protected override IWebSocket OnGetTickersWebSocket(Action<IReadOnlyCollection<KeyValuePair<string, ExchangeTicker>>> callback, params string[] marketSymbols)
{
Dictionary<int, string> channelIdToSymbol = new Dictionary<int, string>();
return ConnectWebSocket(string.Empty, (_socket, msg) =>
{
JToken token = JToken.Parse(msg.ToStringFromUTF8());
if (token is JArray array)
{
if (array.Count > 10)
{
List<KeyValuePair<string, ExchangeTicker>> tickerList = new List<KeyValuePair<string, ExchangeTicker>>();
if (channelIdToSymbol.TryGetValue(array[0].ConvertInvariant<int>(), out string symbol))
{
ExchangeTicker ticker = ParseTickerWebSocket(symbol, array);
if (ticker != null)
{
callback(new KeyValuePair<string, ExchangeTicker>[] { new KeyValuePair<string, ExchangeTicker>(symbol, ticker) });
}
}
}
}
else if (token["event"].ToStringInvariant() == "subscribed" && token["channel"].ToStringInvariant() == "ticker")
{
// {"event":"subscribed","channel":"ticker","chanId":1,"pair":"BTCUSD"}
int channelId = token["chanId"].ConvertInvariant<int>();
channelIdToSymbol[channelId] = token["pair"].ToStringInvariant();
}
return Task.CompletedTask;
}, async (_socket) =>
{
marketSymbols = marketSymbols == null || marketSymbols.Length == 0 ? (await GetMarketSymbolsAsync()).ToArray() : marketSymbols;
foreach (var marketSymbol in marketSymbols)
{
await _socket.SendMessageAsync(new { @event = "subscribe", channel = "ticker", pair = marketSymbol });
}
});
}
