != nil {
-		defer teardown()
-	}
-
-	prepareAndProcessBlock := func(parentHashes []*daghash.Hash, transactions []*wire.MsgTx, blockName string) *wire.MsgBlock {
-		block, err := mining.PrepareBlockForTest(dag, &params, parentHashes, transactions, false)
-		if err != nil {
-			t.Fatalf("TestTxIndexConnectBlock: block %v got unexpected error from PrepareBlockForTest: %v", blockName, err)
-		}
-		utilBlock := util.NewBlock(block)
-		blocks[*block.BlockHash()] = utilBlock
-		isOrphan, delay, err := dag.ProcessBlock(utilBlock, blockdag.BFNoPoWCheck)
-		if err != nil {
-			t.Fatalf("TestTxIndexConnectBlock: dag.ProcessBlock got unexpected error for block %v: %v", blockName, err)
-		}
-		if delay != 0 {
-			t.Fatalf("TestTxIndexConnectBlock: block %s "+
-				"is too far in the future", blockName)
-		}
-		if isOrphan {
-			t.Fatalf("TestTxIndexConnectBlock: block %v was unexpectedly orphan", blockName)
-		}
-		return block
-	}
-
-	block1 := prepareAndProcessBlock([]*daghash.Hash{params.GenesisHash}, nil, "1")
-	block2Tx := createTransaction(t, block1.Transactions[0].TxOut[0].Value, block1.Transactions[0], 0)
-	block2 := prepareAndProcessBlock([]*daghash.Hash{block1.BlockHash()}, []*wire.MsgTx{block2Tx}, "2")
-	block3Tx := createTransaction(t, block2.Transactions[0].TxOut[0].Value, block2.Transactions[0], 0)
-	block3 := prepareAndProcessBlock([]*daghash.Hash{block2.BlockHash()}, []*wire.MsgTx{block3Tx}, "3")
-
-	block2TxID := block2Tx.TxID()
-	block2TxNewAcceptedBlock, err := txIndex.BlockThatAcceptedTx(dag, block2TxID)
-	if err != nil {
-		t.Errorf("TestTxIndexConnectBlock: TxAcceptedInBlock: %v", err)
-	}
-	block3Hash := block3.BlockHash()
-	if !block2TxNewAcceptedBlock.IsEqual(block3Hash) {
-		t.Errorf("TestTxIndexConnectBlock: block2Tx should've "+
-			"been accepted in block %v but instead got accepted in block %v", block3Hash, block2TxNewAcceptedBlock)
-	}
-
-	block3TxID := block3Tx.TxID()
-	block3TxNewAcceptedBlock, err := txIndex.BlockThatAcceptedTx(dag, block3TxID)
-	if err != nil {
-		t.Errorf("TestTxIndexConnectBlock: TxAcceptedInBlock: %v", err)
-	}
-	if !block3TxNewAcceptedBlock.IsEqual(&daghash.ZeroHash) {
-		t.Errorf("TestTxIndexConnectBlock: block3Tx should've "+
-			"been accepted by the virtual block but instead got accepted in block %v", block3TxNewAcceptedBlock)
-	}
-
-	block3A := prepareAndProcessBlock([]*daghash.Hash{block2.BlockHash()}, []*wire.MsgTx{block3Tx}, "3A")
-	block4 := prepareAndProcessBlock([]*daghash.Hash{block3.BlockHash()}, nil, "4")
-	prepareAndProcessBlock([]*daghash.Hash{block3A.BlockHash(), block4.BlockHash()}, nil, "5")
-
-	block2TxAcceptedBlock, err := txIndex.BlockThatAcceptedTx(dag, block2TxID)
-	if err != nil {
-		t.Errorf("TestTxIndexConnectBlock: TxAcceptedInBlock: %v", err)
-	}
-	block3AHash := block3A.BlockHash()
-	if !block2TxAcceptedBlock.IsEqual(block3AHash) {
-		t.Errorf("TestTxIndexConnectBlock: block2Tx should've "+
-			"been accepted in block %v but instead got accepted in block %v", block3AHash, block2TxAcceptedBlock)
-	}
-
-	region, err := txIndex.TxFirstBlockRegion(block3TxID)
-	if err != nil {
-		t.Fatalf("TestTxIndexConnectBlock: no block region was found for block3Tx")
-	}
-	regionBlock, ok := blocks[*region.Hash]
-	if !ok {
-		t.Fatalf("TestTxIndexConnectBlock: couldn't find block with hash %v", region.Hash)
-	}
-
-	regionBlockBytes, err := regionBlock.Bytes()
-	if err != nil {
-		t.Fatalf("TestTxIndexConnectBlock: Couldn't serialize block to bytes")
-	}
-	block3TxInBlock := regionBlockBytes[region.Offset : region.Offset+region.Len]
-
-	block3TxBuf := bytes.NewBuffer(make([]byte, 0, block3Tx.SerializeSize()))
-	block3Tx.BtcEncode(block3TxBuf, 0)
-	blockTxBytes := block3TxBuf.Bytes()
-
-	if !reflect.DeepEqual(blockTxBytes, block3TxInBlock) {
-		t.Errorf("TestTxIndexConnectBlock: the block region that was in the bucket doesn't match block3Tx")
-	}
-
-}

blockdag/mediantime.go

@@ -1,218 +0,0 @@
-// Copyright (c) 2013-2014 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"math"
-	"sort"
-	"sync"
-	"time"
-)
-
-const (
-	// maxAllowedOffsetSeconds is the maximum number of seconds in either
-	// direction that local clock will be adjusted.  When the median time
-	// of the network is outside of this range, no offset will be applied.
-	maxAllowedOffsetSecs = 70 * 60 // 1 hour 10 minutes
-
-	// similarTimeSecs is the number of seconds in either direction from the
-	// local clock that is used to determine that it is likley wrong and
-	// hence to show a warning.
-	similarTimeSecs = 5 * 60 // 5 minutes
-)
-
-var (
-	// maxMedianTimeEntries is the maximum number of entries allowed in the
-	// median time data.  This is a variable as opposed to a constant so the
-	// test code can modify it.
-	maxMedianTimeEntries = 200
-)
-
-// MedianTimeSource provides a mechanism to add several time samples which are
-// used to determine a median time which is then used as an offset to the local
-// clock.
-type MedianTimeSource interface {
-	// AdjustedTime returns the current time adjusted by the median time
-	// offset as calculated from the time samples added by AddTimeSample.
-	AdjustedTime() time.Time
-
-	// AddTimeSample adds a time sample that is used when determining the
-	// median time of the added samples.
-	AddTimeSample(id string, timeVal time.Time)
-
-	// Offset returns the number of seconds to adjust the local clock based
-	// upon the median of the time samples added by AddTimeData.
-	Offset() time.Duration
-}
-
-// int64Sorter implements sort.Interface to allow a slice of 64-bit integers to
-// be sorted.
-type int64Sorter []int64
-
-// Len returns the number of 64-bit integers in the slice.  It is part of the
-// sort.Interface implementation.
-func (s int64Sorter) Len() int {
-	return len(s)
-}
-
-// Swap swaps the 64-bit integers at the passed indices.  It is part of the
-// sort.Interface implementation.
-func (s int64Sorter) Swap(i, j int) {
-	s[i], s[j] = s[j], s[i]
-}
-
-// Less returns whether the 64-bit integer with index i should sort before the
-// 64-bit integer with index j.  It is part of the sort.Interface
-// implementation.
-func (s int64Sorter) Less(i, j int) bool {
-	return s[i] < s[j]
-}
-
-// medianTime provides an implementation of the MedianTimeSource interface.
-// It is limited to maxMedianTimeEntries includes the same buggy behavior as
-// the time offset mechanism in Bitcoin Core.  This is necessary because it is
-// used in the consensus code.
-type medianTime struct {
-	mtx                sync.Mutex
-	knownIDs           map[string]struct{}
-	offsets            []int64
-	offsetSecs         int64
-	invalidTimeChecked bool
-}
-
-// Ensure the medianTime type implements the MedianTimeSource interface.
-var _ MedianTimeSource = (*medianTime)(nil)
-
-// AdjustedTime returns the current time adjusted by the median time offset as
-// calculated from the time samples added by AddTimeSample.
-//
-// This function is safe for concurrent access and is part of the
-// MedianTimeSource interface implementation.
-func (m *medianTime) AdjustedTime() time.Time {
-	m.mtx.Lock()
-	defer m.mtx.Unlock()
-
-	// Limit the adjusted time to 1 second precision.
-	now := time.Unix(time.Now().Unix(), 0)
-	return now.Add(time.Duration(m.offsetSecs) * time.Second)
-}
-
-// AddTimeSample adds a time sample that is used when determining the median
-// time of the added samples.
-//
-// This function is safe for concurrent access and is part of the
-// MedianTimeSource interface implementation.
-func (m *medianTime) AddTimeSample(sourceID string, timeVal time.Time) {
-	m.mtx.Lock()
-	defer m.mtx.Unlock()
-
-	// Don't add time data from the same source.
-	if _, exists := m.knownIDs[sourceID]; exists {
-		return
-	}
-	m.knownIDs[sourceID] = struct{}{}
-
-	// Truncate the provided offset to seconds and append it to the slice
-	// of offsets while respecting the maximum number of allowed entries by
-	// replacing the oldest entry with the new entry once the maximum number
-	// of entries is reached.
-	now := time.Unix(time.Now().Unix(), 0)
-	offsetSecs := int64(timeVal.Sub(now).Seconds())
-	numOffsets := len(m.offsets)
-	if numOffsets == maxMedianTimeEntries && maxMedianTimeEntries > 0 {
-		m.offsets = m.offsets[1:]
-		numOffsets--
-	}
-	m.offsets = append(m.offsets, offsetSecs)
-	numOffsets++
-
-	// Sort the offsets so the median can be obtained as needed later.
-	sortedOffsets := make([]int64, numOffsets)
-	copy(sortedOffsets, m.offsets)
-	sort.Sort(int64Sorter(sortedOffsets))
-
-	offsetDuration := time.Duration(offsetSecs) * time.Second
-	log.Debugf("Added time sample of %s (total: %d)", offsetDuration,
-		numOffsets)
-
-	// NOTE: The following code intentionally has a bug to mirror the
-	// buggy behavior in Bitcoin Core since the median time is used in the
-	// consensus rules.
-	//
-	// In particular, the offset is only updated when the number of entries
-	// is odd, but the max number of entries is 200, an even number.  Thus,
-	// the offset will never be updated again once the max number of entries
-	// is reached.
-
-	// The median offset is only updated when there are enough offsets and
-	// the number of offsets is odd so the middle value is the true median.
-	// Thus, there is nothing to do when those conditions are not met.
-	if numOffsets < 5 || numOffsets&0x01 != 1 {
-		return
-	}
-
-	// At this point the number of offsets in the list is odd, so the
-	// middle value of the sorted offsets is the median.
-	median := sortedOffsets[numOffsets/2]
-
-	// Set the new offset when the median offset is within the allowed
-	// offset range.
-	if math.Abs(float64(median)) < maxAllowedOffsetSecs {
-		m.offsetSecs = median
-	} else {
-		// The median offset of all added time data is larger than the
-		// maximum allowed offset, so don't use an offset.  This
-		// effectively limits how far the local clock can be skewed.
-		m.offsetSecs = 0
-
-		if !m.invalidTimeChecked {
-			m.invalidTimeChecked = true
-
-			// Find if any time samples have a time that is close
-			// to the local time.
-			var remoteHasCloseTime bool
-			for _, offset := range sortedOffsets {
-				if math.Abs(float64(offset)) < similarTimeSecs {
-					remoteHasCloseTime = true
-					break
-				}
-			}
-
-			// Warn if none of the time samples are close.
-			if !remoteHasCloseTime {
-				log.Warnf("Please check your date and time " +
-					"are correct!  btcd will not work " +
-					"properly with an invalid time")
-			}
-		}
-	}
-
-	medianDuration := time.Duration(m.offsetSecs) * time.Second
-	log.Debugf("New time offset: %d", medianDuration)
-}
-
-// Offset returns the number of seconds to adjust the local clock based upon the
-// median of the time samples added by AddTimeData.
-//
-// This function is safe for concurrent access and is part of the
-// MedianTimeSource interface implementation.
-func (m *medianTime) Offset() time.Duration {
-	m.mtx.Lock()
-	defer m.mtx.Unlock()
-
-	return time.Duration(m.offsetSecs) * time.Second
-}
-
-// NewMedianTime returns a new instance of concurrency-safe implementation of
-// the MedianTimeSource interface.  The returned implementation contains the
-// rules necessary for proper time handling in the chain consensus rules and
-// expects the time samples to be added from the timestamp field of the version
-// message received from remote peers that successfully connect and negotiate.
-func NewMedianTime() MedianTimeSource {
-	return &medianTime{
-		knownIDs: make(map[string]struct{}),
-		offsets:  make([]int64, 0, maxMedianTimeEntries),
-	}
-}

