Updated on 2026-08-14

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

@@ -120,4 +120,10 @@ internal object SettingsDomainModule {
     ): ShouldShowSwapPromoTokenUseCase {
         return ShouldShowSwapPromoTokenUseCase(swapPromoRepository)
     }
+
+    @Provides
+    @ViewModelScoped
+    fun provideDeleteDeprecatedLogsUseCase(settingsRepository: SettingsRepository): DeleteDeprecatedLogsUseCase {
+        return DeleteDeprecatedLogsUseCase(settingsRepository)
+    }
 }

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

@@ -5,8 +5,11 @@ 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.screen.ComposeFragment
 import com.tangem.core.ui.theme.AppThemeModeHolder
+import com.tangem.domain.feedback.FeedbackManagerFeatureToggles
+import com.tangem.domain.feedback.GetSupportFeedbackEmailUseCase
 import com.tangem.domain.wallets.repository.WalletsRepository
 import com.tangem.tap.common.analytics.events.Settings
 import com.tangem.tap.features.details.redux.DetailsState
@@ -24,11 +27,26 @@ 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
+
     private lateinit var detailsViewModel: DetailsViewModel
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        detailsViewModel = DetailsViewModel(store, walletsRepository)
+        detailsViewModel = DetailsViewModel(
+            store = store,
+            walletsRepository = walletsRepository,
+            feedbackManagerFeatureToggles = feedbackManagerFeatureToggles,
+            getSupportFeedbackEmailUseCase = getSupportFeedbackEmailUseCase,
+            emailSender = emailSender,
+        )
         Analytics.send(Settings.ScreenOpened())
     }
 

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

@@ -6,11 +6,14 @@ import com.tangem.common.extensions.guard
 import com.tangem.core.analytics.Analytics
 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.repository.WalletsRepository
 import com.tangem.tap.common.analytics.events.Settings
 import com.tangem.tap.common.extensions.addContext
@@ -24,6 +27,7 @@ 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.tap.userWalletsListManager
 import com.tangem.wallet.BuildConfig
@@ -35,6 +39,7 @@ 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
 
@@ -42,6 +47,9 @@ 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,
 ) {
 
     var detailsScreenState: MutableState<DetailsScreenState> = mutableStateOf(updateState(store.state.detailsState))
@@ -138,7 +146,21 @@ internal class DetailsViewModel(
 
     private fun sendFeedback() {
         Analytics.send(Settings.ButtonSendFeedback())
-        store.dispatchOnMain(GlobalAction.SendEmail(FeedbackEmail()))
+        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()))
+        }
     }
 
     private fun navigateToAppSettings() {

app/src/main/java/com/tangem/tap/features/main/MainViewModel.kt

@@ -10,6 +10,7 @@ import com.tangem.domain.balancehiding.BalanceHidingSettings
 import com.tangem.domain.balancehiding.GetBalanceHidingSettingsUseCase
 import com.tangem.domain.balancehiding.ListenToFlipsUseCase
 import com.tangem.domain.balancehiding.UpdateBalanceHidingSettingsUseCase
+import com.tangem.domain.settings.DeleteDeprecatedLogsUseCase
 import com.tangem.tap.features.main.model.MainScreenState
 import com.tangem.utils.coroutines.CoroutineDispatcherProvider
 import dagger.hilt.android.lifecycle.HiltViewModel
@@ -17,12 +18,14 @@ import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
 import javax.inject.Inject
 
+@Suppress("LongParameterList")
 @HiltViewModel
 internal class MainViewModel @Inject constructor(
     private val updateBalanceHidingSettingsUseCase: UpdateBalanceHidingSettingsUseCase,
     private val listenToFlipsUseCase: ListenToFlipsUseCase,
     private val reduxNavController: ReduxNavController,
     private val fetchAppCurrenciesUseCase: FetchAppCurrenciesUseCase,
+    private val deleteDeprecatedLogsUseCase: DeleteDeprecatedLogsUseCase,
     private val dispatchers: CoroutineDispatcherProvider,
     getBalanceHidingSettingsUseCase: GetBalanceHidingSettingsUseCase,
 ) : ViewModel(), MainIntents {
@@ -41,6 +44,10 @@ internal class MainViewModel @Inject constructor(
         observeFlips()
         displayBalancesHidingStatusToast()
         displayHiddenBalancesModalNotification()
+
+        viewModelScope.launch(dispatchers.main) {
+            deleteDeprecatedLogsUseCase()
+        }
     }
 
     private fun updateAppCurrencies() {

data/feedback/src/main/java/com/tangem/data/feedback/DefaultFeedbackRepository.kt

