diff --git a/android/src/main/java/ir/appeto/myketpayment/MyketpaymentPlugin.java b/android/src/main/java/ir/appeto/myketpayment/MyketpaymentPlugin.java
index 8313de0..ea132e9 100644
--- a/android/src/main/java/ir/appeto/myketpayment/MyketpaymentPlugin.java
+++ b/android/src/main/java/ir/appeto/myketpayment/MyketpaymentPlugin.java
@@ -43,6 +43,8 @@ public class MyketpaymentPlugin implements FlutterPlugin, MethodCallHandler, Act
   public String payload;
   public String sku;
   public boolean consume;
+  public String purchasedSku;
+  public boolean isPurchased = false;
 
 
 
@@ -75,6 +77,9 @@ public class MyketpaymentPlugin implements FlutterPlugin, MethodCallHandler, Act
     else if (call.method.equals("buy")) {
       buy(call, result);
     }
+    else if (call.method.equals("check")) {
+      check(call, result);
+    }
     else {
       result.notImplemented();
     }
@@ -82,6 +87,10 @@ public class MyketpaymentPlugin implements FlutterPlugin, MethodCallHandler, Act
 
   public void setup(@NonNull MethodCall call, @NonNull Result result) {
     Log.d(TAG, call.argument("rsa").toString());
+    Log.d(TAG, call.argument("purchasedSku").toString());
+
+    purchasedSku = call.argument("purchasedSku").toString();
+
     // Create the helper, passing it our context and the public key to verify signatures with
     String base64EncodedPublicKey = call.argument("rsa").toString();
     Log.d(TAG, "Creating IAB helper.");
@@ -127,6 +136,10 @@ public class MyketpaymentPlugin implements FlutterPlugin, MethodCallHandler, Act
             mPurchaseFinishedListener, payload);
   }
 
+  public void check(@NonNull MethodCall call, @NonNull Result result) {
+    _result.success(isPurchased);
+  }
+
   // Listener that's called when we finish querying the items and subscriptions we own
   IabHelper.QueryInventoryFinishedListener mGotInventoryListener = new IabHelper.QueryInventoryFinishedListener() {
     @Override
@@ -146,6 +159,14 @@ public class MyketpaymentPlugin implements FlutterPlugin, MethodCallHandler, Act
         return;
       }
       Log.d(TAG, "Query inventory was successful.");
+
+      if(purchasedSku != "") {
+        Purchase premiumPurchase = inventory.getPurchase(purchasedSku);
+        isPurchased = (premiumPurchase != null && verifyDeveloperPayload(premiumPurchase));
+        Log.d(TAG, "User is " + (isPurchased ? "PREMIUM" : "NOT PREMIUM"));
+      }
+
+
       _result.success(true);
 
     }
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 5e09e61..a1c475e 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -69,6 +69,23 @@ class _MyAppState extends State<MyApp> {
                   }
                 },
               ),
+              SizedBox(height: 20,),
+              FlatButton(
+                child: Text("check purchase"),
+                onPressed: () async {
+                  if(!setup) {
+                    setup = await Myketpayment.setup(rsa, purchasedSku: 'flunlimit');
+                  }
+                  print("setup: $setup");
+                  if(setup) {
+                    final result = await Myketpayment.check();
+                    print("IsPurchased: $result");
+                  }
+                  else {
+                    print("can not connect to myket");
+                  }
+                },
+              ),
             ],
           ),
         ),
diff --git a/example/pubspec.lock b/example/pubspec.lock
index a488521..886f381 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
@@ -80,7 +80,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   myketpayment:
     dependency: "direct main"
     description:
@@ -106,7 +106,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
@@ -141,7 +141,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description:
@@ -157,5 +157,5 @@ packages:
     source: hosted
     version: "2.1.0"
 sdks:
-  dart: ">=2.12.0-0.0 <3.0.0"
+  dart: ">=2.12.0 <3.0.0"
   flutter: ">=1.10.0"
diff --git a/lib/myketpayment.dart b/lib/myketpayment.dart
index f0a7743..b2df304 100644
--- a/lib/myketpayment.dart
+++ b/lib/myketpayment.dart
@@ -7,8 +7,8 @@ class Myketpayment {
   static const MethodChannel _channel = const MethodChannel('myketpayment');
 
 
-  static Future<bool> setup(String rsa) async {
-    final bool version = await _channel.invokeMethod('setup', {"rsa": rsa});
+  static Future<bool> setup(String rsa, {String purchasedSku = ''}) async {
+    final bool version = await _channel.invokeMethod('setup', {"rsa": rsa, 'purchasedSku': purchasedSku});
     return version;
   }
 
@@ -17,5 +17,9 @@ class Myketpayment {
     return result;
   }
 
+  static Future<bool> check() async {
+    final bool version = await _channel.invokeMethod('check', {});
+    return version;
+  }
 
 }
diff --git a/pubspec.lock b/pubspec.lock
index 8f4a32f..4fe6b9f 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
@@ -73,7 +73,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   path:
     dependency: transitive
     description:
@@ -92,7 +92,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
@@ -127,7 +127,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description:
@@ -143,5 +143,5 @@ packages:
     source: hosted
     version: "2.1.0"
 sdks:
-  dart: ">=2.12.0-0.0 <3.0.0"
+  dart: ">=2.12.0 <3.0.0"
   flutter: ">=1.10.0"