public void AcceptExternalBlock(EncodedBlock encodedBlock)
{
_backgroundQueue.Enqueue(token => new Task(() =>
{
if (encodedBlock?.Base64Block != null &&
!_encodedBlocksStorage.EncodedBlocksIds.Contains(encodedBlock.Id))
{
_encodedBlocksStorage.EncodedBlocksIds.Add(encodedBlock.Id);
var blockchainJson = Encoding.UTF8.GetString(Convert.FromBase64String(encodedBlock.Base64Block));
var incomingBlock = BlockchainConverter.DeserializeBlock(blockchainJson);
var result = AcceptBlock(incomingBlock, encodedBlock.NodeSenderId);
if (result.IsSuccess)
{
DistributeBlock(encodedBlock);
}
}
}, token));
}
public BaseResponse <bool> SynchronizeWithOtherNodes()
{
var blocks = new ConcurrentDictionary <string, DAM.Block.BlockBase>();
ServerNodes.Values.ParallelForEach(node =>
{
var json = node.HubConnection.Invoke <string>(nameof(ConsensusHub.GetLastBlockJson));
if (json != null)
{
blocks.TryAdd(node.Id, BlockchainConverter.DeserializeBlock(json));
}
});
var currentLastBlock = _blockchainService.GetLastBlock();
if (blocks.IsEmpty && currentLastBlock == null)
{
return(new ErrorResponse <bool>(
"The current blockchain is empty and there is no block to synchronize", false));
}
if (blocks.IsEmpty)
{
return(new ErrorResponse <bool>("There is no blocks to synchronize with!", false));
}
var longestBlock = blocks.OrderBy(b => b.Value.Depth).ThenBy(b => b.Value.Header.TimeStamp).First();
if (currentLastBlock == null)
{
return(AcceptBlock(longestBlock.Value, longestBlock.Key));
}
return(currentLastBlock.Depth >= longestBlock.Value.Depth
? new SuccessResponse <bool>("There is no need for synchronization!", false)
: AcceptBlock(longestBlock.Value, longestBlock.Key));
}