Updated on 2026-08-14

features/send/impl/src/main/java/com/tangem/features/send/impl/presentation/SendFragment.kt

@@ -4,27 +4,18 @@ import android.os.Bundle
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.fragment.app.viewModels
-import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
-import androidx.lifecycle.flowWithLifecycle
-import androidx.lifecycle.lifecycleScope
-import arrow.core.getOrElse
 import com.tangem.core.analytics.api.AnalyticsEventHandler
 import com.tangem.core.ui.components.SystemBarsEffect
 import com.tangem.core.ui.res.TangemTheme
 import com.tangem.core.ui.screen.ComposeFragment
 import com.tangem.core.ui.theme.AppThemeModeHolder
-import com.tangem.domain.qrscanning.models.SourceType
-import com.tangem.domain.qrscanning.usecases.ListenToQrScanningUseCase
 import com.tangem.features.send.api.navigation.SendRouter
 import com.tangem.features.send.impl.navigation.InnerSendRouter
 import com.tangem.features.send.impl.presentation.state.StateRouter
 import com.tangem.features.send.impl.presentation.ui.SendScreen
 import com.tangem.features.send.impl.presentation.viewmodel.SendViewModel
 import dagger.hilt.android.AndroidEntryPoint
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.flow.emptyFlow
-import kotlinx.coroutines.launch
 import java.lang.ref.WeakReference
 import javax.inject.Inject
 
@@ -40,9 +31,6 @@ internal class SendFragment : ComposeFragment() {
     @Inject
     lateinit var router: SendRouter
 
-    @Inject
-    lateinit var listenToQrScanningUseCase: ListenToQrScanningUseCase
-
     @Inject
     lateinit var analyticsEventsHandler: AnalyticsEventHandler
 
@@ -65,7 +53,6 @@ internal class SendFragment : ComposeFragment() {
                 analyticsEventsHandler = analyticsEventsHandler,
             ),
         )
-        listenToQrCode()
     }
 
     @Composable
@@ -83,25 +70,7 @@ internal class SendFragment : ComposeFragment() {
         super.onDestroy()
     }
 
-    private fun listenToQrCode() {
-        lifecycleScope.launch {
-            listenToQrScanningUseCase(SourceType.SEND)
-                .getOrElse { emptyFlow() }
-                .flowWithLifecycle(this@SendFragment.lifecycle, minActiveState = Lifecycle.State.CREATED)
-                .collect {
-                    delay(QR_SCAN_DELAY)
-
-                    // Delayed launch is needed in order for the UI to be drawn and to process the sent events.
-                    // If do not use the delay, then error field is not displayed when
-                    // inserting an incorrect amount by shareUri
-                    viewModel.onQrCodeScanned(it)
-                }
-        }
-    }
-
     companion object {
-        private const val QR_SCAN_DELAY = 200L
-
         /** Create send fragment instance */
         fun create(): SendFragment = SendFragment()
     }

features/send/impl/src/main/java/com/tangem/features/send/impl/presentation/viewmodel/SendViewModel.kt

@@ -15,6 +15,8 @@ import com.tangem.domain.appcurrency.GetSelectedAppCurrencyUseCase
 import com.tangem.domain.appcurrency.model.AppCurrency
 import com.tangem.domain.balancehiding.GetBalanceHidingSettingsUseCase
 import com.tangem.domain.common.util.cardTypesResolver
+import com.tangem.domain.qrscanning.models.SourceType
+import com.tangem.domain.qrscanning.usecases.ListenToQrScanningUseCase
 import com.tangem.domain.qrscanning.usecases.ParseQrCodeUseCase
 import com.tangem.domain.redux.LegacyAction
 import com.tangem.domain.redux.ReduxStateHolder
@@ -92,6 +94,7 @@ internal class SendViewModel @Inject constructor(
     private val isSendTapHelpEnabledUseCase: IsSendTapHelpEnabledUseCase,
     private val neverShowTapHelpUseCase: NeverShowTapHelpUseCase,
     private val getExplorerTransactionUrlUseCase: GetExplorerTransactionUrlUseCase,
+    private val listenToQrScanningUseCase: ListenToQrScanningUseCase,
     currencyChecksRepository: CurrencyChecksRepository,
     isFeeApproximateUseCase: IsFeeApproximateUseCase,
     validateWalletMemoUseCase: ValidateWalletMemoUseCase,
@@ -189,11 +192,11 @@ internal class SendViewModel @Inject constructor(
     private var memoValidationJobHolder = JobHolder()
     private var sendNotificationsJobHolder = JobHolder()
     private var feeNotificationsJobHolder = JobHolder()
-    private var qrScannerJobHolder = JobHolder()
 
