private (byte[] PublicKey, byte[] PrivateKey) GetKeyPairBytes(int index)
        {
            var privateKey = DerivePathByIndex(index);
            var publicKey  = Bip32.GetPublicKey(privateKey, false);

            return(publicKey, privateKey);
        }
        private byte[] TestGetPublicKey(byte[] privateKey)
        {
            BIP32 bip32 = new BIP32();

            var publicKey = bip32.GetPublicKey(privateKey);

            return(publicKey);
        }