private static byte[] GeneratePrivateKey(byte[] seed, int nonce)
{
var stream = new MemoryStream(seed.Length + 4);
var writer = new BinaryWriter(stream);
writer.Write(nonce);
writer.Write(seed);
var accountSeed = AddressEncoding.SecureHash(stream.ToArray(), 0, stream.ToArray().Length);
var hashedSeed = SHA256.ComputeHash(accountSeed, 0, accountSeed.Length);
var privateKey = hashedSeed.ToArray();
privateKey[0] &= 248;
privateKey[31] &= 127;
privateKey[31] |= 64;
return(privateKey);
}
