Build a custom checkout page that includes Link

First, create a Stripe account or sign in.

Use our official libraries to access the Stripe API from your application:

# Available as a gem
sudo gem install stripe

# If you use bundler, you can add this line to your Gemfile
gem 'stripe'

Stripe uses a PaymentIntent object to represent your intent to collect payment from a customer, tracking charge attempts and payment state changes throughout the process.

You can accept payments with Link using information your customer stores in the Link app. Because you don’t use the Link payment_method.type, when you receive a payment from a customer using Link in the Payment Element, the payment_method.type listed for the payment is card.

To use the Link payment_method.type, update your integration to set payment_method_types to link. Alternatively, you can set automatic_payment_methods to enabled and let Stripe dynamically display the most relevant payment methods to your customers.

curl https://api.stripe.com/v1/payment_intents \
  -u "
sk_test_4eC39HqLyjWDarjtT1zdp7dc
:" \
  -d amount=1099 \
  -d currency=eur \
  -d "automatic_payment_methods[enabled]"=true

curl https://api.stripe.com/v1/payment_intents \
  -u 
sk_test_4eC39HqLyjWDarjtT1zdp7dc
: \
  -d "amount"=1099 \
  -d "currency"="usd" \
  -d "automatic_payment_methods[enabled]"=true

Retrieve the client secret

The PaymentIntent includes a client secret that the client side uses to securely complete the payment process. You can use different approaches to pass the client secret to the client side.

get '/secret' do
  intent = # ... Create or retrieve the PaymentIntent
  {client_secret: intent.client_secret}.to_json
end

(async () => {
  const response = await fetch('/secret');
  const {client_secret: clientSecret} = await response.json();
  // Render the form using the clientSecret
})();

Link authenticates a customer by using their email address. Depending on your checkout flow, you have the following options: pass an email to the Payment Element, collect it directly within the Payment Element, or use the Link Authentication Element. Of these, Stripe recommends passing a customer email address to the Payment Element if available.

Pass in an email

Collect an email

Use the Link Authentication Element

If any of the following apply to you:

• You want a single, optimized component for email collection and Link authentication.
• You need to collect a shipping address from your customer.

Then use the integration flow that implements these elements: the Link Authentication Element, Payment Element and optional Address Element.

A Link-enabled checkout page has the Link Authentication Element at the beginning, followed by the Address Element, and the Payment Element at the end. You can also display the Link Authentication Element on separate pages, in this same order, for multi-page checkout flows.

Create a payment form using multiple Elements

The integration works as follows:

Now you can set up your custom payment form with the Elements prebuilt UI components. Your payment page address must start with https:// rather than http:// for your integration to work. You can test your integration without using HTTPS. Enable HTTPS when you’re ready to accept live payments.

npm install --save @stripe/react-stripe-js @stripe/stripe-js

import {loadStripe} from "@stripe/stripe-js";
import {
  Elements,
  LinkAuthenticationElement,
  PaymentElement,
} from "@stripe/react-stripe-js";

const stripe = loadStripe(
'pk_test_TYooMQauvdEDq54NiTphI7jx');

// Customize the appearance of Elements using the Appearance API.
const appearance = {/* ... */};

// Enable the skeleton loader UI for the optimal loading experience.
const loader = 'auto';

<linkAuthenticationElement onChange={(event) => {
  setEmail(event.value.email);
}} />

<linkAuthenticationElement options={{defaultValues: {email: 'foo@bar.com'}}}/>

Use stripe.confirmPayment to complete the payment with details collected from your customer in the different Elements forms. Provide a return_url to this function to indicate where Stripe redirects the user after they complete the payment.

Your user might be first redirected to an intermediate site, like a bank authorization page, before Stripe redirects them to the return_url.

By default, card and bank payments immediately redirect to the return_url when a payment is successful. If you don’t want to redirect to the return_url, you can use if_required to change the behavior.

import {loadStripe} from "@stripe/stripe-js";
import {
  useStripe,
  useElements,
  Elements,
  LinkAuthenticationElement,
  PaymentElement,
  // If collecting shipping
  AddressElement,
} from "@stripe/react-stripe-js";

const stripe = loadStripe(
'pk_test_TYooMQauvdEDq54NiTphI7jx');

const appearance = {/* ... */};

// Enable the skeleton loader UI for the optimal loading experience.
const loader = 'auto';

const CheckoutPage =({clientSecret}) => (
  <Elements stripe={stripe} options={{clientSecret, appearance, loader}}>
    <CheckoutForm />
  </Elements>
);

export default function CheckoutForm() {
  const stripe = useStripe();
  const elements = useElements();

  const handleSubmit = async (event) => {
    event.preventDefault();

    const {error} = await stripe.confirmPayment({
      elements,
      confirmParams: {
        return_url: "https://example.com/order/123/complete",
      },
    });

    if (error) {
      // handle error
    }
  };

  return (
    <form onSubmit={handleSubmit}>
      <h3>Contact info</h3>
      <LinkAuthenticationElement />
      {/* If collecting shipping */}
      <h3>Shipping</h3>
      <AddressElement options={{mode: 'shipping', allowedCountries: ['US']}} />
      <h3>Payment</h3>
      <PaymentElement />

      <button type="submit">Submit</button>
    </form>
  );
}

The return_url corresponds to a page on your website that provides the payment status of the PaymentIntent when you render the return page. When Stripe redirects the customer to the return_url, you can use the following URL query parameters to verify payment status. You can also append your own query parameters when providing the return_url. These query parameters persist through the redirect process.

Stripe sends a payment_intent.succeeded event when the payment completes. Use a webhook to receive these events and run actions, like sending an order confirmation email to your customer, logging the sale in a database, or starting a shipping workflow.

Configure your integration to listen for these events rather than waiting on a callback from the client. When you wait on a callback from the client, the customer can close the browser window or quit the app before the callback executes. Setting up your integration to listen for asynchronous events enables you to accept different types of payment methods with a single integration.

In addition to handling the payment_intent.succeeded event, you can also handle two other important events when collecting payments with the Payment Element:

Currently, Link only works with credit cards, debit cards, and qualified US bank account purchases. Link requires domain registration.

You can create test mode accounts for Link using any valid email address. The following table shows the fixed one-time passcode values that Stripe accepts for authenticating test mode accounts:

For testing specific payment methods, refer to the Payment Element testing examples.

Multiple funding sources

As Stripe adds additional funding source support, you don’t need to update your integration. Stripe automatically supports them with the same transaction settlement time and guarantees as card and bank account payments.

Card authentication and 3D Secure

Link supports 3D Secure 2 (3DS2) authentication for card payments. 3DS2 requires customers to complete an additional verification step with the card issuer when paying. Payments that have been successfully authenticated using 3D Secure are covered by a liability shift.

To trigger 3DS2 authentication challenge flows with Link in test mode, use the following test card with any CVC, postal code, and future expiration date: 4000000000003220

.

In test mode, the authentication process displays a mock authentication page. On that page, you can either authorize or cancel the payment. Authorizing the payment simulates successful authentication and redirects you to the specified return URL. Clicking the Failure button simulates an unsuccessful attempt at authentication.

For more details, refer to the 3D Secure authentication page.