我正在尝试使用ByBit衍生产品v3 API从WebSocket订阅公开市场数据。
我先通过/derivatives/v3/public/instruments-info查询反向合约BTCUSD的工具，得到如下：

{
  "symbol": "BTCUSD",
  "contractType": "InversePerpetual",
  "status": "Trading",
  "baseCoin": "BTC",
  "quoteCoin": "USD",
  "launchTime": "0",
  "deliveryTime": "0",
  "deliveryFeeRate": "",
  "priceScale": "2",
  "leverageFilter": {
    "minLeverage": "1",
    "maxLeverage": "100",
    "leverageStep": "0.01"
  },
  "priceFilter": {
    "minPrice": "0.50",
    "maxPrice": "999999.00",
    "tickSize": "0.50"
  },
  "lotSizeFilter": {
    "maxTradingQty": "1000000",
    "minTradingQty": "1",
    "qtyStep": "1"
  }
}

然后我按照WebSocket数据文档，使用端点wss://stream.bybit.com/contract/usdt/public/v3订阅主题orderbook.25.BTCUSD，我得到：

{"success":false,"ret_msg":"error:handler not found,topic:orderbook.25.BTCUSD","conn_id":"027f109e-a7fb-4af0-8b69-78bbb293e34b","req_id":"","op":"subscribe"}

主题orderbook.25.BTCUSDT工作，我知道有usdt在WebSocket端点，但在文档中没有其他选择，我尝试了usd/public/v3unified/public/v3，没有一个工作。