Load All Symbols At Once

// @NO_AUTO_TRANSPILE
import ccxt from '../../js/ccxt.js';
import ololog from 'ololog';
import ansicolor from 'ansicolor';
const log = ololog.configure({ locate: false });
ansicolor.nice;
//-----------------------------------------------------------------------------
process.on('uncaughtException', e => { log.bright.red.error(e); process.exit(1); });
process.on('unhandledRejection', e => { log.bright.red.error(e); process.exit(1); });
//-----------------------------------------------------------------------------
let test = async function (exchange) {
    try {
        await exchange.loadMarkets();
        log(exchange.id.green, 'loaded', exchange.symbols.length.toString().bright.green, 'symbols');
    }
    catch (e) {
        if (e instanceof ccxt.DDoSProtection) {
            log.bright.yellow(exchange.id, '[DDoS Protection] ' + e.message);
        }
        else if (e instanceof ccxt.RequestTimeout) {
            log.bright.yellow(exchange.id, '[Request Timeout] ' + e.message);
        }
        else if (e instanceof ccxt.AuthenticationError) {
            log.bright.yellow(exchange.id, '[Authentication Error] ' + e.message);
        }
        else if (e instanceof ccxt.ExchangeNotAvailable) {
            log.bright.yellow(exchange.id, '[Exchange Not Available] ' + e.message);
        }
        else if (e instanceof ccxt.ExchangeError) {
            log.bright.yellow(exchange.id, '[Exchange Error] ' + e.message);
        }
        else if (e instanceof ccxt.NetworkError) {
            log.bright.yellow(exchange.id, '[Network Error] ' + e.message);
        }
        else {
            throw e;
        }
    }
};
//-----------------------------------------------------------------------------
let exchanges = [];
async function main() {
    // instantiate all exchanges
    await Promise.all(ccxt.exchanges.map(async (id) => {
        let exchange = new (ccxt)[id]();
        exchanges.push(exchange);
        await test(exchange);
    }));
    let succeeded = exchanges.filter(exchange => exchange.markets ? true : false).length.toString().bright.green;
    let failed = exchanges.filter(exchange => exchange.markets ? false : true).length.toString().bright.red;
    let total = ccxt.exchanges.length.toString().bright.white;
    let numSymbols = 0;
    exchanges.map(exchange => {
        numSymbols += exchange.symbols ? exchange.symbols.length : 0;
    });
    log(numSymbols, 'symbols from', succeeded, 'of', total, 'exchanges loaded', ('(' + failed + ' errors)').red);
}
main();