[#19] Purchase Gems now working :)

Habitica/build.gradle

@@ -88,7 +88,7 @@ dependencies {
     compile 'de.greenrobot:eventbus:2.4.0'
 
     // IAP Handling / Verification
-    compile 'org.solovyev.android:checkout:0.7.4@aar'
+    compile 'org.solovyev.android:checkout:0.7.5@aar'
 
     compile 'com.facebook.android:facebook-android-sdk:4.7.0'
     //Material Dialogs

Habitica/res/layout/fragment_gem_purchase.xml

@@ -3,10 +3,22 @@
     android:orientation="vertical" android:layout_width="match_parent"
     android:layout_height="match_parent">
 
+    <TextView android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+
+        android:layout_marginTop="5dp"
+        android:text="Help support Habitica"
+        android:layout_gravity="center_horizontal">
+
+    </TextView>
+
     <Button
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Buy"
+        android:text="+ 20"
         android:id="@+id/btn.purchase.gems"
-        android:layout_gravity="center_horizontal" />
+        android:layout_gravity="center_horizontal"
+        android:drawableRight="@drawable/ic_header_gem"
+        android:drawablePadding="5dp"
+        android:textColor="@color/white"/>
 </LinearLayout>

Habitica/src/com/habitrpg/android/habitica/APIHelper.java

@@ -19,8 +19,11 @@ import com.habitrpg.android.habitica.callbacks.HabitRPGUserCallback;
 import com.habitrpg.android.habitica.callbacks.TaskDeletionCallback;
 import com.habitrpg.android.habitica.callbacks.TaskScoringCallback;
 import com.magicmicky.habitrpgwrapper.lib.api.ApiService;
+import com.magicmicky.habitrpgwrapper.lib.api.InAppPurchasesApiService;
 import com.magicmicky.habitrpgwrapper.lib.api.Server;
 import com.magicmicky.habitrpgwrapper.lib.api.TypeAdapter.TagsAdapter;
+import com.magicmicky.habitrpgwrapper.lib.models.PurchaseValidationRequest;
+import com.magicmicky.habitrpgwrapper.lib.models.PurchaseValidationResult;
 import com.magicmicky.habitrpgwrapper.lib.models.SkillList;
 import com.magicmicky.habitrpgwrapper.lib.models.TaskDirection;
 import com.magicmicky.habitrpgwrapper.lib.models.UserAuth;
@@ -50,20 +53,21 @@ public class APIHelper implements ErrorHandler, Profiler {
     private static final String TAG = "ApiHelper";
     // I think we don't need the APIHelper anymore we could just use ApiService
     public final ApiService apiService;
+    private final InAppPurchasesApiService inAppPurchasesService;
     private Context mContext;
+    private HostConfig cfg;
 
     //private OnHabitsAPIResult mResultListener;
     //private HostConfig mConfig;
     public APIHelper(Context c, final HostConfig cfg) {
         this.mContext = c;
+        this.cfg = cfg;
 
         RequestInterceptor requestInterceptor = new RequestInterceptor() {
             @Override
             public void intercept(RequestInterceptor.RequestFacade request) {
                 request.addHeader("x-api-key", cfg.getApi());
                 request.addHeader("x-api-user", cfg.getUser());
-
-
             }
         };
 
@@ -104,6 +108,19 @@ public class APIHelper implements ErrorHandler, Profiler {
                 .build();
         this.apiService = adapter.create(ApiService.class);
 
+        server = new Server(cfg.getAddress(), false);
+
+        adapter = new RestAdapter.Builder()
+                .setEndpoint(server.toString())
+                .setErrorHandler(this)
+                .setProfiler(this)
+                .setLogLevel(BuildConfig.DEBUG ? RestAdapter.LogLevel.FULL : RestAdapter.LogLevel.NONE)
+                .setRequestInterceptor(requestInterceptor)
+                .setConverter(new GsonConverter(gson))
+
+                .build();
+
+        this.inAppPurchasesService = adapter.create(InAppPurchasesApiService.class);
     }
 
     private static final TypeAdapter<Boolean> booleanAsIntAdapter = new TypeAdapter<Boolean>() {
@@ -244,4 +261,9 @@ public class APIHelper implements ErrorHandler, Profiler {
 	public void reviveUser(HabitRPGUserCallback cb) {
         apiService.revive(cb);
     }
+
+    public PurchaseValidationResult validatePurchase(PurchaseValidationRequest request)
+    {
+       return inAppPurchasesService.validatePurchase(cfg.getUser(), cfg.getApi(), request);
+    }
 }