blockdag/mediantime_test.go

@@ -1,104 +0,0 @@
-// Copyright (c) 2013-2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"strconv"
-	"testing"
-	"time"
-)
-
-// TestMedianTime tests the medianTime implementation.
-func TestMedianTime(t *testing.T) {
-	tests := []struct {
-		in         []int64
-		wantOffset int64
-		useDupID   bool
-	}{
-		// Not enough samples must result in an offset of 0.
-		{in: []int64{1}, wantOffset: 0},
-		{in: []int64{1, 2}, wantOffset: 0},
-		{in: []int64{1, 2, 3}, wantOffset: 0},
-		{in: []int64{1, 2, 3, 4}, wantOffset: 0},
-
-		// Various number of entries.  The expected offset is only
-		// updated on odd number of elements.
-		{in: []int64{-13, 57, -4, -23, -12}, wantOffset: -12},
-		{in: []int64{55, -13, 61, -52, 39, 55}, wantOffset: 39},
-		{in: []int64{-62, -58, -30, -62, 51, -30, 15}, wantOffset: -30},
-		{in: []int64{29, -47, 39, 54, 42, 41, 8, -33}, wantOffset: 39},
-		{in: []int64{37, 54, 9, -21, -56, -36, 5, -11, -39}, wantOffset: -11},
-		{in: []int64{57, -28, 25, -39, 9, 63, -16, 19, -60, 25}, wantOffset: 9},
-		{in: []int64{-5, -4, -3, -2, -1}, wantOffset: -3, useDupID: true},
-
-		// The offset stops being updated once the max number of entries
-		// has been reached.  This is actually a bug from Bitcoin Core,
-		// but since the time is ultimately used as a part of the
-		// consensus rules, it must be mirrored.
-		{in: []int64{-67, 67, -50, 24, 63, 17, 58, -14, 5, -32, -52}, wantOffset: 17},
-		{in: []int64{-67, 67, -50, 24, 63, 17, 58, -14, 5, -32, -52, 45}, wantOffset: 17},
-		{in: []int64{-67, 67, -50, 24, 63, 17, 58, -14, 5, -32, -52, 45, 4}, wantOffset: 17},
-
-		// Offsets that are too far away from the local time should
-		// be ignored.
-		{in: []int64{-4201, 4202, -4203, 4204, -4205}, wantOffset: 0},
-
-		// Exercise the condition where the median offset is greater
-		// than the max allowed adjustment, but there is at least one
-		// sample that is close enough to the current time to avoid
-		// triggering a warning about an invalid local clock.
-		{in: []int64{4201, 4202, 4203, 4204, -299}, wantOffset: 0},
-	}
-
-	// Modify the max number of allowed median time entries for these tests.
-	maxMedianTimeEntries = 10
-	defer func() { maxMedianTimeEntries = 200 }()
-
-	for i, test := range tests {
-		filter := NewMedianTime()
-		for j, offset := range test.in {
-			id := strconv.Itoa(j)
-			now := time.Unix(time.Now().Unix(), 0)
-			tOffset := now.Add(time.Duration(offset) * time.Second)
-			filter.AddTimeSample(id, tOffset)
-
-			// Ensure the duplicate IDs are ignored.
-			if test.useDupID {
-				// Modify the offsets to ensure the final median
-				// would be different if the duplicate is added.
-				tOffset = tOffset.Add(time.Duration(offset) *
-					time.Second)
-				filter.AddTimeSample(id, tOffset)
-			}
-		}
-
-		// Since it is possible that the time.Now call in AddTimeSample
-		// and the time.Now calls here in the tests will be off by one
-		// second, allow a fudge factor to compensate.
-		gotOffset := filter.Offset()
-		wantOffset := time.Duration(test.wantOffset) * time.Second
-		wantOffset2 := time.Duration(test.wantOffset-1) * time.Second
-		if gotOffset != wantOffset && gotOffset != wantOffset2 {
-			t.Errorf("Offset #%d: unexpected offset -- got %v, "+
-				"want %v or %v", i, gotOffset, wantOffset,
-				wantOffset2)
-			continue
-		}
-
-		// Since it is possible that the time.Now call in AdjustedTime
-		// and the time.Now call here in the tests will be off by one
-		// second, allow a fudge factor to compensate.
-		adjustedTime := filter.AdjustedTime()
-		now := time.Unix(time.Now().Unix(), 0)
-		wantTime := now.Add(filter.Offset())
-		wantTime2 := now.Add(filter.Offset() - time.Second)
-		if !adjustedTime.Equal(wantTime) && !adjustedTime.Equal(wantTime2) {
-			t.Errorf("AdjustedTime #%d: unexpected result -- got %v, "+
-				"want %v or %v", i, adjustedTime, wantTime,
-				wantTime2)
-			continue
-		}
-	}
-}

blockdag/phantom.go

@@ -1,105 +0,0 @@
-package blockdag
-
-import (
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-// phantom calculates and returns the block's blue set, selected parent and blue score.
-// Chain start is determined by going down the DAG through the selected path
-// (follow the selected parent of each block) k + 1 steps.
-// The blue set of a block are all blue blocks in its past.
-// To optimize memory usage, for each block we are storing only the blue blocks in
-// its selected parent's anticone that are in the future of the chain start
-// as well as the selected parent itself - the rest of the
-// blue set can be restored by traversing the selected parent chain and combining
-// the .blues of all blocks in it.
-// The blue score is the total number of blocks in this block's blue set
-// of the selected parent. (the blue score of the genesis block is defined as 0)
-// The selected parent is chosen by determining which block's parent will give this block the highest blue score.
-func phantom(block *blockNode, k uint32) (blues []*blockNode, selectedParent *blockNode, score uint64) {
-	bestScore := uint64(0)
-	var bestParent *blockNode
-	var bestBlues []*blockNode
-	var bestHash *daghash.Hash
-	for _, parent := range block.parents {
-		chainStart := digToChainStart(parent, k)
-		candidates := blueCandidates(chainStart)
-		blues := traverseCandidates(block, candidates, parent)
-		score := uint64(len(blues)) + parent.blueScore
-
-		if score > bestScore || (score == bestScore && (bestHash == nil || daghash.Less(parent.hash, bestHash))) {
-			bestScore = score
-			bestBlues = blues
-			bestParent = parent
-			bestHash = parent.hash
-		}
-	}
-
-	return bestBlues, bestParent, bestScore
-}
-
-// digToChainStart digs through the selected path and returns the block in depth k+1
-func digToChainStart(parent *blockNode, k uint32) *blockNode {
-	current := parent
-
-	for i := uint32(0); i < k; i++ {
-		if current.isGenesis() {
-			break
-		}
-		current = current.selectedParent
-	}
-
-	return current
-}
-
-func blueCandidates(chainStart *blockNode) blockSet {
-	candidates := newSet()
-	candidates.add(chainStart)
-
-	queue := []*blockNode{chainStart}
-	for len(queue) > 0 {
-		var current *blockNode
-		current, queue = queue[0], queue[1:]
-
-		children := current.children
-		for _, child := range children {
-			if !candidates.contains(child) {
-				candidates.add(child)
-				queue = append(queue, child)
-			}
-		}
-	}
-
-	return candidates
-}
-
-//traverseCandidates returns all the blocks that are in the future of the chain start and in the anticone of the selected parent
-func traverseCandidates(newBlock *blockNode, candidates blockSet, selectedParent *blockNode) []*blockNode {
-	blues := []*blockNode{}
-	selectedParentPast := newSet()
-	queue := newDownHeap()
-	visited := newSet()
-
-	for _, parent := range newBlock.parents {
-		queue.Push(parent)
-	}
-
-	for queue.Len() > 0 {
-		current := queue.pop()
-		if candidates.contains(current) {
-			if current == selectedParent || selectedParentPast.anyChildInSet(current) {
-				selectedParentPast.add(current)
-			} else {
-				blues = append(blues, current)
-			}
-			for _, parent := range current.parents {
-				if !visited.contains(parent) {
-					visited.add(parent)
-					queue.Push(parent)
-				}
-			}
-		}
-	}
-
-	return append(blues, selectedParent)
-}

