protected async Task InvokeAuthWebSocket(WebSocketAuthenticationRequest req)
{
if (AuthSubscriptionResult.ClientWebSocket.State == WebSocketState.Open)
{
try
{
string strReq = JsonConvert.SerializeObject(req, Newtonsoft.Json.Formatting.None,
new JsonSerializerSettings
{
NullValueHandling = NullValueHandling.Ignore
});
byte[] msgArray = Encoding.ASCII.GetBytes(strReq);
ArraySegment <byte> bytesToSend = new ArraySegment <byte>(msgArray);
await AuthSubscriptionResult.ClientWebSocket.SendAsync(bytesToSend, WebSocketMessageType.Text, true,
CancellationToken.None);
}
catch (Exception)
{
throw;
}
}
else
{
throw new Exception(string.Format("Not connected to BitMex on subscription channel:{0}", AuthSubscriptionResult.ClientWebSocket.State.ToString()));
}
}
protected async Task <AuthenticationResult> DoAuthenticate()
{
if (AuthSubscriptionResult == null)
{
AuthSubscriptionResult = await ConnectSubscriptions();
}
lock (tSubscrLock)
{
if (!AuthSubscriptionResult.Authenticated)
{
//1- A UNIX timestamp after which the request is no longer valid. This is to prevent replay attacks.
//In the example, we create an authentication valid for 12 hours
Int32 expires = (Int32)(DateTime.UtcNow.AddHours(12).Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
//2-api-key: Your public API key. This the id param returned when you create an API Key via the AP
string api_key = UserCredentials.BitMexID;
string api_secret = UserCredentials.BitMexSecret;
//3-api-signature: A signature of the request you are making.
//It is calculated as hex(HMAC_SHA256(apiSecret, verb + path + expires + data)).
string hexSignature = SignHMACSHA256(api_secret, _VERB, _ENDPOINT, expires);
WebSocketAuthenticationRequest autRequest = new WebSocketAuthenticationRequest()
{
op = "authKeyExpires",
args = new object[] { api_key, expires, hexSignature }
};
InvokeAuthWebSocket(autRequest).Wait();
}
}
return(AuthSubscriptionResult);
}
public string Build(DateTime utcDateTime)
{
string strDateTime = utcDateTime.ToString("s");
var request = new GetRequest()
.AddParam(_aKKey, _aKValue)
.AddParam(_sMKey, _sMVaue)
.AddParam(_sVKey, _sVValue)
.AddParam(_tKey, strDateTime);
string signature = _signer.Sign("GET", _host, _path, request.BuildParams());
var auth = new WebSocketAuthenticationRequest
{
AccessKeyId = _aKValue,
Timestamp = strDateTime,
Signature = signature
};
return(auth.ToJson());
}