Habitica/src/com/habitrpg/android/habitica/HabiticaApplication.java

@@ -6,6 +6,7 @@ import android.database.sqlite.SQLiteDatabase;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
+import com.facebook.FacebookSdk;
 import com.instabug.library.Instabug;
 import com.raizlabs.android.dbflow.config.FlowManager;
 
@@ -15,15 +16,10 @@ import org.solovyev.android.checkout.Checkout;
 import org.solovyev.android.checkout.Inventory;
 import org.solovyev.android.checkout.ProductTypes;
 import org.solovyev.android.checkout.Products;
-import org.solovyev.android.checkout.Purchase;
 import org.solovyev.android.checkout.PurchaseVerifier;
-import org.solovyev.android.checkout.RequestListener;
-import com.facebook.FacebookSdk;
 
 import java.io.File;
-import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.List;
 import java.util.concurrent.Executor;
 
 /**
@@ -33,12 +29,16 @@ public class HabiticaApplication extends Application {
 
     public static HabiticaApplication Instance;
 
+    public static APIHelper ApiHelper;
+
     @Override
     public void onCreate() {
         super.onCreate();
 
         Instance = this;
 
+        billing.connect();
+
         FlowManager.init(this);
 
         FacebookSdk.sdkInitialize(getApplicationContext());
@@ -73,6 +73,7 @@ public class HabiticaApplication extends Application {
 
     // endregion
 
+    // region IAP - Specific
 
     /**
      * For better performance billing class should be used as singleton
@@ -82,7 +83,7 @@ public class HabiticaApplication extends Application {
         @NonNull
         @Override
         public String getPublicKey() {
-            return "sdfsdfdfsd";
+            return "DONT-NEED-IT";
         }
 
         @Nullable
@@ -93,24 +94,7 @@ public class HabiticaApplication extends Application {
 
         @Override
         public PurchaseVerifier getPurchaseVerifier() {
-            return new PurchaseVerifier() {
+            return new HabiticaPurchaseVerifier();
-                @Override
-                public void verify(List<Purchase> purchases, RequestListener<List<Purchase>> requestListener) {
-                    final List<Purchase> verifiedPurchases = new ArrayList<Purchase>(purchases.size());
-                   /* for (Purchase purchase : purchases) {
-                        if (Security.verifyPurchase(publicKey, purchase.data, purchase.signature)) {
-                            verifiedPurchases.add(purchase);
-                        } else {
-                            if (isEmpty(purchase.signature)) {
-                                Billing.error("Cannot verify purchase: " + purchase + ". Signature is empty");
-                            } else {
-                                Billing.error("Cannot verify purchase: " + purchase + ". Wrong signature");
-                            }
-                        }
-                    }*/
-                    //requestListener.onSuccess(verifiedPurchases);
-                }
-            };
         }
 
         @Override
@@ -139,4 +123,5 @@ public class HabiticaApplication extends Application {
         return checkout;
     }
 