blockdag/phantom_test.go

@@ -1,892 +0,0 @@
-package blockdag
-
-import (
-	"fmt"
-	"reflect"
-	"sort"
-	"testing"
-	"time"
-
-	"github.com/daglabs/btcd/util/daghash"
-
-	"github.com/daglabs/btcd/dagconfig"
-)
-
-type testBlockData struct {
-	parents                []string
-	id                     string //id is a virtual entity that is used only for tests so we can define relations between blocks without knowing their hash
-	expectedScore          uint64
-	expectedSelectedParent string
-	expectedBlues          []string
-}
-
-//TestPhantom iterate over several dag simulations, and checks
-//that the blue score, blue set and selected parent of each
-//block calculated as expected
-func TestPhantom(t *testing.T) {
-	netParams := dagconfig.SimNetParams
-
-	blockVersion := int32(0x10000000)
-
-	tests := []struct {
-		k              uint32
-		dagData        []*testBlockData
-		virtualBlockID string
-		expectedReds   []string
-	}{
-		{
-			//Block hash order:AKJIHGFEDCB
-			k:              1,
-			virtualBlockID: "K",
-			expectedReds:   []string{"D"},
-			dagData: []*testBlockData{
-				{
-					parents:                []string{"A"},
-					id:                     "B",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "C",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "D",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "E",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"C"},
-					id:                     "F",
-					expectedScore:          2,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"C"},
-				},
-				{
-					parents:                []string{"C", "D"},
-					id:                     "G",
-					expectedScore:          4,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"D", "B", "C"},
-				},
-				{
-					parents:                []string{"C", "E"},
-					id:                     "H",
-					expectedScore:          4,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"E", "B", "C"},
-				},
-				{
-					parents:                []string{"E", "G"},
-					id:                     "I",
-					expectedScore:          5,
-					expectedSelectedParent: "E",
-					expectedBlues:          []string{"G", "D", "E"},
-				},
-				{
-					parents:                []string{"F"},
-					id:                     "J",
-					expectedScore:          3,
-					expectedSelectedParent: "F",
-					expectedBlues:          []string{"F"},
-				},
-				{
-					parents:                []string{"H", "I", "J"},
-					id:                     "K",
-					expectedScore:          9,
-					expectedSelectedParent: "H",
-					expectedBlues:          []string{"I", "G", "J", "F", "H"},
-				},
-			},
-		},
-		{
-			//block hash order:AVUTSRQPONMLKJIHGFEDCB
-			k:              2,
-			virtualBlockID: "V",
-			expectedReds:   []string{"D", "J", "P"},
-			dagData: []*testBlockData{
-				{
-					parents:                []string{"A"},
-					id:                     "B",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "C",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "D",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "E",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"C"},
-					id:                     "F",
-					expectedScore:          2,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"C"},
-				},
-				{
-					parents:                []string{"C"},
-					id:                     "G",
-					expectedScore:          2,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"C"},
-				},
-				{
-					parents:                []string{"G"},
-					id:                     "H",
-					expectedScore:          3,
-					expectedSelectedParent: "G",
-					expectedBlues:          []string{"G"},
-				},
-				{
-					parents:                []string{"E"},
-					id:                     "I",
-					expectedScore:          3,
-					expectedSelectedParent: "E",
-					expectedBlues:          []string{"E"},
-				},
-				{
-					parents:                []string{"E"},
-					id:                     "J",
-					expectedScore:          3,
-					expectedSelectedParent: "E",
-					expectedBlues:          []string{"E"},
-				},
-				{
-					parents:                []string{"I"},
-					id:                     "K",
-					expectedScore:          4,
-					expectedSelectedParent: "I",
-					expectedBlues:          []string{"I"},
-				},
-				{
-					parents:                []string{"K", "H"},
-					id:                     "L",
-					expectedScore:          5,
-					expectedSelectedParent: "K",
-					expectedBlues:          []string{"K"},
-				},
-				{
-					parents:                []string{"F", "L"},
-					id:                     "M",
-					expectedScore:          10,
-					expectedSelectedParent: "F",
-					expectedBlues:          []string{"L", "K", "I", "H", "G", "E", "B", "F"},
-				},
-				{
-					parents:                []string{"G", "K"},
-					id:                     "N",
-					expectedScore:          7,
-					expectedSelectedParent: "G",
-					expectedBlues:          []string{"K", "I", "E", "B", "G"},
-				},
-				{
-					parents:                []string{"J", "N"},
-					id:                     "O",
-					expectedScore:          8,
-					expectedSelectedParent: "N",
-					expectedBlues:          []string{"N"},
-				},
-				{
-					parents:                []string{"D"},
-					id:                     "P",
-					expectedScore:          3,
-					expectedSelectedParent: "D",
-					expectedBlues:          []string{"D"},
-				},
-				{
-					parents:                []string{"O", "P"},
-					id:                     "Q",
-					expectedScore:          10,
-					expectedSelectedParent: "P",
-					expectedBlues:          []string{"O", "N", "K", "J", "I", "E", "P"},
-				},
-				{
-					parents:                []string{"L", "Q"},
-					id:                     "R",
-					expectedScore:          11,
-					expectedSelectedParent: "Q",
-					expectedBlues:          []string{"Q"},
-				},
-				{
-					parents:                []string{"M", "R"},
-					id:                     "S",
-					expectedScore:          15,
-					expectedSelectedParent: "M",
-					expectedBlues:          []string{"R", "Q", "O", "N", "M"},
-				},
-				{
-					parents:                []string{"H", "F"},
-					id:                     "T",
-					expectedScore:          5,
-					expectedSelectedParent: "F",
-					expectedBlues:          []string{"H", "G", "F"},
-				},
-				{
-					parents:                []string{"M", "T"},
-					id:                     "U",
-					expectedScore:          12,
-					expectedSelectedParent: "M",
-					expectedBlues:          []string{"T", "M"},
-				},
-				{
-					parents:                []string{"S", "U"},
-					id:                     "V",
-					expectedScore:          18,
-					expectedSelectedParent: "S",
-					expectedBlues:          []string{"U", "T", "S"},
-				},
-			},
-		},
-		{
-			//Block hash order:AXWVUTSRQPONMLKJIHGFEDCB
-			k:              1,
-			virtualBlockID: "X",
-			expectedReds:   []string{"D", "F", "G", "H", "J", "K", "L", "N", "O", "Q", "R", "S", "U", "V"},
-			dagData: []*testBlockData{
-				{
-					parents:                []string{"A"},
-					id:                     "B",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "C",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "D",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "E",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "F",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "G",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"C"},
-					id:                     "H",
-					expectedScore:          2,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"C"},
-				},
-				{
-					parents:                []string{"C"},
-					id:                     "I",
-					expectedScore:          2,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"C"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "J",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"D"},
-					id:                     "K",
-					expectedScore:          2,
-					expectedSelectedParent: "D",
-					expectedBlues:          []string{"D"},
-				},
-				{
-					parents:                []string{"D"},
-					id:                     "L",
-					expectedScore:          2,
-					expectedSelectedParent: "D",
-					expectedBlues:          []string{"D"},
-				},
-				{
-					parents:                []string{"E"},
-					id:                     "M",
-					expectedScore:          2,
-					expectedSelectedParent: "E",
-					expectedBlues:          []string{"E"},
-				},
-				{
-					parents:                []string{"E"},
-					id:                     "N",
-					expectedScore:          2,
-					expectedSelectedParent: "E",
-					expectedBlues:          []string{"E"},
-				},
-				{
-					parents:                []string{"F", "G", "J"},
-					id:                     "O",
-					expectedScore:          5,
-					expectedSelectedParent: "F",
-					expectedBlues:          []string{"J", "G", "F"},
-				},
-				{
-					parents:                []string{"B", "M", "I"},
-					id:                     "P",
-					expectedScore:          6,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"M", "I", "E", "C", "B"},
-				},
-				{
-					parents:                []string{"K", "E"},
-					id:                     "Q",
-					expectedScore:          4,
-					expectedSelectedParent: "E",
-					expectedBlues:          []string{"K", "D", "E"},
-				},
-				{
-					parents:                []string{"L", "N"},
-					id:                     "R",
-					expectedScore:          3,
-					expectedSelectedParent: "L",
-					expectedBlues:          []string{"L"},
-				},
-				{
-					parents:                []string{"I", "Q"},
-					id:                     "S",
-					expectedScore:          5,
-					expectedSelectedParent: "Q",
-					expectedBlues:          []string{"Q"},
-				},
-				{
-					parents:                []string{"K", "P"},
-					id:                     "T",
-					expectedScore:          7,
-					expectedSelectedParent: "P",
-					expectedBlues:          []string{"P"},
-				},
-				{
-					parents:                []string{"K", "L"},
-					id:                     "U",
-					expectedScore:          4,
-					expectedSelectedParent: "K",
-					expectedBlues:          []string{"L", "K"},
-				},
-				{
-					parents:                []string{"U", "R"},
-					id:                     "V",
-					expectedScore:          5,
-					expectedSelectedParent: "R",
-					expectedBlues:          []string{"U", "R"},
-				},
-				{
-					parents:                []string{"S", "U", "T"},
-					id:                     "W",
-					expectedScore:          8,
-					expectedSelectedParent: "T",
-					expectedBlues:          []string{"T"},
-				},
-				{
-					parents:                []string{"V", "W", "H"},
-					id:                     "X",
-					expectedScore:          9,
-					expectedSelectedParent: "W",
-					expectedBlues:          []string{"W"},
-				},
-			},
-		},
-		{
-			//Secret mining attack: The attacker is mining
-			//blocks B,C,D,E,F,G,T in secret without propagating
-			//them, so all blocks except T should be red, because
-			//they don't follow the rules of PHANTOM that require
-			//you to point to all the parents that you know, and
-			//propagate your block as soon as it's mined
-
-			//Block hash order:AYXWVUTSRQPONMLKJIHGFEDCB
-			k:              1,
-			virtualBlockID: "Y",
-			expectedReds:   []string{"B", "C", "D", "E", "F", "G", "L"},
-			dagData: []*testBlockData{
-				{
-					parents:                []string{"A"},
-					id:                     "B",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "C",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"C"},
-					id:                     "D",
-					expectedScore:          3,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"C"},
-				},
-				{
-					parents:                []string{"D"},
-					id:                     "E",
-					expectedScore:          4,
-					expectedSelectedParent: "D",
-					expectedBlues:          []string{"D"},
-				},
-				{
-					parents:                []string{"E"},
-					id:                     "F",
-					expectedScore:          5,
-					expectedSelectedParent: "E",
-					expectedBlues:          []string{"E"},
-				},
-				{
-					parents:                []string{"F"},
-					id:                     "G",
