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Google Pay

With Google Pay, you can make instant payments in a single flow. Please check settings:

https://stripe.com/docs/google-payhttps://stripe.com/docs/google-pay

And if you will work on the web, you should check "Payment Request Button" 's docs. Serve your application over HTTPS. This is a requirement both in development and in production. One way to get up and running is to use a service like ngrok.

https://stripe.com/docs/stripe-js/elements/payment-request-button?platform=html-js-testing-google-pay#html-js-prerequisiteshttps://stripe.com/docs/stripe-js/elements/payment-request-button?platform=html-js-testing-google-pay#html-js-prerequisites

🐾 Implements Guide

Prepare settings

For using Google Pay, you need some settings.

strings.xml

In file android/app/src/main/res/values/strings.xml add the these value.

  • publishable_key(Stripe's publoshable key)
  • enable_google_pay
  • country_code
  • merchant_display_name
  • google_pay_is_testing

These settings are used because Google Pay requires some processing to be done before initializing the plugin.

<string name="publishable_key">Your Publishable Key</string>
<bool name="enable_google_pay">true</bool>
<string name="country_code">US</string>
<string name="merchant_display_name">Widget Store</string>
<bool name="google_pay_is_testing">true</bool>

AndroidManifest.xml

In file android/app/src/main/AndroidManifest.xml, add the following XML elements under manifest > application. These call the values set in strings.xml.

<meta-data
  android:name="com.getcapacitor.community.stripe.publishable_key"
  android:value="@string/publishable_key"/>

<meta-data
  android:name="com.getcapacitor.community.stripe.enable_google_pay"
  android:value="@bool/enable_google_pay"/>

<meta-data
  android:name="com.google.android.gms.wallet.api.enabled"
  android:value="true" />

<meta-data
  android:name="com.getcapacitor.community.stripe.country_code"
  android:value="@string/country_code"/>

<meta-data
  android:name="com.getcapacitor.community.stripe.merchant_display_name"
  android:value="@string/merchant_display_name"/>

<meta-data
  android:name="com.getcapacitor.community.stripe.google_pay_is_testing"
  android:value="@bool/google_pay_is_testing"/>

Optional1: If you get user information, set these:

Added metadata options to specify what, if any, billing info to require from Google Pay. Add the following entries to strings.xml in the Android project to enable additional data:

In file android/app/src/main/res/values/strings.xml add the these value.

<bool name="email_address_required">true</bool>
<bool name="phone_number_required">true</bool>
<bool name="billing_address_required">true</bool>
<string name="billing_address_format">Full</string>

And in file android/app/src/main/AndroidManifest.xml, add the following XML elements under manifest > application.

<meta-data
  android:name="com.getcapacitor.community.stripe.email_address_required"
  android:value="@bool/email_address_required"/>

<meta-data
android:name="com.getcapacitor.community.stripe.phone_number_required"
android:value="@bool/phone_number_required"/>

<meta-data
android:name="com.getcapacitor.community.stripe.billing_address_required"
android:value="@bool/billing_address_required"/>

<meta-data
android:name="com.getcapacitor.community.stripe.billing_address_format"
android:value="@string/billing_address_format"/>

Optional2: If you don't require existing payment method at Googl Pay:

If false, Google Pay is considered ready even if the customer's Google Pay wallet does "not" have existing payment methods.
Default to true.

In file android/app/src/main/res/values/strings.xml add the these value.

<bool name="google_pay_existing_payment_method_required">false</bool>

And in file android/app/src/main/AndroidManifest.xml, add the following XML elements under manifest > application.

