Gemini 3.1 Pro Preview vs GPT-5.6 Lunafor coding

Here are the two best ways to refactor this, depending on whether you want to completely modernize the function to return a Promise, or if you need to maintain the original callback (`cb`) signature for backwards compatibility.

### Option 1: Pure `async/await` (Recommended)
If you are updating the surrounding code to support Promises, you can drop the callback entirely. In an `async` function, if any `await`ed Promise rejects, the error automatically bubbles up and rejects the returned Promise. **No errors are swallowed.**

```javascript
async…

If the functions return promises:

```js
async function getUserTotals(id) {
  const user = await getUser(id);
  const orders = await getOrders(user.id);
  return getTotals(orders);
}
```

Any error from `getUser`, `getOrders`, or `getTotals` automatically propagates as a rejected promise:

```js
try {
  const totals = await getUserTotals(id);
  console.log(totals);
} catch (err) {
  console.error(err);
}
```

If the existing functions are callback-based, promisify them first:

```js
const { promisify } = require("node:util");

const getUserAsyn…