Binance JavaScript SDK example: ws-demo-usdm.ts
Binance websocket demo usdm JavaScript example for the Siebly Binance SDK, covering exchange REST API and WebSocket integration, setup, and production SDK docs.
We use environment variables in our examples for API keys. It is your responsibility to manage and secure your keys appropriately.
examples/Binance/WebSockets/Demo/ws-demo-usdm.ts
What this example covers
- Binance WebSocket stream JavaScript example.
- Uses the Siebly Binance SDK package
binanceinstead of hand-written WebSocket plumbing. - Source path:
Binance/WebSockets/Demo/ws-demo-usdm.ts. - Imports SDK symbols including
WebsocketClient. - Calls SDK methods such as
on(),subscribeKlines(),subscribeUsdFuturesUserDataStream().
How to use this example
- Start here for the specific request or stream pattern, then check the matching SDK guide for install, credentials, and operational notes.
- For WebSocket examples, keep reconnect, resubscribe, heartbeat, and event-handler behavior explicit in your service.
- Open the repository source when you need the latest committed version: GitHub source file.
import { WebsocketClient } from 'binance'; const key = process.env.API_KEY_COM || 'APIKEY';const secret = process.env.API_SECRET_COM || 'APISECRET'; async function start() { const wsClient = new WebsocketClient({ api_key: key, api_secret: secret, beautify: true, /** * Demo trading uses real market data with simulated trading. * Perfect for testing strategies without risk. */ demoTrading: true, }); wsClient.on('formattedMessage', (data) => { console.log('Demo WS data: ', JSON.stringify(data, null, 2)); }); wsClient.on('open', (data) => { console.log('Demo WS connection opened:', data.wsKey); }); wsClient.on('response', (data) => { console.log('Demo WS response: ', JSON.stringify(data, null, 2)); }); wsClient.on('reconnected', (data) => { console.log('Demo WS reconnected ', data?.wsKey); }); wsClient.on('exception', (data) => { console.error('Demo WS error', data); }); // Subscribe to USDM futures market streams on demo trading wsClient.subscribeKlines('BTCUSDT', '1m', 'usdm'); wsClient.subscribeUsdFuturesUserDataStream();} start();