Gateio Swap 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 loop(exchange, method, symbol) {
   while (true) {
       try {
           const orderbook = await exchange[method](symbol);
           console.log(exchange.iso8601(exchange.milliseconds()), orderbook['datetime'], orderbook['nonce'], symbol, orderbook['asks'][0], orderbook['bids'][0]);
       }
       catch (e) {
           console.log(e.constructor.name, e.message);
       }
   }
}
async function main() {
   const exchange = new ccxt.pro.gateio({
       'options': { 'defaultType': 'swap' },
   });
   await exchange.loadMarkets();
   // exchange.verbose = true // uncomment for debugging purposes if necessary
   const symbols = [
       'ANC/USDT:USDT',
   ];
   await Promise.all(symbols.map((symbol) => loop(exchange, 'fetchOrderBook', symbol)));
}
main();