public static Task <SecretKey> NewRandomSecretKey(int chainId)
 {
     return(SecretKey.NewSecretKey(new RandomSecretKeyInfo(chainId), Rand.NextSeed(64)));
 }
 public static Task <SecretKey> NewPassphraseSecretKey(int chainId, string passphrase)
 {
     return(SecretKey.NewSecretKey(new PassphraseSecretKeyInfo(chainId), $"{"Passphrase"}.{passphrase}.{chainId.ToString("X8")}"));
 }