Updated on 2026-08-14

app/src/main/java/com/tangem/tap/ApplicationEntryPoint.kt

@@ -15,15 +15,17 @@ import com.tangem.domain.balancehiding.repositories.BalanceHidingRepository
 import com.tangem.domain.card.ScanCardProcessor
 import com.tangem.domain.card.repository.CardRepository
 import com.tangem.domain.feedback.FeedbackManagerFeatureToggles
+import com.tangem.domain.feedback.GetFeedbackEmailUseCase
+import com.tangem.domain.feedback.SaveBlockchainErrorUseCase
 import com.tangem.domain.onboarding.SaveTwinsOnboardingShownUseCase
 import com.tangem.domain.onboarding.WasTwinsOnboardingShownUseCase
 import com.tangem.domain.settings.repositories.SettingsRepository
 import com.tangem.domain.tokens.repository.CurrenciesRepository
 import com.tangem.domain.tokens.repository.NetworksRepository
-import com.tangem.domain.wallets.usecase.GenerateWalletNameUseCase
 import com.tangem.domain.walletmanager.WalletManagersFacade
 import com.tangem.domain.wallets.legacy.UserWalletsListManager
 import com.tangem.domain.wallets.repository.WalletsRepository
+import com.tangem.domain.wallets.usecase.GenerateWalletNameUseCase
 import com.tangem.features.managetokens.featuretoggles.ManageTokensFeatureToggles
 import com.tangem.features.send.api.featuretoggles.SendFeatureToggles
 import com.tangem.tap.domain.walletconnect2.domain.WalletConnectSessionsRepository
@@ -98,4 +100,8 @@ interface ApplicationEntryPoint {
     fun getSettingsRepository(): SettingsRepository
 
     fun getBlockchainSDKFactory(): BlockchainSDKFactory
+
+    fun getGetFeedbackEmailUseCase(): GetFeedbackEmailUseCase
+
+    fun getSaveBlockchainErrorUseCase(): SaveBlockchainErrorUseCase
 }

app/src/main/java/com/tangem/tap/MainActivity.kt

@@ -30,6 +30,7 @@ import com.tangem.core.analytics.api.AnalyticsEventHandler
 import com.tangem.core.deeplink.DeepLinksRegistry
 import com.tangem.core.navigation.AppScreen
 import com.tangem.core.navigation.NavigationAction
+import com.tangem.core.navigation.email.EmailSender
 import com.tangem.core.ui.event.StateEvent
 import com.tangem.core.ui.extensions.TextReference
 import com.tangem.core.ui.extensions.resolveReference
@@ -151,6 +152,9 @@ class MainActivity : AppCompatActivity(), SnackbarHandler, ActivityResultCallbac
     @Inject
     lateinit var userWalletsListManager: UserWalletsListManager
 
+    @Inject
+    lateinit var emailSender: EmailSender
+
     internal val viewModel: MainViewModel by viewModels()
 
     private lateinit var appThemeModeFlow: SharedFlow<AppThemeMode?>
@@ -234,6 +238,7 @@ class MainActivity : AppCompatActivity(), SnackbarHandler, ActivityResultCallbac
                 cardSdkConfigRepository = cardSdkConfigRepository,
                 sendRouter = sendRouter,
                 qrScanningRouter = qrScanningRouter,
+                emailSender = emailSender,
             ),
         )
     }

app/src/main/java/com/tangem/tap/TangemApplication.kt

@@ -32,15 +32,17 @@ import com.tangem.domain.card.ScanCardProcessor
 import com.tangem.domain.card.repository.CardRepository
 import com.tangem.domain.common.LogConfig
 import com.tangem.domain.feedback.FeedbackManagerFeatureToggles
+import com.tangem.domain.feedback.GetFeedbackEmailUseCase
+import com.tangem.domain.feedback.SaveBlockchainErrorUseCase
 import com.tangem.domain.onboarding.SaveTwinsOnboardingShownUseCase
 import com.tangem.domain.onboarding.WasTwinsOnboardingShownUseCase
 import com.tangem.domain.settings.repositories.SettingsRepository
 import com.tangem.domain.tokens.repository.CurrenciesRepository
 import com.tangem.domain.tokens.repository.NetworksRepository
-import com.tangem.domain.wallets.usecase.GenerateWalletNameUseCase
 import com.tangem.domain.walletmanager.WalletManagersFacade
 import com.tangem.domain.wallets.legacy.UserWalletsListManager
 import com.tangem.domain.wallets.repository.WalletsRepository
+import com.tangem.domain.wallets.usecase.GenerateWalletNameUseCase
 import com.tangem.features.managetokens.featuretoggles.ManageTokensFeatureToggles
 import com.tangem.features.send.api.featuretoggles.SendFeatureToggles
 import com.tangem.tap.common.analytics.AnalyticsFactory
@@ -78,6 +80,7 @@ internal lateinit var derivationsFinder: DerivationsFinder
 
