Updated on 2026-08-14

common/ui/src/main/java/com/tangem/common/ui/notifications/NotificationUM.kt

@@ -235,6 +235,11 @@ sealed class NotificationUM(val config: NotificationConfig) {
             subtitle = resourceReference(id = R.string.send_notification_fee_too_high_text, wrappedList(value)),
         )
 
+        data object HighNetworkFee : Warning(
+            title = resourceReference(id = R.string.high_fee_warning_title),
+            subtitle = resourceReference(id = R.string.high_fee_warning_description),
+        )
+
         data class NetworkFeeUnreachable(val onRefresh: () -> Unit) : Warning(
             title = resourceReference(R.string.send_fee_unreachable_error_title),
             subtitle = resourceReference(R.string.send_fee_unreachable_error_text),

core/config-toggles/src/main/assets/configs/feature_toggles_config.json

@@ -179,6 +179,10 @@
         "name": "TWI_1469_FOR_YOU_ENABLED",
         "version": "undefined"
     },
+    {
+        "name": "TWI_1367_HIGH_FEE_WARNING_ENABLED",
+        "version": "undefined"
+    },
     {
         "name": "TWI_1638_VA_MVP0_ENABLED",
         "version": "6.1"

data/quotes/src/main/java/com/tangem/data/quotes/di/QuotesDataModule.kt

@@ -15,6 +15,7 @@ import com.tangem.datasource.local.datastore.RuntimeSharedStore
 import com.tangem.datasource.utils.MoshiDataStoreSerializer
 import com.tangem.datasource.utils.mapWithStringKeyTypes
 import com.tangem.domain.quotes.GetCurrencyUSDQuoteUseCase
+import com.tangem.domain.quotes.IsHighNetworkFeeUseCase
 import com.tangem.domain.quotes.QuotesRepository
 import com.tangem.domain.quotes.multi.MultiQuoteStatusFetcher
 import com.tangem.domain.quotes.multi.MultiQuoteUpdater
@@ -79,4 +80,12 @@ internal object QuotesDataModule {
     fun provideGetCurrencyUSDQuoteUseCase(quotesRepository: QuotesRepository): GetCurrencyUSDQuoteUseCase {
         return GetCurrencyUSDQuoteUseCase(quotesRepository)
     }
+
+    @Singleton
+    @Provides
+    fun provideIsHighNetworkFeeUseCase(
+        getCurrencyUSDQuoteUseCase: GetCurrencyUSDQuoteUseCase,
+    ): IsHighNetworkFeeUseCase {
+        return IsHighNetworkFeeUseCase(getCurrencyUSDQuoteUseCase)
+    }
 }

domain/quotes/build.gradle.kts

@@ -6,4 +6,6 @@ plugins {
 dependencies {
     api(projects.domain.core)
     api(projects.domain.models)
+
+    testImplementation(projects.test.core)
 }

domain/quotes/src/main/java/com/tangem/domain/quotes/IsHighNetworkFeeUseCase.kt

@@ -0,0 +1,27 @@
+package com.tangem.domain.quotes
+
+import com.tangem.domain.models.currency.CryptoCurrency
+import java.math.BigDecimal
+
+/**
+ * Checks whether a network fee is higher than a single hardcoded USD threshold, applied uniformly
+ * across all networks. The fee USD value is computed from the fee currency's USD quote
+ * ([GetCurrencyUSDQuoteUseCase]), independent of the user's selected app currency.
+ *
+ * Returns `false` when there is no USD quote or no raw currency id — never warn without pricing data.
+ */
+class IsHighNetworkFeeUseCase(
+    private val getCurrencyUSDQuoteUseCase: GetCurrencyUSDQuoteUseCase,
+) {
+
+    suspend operator fun invoke(feeCurrency: CryptoCurrency, feeAmount: BigDecimal): Boolean {
+        val rawCurrencyId = feeCurrency.id.rawCurrencyId ?: return false
+        val usdRate = getCurrencyUSDQuoteUseCase(rawCurrencyId) ?: return false
+
+        return feeAmount.multiply(usdRate) > HIGH_FEE_USD_THRESHOLD
+    }
+
+    private companion object {
+        val HIGH_FEE_USD_THRESHOLD = BigDecimal("10")
+    }
+}

domain/quotes/src/test/kotlin/com/tangem/domain/quotes/IsHighNetworkFeeUseCaseTest.kt

