Watch Many Orderbooks

'use strict';

import ccxt from '../../js/ccxt.js';

console.log ('CCXT Version:', ccxt.version); // eslint-disable-line import/no-named-as-default-member

async function watchOrderBook (exchangeId, symbol) {
   const exchange = new ccxt.pro[exchangeId] (); // eslint-disable-line import/no-named-as-default-member
   while (true) { // eslint-disable-line no-constant-condition
       try {
           const orderbook = await exchange.watchOrderBook (symbol);
           console.log (new Date (), exchange.id, symbol, orderbook['asks'][0], orderbook['bids'][0]);
       } catch (e) {
           console.log (symbol, e);
       }
   }
}

async function main () {
   const streams = {
       'binance': 'BTC/USDT',
       'ftx': 'BTC/USDT',
   };

   await Promise.all (Object.entries (streams).map (([ exchangeId, symbol ]) => watchOrderBook (exchangeId, symbol)));
}

main ();