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Olaoluwa Osuntokun aaf187427e BIP0141+txscript: implement witness program validation

This commit implements full witness program validation for the
currently defined version 0 witness programs. This includes validation
logic for nested p2sh, p2wsh, and p2wkh. Additionally, when in witness
validation mode, an additional set of constrains are enforced such as
using the new sighash digest algorithm and enforcing clean stack
behavior within witness programs.

2017-08-13 23:17:40 -05:00

data

txscript: Implement ScriptVerifyNullFail

2017-01-13 14:19:11 -05:00

consensus.go

txscript: Implement CheckSequenceVerify (BIP0112)

2016-10-19 12:06:44 -04:00

doc.go

txscript: Significantly improve errors.

2017-01-12 13:12:39 -06:00

engine_test.go

BIP0141+txscript: implement witness program validation

2017-08-13 23:17:40 -05:00

engine.go

BIP0141+txscript: implement witness program validation

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error_test.go

txscript: Implement ScriptVerifyNullFail

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error.go

BIP0141+txscript: implement witness program validation

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example_test.go

BIP0143+txscript: add segwit sighash, signing, and HashCache integration

2017-08-13 23:17:40 -05:00

hashcache_test.go

BIP0143+txscript: add segwit sighash, signing, and HashCache integration

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hashcache.go

BIP0143+txscript: add segwit sighash, signing, and HashCache integration

2017-08-13 23:17:40 -05:00

log.go

all: Remove seelog logger.

2017-06-19 16:46:50 -04:00

opcode_test.go

txscript: Significantly improve errors.

2017-01-12 13:12:39 -06:00

opcode.go

BIP0141+txscript: implement witness program validation

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README.md

multi: Update markdown files for GFM changes.

2017-05-25 12:06:16 -05:00

reference_test.go

txscript: Implement ScriptVerifyNullFail

2017-01-13 14:19:11 -05:00

script_test.go

BIP0141+txscript: implement signature operation cost calculations

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script.go

BIP0141+txscript: implement signature operation cost calculations

2017-08-13 23:17:40 -05:00

scriptbuilder_test.go

txscript: Significantly improve errors.

2017-01-12 13:12:39 -06:00

scriptbuilder.go

txscript: Significantly improve errors.

2017-01-12 13:12:39 -06:00

scriptnum_test.go

txscript: Significantly improve errors.

2017-01-12 13:12:39 -06:00

scriptnum.go

txscript: Significantly improve errors.

2017-01-12 13:12:39 -06:00

sigcache_test.go

chainhash: Abstract hash logic to new package. (#729 )

2016-08-08 14:04:33 -05:00

sigcache.go

txscript: Drop the mutex before doing crypto

2017-01-31 13:47:41 -05:00

sign_test.go

BIP0141+txscript: implement witness program validation

2017-08-13 23:17:40 -05:00

sign.go

BIP0143+txscript: add segwit sighash, signing, and HashCache integration

2017-08-13 23:17:40 -05:00

stack_test.go

txscript: Significantly improve errors.

2017-01-12 13:12:39 -06:00

stack.go

multi: Simplify code per gosimple linter.

2017-03-22 15:34:13 -05:00

standard_test.go

BIP0141+txscript: awareness of new standard script templates, add helper funcs

2017-08-13 23:17:40 -05:00

standard.go

BIP0141+txscript: implement witness program validation

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README.md

txscript

Package txscript implements the bitcoin transaction script language. There is a comprehensive test suite.

This package has intentionally been designed so it can be used as a standalone package for any projects needing to use or validate bitcoin transaction scripts.

Bitcoin Scripts

Bitcoin provides a stack-based, FORTH-like language for the scripts in the bitcoin transactions. This language is not turing complete although it is still fairly powerful. A description of the language can be found at https://en.bitcoin.it/wiki/Script

Installation and Updating

$ go get -u github.com/btcsuite/btcd/txscript

Examples

Standard Pay-to-pubkey-hash Script
Demonstrates creating a script which pays to a bitcoin address. It also prints the created script hex and uses the DisasmString function to display the disassembled script.
Extracting Details from Standard Scripts
Demonstrates extracting information from a standard public key script.
Manually Signing a Transaction Output
Demonstrates manually creating and signing a redeem transaction.

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:
```
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:
```
git tag -v TAG_NAME
```

License

Package txscript is licensed under the copyfree ISC License.