@@ -0,0 +1,87 @@
+package com.tangem.domain.quotes
+
+import com.google.common.truth.Truth.assertThat
+import com.tangem.domain.models.currency.CryptoCurrency
+import io.mockk.clearMocks
+import io.mockk.coEvery
+import io.mockk.every
+import io.mockk.mockk
+import kotlinx.coroutines.test.runTest
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import java.math.BigDecimal
+
+internal class IsHighNetworkFeeUseCaseTest {
+
+    private val getCurrencyUSDQuoteUseCase: GetCurrencyUSDQuoteUseCase = mockk()
+    private val feeCurrency: CryptoCurrency = mockk()
+    private val rawCurrencyId = CryptoCurrency.RawID("bitcoin")
+
+    private val useCase = IsHighNetworkFeeUseCase(getCurrencyUSDQuoteUseCase)
+
+    @BeforeEach
+    fun setup() {
+        clearMocks(getCurrencyUSDQuoteUseCase, feeCurrency)
+        every { feeCurrency.id.rawCurrencyId } returns rawCurrencyId
+    }
+
+    @Test
+    fun `GIVEN fee usd value above threshold WHEN invoke THEN returns true`() = runTest {
+        // Arrange — 0.5 coin * 25 USD = 12.5 USD > 10
+        coEvery { getCurrencyUSDQuoteUseCase(rawCurrencyId) } returns BigDecimal("25")
+
+        // Act
+        val result = useCase(feeCurrency, BigDecimal("0.5"))
+
+        // Assert
+        assertThat(result).isTrue()
+    }
+
+    @Test
+    fun `GIVEN fee usd value below threshold WHEN invoke THEN returns false`() = runTest {
+        // Arrange — 0.2 coin * 25 USD = 5 USD < 10
+        coEvery { getCurrencyUSDQuoteUseCase(rawCurrencyId) } returns BigDecimal("25")
+
+        // Act
+        val result = useCase(feeCurrency, BigDecimal("0.2"))
+
+        // Assert
+        assertThat(result).isFalse()
+    }
+
+    @Test
+    fun `GIVEN fee usd value equal to threshold WHEN invoke THEN returns false`() = runTest {
+        // Arrange — 0.4 coin * 25 USD = 10 USD, not strictly above threshold
+        coEvery { getCurrencyUSDQuoteUseCase(rawCurrencyId) } returns BigDecimal("25")
+
+        // Act
+        val result = useCase(feeCurrency, BigDecimal("0.4"))
+
+        // Assert
+        assertThat(result).isFalse()
+    }
+
+    @Test
+    fun `GIVEN no usd quote WHEN invoke THEN returns false`() = runTest {
+        // Arrange
+        coEvery { getCurrencyUSDQuoteUseCase(rawCurrencyId) } returns null
+
+        // Act
+        val result = useCase(feeCurrency, BigDecimal("100"))
+
+        // Assert
+        assertThat(result).isFalse()
+    }
+
+    @Test
+    fun `GIVEN no raw currency id WHEN invoke THEN returns false`() = runTest {
+        // Arrange
+        every { feeCurrency.id.rawCurrencyId } returns null
+
+        // Act
+        val result = useCase(feeCurrency, BigDecimal("100"))
+
+        // Assert
+        assertThat(result).isFalse()
+    }
+}

features/send/api/src/main/java/com/tangem/features/send/api/SendFeatureToggles.kt

@@ -1,3 +1,5 @@
 package com.tangem.features.send.api
 
-interface SendFeatureToggles
+interface SendFeatureToggles {
+    val isHighFeeWarningEnabled: Boolean
+}

features/send/impl/src/main/java/com/tangem/features/send/DefaultSendFeatureToggles.kt

@@ -1,6 +1,16 @@
 package com.tangem.features.send
 
+import com.tangem.core.configtoggle.FeatureToggles
+import com.tangem.core.configtoggle.feature.FeatureTogglesManager
 import com.tangem.features.send.api.SendFeatureToggles
 import javax.inject.Inject
 
-internal class DefaultSendFeatureToggles @Inject constructor() : SendFeatureToggles
+internal class DefaultSendFeatureToggles @Inject constructor(
+    private val featureTogglesManager: FeatureTogglesManager,
+) : SendFeatureToggles {
+
+    override val isHighFeeWarningEnabled: Boolean
+        get() = featureTogglesManager.isFeatureEnabled(
+            toggle = FeatureToggles.TWI_1367_HIGH_FEE_WARNING_ENABLED,
+        )
+}

features/send/impl/src/main/java/com/tangem/features/send/send/confirm/model/SendConfirmModel.kt

