Consulta de ticker cada x segundos con api interna de cryptomkt

cryptoapi.ticker.js

(()=>{

  function init() {
    const balance = helpers.getAvailableBalance()
    console.log(`Balance disponible ${balance} ARS`)
  }

  function update() {
    const coin = 'XLM'
    const ticker = helpers.getTicker(coin)
    console.log(coin, ticker)
  }

  /** config */
  const config = {
    base: 'ARS',
    interval: 5, // segundos
  }

  /** helpers */
  const helpers = {
  
    getTicker: (coin = 'ETH') => {

        const ticker = window.board[coin+config.base]

        return {
            bid: ticker.BID,
            ask: ticker.ASK,
            spread: ticker.ASK - ticker.BID
        }
      },

      getBalance: (currency = 'ARS') => {

          return window.balances.find(x=>x.currency_name === currency)    
      },

      getAvailableBalance: (currency = 'ARS') => {

          return parseFloat(helpers.getBalance(currency).disponible).toFixed(2);
      },
  }

  init()
  update()
  setInterval(update, config.interval * 1000)
})()