Updated on 2026-08-14

app/src/main/java/com/tangem/tap/domain/TapErrors.kt

@@ -8,4 +8,5 @@ sealed class TapError(@StringRes val localizedMessage: Int): Throwable() {
     object PayIdCreatingError: TapError(R.string.error_creating_payid)
     object PayIdEmptyField: TapError(R.string.wallet_create_payid_empty)
     object UnknownBlockchain: TapError(R.string.wallet_unknown_blockchain)
+    object NoInternetConnection: TapError(R.string.notification_no_internet)
 }

app/src/main/java/com/tangem/tap/domain/TapWalletManager.kt

@@ -3,6 +3,7 @@ package com.tangem.tap.domain
 import com.tangem.blockchain.common.Wallet
 import com.tangem.blockchain.common.WalletManager
 import com.tangem.commands.Card
+import com.tangem.commands.CardStatus
 import com.tangem.commands.common.network.Result
 import com.tangem.commands.common.network.TangemService
 import com.tangem.common.extensions.toHexString
@@ -73,7 +74,7 @@ class TapWalletManager {
             store.dispatch(GlobalAction.SaveScanNoteResponse(data))
             if (data.walletManager != null) {
                 if (!NetworkConnectivity.getInstance().isOnlineOrConnecting()) {
-                    store.dispatch(WalletAction.LoadData.NoInternetConnection)
+                    store.dispatch(WalletAction.LoadData.Failure(TapError.NoInternetConnection))
                     return@withContext
                 }
                 data.verifyResponse?.artworkInfo?.id?.let {
@@ -82,8 +83,10 @@ class TapWalletManager {
                 store.dispatch(WalletAction.LoadWallet)
                 store.dispatch(WalletAction.LoadFiatRate)
                 store.dispatch(WalletAction.LoadPayId)
-            } else {
+            } else if (data.card.status == CardStatus.Empty){
                 store.dispatch(WalletAction.EmptyWallet)
+            } else {
+                store.dispatch(WalletAction.LoadData.Failure(TapError.UnknownBlockchain))
             }
         }
     }

app/src/main/java/com/tangem/tap/domain/tasks/ScanNoteTask.kt

@@ -6,7 +6,6 @@ import com.tangem.TangemSdkError
 import com.tangem.blockchain.common.WalletManager
 import com.tangem.blockchain.common.WalletManagerFactory
 import com.tangem.commands.Card
-import com.tangem.commands.CardStatus
 import com.tangem.commands.CommandResponse
 import com.tangem.commands.verifycard.VerifyCardCommand
 import com.tangem.commands.verifycard.VerifyCardResponse
@@ -24,12 +23,11 @@ class ScanNoteTask : CardSessionRunnable<ScanNoteResponse> {
     override fun run(session: CardSession, callback: (result: CompletionResult<ScanNoteResponse>) -> Unit) {
         val card = session.environment.card
         card ?: return callback(CompletionResult.Failure(TangemSdkError.CardError()))
-        if (card.status == CardStatus.Empty) {
+        val walletManager = try {
+            WalletManagerFactory.makeWalletManager(card)
+        } catch (exception: Exception) {
             return callback(CompletionResult.Success(ScanNoteResponse(null, card)))
         }
-        val walletManager = WalletManagerFactory.makeWalletManager(card)
-                ?: return callback(CompletionResult.Failure(TangemSdkError.CardError()))
-
         VerifyCardCommand(true).run(session) { result ->
             when (result) {
                 is CompletionResult.Success -> {
@@ -48,10 +46,10 @@ class ScanNoteTask : CardSessionRunnable<ScanNoteResponse> {
 
 fun Card?.toScanNoteCompletionResult(): CompletionResult<ScanNoteResponse> {
     this ?: return CompletionResult.Failure(TangemSdkError.CardError())
-    if (this.status == CardStatus.Empty) {
+    val walletManager = try {
+        WalletManagerFactory.makeWalletManager(this)
+    } catch (exception: Exception) {
         return CompletionResult.Success(ScanNoteResponse(null, this))
     }
-    val walletManager = WalletManagerFactory.makeWalletManager(this)
-            ?: return CompletionResult.Failure(TangemSdkError.CardError())
     return CompletionResult.Success(ScanNoteResponse(walletManager, this))
 }

app/src/main/java/com/tangem/tap/features/wallet/redux/WalletAction.kt

@@ -13,7 +13,7 @@ import java.math.BigDecimal
 sealed class WalletAction : Action {
 
     object LoadData : WalletAction() {
-        object NoInternetConnection : WalletAction()
+        data class Failure(val error: TapError): WalletAction()
     }
 