@@ -34,6 +34,7 @@ import com.tangem.domain.feedback.models.FeedbackEmailType
 import com.tangem.domain.models.currency.CryptoCurrency
 import com.tangem.domain.models.currency.CryptoCurrencyStatus
 import com.tangem.domain.models.wallet.isHotWallet
+import com.tangem.domain.quotes.IsHighNetworkFeeUseCase
 import com.tangem.domain.settings.IsSendTapHelpEnabledUseCase
 import com.tangem.domain.settings.NeverShowTapHelpUseCase
 import com.tangem.domain.tokens.IsAmountSubtractAvailableUseCase
@@ -43,6 +44,7 @@ import com.tangem.domain.transaction.usecase.SendTransactionUseCase
 import com.tangem.domain.transaction.usecase.gasless.CreateAndSendGaslessTransactionUseCase
 import com.tangem.domain.txhistory.usecase.GetExplorerTransactionUrlUseCase
 import com.tangem.domain.utils.convertToSdkAmount
+import com.tangem.features.send.api.SendFeatureToggles
 import com.tangem.features.send.api.analytics.CommonSendAnalyticEvents
 import com.tangem.features.send.api.analytics.CommonSendAnalyticEvents.SendScreenSource
 import com.tangem.features.send.api.subcomponents.amount.SendAmountReduceTrigger
@@ -113,6 +115,8 @@ internal class SendConfirmModel @Inject constructor(
     private val manageCryptoCurrenciesUseCase: ManageCryptoCurrenciesUseCase,
     private val currenciesRepository: CurrenciesRepository,
     private val createAndSendGaslessTransactionUseCase: CreateAndSendGaslessTransactionUseCase,
+    private val isHighNetworkFeeUseCase: IsHighNetworkFeeUseCase,
+    private val sendFeatureToggles: SendFeatureToggles,
     sendBalanceUpdaterFactory: SendBalanceUpdater.Factory,
 ) : Model(), SendConfirmClickIntents, FeeSelectorModelCallback, SendNotificationsComponent.ModelCallback {
 
@@ -503,6 +507,7 @@ internal class SendConfirmModel @Inject constructor(
 
     private fun updateConfirmNotifications() {
         modelScope.launch {
+            val feeCryptoCurrencyStatus = getCurrencyStatusForFeePayment()
             notificationsUpdateTrigger.triggerUpdate(
                 data = NotificationData(
                     destinationAddress = confirmData.enteredDestination.orEmpty(),
@@ -512,9 +517,10 @@ internal class SendConfirmModel @Inject constructor(
                     isIgnoreReduce = confirmData.isIgnoreReduce,
                     fee = confirmData.fee,
                     feeError = confirmData.feeError,
-                    feeCryptoCurrencyStatus = getCurrencyStatusForFeePayment(),
+                    feeCryptoCurrencyStatus = feeCryptoCurrencyStatus,
                 ),
             )
+            val isHighNetworkFee = isHighNetworkFee(feeCryptoCurrencyStatus.currency)
             _uiState.update { state ->
                 state.copy(
                     confirmUM = SendConfirmationNotificationsTransformerV2(
@@ -524,12 +530,19 @@ internal class SendConfirmModel @Inject constructor(
                         cryptoCurrency = cryptoCurrencyStatus.currency,
                         appCurrency = appCurrency,
                         analyticsCategoryName = params.analyticsCategoryName,
+                        isHighNetworkFee = isHighNetworkFee,
                     ).transform(uiState.value.confirmUM),
                 )
             }
         }
     }
 
+    private suspend fun isHighNetworkFee(feeCurrency: CryptoCurrency): Boolean {
+        if (!sendFeatureToggles.isHighFeeWarningEnabled) return false
+        val feeAmount = confirmData.fee?.amount?.value ?: return false
+        return isHighNetworkFeeUseCase(feeCurrency, feeAmount)
+    }
+
     @Suppress("LongMethod")
     private fun configConfirmNavigation() {
         combine(

features/send/impl/src/main/java/com/tangem/features/send/send/confirm/model/transformers/SendConfirmationNotificationsTransformerV2.kt

@@ -29,6 +29,7 @@ internal class SendConfirmationNotificationsTransformerV2(
     private val cryptoCurrency: CryptoCurrency,
     private val appCurrency: AppCurrency,
     private val analyticsCategoryName: String,
+    private val isHighNetworkFee: Boolean = false,
 ) : Transformer<ConfirmUM> {
     override fun transform(prevState: ConfirmUM): ConfirmUM {
         val state = prevState as? ConfirmUM.Content ?: return prevState
@@ -38,10 +39,17 @@ internal class SendConfirmationNotificationsTransformerV2(
             notifications = buildList {
                 addTooHighNotification(feeSelectorUM)
                 addTooLowNotification(feeSelectorUM)
+                addHighNetworkFeeNotification()
             }.toPersistentList(),
         )
     }
 
+    private fun MutableList<NotificationUM>.addHighNetworkFeeNotification() {
+        if (isHighNetworkFee) {
+            add(NotificationUM.Warning.HighNetworkFee)
+        }
+    }
+
     private fun MutableList<NotificationUM>.addTooLowNotification(feeSelectorUM: FeeSelectorUM.Content) {
         if (FeeCalculationUtils.checkIfCustomFeeTooLow(feeSelectorUM)) {
             add(NotificationUM.Warning.FeeTooLow)

features/send/impl/src/test/java/com/tangem/features/send/send/SendModelTestBase.kt

