Function handler

src/pages/api/checkout_sessions/[id].ts:9–24

(req: NextApiRequest, res: NextApiResponse)

});

export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  const id: string = req.query.id as string;
  try {
    if (!id.startsWith("cs_")) {
      throw Error("Incorrect CheckoutSession ID.");
    }
    const checkout_session: Stripe.Checkout.Session = await stripe.checkout.sessions.retrieve(id, {
      expand: ["payment_intent"],
    });

    res.status(200).json(checkout_session);
  } catch (err) {
    const errorMessage = err instanceof Error ? err.message : "Internal server error";
    res.status(500).json({ statusCode: 500, message: errorMessage });
  }
}