One Exchange Many Streams

'use strict';
import ccxt from '../../js/ccxt.js';
console.log('CCXT Version:', ccxt.version); // eslint-disable-line import/no-named-as-default-member
(async () => {
   const exchange = new ccxt.pro.binance({}); // eslint-disable-line import/no-named-as-default-member
   const symbols = ['BTC/USDT', 'ETH/BTC', 'ETH/USDT'];
   await exchange.loadMarkets();
   await Promise.all(symbols.map((symbol) => (async () => {
       while (true) { // eslint-disable-line no-constant-condition
           try {
               const orderbook = await exchange.watchOrderBook(symbol);
               console.log(new Date(), symbol, orderbook['asks'][0], orderbook['bids'][0]);
           }
           catch (e) {
               console.log(symbol, e);
               // do nothing and retry on next loop iteration
               // throw e // uncomment to break all loops in case of an error in any one of them
               // break // you can also break just this one loop if it fails
           }
       }
   })()));
})();