@@ -59,9 +59,10 @@ internal class DefaultFeedbackRepository(
     override suspend fun getAppLogs(): List<AppLogModel> {
         return appPreferencesStore.getObjectMap<String>(key = PreferencesKeys.APP_LOGS_KEY)
             .map { AppLogModel(timestamp = it.key.toLong(), message = it.value) }
+            .sortedBy(AppLogModel::timestamp)
     }
 
-    override suspend fun createLogFile(logs: List<String>): File? {
+    override suspend fun createLogFile(logs: String): File? {
         return try {
             val file = File(context.filesDir, LOGS_FILE)
             file.delete()
@@ -69,7 +70,7 @@ internal class DefaultFeedbackRepository(
 
             val stringWriter = StringWriter()
 
-            logs.forEach(stringWriter::append)
+            stringWriter.append(logs)
 
             val fileWriter = FileWriter(file)
             fileWriter.write(stringWriter.toString())

data/settings/src/main/java/com/tangem/data/settings/DefaultSettingsRepository.kt

@@ -44,22 +44,21 @@ internal class DefaultSettingsRepository(
         }
     }
 
-    override suspend fun deleteDeprecatedLogs() {
+    override suspend fun deleteDeprecatedLogs(maxSize: Int) {
-        val threeDaysAgo = getThreeDaysAgoTimestamp()
-
         appPreferencesStore.editData { preferences ->
             val savedLogs = preferences.getObjectMap<String>(PreferencesKeys.APP_LOGS_KEY)
 
+            var sum = 0
             preferences.setObjectMap(
                 key = PreferencesKeys.APP_LOGS_KEY,
-                value = savedLogs.filterKeys { it.toLong() > threeDaysAgo },
+                value = savedLogs.entries
+                    .sortedBy(Map.Entry<String, String>::key)
+                    .takeLastWhile {
+                        sum += it.value.length
+                        sum < maxSize
+                    }
+                    .associate { it.key to it.value },
             )
         }
     }
-
-    private fun getThreeDaysAgoTimestamp(): Long = DateTime.now().minusDays(THREE_DAYS).millis
-
-    private companion object {
-        const val THREE_DAYS = 3
-    }
 }

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

@@ -81,15 +81,31 @@ class GetSupportFeedbackEmailUseCase(
         }.toString()
     }
 
-    private suspend fun getLogs(): List<String> {
+    private suspend fun getLogs(): String {
-        return feedbackRepository.getAppLogs().map {
+        val builder = StringBuilder()
-            val date = dateFormatter.print(DateTime(it.timestamp))
+
-            "$date: ${it.message}\n"
+        var sum = 0
+        val appLogs = feedbackRepository.getAppLogs()
+        for (i in appLogs.lastIndex downTo 0) {
+            val log = appLogs[i]
+            val date = dateFormatter.print(DateTime(log.timestamp))
+
+            val formattedLog = "$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/repository/FeedbackRepository.kt

@@ -16,5 +16,5 @@ interface FeedbackRepository {
 
     suspend fun getAppLogs(): List<AppLogModel>
 
-    suspend fun createLogFile(logs: List<String>): File?
+    suspend fun createLogFile(logs: String): File?
 }

domain/settings/src/main/java/com/tangem/domain/settings/DeleteDeprecatedLogsUseCase.kt

@@ -0,0 +1,16 @@
+package com.tangem.domain.settings
+
+import com.tangem.domain.settings.repositories.SettingsRepository
+
+class DeleteDeprecatedLogsUseCase(
+    private val settingsRepository: SettingsRepository,
+) {
+
+    suspend operator fun invoke() {
+        settingsRepository.deleteDeprecatedLogs(maxSize = MAX_LOGS_SIZE)
+    }
+
+    private companion object {
+        const val MAX_LOGS_SIZE = 24_900_000 // ≈ 25 MB
+    }
+}

domain/settings/src/main/java/com/tangem/domain/settings/repositories/SettingsRepository.kt

@@ -12,5 +12,5 @@ interface SettingsRepository {
     suspend fun updateAppLogs(message: String)
 
     @Throws
-    suspend fun deleteDeprecatedLogs()
+    suspend fun deleteDeprecatedLogs(maxSize: Int)
 }