How to enable Google Pay in Stripe?

How to Enable Google Pay in Stripe: A Comprehensive Tutorial

 

Step 1: Create a Stripe Account

 

Before setting up Google Pay with Stripe, ensure you have a Stripe account. If you don't have one yet:

• Visit Stripe's website
• Click on "Start now" or "Create account"
• Complete the registration process with your business details
• Verify your email address

 

Step 2: Install Stripe's JavaScript Library

 

Include Stripe's JavaScript library in your website. Add the following script tag to your HTML file, preferably just before the closing tag:

 

Step 3: Configure Your Stripe Account for Google Pay

 

In your Stripe Dashboard:

• Go to "Settings" > "Payment methods"
• Find "Google Pay" in the list of payment methods
• Click "Enable" or toggle the switch to activate Google Pay
• Confirm any additional requirements if prompted

 

Step 4: Set Up Your Payment Environment

 

Initialize the Stripe object with your publishable key in your JavaScript file:

// Initialize Stripe with your publishable key
const stripe = Stripe('pk_test_your_publishable_key');

// Create a payment request object
const paymentRequest = stripe.paymentRequest({
  country: 'US', // Replace with your country
  currency: 'usd', // Replace with your currency
  total: {
    label: 'Total',
    amount: 1000, // Amount in cents
  },
  requestPayerName: true,
  requestPayerEmail: true,
});

 

Step 5: Check if Google Pay is Available

 

Before showing the Google Pay button, check if the payment method is available for the user:

// Check the availability of the Payment Request API
paymentRequest.canMakePayment().then(function(result) {
  if (result && result.googlePay) {
    // Google Pay is available, show Google Pay button
    const googlePayButton = document.getElementById('google-pay-button');
    googlePayButton.style.display = 'block';
  } else {
    // Google Pay is not available, hide or disable the button
    console.log('Google Pay is not available in this browser');
  }
});

 

Step 6: Create a Payment Request Button Element

 

Add a container element in your HTML for the Google Pay button:

Then create the button using Stripe's Elements:

// Create a PaymentRequestButton element
const prButton = elements.create('paymentRequestButton', {
  paymentRequest: paymentRequest,
  style: {
    paymentRequestButton: {
      type: 'pay', // 'default', 'book', 'donate', or 'pay'
      theme: 'dark', // 'dark', 'light', or 'light-outline'
      height: '40px' // default is '40px', can be any custom value
    }
  }
});

// Check if the Payment Request is available before mounting
paymentRequest.canMakePayment().then(function(result) {
  if (result && result.googlePay) {
    prButton.mount('#google-pay-button');
  } else {
    document.getElementById('google-pay-button').style.display = 'none';
  }
});

 

Step 7: Handle the Payment

 

Listen for the 'paymentmethod' event to handle the payment when a user completes the Google Pay process:

paymentRequest.on('paymentmethod', function(event) {
  // Send the payment method ID to your server to complete the payment
  fetch('/create-payment-intent', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      paymentMethodId: event.paymentMethod.id,
      amount: 1000, // Amount in cents
    }),
  })
  .then(function(response) {
    return response.json();
  })
  .then(function(responseJson) {
    if (responseJson.error) {
      // Show error to your customer
      event.complete('fail');
      console.error(responseJson.error);
    } else {
      // The payment succeeded!
      event.complete('success');
      console.log('Payment successful!');
      // Handle post-payment actions like redirecting to a success page
    }
  })
  .catch(function(error) {
    // Show error to your customer
    event.complete('fail');
    console.error('Error:', error);
  });
});

 

Step 8: Create a Server-Side Endpoint to Handle Payments

 

Set up a server endpoint to process the payment. Here's an example using Node.js with Express:

const express = require('express');
const app = express();
const stripe = require('stripe')('sk_test_your_secret_key');

app.use(express.json());

app.post('/create-payment-intent', async (req, res) => {
  try {
    const { paymentMethodId, amount } = req.body;
    
