Esquema basico para consumo api interna cryptomkt

gist.js

(()=>{

    // your logic here 
    function init() {

        console.log(helpers.getBalance())
    }

    const helpers = 
    {      
        getBalance: (currency = 'ARS') => {
            return window.balances.find(x=>x.currency_name === currency)    
        }
    }

    init();
})();