-					expectedScore:          6,
-					expectedSelectedParent: "F",
-					expectedBlues:          []string{"F"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "H",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "I",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"H", "I"},
-					id:                     "J",
-					expectedScore:          3,
-					expectedSelectedParent: "H",
-					expectedBlues:          []string{"I", "H"},
-				},
-				{
-					parents:                []string{"H", "I"},
-					id:                     "K",
-					expectedScore:          3,
-					expectedSelectedParent: "H",
-					expectedBlues:          []string{"I", "H"},
-				},
-				{
-					parents:                []string{"I"},
-					id:                     "L",
-					expectedScore:          2,
-					expectedSelectedParent: "I",
-					expectedBlues:          []string{"I"},
-				},
-				{
-					parents:                []string{"J", "K", "L"},
-					id:                     "M",
-					expectedScore:          5,
-					expectedSelectedParent: "J",
-					expectedBlues:          []string{"K", "J"},
-				},
-				{
-					parents:                []string{"J", "K", "L"},
-					id:                     "N",
-					expectedScore:          5,
-					expectedSelectedParent: "J",
-					expectedBlues:          []string{"K", "J"},
-				},
-				{
-					parents:                []string{"N", "M"},
-					id:                     "O",
-					expectedScore:          7,
-					expectedSelectedParent: "M",
-					expectedBlues:          []string{"N", "M"},
-				},
-				{
-					parents:                []string{"N", "M"},
-					id:                     "P",
-					expectedScore:          7,
-					expectedSelectedParent: "M",
-					expectedBlues:          []string{"N", "M"},
-				},
-				{
-					parents:                []string{"N", "M"},
-					id:                     "Q",
-					expectedScore:          7,
-					expectedSelectedParent: "M",
-					expectedBlues:          []string{"N", "M"},
-				},
-				{
-					parents:                []string{"O", "P", "Q"},
-					id:                     "R",
-					expectedScore:          10,
-					expectedSelectedParent: "O",
-					expectedBlues:          []string{"Q", "P", "O"},
-				},
-				{
-					parents:                []string{"O", "P", "Q"},
-					id:                     "S",
-					expectedScore:          10,
-					expectedSelectedParent: "O",
-					expectedBlues:          []string{"Q", "P", "O"},
-				},
-				{
-					parents:                []string{"G", "S", "R"},
-					id:                     "T",
-					expectedScore:          12,
-					expectedSelectedParent: "R",
-					expectedBlues:          []string{"S", "R"},
-				},
-				{
-					parents:                []string{"S", "R"},
-					id:                     "U",
-					expectedScore:          12,
-					expectedSelectedParent: "R",
-					expectedBlues:          []string{"S", "R"},
-				},
-				{
-					parents:                []string{"T", "U"},
-					id:                     "V",
-					expectedScore:          14,
-					expectedSelectedParent: "T",
-					expectedBlues:          []string{"U", "T"},
-				},
-				{
-					parents:                []string{"T", "U"},
-					id:                     "W",
-					expectedScore:          14,
-					expectedSelectedParent: "T",
-					expectedBlues:          []string{"U", "T"},
-				},
-				{
-					parents:                []string{"U", "T"},
-					id:                     "X",
-					expectedScore:          14,
-					expectedSelectedParent: "T",
-					expectedBlues:          []string{"U", "T"},
-				},
-				{
-					parents:                []string{"V", "W", "X"},
-					id:                     "Y",
-					expectedScore:          17,
-					expectedSelectedParent: "V",
-					expectedBlues:          []string{"X", "W", "V"},
-				},
-			},
-		},
-		{
-			//Censorship mining attack: The attacker is mining blocks B,C,D,E,F,G in secret without propagating them,
-			//so all blocks except B and C should be red, because they don't follow the rules of
-			//PHANTOM that require you to point to all the parents that you know
-
-			//Block hash order:AYXWVUTSRQPONMLKJIHGFEDCB
-			k:              1,
-			virtualBlockID: "Y",
-			expectedReds:   []string{"D", "E", "F", "G", "L"},
-			dagData: []*testBlockData{
-				{
-					parents:                []string{"A"},
-					id:                     "B",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"B"},
-					id:                     "C",
-					expectedScore:          2,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"B"},
-				},
-				{
-					parents:                []string{"C"},
-					id:                     "D",
-					expectedScore:          3,
-					expectedSelectedParent: "C",
-					expectedBlues:          []string{"C"},
-				},
-				{
-					parents:                []string{"D"},
-					id:                     "E",
-					expectedScore:          4,
-					expectedSelectedParent: "D",
-					expectedBlues:          []string{"D"},
-				},
-				{
-					parents:                []string{"E"},
-					id:                     "F",
-					expectedScore:          5,
-					expectedSelectedParent: "E",
-					expectedBlues:          []string{"E"},
-				},
-				{
-					parents:                []string{"F"},
-					id:                     "G",
-					expectedScore:          6,
-					expectedSelectedParent: "F",
-					expectedBlues:          []string{"F"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "H",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"A"},
-					id:                     "I",
-					expectedScore:          1,
-					expectedSelectedParent: "A",
-					expectedBlues:          []string{"A"},
-				},
-				{
-					parents:                []string{"H", "I", "B"},
-					id:                     "J",
-					expectedScore:          4,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"I", "H", "B"},
-				},
-				{
-					parents:                []string{"H", "I", "B"},
-					id:                     "K",
-					expectedScore:          4,
-					expectedSelectedParent: "B",
-					expectedBlues:          []string{"I", "H", "B"},
-				},
-				{
-					parents:                []string{"I"},
-					id:                     "L",
-					expectedScore:          2,
-					expectedSelectedParent: "I",
-					expectedBlues:          []string{"I"},
-				},
-				{
-					parents:                []string{"J", "K", "L", "C"},
-					id:                     "M",
-					expectedScore:          7,
-					expectedSelectedParent: "J",
-					expectedBlues:          []string{"K", "C", "J"},
-				},
-				{
-					parents:                []string{"J", "K", "L", "C"},
-					id:                     "N",
-					expectedScore:          7,
-					expectedSelectedParent: "J",
-					expectedBlues:          []string{"K", "C", "J"},
-				},
-				{
-					parents:                []string{"N", "M", "D"},
-					id:                     "O",
-					expectedScore:          9,
-					expectedSelectedParent: "M",
-					expectedBlues:          []string{"N", "M"},
-				},
-				{
-					parents:                []string{"N", "M", "D"},
-					id:                     "P",
-					expectedScore:          9,
-					expectedSelectedParent: "M",
-					expectedBlues:          []string{"N", "M"},
-				},
-				{
-					parents:                []string{"N", "M", "D"},
-					id:                     "Q",
-					expectedScore:          9,
-					expectedSelectedParent: "M",
-					expectedBlues:          []string{"N", "M"},
-				},
-				{
-					parents:                []string{"O", "P", "Q", "E"},
-					id:                     "R",
-					expectedScore:          12,
-					expectedSelectedParent: "O",
-					expectedBlues:          []string{"Q", "P", "O"},
-				},
-				{
-					parents:                []string{"O", "P", "Q", "E"},
-					id:                     "S",
-					expectedScore:          12,
-					expectedSelectedParent: "O",
-					expectedBlues:          []string{"Q", "P", "O"},
-				},
-				{
-					parents:                []string{"G", "S", "R"},
-					id:                     "T",
-					expectedScore:          14,
-					expectedSelectedParent: "R",
-					expectedBlues:          []string{"S", "R"},
-				},
-				{
-					parents:                []string{"S", "R", "F"},
-					id:                     "U",
-					expectedScore:          14,
-					expectedSelectedParent: "R",
-					expectedBlues:          []string{"S", "R"},
-				},
-				{
-					parents:                []string{"T", "U"},
-					id:                     "V",
-					expectedScore:          16,
-					expectedSelectedParent: "T",
-					expectedBlues:          []string{"U", "T"},
-				},
-				{
-					parents:                []string{"T", "U"},
-					id:                     "W",
-					expectedScore:          16,
-					expectedSelectedParent: "T",
-					expectedBlues:          []string{"U", "T"},
-				},
-				{
-					parents:                []string{"T", "U"},
-					id:                     "X",
-					expectedScore:          16,
-					expectedSelectedParent: "T",
-					expectedBlues:          []string{"U", "T"},
-				},
-				{
-					parents:                []string{"V", "W", "X"},
-					id:                     "Y",
-					expectedScore:          19,
-					expectedSelectedParent: "V",
-					expectedBlues:          []string{"X", "W", "V"},
-				},
-			},
-		},
-	}
-
-	for i, test := range tests {
-		netParams.K = test.k
-		// Generate enough synthetic blocks for the rest of the test
-		blockDAG := newTestDAG(&netParams)
-		genesisNode := blockDAG.genesis
-		blockTime := genesisNode.Header().Timestamp
-		blockByIDMap := make(map[string]*blockNode)
-		idByBlockMap := make(map[*blockNode]string)
-		blockByIDMap["A"] = genesisNode
-		idByBlockMap[genesisNode] = "A"
-
-		for _, blockData := range test.dagData {
-			blockTime = blockTime.Add(time.Second)
-			parents := blockSet{}
-			for _, parentID := range blockData.parents {
-				parent := blockByIDMap[parentID]
-				parents.add(parent)
-			}
-			node := newTestNode(parents, blockVersion, 0, blockTime, test.k)
-			node.hash = &daghash.Hash{} //It helps to predict hash order
-			for i, char := range blockData.id {
-				node.hash[i] = byte(char)
-			}
-
-			blockDAG.index.AddNode(node)
-			addNodeAsChildToParents(node)
-
-			blockByIDMap[blockData.id] = node
-			idByBlockMap[node] = blockData.id
-
-			bluesIDs := make([]string, 0, len(node.blues))
-			for _, blue := range node.blues {
-				bluesIDs = append(bluesIDs, idByBlockMap[blue])
-			}
-			selectedParentID := idByBlockMap[node.selectedParent]
-			fullDataStr := fmt.Sprintf("blues: %v, selectedParent: %v, score: %v",
-				bluesIDs, selectedParentID, node.blueScore)
-			if blockData.expectedScore != node.blueScore {
-				t.Errorf("Test %d: Block %v expected to have score %v but got %v (fulldata: %v)",
-					i, blockData.id, blockData.expectedScore, node.blueScore, fullDataStr)
-			}
-			if blockData.expectedSelectedParent != selectedParentID {
-				t.Errorf("Test %d: Block %v expected to have selected parent %v but got %v (fulldata: %v)",
-					i, blockData.id, blockData.expectedSelectedParent, selectedParentID, fullDataStr)
-			}
-			if !reflect.DeepEqual(blockData.expectedBlues, bluesIDs) {
-				t.Errorf("Test %d: Block %v expected to have blues %v but got %v (fulldata: %v)",
-					i, blockData.id, blockData.expectedBlues, bluesIDs, fullDataStr)
-			}
-		}
-
-		reds := make(map[string]bool)
-
-		for id := range blockByIDMap {
-			reds[id] = true
-		}
-
-		for tip := blockByIDMap[test.virtualBlockID]; tip.selectedParent != nil; tip = tip.selectedParent {
-			tipID := idByBlockMap[tip]
-			delete(reds, tipID)
-			for _, blue := range tip.blues {
-				blueID := idByBlockMap[blue]
-				delete(reds, blueID)
-			}
-		}
-		if !checkReds(test.expectedReds, reds) {
-			redsIDs := make([]string, 0, len(reds))
-			for id := range reds {
-				redsIDs = append(redsIDs, id)
-			}
-			sort.Strings(redsIDs)
-			sort.Strings(test.expectedReds)
-			t.Errorf("Test %d: Expected reds %v but got %v", i, test.expectedReds, redsIDs)
-		}
-
-	}
-}
-
-func checkReds(expectedReds []string, reds map[string]bool) bool {
-	if len(expectedReds) != len(reds) {
-		return false
-	}
-	for _, redID := range expectedReds {
-		if !reds[redID] {
-			return false
-		}
-	}
-	return true
-}

