public async Task <database_response> SendRequestToSocket(byte[] req)
{
byte[] response = null;
bool failed = false;
Utils utils = new Utils();
using (var ws = new WebSocket(url))
{
ws.OnError += (sender, e) =>
{
failed = true;
};
ws.OnMessage += (sender, e) =>
{
response = e.RawData;
};
ws.OnClose += (sender, e) =>
{
};
ws.Connect();
try
{
ws.Send(req);
}
catch (Exception e)
{
Console.WriteLine(e);
return(null);
}
while (response == null)
{
await Task.Delay(100);
if (failed)
{
return(null);
}
}
bzn_envelope env = new bzn_envelope();
database_response dbresp = new database_response();
using (var stream = new MemoryStream(response))
{
env = bzn_envelope.Parser.ParseFrom(stream);
dbresp = database_response.Parser.ParseFrom(env.DatabaseResponse);
if (dbresp.Redirect != null)
{
this.url = $"ws://{dbresp.Redirect.LeaderHost}:{dbresp.Redirect.LeaderPort}";
return(await SendRequestToSocket(req));
}
return(dbresp);
}
}
}
public async Task <database_response> DoRequest(bzn_envelope req, string uuid)
{
// request_id++;
// var req = BuildRequest(msg, request_id, uuid);
var response = await SendRequestToSocket(req.ToByteArray());
return(response);
}
public bzn_envelope BuildRequest(bzn_msg msg, string uuid)
{
var env = new bzn_envelope()
{
DatabaseMsg = msg.Db.ToByteString(),
};
return(env);
}
public bzn_envelope SignEnvelope(bzn_envelope env)
{
DateTime upper = DateTime.UtcNow;
DateTime lower = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
ulong timestamp = (ulong)(upper - lower).TotalMilliseconds;
// determine public key from provided key
var sender = GetPublicKey(Convert.FromBase64String(this.private_pem));
var payloadCase = 0;
switch (env.PayloadCase.ToString())
{
case "DatabaseMsg":
{
payloadCase = 10;
break;
}
case "PbftInternalRequest":
{
payloadCase = 11;
break;
}
case "DatabaseResponse":
{
payloadCase = 12;
break;
}
case "Json":
{
payloadCase = 13;
break;
}
case "Audit":
{
payloadCase = 14;
break;
}
case "Pbft":
{
payloadCase = 15;
break;
}
case "PbftMembership":
{
payloadCase = 16;
break;
}
case "StatusRequest":
{
payloadCase = 17;
break;
}
case "StatusResponse":
{
payloadCase = 18;
break;
}
}
String[] binForTheWin = new String[]
{
sender,
payloadCase.ToString(),
env.DatabaseMsg.ToStringUtf8(),
timestamp.ToString()
};
// data for serializing
env.Sender = sender;
var signer = new Utils();
var hexHash = BitConverter.ToString(Encoding.ASCII.GetBytes(DeterministicSerialize(binForTheWin))).Replace("-", "");
env.Signature = ByteString.CopyFrom(signer.SignData(StringToByteArray(hexHash), this.privateKeyParameters));
env.Timestamp = (ulong)timestamp;
// Console.WriteLine(DeterministicSerialize(binForTheWin));
if (VerifySignature(this.pubKeyParameters,
env.Signature.ToByteArray(),
DeterministicSerialize(binForTheWin)))
{
// var sigHex = BitConverter.ToString(env.ToByteArray()).Replace("-","");
// Console.WriteLine(sigHex);
return(env);
}
else
{
Console.WriteLine("Error in signature.");
return(null);
}
}