     object LoadWallet : WalletAction() {

app/src/main/java/com/tangem/tap/features/wallet/redux/WalletReducer.kt

@@ -7,6 +7,7 @@ import com.tangem.tap.common.extensions.toFiatString
 import com.tangem.tap.common.extensions.toFormattedString
 import com.tangem.tap.common.extensions.toQrCode
 import com.tangem.tap.common.redux.AppState
+import com.tangem.tap.domain.TapError
 import com.tangem.tap.features.wallet.models.toPendingTransactions
 import com.tangem.tap.features.wallet.ui.BalanceStatus
 import com.tangem.tap.features.wallet.ui.BalanceWidgetData
@@ -31,22 +32,33 @@ private fun internalReduce(action: Action, state: AppState): WalletState {
                 currencyData = BalanceWidgetData(BalanceStatus.EmptyCard),
                 mainButton = WalletMainButton.CreateWalletButton(true)
         )
-        is WalletAction.LoadData.NoInternetConnection -> {
-            val wallet = state.globalState.scanNoteResponse?.walletManager?.wallet
-            val addressData = if (wallet == null) {
-                null
-            } else {
-                AddressData(wallet.address, wallet.shareUrl, wallet.exploreUrl)
+        is WalletAction.LoadData.Failure -> {
+            when (action.error) {
+                is TapError.NoInternetConnection -> {
+                    val wallet = state.globalState.scanNoteResponse?.walletManager?.wallet
+                    val addressData = if (wallet == null) {
+                        null
+                    } else {
+                        AddressData(wallet.address, wallet.shareUrl, wallet.exploreUrl)
+                    }
+                    newState = WalletState(
+                            state = ProgressState.Error,
+                            error = ErrorType.NoInternetConnection,
+                            addressData = addressData,
+                            currencyData = BalanceWidgetData(
+                                    status = BalanceStatus.Unreachable,
+                                    currency = wallet?.blockchain?.fullName),
+                            mainButton = WalletMainButton.SendButton(false)
+                    )
+                }
+                is TapError.UnknownBlockchain -> {
+                    newState = WalletState(
+                            state = ProgressState.Done,
+                            currencyData = BalanceWidgetData(BalanceStatus.UnknownBlockchain)
+                    )
+                }
             }
-            newState = WalletState(
-                    state = ProgressState.Error,
-                    error = ErrorType.NoInternetConnection,
-                    addressData = addressData,
-                    currencyData = BalanceWidgetData(
-                            status = BalanceStatus.Unreachable,
-                            currency = wallet?.blockchain?.fullName),
-                    mainButton = WalletMainButton.SendButton(false)
-            )
+
         }
         is WalletAction.LoadWallet -> {
             val wallet = state.globalState.scanNoteResponse?.walletManager?.wallet

app/src/main/java/com/tangem/tap/features/wallet/ui/BalanceWidget.kt

@@ -15,7 +15,8 @@ enum class BalanceStatus {
     Unreachable,
     Loading,
     NoAccount,
-    EmptyCard
+    EmptyCard,
+    UnknownBlockchain
 }
 
 data class BalanceWidgetData(
@@ -84,8 +85,9 @@ class BalanceWidget(
                 fragment.tv_currency.text = data.currency
                 fragment.tv_currency_symbol.text = "-"
                 fragment.tv_amount.text = ""
+                fragment.tv_status_error_message.text = data.errorMessage
 
-                showStatus(R.id.tv_status_error)
+                showStatus(R.id.group_error)
             }
             BalanceStatus.EmptyCard -> {
                 fragment.l_balance.hide()
@@ -103,11 +105,18 @@ class BalanceWidget(
                                 data.amountToCreateAccount?.toString(), data.currencySymbol
                         )
             }
+            BalanceStatus.UnknownBlockchain -> {
+                fragment.l_balance.hide()
+                fragment.l_balance_error.show()
+                fragment.tv_error_title.text = fragment.getText(R.string.wallet_unknown_blockchain_title)
+                fragment.tv_error_descriptions.text =
+                        fragment.getString(R.string.wallet_unknown_blockchain)
+            }
         }
     }
 
     private fun showStatus(@IdRes viewRes: Int) {
-        fragment.tv_status_error.show(viewRes == R.id.tv_status_error)
+        fragment.group_error.show(viewRes == R.id.group_error)
         fragment.tv_status_loading.show(viewRes == R.id.tv_status_loading)
         fragment.tv_status_verified.show(viewRes == R.id.tv_status_verified)
     }

app/src/main/res/layout/layout_balance.xml

@@ -53,6 +53,26 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/tv_currency" />
 
+    <TextView
+        android:id="@+id/tv_status_error_message"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:paddingStart="16dp"
+        android:paddingTop="4dp"
+        android:paddingEnd="16dp"
+        android:textColor="@color/darkGray2"
+        android:textSize="12sp"
+        android:visibility="gone"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/tv_status_error" />
+
+    <androidx.constraintlayout.widget.Group
+        android:id="@+id/group_error"
+        android:visibility="gone"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:constraint_referenced_ids="tv_status_error, tv_status_error_message" />
+
     <TextView
         android:id="@+id/tv_status_loading"
         android:layout_width="wrap_content"

app/src/main/res/layout/layout_balance_error.xml

@@ -32,9 +32,11 @@
     <TextView
         android:id="@+id/tv_error_descriptions"
         app:layout_constraintStart_toEndOf="@id/iv_balance_error"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toBottomOf="@id/tv_error_title"
+        app:layout_constraintHorizontal_weight="0"
         tools:text="Load10+ XLM to create account"
-        android:layout_width="wrap_content"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:paddingStart="16dp"
         android:paddingTop="4dp"

app/src/main/res/values/strings.xml

@@ -19,7 +19,8 @@
     <string name="wallet_create_payid">Create PayID</string>
     <string name="wallet_verified_balance">Verified Balance</string>
     <string name="wallet_blockchain_is_unreachable">Blockchain is unreachable</string>
-    <string name="wallet_unknown_blockchain">Uh oh!\nYour Tangem card was made to work with a different application. Please see the name and instructions on your card, and install the correct app.</string>
+    <string name="wallet_unknown_blockchain">Your Tangem card was made to work with a different application. Please see the name and instructions on your card, and install the correct app.</string>
+    <string name="wallet_unknown_blockchain_title">Uh oh!</string>
     <string name="wallet_balance_is_loading">Balance is loading…</string>
     <string name="wallet_account_not_created">Account is not created</string>
     <string name="wallet_empty_card">Empty Card</string>