订单成交

param

语法: trade

示例: trade

push

{
  "topic": "trade", 
  "event": "trade", 
  "data": {
    "s": "btc_usdt",           //symbol
    "i": 6316559590087222000,  //成交id
    "t": 1655992403617,        //时间
    "oi": 6616559590087222666, //订单id
    "p": "43000",              //价格
    "q": "0.21",               //数量
    "v": "9030",               //金额
    "b": true                  //是否是buyerMaker
  }
}