market:futures:tickers

Once you're connected to this subscription: wss://ws.amberdata.com/futures, you must provide either the instrument or exchange - one needs to be specified, both cannot be empty.

Request

{
  "jsonrpc" : "2.0",
  "id"      : 1,
  "method"  : "subscribe",
  "params"  : [ "market:futures:tickers", { "instrument": "BTCUSDT", "exchange": "binance" } ]
}

Param	Type	Description
instrument	`string`	The asset instrument.
exchange	`string`	The exchange for which to retrieve asset instruments.

Response

{
    "jsonrpc": "2.0",
    "method": "subscription",
    "params": {
        "subscription": "d5475b6c-552a-4ab6-903a-ba054e468ab5",
        "result": {
            "exchange": "binance",
            "instrument": "BTCUSDT",
            "exchangeTimestamp": 1711571015981,
            "exchangeTimestampNanoseconds": 0,
            "timestamp": 1711571015981,
            "bid": 69135.9,
            "ask": 69136,
            "mid": 69135.95,
            "last": null,
            "sequence": 4292896044090,
            "markPrice": 69136.1,
            "lastVolume": null,
            "bidVolume": 9.517,
            "askVolume": 0.527
        }
    }
}

Field	Type	Description
exchange	`string`	The exchange name.
instrument	`string`	The instrument name.
exchangeTimestamp	`number`	The exchange provided timestamp.
exchangeTimestampNanoseconds	`number`	The exchange provided nanosecond part of the `exchangeTimestamp` (if available from the exchange).
timestamp	`number`	The timestamp at which the event took place.
bid	`number`	The bid of the instrument.
ask	`number`	The ask of the instrument.
mid	`number`	The mid of the instrument.
last	`number`	The last of the instrument.
sequence	`number`	The sequence number (equal to `null` if it is not provided by the exchange).
lastVolume	`number`	The last volume for the instrument.
bidVolume	`number`	The order size of the best bid.
askVolume	`number`	The order size of the best ask.

Example

const WebSocket = require('ws');
const ws = new WebSocket('wss://ws.amberdata.com/futures', {headers: {x-api-key:'<api_key>'}});

ws.on('open', () => {
  ws.send(JSON.stringify({
      jsonrpc: '2.0',
      method: 'subscribe',
      params: ['market:futures:tickers', {'instrument': 'BTCUSDT', 'exchange': 'binance'}],
      id: 1,
    }));
});

ws.on('message', data => {
  console.log(JSON.stringify(JSON.parse(data), null, 2));
});