func generateTxId(nonce, creator []byte) string {
	f := sha256.New()
	f.Write(append(nonce, creator...))
	return hex.EncodeToString(f.Sum(nil))
}
// generateTxId returns SHA-256 hash of nonce and creator concatenation
generateTxId returns SHA-256 hash of nonce and creator concatenation
// generateTxId returns SHA - 256 hash of nonce and creator concatenation
func generateTxId(nonce, creator []byte) string {
	f := sha256.New()
	f.Write(append(nonce, creator...))
	return hex.EncodeToString(f.Sum(nil))
}
func generateTxId ( nonce , creator [ ] byte ) string { f := sha256 . New ( ) f . Write ( append ( nonce , creator ... ) ) return hex . EncodeToString ( f . Sum ( nil ) ) }
generateTxId returns SHA-256 hash of nonce and creator concatenation
generateTxId returns SHA - 256 hash of nonce and creator concatenation