Fetch All Tickers To Files 2

import ccxt from '../../js/ccxt.js';
import { writeFileSync } from 'fs';
import path from 'path';

const enableRateLimit = true, exchanges = {}, tickers = {};


ccxt.exchanges.forEach (id => {
   try {
       const exchange = new ccxt[id] ()
       if (exchange.has['fetchTickers']) {
           exchanges[id] = exchange
       }
   } catch (e) {
       console.log ('Failed to initialize', id, e.constructor.name, e.message)
   }
})

async function main () {

   console.log ('Started')
   const start = Date.now ()

   try {
       const promises = Object.values (exchanges).map (exchange => (
           (async () => {
               console.log (exchange.id)
               try {
                   const response = await exchange.fetchTickers ()
                   tickers[exchange.id] = response
               } catch (e) {
                   console.log ('Failed to fetchTickers() from', exchange.id)
               }
           }) ()
       ))
       await Promise.all (promises)
   } catch (e) {
       console.log ('Failed awaiting all exchanges to complete')
   }

   Object.entries (tickers).forEach (([ id, response ]) => {
       const folder = 'C:/myproject/tickers'
       const filename = `${id}-tickers.json`
       console.log (path.join (folder, filename))
       writeFileSync (path.join (folder, filename), JSON.stringify (response))
   })

   const end = Date.now ()
   console.log (`Fetched tickers in ${(end - start) / 1000} seconds`)

}

main ()