Binance TypeScript SDK example: ws-public-usdm-funding.ts

Binance WebSocket Public websocket public usdm funding example for the Siebly Binance SDK, with TypeScript source for exchange REST API and WebSocket integration, setup, and production SDK docs.

What This Example Covers

Binance WebSocket stream example in TypeScript.
Uses the Siebly Binance SDK package binance instead of hand-written WebSocket plumbing.
Source path: Binance/WebSockets/Public/ws-public-usdm-funding.ts.
Example category: WebSocket Public.
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.

Example Path

Binance/WebSockets/Public/ws-public-usdm-funding.ts

Source Link

Repository source: https://github.com/sieblyio/crypto-api-examples/blob/master/examples/Binance/WebSockets/Public/ws-public-usdm-funding.ts

Related SDK Docs

Example Source

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);
})();