@@ -23,6 +23,7 @@ import com.tangem.domain.models.wallet.UserWallet
 import com.tangem.domain.models.wallet.UserWalletId
 import com.tangem.domain.qrscanning.usecases.ListenToQrScanningUseCase
 import com.tangem.domain.qrscanning.usecases.ParseQrCodeUseCase
+import com.tangem.domain.quotes.IsHighNetworkFeeUseCase
 import com.tangem.domain.transaction.usecase.CreateTransferTransactionUseCase
 import com.tangem.domain.transaction.usecase.GetFeeUseCase
 import com.tangem.domain.transaction.usecase.SendTransactionUseCase
@@ -30,6 +31,7 @@ import com.tangem.domain.transaction.usecase.gasless.GetFeeForGaslessUseCase
 import com.tangem.domain.transaction.usecase.gasless.GetFeeForTokenUseCase
 import com.tangem.domain.wallets.usecase.GetUserWalletUseCase
 import com.tangem.features.send.api.SendComponent
+import com.tangem.features.send.api.SendFeatureToggles
 import com.tangem.features.send.api.analytics.CommonSendAnalyticEvents
 import com.tangem.features.send.api.entity.PredefinedValues
 import com.tangem.features.send.api.subcomponents.feeSelector.FeeSelectorCheckReloadListener
@@ -122,6 +124,8 @@ internal abstract class SendModelTestBase {
     protected val manageCryptoCurrenciesUseCase: ManageCryptoCurrenciesUseCase = mockk(relaxed = true)
     protected val currenciesRepository: CurrenciesRepository = mockk(relaxed = true)
     protected val createAndSendGaslessTransactionUseCase: CreateAndSendGaslessTransactionUseCase = mockk(relaxed = true)
+    protected val isHighNetworkFeeUseCase: IsHighNetworkFeeUseCase = mockk(relaxed = true)
+    protected val sendFeatureToggles: SendFeatureToggles = mockk(relaxed = true)
     protected val sendAnalyticHelper: SendAnalyticHelper = mockk(relaxed = true)
     protected val sendBalanceUpdaterFactory: SendBalanceUpdater.Factory = mockk(relaxed = true)
 
@@ -233,6 +237,8 @@ internal abstract class SendModelTestBase {
             manageCryptoCurrenciesUseCase = manageCryptoCurrenciesUseCase,
             currenciesRepository = currenciesRepository,
             createAndSendGaslessTransactionUseCase = createAndSendGaslessTransactionUseCase,
+            isHighNetworkFeeUseCase = isHighNetworkFeeUseCase,
+            sendFeatureToggles = sendFeatureToggles,
             sendBalanceUpdaterFactory = sendBalanceUpdaterFactory,
         )
     }

features/send/impl/src/test/java/com/tangem/features/send/send/confirm/model/transformers/SendConfirmationNotificationsTransformerV2Test.kt

@@ -76,6 +76,7 @@ class SendConfirmationNotificationsTransformerV2Test {
             cryptoCurrency = cryptoCurrency,
             appCurrency = appCurrency,
             analyticsCategoryName = analyticsCategoryName,
+            isHighNetworkFee = false,
         )
         val initialState: ConfirmUM = ConfirmUM.Empty
 
@@ -98,6 +99,7 @@ class SendConfirmationNotificationsTransformerV2Test {
             cryptoCurrency = cryptoCurrency,
             appCurrency = appCurrency,
             analyticsCategoryName = analyticsCategoryName,
+            isHighNetworkFee = false,
         )
         val initialState = createTestConfirmUM()
 
@@ -120,6 +122,7 @@ class SendConfirmationNotificationsTransformerV2Test {
             cryptoCurrency = cryptoCurrency,
             appCurrency = appCurrency,
             analyticsCategoryName = analyticsCategoryName,
+            isHighNetworkFee = false,
         )
         val initialState = createTestConfirmUM()
 
@@ -145,6 +148,7 @@ class SendConfirmationNotificationsTransformerV2Test {
             cryptoCurrency = cryptoCurrency,
             appCurrency = appCurrency,
             analyticsCategoryName = analyticsCategoryName,
+            isHighNetworkFee = false,
         )
         val initialState = createTestConfirmUM()
 
@@ -158,6 +162,31 @@ class SendConfirmationNotificationsTransformerV2Test {
         assertThat(content.notifications.first()).isInstanceOf(NotificationUM.Warning.TooHigh::class.java)
     }
 