+    // endregion
 }

Habitica/src/com/habitrpg/android/habitica/HabiticaPurchaseVerifier.java

@@ -0,0 +1,44 @@
+package com.habitrpg.android.habitica;
+
+import com.magicmicky.habitrpgwrapper.lib.models.PurchaseValidationRequest;
+import com.magicmicky.habitrpgwrapper.lib.models.PurchaseValidationResult;
+import com.magicmicky.habitrpgwrapper.lib.models.Transaction;
+
+import org.solovyev.android.checkout.BasePurchaseVerifier;
+import org.solovyev.android.checkout.Purchase;
+import org.solovyev.android.checkout.RequestListener;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by Negue on 26.11.2015.
+ */
+public class HabiticaPurchaseVerifier extends BasePurchaseVerifier {
+
+    @Override
+    protected void doVerify(final List<Purchase> purchases, final RequestListener<List<Purchase>> requestListener) {
+        final List<Purchase> verifiedPurchases = new ArrayList<Purchase>(purchases.size());
+
+        for(final Purchase purchase : purchases)
+        {
+            PurchaseValidationRequest validationRequest = new PurchaseValidationRequest();
+            validationRequest.transaction = new Transaction();
+            validationRequest.transaction.receipt = purchase.data;
+            validationRequest.transaction.signature = purchase.signature;
+
+            PurchaseValidationResult purchaseValidationResult = HabiticaApplication.ApiHelper.validatePurchase(validationRequest);
+
+            if (purchaseValidationResult.ok) {
+                verifiedPurchases.add(purchase);
+
+                requestListener.onSuccess(verifiedPurchases);
+            }
+            else
+            {
+                requestListener.onError(purchases.indexOf(purchase), new Exception(purchaseValidationResult.data.toString()));
+            }
+
+        }
+    }
+}

Habitica/src/com/habitrpg/android/habitica/LoginActivity.java

@@ -58,6 +58,9 @@ public class LoginActivity extends AppCompatActivity
 	public Boolean isRegistering;
     private Menu menu;
 
+	private String apiAddress = getString(R.string.SP_address_default);
+	//private String apiAddress = "http://192.168.2.155:8080/"; // local testing
+
     private CallbackManager callbackManager;
 
 	protected void onCreate(Bundle savedInstanceState) {
@@ -107,7 +110,7 @@ public class LoginActivity extends AppCompatActivity
 
 		HostConfig hc= PrefsActivity.fromContext(this);
         if(hc ==null) {
-            hc =  new HostConfig(getString(R.string.SP_address_default), "80", "", "");
+            hc =  new HostConfig(apiAddress, "80", "", "");
         }
 		mApiHelper = new APIHelper(this,hc);
 
@@ -165,7 +168,6 @@ public class LoginActivity extends AppCompatActivity
 	public static void expand(final View v) {
 		v.setVisibility(View.VISIBLE);
 	}
- //
 
 	public static void collapse(final View v) {
         v.setVisibility(View.GONE);
@@ -180,7 +182,7 @@ public class LoginActivity extends AppCompatActivity
 		SharedPreferences.Editor editor = prefs.edit();
 		boolean ans = editor.putString(getString(R.string.SP_APIToken), api)
 				.putString(getString(R.string.SP_userID), user)
-                .putString(getString(R.string.SP_address),getString(R.string.SP_address_default))
+                .putString(getString(R.string.SP_address), apiAddress)
 				.commit();
 			if(!ans) {
 				throw new Exception("PB_string_commit");

Habitica/src/com/habitrpg/android/habitica/MainActivity.java

@@ -13,6 +13,7 @@ import android.view.View;
 import com.crashlytics.android.Crashlytics;
 import com.crashlytics.android.core.CrashlyticsCore;
 import com.habitrpg.android.habitica.callbacks.HabitRPGUserCallback;
+import com.habitrpg.android.habitica.events.commands.OpenGemPurchaseFragmentCommand;
 import com.habitrpg.android.habitica.prefs.PrefsActivity;
 import com.habitrpg.android.habitica.ui.AvatarWithBarsViewModel;
 import com.habitrpg.android.habitica.ui.MainDrawerBuilder;
@@ -22,23 +23,20 @@ import com.habitrpg.android.habitica.userpicture.UserPictureRunnable;
 import com.instabug.wrapper.support.activity.InstabugAppCompatActivity;
 import com.magicmicky.habitrpgwrapper.lib.models.ContentResult;
 import com.magicmicky.habitrpgwrapper.lib.models.HabitRPGUser;
-import com.magicmicky.habitrpgwrapper.lib.models.QuestContent;
-import com.magicmicky.habitrpgwrapper.lib.models.tasks.ItemData;
 import com.mikepenz.materialdrawer.AccountHeader;
 import com.mikepenz.materialdrawer.Drawer;
 import com.mikepenz.materialdrawer.model.interfaces.IProfile;
-import com.raizlabs.android.dbflow.runtime.FlowContentObserver;
 import com.raizlabs.android.dbflow.runtime.transaction.BaseTransaction;
 import com.raizlabs.android.dbflow.runtime.transaction.TransactionListener;
 import com.raizlabs.android.dbflow.sql.builder.Condition;
 import com.raizlabs.android.dbflow.sql.language.Select;
-import com.raizlabs.android.dbflow.structure.BaseModel;
-import com.raizlabs.android.dbflow.structure.Model;
 