     private var sendIdleTimer = 0L
 
     init {
+        subscribeOnQRScannerResult()
         subscribeOnCurrencyStatusUpdates()
         subscribeOnBalanceHidden()
         getTapHelpPreviewAvailability()
@@ -215,6 +218,13 @@ internal class SendViewModel @Inject constructor(
         this.stateRouter = stateRouter
     }
 
+    private fun subscribeOnQRScannerResult() {
+        listenToQrScanningUseCase(SourceType.SEND)
+            .getOrElse { emptyFlow() }
+            .onEach(::onQrCodeScanned)
+            .launchIn(viewModelScope)
+    }
+
     private fun subscribeOnCurrencyStatusUpdates() {
         viewModelScope.launch(dispatchers.main) {
             getUserWalletUseCase(userWalletId).fold(
@@ -536,6 +546,23 @@ internal class SendViewModel @Inject constructor(
             feeJobHolder.cancel()
         }
     }
+
+    private fun onQrCodeScanned(address: String) {
+        parseQrCodeUseCase(address, cryptoCurrency).fold(
+            ifRight = { parsedCode ->
+                onRecipientAddressValueChange(parsedCode.address, EnterAddressSource.QRCode)
+                parsedCode.amount?.let {
+                    onAmountValueChange(it.parseBigDecimal(decimals = cryptoCurrency.decimals))
+                }
+                parsedCode.memo?.let { onRecipientMemoValueChange(it) }
+            },
+            ifLeft = {
+                onRecipientAddressValueChange(address, EnterAddressSource.QRCode)
+                Timber.w(it)
+            },
+        )
+    }
+
     // endregion
 
     // region amount state clicks
@@ -555,26 +582,9 @@ internal class SendViewModel @Inject constructor(
     override fun onAmountPasteTriggerDismiss() {
         uiState = amountStateFactory.getOnAmountPastedTriggerDismiss()
     }
-    // endregion
+// endregion
 
-    // region recipient state clicks
-    fun onQrCodeScanned(address: String) {
-        viewModelScope.launch(dispatchers.main) {
-            parseQrCodeUseCase(address, cryptoCurrency).fold(
-                ifRight = { parsedCode ->
-                    onRecipientAddressValueChange(parsedCode.address, EnterAddressSource.QRCode)
-                    parsedCode.amount?.let {
-                        onAmountValueChange(it.parseBigDecimal(decimals = cryptoCurrency.decimals))
-                    }
-                    parsedCode.memo?.let { onRecipientMemoValueChange(it) }
-                },
-                ifLeft = {
-                    onRecipientAddressValueChange(address, EnterAddressSource.QRCode)
-                    Timber.w(it)
-                },
-            )
-        }.saveIn(qrScannerJobHolder)
-    }
+// region recipient state clicks
 
     override fun onRecipientAddressValueChange(value: String, type: EnterAddressSource?) {
         viewModelScope.launch {
@@ -633,7 +643,7 @@ internal class SendViewModel @Inject constructor(
         val isRecent = type == EnterAddressSource.RecentAddress
         if (isRecent && isValidAddress) onNextClick()
     }
-    // endregion
+// endregion
 
     // region fee
     override fun feeReload() = loadFee()
@@ -709,7 +719,7 @@ internal class SendViewModel @Inject constructor(
             cryptoCurrency = cryptoCurrency,
         )
     }
-    // endregion
+// endregion
 
     // region send state clicks
     override fun onSendClick() {
@@ -894,7 +904,7 @@ internal class SendViewModel @Inject constructor(
         }
         uiState = stateFactory.getHiddenTapHelpState()
     }
-    // endregion
+// endregion
 
     private companion object {
         const val CHECK_FEE_UPDATE_DELAY = 60_000L