public void RequestHeaders(int headerIndex, int headerRequestCount)
{
BlockHeaderRequest hReq = new BlockHeaderRequest {
Height = headerIndex - 1, Count = headerRequestCount
};
Message message = NetRequestFactory.CreateMessage(AElfProtocolMsgType.HeaderRequest, hReq.ToByteArray());
EnqueueOutgoing(message);
}
private void RequestBlockById(byte[] id, int height = 0)
{
// Create the request object
BlockRequest br = new BlockRequest {
Id = ByteString.CopyFrom(id), Height = height
};
Message message = NetRequestFactory.CreateMessage(AElfProtocolMsgType.RequestBlock, br.ToByteArray());
if (message.Payload == null)
{
_logger?.Warn($"[{this}] request for block with id {id.ToHex()} failed because payload is null.");
return;
}
SendTimedRequest(message, br);
}
private void RequestBlockByIndex(int index)
{
// Create the request object
BlockRequest br = new BlockRequest {
Height = index
};
Message message = NetRequestFactory.CreateMessage(AElfProtocolMsgType.RequestBlock, br.ToByteArray());
if (message.Payload == null)
{
_logger?.Warn($"[{this}] request for block at height {index} failed because payload is null.");
return;
}
SendTimedRequest(message, br);
}
private async Task HandleBlockRequestJob(PeerMessageReceivedArgs args)
{
try
{
var breq = BlockRequest.Parser.ParseFrom(args.Message.Payload);
Block b;
if (breq.Id != null && breq.Id.Length > 0)
{
b = await _nodeService.GetBlockFromHash(breq.Id.ToByteArray());
}
else
{
b = await _nodeService.GetBlockAtHeight(breq.Height);
}
if (b == null)
{
_logger?.Warn($"Block not found {breq.Id?.ToByteArray().ToHex()}");
return;
}
Message req = NetRequestFactory.CreateMessage(AElfProtocolMsgType.Block, b.ToByteArray());
if (args.Message.HasId)
{
req.Id = args.Message.Id;
}
// Send response
args.Peer.EnqueueOutgoing(req, (_) =>
{
_logger?.Debug($"Block sent {{ hash: {b.BlockHashToHex}, to: {args.Peer} }}");
});
}
catch (Exception e)
{
_logger?.Error(e, "Error while during HandleBlockRequest.");
}
}
/// <summary>
/// This message broadcasts data to all of its peers. This creates and
/// sends an object with the provided pay-load and message type.
/// </summary>
/// <param name="messageMsgType"></param>
/// <param name="payload"></param>
/// <returns></returns>
private void BroadcastMessage(AElfProtocolMsgType messageMsgType, byte[] payload)
{
if (_peers == null || !_peers.Any())
{
_logger?.Warn("Cannot broadcast - no peers.");
return;
}
try
{
Message message = NetRequestFactory.CreateMessage(messageMsgType, payload);
foreach (var peer in _peers)
{
peer.EnqueueOutgoing(message);
}
}
catch (Exception e)
{
_logger?.Error(e, "Error while sending a message to the peers.");
}
}