-import java.util.Collection;
+import org.solovyev.android.checkout.ActivityCheckout;
+import org.solovyev.android.checkout.Checkout;
 
 import butterknife.ButterKnife;
 import butterknife.InjectView;
+import de.greenrobot.event.EventBus;
 import io.fabric.sdk.android.Fabric;
 import retrofit.Callback;
 import retrofit.RetrofitError;
@@ -73,6 +71,9 @@ public class MainActivity extends InstabugAppCompatActivity implements HabitRPGU
 
     APIHelper mAPIHelper;
 
+    // Checkout needs to be in the Activity..
+    public static ActivityCheckout checkout = null;
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -93,7 +94,7 @@ public class MainActivity extends InstabugAppCompatActivity implements HabitRPGU
             finish();
             return;
         }
-        this.mAPIHelper = new APIHelper(this, hostConfig);
+        HabiticaApplication.ApiHelper = this.mAPIHelper = new APIHelper(this, hostConfig);
 
         new Select().from(HabitRPGUser.class).where(Condition.column("id").eq(hostConfig.getUser())).async().querySingle(userTransactionListener);
 
@@ -132,6 +133,18 @@ public class MainActivity extends InstabugAppCompatActivity implements HabitRPGU
 
             }
         });
+
+        // Create Checkout
+
+        checkout = Checkout.forActivity(this, HabiticaApplication.Instance.getCheckout());
+
+        checkout.start();
+
+        EventBus.getDefault().register(this);
+    }
+
+    public void onEvent(OpenGemPurchaseFragmentCommand cmd){
+        drawer.setSelection(MainDrawerBuilder.SIDEBAR_PURCHASE);
     }
 
     @Override
@@ -248,4 +261,19 @@ public class MainActivity extends InstabugAppCompatActivity implements HabitRPGU
             super.onBackPressed();
         }
     }
+
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        checkout.onActivityResult(requestCode, resultCode, data);
+    }
+
+    @Override
+    public void onDestroy() {
+        if(checkout != null)
+            checkout.stop();
+
+        super.onDestroy();
+    }
 }

Habitica/src/com/habitrpg/android/habitica/events/BoughtGemsEvent.java

@@ -0,0 +1,12 @@
+package com.habitrpg.android.habitica.events;
+
+/**
+ * Created by Negue on 29.11.2015.
+ */
+public class BoughtGemsEvent {
+    public int NewGemsToAdd;
+
+    public BoughtGemsEvent(int newGemsToAdd) {
+        NewGemsToAdd = newGemsToAdd;
+    }
+}

Habitica/src/com/habitrpg/android/habitica/events/commands/OpenGemPurchaseFragmentCommand.java

@@ -0,0 +1,7 @@
+package com.habitrpg.android.habitica.events.commands;
+
+/**
+ * Created by Negue on 29.11.2015.
+ */
+public class OpenGemPurchaseFragmentCommand {
+}

Habitica/src/com/habitrpg/android/habitica/ui/AvatarWithBarsViewModel.java

@@ -13,14 +13,18 @@ import android.widget.TextView;
 
 import com.habitrpg.android.habitica.R;
 import com.habitrpg.android.habitica.databinding.ValueBarBinding;
+import com.habitrpg.android.habitica.events.BoughtGemsEvent;
+import com.habitrpg.android.habitica.events.commands.OpenGemPurchaseFragmentCommand;
 import com.habitrpg.android.habitica.userpicture.UserPicture;
 import com.magicmicky.habitrpgwrapper.lib.models.HabitRPGUser;
 import com.magicmicky.habitrpgwrapper.lib.models.Stats;
 
