public BlockValidationResult TryAddBlock(MinedBlock minedBlock, out Block candidateBlock)
{
bool found = _miningJobs.TryGetValue(minedBlock.BlockDataHash, out candidateBlock);
if (!found)
{
return(BlockValidationResult.BlockNotFound);
}
string difficultyCheck = new string('0', _nodeSettings.CurrentDifficulty);
if (!minedBlock.BlockHash.StartsWith(difficultyCheck))
{
return(BlockValidationResult.BlockHashDifficultyMismatch);
}
string blockHashCheck = HashUtils.ComputeBlockSha256Hash(
minedBlock.BlockDataHash,
minedBlock.DateCreated,
minedBlock.Nonce);
if (blockHashCheck != minedBlock.BlockHash)
{
return(BlockValidationResult.InvalidBlockHash);
}
if (candidateBlock.Index != _chain.Count)
{
return(BlockValidationResult.BlockAlreadyMined);
}
// block found, will be added in chain
_chain.Add(candidateBlock);
_miningJobs.Clear();
UpdateCandidateBlockData(candidateBlock, minedBlock);
MoveBlockTransactionsToConfirmed(candidateBlock);
_peerSynchronizationService.BroadcastNewBlockNotification(
_chain.Count,
GetCumulativeDifficulty(),
_nodeSettings.NodeUrl);
return(BlockValidationResult.Ok);
}
private static async Task MainAsync(string[] args)
{
string nodeBaseUrl;
string minerAddress;
if (args.Length < 2)
{
nodeBaseUrl = "http://localhost:64149";
minerAddress = "9a9f082f37270ff54c5ca4204a0e4da6951fe917";
}
else
{
nodeBaseUrl = args[0];
minerAddress = args[1];
}
TimeSpan maxJobDuration = new TimeSpan(0, 0, 5);
INodeClient nodeClient = new NodeClient(nodeBaseUrl);
Stopwatch stopwatch = new Stopwatch();
do
{
stopwatch.Start();
MiningJob job = await GetMiningJob(nodeClient, minerAddress).ConfigureAwait(false);
string difficultyCheck = new string('0', job.Difficulty);
DateTime dateCreated = DateTime.UtcNow;
ulong nonce = 0;
while (nonce < ulong.MaxValue)
{
string guess = HashUtils.ComputeBlockSha256Hash(job.BlockDataHash, dateCreated, nonce);
if (guess.StartsWith(difficultyCheck))
{
// block found, send it to the node
bool submitted = await SubmitMinedBlock(
nodeClient,
minerAddress,
5,
job.BlockDataHash,
dateCreated,
nonce,
guess).ConfigureAwait(false);
Console.WriteLine($"Submitting mining result {(submitted ? "successful" : "failed")}.");
break;
}
if (maxJobDuration < stopwatch.Elapsed)
{
stopwatch.Reset();
break;
}
// get new timestamp on every 100,000 iterations
if (nonce % 100000 == 0)
{
dateCreated = DateTime.UtcNow;
}
nonce++;
}
} while (true);
}
