Binance Fetch Ohlcv Many Symbols Async Await

// @NO_AUTO_TRANSPILE
'use strict';
import ccxt from '../../js/ccxt.js';
console.log('CCXT Version:', ccxt.version);
async function symbolLoop(exchange, symbol, timeframe) {
    while (true) {
        try {
            const ohlcvs = await exchange.fetchOHLCV(symbol, timeframe);
            console.log(exchange.iso8601(exchange.milliseconds()), exchange.id, symbol, ohlcvs.length, 'OHLCV candles received');
            // await exchange.sleep (60 * 1000) // sleep if necessary, though not required
        }
        catch (e) {
            console.log(exchange.iso8601(exchange.milliseconds()), exchange.id, symbol, e.constructor.name, e.message);
        }
    }
}
async function main() {
    const exchange = new ccxt.binance();
    await exchange.loadMarkets();
    // exchange.verbose = true // uncomment for debugging purposes if necessary
    const symbols = [
        'BTC/USDT', // unified symbols used here as opposed to exchange-specific market ids
        'ETH/USDT', // more about unified symbols vs exchange-specific ids here:
        'ADA/USDT', // https://github.com/ccxt/ccxt/wiki/Manual#markets
    ];
    const timeframe = '1m';
    const loops = symbols.map(symbol => symbolLoop(exchange, symbol, timeframe));
    await Promise.all(loops);
}
main();