Method checkHashTypeEncoding

txscript/engine.go:1212–1223

checkHashTypeEncoding returns whether or not the passed hashtype adheres to the strict encoding requirements if enabled.

(hashType SigHashType)

// checkHashTypeEncoding returns whether or not the passed hashtype adheres to
// the strict encoding requirements if enabled.
func (vm *Engine) checkHashTypeEncoding(hashType SigHashType) error {
	if !vm.hasFlag(ScriptVerifyStrictEncoding) {
		return nil
	}

	sigHashType := hashType & ^SigHashAnyOneCanPay
	if sigHashType < SigHashAll || sigHashType > SigHashSingle {
		str := fmt.Sprintf("invalid hash type 0x%x", hashType)
		return scriptError(ErrInvalidSigHashType, str)
	}
	return nil
}

// isStrictPubKeyEncoding returns whether or not the passed public key adheres
// to the strict encoding requirements.