To start working with Flutter Poolakey, you need to add its dependency in your project's pubspec.yaml file:

dependencies:
  flutter_poolakey: ^2.2.0+1.0.0

Then run the below command to retrieve it:

flutter packages get

And then Go to the allprojects section of your project gradle file and add the JitPack repository to the repositories block:

allprojects {
  repositories {
    // add JitPack
    maven { url 'https://jitpack.io' }
  }
} 

Now in your Dart code, you can use:

import 'package:flutter_poolakey/flutter_poolakey.dart';

For more information regarding the usage of flutter Poolakey, please check out the wiki page.

There is a fully functional sample application that demonstrates the usage of flutter Poolakey, all you have to do is cloning the project and running the app module.

Poolakey is an Android In-App Billing SDK for Cafe Bazaar App Store.