 abstract class TangemApplication : Application(), ImageLoaderFactory {
 
+    // region DI
     private val entryPoint: ApplicationEntryPoint
         get() = EntryPoints.get(this, ApplicationEntryPoint::class.java)
 
@@ -171,6 +174,13 @@ abstract class TangemApplication : Application(), ImageLoaderFactory {
     private val blockchainSDKFactory: BlockchainSDKFactory
         get() = entryPoint.getBlockchainSDKFactory()
 
+    private val getFeedbackEmailUseCase: GetFeedbackEmailUseCase
+        get() = entryPoint.getGetFeedbackEmailUseCase()
+
+    private val saveBlockchainErrorUseCase: SaveBlockchainErrorUseCase
+        get() = entryPoint.getSaveBlockchainErrorUseCase()
+    // endregion
+
     override fun onCreate() {
         super.onCreate()
 
@@ -253,6 +263,7 @@ abstract class TangemApplication : Application(), ImageLoaderFactory {
                     tangemSdkLogger = tangemSdkLogger,
                     settingsRepository = settingsRepository,
                     blockchainSDKFactory = blockchainSDKFactory,
+                    saveBlockchainErrorUseCase = saveBlockchainErrorUseCase,
                 ),
             ),
         )
@@ -344,6 +355,8 @@ abstract class TangemApplication : Application(), ImageLoaderFactory {
             infoHolder = additionalFeedbackInfo,
             logCollector = tangemLogCollector,
             chatManager = ChatManager(foregroundActivityObserver),
+            feedbackManagerFeatureToggles = feedbackManagerFeatureToggles,
+            getFeedbackEmailUseCase = getFeedbackEmailUseCase,
         )
         store.dispatch(GlobalAction.SetFeedbackManager(feedbackManager))
     }

app/src/main/java/com/tangem/tap/common/feedback/FeedbackManager.kt

@@ -3,6 +3,8 @@ package com.tangem.tap.common.feedback
 import android.content.Context
 import com.tangem.datasource.config.models.ChatConfig
 import com.tangem.domain.common.TapWorkarounds
+import com.tangem.domain.feedback.FeedbackManagerFeatureToggles
+import com.tangem.domain.feedback.GetFeedbackEmailUseCase
 import com.tangem.tap.common.chat.ChatManager
 import com.tangem.tap.common.extensions.sendEmail
 import com.tangem.tap.common.log.TangemLogCollector
@@ -20,6 +22,8 @@ class FeedbackManager(
     val infoHolder: AdditionalFeedbackInfo,
     private val logCollector: TangemLogCollector,
     private val chatManager: ChatManager,
+    @Suppress("UnusedPrivateMember") private val feedbackManagerFeatureToggles: FeedbackManagerFeatureToggles,
+    @Suppress("UnusedPrivateMember") private val getFeedbackEmailUseCase: GetFeedbackEmailUseCase,
 ) {
 
     private var sessionFeedbackFile: File? = null

app/src/main/java/com/tangem/tap/di/domain/FeedbackDomainModule.kt

@@ -1,7 +1,8 @@
 package com.tangem.tap.di.domain
 
 import android.content.Context
-import com.tangem.domain.feedback.GetSupportFeedbackEmailUseCase
+import com.tangem.domain.feedback.GetFeedbackEmailUseCase
+import com.tangem.domain.feedback.SaveBlockchainErrorUseCase
 import com.tangem.domain.feedback.repository.FeedbackRepository
 import dagger.Module
 import dagger.Provides
@@ -16,10 +17,16 @@ internal object FeedbackDomainModule {
 
