Updated on 2026-08-14

features/swap/domain/src/main/java/com/tangem/feature/swap/domain/SwapInteractorImpl.kt

@@ -1648,7 +1648,14 @@ internal class SwapInteractorImpl @AssistedInject constructor(
                         }
                     }
                 } else {
-                    IncludeFeeInAmount.Excluded
+                    val fee = txFeeSealedState.txFee.fee.amount.value ?: BigDecimal.ZERO
+                    getIncludeFeeInAmountForNative(
+                        networkId = networkId,
+                        amount = amount,
+                        reduceBalanceBy = reduceBalanceBy,
+                        fromToken = fromToken.currency,
+                        feeValue = fee,
+                    )
                 }
             }
             is TxFeeSealedState.Legacy -> {

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

@@ -2194,9 +2194,14 @@ internal class SwapModel @Inject constructor(
             state.value = newState
 
             // If fee currency is same as from currency, we need to reload quotes to update fee info
-            if (newState is FeeSelectorUM.Content &&
+            val isFeeCurrencySameAsFromCurrency = newState is FeeSelectorUM.Content &&
                 dataState.fromCryptoCurrency?.currency?.id == newState.feeExtraInfo.feeCryptoCurrencyStatus.currency.id
-            ) {
+
+            // If fee currency is coin, we need to reload quotes to update fee related warnings (e.g. insufficient funds)
+            val isCoinFeeSelected = newState is FeeSelectorUM.Content &&
+                newState.feeExtraInfo.feeCryptoCurrencyStatus.currency is CryptoCurrency.Coin
+
+            if (isFeeCurrencySameAsFromCurrency || isCoinFeeSelected) {
                 // block swap button until fee is loaded
                 uiState = uiState.copy(
                     swapButton = uiState.swapButton.copy(

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

@@ -298,9 +298,12 @@ internal class SwapNotificationsFactory(
             quoteModel.permissionState !is PermissionDataState.PermissionLoading &&
             feeEnoughState.feeCurrency != fromToken
 
+        val isNotEnoughFee =
+            quoteModel.preparedSwapConfigState.includeFeeInAmount is IncludeFeeInAmount.BalanceNotEnough
+
         val isGaslessAvailable = iGaslessFeeSupportedForNetwork(fromToken.network) &&
             quoteModel.swapProvider.type == ExchangeProviderType.CEX
-        if (shouldShowCoverWarning && !isGaslessAvailable) {
+        if (shouldShowCoverWarning && !isGaslessAvailable || isNotEnoughFee) {
             add(
                 SwapNotificationUM.Error.UnableToCoverFeeWarning(
                     fromToken = fromToken,