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* [DEV-134] Implement Continuous Integration Squashed commit: [5e41d830] Dev 223 fix txindex (#100) * [DEV-201] In handleGetBlockDAGInfo calculate difficulty by the tip with the lowest bits * [DEV-202] Move VirtualBlock.GetUTXOEntry to BlockDAG * [DEV-203] Move VirtualBlock.SelectedTip() to BlockDAG * [DEV-203] Move VirtualBlock.SelectedTip() to BlockDAG * [DEV-204] Unexport VirtualBlock() and add CalcMedianTime method for DAG * [DEV-204] add explanation about difficulty in CurrentBits() comment * [DEV-204] unexport VirtualBlock type * [DEV-223] make applyUTXOChanges return pastUTXOResults * [DEV-223] add bluestxdata for current block as well * [DEV-223] re-design tx index * [DEV-223] edit txindex comments * [DEV-223] rename BluesTxData -> AcceptedTxData, and return from applyUTXOChanges only transactions that got accepted * [DEV-223] add unit test for txindex * [DEV-223] fix comments and unite blueTransaction and AcceptedTxData to one type * [DEV-223] use bucket cursor for dbFetchFirstTxRegion * [DEV-223] use the same cursor instance for dbFetchFirstTxRegion * [DEV-223] write in dbFetchFirstTxRegion's comment that it returns the first block region * [DEV-223] rename type BlueBlockTransaction to TxWithBlockHash * [DEV-223] add named returned value for applyUTXOChanges [4c95e293] [DEV-134] Made golint ignore the vendor directory. [21736dbc] [DEV-134] Renamed ExampleBlockChain_ProcessBlock to ExampleBlockDAG_ProcessBlock to satisfy go vet. [beea6486] [DEV-134] Removed pushing the built docker to a remove repository. That's unnecessary at this stage. [bee911ed] [DEV-134] Made all precompilation checks run on everything instead of only the root dir. [585f92ae] [DEV-134] Added "github.com/pkg/errors" to dep. [5f02f570] [DEV-134] -vendor-only is written with only one hyphen. [3eee7f95] [DEV-134] go vet instead of go tool vet. [0c2d4343] [DEV-134] Split all the pre-compile checks to separate lines to be able to tell which of them is failing. [780519c8] [DEV-134] Ran gofmt on everything. [8247146b] Dev 223 fix txindex (#100) * [DEV-201] In handleGetBlockDAGInfo calculate difficulty by the tip with the lowest bits * [DEV-202] Move VirtualBlock.GetUTXOEntry to BlockDAG * [DEV-203] Move VirtualBlock.SelectedTip() to BlockDAG * [DEV-203] Move VirtualBlock.SelectedTip() to BlockDAG * [DEV-204] Unexport VirtualBlock() and add CalcMedianTime method for DAG * [DEV-204] add explanation about difficulty in CurrentBits() comment * [DEV-204] unexport VirtualBlock type * [DEV-223] make applyUTXOChanges return pastUTXOResults * [DEV-223] add bluestxdata for current block as well * [DEV-223] re-design tx index * [DEV-223] edit txindex comments * [DEV-223] rename BluesTxData -> AcceptedTxData, and return from applyUTXOChanges only transactions that got accepted * [DEV-223] add unit test for txindex * [DEV-223] fix comments and unite blueTransaction and AcceptedTxData to one type * [DEV-223] use bucket cursor for dbFetchFirstTxRegion * [DEV-223] use the same cursor instance for dbFetchFirstTxRegion * [DEV-223] write in dbFetchFirstTxRegion's comment that it returns the first block region * [DEV-223] rename type BlueBlockTransaction to TxWithBlockHash * [DEV-223] add named returned value for applyUTXOChanges [bff68aa3] [DEV-134] Gave executable permission to deploy.sh [638a99d9] [DEV-134] Added jenkinsfile and deploy script. * [DEV-134] Added a robust testing script. * [DEV-134] Fixed a bash-ism. * [DEV-134] Disabled testing with coverage for now. * [DEV-134] Disabled golint and removed removing debug symbols. * [DEV-134] Disabled aligncheck. * [DEV-134] Disabled structcheck and varcheck. * [DEV-134] Added "don't inline functions" to compiler flags for testing. * [DEV-134] Made build fail if gofmt prints out anything. * [DEV-134] Fixed misleading comment. * [DEV-134] Added comments to test.sh. * [DEV-134] Renamed tm to measure_runtime and removed do_ prefixes from functions. * [DEV-134] Fixed gofmt line in build script. * [DEV-134] Fixed gofmt some more. * [DEV-134] Fixed gofmt not actually failing due to logical or.
39 lines
1.9 KiB
Go
39 lines
1.9 KiB
Go
// Copyright (c) 2014 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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/*
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Package addrmgr implements concurrency safe Bitcoin address manager.
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Address Manager Overview
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In order maintain the peer-to-peer Bitcoin network, there needs to be a source
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of addresses to connect to as nodes come and go. The Bitcoin protocol provides
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the getaddr and addr messages to allow peers to communicate known addresses with
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each other. However, there needs to a mechanism to store those results and
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select peers from them. It is also important to note that remote peers can't
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be trusted to send valid peers nor attempt to provide you with only peers they
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control with malicious intent.
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With that in mind, this package provides a concurrency safe address manager for
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caching and selecting peers in a non-deterministic manner. The general idea is
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the caller adds addresses to the address manager and notifies it when addresses
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are connected, known good, and attempted. The caller also requests addresses as
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it needs them.
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The address manager internally segregates the addresses into groups and
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non-deterministically selects groups in a cryptographically random manner. This
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reduce the chances multiple addresses from the same nets are selected which
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generally helps provide greater peer diversity, and perhaps more importantly,
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drastically reduces the chances an attacker is able to coerce your peer into
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only connecting to nodes they control.
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The address manager also understands routability and Tor addresses and tries
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hard to only return routable addresses. In addition, it uses the information
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provided by the caller about connected, known good, and attempted addresses to
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periodically purge peers which no longer appear to be good peers as well as
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bias the selection toward known good peers. The general idea is to make a best
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effort at only providing usable addresses.
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*/
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package addrmgr
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