public MinedBlockInfoResponse GetBlock(string blockHash)
{
MinedBlockInfo block = dbService.GetAllBlocks().Where(b => b.BlockHash.Equals(blockHash) ||
b.BlockDataHash.Equals(blockHash)).FirstOrDefault();
if (block != null)
{
return(MinedBlockInfoResponse.FromMinedBlockInfo(block));
}
return(null);
}
private bool IsPeersBlockValid(MinedBlockInfo block)
{
var mbi = new MinedBlockInfo(MiningBlockInfo.FromMinedBlockInfo(block))
{
Nonce = block.Nonce,
DateCreated = block.DateCreated,
};
var isGenesisBlock = block.Index == 0;
var hashCoversDifficulty = mbi.BlockHash.StartsWith("".PadLeft(appSettings.Difficulty, '0'));
var hashesMatch = mbi.BlockHash == block.BlockHash;
return(hashesMatch && (hashCoversDifficulty || isGenesisBlock));
}
private void AddToCurrentChain(MinedBlockInfo block)
{
lock (dbService.GetBlocksLockObject())
{
lock (dbService.GetTransactionsLockObject())
{
if (dbService.TryAddBlock(block))
{
//remove pending transactions that are already verified in the other chain
block.Transactions.ForEach(t => dbService.RemoveTransaction(t));
}
}
}
}
private void PropagateBlockToPeers(MinedBlockInfo block)
{
var tasks = new List <Task>();
var body = new NewBlockNotification
{
LastBlock = MinedBlockInfoResponse.FromMinedBlockInfo(block),
Sender = thisPeer
};
dbService.GetPeers().ForEach(p =>
{
tasks.Add(Task.Run(() =>
HttpUtils.DoApiPost <NewBlockNotification, object>(p.Url, NOTIFY_API_PATH, body)));
});
Task.WaitAll(tasks.ToArray());
}
public SubmitBlockResponse SubmitBlockInfo(MinedBlockInfoRequest data)
{
lock (dbService.GetBlocksLockObject())
{
lock (dbService.GetTransactionsLockObject())
{
var info = dbService.GetMiningInfo(data.BlockDataHash);
if (null == info)
{
return(new SubmitBlockResponse
{
Status = BlockResponseStatus.Error,
Message = "Wrong block hash!"
});
}
var mbi = new MinedBlockInfo(info)
{
Nonce = data.Nonce,
DateCreated = data.DateCreated,
};
if (mbi.BlockHash.StartsWith("".PadLeft(appSettings.Difficulty, '0')))
{
var success = dbService.TryAddBlock(mbi);
if (!success)
{
return(new SubmitBlockResponse
{
Status = BlockResponseStatus.Error,
Message = "Old block! Someone mined it already"
});
}
//UPDATE transactions in the block.
mbi.Transactions.ForEach(t =>
{
t.MinedInBlockIndex = info.Index;
t.TransferSuccessful = true;
dbService.RemoveTransaction(t);
});
PropagateBlockToPeers(mbi);
return(new SubmitBlockResponse
{
Status = BlockResponseStatus.Success,
Message = $"Block is valid"
});
}
else
{
return(new SubmitBlockResponse
{
Status = BlockResponseStatus.Error,
Message = $"Hash must start with {appSettings.Difficulty} zeroes"
});
}
}
}
}
public bool TryAddBlock(MinedBlockInfo block)
{
return(allBlocks.TryAdd(block.Index, block));
}
