03.js

const response2 = [
  { transactionId: 1, productName: 'Desk' },
  { transactionId: 2, productName: 'Clock' },
];

const requiredResponse2Output = [
  { id: 1, product: { name: 'Desk' } },
  { id: 2, product: { name: 'Clock' } },
];