+import de.greenrobot.event.EventBus;
+
 /**
  * Created by Negue on 14.06.2015.
  */
-public class AvatarWithBarsViewModel {
+public class AvatarWithBarsViewModel implements View.OnClickListener {
     private ValueBarBinding hpBar;
     private ValueBarBinding xpBar;
     private ValueBarBinding mpBar;
@@ -32,6 +36,7 @@ public class AvatarWithBarsViewModel {
     private Context context;
 
     private TextView lvlText, goldText, silverText, gemsText;
+    private HabitRPGUser userObject;
 
     public AvatarWithBarsViewModel(Context context, View v) {
         this.context = context;
@@ -58,10 +63,17 @@ public class AvatarWithBarsViewModel {
         setValueBar(hpBar, 50, 50, context.getString(R.string.HP_default), R.color.hpColor, R.drawable.ic_header_heart);
         setValueBar(xpBar, 1, 1, context.getString(R.string.XP_default), R.color.xpColor, R.drawable.ic_header_exp);
         setValueBar(mpBar, 100, 100, context.getString(R.string.MP_default), R.color.mpColor, R.drawable.ic_header_magic);
+
+        EventBus.getDefault().register(this);
+
+        gemsText.setClickable(true);
+        gemsText.setOnClickListener(this);
     }
 
     @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
     public void updateData(HabitRPGUser user) {
+        userObject = user;
+
         Stats stats = user.getStats();
         char classShort;
         String userClass = "";
@@ -138,4 +150,17 @@ public class AvatarWithBarsViewModel {
         valueBar.setBarForegroundColor(color);
         valueBar.icHeader.setImageResource(icon);
     }
+
+    public void onEvent(BoughtGemsEvent gemsEvent){
+        Double gems = new Double(userObject.getBalance() * 4);
+        gems += gemsEvent.NewGemsToAdd;
+        gemsText.setText(gems.intValue() + "");
+    }
+
+    @Override
+    public void onClick(View view) {
+        // Gems Clicked
+
+        EventBus.getDefault().post(new OpenGemPurchaseFragmentCommand());
+    }
 }

Habitica/src/com/habitrpg/android/habitica/ui/MainDrawerBuilder.java

@@ -33,13 +33,13 @@ import com.mikepenz.materialdrawer.model.interfaces.IProfile;
 public class MainDrawerBuilder {
 
     // Change the identificationIDs to the position IDs so that its easier to set the selected entry
-    static final int SIDEBAR_TASKS = 0;
+    public static final int SIDEBAR_TASKS = 0;
-    static final int SIDEBAR_SKILLS = 1;
+    public static final int SIDEBAR_SKILLS = 1;
-    static final int SIDEBAR_TAVERN = 3;
+    public static final int SIDEBAR_TAVERN = 3;
-    static final int SIDEBAR_PARTY = 4;
+    public static final int SIDEBAR_PARTY = 4;
-    static final int SIDEBAR_PURCHASE = 5;
+    public static final int SIDEBAR_PURCHASE = 5;
-    static final int SIDEBAR_SETTINGS = 7;
+    public static final int SIDEBAR_SETTINGS = 7;
-    static final int SIDEBAR_ABOUT = 8;
+    public static final int SIDEBAR_ABOUT = 8;
 
 
 

Habitica/src/com/habitrpg/android/habitica/ui/fragments/GemsPurchaseFragment.java

@@ -9,30 +9,36 @@ import android.view.ViewGroup;
 import android.widget.Button;
 
 import com.habitrpg.android.habitica.HabiticaApplication;
+import com.habitrpg.android.habitica.MainActivity;
 import com.habitrpg.android.habitica.R;
+import com.habitrpg.android.habitica.events.BoughtGemsEvent;
+import com.habitrpg.android.habitica.ui.helpers.ViewHelper;
 
 import org.solovyev.android.checkout.ActivityCheckout;
 import org.solovyev.android.checkout.BillingRequests;
 import org.solovyev.android.checkout.Checkout;
 import org.solovyev.android.checkout.ProductTypes;
 import org.solovyev.android.checkout.Purchase;
+import org.solovyev.android.checkout.Purchases;
 import org.solovyev.android.checkout.RequestListener;
 
 import butterknife.ButterKnife;
 import butterknife.InjectView;
+import butterknife.OnClick;
+import de.greenrobot.event.EventBus;
+import io.fabric.sdk.android.Fabric;
 
