Updated on 2026-08-14

features/send/impl/src/main/java/com/tangem/features/send/impl/navigation/DefaultSendRouter.kt

@@ -7,6 +7,8 @@ import com.tangem.core.navigation.NavigationAction
 import com.tangem.core.navigation.ReduxNavController
 import com.tangem.domain.tokens.model.CryptoCurrency
 import com.tangem.domain.wallets.models.UserWalletId
+import com.tangem.feature.qrscanning.QrScanningRouter
+import com.tangem.feature.qrscanning.SourceType
 import com.tangem.features.send.impl.presentation.SendFragment
 import com.tangem.features.tokendetails.navigation.TokenDetailsRouter
 
@@ -31,4 +33,16 @@ internal class DefaultSendRouter(
             ),
         )
     }
+
+    override fun openQrCodeScanner(network: String) {
+        reduxNavController.navigate(
+            action = NavigationAction.NavigateTo(
+                screen = AppScreen.QrScanning,
+                bundle = bundleOf(
+                    QrScanningRouter.SOURCE_KEY to SourceType.SEND,
+                    QrScanningRouter.NETWORK_KEY to network,
+                ),
+            ),
+        )
+    }
 }

features/send/impl/src/main/java/com/tangem/features/send/impl/navigation/InnerSendRouter.kt

@@ -11,4 +11,7 @@ interface InnerSendRouter : SendRouter {
 
     /** Open token details screen by [userWalletId] and [currency] */
     fun openTokenDetails(userWalletId: UserWalletId, currency: CryptoCurrency)
+
+    /** Open QR code scanner screen */
+    fun openQrCodeScanner(network: String)
 }

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

@@ -4,16 +4,25 @@ 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.flowWithLifecycle
+import androidx.lifecycle.lifecycleScope
+import arrow.core.getOrElse
 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.feature.qrscanning.SourceType
+import com.tangem.feature.qrscanning.usecase.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
 
@@ -29,6 +38,9 @@ internal class SendFragment : ComposeFragment() {
     @Inject
     lateinit var router: SendRouter
 
+    @Inject
+    lateinit var listenToQrScanningUseCase: ListenToQrScanningUseCase
+
     private val viewModel by viewModels<SendViewModel>()
     private val innerSendRouter: InnerSendRouter
         get() = requireNotNull(router as? InnerSendRouter) {
@@ -44,6 +56,7 @@ internal class SendFragment : ComposeFragment() {
                 fragmentManager = WeakReference(parentFragmentManager),
             ),
         )
+        listenToQrCode()
     }
 
     @Composable
@@ -60,7 +73,24 @@ 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 etAmount error field is not displayed when
+                    // inserting an incorrect amount by shareUri
+                    viewModel.onRecipientAddressScanned(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/state/SendStateFactory.kt

@@ -94,11 +94,14 @@ internal class SendStateFactory(
         currentState = MutableStateFlow(SendUiStateType.Amount),
     )
 
-    fun getReadyState(): SendUiState = currentStateProvider().copy(
-        amountState = amountStateConverter.convert(Unit),
-        recipientState = recipientStateConverter.convert(Unit),
-        feeState = feeStateConverter.convert(Unit),
-    )
+    fun getReadyState(): SendUiState {
+        val state = currentStateProvider()
+        return state.copy(
+            amountState = state.amountState ?: amountStateConverter.convert(Unit),
+            recipientState = state.recipientState ?: recipientStateConverter.convert(Unit),
+            feeState = state.feeState ?: feeStateConverter.convert(Unit),
+        )
+    }
     //endregion
 
     //region amount state clicks
@@ -160,9 +163,8 @@ internal class SendStateFactory(
                 isValidating = false,
                 addressTextField = recipientState.addressTextField.copy(
                     error = when {
-                        !isValidAddress || isAddressInWallet -> resourceReference(
-                            R.string.send_recipient_address_error,
-                        )
+                        !isValidAddress -> resourceReference(R.string.send_recipient_address_error)
+                        isAddressInWallet -> resourceReference(R.string.send_error_address_same_as_wallet)
                         else -> null
                     },
                     isError = value.isNotEmpty() && !isValidAddress || isAddressInWallet,

features/send/impl/src/main/java/com/tangem/features/send/impl/presentation/state/fields/SendAmountFieldChangeConverter.kt

@@ -6,7 +6,6 @@ import com.tangem.features.send.impl.presentation.state.SendUiState
 import com.tangem.utils.Provider
 import com.tangem.utils.converter.Converter
 import java.math.BigDecimal
-import java.text.DecimalFormatSymbols
 import java.text.NumberFormat
 
 internal class SendAmountFieldChangeConverter(
@@ -106,8 +105,7 @@ internal class SendAmountFieldChangeConverter(
         var trimmedValue = this
         if (length > 1 && firstOrNull() == '0' && get(1).isDigit()) trimmedValue = drop(1)
 