+    @Test
+    fun `GIVEN high network fee WHEN transform THEN returns state with high network fee notification`() = runTest {
+        // GIVEN
+        val feeSelectorUM = createNormalFeeSelectorUM()
+        val amountUM = createTestAmountUM()
+        val transformer = SendConfirmationNotificationsTransformerV2(
+            feeSelectorUM = feeSelectorUM,
+            amountUM = amountUM,
+            analyticsEventHandler = analyticsEventHandler,
+            cryptoCurrency = cryptoCurrency,
+            appCurrency = appCurrency,
+            analyticsCategoryName = analyticsCategoryName,
+            isHighNetworkFee = true,
+        )
+        val initialState = createTestConfirmUM()
+
+        // WHEN
+        val result = transformer.transform(initialState)
+
+        // THEN
+        assertThat(result).isInstanceOf(ConfirmUM.Content::class.java)
+        val content = result as ConfirmUM.Content
+        assertThat(content.notifications).containsExactly(NotificationUM.Warning.HighNetworkFee)
+    }
+
     @Test
     fun `GIVEN fee too low WHEN transform THEN returns state with too low notification`() = runTest {
         // GIVEN
@@ -170,6 +199,7 @@ class SendConfirmationNotificationsTransformerV2Test {
             cryptoCurrency = cryptoCurrency,
             appCurrency = appCurrency,
             analyticsCategoryName = analyticsCategoryName,
+            isHighNetworkFee = false,
         )
         val initialState = createTestConfirmUM()
 
@@ -196,6 +226,7 @@ class SendConfirmationNotificationsTransformerV2Test {
             cryptoCurrency = cryptoCurrency,
             appCurrency = appCurrency,
             analyticsCategoryName = analyticsCategoryName,
+            isHighNetworkFee = false,
         )
         val initialState = createTestConfirmUM()
 

features/swap-v2/api/src/main/java/com/tangem/features/swap/v2/api/SwapFeatureToggles.kt

@@ -2,4 +2,5 @@ package com.tangem.features.swap.v2.api
 
 interface SwapFeatureToggles {
     val isSwapProviderFilterEnabled: Boolean
+    val isHighFeeWarningEnabled: Boolean
 }

features/swap-v2/impl/src/main/java/com/tangem/features/swap/v2/impl/DefaultSwapFeatureToggles.kt

@@ -10,4 +10,7 @@ internal class DefaultSwapFeatureToggles @Inject constructor(
 ) : SwapFeatureToggles {
     override val isSwapProviderFilterEnabled: Boolean =
         featureToggles.isFeatureEnabled(FeatureToggles.AND_15009_SWAP_PROVIDER_FILTER_ENABLED)
+
+    override val isHighFeeWarningEnabled: Boolean =
+        featureToggles.isFeatureEnabled(FeatureToggles.TWI_1367_HIGH_FEE_WARNING_ENABLED)
 }

features/swap-v2/impl/src/main/java/com/tangem/features/swap/v2/impl/sendviaswap/confirm/model/SendWithSwapConfirmModel.kt

@@ -27,6 +27,7 @@ import com.tangem.domain.models.account.derivationIndex
 import com.tangem.domain.models.currency.CryptoCurrency
 import com.tangem.domain.models.currency.CryptoCurrencyStatus
 import com.tangem.domain.models.wallet.isHotWallet
+import com.tangem.domain.quotes.IsHighNetworkFeeUseCase
 import com.tangem.domain.settings.IsSendTapHelpEnabledUseCase
 import com.tangem.domain.swap.models.SwapAmountType
 import com.tangem.domain.swap.models.SwapDirection.Companion.withSwapDirection
@@ -47,6 +48,7 @@ import com.tangem.features.send.api.subcomponents.destination.entity.Destination
 import com.tangem.features.send.api.subcomponents.feeSelector.FeeSelectorReloadTrigger
 import com.tangem.features.send.api.subcomponents.notifications.SendNotificationsUpdateListener
 import com.tangem.features.send.api.subcomponents.notifications.SendNotificationsUpdateTrigger
+import com.tangem.features.swap.v2.api.SwapFeatureToggles
 import com.tangem.features.swap.v2.api.subcomponents.SwapAmountUpdateTrigger
 import com.tangem.features.swap.v2.impl.R
 import com.tangem.features.swap.v2.impl.amount.SwapAmountReduceTrigger
@@ -89,6 +91,8 @@ internal class SendWithSwapConfirmModel @Inject constructor(
     private val estimateFeeForTokenUseCase: EstimateFeeForTokenUseCase,
     private val estimateFeeForGaslessTxUseCase: EstimateFeeForGaslessTxUseCase,
     private val isAmountSubtractAvailableUseCase: IsAmountSubtractAvailableUseCase,
+    private val isHighNetworkFeeUseCase: IsHighNetworkFeeUseCase,
+    private val swapFeatureToggles: SwapFeatureToggles,
     private val getExplorerTransactionUrlUseCase: GetExplorerTransactionUrlUseCase,
     private val sendNotificationsUpdateTrigger: SendNotificationsUpdateTrigger,
     private val swapNotificationsUpdateTrigger: SwapNotificationsUpdateTrigger,
@@ -467,12 +471,19 @@ internal class SendWithSwapConfirmModel @Inject constructor(
                     feeValue = confirmData.fee?.amount?.value,
                 ),
             )
+            val isHighNetworkFee = isHighNetworkFee(feeCryptoCurrencyStatus.currency)
             uiState.transformerUpdate(
-                SendWithSwapConfirmationNotificationsTransformer(),
+                SendWithSwapConfirmationNotificationsTransformer(isHighNetworkFee = isHighNetworkFee),
             )
         }
     }
 
