Promisified a callback function

promisify.js

const { promisify } = require("util");

const getCustomerInfo = (callback) => {
  setTimeout(
    () => callback(null, { name: "John Doe", birthdate: "1967-04-14" }),
    1000
  );
};
const getCustomerInfoAsync = promisify(getCustomerInfo);

const callback = () => {
  getCustomerInfo((err, customerInfo) => {
    console.log(customerInfo);
  });
};

const promisified = async () => {
  const customerInfo = await getCustomerInfoAsync();
  console.log(customerInfo);
};

const main = () => {
  callback();
  promisified();
};

main();