MB WAY paymentsSur invitation uniquement

Learn how to accept the MB WAY payment method.

MB WAY is a digital wallet payment method in Portugal. When paying with MB WAY, customers initiate payments using their phone number, and authenticate and approve them using their MB WAY app.

You get immediate notification of whether the payment succeeded or failed.

Remarque

MB WAY supports international phone numbers, but the majority of customers use a Portuguese phone number starting with +351. You can test your integration in a sandbox using test phone numbers.

Mise en garde

Stripe automatically presents your customers payment method options by evaluating their currency, payment method restrictions, and other parameters. We recommend that you configure your payment methods from the Stripe Dashboard using the instructions in Accept a payment.

If you want to continue manually configuring the payment methods you present to your customers with Checkout, use this guide. Otherwise, update your integration to configure payment methods in the Dashboard.

Set up Stripe
Server-side

First, create a Stripe account or sign in.

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

Create a PaymentIntent
Server-side

A PaymentIntent is an object that represents your intent to collect a payment from a customer and tracks the payment process. To create a PaymentIntent that accepts a MB WAY payment method, specify the amount to collect, eur as the currency, and mb_way in the payment_method_types list. If you maintain a list of payment method types that you pass when creating a PaymentIntent, add mb_way to it.

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.

Retrieve the client secret from an endpoint on your server, using the browser’s fetch function. This approach is best if your client side is a single-page application, particularly one built with a modern frontend framework like React. Create the server endpoint that serves the client secret:

And then fetch the client secret with JavaScript on the client side:

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

Collect payment details
Client-side

Collect payment details on the client with the Payment Element. The Payment Element is a prebuilt UI component that simplifies collecting payment details for a variety of payment methods.

The Payment Element contains an iframe that securely sends payment information to Stripe over an HTTPS connection. Avoid placing the Payment Element within another iframe because some payment methods require redirecting to another page for payment confirmation.

The checkout page address must start with https:// rather than http:// for your integration to work. You can test your integration without using HTTPS, but remember to enable it when you’re ready to accept live payments.

Set up Stripe.js

The Payment Element is automatically available as a feature of Stripe.js. Include the Stripe.js script on your checkout page by adding it to the head of your HTML file. Always load Stripe.js directly from js.stripe.com to remain PCI compliant. Don’t include the script in a bundle or host a copy of it yourself.

checkout.html
<head>
  <title>Checkout</title>
  <script src="https://js.stripe.com/v3/"></script>
</head>

Create an instance of Stripe with the following JavaScript on your checkout page:

checkout.js
// Set your publishable key: remember to change this to your live publishable key in production
// See your keys here: https://dashboard.stripe.com/apikeys
const stripe = Stripe('pk_test_TYooMQauvdEDq54NiTphI7jx'
, {
  betas: 'mb_way_pm_beta_1',
});

Add the Payment Element to your payment page

The Payment Element needs a place to live on your payment page. Create an empty DOM node (container) with a unique ID in your payment form:

checkout.html
<form id="payment-form">
  <div id="payment-element">
    <!-- Elements will create form elements here -->
  </div>
  <button id="submit">Submit</button>
  <div id="error-message">
    <!-- Display error message to your customers here -->
  </div>
</form>

When the previous form loads, create an instance of the Payment Element and mount it to the container DOM node. Pass the client secret from the previous step into options when you create the Elements instance:

Handle the client secret carefully because it can complete the charge. Don’t log it, embed it in URLs, or expose it to anyone but the customer.

checkout.js
const options = {
  clientSecret: '{{CLIENT_SECRET}}',
  // Fully customizable with appearance API.
  appearance: {/*...*/},
};

// Set up Stripe.js and Elements to use in checkout form, passing the client secret obtained in a previous step
const elements = stripe.elements(options);
// Optional: Autofill user's saved payment methods. If the customer's
// email is known when the page is loaded, you can pass the email
// to the linkAuthenticationElement on mount:
//
//   linkAuthenticationElement.mount("#link-authentication-element",  {
//     defaultValues: {
//       email: 'jenny.rosen@example.com',
//     }
//   })

// Create and mount the Payment Element
const paymentElementOptions = { layout: 'accordion'};
const paymentElement = elements.create('payment', paymentElementOptions);
paymentElement.mount('#payment-element');

Submit the payment to Stripe
Client-side

Use stripe.confirmPayment to complete the payment using details from the Payment Element. This sends an authorization request to the buyer.

Remarque

stripe.confirmPayment might take several seconds to complete while waiting for customers to authorize the payment. During that time, disable your form from being resubmitted and show a waiting indicator like a spinner. If you receive an error, show it to the customer, re-enable the form, and hide the waiting indicator.

checkout.js
const form = document.getElementById('payment-form');

form.addEventListener('submit', async (event) => {
  event.preventDefault();

  const {error, paymentIntent} = await stripe.confirmPayment({
    //`Elements` instance that was used to create the Payment Element
    elements,
    redirect: 'if_required',
  });

  const message = document.querySelector('#message')
  if (error) {
    // This point will only be reached if there is an immediate error when
    // confirming the payment. Show error to your customer (for example, payment
    // details incomplete)
    message.innerText = error.message;
  } else {
    // This will execute if the confirm request is successful, or if the
    // payment fails asynchronously.
    switch (paymentIntent.status) {
      case 'succeeded':
        message.innerText = 'Success! Payment received.';
        break;

      case 'requires_payment_method':
        message.innerText = 'Payment failed. Please try another payment method.';
        // Redirect your user back to your payment page to attempt collecting
        // payment again
        break;

      default:
        message.innerText = 'Something went wrong.';
        break;
    }
  }
});

Test your integration

Test your MB WAY integration by using the following test phone numbers. Each set of details reproduces a common live mode scenario.

Phone number	Description

`+351911111112`	The PaymentIntent status transitions from `requires_action` to `succeeded` after 15 seconds.
`+351911111113`	The PaymentIntent status transitions from `requires_action` to `requires_payment_method` immediately. Stripe returns the `payment_method_not_available` error code.
`+351911111114`	The PaymentIntent status transitions from `requires_action` to `requires_payment_method` immediately. Stripe returns the `payment_method_provider_decline` error code.
`+351911111115`	The PaymentIntent status transitions from `requires_action` to `requires_payment_method` immediately. Stripe returns the `payment_intent_payment_attempt_expired` error code.
`+351911111116`	The PaymentIntent status transitions from `requires_action` to `requires_payment_method` immediately. Stripe returns the `payment_method_customer_decline` error code.
`<any other number>`	The PaymentIntent status immediately transitions from `requires_action` to `succeeded`.

Remarque

MB WAY paymentsSur invitation uniquement

Learn how to accept the MB WAY payment method.

Remarque

Mise en garde

Set up StripeServer-side

Create a PaymentIntentServer-side

Retrieve the client secret

Collect payment detailsClient-side

Set up Stripe.js

Add the Payment Element to your payment page

Submit the payment to StripeClient-side

Remarque

Test your integration

FacultatifHandle post-payment events

Set up Stripe
Server-side

Create a PaymentIntent
Server-side

Collect payment details
Client-side

Submit the payment to Stripe
Client-side