Implemented validateReceiptIos and validateReceiptAndroid.

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.7.1
+* Implemented receiptValidation for both android and ios.
+  - In Android, you need own backend to get your `accessToken`.
+
 ## 0.7.0
 * Addition of Amazon In-App Purchases.
 

README.md

@@ -5,7 +5,6 @@
 
 In App Purchase plugin for flutter. This project has been `forked` from [react-native-iap](https://github.com/dooboolab/react-native-iap). We are trying to share same experience of `in-app-purchase` in `flutter` as in `react-native`.
 We will keep working on it as time goes by just like we did in `react-native-iap`.
-Please give stars in github repository because we want to share this project in [opencollective](https://opencollective.com/react-native-iap). We need at least 100 stars to be there. Please help us to maintain and get more sponsors and backers.
 
 `PR` is always welcomed.
 
@@ -37,6 +36,8 @@ For help on editing plugin code, view the [documentation](https://flutter.io/dev
 | consumePurchase | `String` Purchase token | `String` | Consume a product (on Android.) No-op on iOS. |
 | endConnection | | `String` | End billing connection (on Android.) No-op on iOS. |
 | consumeAllItems | | `String` | Manually consume all items in android. Do NOT call if you have any non-consumables (one time purchase items). No-op on iOS. |
+| validateReceiptIos | `Map<String,String>` receiptBody, `bool` isTest | `http.Response` | Validate receipt for ios. |
+| validateReceiptAndroid | `String` packageName, `String` productId, `String` productToken, `String` accessToken, `bool` isSubscription | `http.Response` | Validate receipt for android. |
 
 
 ## Data Types
@@ -133,6 +134,21 @@ For help on adding as a dependency, view the [documentation](https://flutter.io/
   }
   ```
 
+#### Receipt validation
+From `0.7.1`, we support receipt validation. For Android, you need separate json file from the service account to get the `access_token` from `google-apis`, therefore it is impossible to implement serverless. You should have your own backend and get `access_token`. With `access_token` you can simply call `validateReceiptAndroid` method we implemented. Further reading is [here](https://stackoverflow.com/questions/35127086/android-inapp-purchase-receipt-validation-google-play?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa).
+Currently, serverless receipt validation is possible using `validateReceiptIos` method. The first parameter, you should pass `transactionReceipt` which returns after `buyProduct`. The second parameter, you should pass whether this is `test` environment. If `true`, it will request to `sandbox` and `false` it will request to `production`.
+
+  ```dart
+  validateReceipt() async {
+    var receiptBody = {
+      'receipt-data': purchased.transactionReceipt,
+      'password': '******'
+    };
+    const result = await validateReceiptIos(receiptBody, false);
+    console.log(result);
+  }
+  ```
+For further information, please refer to [guide](https://developer.apple.com/library/content/releasenotes/General/ValidateAppStoreReceipt/Chapters/ValidateRemotely.html).
 
 ## Example
 Below code is just a `cp` from example project. You can test this in real example project.

lib/flutter_inapp_purchase.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io' show Platform;
+import 'package:http/http.dart' as http;
 
 import 'package:flutter/services.dart';
 
@@ -371,4 +372,71 @@ class FlutterInappPurchase {
     throw PlatformException(
         code: Platform.operatingSystem, message: "platform not supported");
   }
+
+  /// Validate receipt in ios
+  ///
+  /// Example:
+  /// ```
+  /// const receiptBody = {
+  /// 'receipt-data': purchased.transactionReceipt,
+  /// 'password': '******'
+  /// };
+  /// const result = await validateReceiptIos(receiptBody, false);
+  /// console.log(result);
+  /// ```
+  static Future<http.Response> validateReceiptIos({
+    Map<String, String> receiptBody,
+    bool isTest = true,
+  }) async {
+    assert(receiptBody != null);
+    assert(isTest != null);
+
+    final String url = isTest ? 'https://sandbox.itunes.apple.com/verifyReceipt' : 'https://buy.itunes.apple.com/verifyReceipt';
+    return await http.post(
+      url,
+      headers: {
+        'Accept': 'application/json',
+        'Content-Type': 'application/json',
+      },
+      body: json.encode(receiptBody),
+    );
+  }
+
+  /// Validate receipt in android
+  ///
+  /// For Android, you need separate json file from the service account to get the access_token from google-apis, therefore it is impossible to implement serverless. You should have your own backend and get access_token.
+  /// Read: https://stackoverflow.com/questions/35127086/android-inapp-purchase-receipt-validation-google-play?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa
+  ///
+  /// Example:
+  /// ```
+  /// const result = await validateReceiptAndroid(
+  ///   packageName: 'com.dooboolab.iap',
+  ///   productId: 'product_1',
+  ///   productToken: 'some_token_string',
+  ///   accessToken: 'play_console_access_token',
+  ///   isSubscription: false,
+  /// );
+  /// console.log(result);
+  /// ```
+  static Future<http.Response> validateReceiptAndroid({
+    String packageName,
+    String productId,
+    String productToken,
+    String accessToken,
+    bool isSubscription = false,
+  }) async {
+    assert(packageName != null);
+    assert(productId != null);
+    assert(productToken != null);
+    assert(accessToken != null);
+
+    final String type = isSubscription ? 'subscriptions' : 'products';
+    final String url = 'https://www.googleapis.com/androidpublisher/v2/applications/$packageName/purchases/$type/$productId/tokens/$productToken?access_token=$accessToken';
+    return await http.get(
+      url,
+      headers: {
+        'Accept': 'application/json',
+      },
+    );
+  }
 }

pubspec.yaml

@@ -1,14 +1,17 @@
 name: flutter_inapp_purchase
 description: In App Purchase plugin for flutter. This project has been forked by react-native-iap and we are willing to share same experience with that on react-native.
-version: 0.7.0
+version: 0.7.1
 author: dooboolab<dooboolab@gmail.com>
 homepage: https://github.com/dooboolab/flutter_inapp_purchase/blob/master/pubspec.yaml
 environment:
   sdk: '>=1.20.1 <3.0.0'
 dependencies:
+  http: ^0.11.3+16
   flutter:
     sdk: flutter
 
+
+
 # For information on the generic Dart part of this file, see the
 # following page: https://www.dartlang.org/tools/pub/pubspec