资金费率

请求

语法: fund_rate@{symbol}

示例: fund_rate@btc_usdt

速率: 60s

Response

{
    "topic": "fund_rate", 
    "event": "fund_rate@btc_usdt", 
    "data": {
        "s":"btc_usdt", //交易对
        "r":"0.01",    // 资金费率
        "t":123124124   //时间戳
    }
}