public Block GetBlock(string blockHash)
{
try
{
var block = _daemonClient.GetBlock(blockHash);
return(block);
}
catch (RpcException e)
{
_logger.Error("Queried block does not exist {0:l} - {1:l}", blockHash, e.Message);
return(null);
}
}
private Block GetBlockInfo(IPersistedBlock block)
{
try
{
return(_daemonClient.GetBlock(block.BlockHash)); // query the block.
}
catch (RpcTimeoutException e)
{
_logger.Error(e, "RpcTimeoutException while getting block from daemon");
// on rpc-timeout exception, let block stay in pending status so we can query it again later.
block.Status = BlockStatus.Pending;
return(null);
}
catch (RpcConnectionException e)
{
_logger.Error(e, "RpcConnectionException while getting block from daemon");
// on rpc-connection exception, let block stay in pending status so we can query it again later.
block.Status = BlockStatus.Pending;
return(null);
}
catch (RpcErrorException e)
{
_logger.Error(e, "RpcErrorException while getting block from daemon");
// block not found
if (e.Code == (int)RpcErrorCode.RPC_INVALID_ADDRESS_OR_KEY)
{
block.Status = BlockStatus.Orphaned; // orphan the block if block does not exist.
}
// if we got an error that we do not handle
else
{
block.Status = BlockStatus.Pending; // let the block in pending status so we can query it again later.
_logger.Error("Unhandled rpc-error: {0:l}", e.Message);
}
return(null);
}
catch (RpcException e)
{
block.Status = BlockStatus.Pending; // and let block stay in pending status so we can query it again later.
_logger.Error("Unhandled rpc-exception: {0:l}", e.Message);
return(null);
}
}
private void QueryBlockTest_WithInvalidBlockHash_ShouldBeOrphaned()
{
// test case: coin daemon reports block hash as invalid.
var block = new PersistedBlock(1, false, false, false, "INVALID_HASH", "TX_HASH", 0, 0, DateTime.Now);
_daemonClient.GetBlock("INVALID_HASH").Returns(x =>
{
throw new RpcErrorException(new RpcErrorResponse
{
Error = new RpcError
{
Code = -5 // 'block not found'.
}
});
});
// query the block.
var exposed = Exposed.From(new BlockProcessor(_poolConfig, _daemonClient, _storageLayer));
exposed.QueryBlock(block);
// block should be marked as orphaned.
block.Status.Should().Equal(BlockStatus.Orphaned);
}
private bool SubmitBlock(IShare share)
{
// TODO: we should try different submission techniques and probably more then once: https://github.com/ahmedbodi/stratum-mining/blob/master/lib/bitcoin_rpc.py#L65-123
try
{
if (_poolConfig.Coin.Options.SubmitBlockSupported) // see if submitblock() is available.
{
_daemonClient.SubmitBlock(share.BlockHex.ToHexString()); // submit the block.
}
else
{
_daemonClient.GetBlockTemplate(share.BlockHex.ToHexString(), _poolConfig.Wallet.Address); // use getblocktemplate() if submitblock() is not supported.
}
var block = _daemonClient.GetBlock(share.BlockHash.ToHexString()); // query the block.
if (block == null) // make sure the block exists
{
_logger.Debug("Submitted block [{0}] cannot be found with getblock; [{1}]", share.BlockHash.ToHexString(), block.Hash);
return(false);
}
if (block.Confirmations == -1) // make sure the block is accepted.
{
_logger.Debug("Submitted block [{0}] is orphaned; [{1:l}]", block.Height, block.Hash);
return(false);
}
var expectedTxHash = share.CoinbaseHash.Bytes.ReverseBuffer().ToHexString(); // calculate our expected generation transactions's hash
var genTxHash = block.Tx.First(); // read the hash of very first (generation transaction) of the block
if (expectedTxHash != genTxHash) // make sure our calculated generated transaction and one reported by coin daemon matches.
{
_logger.Debug("Submitted block [{0}] doesn't seem to belong us as reported generation transaction hash [{1:l}] doesn't match our expected one [{2:l}]", block.Height, genTxHash, expectedTxHash);
return(false);
}
var genTx = _daemonClient.GetTransaction(block.Tx.First()); // get the generation transaction.
// make sure we were able to read the generation transaction
if (genTx == null)
{
_logger.Debug("Submitted block [{0}] doesn't seem to belong us as we can't read the generation transaction on our records [{1:l}]", block.Height, block.Tx.First());
return(false);
}
var poolOutput = genTx.GetPoolOutput(_poolConfig.Wallet.Address, _poolAccount); // get the output that targets pool's central address.
// make sure the blocks generation transaction contains our central pool wallet address
if (poolOutput == null)
{
_logger.Debug("Submitted block [{0}] doesn't seem to belong us as generation transaction doesn't contain an output for pool's central wallet address: {0:}", block.Height, _poolConfig.Wallet.Address);
return(false);
}
// if the code flows here, then it means the block was succesfully submitted and belongs to us.
share.SetFoundBlock(block, genTx); // assign the block to share.
_logger.Information("Found block [{0}] with hash [{1:l}]", share.Height, share.BlockHash.ToHexString());
return(true);
}
catch (RpcException e)
{
// unlike BlockProcessor's detailed exception handling and decision making based on the error,
// here in share-manager we only one-shot submissions. If we get an error, basically we just don't care about the rest
// and flag the submission as failed.
_logger.Debug("We thought a block was found but it was rejected by the coin daemon; [{0:l}] - reason; {1:l}", share.BlockHash.ToHexString(), e.Message);
return(false);
}
catch (Exception e)
{
_logger.Debug("We thought a block was found but it was rejected by the coin daemon; [{0:l}] - reason; {1:l}", share.BlockHash.ToHexString(), e.Message);
return(false);
}
}