+    private suspend fun isHighNetworkFee(feeCurrency: CryptoCurrency): Boolean {
+        if (!swapFeatureToggles.isHighFeeWarningEnabled) return false
+        val feeAmount = confirmData.fee?.amount?.value ?: return false
+        return isHighNetworkFeeUseCase(feeCurrency, feeAmount)
+    }
+
     private fun subscribeOnNotificationUpdates() {
         combine(
             flow = sendNotificationsUpdateListener.hasErrorFlow,

features/swap-v2/impl/src/main/java/com/tangem/features/swap/v2/impl/sendviaswap/confirm/model/transformers/SendWithSwapConfirmationNotificationsTransformer.kt

@@ -22,7 +22,9 @@ import com.tangem.features.swap.v2.impl.sendviaswap.entity.SendWithSwapUM
 import com.tangem.utils.transformer.Transformer
 import kotlinx.collections.immutable.toPersistentList
 
-internal class SendWithSwapConfirmationNotificationsTransformer : Transformer<SendWithSwapUM> {
+internal class SendWithSwapConfirmationNotificationsTransformer(
+    private val isHighNetworkFee: Boolean,
+) : Transformer<SendWithSwapUM> {
     override fun transform(prevState: SendWithSwapUM): SendWithSwapUM {
         val confirmUM = prevState.confirmUM as? ConfirmUM.Content ?: return prevState
         val feeSelectorUM = prevState.feeSelectorUM as? FeeSelectorUM.Content ?: return prevState
@@ -34,11 +36,18 @@ internal class SendWithSwapConfirmationNotificationsTransformer : Transformer<Se
                 notifications = buildList {
                     addTooHighNotification(feeSelectorUM = feeSelectorUM)
                     addTooLowNotification(feeSelectorUM = feeSelectorUM)
+                    addHighNetworkFeeNotification()
                 }.toPersistentList(),
             ),
         )
     }
 
+    private fun MutableList<NotificationUM>.addHighNetworkFeeNotification() {
+        if (isHighNetworkFee) {
+            add(NotificationUM.Warning.HighNetworkFee)
+        }
+    }
+
     private fun MutableList<NotificationUM>.addTooLowNotification(feeSelectorUM: FeeSelectorUM.Content) {
         if (checkIfCustomFeeTooLow(feeSelectorUM = feeSelectorUM)) {
             add(NotificationUM.Warning.FeeTooLow)

features/swap/api/src/main/kotlin/com/tangem/features/swap/SwapFeatureToggles.kt

@@ -10,4 +10,5 @@ interface SwapFeatureToggles {
     val isSwapPredefinedButtonsEnabled: Boolean
     val isExpressShareButtonEnabled: Boolean
     val isSwapBestDexRateEnabled: Boolean
+    val isHighFeeWarningEnabled: Boolean
 }

features/swap/impl/src/main/java/com/tangem/feature/swap/DefaultSwapFeatureToggles.kt

@@ -52,4 +52,9 @@ internal class DefaultSwapFeatureToggles @Inject constructor(
         get() = featureTogglesManager.isFeatureEnabled(
             toggle = FeatureToggles.AND_15715_SWAP_BEST_DEX_RATE_ENABLED,
         ) && isSwapIntegratedApproveEnabled
+
+    override val isHighFeeWarningEnabled: Boolean
+        get() = featureTogglesManager.isFeatureEnabled(
+            toggle = FeatureToggles.TWI_1367_HIGH_FEE_WARNING_ENABLED,
+        )
 }

features/swap/impl/src/main/java/com/tangem/feature/swap/model/SwapModel.kt

@@ -65,6 +65,7 @@ import com.tangem.domain.models.wallet.UserWalletId
 import com.tangem.domain.models.wallet.isHotWallet
 import com.tangem.domain.pay.WithdrawalResult
 import com.tangem.domain.pay.usecase.GetPaymentAccountCryptoCurrencyStatusUseCase
+import com.tangem.domain.quotes.IsHighNetworkFeeUseCase
 import com.tangem.domain.settings.usercountry.GetUserCountryUseCase
 import com.tangem.domain.settings.usercountry.models.UserCountry
 import com.tangem.domain.settings.usercountry.models.needApplyFCARestrictions
@@ -173,6 +174,7 @@ internal class SwapModel @Inject constructor(
     private val getSwapUiModeUseCase: GetSwapUiModeUseCase,
     private val setSwapUiModeUseCase: SetSwapUiModeUseCase,
     private val calculateAmountUseCase: CalculateAmountUseCase,
+    private val isHighNetworkFeeUseCase: IsHighNetworkFeeUseCase,
 ) : Model() {
 
     private val params = paramsContainer.require<SwapComponent.Params>()
@@ -1103,7 +1105,7 @@ internal class SwapModel @Inject constructor(
         )
     }
 
