Binance JavaScript SDK example: ws-public-usdm-funding.ts
Binance websocket public usdm funding 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/Public/ws-public-usdm-funding.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/Public/ws-public-usdm-funding.ts. - Imports SDK symbols including
DefaultLogger,WebsocketClient. - Calls SDK methods such as
on(),subscribeAllMarketMarkPrice().
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 { DefaultLogger, isWsFormattedMarkPriceUpdateArray, WebsocketClient,} from 'binance'; (async () => { const logger = { ...DefaultLogger, // trace: () => {}, }; const wsClient = new WebsocketClient( { // api_key: key, // api_secret: secret, beautify: true, }, logger, ); wsClient.on('formattedMessage', (data) => { if (isWsFormattedMarkPriceUpdateArray(data)) { console.log('all mark price evt received '); const mapped = data .map((r) => { return { ...r, // value is in decimal, multiply by 100 to get percent value fundingRate: (Number(r.fundingRate) * 100).toFixed(2), }; }) .sort((a, b) => a.symbol.localeCompare(b.symbol)); // log table sorted alphabetically by symbol console.table(mapped); return; } console.log('log unhandled formatted msg: ', data); }); wsClient.on('open', (data) => { console.log('connection opened open:', data.wsKey, data.wsUrl); }); // response to command sent via WS stream (e.g LIST_SUBSCRIPTIONS) wsClient.on('response', (data) => { console.log('log response: ', JSON.stringify(data, null, 2)); }); wsClient.on('reconnecting', (data) => { console.log('ws automatically reconnecting.... ', data?.wsKey); }); wsClient.on('reconnected', (data) => { console.log('ws has reconnected ', data?.wsKey); }); wsClient.subscribeAllMarketMarkPrice('usdm', 1000);})();