     @Provides
     @Singleton
-    fun provideGetFeedbackToSupportUseCase(
+    fun provideGetFeedbackEmailUseCase(
         feedbackRepository: FeedbackRepository,
         @ApplicationContext context: Context,
-    ): GetSupportFeedbackEmailUseCase {
-        return GetSupportFeedbackEmailUseCase(feedbackRepository = feedbackRepository, resources = context.resources)
+    ): GetFeedbackEmailUseCase {
+        return GetFeedbackEmailUseCase(feedbackRepository = feedbackRepository, resources = context.resources)
+    }
+
+    @Provides
+    @Singleton
+    fun provideSaveBlockchainErrorUseCase(feedbackRepository: FeedbackRepository): SaveBlockchainErrorUseCase {
+        return SaveBlockchainErrorUseCase(feedbackRepository = feedbackRepository)
     }
 }

app/src/main/java/com/tangem/tap/features/details/ui/details/DetailsFragment.kt

@@ -5,11 +5,8 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import com.tangem.core.analytics.Analytics
 import com.tangem.core.navigation.NavigationAction
-import com.tangem.core.navigation.email.EmailSender
 import com.tangem.core.ui.UiDependencies
 import com.tangem.core.ui.screen.ComposeFragment
-import com.tangem.domain.feedback.FeedbackManagerFeatureToggles
-import com.tangem.domain.feedback.GetSupportFeedbackEmailUseCase
 import com.tangem.domain.wallets.legacy.UserWalletsListManager
 import com.tangem.domain.wallets.repository.WalletsRepository
 import com.tangem.tap.common.analytics.events.Settings
@@ -28,15 +25,6 @@ internal class DetailsFragment : ComposeFragment(), StoreSubscriber<DetailsState
     @Inject
     lateinit var walletsRepository: WalletsRepository
 
-    @Inject
-    lateinit var feedbackManagerFeatureToggles: FeedbackManagerFeatureToggles
-
-    @Inject
-    lateinit var getSupportFeedbackEmailUseCase: GetSupportFeedbackEmailUseCase
-
-    @Inject
-    lateinit var emailSender: EmailSender
-
     @Inject
     lateinit var userWalletsListManager: UserWalletsListManager
 
@@ -47,9 +35,6 @@ internal class DetailsFragment : ComposeFragment(), StoreSubscriber<DetailsState
         detailsViewModel = DetailsViewModel(
             store = store,
             walletsRepository = walletsRepository,
-            feedbackManagerFeatureToggles = feedbackManagerFeatureToggles,
-            getSupportFeedbackEmailUseCase = getSupportFeedbackEmailUseCase,
-            emailSender = emailSender,
             userWalletsListManager = userWalletsListManager,
         )
         Analytics.send(Settings.ScreenOpened())

app/src/main/java/com/tangem/tap/features/details/ui/details/DetailsViewModel.kt

@@ -8,14 +8,11 @@ import com.tangem.core.analytics.models.AnalyticsParam
 import com.tangem.core.analytics.models.Basic
 import com.tangem.core.navigation.AppScreen
 import com.tangem.core.navigation.NavigationAction
-import com.tangem.core.navigation.email.EmailSender
 import com.tangem.core.ui.event.StateEvent
 import com.tangem.core.ui.event.consumedEvent
 import com.tangem.core.ui.event.triggeredEvent
 import com.tangem.core.ui.extensions.TextReference
 import com.tangem.domain.common.util.cardTypesResolver
-import com.tangem.domain.feedback.FeedbackManagerFeatureToggles
-import com.tangem.domain.feedback.GetSupportFeedbackEmailUseCase
 import com.tangem.domain.wallets.legacy.UserWalletsListManager
 import com.tangem.domain.wallets.repository.WalletsRepository
 import com.tangem.tap.common.analytics.events.Settings
@@ -30,7 +27,6 @@ import com.tangem.tap.features.details.redux.DetailsState
 import com.tangem.tap.features.disclaimer.redux.DisclaimerAction
 import com.tangem.tap.features.home.LocaleRegionProvider
 import com.tangem.tap.features.home.RUSSIA_COUNTRY_CODE
-import com.tangem.tap.mainScope
 import com.tangem.tap.scope
 import com.tangem.wallet.BuildConfig
 import kotlinx.collections.immutable.ImmutableList
@@ -41,7 +37,6 @@ import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
-import kotlinx.coroutines.launch
 import org.rekotlin.Store
 import timber.log.Timber
 
