ticker

{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "subscribe",
  "params": {
    "channel": "ticker",
    "symbol": "BTC-PERP" // support "all"
  }
}

{
  "jsonrpc": "2.0",
  "method": "event",
  "params": {
    "channel": "ticker:BTC-PERP",
    "data": {
      "instrument_name": "BTC-PERP",
      "instrument_id": 1,
      "symbol": "BTC-PERP",
      "mark_price": 68295,
      "mid_price": 120000,
      "index_price": 67631.049159,
      "best_bid_price": 119999,
      "best_ask_price": 120001,
      "best_bid_size": 0.001,
      "best_ask_size": 0.002,
      "funding_rate": 0.000012,
      "volume_24h": 6319.722,
      "change_24h": 341,
      "open_interest": 0.093,
      "max_trading_price": 70344.489513,
      "min_trading_price": 66246.75226,
      "premium": 0,
      "last_price": 119999
    }
  }
}

import websocket
import json

def on_message(ws, message):
    print(f"Received: {message}")

def on_open(ws):
    subscribe_msg = {
        "jsonrpc": "2.0",
        "id": "1",
        "method": "subscribe",
        "params": {
            "channel": "ticker",
            "symbol": "BTC-PERP"
        }
    }
    ws.send(json.dumps(subscribe_msg))

ws = websocket.WebSocketApp("wss://api.hotstuff.trade/ws",
                          on_message=on_message,
                          on_open=on_open)
ws.run_forever()

const ws = new WebSocket("wss://api.hotstuff.trade/ws");

ws.onopen = function () {
  const subscribeMsg = {
    jsonrpc: "2.0",
    id: "1",
    method: "subscribe",
    params: {
      channel: "ticker",
      symbol: "BTC-PERP",
    },
  };
  ws.send(JSON.stringify(subscribeMsg));
};

ws.onmessage = function (event) {
  console.log("Received:", event.data);
};