sclass BitGet {

  S domain = "https://api.bitget.com";

  S webSocketURL = "wss://ws.bitget.com/spot/v1/stream";

  Timestamp serverTime() {

    ret new Timestamp(toLong(loadJSONMapPage(domain + "/api/spot/v1/public/time").get("data")));

  }

  // How much we are ahead or behind of the server's time

  // (Note: includes network lag)

  Duration serverTimeDifference() {

    var serverTime = serverTime();

    ret tsNow().minusAsDuration(serverTime);

  }

  WebSocketClient printingWebSocketClient() ctex {

    ret new PrintingWebSocketClient(new URI(webSocketURL));

  }

  S signMessage(S message, BitGetCredentials cred) {

    ret base64(hmacSHA256(message, hexToBytes(assertNempty(cred.secretKey()))));

  }

  Map loginRequest(BitGetCredentials cred) {

    S timestamp = str(serverTime().unixSeconds());

    S messageToSign = timestamp /* + "GET" + "/user/verify"*/;

    S sign = signMessage(messageToSign, cred);

    ret litorderedmap(

      op := "login",

      args := ll(litorderedmap(

        apiKey := assertNempty(cred.apiKey),

        passphrase := assertNempty(cred.passphrase),

        +timestamp,

        +sign

      )));

  }

}