blockdag/process.go

@@ -1,214 +0,0 @@
-// Copyright (c) 2013-2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"fmt"
-	"time"
-
-	"github.com/daglabs/btcd/util"
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-// BehaviorFlags is a bitmask defining tweaks to the normal behavior when
-// performing DAG processing and consensus rules checks.
-type BehaviorFlags uint32
-
-const (
-	// BFFastAdd may be set to indicate that several checks can be avoided
-	// for the block since it is already known to fit into the chain due to
-	// already proving it correct links into the chain up to a known
-	// checkpoint.  This is primarily used for headers-first mode.
-	BFFastAdd BehaviorFlags = 1 << iota
-
-	// BFNoPoWCheck may be set to indicate the proof of work check which
-	// ensures a block hashes to a value less than the required target will
-	// not be performed.
-	BFNoPoWCheck
-
-	// BFWasUnorphaned may be set to indicate that a block was just now
-	// unorphaned
-	BFWasUnorphaned
-
-	// BFAfterDelay may be set to indicate that a block had timestamp too far
-	// in the future, just finished the delay
-	BFAfterDelay
-
-	// BFIsSync may be set to indicate that the block was sent as part of the
-	// netsync process
-	BFIsSync
-
-	// BFWasStored is set to indicate that the block was previously stored
-	// in the block index but was never fully processed
-	BFWasStored
-
-	// BFNone is a convenience value to specifically indicate no flags.
-	BFNone BehaviorFlags = 0
-)
-
-// BlockExists determines whether a block with the given hash exists in
-// the DAG.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) BlockExists(hash *daghash.Hash) bool {
-	return dag.index.HaveBlock(hash)
-}
-
-// processOrphans determines if there are any orphans which depend on the passed
-// block hash (they are no longer orphans if true) and potentially accepts them.
-// It repeats the process for the newly accepted blocks (to detect further
-// orphans which may no longer be orphans) until there are no more.
-//
-// The flags do not modify the behavior of this function directly, however they
-// are needed to pass along to maybeAcceptBlock.
-//
-// This function MUST be called with the chain state lock held (for writes).
-func (dag *BlockDAG) processOrphans(hash *daghash.Hash, flags BehaviorFlags) error {
-	// Start with processing at least the passed hash.  Leave a little room
-	// for additional orphan blocks that need to be processed without
-	// needing to grow the array in the common case.
-	processHashes := make([]*daghash.Hash, 0, 10)
-	processHashes = append(processHashes, hash)
-	for len(processHashes) > 0 {
-		// Pop the first hash to process from the slice.
-		processHash := processHashes[0]
-		processHashes[0] = nil // Prevent GC leak.
-		processHashes = processHashes[1:]
-
-		// Look up all orphans that are parented by the block we just
-		// accepted.  This will typically only be one, but it could
-		// be multiple if multiple blocks are mined and broadcast
-		// around the same time.  The one with the most proof of work
-		// will eventually win out.  An indexing for loop is
-		// intentionally used over a range here as range does not
-		// reevaluate the slice on each iteration nor does it adjust the
-		// index for the modified slice.
-		for i := 0; i < len(dag.prevOrphans[*processHash]); i++ {
-			orphan := dag.prevOrphans[*processHash][i]
-			if orphan == nil {
-				log.Warnf("Found a nil entry at index %d in the "+
-					"orphan dependency list for block %s", i,
-					processHash)
-				continue
-			}
-
-			// Skip this orphan if one or more of its parents are
-			// still missing.
-			_, err := lookupParentNodes(orphan.block, dag)
-			if err != nil {
-				if ruleErr, ok := err.(RuleError); ok && ruleErr.ErrorCode == ErrParentBlockUnknown {
-					continue
-				}
-				return err
-			}
-
-			// Remove the orphan from the orphan pool.
-			orphanHash := orphan.block.Hash()
-			dag.removeOrphanBlock(orphan)
-			i--
-
-			// Potentially accept the block into the block DAG.
-			err = dag.maybeAcceptBlock(orphan.block, flags|BFWasUnorphaned)
-			if err != nil {
-				return err
-			}
-
-			// Add this block to the list of blocks to process so
-			// any orphan blocks that depend on this block are
-			// handled too.
-			processHashes = append(processHashes, orphanHash)
-		}
-	}
-	return nil
-}
-
-// ProcessBlock is the main workhorse for handling insertion of new blocks into
-// the block chain.  It includes functionality such as rejecting duplicate
-// blocks, ensuring blocks follow all rules, orphan handling, and insertion into
-// the block DAG.
-//
-// When no errors occurred during processing, the first return value indicates
-// whether or not the block is an orphan.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) ProcessBlock(block *util.Block, flags BehaviorFlags) (isOrphan bool, delay time.Duration, err error) {
-	dag.dagLock.Lock()
-	defer dag.dagLock.Unlock()
-
-	isDelayedBlock := flags&BFAfterDelay == BFAfterDelay
-	wasBlockStored := flags&BFWasStored == BFWasStored
-
-	blockHash := block.Hash()
-	log.Tracef("Processing block %s", blockHash)
-
-	// The block must not already exist in the DAG.
-	if dag.BlockExists(blockHash) && !wasBlockStored {
-		str := fmt.Sprintf("already have block %s", blockHash)
-		return false, 0, ruleError(ErrDuplicateBlock, str)
-	}
-
-	// The block must not already exist as an orphan.
-	if _, exists := dag.orphans[*blockHash]; exists {
-		str := fmt.Sprintf("already have block (orphan) %s", blockHash)
-		return false, 0, ruleError(ErrDuplicateBlock, str)
-	}
-
-	if !isDelayedBlock {
-		// Perform preliminary sanity checks on the block and its transactions.
-		delay, err := dag.checkBlockSanity(block, flags)
-		if err != nil {
-			return false, 0, err
-		}
-
-		if delay != 0 {
-			return false, delay, err
-		}
-	}
-
-	// Handle orphan blocks.
-	allParentsExist := true
-	for _, parentHash := range block.MsgBlock().Header.ParentHashes {
-		if !dag.BlockExists(parentHash) {
-			allParentsExist = false
-		}
-	}
-
-	if !allParentsExist {
-		// Some orphans during netsync are a normal part of the process, since the anticone
-		// of the chain-split is never explicitly requested.
-		// Therefore, if we are during netsync - don't report orphans to default logs.
-		//
-		// The number K*2 was chosen since in peace times anticone is limited to K blocks,
-		// while some red block can make it a bit bigger, but much more than that indicates
-		// there might be some problem with the netsync process.
-		if flags&BFIsSync == BFIsSync && uint32(len(dag.orphans)) < dag.dagParams.K*2 {
-			log.Debugf("Adding orphan block %s. This is normal part of netsync process", blockHash)
-		} else {
-			log.Infof("Adding orphan block %s", blockHash)
-		}
-		dag.addOrphanBlock(block)
-
-		return true, 0, nil
-	}
-
-	// The block has passed all context independent checks and appears sane
-	// enough to potentially accept it into the block DAG.
-	err = dag.maybeAcceptBlock(block, flags)
-	if err != nil {
-		return false, 0, err
-	}
-
-	// Accept any orphan blocks that depend on this block (they are
-	// no longer orphans) and repeat for those accepted blocks until
-	// there are no more.
-	err = dag.processOrphans(blockHash, flags)
-	if err != nil {
-		return false, 0, err
-	}
-
-	log.Debugf("Accepted block %s", blockHash)
-
-	return false, 0, nil
-}

blockdag/process_test.go

@@ -1,67 +0,0 @@
-package blockdag
-
-import (
-	"bou.ke/monkey"
-	"fmt"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/util"
-	"testing"
-	"time"
-)
-
-func TestProcessBlock(t *testing.T) {
-	dag, teardownFunc, err := DAGSetup("TestProcessBlock", Config{
-		DAGParams: &dagconfig.SimNetParams,
-	})
-	if err != nil {
-		t.Errorf("Failed to setup dag instance: %v", err)
-		return
-	}
-	defer teardownFunc()
-
-	// Check that BFAfterDelay skip checkBlockSanity
-	called := false
-	guard := monkey.Patch((*BlockDAG).checkBlockSanity, func(_ *BlockDAG, _ *util.Block, _ BehaviorFlags) (time.Duration, error) {
-		called = true
-		return 0, nil
-	})
-	defer guard.Unpatch()
-
-	isOrphan, delay, err := dag.ProcessBlock(util.NewBlock(&Block100000), BFNoPoWCheck)
-	if err != nil {
-		t.Errorf("ProcessBlock: %s", err)
-	}
-	if delay != 0 {
-		t.Errorf("ProcessBlock: block is too far in the future")
-	}
-	if !isOrphan {
-		t.Errorf("ProcessBlock: unexpected returned non orphan block")
-	}
-	if !called {
-		t.Errorf("ProcessBlock: expected checkBlockSanity to be called")
-	}
-
-	Block100000Copy := Block100000
-	// Change nonce to change block hash
-	Block100000Copy.Header.Nonce++
-	called = false
-	isOrphan, delay, err = dag.ProcessBlock(util.NewBlock(&Block100000Copy), BFAfterDelay|BFNoPoWCheck)
-	if err != nil {
-		t.Errorf("ProcessBlock: %s", err)
-	}
-	if delay != 0 {
-		t.Errorf("ProcessBlock: block is too far in the future")
-	}
-	if !isOrphan {
-		t.Errorf("ProcessBlock: unexpected returned non orphan block")
-	}
-	if called {
-		t.Errorf("ProcessBlock: Didn't expected checkBlockSanity to be called")
-	}
-
-	isOrphan, delay, err = dag.ProcessBlock(util.NewBlock(dagconfig.SimNetParams.GenesisBlock), BFNone)
-	expectedErrMsg := fmt.Sprintf("already have block %s", dagconfig.SimNetParams.GenesisHash)
-	if err == nil || err.Error() != expectedErrMsg {
-		t.Errorf("ProcessBlock: Expected error \"%s\" but got \"%s\"", expectedErrMsg, err)
-	}
-}

