Fetch Okex Futures

import ccxt from '../../js/ccxt.js';

async function test () {

   const exchange = new ccxt.okex ()
   await exchange.loadMarkets ()

   for (let symbol in exchange.markets) {

       const market = exchange.markets[symbol]

       if (market['future']) {
           console.log ('----------------------------------------------------')
           console.log (symbol, await exchange.fetchTicker (symbol))
           await ccxt.sleep (exchange.rateLimit)
       }
   }
}

test ()