Updated on 2026-08-14

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

@@ -16,6 +16,18 @@ import dagger.hilt.android.scopes.ViewModelScoped
 @Suppress("TooManyFunctions")
 internal object TokensDomainModule {
 
+    @Provides
+    @ViewModelScoped
+    fun provideAddCryptoCurrenciesUseCase(
+        currenciesRepository: CurrenciesRepository,
+        networksRepository: NetworksRepository,
+    ): AddCryptoCurrenciesUseCase {
+        return AddCryptoCurrenciesUseCase(
+            currenciesRepository = currenciesRepository,
+            networksRepository = networksRepository,
+        )
+    }
+
     @Provides
     @ViewModelScoped
     fun provideFetchTokenListUseCase(

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/ManageTokensFragment.kt

@@ -2,11 +2,15 @@ package com.tangem.managetokens
 
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalLifecycleOwner
+import androidx.hilt.navigation.compose.hiltViewModel
 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.features.managetokens.navigation.ManageTokensRouter
+import com.tangem.managetokens.presentation.managetokens.ui.ManageTokensScreen
+import com.tangem.managetokens.presentation.managetokens.viewmodels.ManageTokensViewModel
 import dagger.hilt.android.AndroidEntryPoint
 import javax.inject.Inject
 
@@ -26,16 +30,16 @@ internal class ManageTokensFragment : ComposeFragment() {
 
     @Composable
     override fun ScreenContent(modifier: Modifier) {
-        // val viewModel = hiltViewModel<ManageTokensViewModel>()
+        val viewModel = hiltViewModel<ManageTokensViewModel>()
         // viewModel.router = [REDACTED_EMAIL]
         //
-        // LocalLifecycleOwner.current.lifecycle.addObserver(viewModel)
+        LocalLifecycleOwner.current.lifecycle.addObserver(viewModel)
 
         val systemBarsColor = TangemTheme.colors.background.secondary
         SystemBarsEffect {
             setSystemBarsColor(systemBarsColor)
         }
 
-        // ManageTokensScreen(state = viewModel.uiState)
+        ManageTokensScreen(state = viewModel.uiState)
     }
 }

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/common/state/AlertState.kt

@@ -25,18 +25,21 @@ internal sealed class AlertState {
         override val message: TextReference = resourceReference(R.string.manage_tokens_network_selector_non_native_info)
     }
 
-    object TokensUnsupported : AlertState() {
+    class TokensUnsupported(networkName: String) : AlertState() {
-        override val message: TextReference = resourceReference(R.string.alert_manage_tokens_unsupported_message)
+        override val message: TextReference = resourceReference(
+            id = R.string.alert_manage_tokens_unsupported_message,
+            formatArgs = wrappedList(networkName),
+        )
     }
 
     object TokensUnsupportedCurve : AlertState() {
         override val message: TextReference = resourceReference(R.string.alert_manage_tokens_unsupported_curve_message)
     }
 
-    class TokensUnsupportedBlockchainByCard(val token: String) : AlertState() {
+    class TokensUnsupportedBlockchainByCard(networkName: String) : AlertState() {
         override val message: TextReference = resourceReference(
             id = R.string.alert_manage_tokens_unsupported_blockchain_by_card_message,
-            formatArgs = wrappedList(token),
+            formatArgs = wrappedList(networkName),
         )
     }
 }

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/common/ui/ChooseWalletScreen.kt

@@ -33,7 +33,11 @@ internal fun ChooseWalletScreen(state: ChooseWalletState.Choose, modifier: Modif
     LazyColumn(
         modifier = modifier
             .background(TangemTheme.colors.background.tertiary)
-            .padding(TangemTheme.dimens.spacing16),
+            .padding(
+                start = TangemTheme.dimens.spacing16,
+                end = TangemTheme.dimens.spacing16,
+                bottom = TangemTheme.dimens.spacing16,
+            ),
     ) {
         item {
             Box(
@@ -101,13 +105,13 @@ private fun WalletItem(wallet: WalletState, selectedWallet: WalletState?, modifi
                 .build(),
             loading = {
                 Image(
-                    painter = painterResource(R.drawable.card_placeholder_primary),
+                    painter = painterResource(R.drawable.card_placeholder_black),
                     contentDescription = null,
                 )
             },
             error = {
                 Image(
-                    painter = painterResource(R.drawable.card_placeholder_primary),
+                    painter = painterResource(R.drawable.card_placeholder_black),
                     contentDescription = null,
                 )
             },