@@ -49,9 +44,6 @@ import timber.log.Timber
 internal class DetailsViewModel(
     private val store: Store<AppState>,
     private val walletsRepository: WalletsRepository,
-    private val feedbackManagerFeatureToggles: FeedbackManagerFeatureToggles,
-    private val getSupportFeedbackEmailUseCase: GetSupportFeedbackEmailUseCase,
-    private val emailSender: EmailSender,
     private val userWalletsListManager: UserWalletsListManager,
 ) {
 
@@ -149,21 +141,7 @@ internal class DetailsViewModel(
 
     private fun sendFeedback() {
         Analytics.send(Basic.ButtonSupport(AnalyticsParam.ScreensSources.Settings))
-        if (feedbackManagerFeatureToggles.isLocalLogsEnabled) {
-            mainScope.launch {
-                val email = getSupportFeedbackEmailUseCase()
-                emailSender.send(
-                    email = EmailSender.Email(
-                        address = email.address,
-                        subject = email.subject,
-                        message = email.message,
-                        attachment = email.file,
-                    ),
-                )
-            }
-        } else {
-            store.dispatchOnMain(GlobalAction.SendEmail(FeedbackEmail()))
-        }
+        store.dispatchOnMain(GlobalAction.SendEmail(FeedbackEmail()))
     }
 
     private fun navigateToAppSettings() {

app/src/main/java/com/tangem/tap/proxy/redux/DaggerGraphAction.kt

@@ -1,8 +1,9 @@
 package com.tangem.tap.proxy.redux
 
-import com.tangem.feature.qrscanning.QrScanningRouter
+import com.tangem.core.navigation.email.EmailSender
 import com.tangem.domain.card.ScanCardUseCase
 import com.tangem.domain.card.repository.CardSdkConfigRepository
+import com.tangem.feature.qrscanning.QrScanningRouter
 import com.tangem.features.managetokens.navigation.ManageTokensUi
 import com.tangem.features.send.api.navigation.SendRouter
 import com.tangem.features.tester.api.TesterRouter
@@ -23,5 +24,6 @@ sealed interface DaggerGraphAction : Action {
         val cardSdkConfigRepository: CardSdkConfigRepository,
         val sendRouter: SendRouter,
         val qrScanningRouter: QrScanningRouter,
+        val emailSender: EmailSender,
     ) : DaggerGraphAction
 }

app/src/main/java/com/tangem/tap/proxy/redux/DaggerGraphReducer.kt

@@ -22,6 +22,7 @@ object DaggerGraphReducer {
                 cardSdkConfigRepository = action.cardSdkConfigRepository,
                 sendRouter = action.sendRouter,
                 qrScanningRouter = action.qrScanningRouter,
+                emailSender = action.emailSender,
             )
         }
     }

