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
            }
        }
    })()));
})();