7d97fd5ff8
This moves the new stdscript package from the internal staging area to the txscript module and updates the relevant paths and package README.md accordingly.
74 lines
2.6 KiB
Go
74 lines
2.6 KiB
Go
// Copyright (c) 2021 The Decred developers
|
|
// Use of this source code is governed by an ISC
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package stdscript_test
|
|
|
|
import (
|
|
"encoding/hex"
|
|
"fmt"
|
|
|
|
"github.com/decred/dcrd/txscript/v4/stdscript"
|
|
)
|
|
|
|
// 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
|
|
}
|
|
|
|
// This example demonstrates determining the type of a script for a given
|
|
// scripting language version.
|
|
func ExampleDetermineScriptType() {
|
|
// Ordinarily the script version and script would be obtained from the
|
|
// output of a transaction, but they are hard coded here for the purposes of
|
|
// this example.
|
|
const scriptVersion = 0
|
|
script := hexToBytes("76a914e280cb6e66b96679aec288b1fbdbd4db08077a1b88ac")
|
|
scriptType := stdscript.DetermineScriptType(scriptVersion, script)
|
|
switch scriptType {
|
|
case stdscript.STPubKeyHashEcdsaSecp256k1:
|
|
fmt.Printf("standard version %d %v script\n", scriptVersion, scriptType)
|
|
|
|
default:
|
|
fmt.Printf("other script type: %v\n", scriptType)
|
|
}
|
|
|
|
// Output:
|
|
// standard version 0 pubkeyhash script
|
|
}
|
|
|
|
// This example demonstrates extracting a public key hash from a standard
|
|
// pay-to-pubkey-hash script for scripting language version 0.
|
|
func ExampleExtractPubKeyHashV0() {
|
|
// Ordinarily the script version and script would be obtained from the
|
|
// output of a transaction, but the version is assumed to be zero and the
|
|
// script is hard coded here for the purposes of this example.
|
|
script := hexToBytes("76a914e280cb6e66b96679aec288b1fbdbd4db08077a1b88ac")
|
|
pkHash := stdscript.ExtractPubKeyHashV0(script)
|
|
fmt.Printf("public key hash: %x\n", pkHash)
|
|
|
|
// Output:
|
|
// public key hash: e280cb6e66b96679aec288b1fbdbd4db08077a1b
|
|
}
|
|
|
|
// This example demonstrates extracting a script hash from a standard
|
|
// pay-to-script-hash script for script language version 0.
|
|
func ExampleExtractScriptHashV0() {
|
|
// Ordinarily the script version and script would be obtained from the
|
|
// output of a transaction, but the version is assumed to be zero and the
|
|
// script is hard coded here for the purposes of this example.
|
|
script := hexToBytes("a914433ec2ac1ffa1b7b7d027f564529c57197f9ae8887")
|
|
scriptHash := stdscript.ExtractScriptHashV0(script)
|
|
fmt.Printf("script hash: %x\n", scriptHash)
|
|
|
|
// Output:
|
|
// script hash: 433ec2ac1ffa1b7b7d027f564529c57197f9ae88
|
|
}
|