-    private fun setupLoadedState(
+    private suspend fun setupLoadedState(
         provider: SwapProvider,
         state: SwapState,
         fromSwapCurrencyStatus: SwapCurrencyStatus,
@@ -1127,7 +1129,7 @@ internal class SwapModel @Inject constructor(
         }
     }
 
-    private fun setupQuotesLoadedUiState(provider: SwapProvider, state: SwapState.QuotesLoadedState) {
+    private suspend fun setupQuotesLoadedUiState(provider: SwapProvider, state: SwapState.QuotesLoadedState) {
         val loadedStates = dataState.getLastLoadedSuccessStates()
         val additionalBadge = SwapProviderResolver.resolveBadge(
             provider = provider,
@@ -1136,17 +1138,26 @@ internal class SwapModel @Inject constructor(
             state = state,
             isSwapBestDexRateEnabled = swapFeatureToggles.isSwapBestDexRateEnabled,
         )
+        val swapFee = getSelectedSwapFee()
         uiState = stateBuilder.createQuotesLoadedState(
             uiStateHolder = uiState,
             quoteModel = state,
             feeCryptoCurrencyStatus = dataState.feePaidCryptoCurrency,
             swapProvider = provider,
             additionalBadge = additionalBadge,
-            swapFee = getSelectedSwapFee(),
+            swapFee = swapFee,
             feeError = feeSelectorRepository.state.value as? FeeSelectorUM.Error,
+            isHighNetworkFee = isHighNetworkFee(swapFee),
         )
     }
 
+    private suspend fun isHighNetworkFee(swapFee: SwapFee?): Boolean {
+        if (!swapFeatureToggles.isHighFeeWarningEnabled) return false
+        swapFee ?: return false
+        val feeAmount = swapFee.fee.amount.value ?: return false
+        return isHighNetworkFeeUseCase(swapFee.selectedFeeToken.currency, feeAmount)
+    }
+
     private fun sendAnalyticsForNotifications(
         provider: SwapProvider,
         fromToken: CryptoCurrencyStatus,
@@ -2077,12 +2088,14 @@ internal class SwapModel @Inject constructor(
                     }
                     analyticsEventHandler.send(SwapEvents.ProviderChosen(provider))
                     uiState = stateBuilder.dismissBottomSheet(uiState)
-                    setupLoadedState(
+                    modelScope.launch {
-                        provider = provider,
+                        setupLoadedState(
-                        state = swapState,
+                            provider = provider,
-                        fromSwapCurrencyStatus = fromSwapCurrencyStatus,
+                            state = swapState,
-                        toSwapCurrencyStatus = toSwapCurrencyStatus,
+                            fromSwapCurrencyStatus = fromSwapCurrencyStatus,
-                    )
+                            toSwapCurrencyStatus = toSwapCurrencyStatus,
+                        )
+                    }
                 }
             },
             onProviderFilterSelect = { filterType ->
@@ -2823,12 +2836,14 @@ internal class SwapModel @Inject constructor(
                         }
                     },
                 )
-                setupLoadedState(
+                modelScope.launch {
-                    provider = provider,
+                    setupLoadedState(
-                    state = swapState,
+                        provider = provider,
-                    fromSwapCurrencyStatus = fromSwapCurrencyStatus,
+                        state = swapState,
-                    toSwapCurrencyStatus = toSwapCurrencyStatus,
+                        fromSwapCurrencyStatus = fromSwapCurrencyStatus,
-                )
+                        toSwapCurrencyStatus = toSwapCurrencyStatus,
+                    )
+                }
             } else {
                 TangemLogger.e("loadFee: ${feeError.error}, isHidden = true")
                 refreshTransferUIStateIfNeeded()

features/swap/impl/src/main/java/com/tangem/feature/swap/model/SwapNotificationsFactory.kt

@@ -124,6 +124,7 @@ internal class SwapNotificationsFactory(
         swapFee: SwapFee?,
         feeError: GetFeeError?,
         appRouter: AppRouter,
+        isHighNetworkFee: Boolean = false,
     ): ImmutableList<NotificationUM> {
         val warnings = buildList {
             maybeAddFeeErrorNotification(feeCryptoCurrencyStatus, quoteModel, feeError)
@@ -135,10 +136,17 @@ internal class SwapNotificationsFactory(
             maybeAddUnableCoverFeeWarning(quoteModel, feeCryptoCurrencyStatus, appRouter)
             maybeAddTransactionInProgressWarning(quoteModel)
             maybeAddPriceImpactNotification(quoteModel.priceImpact)
+            maybeAddHighNetworkFeeWarning(isHighNetworkFee)
         }
         return warnings.toPersistentList()
     }
 