blockdag/subnetworks.go

@@ -1,193 +0,0 @@
-package blockdag
-
-import (
-	"bytes"
-	"encoding/binary"
-	"fmt"
-
-	"github.com/daglabs/btcd/util"
-
-	"github.com/daglabs/btcd/database"
-	"github.com/daglabs/btcd/util/subnetworkid"
-	"github.com/daglabs/btcd/wire"
-)
-
-// SubnetworkStore stores the subnetworks data
-type SubnetworkStore struct {
-	db database.DB
-}
-
-func newSubnetworkStore(db database.DB) *SubnetworkStore {
-	return &SubnetworkStore{
-		db: db,
-	}
-}
-
-// registerSubnetworks scans a list of transactions, singles out
-// subnetwork registry transactions, validates them, and registers a new
-// subnetwork based on it.
-// This function returns an error if one or more transactions are invalid
-func registerSubnetworks(dbTx database.Tx, txs []*util.Tx) error {
-	subnetworkRegistryTxs := make([]*wire.MsgTx, 0)
-	for _, tx := range txs {
-		msgTx := tx.MsgTx()
-
-		if msgTx.SubnetworkID.IsEqual(subnetworkid.SubnetworkIDRegistry) {
-			subnetworkRegistryTxs = append(subnetworkRegistryTxs, msgTx)
-		}
-
-		if subnetworkid.Less(subnetworkid.SubnetworkIDRegistry, &msgTx.SubnetworkID) {
-			// Transactions are ordered by subnetwork, so we can safely assume
-			// that the rest of the transactions will not be subnetwork registry
-			// transactions.
-			break
-		}
-	}
-
-	for _, registryTx := range subnetworkRegistryTxs {
-		subnetworkID, err := TxToSubnetworkID(registryTx)
-		if err != nil {
-			return err
-		}
-		sNet, err := dbGetSubnetwork(dbTx, subnetworkID)
-		if err != nil {
-			return err
-		}
-		if sNet == nil {
-			createdSubnetwork := newSubnetwork(registryTx)
-			err := dbRegisterSubnetwork(dbTx, subnetworkID, createdSubnetwork)
-			if err != nil {
-				return fmt.Errorf("failed registering subnetwork"+
-					"for tx '%s': %s", registryTx.TxHash(), err)
-			}
-		}
-	}
-
-	return nil
-}
-
-// validateSubnetworkRegistryTransaction makes sure that a given subnetwork registry
-// transaction is valid. Such a transaction is valid iff:
-// - Its entire payload is a uint64 (8 bytes)
-func validateSubnetworkRegistryTransaction(tx *wire.MsgTx) error {
-	if len(tx.Payload) != 8 {
-		return ruleError(ErrSubnetworkRegistry, fmt.Sprintf("validation failed: subnetwork registry"+
-			"tx '%s' has an invalid payload", tx.TxHash()))
-	}
-
-	return nil
-}
-
-// TxToSubnetworkID creates a subnetwork ID from a subnetwork registry transaction
-func TxToSubnetworkID(tx *wire.MsgTx) (*subnetworkid.SubnetworkID, error) {
-	txHash := tx.TxHash()
-	return subnetworkid.New(util.Hash160(txHash[:]))
-}
-
-// subnetwork returns a registered subnetwork. If the subnetwork does not exist
-// this method returns an error.
-func (s *SubnetworkStore) subnetwork(subnetworkID *subnetworkid.SubnetworkID) (*subnetwork, error) {
-	var sNet *subnetwork
-	var err error
-	dbErr := s.db.View(func(dbTx database.Tx) error {
-		sNet, err = dbGetSubnetwork(dbTx, subnetworkID)
-		return nil
-	})
-	if dbErr != nil {
-		return nil, fmt.Errorf("could not retrieve subnetwork '%d': %s", subnetworkID, dbErr)
-	}
-	if err != nil {
-		return nil, fmt.Errorf("could not retrieve subnetwork '%d': %s", subnetworkID, err)
-	}
-
-	return sNet, nil
-}
-
-// GasLimit returns the gas limit of a registered subnetwork. If the subnetwork does not
-// exist this method returns an error.
-func (s *SubnetworkStore) GasLimit(subnetworkID *subnetworkid.SubnetworkID) (uint64, error) {
-	sNet, err := s.subnetwork(subnetworkID)
-	if err != nil {
-		return 0, err
-	}
-	if sNet == nil {
-		return 0, fmt.Errorf("subnetwork '%s' not found", subnetworkID)
-	}
-
-	return sNet.gasLimit, nil
-}
-
-// dbRegisterSubnetwork stores mappings from ID of the subnetwork to the subnetwork data.
-func dbRegisterSubnetwork(dbTx database.Tx, subnetworkID *subnetworkid.SubnetworkID, network *subnetwork) error {
-	// Serialize the subnetwork
-	serializedSubnetwork, err := serializeSubnetwork(network)
-	if err != nil {
-		return fmt.Errorf("failed to serialize sub-netowrk '%s': %s", subnetworkID, err)
-	}
-
-	// Store the subnetwork
-	subnetworksBucket := dbTx.Metadata().Bucket(subnetworksBucketName)
-	err = subnetworksBucket.Put(subnetworkID[:], serializedSubnetwork)
-	if err != nil {
-		return fmt.Errorf("failed to write sub-netowrk '%s': %s", subnetworkID, err)
-	}
-
-	return nil
-}
-
-// dbGetSubnetwork returns the subnetwork associated with subnetworkID or nil if the subnetwork was not found.
-func dbGetSubnetwork(dbTx database.Tx, subnetworkID *subnetworkid.SubnetworkID) (*subnetwork, error) {
-	bucket := dbTx.Metadata().Bucket(subnetworksBucketName)
-	serializedSubnetwork := bucket.Get(subnetworkID[:])
-	if serializedSubnetwork == nil {
-		return nil, nil
-	}
-
-	return deserializeSubnetwork(serializedSubnetwork)
-}
-
-type subnetwork struct {
-	gasLimit uint64
-}
-
-func newSubnetwork(tx *wire.MsgTx) *subnetwork {
-	return &subnetwork{
-		gasLimit: ExtractGasLimit(tx),
-	}
-}
-
-// ExtractGasLimit extracts the gas limit from the transaction payload
-func ExtractGasLimit(tx *wire.MsgTx) uint64 {
-	return binary.LittleEndian.Uint64(tx.Payload[:8])
-}
-
-// serializeSubnetwork serializes a subnetwork into the following binary format:
-// | gasLimit (8 bytes) |
-func serializeSubnetwork(sNet *subnetwork) ([]byte, error) {
-	serializedSNet := bytes.NewBuffer(make([]byte, 0, 8))
-
-	// Write the gas limit
-	err := binary.Write(serializedSNet, byteOrder, sNet.gasLimit)
-	if err != nil {
-		return nil, fmt.Errorf("failed to serialize subnetwork: %s", err)
-	}
-
-	return serializedSNet.Bytes(), nil
-}
-
-// deserializeSubnetwork deserializes a byte slice into a subnetwork.
-// See serializeSubnetwork for the binary format.
-func deserializeSubnetwork(serializedSNetBytes []byte) (*subnetwork, error) {
-	serializedSNet := bytes.NewBuffer(serializedSNetBytes)
-
-	// Read the gas limit
-	var gasLimit uint64
-	err := binary.Read(serializedSNet, byteOrder, &gasLimit)
-	if err != nil {
-		return nil, fmt.Errorf("failed to deserialize subnetwork: %s", err)
-	}
-
-	return &subnetwork{
-		gasLimit: gasLimit,
-	}, nil
-}

blockdag/test_utils.go

@@ -1,262 +0,0 @@
-package blockdag
-
-// This file functions are not considered safe for regular use, and should be used for test purposes only.
-
-import (
-	"compress/bzip2"
-	"encoding/binary"
-	"fmt"
-	"github.com/daglabs/btcd/util"
-	"io"
-	"os"
-	"path/filepath"
-	"strings"
-	"sync"
-
-	"github.com/daglabs/btcd/util/subnetworkid"
-
-	"github.com/daglabs/btcd/database"
-	_ "github.com/daglabs/btcd/database/ffldb" // blank import ffldb so that its init() function runs before tests
-	"github.com/daglabs/btcd/txscript"
-	"github.com/daglabs/btcd/util/daghash"
-	"github.com/daglabs/btcd/wire"
-)
-
-const (
-	// testDbType is the database backend type to use for the tests.
-	testDbType = "ffldb"
-
-	// testDbRoot is the root directory used to create all test databases.
-	testDbRoot = "testdbs"
-
-	// blockDataNet is the expected network in the test block data.
-	blockDataNet = wire.MainNet
-)
-
-// isSupportedDbType returns whether or not the passed database type is
-// currently supported.
-func isSupportedDbType(dbType string) bool {
-	supportedDrivers := database.SupportedDrivers()
-	for _, driver := range supportedDrivers {
-		if dbType == driver {
-			return true
-		}
-	}
-
-	return false
-}
-
-// FileExists returns whether or not the named file or directory exists.
-func FileExists(name string) bool {
-	if _, err := os.Stat(name); err != nil {
-		if os.IsNotExist(err) {
-			return false
-		}
-	}
-	return true
-}
-
-// DAGSetup is used to create a new db and chain instance with the genesis
-// block already inserted.  In addition to the new chain instance, it returns
-// a teardown function the caller should invoke when done testing to clean up.
-func DAGSetup(dbName string, config Config) (*BlockDAG, func(), error) {
-	if !isSupportedDbType(testDbType) {
-		return nil, nil, fmt.Errorf("unsupported db type %s", testDbType)
-	}
-
-	var teardown func()
-
-	// To make sure that the teardown function is not called before any goroutines finished to run -
-	// overwrite `spawn` to count the number of running goroutines
-	spawnWaitGroup := sync.WaitGroup{}
-	realSpawn := spawn
-	spawn = func(f func()) {
-		spawnWaitGroup.Add(1)
-		realSpawn(func() {
-			f()
-			spawnWaitGroup.Done()
-		})
-	}
-
-	if config.DB == nil {
-		// Create the root directory for test databases.
-		if !FileExists(testDbRoot) {
-			if err := os.MkdirAll(testDbRoot, 0700); err != nil {
-				err := fmt.Errorf("unable to create test db "+
-					"root: %s", err)
-				return nil, nil, err
-			}
-		}
-
-		dbPath := filepath.Join(testDbRoot, dbName)
-		_ = os.RemoveAll(dbPath)
-		var err error
-		config.DB, err = database.Create(testDbType, dbPath, blockDataNet)
-		if err != nil {
-			return nil, nil, fmt.Errorf("error creating db: %s", err)
-		}
-
-		// Setup a teardown function for cleaning up.  This function is
-		// returned to the caller to be invoked when it is done testing.
-		teardown = func() {
-			spawnWaitGroup.Wait()
-			spawn = realSpawn
-			config.DB.Close()
-			os.RemoveAll(dbPath)
-			os.RemoveAll(testDbRoot)
-		}
-	} else {
-		teardown = func() {
-			spawnWaitGroup.Wait()
-			spawn = realSpawn
-			config.DB.Close()
-		}
-	}
-
-	config.TimeSource = NewMedianTime()
-	config.SigCache = txscript.NewSigCache(1000)
-
-	// Create the DAG instance.
-	dag, err := New(&config)
-	if err != nil {
-		teardown()
-		err := fmt.Errorf("failed to create dag instance: %s", err)
-		return nil, nil, err
-	}
-	return dag, teardown, nil
-}
-
-// OpTrueScript is script returning TRUE
-var OpTrueScript = []byte{txscript.OpTrue}
-
-type txSubnetworkData struct {
-	subnetworkID *subnetworkid.SubnetworkID
-	Gas          uint64
-	Payload      []byte
-}
-
-func createTxForTest(numInputs uint32, numOutputs uint32, outputValue uint64, subnetworkData *txSubnetworkData) *wire.MsgTx {
-	txIns := []*wire.TxIn{}
-	txOuts := []*wire.TxOut{}
-
-	for i := uint32(0); i < numInputs; i++ {
-		txIns = append(txIns, &wire.TxIn{
-			PreviousOutpoint: *wire.NewOutpoint(&daghash.TxID{}, i),
-			SignatureScript:  []byte{},
-			Sequence:         wire.MaxTxInSequenceNum,
-		})
-	}
-
-	for i := uint32(0); i < numOutputs; i++ {
-		txOuts = append(txOuts, &wire.TxOut{
-			ScriptPubKey: OpTrueScript,
-			Value:        outputValue,
-		})
-	}
-
-	if subnetworkData != nil {
-		return wire.NewSubnetworkMsgTx(wire.TxVersion, txIns, txOuts, subnetworkData.subnetworkID, subnetworkData.Gas, subnetworkData.Payload)
-	}
-
-	return wire.NewNativeMsgTx(wire.TxVersion, txIns, txOuts)
-}
-
-// VirtualForTest is an exported version for virtualBlock, so that it can be returned by exported test_util methods
-type VirtualForTest *virtualBlock
-
-// SetVirtualForTest replaces the dag's virtual block. This function is used for test purposes only
-func SetVirtualForTest(dag *BlockDAG, virtual VirtualForTest) VirtualForTest {
-	oldVirtual := dag.virtual
-	dag.virtual = virtual
-	return VirtualForTest(oldVirtual)
-}
-
-// GetVirtualFromParentsForTest generates a virtual block with the given parents.
-func GetVirtualFromParentsForTest(dag *BlockDAG, parentHashes []*daghash.Hash) (VirtualForTest, error) {
-	parents := newSet()
-	for _, hash := range parentHashes {
-		parent := dag.index.LookupNode(hash)
-		if parent == nil {
-			return nil, fmt.Errorf("GetVirtualFromParentsForTest: didn't found node for hash %s", hash)
-		}
-		parents.add(parent)
-	}
-	virtual := newVirtualBlock(parents, dag.dagParams.K)
-
-	pastUTXO, acceptanceData, err := dag.pastUTXO(&virtual.blockNode)
-	if err != nil {
-		return nil, err
-	}
-	diffFromAcceptanceData, err := virtual.blockNode.diffFromAcceptanceData(pastUTXO, acceptanceData)
-	if err != nil {
-		return nil, err
-	}
-	utxo, err := pastUTXO.WithDiff(diffFromAcceptanceData)
-	if err != nil {
-		return nil, err
-	}
-	diffUTXO := utxo.clone().(*DiffUTXOSet)
-	err = diffUTXO.meldToBase()
-	if err != nil {
-		return nil, err
-	}
-	virtual.utxoSet = diffUTXO.base
-
-	return VirtualForTest(virtual), nil
-}
-
-// LoadBlocks reads files containing bitcoin block data (gzipped but otherwise
-// in the format bitcoind writes) from disk and returns them as an array of
-// util.Block.  This is largely borrowed from the test code in btcdb.
-func LoadBlocks(filename string) (blocks []*util.Block, err error) {
-	var network = wire.MainNet
-	var dr io.Reader
-	var fi io.ReadCloser
-
-	fi, err = os.Open(filename)
-	if err != nil {
-		return
-	}
-
-	if strings.HasSuffix(filename, ".bz2") {
-		dr = bzip2.NewReader(fi)
-	} else {
-		dr = fi
-	}
-	defer fi.Close()
-
-	var block *util.Block
-
-	err = nil
-	for height := uint64(0); err == nil; height++ {
-		var rintbuf uint32
-		err = binary.Read(dr, binary.LittleEndian, &rintbuf)
-		if err == io.EOF {
-			// hit end of file at expected offset: no warning
-			height--
-			err = nil
-			break
-		}
-		if err != nil {
-			break
-		}
-		if rintbuf != uint32(network) {
-			break
-		}
-		err = binary.Read(dr, binary.LittleEndian, &rintbuf)
-		blocklen := rintbuf
-
-		rbytes := make([]byte, blocklen)
-
-		// read block
-		dr.Read(rbytes)
-
-		block, err = util.NewBlockFromBytes(rbytes)
-		if err != nil {
-			return
-		}
-		blocks = append(blocks, block)
-	}
-
-	return
-}

