Function parseScriptFlags

txscript/reference_test.go:208–259

parseScriptFlags parses the provided flags string from the format used in the reference tests into ScriptFlags suitable for use in the script engine.

(flagStr string)

// parseScriptFlags parses the provided flags string from the format used in the
// reference tests into ScriptFlags suitable for use in the script engine.
func parseScriptFlags(flagStr string) (ScriptFlags, error) {
	var flags ScriptFlags

	sFlags := strings.Split(flagStr, ",")
	for _, flag := range sFlags {
		switch flag {
		case "":
			// Nothing.
		case "CHECKLOCKTIMEVERIFY":
			flags |= ScriptVerifyCheckLockTimeVerify
		case "CHECKSEQUENCEVERIFY":
			flags |= ScriptVerifyCheckSequenceVerify
		case "CLEANSTACK":
			flags |= ScriptVerifyCleanStack
		case "DERSIG":
			flags |= ScriptVerifyDERSignatures
		case "DISCOURAGE_UPGRADABLE_NOPS":
			flags |= ScriptDiscourageUpgradableNops
		case "LOW_S":
			flags |= ScriptVerifyLowS
		case "MINIMALDATA":
			flags |= ScriptVerifyMinimalData
		case "NONE":
			// Nothing.
		case "NULLDUMMY":
			flags |= ScriptStrictMultiSig
		case "NULLFAIL":
			flags |= ScriptVerifyNullFail
		case "P2SH":
			flags |= ScriptBip16
		case "SIGPUSHONLY":
			flags |= ScriptVerifySigPushOnly
		case "STRICTENC":
			flags |= ScriptVerifyStrictEncoding
		case "WITNESS":
			flags |= ScriptVerifyWitness
		case "DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM":
			flags |= ScriptVerifyDiscourageUpgradeableWitnessProgram
		case "MINIMALIF":
			flags |= ScriptVerifyMinimalIf
		case "WITNESS_PUBKEYTYPE":
			flags |= ScriptVerifyWitnessPubKeyType
		case "TAPROOT":
			flags |= ScriptVerifyTaproot
		case "CONST_SCRIPTCODE":
			flags |= ScriptVerifyConstScriptCode
		default:
			return flags, fmt.Errorf("invalid flag: %s", flag)
		}
	}
	return flags, nil
}

// parseTxValidTestFlags parses the tx_valid flag field. Modern Bitcoin Core
// tx_valid vectors encode flags to exclude from the full set of script flags.