public async Task NewBlockDiscoveredAsync(NewBlockDiscoveredEvent e)
{
var blockHash = new uint256(e.BlockHash);
// If block is already present in DB, there is no need to parse it again
var blockInDb = await txRepository.GetBlockAsync(blockHash.ToBytes());
if (blockInDb != null)
{
return;
}
logger.LogInformation($"Block parser got a new block {e.BlockHash} inserting into database");
var blockHeader = await rpcMultiClient.GetBlockHeaderAsync(e.BlockHash);
var blockCount = (await rpcMultiClient.GetBestBlockchainInfoAsync()).Blocks;
// If received block that is too far from the best tip, we don't save the block anymore and
// stop verifying block chain
if (blockHeader.Height < blockCount - appSettings.MaxBlockChainLengthForFork)
{
PushBlocksToEventQueue();
return;
}
var dbBlock = new Block
{
BlockHash = blockHash.ToBytes(),
BlockHeight = blockHeader.Height,
BlockTime = HelperTools.GetEpochTime(blockHeader.Time),
OnActiveChain = true,
PrevBlockHash = blockHeader.Previousblockhash == null?uint256.Zero.ToBytes() : new uint256(blockHeader.Previousblockhash).ToBytes()
};
// Insert block in DB and add the event to block stack for later processing
var blockId = await txRepository.InsertBlockAsync(dbBlock);
if (blockId.HasValue)
{
dbBlock.BlockInternalId = blockId.Value;
}
else
{
return;
}
newBlockStack.Push(new NewBlockAvailableInDB()
{
CreationDate = clock.UtcNow(),
BlockHash = new uint256(dbBlock.BlockHash).ToString(),
BlockDBInternalId = dbBlock.BlockInternalId,
});
await VerifyBlockChain(blockHeader.Previousblockhash);
}
private Task NewBlockDiscoveredAsync(NewBlockDiscoveredEvent arg)
{
lock (objLock)
{
lastRefreshedAt = DateTime.MinValue;
// Note that RpcMultiClient.GetBlockchainInfoAsync will return the WORST block from all nodes
// so in the case of X nodes reporting the best block, we will do actually do X^2 GetBlockchainInfoAsync
// calls and only when the last node will catchup, GetBlockchainInfoAsync will report changes result.
// We could optimize this by tracking per-node state in this class. This would also require
// that we subscribe to Node integration events.
}
return(Task.CompletedTask);
}
