public BlockHeader MineBlockHeader(BlockHeader blockHeader, UInt256 hashTarget)
{
var blockHeaderBytes = DataEncoder.EncodeBlockHeader(blockHeader);
var hashTargetBytes = hashTarget.ToByteArray();
var start = 0;
var finish = UInt32.MaxValue;
var total = 0L;
var nonceIndex = 76;
var minedNonce = (UInt32?)null;
this.logger.Debug("Starting mining: {0}".Format2(DateTime.Now.ToString("hh:mm:ss")));
var stopwatch = Stopwatch.StartNew();
Parallel.For(
start, finish,
new ParallelOptions {
MaxDegreeOfParallelism = Environment.ProcessorCount * 2
},
() => new LocalMinerState(blockHeaderBytes),
(nonceLong, loopState, localState) =>
{
localState.total++;
var nonce = (UInt32)nonceLong;
var nonceBytes = Bits.GetBytes(nonce);
Buffer.BlockCopy(nonceBytes, 0, localState.headerBytes, nonceIndex, 4);
var headerBytes = localState.headerBytes;
var sha256 = localState.sha256;
var hashBytes = sha256.ComputeDoubleHash(headerBytes);
if (BytesCompareLE(hashBytes, hashTargetBytes) < 0)
{
minedNonce = nonce;
loopState.Stop();
}
return(localState);
},
localState => { Interlocked.Add(ref total, localState.total); });
stopwatch.Stop();
var hashRate = ((float)total / 1000 / 1000) / ((float)stopwatch.ElapsedMilliseconds / 1000);
if (minedNonce != null)
{
this.logger.Debug("Found block in {0} hh:mm:ss at Nonce {1}, Hash Rate: {2} mHash/s, Total Hash Attempts: {3}, Found Hash: {4}".Format2(stopwatch.Elapsed.ToString(@"hh\:mm\:ss"), minedNonce, hashRate, total.ToString("#,##0"), blockHeader.With(Nonce: minedNonce).Hash));
return(blockHeader.With(Nonce: minedNonce));
}
else
{
this.logger.Debug("No block found in {0} hh:mm:ss, Hash Rate: {1} mHash/s, Total Hash Attempts: {2}, Found Hash: {3}".Format2(stopwatch.Elapsed.ToString(@"hh\:mm\:ss"), hashRate, total.ToString("#,##0"), blockHeader.With(Nonce: minedNonce).Hash));
return(null);
}
}
public BlockHeader MineBlockHeader(BlockHeader blockHeader, UInt256 hashTarget)
{
var blockHeaderBytes = DataEncoder.EncodeBlockHeader(blockHeader);
var hashTargetBytes = hashTarget.ToByteArray();
var start = 0;
var finish = UInt32.MaxValue;
var total = 0L;
var nonceIndex = 76;
var minedNonce = (UInt32?)null;
var stopwatch = Stopwatch.StartNew();
Parallel.For(
start, finish,
() => new LocalMinerState(blockHeaderBytes),
(nonceLong, loopState, localState) =>
{
localState.total++;
var nonce = (UInt32)nonceLong;
var nonceBytes = Bits.GetBytes(nonce);
Buffer.BlockCopy(nonceBytes, 0, localState.headerBytes, nonceIndex, 4);
var headerBytes = localState.headerBytes;
var hashBytes = SHA256Static.ComputeDoubleHash(headerBytes);
if (BytesCompareLE(hashBytes, hashTargetBytes) < 0)
{
minedNonce = nonce;
loopState.Stop();
}
return(localState);
},
localState => { Interlocked.Add(ref total, localState.total); });
stopwatch.Stop();
var hashRate = total / stopwatch.Elapsed.TotalSeconds;
if (minedNonce == null)
{
throw new InvalidOperationException();
}
var minedHeader = blockHeader.With(Nonce: minedNonce);
logger.Debug($"Found block in {stopwatch.Elapsed.TotalMilliseconds:N3}ms at Nonce {minedNonce}, Hash Rate: {hashRate / 1.MILLION()} mHash/s, Total Hash Attempts: {total:N0}, Found Hash: {minedHeader.Hash}");
return(minedHeader);
}
public async Task SendHeaders(ImmutableArray <BlockHeader> blockHeaders)
{
await Task.Yield();
using (var payloadStream = new MemoryStream())
using (var payloadWriter = new BinaryWriter(payloadStream))
{
payloadWriter.WriteVarInt((UInt64)blockHeaders.Length);
foreach (var blockHeader in blockHeaders)
{
DataEncoder.EncodeBlockHeader(payloadWriter, blockHeader);
payloadWriter.WriteVarInt(0);
}
await SendMessageAsync(Messaging.ConstructMessage("headers", payloadStream.ToArray()));
}
}
public BlockHeaderStorage(string baseDirectory)
: base(baseDirectory, "BlockHeaders",
blockHeader => DataEncoder.EncodeBlockHeader(blockHeader),
(blockHash, bytes) => DataEncoder.DecodeBlockHeader(bytes, blockHash))
{
}
public void TestWireDecodeBlockHeader()
{
var actual = DataEncoder.EncodeBlockHeader(DataEncoder.DecodeBlockHeader(BLOCK_HEADER_1_BYTES.ToArray()));
CollectionAssert.AreEqual(BLOCK_HEADER_1_BYTES.ToList(), actual.ToList());
}