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/common/ui/components/Alert.kt

@@ -14,7 +14,7 @@ internal fun Alert(state: AlertState, onDismiss: () -> Unit) {
         is AlertState.DefaultAlert,
         is AlertState.NonNative,
         AlertState.TokensUnsupportedCurve,
-        AlertState.TokensUnsupported,
+        is AlertState.TokensUnsupported,
         is AlertState.TokensUnsupportedBlockchainByCard,
         -> DefaultAlert(state, onDismiss)
         is AlertState.TokenUnavailable -> TokenUnavailableAlert(state, onDismiss)

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/state/factory/ManageTokensStateFactory.kt

@@ -0,0 +1,118 @@
+package com.tangem.managetokens.presentation.managetokens.state.factory
+
+import androidx.paging.PagingData
+import com.tangem.core.ui.event.consumedEvent
+import com.tangem.core.ui.event.triggeredEvent
+import com.tangem.domain.wallets.models.UserWallet
+import com.tangem.managetokens.presentation.common.state.ChooseWalletState
+import com.tangem.managetokens.presentation.common.state.ChooseWalletWarning
+import com.tangem.managetokens.presentation.common.state.Event
+import com.tangem.managetokens.presentation.common.state.WalletState
+import com.tangem.managetokens.presentation.managetokens.state.AddCustomTokenButton
+import com.tangem.managetokens.presentation.managetokens.state.ManageTokensState
+import com.tangem.managetokens.presentation.managetokens.state.SearchBarState
+import com.tangem.managetokens.presentation.managetokens.state.TokenItemState
+import com.tangem.managetokens.presentation.managetokens.viewmodels.ManageTokensClickIntents
+import com.tangem.utils.Provider
+import kotlinx.collections.immutable.toPersistentList
+import kotlinx.coroutines.flow.Flow
+
+internal class ManageTokensStateFactory(
+    private val currentStateProvider: Provider<ManageTokensState>,
+    private val clickIntents: ManageTokensClickIntents,
+) {
+
+    fun getInitialState(tokens: Flow<PagingData<TokenItemState>>): ManageTokensState {
+        return ManageTokensState(
+            searchBarState = SearchBarState(
+                query = "",
+                onQueryChange = clickIntents::onSearchQueryChange,
+                active = false,
+                onActiveChange = clickIntents::onSearchActiveChange,
+            ),
+            tokens = tokens,
+            addCustomTokenButton = AddCustomTokenButton(
+                isVisible = false,
+                onClick = clickIntents::onAddCustomTokensButtonClick,
+            ),
+            derivationNotification = null,
+            isLoading = false,
+            event = consumedEvent(),
+            chooseWalletState = ChooseWalletState.NoSelection,
+        )
+    }
+
+    fun updateChooseWalletState(
+        wallets: List<UserWallet>,
+        userWallets: List<UserWallet>,
+        selectedWallet: UserWallet?,
+    ): ManageTokensState {
+        val chooseWalletState = when {
+            wallets.size == 1 -> {
+                ChooseWalletState.NoSelection
+            }
+            wallets.isEmpty() && userWallets.all { !it.isMultiCurrency } -> {
+                ChooseWalletState.Warning(ChooseWalletWarning.SINGLE_CURRENCY)
+            }
+            else -> {
+                var selectedWalletState: WalletState? = null
+                ChooseWalletState.Choose(
+                    wallets = wallets.map { wallet ->
+                        val walletState = WalletState(
+                            walletId = wallet.walletId.stringValue,
+                            artworkUrl = wallet.artworkUrl,
+                            onSelected = clickIntents::onWalletSelected,
+                            walletName = wallet.name,
+                        )
+                        if (wallet.walletId.stringValue == selectedWallet?.walletId?.stringValue) {
+                            selectedWalletState = walletState
+                        }
+                        walletState
+                    }.toPersistentList(),
+                    selectedWallet = selectedWalletState,
+                    onChooseWalletClick = clickIntents::onChooseWalletClick,
+                    onCloseChoosingWalletClick = clickIntents::onCloseChoosingWalletClick,
+                )
+            }
+        }
+        return currentStateProvider().copy(chooseWalletState = chooseWalletState)
+    }
+
+    fun showAddCustomTokensButton(show: Boolean): ManageTokensState {
+        return currentStateProvider().copy(
+            addCustomTokenButton = currentStateProvider().addCustomTokenButton.copy(isVisible = show),
+        )
+    }
+
+    fun updateSelectedWallet(selectedWalletId: String?): ManageTokensState {
+        val chooseWalletState = currentStateProvider().chooseWalletState
+        return currentStateProvider().copy(
+            showChooseWalletScreen = false,
+            chooseWalletState = if (chooseWalletState is ChooseWalletState.Choose) {
+                chooseWalletState.copy(
+                    selectedWallet = chooseWalletState.wallets.find {
+                        it.walletId == selectedWalletId
+                    } ?: chooseWalletState.wallets.first(),
+                )
+            } else {
+                chooseWalletState
+            },
+        )
+    }
+
+    fun getStateAndTriggerEvent(
+        state: ManageTokensState,
+        event: Event,
+        setUiState: (ManageTokensState) -> Unit,
+    ): ManageTokensState {
+        return state.copy(
+            event = triggeredEvent(
+                data = event,
+                onConsume = {
+                    val currentState = currentStateProvider()
+                    setUiState(currentState.copy(event = consumedEvent()))
+                },
+            ),
+        )
+    }
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/state/factory/NetworkToNetworkItemStateConverter.kt

