public async Task CheckIncomingTransactions()
{
var lastBlockId = await wallet.GetLastBlockId();
int lastBlockHeight = 0;
try
{
var block = await blockService.GetBlock(BlockLocator.ByBlockId(lastBlockId));
lastBlockHeight = block.Height;
Console.WriteLine($"Last known block id {lastBlockId} is on height {lastBlockHeight}");
}
catch (NxtException e)
{
if (e.Message == "Unknown block")
{
Console.WriteLine($"Fork detected, unable to find block with id: {lastBlockId}. Manual rollback is needed!");
Environment.Exit(-1);
}
else
{
throw;
}
}
var blockchainStatus = await serverInfoService.GetBlockchainStatus();
var currentBlockHeight = blockchainStatus.NumberOfBlocks - 1;
var blocksToProcess = Math.Max(0, currentBlockHeight - lastBlockHeight - confirmations);
Console.WriteLine($"Current block height is: {currentBlockHeight} ({blocksToProcess} block(s) to process)");
var depositAccounts = await wallet.GetAllDepositAccounts();
var depositAddresses = new HashSet <string>(depositAccounts.Select(a => a.Address));
while (currentBlockHeight > lastBlockHeight + confirmations)
{
lastBlockHeight++;
Console.WriteLine($"Processing block @ height {lastBlockHeight}");
var block = await blockService.GetBlockIncludeTransactions(BlockLocator.ByHeight(lastBlockHeight), true);
var nxtTransactions = block.Transactions.Where(t => depositAddresses.Contains(t.RecipientRs) && !t.Phased)
.Union(block.ExecutedPhasedTransactions.Where(t => depositAddresses.Contains(t.RecipientRs)))
.Where(t => t.Amount.Nqt > 0);
foreach (var transaction in nxtTransactions)
{
Console.WriteLine($"Incoming {transaction.Amount.Nxt} NXT to {transaction.RecipientRs}");
var account = depositAccounts.Single(d => d.Address == transaction.RecipientRs);
account.BalanceNqt += transaction.Amount.Nqt;
await wallet.UpdateAccountBalance(account.Id, account.BalanceNqt);
}
await wallet.UpdateLastBlockId(block.BlockId);
}
}
public async Task <Block <ulong> > GetBlockAsync(ulong blockId)
{
try
{
var blockService = _serviceFactory.CreateBlockService();
var blockReply = await blockService.GetBlock(BlockLocator.ByBlockId(blockId));
IsOnline = true;
return(blockReply);
}
catch (HttpRequestException)
{
IsOnline = false;
throw;
}
catch (JsonReaderException e)
{
IsOnline = false;
throw new Exception("Error when parsing response", e);
}
}
public async Task <BlockchainStatus> GetBlockchainStatus()
{
var status = new BlockchainStatus();
var blockchainStatusReply = await _serverInfoService.GetBlockchainStatus();
var lastBlock = await _blockService.GetBlock(BlockLocator.ByBlockId(blockchainStatusReply.LastBlockId));
var confirmedBlock = await _blockService.GetBlock(BlockLocator.ByHeight(blockchainStatusReply.NumberOfBlocks - 11));
var secureBlock = await _blockService.GetBlock(BlockLocator.ByHeight(blockchainStatusReply.NumberOfBlocks - 721));
status.LastKnownBlockId = blockchainStatusReply.LastBlockId.ToSigned();
status.LastKnownBlockTimestamp = lastBlock.Timestamp;
status.LastConfirmedBlockId = confirmedBlock.BlockId.ToSigned();
status.LastConfirmedBlockTimestamp = confirmedBlock.Timestamp;
status.LastSecureBlockId = secureBlock.BlockId.ToSigned();
status.LastSecureBlockTimestamp = secureBlock.Timestamp;
return(status);
}