Function extractScriptHash

txscript/standard.go:195–207

extractScriptHash extracts the script hash from the passed script if it is a standard pay-to-script-hash script. It will return nil otherwise. NOTE: This function is only valid for version 0 opcodes. Since the function does not accept a script version, the results are undefined for other script v

(script []byte)

// does not accept a script version, the results are undefined for other script
// versions.
func extractScriptHash(script []byte) []byte {
	// A pay-to-script-hash script is of the form:
	//  OP_HASH160 OP_DATA_20 <20-byte scripthash> OP_EQUAL
	if len(script) == 23 &&
		script[0] == OP_HASH160 &&
		script[1] == OP_DATA_20 &&
		script[22] == OP_EQUAL {

		return script[2:22]
	}

	return nil
}

// isScriptHashScript returns whether or not the passed script is a standard
// pay-to-script-hash script.