 /**
  * Created by Negue on 24.11.2015.
  */
 public class GemsPurchaseFragment extends BaseFragment {
 
+    private BillingRequests billingRequests;
+
     @InjectView(R.id.btn_purchase_gems)
     Button btnPurchaseGems;
 
 
-    private ActivityCheckout checkout = null;
-
-
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
@@ -43,29 +49,44 @@ public class GemsPurchaseFragment extends BaseFragment {
 
         ButterKnife.inject(this, v);
 
-        checkout = Checkout.forActivity(this.activity, HabiticaApplication.Instance.getCheckout());
+        btnPurchaseGems.setEnabled(false);
+        ViewHelper.SetBackgroundTint(btnPurchaseGems, container.getResources().getColor(R.color.brand));
 
-        checkout.start();
+        MainActivity.checkout.destroyPurchaseFlow();
-        // you only need this if this activity starts purchase process
+
-        checkout.createPurchaseFlow(new RequestListener<Purchase>() {
+        MainActivity.checkout.createPurchaseFlow(new RequestListener<Purchase>() {
             @Override
             public void onSuccess(Purchase purchase) {
+                if(purchase.sku.equals(HabiticaApplication.Purchase20Gems)){
+                    billingRequests.consume(purchase.token, new RequestListener<Object>() {
+                        @Override
+                        public void onSuccess(Object o) {
+                            EventBus.getDefault().post(new BoughtGemsEvent(20));
+                        }
 
+                        @Override
+                        public void onError(int i, Exception e) {
+                            Fabric.getLogger().e("Purchase", "Consume", e);
+                        }
+                    });
+                }
             }
 
             @Override
             public void onError(int i, Exception e) {
-
+                Fabric.getLogger().e("Purchase", "Error", e);
             }
         });
 
 
-
+        MainActivity.checkout.whenReady(new Checkout.Listener() {
-
-        checkout.whenReady(new Checkout.Listener() {
             @Override
-            public void onReady(BillingRequests billingRequests) {
+            public void onReady(final BillingRequests billingRequests) {
-                billingRequests.purchase(ProductTypes.IN_APP, HabiticaApplication.Purchase20Gems, null, checkout.getPurchaseFlow());
+                GemsPurchaseFragment.this.billingRequests = billingRequests;
+
+                btnPurchaseGems.setEnabled(true);
+
+                checkIfPendingPurchases();
             }
 
             @Override
@@ -77,16 +98,55 @@ public class GemsPurchaseFragment extends BaseFragment {
         return v;
     }
 
+    private void checkIfPendingPurchases(){
+        billingRequests.getAllPurchases(ProductTypes.IN_APP, new RequestListener<Purchases>() {
+            @Override
+            public void onSuccess(Purchases purchases) {
+                for(Purchase purchase : purchases.list){
+                    if(purchase.sku.equals(HabiticaApplication.Purchase20Gems)) {
+                        billingRequests.consume(purchase.token, new RequestListener<Object>() {
+                            @Override
+                            public void onSuccess(Object o) {
+                                EventBus.getDefault().post(new BoughtGemsEvent(20));
+                            }
 
-    @Override
+                            @Override
-    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+                            public void onError(int i, Exception e) {
-        super.onActivityResult(requestCode, resultCode, data);
+                                Fabric.getLogger().e("Purchase", "Consume", e);
-        checkout.onActivityResult(requestCode, resultCode, data);
+                            }
+                        });
+                    }
+                }
+            }
+
+            @Override
+            public void onError(int i, Exception e) {
+                Fabric.getLogger().e("Purchase","getAllPurchases", e);
+            }
+        });
     }
 
