Updated on 2026-08-14

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

@@ -4,6 +4,7 @@ import android.annotation.SuppressLint
 import android.content.Intent
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
+import com.tangem.data.network.ServerApiHelperElectrum
 import com.tangem.wallet.BuildConfig
 import com.tangem.wallet.R
 import kotlinx.android.synthetic.main.activity_logo.*
@@ -17,6 +18,8 @@ class LogoActivity : AppCompatActivity() {
         const val MILLIS_AUTO_HIDE = 1000
     }
 
+    private var serverApiHelperElectrum: ServerApiHelperElectrum = ServerApiHelperElectrum()
+
     private val hideRunnable = Runnable { this.hide() }
 
     override fun onCreate(savedInstanceState: Bundle?) {

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

@@ -53,6 +53,8 @@ class MainActivity : AppCompatActivity(), NfcAdapter.ReaderCallback, CardProtoco
 
         const val EXTRA_LAST_DISCOVERED_TAG = "extra_last_tag"
 
+        fun callingIntent(context: Context) = Intent(context, MainActivity::class.java)
+
         fun commonInit(context: Context) {
             if (PINStorage.needInit())
                 PINStorage.Init(context)

app/src/main/java/com/tangem/presentation/viewmodel/BaseViewModel.kt

@@ -0,0 +1,34 @@
+/**
+
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.tangem.presentation.viewmodel
+
+import android.arch.lifecycle.MutableLiveData
+import android.arch.lifecycle.ViewModel
+import com.dmmatrix.epro.core.exception.Failure
+
+/**
+ * Base ViewModel class with default Failure handling.
+ * @see ViewModel
+ * @see Failure
+ */
+abstract class BaseViewModel : ViewModel() {
+
+    var failure: MutableLiveData<Failure> = MutableLiveData()
+
+    protected fun handleFailure(failure: Failure) {
+        this.failure.value = failure
+    }
+}

app/src/main/java/com/tangem/presentation/viewmodel/LoadedWalletViewModel.kt

@@ -0,0 +1,33 @@
+package com.tangem.presentation.viewmodel
+
+import android.arch.lifecycle.MutableLiveData
+import com.dmmatrix.epro.core.exception.Failure
+
+class LoadedWalletViewModel : BaseViewModel() {
+
+    private val state: MutableLiveData<State> = MutableLiveData()
+
+    fun getState() = state
+
+    enum class State {
+        ServerError,
+        Failed,
+        Success
+    }
+
+    fun connectToken(data: String, data2: String) {
+
+    }
+
+    private fun handleTokensSaveFailure(failure: Failure) {
+        state.value = State.Success
+        handleFailure(failure)
+    }
+
+    private fun handleLoginFailure(failure: Failure) {
+        when (failure) {
+            is Failure.ServerError -> state.value = State.ServerError
+        }
+        handleFailure(failure)
+    }
+}