96c8bc1e93
This converts the ExtractAtomicSwapDataPushes function to make use of the new tokenizer instead of the far less efficient parseScript thereby significantly optimizing the function. The new implementation is designed such that it should be fairly easy to move the function into the atomic swap tools where it more naturally belongs now that the tokenizer makes it possible to analyze scripts outside of the txscript module. Consequently, this also deprecates the function. The following is a before and after comparison of attempting to extract from both a typical atomic swap script and a very large non-atomic swap script: benchmark old ns/op new ns/op delta BenchmarkExtractAtomicSwapDataPushesLarge-8 61332 44.4 -99.93% BenchmarkExtractAtomicSwapDataPushes-8 990 260 -73.74% benchmark old allocs new allocs delta BenchmarkExtractAtomicSwapDataPushesLarge-8 1 0 -100.00% BenchmarkExtractAtomicSwapDataPushes-8 2 1 -50.00% benchmark old bytes new bytes delta BenchmarkExtractAtomicSwapDataPushesLarge-8 311299 0 -100.00% BenchmarkExtractAtomicSwapDataPushes-8 3168 96 -96.97% |
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|---|---|---|
| .. | ||
| data | ||
| bench_test.go | ||
| consensus.go | ||
| doc.go | ||
| engine.go | ||
| engine_test.go | ||
| error.go | ||
| error_test.go | ||
| example_test.go | ||
| hashcache.go | ||
| hashcache_test.go | ||
| log.go | ||
| opcode.go | ||
| opcode_test.go | ||
| pkscript.go | ||
| pkscript_test.go | ||
| README.md | ||
| reference_test.go | ||
| script.go | ||
| script_test.go | ||
| scriptbuilder.go | ||
| scriptbuilder_test.go | ||
| scriptnum.go | ||
| scriptnum_test.go | ||
| sigcache.go | ||
| sigcache_test.go | ||
| sign.go | ||
| sign_test.go | ||
| stack.go | ||
| stack_test.go | ||
| standard.go | ||
| standard_test.go | ||
| tokenizer.go | ||
| tokenizer_test.go | ||
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. -
Counting Opcodes in Scripts
Demonstrates creating a script tokenizer instance and using it to count the number of opcodes a script contains.
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_NAMEis a placeholder for the specific tag:git tag -v TAG_NAME
License
Package txscript is licensed under the copyfree ISC License.