<meta-data
    android:name="com.getcapacitor.community.stripe.google_pay_existing_payment_method_required"
    android:value="@bool/google_pay_existing_payment_method_required"/>

1. isGooglePayAvailable

First, you should check to be able to use Google Pay on device.

import { Stripe, GooglePayEventsEnum } from '@capacitor-community/stripe';

(async () => {
  // Check to be able to use Google Pay on device
  const isAvailable = Stripe.isGooglePayAvailable().catch(() => undefined);
  if (isAvailable === undefined) {
    // disable to use Google Pay
    return;
  }
})();

This method return resolve(): void or reject('Not implemented on Device.').

method isGooglePayAvailable()

isGooglePayAvailable() => Promise<void>

2. createGooglePay

You should connect to your backend endpoint, and get every key. This is "not" function at this Plugin. So you can use HTTPClient , Axios , Ajax , and so on.

Stripe provide how to implement backend:
https://stripe.com/docs/payments/accept-a-payment?platform=ios#add-server-endpointhttps://stripe.com/docs/payments/accept-a-payment?platform=ios#add-server-endpoint

After that, you set these key to createGooglePay method.

(async () => {
  // Connect to your backend endpoint, and get paymentIntent.
  const { paymentIntent } = await this.http.post<{
    paymentIntent: string;
  }>(environment.api + 'payment-sheet', {}).pipe(first()).toPromise(Promise);

  // Prepare Google Pay
  await Stripe.createGooglePay({
    paymentIntentClientSecret: paymentIntent,

    // Web only. Google Pay on Android App doesn't need
    paymentSummaryItems: [{
      label: 'Product Name',
      amount: 1099.00
    }],
    merchantIdentifier: 'merchant.com.getcapacitor.stripe',
    countryCode: 'US',
    currency: 'USD',
  });
})();

method createGooglePay(...)

createGooglePay(options: CreateGooglePayOption) => Promise<void>

You can use options of CreateGooglePayOption on createGooglePay.

interface CreateGooglePayOption

Prop Type Description
paymentIntentClientSecret string
paymentSummaryItems { label: string; amount: number; }[] Web only need stripe-pwa-elements > 1.1.0
merchantIdentifier string Web only need stripe-pwa-elements > 1.1.0
countryCode string Web only need stripe-pwa-elements > 1.1.0
currency string Web only need stripe-pwa-elements > 1.1.0

3. presentGooglePay

present in createGooglePay is single flow. You don't need to confirm method.

(async () => {
  // Present Google Pay
  const result = await Stripe.presentGooglePay();
  if (result.paymentResult === GooglePayEventsEnum.Completed) {
    // Happy path
  }
})();

method presentGooglePay()

presentGooglePay() => Promise<{ paymentResult: GooglePayResultInterface; }>

GooglePayResultInterface is created from Enum of GooglePayEventsEnum. So you should import and check result.

type alias GooglePayResultInterface

GooglePayEventsEnum.Completed | GooglePayEventsEnum.Canceled | GooglePayEventsEnum.Failed

4. addListener

Method of Google Pay notify any listeners. If you want to get event of payment process is 'Completed', you should add GooglePayEventsEnum.Completed listener to Stripe object:

// be able to get event of Google Pay
Stripe.addListener(GooglePayEventsEnum.Completed, () => {
  console.log('GooglePayEventsEnum.Completed');
});

The event name you can use is GooglePayEventsEnum.

enum GooglePayEventsEnum

Members Value
Loaded "googlePayLoaded"
FailedToLoad "googlePayFailedToLoad"
Completed "googlePayCompleted"
Canceled "googlePayCanceled"
Failed "googlePayFailed"

📖 Reference

See the Stripe Documentation for more information. This plugin is wrapper, so there information seems useful for you.

Google Pay (Android)

This plugin use GooglePayLauncher on com.stripe:stripe-android:

https://stripe.com/docs/google-payhttps://stripe.com/docs/google-pay

Google Pay (Web)

This plugin use "Payment Request Button".

https://stripe.com/docs/stripe-js/elements/payment-request-button?platform=html-js-testing-google-pay#html-js-prerequisiteshttps://stripe.com/docs/stripe-js/elements/payment-request-button?platform=html-js-testing-google-pay#html-js-prerequisites

