Quote from: ANV on May 30, 2021, 08:35:36 AM

Где ошибка подписи по WebSocket?

HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, new Uri("https://api.kucoin.com/api/v1/bullet-public"));
HttpResponseMessage response = await httpClient.SendAsync(request).ConfigureAwait(false);
string message = await response.Content.ReadAsStringAsync();
RootWebSocket rws = JsonConvert.DeserializeObject<RootWebSocket>(message);
var rwsdata = rws.data;
string token = rwsdata.token;
string urlWebSocket = rwsdata.instanceServers[0].endpoint;
using var ws = new ClientWebSocket();
await ws.ConnectAsync(new Uri(urlWebSocket), CancellationToken.None);
var id = DateTime.UtcNow.Ticks;
var str_send = JsonConvert.SerializeObject(new { id = id, type = "subscribe",token=token, topic = "/market/ticker:BTC-USDT,ETH-USDT", privateChannel = false, response = true });
var buffer_send = Encoding.UTF8.GetBytes(str_send);
await ws.SendAsync(new ArraySegment<byte>(buffer_send), WebSocketMessageType.Text, true, CancellationToken.None);
byte[] buffer = new byte[1024];
var result = await ws.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
string messages = Encoding.UTF8.GetString(buffer, 0, result.Count);// ERROR required token

Для начала нужно посмотреть пришел ли токен, проверьте строку
string token = rwsdata.token; // что тут будет получено
console.log('token: ' + token);