Gateio Watch Order Book

'use strict';
import ccxt from '../../js/ccxt.js';
console.log('CCXT Version:', ccxt.version); // eslint-disable-line import/no-named-as-default-member
const orderbooks = {};
async function watchAllSymbols(exchange, symbols) {
   while (true) { // eslint-disable-line no-constant-condition
       const keys = Object.keys(orderbooks);
       if (symbols.length === keys.length) {
           console.log('\n\n\n\n\n');
           console.log('----------------------------------------------------');
           console.log('All orderbooks received at least one update:');
           for (let i = 0; i < symbols.length; i++) {
               const symbol = symbols[i];
               const orderbook = orderbooks[symbol];
               console.log(exchange.iso8601(exchange.milliseconds()), orderbook['datetime'], orderbook['nonce'], symbol, orderbook['asks'][0], orderbook['bids'][0]);
           }
           console.log('----------------------------------------------------');
           console.log('\n\n\n\n\n');
           // process.exit () // stop here if you want
           break;
       }
       else {
           await exchange.sleep(1000);
       }
   }
}
async function watchOrderBook(exchange, symbol) {
   while (true) { // eslint-disable-line no-constant-condition
       try {
           const orderbook = await exchange.watchOrderBook(symbol);
           orderbooks[symbol] = orderbook;
           console.log(exchange.iso8601(exchange.milliseconds()), orderbook['datetime'], orderbook['nonce'], symbol, orderbook['asks'][0], orderbook['bids'][0]);
       }
       catch (e) {
           console.log(e);
       }
   }
}
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 = [
       // 'SOS/USDT:USDT',
       // 'JASMY/USDT:USDT',
       // 'SLP/USDT:USDT',
       'ACH/USDT:USDT',
       'MKISHU/USDT:USDT',
       // 'GMT/USDT:USDT',
       // 'ASTR/USDT:USDT',
       'RAMP/USDT:USDT',
       'RSR/USDT:USDT',
       // 'RACA/USDT:USDT',
       // 'ROOK/USDT:USDT',
       // 'ROSE/USDT:USDT',
   ];
   await Promise.all([
       watchAllSymbols(exchange, symbols),
       ...symbols.map((symbol) => watchOrderBook(exchange, symbol)),
   ]);
}
main();