    // Create a PaymentIntent with the payment method ID
    const paymentIntent = await stripe.paymentIntents.create({
      amount: amount,
      currency: 'usd',
      payment\_method: paymentMethodId,
      confirmation\_method: 'manual',
      confirm: true,
      return\_url: 'https://yourwebsite.com/success',
    });
    
    // Handle different PaymentIntent statuses
    if (
      paymentIntent.status === 'requires\_action' &&
      paymentIntent.next_action.type === 'use_stripe\_sdk'
    ) {
      // The payment requires additional actions
      res.json({
        requires\_action: true,
        payment_intent_client_secret: paymentIntent.client_secret,
      });
    } else if (paymentIntent.status === 'succeeded') {
      // The payment succeeded
      res.json({ success: true });
    } else {
      // The payment failed for some other reason
      res.json({
        error: 'Payment failed',
      });
    }
  } catch (error) {
    res.json({ error: error.message });
  }
});

app.listen(3000, () => {
  console.log('Server running on port 3000');
});

 

Step 9: Test Your Google Pay Implementation

 

To test your Google Pay integration:

• Use Stripe's test mode with your test API keys
• Make sure you're using a Chrome browser that supports Google Pay
• Use a device with Google Pay set up or a test card in a compatible browser
• Test the full payment flow using Stripe's test cards

Use this test card number for Google Pay testing: 4242 4242 4242 4242

 

Step 10: Go Live with Your Google Pay Integration

 

When you're ready to move to production:

• Switch from Stripe test keys to live keys
• Update your code to use the live Stripe publishable key
• Verify all URLs point to your production endpoints
• Perform final testing in a staging environment
• Launch your Google Pay-enabled checkout

 

Step 11: Implement Error Handling and Fallbacks

 

Add robust error handling to account for different scenarios:

// Add comprehensive error handling
paymentRequest.on('cancel', function() {
  console.log('User canceled the payment');
  // Handle cancellation (e.g., show a message or redirect)
});

// Fallback for browsers without Google Pay support
if (!window.PaymentRequest) {
  document.getElementById('google-pay-button').style.display = 'none';
  // Show alternative payment methods
  document.getElementById('alternative-payment-methods').style.display = 'block';
}

 

Step 12: Add Google Pay Branding

 

Ensure your implementation follows Google Pay's branding guidelines:

• Use official Google Pay buttons and logos
• Follow Google Pay brand guidelines
• Display the Google Pay logo near other payment method options

You can add custom Google Pay branding with CSS:

#google-pay-button {
  margin: 10px 0;
  max-width: 300px;
}

/_ Add Google Pay badge to your checkout page _/
.payment-method-options {
  display: flex;
  align-items: center;
}

.payment-method-badge {
  height: 24px;
  margin-right: 10px;
}

 

Step 13: Monitor Your Google Pay Integration

 

After going live:

• Monitor Stripe Dashboard for transaction data
• Set up webhooks to track payment events
• Analyze conversion rates for Google Pay vs. other payment methods
• Address any issues that arise promptly

Add webhook handling for better monitoring:

// Server-side webhook handling example
app.post('/webhook', express.raw({type: 'application/json'}), (req, res) => {
  const sig = req.headers['stripe-signature'];
  let event;

  try {
    event = stripe.webhooks.constructEvent(
      req.body,
      sig,
      'whsec_your_webhook_signing_secret'
    );
  } catch (err) {
    return res.status(400).send(`Webhook Error: ${err.message}`);
  }

  // Handle specific events
  switch (event.type) {
    case 'payment\_intent.succeeded':
      const paymentIntent = event.data.object;
      console.log(`PaymentIntent for ${paymentIntent.amount} was successful!`);
      // Then define and call a function to handle the successful payment
      break;
    case 'payment\_method.attached':
      const paymentMethod = event.data.object;
      console.log('PaymentMethod was attached to a Customer!');
      break;
    default:
      console.log(`Unhandled event type ${event.type}`);
  }

  res.json({received: true});
});

 

By following these detailed steps, you'll have a fully functional Google Pay integration with Stripe, offering your customers a seamless and secure payment experience.