public override IEnumerable <PendingSwap> Update() { lock (String.Intern("PendingSetCurrentHeight_" + "neo")) { var result = new List <PendingSwap>(); try { var _interopBlockHeight = BigInteger.Parse(OracleReader.GetCurrentHeight("neo", "neo")); // initial start, we have to verify all processed swaps if (initialStart) { Logger.Debug($"Read all neo blocks now."); // TODO check if quick sync nodes are configured, if so use quick sync // we need to find a better solution for that though var allInteropBlocks = OracleReader.ReadAllBlocks("neo", "neo"); Logger.Debug($"Found {allInteropBlocks.Count} blocks"); foreach (var block in allInteropBlocks) { try { ProcessBlock(block, result); } catch (Exception e) { Logger.Debug($"Block {block.Hash} was not processed correctly: " + e); } } initialStart = false; Logger.Debug($"QuickSync: " + quickSync); // quick sync is only done once after startup if (quickSync) { // if quick sync is active, we can use a specific plugin installed on the nodes (EventTracker) try { var blockIds = neoAPI.GetSwapBlocks("ed07cffad18f1308db51920d99a2af60ac66a7b3", LocalAddress, _interopBlockHeight.ToString()); Logger.Debug($"Found {blockIds.Count} blocks to process "); List <InteropBlock> blockList = new List <InteropBlock>(); foreach (var entry in blockIds) { //logger.Debug($"read block {entry.Value}"); var url = DomainExtensions.GetOracleBlockURL("neo", "neo", PBigInteger.Parse(entry.Value.ToString())); blockList.Add(OracleReader.Read <InteropBlock>(DateTime.Now, url)); } // get blocks and order them for processing var blocksToProcess = blockList.Where(x => blockIds.ContainsKey(x.Hash.ToString())) .Select(x => new { block = x, id = blockIds[x.Hash.ToString()] }) .OrderBy(x => x.id); Logger.Debug($"blocks to process: {blocksToProcess.Count()}"); foreach (var entry in blocksToProcess.OrderBy(x => x.id)) { Logger.Debug($"process block {entry.id}"); ProcessBlock(entry.block, result); OracleReader.SetCurrentHeight("neo", "neo", _interopBlockHeight.ToString()); _interopBlockHeight = BigInteger.Parse(entry.id.ToString()); } } catch (Exception e) { Logger.Error("Inital start failed: " + e.ToString()); } } // return after the initial start to be able to process all swaps that happend in the mean time. return(result); } var blockIterator = new BlockIterator(neoAPI); var blockDifference = blockIterator.currentBlock - _interopBlockHeight; var batchCount = (blockDifference > 8) ? 8 : blockDifference; //TODO make it a constant, should be no more than 8 while (blockIterator.currentBlock > _interopBlockHeight) { if (_resyncBlockIds.Any()) { for (var i = 0; i < _resyncBlockIds.Count; i++) { var blockId = _resyncBlockIds.ElementAt(i); if (blockId > _interopBlockHeight) { Logger.Debug($"NeoInterop: Update() resync block {blockId} higher than current interop height, can't resync."); _resyncBlockIds.RemoveAt(i); continue; } try { Logger.Debug($"NeoInterop: Update() resync block {blockId} now."); var interopBlock = GetInteropBlock(blockId); ProcessBlock(interopBlock, result); } catch (Exception e) { Logger.Error($"NeoInterop: Update() resync block {blockId} failed: " + e); } _resyncBlockIds.RemoveAt(i); } } Logger.Debug($"Swaps: Current Neo chain height: {blockIterator.currentBlock}, interop: {_interopBlockHeight}, delta: {blockIterator.currentBlock - _interopBlockHeight}"); blockDifference = blockIterator.currentBlock - _interopBlockHeight; batchCount = (blockDifference > 8) ? 8 : blockDifference; if (batchCount > 1) { List <Task <InteropBlock> > taskList = CreateTaskList(batchCount); foreach (var task in taskList) { task.Start(); } Task.WaitAll(taskList.ToArray()); foreach (var task in taskList) { var block = task.Result; ProcessBlock(block, result); } OracleReader.SetCurrentHeight("neo", "neo", _interopBlockHeight.ToString()); _interopBlockHeight += batchCount; } else { var interopBlock = GetInteropBlock(_interopBlockHeight); ProcessBlock(interopBlock, result); OracleReader.SetCurrentHeight("neo", "neo", _interopBlockHeight.ToString()); _interopBlockHeight++; } } } catch (Exception e) { Logger.Error("Neo block sync failed: " + e); } return(result); } }