Skip to main content

Accept payments with Stripe Checkout

Edit on Github

Stripe Checkout hosts the payment page for you. This server starts a checkout session and redirects the customer to it, then verifies the webhook Stripe sends when payment completes. On Deno, verify with the async constructEventAsync, which uses Web Crypto instead of Node APIs. Set STRIPE_SECRET_KEY, STRIPE_PRICE_ID, and STRIPE_WEBHOOK_SECRET.

import Stripe from "npm:stripe";

const stripe = new Stripe(Deno.env.get("STRIPE_SECRET_KEY")!);

async function handler(req: Request): Promise<Response> {
  const url = new URL(req.url);
Start a checkout session and send the customer to Stripe's hosted page.
  if (req.method === "POST" && url.pathname === "/checkout") {
    const session = await stripe.checkout.sessions.create({
      mode: "payment",
      line_items: [{ price: Deno.env.get("STRIPE_PRICE_ID")!, quantity: 1 }],
      success_url: "http://localhost:8000/success",
      cancel_url: "http://localhost:8000/cancel",
    });
    return Response.redirect(session.url!, 303);
  }
Stripe calls this URL when events happen. Always verify the signature so you know the request really came from Stripe.
  if (req.method === "POST" && url.pathname === "/webhook") {
    const signature = req.headers.get("stripe-signature")!;
    const body = await req.text();
    let event: Stripe.Event;
    try {
      event = await stripe.webhooks.constructEventAsync(
        body,
        signature,
        Deno.env.get("STRIPE_WEBHOOK_SECRET")!,
      );
    } catch (err) {
      return new Response(`Invalid signature: ${err}`, { status: 400 });
    }

    if (event.type === "checkout.session.completed") {
      const session = event.data.object;
      console.log(`Payment received for session ${session.id}`);
Fulfill the order here.
    }
    return new Response("ok");
  }

  return new Response("Not found", { status: 404 });
}

Deno.serve(handler);

Run this example locally using the Deno CLI:

deno run -N -E https://docs.deno.com/examples/scripts/stripe_checkout.ts

Additional resources

Did you find what you needed?

Privacy policy