Updated on 2026-08-14

app/src/main/java/com/tangem/App.java

@@ -3,14 +3,17 @@ package com.tangem;
 import android.app.Application;
 import android.support.v7.app.AppCompatDelegate;
 
-public class AppController extends Application {
+import com.tangem.di.AppComponent;
+import com.tangem.di.DaggerAppComponent;
+
+public class App extends Application {
 
     /**
      * A singleton instance of the application class for easy access in other places
      */
-    private static AppController sInstance;
+    private static App sInstance;
 
-    public AppController() {
+    public App() {
         super();
     }
 
@@ -18,18 +21,26 @@ public class AppController extends Application {
         AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
     }
 
+    private static AppComponent component;
+
     @Override
     public void onCreate() {
         super.onCreate();
         // initialize the singleton
         sInstance = this;
+
+        component = DaggerAppComponent.create();
     }
 
     /**
      * @return singleton instance
      */
-    public static synchronized AppController getInstance() {
+    public static synchronized App getInstance() {
         return sInstance;
     }
 
+    public static AppComponent getComponent() {
+        return component;
+    }
+
 }

app/src/main/java/com/tangem/data/network/ServerApiHelper.java

@@ -5,6 +5,7 @@ import android.support.annotation.NonNull;
 import android.util.Log;
 
 import com.jakewharton.retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
+import com.tangem.App;
 import com.tangem.data.network.model.CardVerifyAndGetInfo;
 import com.tangem.data.network.model.InfuraBody;
 import com.tangem.data.network.model.InfuraResponse;
@@ -64,12 +65,7 @@ public class ServerApiHelper {
     }
 
     public void estimateFee(int blockCount) {
-        Retrofit retrofit = new Retrofit.Builder()
-                .baseUrl(Server.ApiEstimatefee.URL_ESTIMATEFEE)
-                .addConverterFactory(GsonConverterFactory.create())
-                .build();
-
-        EstimatefeeApi estimatefeeApi = retrofit.create(EstimatefeeApi.class);
+        EstimatefeeApi estimatefeeApi = App.getComponent().getRetrofitEstimatefee().create(EstimatefeeApi.class);
 
         Call<String> call;
         switch (blockCount) {
@@ -136,12 +132,7 @@ public class ServerApiHelper {
     }
 
     public void infura(String method, int id, String wallet, String contract, String tx) {
-        Retrofit retrofit = new Retrofit.Builder()
-                .baseUrl(Server.ApiInfura.URL_INFURA)
-                .addConverterFactory(GsonConverterFactory.create())
-                .build();
-
-        InfuraApi infuraApi = retrofit.create(InfuraApi.class);
+        InfuraApi infuraApi = App.getComponent().getRetrofitInfura().create(InfuraApi.class);
 
         InfuraBody infuraBody;
         switch (method) {

app/src/main/java/com/tangem/di/AppComponent.java

@@ -0,0 +1,18 @@
+package com.tangem.di;
+
+import javax.inject.Named;
+import javax.inject.Singleton;
+
+import dagger.Component;
+import retrofit2.Retrofit;
+
+@Singleton
+@Component(modules = {NetworkModule.class})
+public interface AppComponent {
+
+    @Named(NetworkModule.PROVIDE_RETROFIT_INFURA)
+    Retrofit getRetrofitInfura();
+
+    @Named(NetworkModule.PROVIDE_RETROFIT_ESTIMATEFEE)
+    Retrofit getRetrofitEstimatefee();
+}

app/src/main/java/com/tangem/di/NetworkModule.java

@@ -0,0 +1,39 @@
+package com.tangem.di;
+
+import com.tangem.data.network.Server;
+
+import javax.inject.Named;
+import javax.inject.Singleton;
+
+import dagger.Module;
+import dagger.Provides;
+import retrofit2.Retrofit;
+import retrofit2.converter.gson.GsonConverterFactory;
+
+@Module
+class NetworkModule {
+
+    final static String PROVIDE_RETROFIT_INFURA = "provideRetrofitInfura";
+    final static String PROVIDE_RETROFIT_ESTIMATEFEE = "provideRetrofitEstimatefee";
+
+    @Singleton
+    @Provides
+    @Named(PROVIDE_RETROFIT_INFURA)
+    Retrofit provideRetrofitInfura() {
+        return new Retrofit.Builder()
+                .baseUrl(Server.ApiInfura.URL_INFURA)
+                .addConverterFactory(GsonConverterFactory.create())
+                .build();
+    }
+
+    @Singleton
+    @Provides
+    @Named(PROVIDE_RETROFIT_ESTIMATEFEE)
+    Retrofit provideRetrofitEstimatefee() {
+        return new Retrofit.Builder()
+                .baseUrl(Server.ApiEstimatefee.URL_ESTIMATEFEE)
+                .addConverterFactory(GsonConverterFactory.create())
+                .build();
+    }
+
+}

app/src/main/java/com/tangem/presentation/activity/LoadedWalletActivity.kt

@@ -4,8 +4,10 @@ import android.nfc.NfcAdapter
 import android.nfc.Tag
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
+import com.tangem.App
 import com.tangem.presentation.fragment.LoadedWallet
 import com.tangem.wallet.R
+import retrofit2.Retrofit
 
 class LoadedWalletActivity : AppCompatActivity() {
 
@@ -28,12 +30,4 @@ class LoadedWalletActivity : AppCompatActivity() {
         }
     }
 
-//    override fun onBackPressed() {
-//        val loadedWallet = supportFragmentManager.findFragmentById(R.id.loaded_wallet_fragment) as LoadedWallet
-//        val data = loadedWallet.prepareResultIntent()
-//        data.putExtra(EXTRA_MODIFICATION, "update")
-//        setResult(Activity.RESULT_OK, data)
-//        finish()
-//    }
-
 }