Package detailsv4.0.0

pay

A plug-in to add support for payments on Flutter applications.

AndroidiOS

pub.dev API documentation Source code

30-day downloads: 114K
Likes: 1.1K
Pub points: 160

Install package

flutter pub add pay

Package Overview

Package selection guidance compiled from public package information, community data, and project usage.

The pay package is a Flutter plugin that enables payment functionality in mobile applications, providing integration with Google Pay for Android and iOS. It allows developers to securely process payments, manage payment methods, and handle transactions within their apps. Designed by Google, it simplifies the implementation of payment flows using standardized APIs. The plugin supports both major platforms and ensures compliance with security best practices. It is ideal for e-commerce, subscription-based services, and any app requiring in-app payment processing.

Use cases

In-app purchases
Subscription billing
E-commerce checkout
Digital goods purchase
Mobile wallet integration

Key features

Google Pay integration
Cross-platform support (Android & iOS)
Secure payment handling
Simple API for payment requests
Supports multiple payment methods

Suitable for

E-commerce apps
Subscription services
Mobile wallets
Payment-enabled marketplaces
Apps requiring secure transactions

Considerations

Requires Google Pay setup on devices
Needs proper configuration for production
Depends on platform-specific payment gateways
Limited to Google Pay ecosystem
May require additional backend validation

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

A plugin to add payments to your Flutter application.

_pay	_{pay_android}	_{pay_ios}	_{pay_platform_interface}

Platform Support

Android	iOS
Google Pay	Apple Pay

Getting started

Before you start, create an account with the payment providers you are planning to support and follow the setup instructions:

Apple Pay:

Take a look at the integration requirements.
Create a merchant identifier for your business.
Create a payment processing certificate to encrypt payment information.

Google Pay:

Take a look at the integration requirements.
Sign up to the business console and create an account.

Installation

This adds the pay package to the list of dependencies in your pubspec.yaml file with the following command:

flutter pub add pay

Usage

Define the configuration for your payment provider(s). Take a look at the parameters available in the documentation for Apple Pay and Google Pay, and explore the sample configurations in this package.

Example

This snippet assumes the existence of a payment configuration for Apple Pay (defaultApplePayConfig) and another one for Google Pay (defaultGooglePayConfig):

import 'package:pay/pay.dart';
import 'payment_configurations.dart' as payment_configurations;

const _paymentItems = [
  PaymentItem(
    label: 'Total',
    amount: '99.99',
    status: PaymentItemStatus.final_price,
  )
];

ApplePayButton(
  paymentConfiguration: payment_configurations.defaultApplePayConfig,
  paymentItems: _paymentItems,
  style: ApplePayButtonStyle.black,
  type: ApplePayButtonType.buy,
  margin: const EdgeInsets.only(top: 15.0),
  onPaymentResult: onApplePayResult,
  loadingIndicator: const Center(
    child: CircularProgressIndicator(),
  ),
),

GooglePayButton(
  paymentConfiguration: payment_configurations.defaultGooglePayConfig,
  paymentItems: _paymentItems,
  type: GooglePayButtonType.buy,
  margin: const EdgeInsets.only(top: 15.0),
  onPaymentResult: onGooglePayResult,
  loadingIndicator: const Center(
    child: CircularProgressIndicator(),
  ),
),

void onApplePayResult(paymentResult) {
  // Send the resulting Apple Pay token to your server / PSP
}

void onGooglePayResult(paymentResult) {
  // Send the resulting Google Pay token to your server / PSP
}

To learn more about the pay plugin and alternative integration paths, check out the readme in the pay folder.

Other packages in this plugin

The packages in this repository follow the federated plugin architecture. Each package has a specific responsibility and can be used independently to fulfil less conventional integration needs:

Package	Description	When to use
pay	An app-facing package with support for all the platforms supported by this plugin.	This package offers an agnostic integration for the platforms supported in this plugin and features the easiest path to add payments to your Flutter application.
pay_android	The endorsed implementation of this plugin for Android.	This package contains the necessary business logic to support the Android platform. You can integrate this package separately or use it to build your own app-facing package.
pay_ios	The endorsed implementation of this plugin for iOS.	This package contains the necessary business logic to support the iOS platform. You can integrate this package separately or use it to build your own app-facing package.
pay_platform_interface	A common API contract for platform-specific implementations.	Folow the contract in this package to add new platforms to the plugin or create your own Android or iOS implementations. Take a look at the guide about plugin development to learn more.

Additional resources

Check out the following resources to manage your payment accounts and learn more about the APIs for the supported providers:

	Google Pay	Apple Pay
Platforms	Android	iOS
Documentation	Overview	Overview
Console	Google Pay Business Console	Developer portal
Reference	API reference	Apple Pay API
Style guidelines	Brand guidelines	Buttons and Marks