app/src/main/java/com/tangem/tap/proxy/redux/DaggerGraphState.kt

@@ -2,6 +2,7 @@ package com.tangem.tap.proxy.redux
 
 import com.tangem.TangemSdkLogger
 import com.tangem.blockchainsdk.BlockchainSDKFactory
+import com.tangem.core.navigation.email.EmailSender
 import com.tangem.datasource.connection.NetworkConnectionManager
 import com.tangem.domain.appcurrency.repository.AppCurrencyRepository
 import com.tangem.domain.apptheme.repository.AppThemeModeRepository
@@ -11,15 +12,16 @@ import com.tangem.domain.card.ScanCardUseCase
 import com.tangem.domain.card.repository.CardRepository
 import com.tangem.domain.card.repository.CardSdkConfigRepository
 import com.tangem.domain.feedback.FeedbackManagerFeatureToggles
+import com.tangem.domain.feedback.SaveBlockchainErrorUseCase
 import com.tangem.domain.onboarding.SaveTwinsOnboardingShownUseCase
 import com.tangem.domain.onboarding.WasTwinsOnboardingShownUseCase
 import com.tangem.domain.settings.repositories.SettingsRepository
 import com.tangem.domain.tokens.repository.CurrenciesRepository
 import com.tangem.domain.tokens.repository.NetworksRepository
-import com.tangem.domain.wallets.usecase.GenerateWalletNameUseCase
 import com.tangem.domain.walletmanager.WalletManagersFacade
 import com.tangem.domain.wallets.legacy.UserWalletsListManager
 import com.tangem.domain.wallets.repository.WalletsRepository
+import com.tangem.domain.wallets.usecase.GenerateWalletNameUseCase
 import com.tangem.feature.qrscanning.QrScanningRouter
 import com.tangem.features.managetokens.featuretoggles.ManageTokensFeatureToggles
 import com.tangem.features.managetokens.navigation.ManageTokensUi
@@ -69,4 +71,6 @@ data class DaggerGraphState(
     val tangemSdkLogger: TangemSdkLogger? = null,
     val settingsRepository: SettingsRepository? = null,
     val blockchainSDKFactory: BlockchainSDKFactory? = null,
+    val emailSender: EmailSender? = null,
+    val saveBlockchainErrorUseCase: SaveBlockchainErrorUseCase? = null,
 ) : StateType

domain/feedback/src/main/java/com/tangem/domain/feedback/GetFeedbackEmailUseCase.kt

@@ -0,0 +1,67 @@
+package com.tangem.domain.feedback
+
+import android.content.res.Resources
+import com.tangem.domain.feedback.models.CardInfo
+import com.tangem.domain.feedback.models.FeedbackEmail
+import com.tangem.domain.feedback.models.FeedbackEmailType
+import com.tangem.domain.feedback.repository.FeedbackRepository
+import com.tangem.domain.feedback.utils.*
+
+/**
+ * Get email with feedback for support
+ *
+ * @property feedbackRepository feedback repository
+ * @property resources          resources for getting strings
+ *
+[REDACTED_AUTHOR]
+ */
+class GetFeedbackEmailUseCase(
+    private val feedbackRepository: FeedbackRepository,
+    private val resources: Resources,
+) {
+
+    private val emailSubjectResolver = EmailSubjectResolver(resources)
+    private val emailMessageTitleResolver = EmailMessageTitleResolver(resources)
+    private val emailMessageBodyResolver = EmailMessageBodyResolver(feedbackRepository)
+
+    suspend operator fun invoke(type: FeedbackEmailType): FeedbackEmail {
+        val cardInfo = feedbackRepository.getCardInfo()
+
+        val formattedLogs = AppLogsFormatter().format(appLogs = feedbackRepository.getAppLogs())
+
+        return FeedbackEmail(
+            address = getAddress(cardInfo),
+            subject = emailSubjectResolver.resolve(type, cardInfo),
+            message = createMessage(type, cardInfo),
+            file = feedbackRepository.createLogFile(logs = formattedLogs),
+        )
+    }
+
+    private fun getAddress(cardInfo: CardInfo): String {
+        return if (cardInfo.isStart2Coin) START2COIN_SUPPORT_EMAIL else TANGEM_SUPPORT_EMAIL
+    }
+
+    private suspend fun createMessage(type: FeedbackEmailType, cardInfo: CardInfo): String {
+        return StringBuilder().apply {
+            val title = emailMessageTitleResolver.resolve(type)
+            append(title)
+
+            skipLine()
+
+            appendDisclaimerIfNeeded(type)
+
+            skipLine()
+
+            val body = emailMessageBodyResolver.resolve(type, cardInfo)
+            append(body)
+        }.toString()
+    }
+
+    private fun StringBuilder.appendDisclaimerIfNeeded(type: FeedbackEmailType): StringBuilder {
+        return if (type is FeedbackEmailType.ScanningProblem) {
+            this
+        } else {
+            append(resources.getString(R.string.feedback_data_collection_message))
+        }
+    }
+}

domain/feedback/src/main/java/com/tangem/domain/feedback/GetSupportFeedbackEmailUseCase.kt