blockdag/test_utils_test.go

@@ -1,56 +0,0 @@
-package blockdag
-
-import (
-	"errors"
-	"os"
-	"strings"
-	"testing"
-
-	"bou.ke/monkey"
-	"github.com/daglabs/btcd/dagconfig"
-	"github.com/daglabs/btcd/database"
-)
-
-func TestIsSupportedDbType(t *testing.T) {
-	if !isSupportedDbType("ffldb") {
-		t.Errorf("ffldb should be a supported DB driver")
-	}
-	if isSupportedDbType("madeUpDb") {
-		t.Errorf("madeUpDb should not be a supported DB driver")
-	}
-}
-
-// TestDAGSetupErrors tests all error-cases in DAGSetup.
-// The non-error-cases are tested in the more general tests.
-func TestDAGSetupErrors(t *testing.T) {
-	os.RemoveAll(testDbRoot)
-	testDAGSetupErrorThroughPatching(t, "unable to create test db root: ", os.MkdirAll, func(path string, perm os.FileMode) error {
-		return errors.New("Made up error")
-	})
-
-	testDAGSetupErrorThroughPatching(t, "failed to create dag instance: ", New, func(config *Config) (*BlockDAG, error) {
-		return nil, errors.New("Made up error")
-	})
-
-	testDAGSetupErrorThroughPatching(t, "unsupported db type ", isSupportedDbType, func(dbType string) bool {
-		return false
-	})
-
-	testDAGSetupErrorThroughPatching(t, "error creating db: ", database.Create, func(dbType string, args ...interface{}) (database.DB, error) {
-		return nil, errors.New("Made up error")
-	})
-}
-
-func testDAGSetupErrorThroughPatching(t *testing.T, expectedErrorMessage string, targetFunction interface{}, replacementFunction interface{}) {
-	guard := monkey.Patch(targetFunction, replacementFunction)
-	defer guard.Unpatch()
-	_, tearDown, err := DAGSetup("TestDAGSetup", Config{
-		DAGParams: &dagconfig.MainNetParams,
-	})
-	if tearDown != nil {
-		defer tearDown()
-	}
-	if err == nil || !strings.HasPrefix(err.Error(), expectedErrorMessage) {
-		t.Errorf("DAGSetup: expected error to have prefix '%s' but got error '%v'", expectedErrorMessage, err)
-	}
-}

