Explain What Your Code Does

I can walk a teammate through a function step by step: what it takes, what it does and what it returns.

You opened a pull request in the orders service. Before Alex reviews it, he asks you to walk him through one small function.

orders/service.ts

async function getOrder(id: string) {

const order = await db.orders.findById(id);

if (!order) {

throw new NotFoundError('Order not found');

}

return order;

}

Read it from top to bottom: look up the order, handle the missing order, return the order. You will explain it in the same three steps.

Your mission

Explain getOrder step by step: what it takes, what it checks and what it returns.