4774fda89a
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 ------------------------------------------------------------------------------ BenchmarkExtractAtomicSwapDataPushes 1330 410 -69.17% BenchmarkExtractAtomicSwapDataPushesLarge 136819 69.3 -99.95% benchmark old allocs new allocs delta ------------------------------------------------------------------------------ BenchmarkExtractAtomicSwapDataPushes 2 1 -50.00% BenchmarkExtractAtomicSwapDataPushesLarge 1 0 -100.00% benchmark old bytes new bytes delta ------------------------------------------------------------------------------ BenchmarkExtractAtomicSwapDataPushes 3168 96 -96.97% BenchmarkExtractAtomicSwapDataPushesLarge 466944 0 -100.00% |
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| .. | ||
| data | ||
| bench_test.go | ||
| consensus_test.go | ||
| consensus.go | ||
| doc.go | ||
| engine_test.go | ||
| engine.go | ||
| error_test.go | ||
| error.go | ||
| example_test.go | ||
| go.mod | ||
| go.sum | ||
| log.go | ||
| opcode_test.go | ||
| opcode.go | ||
| README.md | ||
| reference_test.go | ||
| script_test.go | ||
| script.go | ||
| scriptbuilder_test.go | ||
| scriptbuilder.go | ||
| scriptnum_test.go | ||
| scriptnum.go | ||
| sigcache_test.go | ||
| sigcache.go | ||
| sighash_test.go | ||
| sighash.go | ||
| sign_test.go | ||
| sign.go | ||
| stack_test.go | ||
| stack.go | ||
| standard_test.go | ||
| standard.go | ||
| tokenizer_test.go | ||
| tokenizer.go | ||
txscript
Package txscript implements the Decred 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 Decred transaction scripts.
Decred Scripts
Decred provides a stack-based, FORTH-like language for the scripts in the Decred transactions. This language is not turing complete although it is still fairly powerful.
Installation and Updating
$ go get -u github.com/decred/dcrd/txscript
Examples
-
Standard Pay-to-pubkey-hash Script
Demonstrates creating a script which pays to a Decred 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.
License
Package txscript is licensed under the copyfree ISC License.