blockdag/thresholdstate.go

@@ -1,356 +0,0 @@
-// Copyright (c) 2016-2017 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"fmt"
-
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-// ThresholdState define the various threshold states used when voting on
-// consensus changes.
-type ThresholdState byte
-
-// These constants are used to identify specific threshold states.
-const (
-	// ThresholdDefined is the first state for each deployment and is the
-	// state for the genesis block has by definition for all deployments.
-	ThresholdDefined ThresholdState = iota
-
-	// ThresholdStarted is the state for a deployment once its start time
-	// has been reached.
-	ThresholdStarted
-
-	// ThresholdLockedIn is the state for a deployment during the retarget
-	// period which is after the ThresholdStarted state period and the
-	// number of blocks that have voted for the deployment equal or exceed
-	// the required number of votes for the deployment.
-	ThresholdLockedIn
-
-	// ThresholdActive is the state for a deployment for all blocks after a
-	// retarget period in which the deployment was in the ThresholdLockedIn
-	// state.
-	ThresholdActive
-
-	// ThresholdFailed is the state for a deployment once its expiration
-	// time has been reached and it did not reach the ThresholdLockedIn
-	// state.
-	ThresholdFailed
-
-	// numThresholdsStates is the maximum number of threshold states used in
-	// tests.
-	numThresholdsStates
-)
-
-// thresholdStateStrings is a map of ThresholdState values back to their
-// constant names for pretty printing.
-var thresholdStateStrings = map[ThresholdState]string{
-	ThresholdDefined:  "ThresholdDefined",
-	ThresholdStarted:  "ThresholdStarted",
-	ThresholdLockedIn: "ThresholdLockedIn",
-	ThresholdActive:   "ThresholdActive",
-	ThresholdFailed:   "ThresholdFailed",
-}
-
-// String returns the ThresholdState as a human-readable name.
-func (t ThresholdState) String() string {
-	if s := thresholdStateStrings[t]; s != "" {
-		return s
-	}
-	return fmt.Sprintf("Unknown ThresholdState (%d)", int(t))
-}
-
-// thresholdConditionChecker provides a generic interface that is invoked to
-// determine when a consensus rule change threshold should be changed.
-type thresholdConditionChecker interface {
-	// BeginTime returns the unix timestamp for the median block time after
-	// which voting on a rule change starts (at the next window).
-	BeginTime() uint64
-
-	// EndTime returns the unix timestamp for the median block time after
-	// which an attempted rule change fails if it has not already been
-	// locked in or activated.
-	EndTime() uint64
-
-	// RuleChangeActivationThreshold is the number of blocks for which the
-	// condition must be true in order to lock in a rule change.
-	RuleChangeActivationThreshold() uint64
-
-	// MinerConfirmationWindow is the number of blocks in each threshold
-	// state retarget window.
-	MinerConfirmationWindow() uint64
-
-	// Condition returns whether or not the rule change activation condition
-	// has been met.  This typically involves checking whether or not the
-	// bit associated with the condition is set, but can be more complex as
-	// needed.
-	Condition(*blockNode) (bool, error)
-}
-
-// thresholdStateCache provides a type to cache the threshold states of each
-// threshold window for a set of IDs.
-type thresholdStateCache struct {
-	entries map[daghash.Hash]ThresholdState
-}
-
-// Lookup returns the threshold state associated with the given hash along with
-// a boolean that indicates whether or not it is valid.
-func (c *thresholdStateCache) Lookup(hash *daghash.Hash) (ThresholdState, bool) {
-	state, ok := c.entries[*hash]
-	return state, ok
-}
-
-// Update updates the cache to contain the provided hash to threshold state
-// mapping.
-func (c *thresholdStateCache) Update(hash *daghash.Hash, state ThresholdState) {
-	c.entries[*hash] = state
-}
-
-// newThresholdCaches returns a new array of caches to be used when calculating
-// threshold states.
-func newThresholdCaches(numCaches uint32) []thresholdStateCache {
-	caches := make([]thresholdStateCache, numCaches)
-	for i := 0; i < len(caches); i++ {
-		caches[i] = thresholdStateCache{
-			entries: make(map[daghash.Hash]ThresholdState),
-		}
-	}
-	return caches
-}
-
-// thresholdState returns the current rule change threshold state for the block
-// AFTER the given node and deployment ID.  The cache is used to ensure the
-// threshold states for previous windows are only calculated once.
-//
-// This function MUST be called with the chain state lock held (for writes).
-func (dag *BlockDAG) thresholdState(prevNode *blockNode, checker thresholdConditionChecker, cache *thresholdStateCache) (ThresholdState, error) {
-	// The threshold state for the window that contains the genesis block is
-	// defined by definition.
-	confirmationWindow := checker.MinerConfirmationWindow()
-	if prevNode == nil || (prevNode.chainHeight+1) < confirmationWindow {
-		return ThresholdDefined, nil
-	}
-
-	// Get the ancestor that is the last block of the previous confirmation
-	// window in order to get its threshold state.  This can be done because
-	// the state is the same for all blocks within a given window.
-	prevNode = prevNode.SelectedAncestor(prevNode.chainHeight -
-		(prevNode.chainHeight+1)%confirmationWindow)
-
-	// Iterate backwards through each of the previous confirmation windows
-	// to find the most recently cached threshold state.
-	var neededStates []*blockNode
-	for prevNode != nil {
-		// Nothing more to do if the state of the block is already
-		// cached.
-		if _, ok := cache.Lookup(prevNode.hash); ok {
-			break
-		}
-
-		// The start and expiration times are based on the median block
-		// time, so calculate it now.
-		medianTime := prevNode.PastMedianTime(dag)
-
-		// The state is simply defined if the start time hasn't been
-		// been reached yet.
-		if uint64(medianTime.Unix()) < checker.BeginTime() {
-			cache.Update(prevNode.hash, ThresholdDefined)
-			break
-		}
-
-		// Add this node to the list of nodes that need the state
-		// calculated and cached.
-		neededStates = append(neededStates, prevNode)
-
-		// Get the ancestor that is the last block of the previous
-		// confirmation window.
-		prevNode = prevNode.RelativeAncestor(confirmationWindow)
-	}
-
-	// Start with the threshold state for the most recent confirmation
-	// window that has a cached state.
-	state := ThresholdDefined
-	if prevNode != nil {
-		var ok bool
-		state, ok = cache.Lookup(prevNode.hash)
-		if !ok {
-			return ThresholdFailed, AssertError(fmt.Sprintf(
-				"thresholdState: cache lookup failed for %s",
-				prevNode.hash))
-		}
-	}
-
-	// Since each threshold state depends on the state of the previous
-	// window, iterate starting from the oldest unknown window.
-	for neededNum := len(neededStates) - 1; neededNum >= 0; neededNum-- {
-		prevNode := neededStates[neededNum]
-
-		switch state {
-		case ThresholdDefined:
-			// The deployment of the rule change fails if it expires
-			// before it is accepted and locked in.
-			medianTime := prevNode.PastMedianTime(dag)
-			medianTimeUnix := uint64(medianTime.Unix())
-			if medianTimeUnix >= checker.EndTime() {
-				state = ThresholdFailed
-				break
-			}
-
-			// The state for the rule moves to the started state
-			// once its start time has been reached (and it hasn't
-			// already expired per the above).
-			if medianTimeUnix >= checker.BeginTime() {
-				state = ThresholdStarted
-			}
-
-		case ThresholdStarted:
-			// The deployment of the rule change fails if it expires
-			// before it is accepted and locked in.
-			medianTime := prevNode.PastMedianTime(dag)
-			if uint64(medianTime.Unix()) >= checker.EndTime() {
-				state = ThresholdFailed
-				break
-			}
-
-			// At this point, the rule change is still being voted
-			// on by the miners, so iterate backwards through the
-			// confirmation window to count all of the votes in it.
-			var count uint64
-			countNode := prevNode
-			for i := uint64(0); i < confirmationWindow; i++ {
-				condition, err := checker.Condition(countNode)
-				if err != nil {
-					return ThresholdFailed, err
-				}
-				if condition {
-					count++
-				}
-
-				// Get the previous block node.
-				countNode = countNode.selectedParent
-			}
-
-			// The state is locked in if the number of blocks in the
-			// period that voted for the rule change meets the
-			// activation threshold.
-			if count >= checker.RuleChangeActivationThreshold() {
-				state = ThresholdLockedIn
-			}
-
-		case ThresholdLockedIn:
-			// The new rule becomes active when its previous state
-			// was locked in.
-			state = ThresholdActive
-
-			// Nothing to do if the previous state is active or failed since
-			// they are both terminal states.
-		case ThresholdActive:
-		case ThresholdFailed:
-		}
-
-		// Update the cache to avoid recalculating the state in the
-		// future.
-		cache.Update(prevNode.hash, state)
-	}
-
-	return state, nil
-}
-
-// ThresholdState returns the current rule change threshold state of the given
-// deployment ID for the block AFTER the end of the current best chain.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) ThresholdState(deploymentID uint32) (ThresholdState, error) {
-	dag.dagLock.Lock()
-	state, err := dag.deploymentState(dag.selectedTip(), deploymentID)
-	dag.dagLock.Unlock()
-
-	return state, err
-}
-
-// IsDeploymentActive returns true if the target deploymentID is active, and
-// false otherwise.
-//
-// This function is safe for concurrent access.
-func (dag *BlockDAG) IsDeploymentActive(deploymentID uint32) (bool, error) {
-	dag.dagLock.Lock()
-	state, err := dag.deploymentState(dag.selectedTip(), deploymentID)
-	dag.dagLock.Unlock()
-	if err != nil {
-		return false, err
-	}
-
-	return state == ThresholdActive, nil
-}
-
-// deploymentState returns the current rule change threshold for a given
-// deploymentID. The threshold is evaluated from the point of view of the block
-// node passed in as the first argument to this method.
-//
-// It is important to note that, as the variable name indicates, this function
-// expects the block node prior to the block for which the deployment state is
-// desired.  In other words, the returned deployment state is for the block
-// AFTER the passed node.
-//
-// This function MUST be called with the chain state lock held (for writes).
-func (dag *BlockDAG) deploymentState(prevNode *blockNode, deploymentID uint32) (ThresholdState, error) {
-	if deploymentID > uint32(len(dag.dagParams.Deployments)) {
-		return ThresholdFailed, DeploymentError(deploymentID)
-	}
-
-	deployment := &dag.dagParams.Deployments[deploymentID]
-	checker := deploymentChecker{deployment: deployment, chain: dag}
-	cache := &dag.deploymentCaches[deploymentID]
-
-	return dag.thresholdState(prevNode, checker, cache)
-}
-
-// initThresholdCaches initializes the threshold state caches for each warning
-// bit and defined deployment and provides warnings if the chain is current per
-// the warnUnknownVersions and warnUnknownRuleActivations functions.
-func (dag *BlockDAG) initThresholdCaches() error {
-	// Initialize the warning and deployment caches by calculating the
-	// threshold state for each of them.  This will ensure the caches are
-	// populated and any states that needed to be recalculated due to
-	// definition changes is done now.
-	prevNode := dag.selectedTip().selectedParent
-	for bit := uint32(0); bit < vbNumBits; bit++ {
-		checker := bitConditionChecker{bit: bit, chain: dag}
-		cache := &dag.warningCaches[bit]
-		_, err := dag.thresholdState(prevNode, checker, cache)
-		if err != nil {
-			return err
-		}
-	}
-	for id := 0; id < len(dag.dagParams.Deployments); id++ {
-		deployment := &dag.dagParams.Deployments[id]
-		cache := &dag.deploymentCaches[id]
-		checker := deploymentChecker{deployment: deployment, chain: dag}
-		_, err := dag.thresholdState(prevNode, checker, cache)
-		if err != nil {
-			return err
-		}
-	}
-
-	// No warnings about unknown rules or versions until the chain is
-	// current.
-	if dag.isCurrent() {
-		// Warn if a high enough percentage of the last blocks have
-		// unexpected versions.
-		bestNode := dag.selectedTip()
-		if err := dag.warnUnknownVersions(bestNode); err != nil {
-			return err
-		}
-
-		// Warn if any unknown new rules are either about to activate or
-		// have already been activated.
-		if err := dag.warnUnknownRuleActivations(bestNode); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}

blockdag/thresholdstate_test.go

@@ -1,134 +0,0 @@
-// Copyright (c) 2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package blockdag
-
-import (
-	"testing"
-
-	"github.com/daglabs/btcd/util/daghash"
-)
-
-// TestThresholdStateStringer tests the stringized output for the
-// ThresholdState type.
-func TestThresholdStateStringer(t *testing.T) {
-	t.Parallel()
-
-	tests := []struct {
-		in   ThresholdState
-		want string
-	}{
-		{ThresholdDefined, "ThresholdDefined"},
-		{ThresholdStarted, "ThresholdStarted"},
-		{ThresholdLockedIn, "ThresholdLockedIn"},
-		{ThresholdActive, "ThresholdActive"},
-		{ThresholdFailed, "ThresholdFailed"},
-		{0xff, "Unknown ThresholdState (255)"},
-	}
-
-	// Detect additional threshold states that don't have the stringer added.
-	if len(tests)-1 != int(numThresholdsStates) {
-		t.Errorf("It appears a threshold statewas added without " +
-			"adding an associated stringer test")
-	}
-
-	t.Logf("Running %d tests", len(tests))
-	for i, test := range tests {
-		result := test.in.String()
-		if result != test.want {
-			t.Errorf("String #%d\n got: %s want: %s", i, result,
-				test.want)
-			continue
-		}
-	}
-}
-
-// TestThresholdStateCache ensure the threshold state cache works as intended
-// including adding entries, updating existing entries, and flushing.
-func TestThresholdStateCache(t *testing.T) {
-	t.Parallel()
-
-	tests := []struct {
-		name       string
-		numEntries int
-		state      ThresholdState
-	}{
-		{name: "2 entries defined", numEntries: 2, state: ThresholdDefined},
-		{name: "7 entries started", numEntries: 7, state: ThresholdStarted},
-		{name: "10 entries active", numEntries: 10, state: ThresholdActive},
-		{name: "5 entries locked in", numEntries: 5, state: ThresholdLockedIn},
-		{name: "3 entries failed", numEntries: 3, state: ThresholdFailed},
-	}
-
-nextTest:
-	for _, test := range tests {
-		cache := &newThresholdCaches(1)[0]
-		for i := 0; i < test.numEntries; i++ {
-			var hash daghash.Hash
-			hash[0] = uint8(i + 1)
-
-			// Ensure the hash isn't available in the cache already.
-			_, ok := cache.Lookup(&hash)
-			if ok {
-				t.Errorf("Lookup (%s): has entry for hash %v",
-					test.name, hash)
-				continue nextTest
-			}
-
-			// Ensure hash that was added to the cache reports it's
-			// available and the state is the expected value.
-			cache.Update(&hash, test.state)
-			state, ok := cache.Lookup(&hash)
-			if !ok {
-				t.Errorf("Lookup (%s): missing entry for hash "+
-					"%v", test.name, hash)
-				continue nextTest
-			}
-			if state != test.state {
-				t.Errorf("Lookup (%s): state mismatch - got "+
-					"%v, want %v", test.name, state,
-					test.state)
-				continue nextTest
-			}
-
-			// Ensure adding an existing hash with the same state
-			// doesn't break the existing entry.
-			cache.Update(&hash, test.state)
-			state, ok = cache.Lookup(&hash)
-			if !ok {
-				t.Errorf("Lookup (%s): missing entry after "+
-					"second add for hash %v", test.name,
-					hash)
-				continue nextTest
-			}
-			if state != test.state {
-				t.Errorf("Lookup (%s): state mismatch after "+
-					"second add - got %v, want %v",
-					test.name, state, test.state)
-				continue nextTest
-			}
-
-			// Ensure adding an existing hash with a different state
-			// updates the existing entry.
-			newState := ThresholdFailed
-			if newState == test.state {
-				newState = ThresholdStarted
-			}
-			cache.Update(&hash, newState)
-			state, ok = cache.Lookup(&hash)
-			if !ok {
-				t.Errorf("Lookup (%s): missing entry after "+
-					"state change for hash %v", test.name,
-					hash)
-				continue nextTest
-			}
-			if state != newState {
-				t.Errorf("Lookup (%s): state mismatch after "+
-					"state change - got %v, want %v",
-					test.name, state, newState)
-				continue nextTest
-			}
-		}
-	}
-}