-    @Override
+    @OnClick(R.id.btn_purchase_gems)
-    public void onDestroy() {
+    public void doPurchaseGems(Button button) {
-        checkout.stop();
+        // check if the user already bought and if it hasn't validated yet
-        super.onDestroy();
+        billingRequests.isPurchased(ProductTypes.IN_APP, HabiticaApplication.Purchase20Gems, new RequestListener<Boolean>() {
+            @Override
+            public void onSuccess(Boolean aBoolean) {
+                if (!aBoolean) {
+                    // no current product exist
+                    billingRequests.purchase(ProductTypes.IN_APP, HabiticaApplication.Purchase20Gems, null, MainActivity.checkout.getPurchaseFlow());
+                }
+                else{
+                    checkIfPendingPurchases();
+                }
+            }
+
+            @Override
+            public void onError(int i, Exception e) {
+                Fabric.getLogger().e("Purchase", "Error", e);
+            }
+        });
+
     }
+
 }

Habitica/src/com/magicmicky/habitrpgwrapper/lib/api/InAppPurchasesApiService.java

@@ -0,0 +1,17 @@
+package com.magicmicky.habitrpgwrapper.lib.api;
+
+import com.magicmicky.habitrpgwrapper.lib.models.PurchaseValidationRequest;
+import com.magicmicky.habitrpgwrapper.lib.models.PurchaseValidationResult;
+
+import retrofit.Callback;
+import retrofit.http.Body;
+import retrofit.http.POST;
+import retrofit.http.Query;
+
+/**
+ * Created by Negue on 27.11.2015.
+ */
+public interface InAppPurchasesApiService {
+    @POST("/iap/android/verify")
+    PurchaseValidationResult validatePurchase(@Query("_id") String id, @Query("apiToken") String apiToken, @Body PurchaseValidationRequest request);
+}

Habitica/src/com/magicmicky/habitrpgwrapper/lib/api/Server.java

@@ -4,19 +4,29 @@ package com.magicmicky.habitrpgwrapper.lib.api;
  * Created by MagicMicky on 15/06/2014.
  */
 public class Server {
-    public final static Server NORMAL = new Server("https://habitrpg.com");
-    public final static Server BETA = new Server("https://beta.habitrpg.com");
-
     private String addr;
 
-    public Server(String addr) {
+    public Server(String addr)
-        if(addr.endsWith("/api/v2") || addr.endsWith("/api/v2/"))
+    {
-            this.addr=addr;
+        this(addr, true);
-        else if(addr.endsWith("/"))
-            this.addr=addr + "api/v2";
-        else
-            this.addr = addr + "/api/v2";
     }
+
+    public Server(String addr, boolean attachPrefix)
+    {
+        if(attachPrefix){
+            if(addr.endsWith("/api/v2") || addr.endsWith("/api/v2/"))
+                this.addr=addr;
+            else if(addr.endsWith("/"))
+                this.addr=addr + "api/v2";
+            else
+                this.addr = addr + "/api/v2";
+        }
+        else
+        {
+            this.addr = addr;
+        }
+    }
+
     public Server(Server s) {
         this.addr = s.toString();
     }

Habitica/src/com/magicmicky/habitrpgwrapper/lib/models/PurchaseValidationRequest.java

@@ -0,0 +1,9 @@
+package com.magicmicky.habitrpgwrapper.lib.models;
+
+/**
+ * Created by Negue on 26.11.2015.
+ */
+public class PurchaseValidationRequest {
+    public Transaction transaction;
+}
+

Habitica/src/com/magicmicky/habitrpgwrapper/lib/models/PurchaseValidationResult.java

@@ -0,0 +1,6 @@
+package com.magicmicky.habitrpgwrapper.lib.models;
+
+public class PurchaseValidationResult{
+    public boolean ok;
+    public Object data;
+}

Habitica/src/com/magicmicky/habitrpgwrapper/lib/models/Transaction.java

@@ -0,0 +1,8 @@
+package com.magicmicky.habitrpgwrapper.lib.models;
+
+public class Transaction
+{
+    public String receipt;
+
+    public String signature;
+}