<?xml version='1.0' encoding='utf-8'?>
<resources>
    <string name="app_name">capacitor-stripe</string>
    <string name="title_activity_main">capacitor-stripe</string>
    <string name="package_name">io.ionic.starter</string>
    <string name="custom_url_scheme">io.ionic.starter</string>

    <string name="publishable_key">pk_test_YssveZBA1kucfaTfZbeDwauN</string>
    <bool name="enable_google_pay">true</bool>
    <string name="country_code">US</string>
    <string name="merchant_display_name">Widget Store</string>
    <bool name="google_pay_is_testing">true</bool>

    <bool name="email_address_required">true</bool>
    <bool name="phone_number_required">true</bool>
    <bool name="billing_address_required">true</bool>
    <string name="billing_address_format">Full</string>
  
    <bool name="google_pay_existing_payment_method_required">false</bool>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="io.ionic.starter">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|smallestScreenSize|screenLayout|uiMode"
            android:name="io.ionic.starter.MainActivity"
            android:label="@string/title_activity_main"
            android:theme="@style/AppTheme.NoActionBarLaunch"
            android:launchMode="singleTask">

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

        </activity>

        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths"></meta-data>
        </provider>

        <meta-data
          android:name="com.google.android.gms.wallet.api.enabled"
          android:value="true" />

        <meta-data
          android:name="com.getcapacitor.community.stripe.enable_google_pay"
          android:value="@bool/enable_google_pay"/>

        <meta-data
          android:name="com.getcapacitor.community.stripe.publishable_key"
          android:value="@string/publishable_key"/>

        <meta-data
          android:name="com.getcapacitor.community.stripe.country_code"
          android:value="@string/country_code"/>

        <meta-data
          android:name="com.getcapacitor.community.stripe.merchant_display_name"
          android:value="@string/merchant_display_name"/>

        <meta-data
          android:name="com.getcapacitor.community.stripe.google_pay_is_testing"
          android:value="@bool/google_pay_is_testing"/>

        <meta-data
          android:name="com.getcapacitor.community.stripe.email_address_required"
          android:value="@bool/email_address_required"/>
  
        <meta-data
          android:name="com.getcapacitor.community.stripe.phone_number_required"
          android:value="@bool/phone_number_required"/>
  
        <meta-data
          android:name="com.getcapacitor.community.stripe.billing_address_required"
          android:value="@bool/billing_address_required"/>
  
        <meta-data
          android:name="com.getcapacitor.community.stripe.billing_address_format"
          android:value="@string/billing_address_format"/>

        <meta-data
          android:name="com.getcapacitor.community.stripe.google_pay_existing_payment_method_required"
          android:value="@string/google_pay_existing_payment_method_required"/>
    </application>

    <!-- Permissions -->

    <uses-permission android:name="android.permission.INTERNET" />
</manifest>


import { Stripe, GooglePayEventsEnum } from '@capacitor-community/stripe';

(async () => {
  // Check to be able to use Google Pay on device
  const isAvailable = Stripe.isGooglePayAvailable().catch(() => undefined);
  if (isAvailable === undefined) {
    // disable to use Google Pay
    return;
  }
  
  Stripe.addListener(GooglePayEventsEnum.Completed, () => {
    console.log('GooglePayEventsEnum.Completed');
  });
  
  // Connect to your backend endpoint, and get paymentIntent.
  const { paymentIntent } = await this.http.post<{
    paymentIntent: string;
  }>(environment.api + 'payment-sheet', {}).pipe(first()).toPromise(Promise);

  // Prepare Google Pay
  await Stripe.createGooglePay({
    paymentIntentClientSecret: paymentIntent,

    // Web only. Google Pay on Android App doesn't need
    paymentSummaryItems: [{
      label: 'Product Name',
      amount: 1099.00
    }],
    merchantIdentifier: 'merchant.com.getcapacitor.stripe',
    countryCode: 'US',
    currency: 'USD',
  });

  // Present Google Pay
  const result = await Stripe.presentGooglePay();
  if (result.paymentResult === GooglePayEventsEnum.Completed) {
    // Happy path
  }
})();