-        val separatorChar = DecimalFormatSymbols.getInstance().decimalSeparator.toString()
-        return trimmedValue.replace(TRIM_REGEX.toRegex(), separatorChar)
+        return trimmedValue.replace(TRIM_REGEX.toRegex(), ".")
     }
 
     companion object {

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

@@ -26,14 +26,15 @@ import com.tangem.domain.txhistory.usecase.GetTxHistoryItemsUseCase
 import com.tangem.domain.walletmanager.WalletManagersFacade
 import com.tangem.domain.wallets.models.UserWallet
 import com.tangem.domain.wallets.models.UserWalletId
-import com.tangem.domain.wallets.usecase.GetUserWalletUseCase
-import com.tangem.domain.wallets.usecase.GetWalletsUseCase
-import com.tangem.domain.wallets.usecase.ValidateWalletAddressUseCase
-import com.tangem.domain.wallets.usecase.ValidateWalletMemoUseCase
+import com.tangem.domain.wallets.usecase.*
 import com.tangem.features.send.api.navigation.SendRouter
 import com.tangem.features.send.impl.navigation.InnerSendRouter
 import com.tangem.features.send.impl.presentation.domain.AvailableWallet
 import com.tangem.features.send.impl.presentation.state.*
+import com.tangem.features.send.impl.presentation.state.SendNotificationFactory
+import com.tangem.features.send.impl.presentation.state.SendStateFactory
+import com.tangem.features.send.impl.presentation.state.SendUiState
+import com.tangem.features.send.impl.presentation.state.StateRouter
 import com.tangem.features.send.impl.presentation.state.fee.FeeSelectorState
 import com.tangem.features.send.impl.presentation.state.fee.FeeType
 import com.tangem.features.send.impl.presentation.state.fee.getFee
@@ -67,6 +68,7 @@ internal class SendViewModel @Inject constructor(
     private val sendTransactionUseCase: SendTransactionUseCase,
     private val createTransactionUseCase: CreateTransactionUseCase,
     private val validateWalletAddressUseCase: ValidateWalletAddressUseCase,
+    private val parseSharedAddressUseCase: ParseSharedAddressUseCase,
     private val walletManagersFacade: WalletManagersFacade,
     getExplorerTransactionUrlUseCase: GetExplorerTransactionUrlUseCase,
     validateWalletMemoUseCase: ValidateWalletMemoUseCase,
@@ -116,6 +118,7 @@ internal class SendViewModel @Inject constructor(
     private var feeJobHolder = JobHolder()
     private var addressValidationJobHolder = JobHolder()
     private var sendNotificationsJobHolder = JobHolder()
+    private var qrScannerJobHolder = JobHolder()
 
     override fun onCreate(owner: LifecycleOwner) {
         subscribeOnCurrencyStatusUpdates(owner)
@@ -326,9 +329,7 @@ internal class SendViewModel @Inject constructor(
     override fun onNextClick() = stateRouter.onNextClick()
     override fun onPrevClick() = stateRouter.onPrevClick()
 
-    override fun onQrCodeScanClick() {
-        // TODO Add QR code scanning
-    }
+    override fun onQrCodeScanClick() = innerRouter.openQrCodeScanner(cryptoCurrency.network.name)
 
     override fun onTokenDetailsClick(userWalletId: UserWalletId, currency: CryptoCurrency) =
         innerRouter.openTokenDetails(userWalletId, currency)
@@ -355,6 +356,21 @@ internal class SendViewModel @Inject constructor(
     // endregion
 
     // region recipient state clicks
+    fun onRecipientAddressScanned(address: String) {
+        viewModelScope.launch(dispatchers.main) {
+            parseSharedAddressUseCase(address, cryptoCurrency.network).fold(
+                ifRight = { parsedCode ->
+                    onRecipientAddressValueChange(parsedCode.address)
+                    parsedCode.amount?.let { onAmountValueChange(it.toPlainString()) }
+                    parsedCode.memo?.let { onRecipientMemoValueChange(it) }
+                },
+                ifLeft = {
+                    Timber.w(it)
+                },
+            )
+        }.saveIn(qrScannerJobHolder)
+    }
+
     override fun onRecipientAddressValueChange(value: String) {
         uiState = stateFactory.onRecipientAddressValueChange(value)
         viewModelScope.launch(dispatchers.main) {