public async Task GetNewBlockSyncRequests()
{
var blockNumber = await _blockService.GetBlockNumberFromNodeAsync();
Console.WriteLine($"Latest block number {blockNumber} found.");
using (var blockSyncRequestRepository = new MongoRepository <BlockSyncRequest>())
{
var orderByIndex = Builders <BlockSyncRequest> .Sort.Descending("block_number");
var latestBlockSync = await blockSyncRequestRepository.GetAsync(null, orderByIndex);
var newBlockSyncs = new List <BlockSyncRequest>();
for (var i = latestBlockSync?.BlockNumber + 1 ?? 0; i <= blockNumber; i++)
{
var blockSync = new BlockSyncRequest()
{
BlockNumber = i,
Processed = false
};
newBlockSyncs.Add(blockSync);
}
Console.WriteLine($"Saving {newBlockSyncs.Count} new block sync requests.");
if (newBlockSyncs.Count > 0)
{
var saveBlockSyncRequestsOperations = newBlockSyncs.Split(10000);
var blockSyncRequestSaveTasks = saveBlockSyncRequestsOperations.Select(SaveBlockSyncRequests).ToList();
await Task.WhenAll(blockSyncRequestSaveTasks);
}
}
}
private async Task SyncBlockAsync(BlockSyncRequest blockSyncRequest)
{
var blockBuilder = Builders <Block> .Filter;
var blockFilter = blockBuilder.Where(x => x.BlockNumber == blockSyncRequest.BlockNumber);
var excistingBlocks = await _blockRepository.FindAsync(blockFilter, null);
var blockExists = excistingBlocks.Count() > 0;
Web3.Models.DTOs.Block block;
try
{
block = await _blockService.GetBlockFromNodeAsync(blockSyncRequest.BlockNumber);
}
catch (Exception ex)
{
Console.WriteLine($"Error getting block {blockSyncRequest.BlockNumber} from the node.");
return;
}
if (block == null)
{
Console.WriteLine($"Block {blockSyncRequest.BlockNumber} could not be find in the node.");
return;
}
var dbBlock = await _blockService.ConvertToDbBlockAsync(block, _tokenRepository, _priceRepository, _currentPrice);
if (!blockExists)
{
await SaveBlock(dbBlock);
}
var transactions = new List <Transaction>();
foreach (var transaction in dbBlock.Transactions)
{
var builder = Builders <Transaction> .Filter;
var filter = builder.Where(x => x.TransactionHash == transaction.TransactionHash);
var dbTransactions = await _transactionRepository.FindAsync(filter, null);
var dbTransaction = dbTransactions.FirstOrDefault();
if (dbTransaction == null)
{
transactions.Add(transaction);
}
else
{
dbTransaction.BlockHash = dbBlock.Hash;
dbTransaction.BlockNumber = dbBlock.BlockNumber;
dbTransaction.Timestamp = dbBlock.Timestamp;
transactions.Add(dbTransaction);
}
}
await SaveTransactions(transactions);
blockSyncRequest.Processed = true;
await _blockSyncRequestRepository.SaveAsync(blockSyncRequest);
}