Limited depth

request

format: depth@{symbol},{levels}

levels: 5, 10, 20, 50

eg: depth@btc_usdt,20

rate: 1000ms

Response

{
  "topic": "depth", 
  "event": "depth@btc_usdt,20", 
  "data": {
    "s": "btc_usdt",        // symbol
    "i": 12345678,          // updateId
    "t": 1657699200000,     // time
    "a": [                  // asks(sell order)
      [                     //[0]price, [1]quantity
        "34000",            //price
        "1.2"               //quantity 
      ], 
      [
        "34001", 
        "2.3"
      ]
    ], 
    "b": [                   // bids(buy order)
      [
        "32000", 
        "0.2"
      ], 
      [
        "31000", 
        "0.5"
      ]
    ]
  }
}