public static byte[] SerializeCoinbase(IJob job, UInt32 extraNonce1)
{
var extraNonce1Buffer = BitConverter.GetBytes(extraNonce1.BigEndian());
byte[] result;
using (var stream = new MemoryStream())
{
stream.WriteBytes(job.CoinbaseInitial.HexToByteArray());
stream.WriteBytes(extraNonce1Buffer);
stream.WriteBytes(job.CoinbaseFinal.HexToByteArray());
result = stream.ToArray();
}
return(result);
}
//Coinbase for txid hash. Should just be the coinbase with txin sig removed. There is also a bug in the
//client where the msg length is written twice so this also needs to be replicated.
public static byte[] SerializeCoinbaseForTxId(IJob job, UInt32 extraNonce1, UInt32 extraNonce2)
{
var extraNonce1Buffer = BitConverter.GetBytes(extraNonce1.BigEndian());
var extraNonce2Buffer = BitConverter.GetBytes(extraNonce2.BigEndian());
byte[] result;
const int scriptSigPos = 0
+ 4 // version
+ 1 // txin count - varint(1)
+ 20 // pubKey - uint160
+ 8; // amount - uint64
if (job.CoinbaseInitial == null || job.CoinbaseInitial.Length <= scriptSigPos * 2)
{
return(null);
}
var initial = job.CoinbaseInitial.HexToByteArray();
byte[] initialNoSig;
using (var stream = new MemoryStream())
{
//write the initial excluding sig portion (1 byte - varint(0)
stream.WriteBytes(initial.Take(scriptSigPos).ToArray());
stream.WriteBytes(initial.Slice(scriptSigPos + 1, initial.Length));
//replicate double msg length bug
stream.WriteBytes(initial.Slice(initial.Length - 1, initial.Length));
initialNoSig = stream.ToArray();
}
using (var stream = new MemoryStream())
{
stream.WriteBytes(initialNoSig);
stream.WriteBytes(extraNonce1Buffer);
stream.WriteBytes(extraNonce2Buffer);
stream.WriteBytes(job.CoinbaseFinal.HexToByteArray());
result = stream.ToArray();
}
return(result);
}
/// <summary>
/// Block headers are sent in a headers packet in response to a getheaders message.
/// </summary>
/// <remarks>
/// https://en.bitcoin.it/wiki/Protocol_specification#Block_Headers
/// </remarks>
/// <example>
/// nodejs: https://github.com/zone117x/node-stratum-pool/blob/master/lib/blockTemplate.js#L85
/// </example>
/// <param name="job"></param>
/// <param name="merkleRoot"></param>
/// <param name="nTime"></param>
/// <param name="nonce"></param>
/// <returns></returns>
public static byte[] SerializeHeader(IJob job, byte[] merkleRoot, UInt32 nTime, UInt32 nonce)
{
byte[] result;
using (var stream = new MemoryStream())
{
stream.WriteValueU32(nonce.BigEndian());
stream.WriteValueU32(Convert.ToUInt32(job.EncodedDifficulty, 16).BigEndian());
stream.WriteValueU32(nTime.BigEndian());
stream.WriteBytes(merkleRoot);
stream.WriteBytes(job.PreviousBlockHash.HexToByteArray());
stream.WriteValueU32(job.BlockTemplate.Version.BigEndian());
result = stream.ToArray();
result = result.ReverseBytes();
}
return(result);
}