The checkout flow

1. Create a Session: Create a Checkout Session on your server with a specific amount for the customer’s order.

2. Initialize Checkout components: Pass the session’s client_secret to your storefront and inititalize Checkout with the it. Create the desired components.

3. Display order confirmation: After payment completion, the Checkout component will emit an event indicating that the payment was successful. Show a success message or redirect the customer to an order confirmation page.

4. Fulfill order: Listen for the checkout_session.completed API event on your server. Once received, you can safely fulfill the customer’s order.