+    private fun MutableList<NotificationUM>.maybeAddHighNetworkFeeWarning(isHighNetworkFee: Boolean) {
+        if (isHighNetworkFee) {
+            add(NotificationUM.Warning.HighNetworkFee)
+        }
+    }
+
     private fun MutableList<NotificationUM>.maybeAddRentExemptionError(quoteModel: SwapState.QuotesLoadedState) {
         quoteModel.currencyCheck?.rentWarning?.let {
             add(NotificationUM.Solana.RentInfo(it))

features/swap/impl/src/main/java/com/tangem/feature/swap/ui/StateBuilder.kt

@@ -577,6 +577,7 @@ internal class StateBuilder(
         additionalBadge: ProviderState.AdditionalBadge,
         swapFee: SwapFee?,
         feeError: FeeSelectorUM.Error?,
+        isHighNetworkFee: Boolean,
     ): SwapStateHolder {
         if (uiStateHolder.sendCardData !is SwapCardState.SwapCardData) return uiStateHolder
         if (uiStateHolder.receiveCardData !is SwapCardState.SwapCardData) return uiStateHolder
@@ -590,6 +591,7 @@ internal class StateBuilder(
             swapFee = swapFee,
             feeError = feeError?.error,
             appRouter = appRouter,
+            isHighNetworkFee = isHighNetworkFee,
         )
 
         val fromAccountTitleUM = when {

features/swap/impl/src/test/java/com/tangem/feature/swap/StateBuilderSwapButtonTest.kt

@@ -109,6 +109,7 @@ internal class StateBuilderSwapButtonTest {
                 additionalBadge = ProviderState.AdditionalBadge.Empty,
                 swapFee = null,
                 feeError = null,
+                isHighNetworkFee = false,
             )
 
             assertThat(result.swapButton.isEnabled).isTrue()
@@ -134,6 +135,7 @@ internal class StateBuilderSwapButtonTest {
                 additionalBadge = ProviderState.AdditionalBadge.Empty,
                 swapFee = null,
                 feeError = null,
+                isHighNetworkFee = false,
             )
 
             assertThat(result.swapButton.isEnabled).isFalse()
@@ -163,6 +165,7 @@ internal class StateBuilderSwapButtonTest {
                 additionalBadge = ProviderState.AdditionalBadge.Empty,
                 swapFee = null,
                 feeError = null,
+                isHighNetworkFee = false,
             )
 
             assertThat(result.swapButton.isEnabled).isFalse()
@@ -187,6 +190,7 @@ internal class StateBuilderSwapButtonTest {
                 additionalBadge = ProviderState.AdditionalBadge.Empty,
                 swapFee = buildSwapFee(),
                 feeError = null,
+                isHighNetworkFee = false,
             )
 
             assertThat(result.swapButton.isEnabled).isTrue()
@@ -215,6 +219,7 @@ internal class StateBuilderSwapButtonTest {
                 additionalBadge = ProviderState.AdditionalBadge.Empty,
                 swapFee = buildSwapFee(),
                 feeError = null,
+                isHighNetworkFee = false,
             )
 
             assertThat(result.swapButton.isEnabled).isFalse()

features/swap/impl/src/test/java/com/tangem/feature/swap/model/SwapModelTestBase.kt

@@ -26,6 +26,7 @@ import com.tangem.domain.models.currency.CryptoCurrencyStatus
 import com.tangem.domain.models.wallet.UserWallet
 import com.tangem.domain.models.wallet.UserWalletId
 import com.tangem.domain.pay.usecase.GetPaymentAccountCryptoCurrencyStatusUseCase
+import com.tangem.domain.quotes.IsHighNetworkFeeUseCase
 import com.tangem.domain.settings.usercountry.GetUserCountryUseCase
 import com.tangem.domain.settings.usercountry.models.UserCountry
 import com.tangem.domain.stories.ShouldShowStoriesUseCase
@@ -103,6 +104,7 @@ internal abstract class SwapModelTestBase {
     protected val getSwapUiModeUseCase: GetSwapUiModeUseCase = mockk(relaxed = true)
     protected val setSwapUiModeUseCase: SetSwapUiModeUseCase = mockk(relaxed = true)
     protected val calculateAmountUseCase: CalculateAmountUseCase = mockk(relaxed = true)
+    protected val isHighNetworkFeeUseCase: IsHighNetworkFeeUseCase = mockk(relaxed = true)
     protected val isWalletBackupProblematicUseCase: IsWalletBackupProblematicUseCase = mockk(relaxed = true)
     protected val sendBackupProblemEmailUseCase: SendBackupProblemEmailUseCase = mockk(relaxed = true)
 
@@ -175,6 +177,7 @@ internal abstract class SwapModelTestBase {
         getSwapUiModeUseCase = getSwapUiModeUseCase,
         setSwapUiModeUseCase = setSwapUiModeUseCase,
         calculateAmountUseCase = calculateAmountUseCase,
+        isHighNetworkFeeUseCase = isHighNetworkFeeUseCase,
         isWalletBackupProblematicUseCase = isWalletBackupProblematicUseCase,
         sendBackupProblemEmailUseCase = sendBackupProblemEmailUseCase,
     )