@@ -0,0 +1,74 @@
+package com.tangem.managetokens.presentation.managetokens.state.factory
+
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import com.tangem.blockchain.common.Blockchain
+import com.tangem.core.ui.extensions.getActiveIconRes
+import com.tangem.core.ui.extensions.getGreyedOutIconRes
+import com.tangem.domain.common.extensions.fromNetworkId
+import com.tangem.domain.tokens.model.CryptoCurrency
+import com.tangem.domain.tokens.model.Token
+import com.tangem.domain.wallets.models.UserWallet
+import com.tangem.managetokens.presentation.common.state.NetworkItemState
+import com.tangem.managetokens.presentation.managetokens.state.TokenItemState
+import com.tangem.utils.Provider
+import com.tangem.utils.converter.Converter
+
+internal class NetworkToNetworkItemStateConverter(
+    private val addedCurrenciesByWalletProvider: Provider<MutableMap<UserWallet, MutableList<CryptoCurrency>>>,
+    private val selectedWalletProvider: Provider<UserWallet?>,
+    private val onNetworkToggleClick: (token: TokenItemState.Loaded, network: NetworkItemState.Toggleable) -> Unit,
+) : Converter<Token.Network, NetworkItemState> {
+
+    override fun convert(value: Token.Network): NetworkItemState {
+        return createManageNetworkContent(value)
+    }
+
+    private fun createManageNetworkContent(network: Token.Network): NetworkItemState {
+        val addedCurrencies = addedCurrenciesByWalletProvider()[selectedWalletProvider()] ?: emptyList()
+        val blockchain = requireNotNull(Blockchain.fromNetworkId(network.networkId)) {
+            "Network ID must be valid"
+        }
+        val isAdded = isAdded(
+            address = network.address,
+            blockchain = blockchain,
+            currencies = addedCurrencies,
+        )
+        return NetworkItemState.Toggleable(
+            name = blockchain.fullName.uppercase(),
+            iconResId = mutableIntStateOf(
+                getNetworkIconResId(isAdded, blockchain.id),
+            ),
+            isMainNetwork = isMainNetwork(network),
+            isAdded = mutableStateOf(isAdded),
+            id = network.networkId,
+            protocolName = network.standardType,
+            address = network.address,
+            decimals = network.decimalCount,
+            blockchain = blockchain,
+            onToggleClick = onNetworkToggleClick,
+        )
+    }
+
+    private fun getNetworkIconResId(isAdded: Boolean, blockchainId: String): Int {
+        return if (isAdded) {
+            getActiveIconRes(blockchainId)
+        } else {
+            getGreyedOutIconRes(blockchainId)
+        }
+    }
+
+    private fun isMainNetwork(network: Token.Network) = network.address == null
+
+    private fun isAdded(address: String?, blockchain: Blockchain, currencies: Collection<CryptoCurrency>): Boolean {
+        return if (address != null) {
+            currencies.any {
+                !it.isCustom && it is CryptoCurrency.Token && it.contractAddress == address
+            }
+        } else {
+            currencies.any {
+                !it.isCustom && it is CryptoCurrency.Coin && it.name == blockchain.fullName
+            }
+        }
+    }
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/state/factory/NetworksToChooseNetworkStateConverter.kt

