Bittrex Fetch Closed Orders History

import ccxt from '../../js/ccxt.js';
import ololog from 'ololog';
import asTable from 'as-table';


const { noLocate } = ololog;
const log = noLocate;

const exchange = new ccxt.bittrex ({
       'enableRateLimit': true,
       'apiKey': 'YOUR_API_KEY',
       'secret': 'YOUR_API_SECRET',
   });(async () => {

   await exchange.loadMarkets ()

   const symbol = 'ETH/BTC'
       , market = exchange.markets[symbol]
       , startingDate = '2017-01-01T00:00:00'
       , now = exchange.milliseconds ()

   log.bright.green ('\nFetching history for:', symbol, '\n')

   let allOrders = []
   let since = exchange.parse8601 (startingDate)

   while (since < now) {

       try {

           log.bright.blue ('Fetching history for', symbol, 'since', exchange.iso8601 (since))
           const orders = await exchange.fetchClosedOrders (symbol, since)
           log.green.dim ('Fetched', orders.length, 'orders')

           allOrders = allOrders.concat (orders)

           if (orders.length) {

               const lastOrder = orders[orders.length - 1]
               since = lastOrder['timestamp'] + 1

           } else {

               break // no more orders left for this symbol, move to next one
           }

       } catch (e) {

           log.red.unlimited (e)

       }
   }

   // omit the following keys for a compact table output
   // otherwise it won't fit into the screen width
   const omittedKeys = [
       'info',
       'timestamp',
       'lastTradeTimestamp',
       'fee',
   ]

   log.yellow (asTable (allOrders.map (order => exchange.omit (order, omittedKeys))))
   log.green ('Fetched', allOrders.length, symbol, 'orders in total')

   // do whatever you want to do with them, calculate profit loss, etc...

}) ()