@@ -1,113 +0,0 @@
-package com.tangem.domain.feedback
-
-import android.content.res.Resources
-import com.tangem.domain.feedback.models.CardInfo
-import com.tangem.domain.feedback.models.SupportFeedbackEmail
-import com.tangem.domain.feedback.repository.FeedbackRepository
-import com.tangem.domain.feedback.utils.skipLine
-import org.joda.time.DateTime
-import org.joda.time.format.DateTimeFormatterBuilder
-import java.util.Locale
-
-/**
- * Get email with feedback for support
- *
- * @property feedbackRepository feedback repository
- * @property resources          resources for getting strings
- *
-[REDACTED_AUTHOR]
- */
-class GetSupportFeedbackEmailUseCase(
-    private val feedbackRepository: FeedbackRepository,
-    private val resources: Resources,
-) {
-
-    // 00.00 00:00:00.000
-    private val dateFormatter = DateTimeFormatterBuilder()
-        .appendDayOfMonth(2)
-        .appendLiteral('.')
-        .appendMonthOfYear(2)
-        .appendLiteral(' ')
-        .appendHourOfDay(2)
-        .appendLiteral(':')
-        .appendMinuteOfHour(2)
-        .appendLiteral(':')
-        .appendSecondOfMinute(2)
-        .appendLiteral('.')
-        .appendMillisOfSecond(3)
-        .toFormatter()
-        .withLocale(Locale.getDefault())
-
-    suspend operator fun invoke(): SupportFeedbackEmail {
-        val cardInfo = feedbackRepository.getCardInfo()
-
-        return SupportFeedbackEmail(
-            address = getEmail(isStart2Coin = cardInfo.isStart2Coin),
-            subject = getSubject(isStart2Coin = cardInfo.isStart2Coin),
-            message = createMessage(cardInfo),
-            file = feedbackRepository.createLogFile(logs = getLogs()),
-        )
-    }
-
-    private fun getEmail(isStart2Coin: Boolean): String {
-        return if (isStart2Coin) START2COIN_SUPPORT_EMAIL else TANGEM_SUPPORT_EMAIL
-    }
-
-    private fun getSubject(isStart2Coin: Boolean): String {
-        return resources.getString(
-            if (isStart2Coin) {
-                R.string.feedback_subject_support
-            } else {
-                R.string.feedback_subject_support_tangem
-            },
-        )
-    }
-
-    private suspend fun createMessage(cardInfo: CardInfo): String {
-        return StringBuilder().apply {
-            append(resources.getString(R.string.feedback_preface_support))
-            skipLine()
-            append(resources.getString(R.string.feedback_data_collection_message))
-            skipLine()
-            append(
-                FeedbackDataBuilder().apply {
-                    addUserWalletsInfo(userWalletsInfo = feedbackRepository.getUserWalletsInfo())
-                    addDelimiter()
-                    addCardInfo(cardInfo)
-                    addDelimiter()
-                    addBlockchainInfoList(blockchainInfoList = feedbackRepository.getBlockchainInfoList())
-                    addDelimiter()
-                    addPhoneInfo(phoneInfo = feedbackRepository.getPhoneInfo())
-                }.build(),
-            )
-        }.toString()
-    }
-
-    private suspend fun getLogs(): String {
-        val builder = StringBuilder()
-
-        var sum = 0
-        val appLogs = feedbackRepository.getAppLogs()
-        for (i in appLogs.lastIndex downTo 0) {
-            val log = appLogs[i]
-            val date = dateFormatter.print(DateTime(log.timestamp))
-
-            val formattedLog = "$date: ${log.message}\n"
-
-            sum += formattedLog.length
-            if (sum < GMAIL_MAX_FILE_SIZE) {
-                builder.insert(0, formattedLog)
-            } else {
-                break
-            }
-        }
-
-        return builder.toString()
-    }
-
-    private companion object {
-        const val START2COIN_SUPPORT_EMAIL = "cardsupport@start2coin.com"
-        const val TANGEM_SUPPORT_EMAIL = "support@tangem.com"
-        const val GMAIL_MAX_FILE_SIZE = 24_900_000 // ≈ 25 MB
-    }
-}

domain/feedback/src/main/java/com/tangem/domain/feedback/models/FeedbackEmail.kt

@@ -2,7 +2,7 @@ package com.tangem.domain.feedback.models
 
 import java.io.File
 
-data class SupportFeedbackEmail(
+data class FeedbackEmail(
     val address: String,
     val subject: String,
     val message: String,