@@ -0,0 +1,36 @@
+package com.tangem.managetokens.presentation.managetokens.state.factory
+
+import com.tangem.domain.tokens.model.Token
+import com.tangem.managetokens.presentation.common.state.NetworkItemState
+import com.tangem.managetokens.presentation.managetokens.state.ChooseNetworkState
+import com.tangem.utils.converter.Converter
+import kotlinx.collections.immutable.toPersistentList
+
+internal class NetworksToChooseNetworkStateConverter(
+    private val networkToNetworkItemStateConverter: NetworkToNetworkItemStateConverter,
+    private val onNonNativeNetworkHintClick: () -> Unit,
+    private val onCloseChooseNetworkScreen: () -> Unit,
+) : Converter<List<Token.Network>, ChooseNetworkState> {
+
+    override fun convert(value: List<Token.Network>): ChooseNetworkState {
+        return createChooseNetworksState(value)
+    }
+
+    private fun createChooseNetworksState(networks: List<Token.Network>): ChooseNetworkState {
+        val nativeNetworks = mutableListOf<NetworkItemState>()
+        val nonNativeNetworks = mutableListOf<NetworkItemState>()
+        networks.map { networkToNetworkItemStateConverter.convert(it) }.forEach {
+            if (it is NetworkItemState.Toggleable && it.isMainNetwork) {
+                nativeNetworks.add(it)
+            } else {
+                nonNativeNetworks.add(it)
+            }
+        }
+        return ChooseNetworkState(
+            nativeNetworks = nativeNetworks.toPersistentList(),
+            nonNativeNetworks = nonNativeNetworks.toPersistentList(),
+            onNonNativeNetworkHintClick = onNonNativeNetworkHintClick,
+            onCloseChooseNetworkScreen = onCloseChooseNetworkScreen,
+        )
+    }
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/state/factory/QuotesToQuotesStateConverter.kt

@@ -0,0 +1,34 @@
+package com.tangem.managetokens.presentation.managetokens.state.factory
+
+import com.tangem.core.ui.utils.BigDecimalFormatter
+import com.tangem.domain.tokens.model.Quote
+import com.tangem.managetokens.presentation.managetokens.state.PriceChangeType
+import com.tangem.managetokens.presentation.managetokens.state.QuotesState
+import com.tangem.utils.converter.Converter
+import kotlinx.collections.immutable.persistentListOf
+import java.math.BigDecimal
+
+@Suppress("MagicNumber") // TODO: remove when chart data is added (in [REDACTED_TASK_KEY] when endpoint is ready)
+internal class QuotesToQuotesStateConverter : Converter<Quote, QuotesState> {
+    override fun convert(value: Quote): QuotesState {
+        val priceChange = value.priceChange
+        return QuotesState.Content(
+            priceChange = BigDecimalFormatter.formatPercent(
+                percent = priceChange.movePointLeft(2),
+                useAbsoluteValue = true,
+                maxFractionDigits = 1,
+                minFractionDigits = 1,
+            ),
+            changeType = priceChange.getPriceChangeType(),
+            chartData = // TODO (in [REDACTED_TASK_KEY] when endpoint is ready)
+            when (priceChange.getPriceChangeType()) {
+                PriceChangeType.UP -> persistentListOf(0f, 5f, 10f, 30f)
+                PriceChangeType.DOWN -> persistentListOf(15f, 12f, 13f, 18f, 10f, 3f)
+            },
+        )
+    }
+
+    private fun BigDecimal.getPriceChangeType(): PriceChangeType {
+        return if (this >= BigDecimal.ZERO) PriceChangeType.UP else PriceChangeType.DOWN
+    }
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/state/factory/TokenConverter.kt

@@ -0,0 +1,80 @@
+package com.tangem.managetokens.presentation.managetokens.state.factory
+
+import androidx.compose.runtime.mutableStateOf
+import com.tangem.blockchain.common.Blockchain
+import com.tangem.core.ui.extensions.ImageReference
+import com.tangem.core.ui.extensions.getTintForTokenIcon
+import com.tangem.core.ui.extensions.tryGetBackgroundForTokenIcon
+import com.tangem.core.ui.utils.BigDecimalFormatter
+import com.tangem.domain.appcurrency.model.AppCurrency
+import com.tangem.domain.common.extensions.fromNetworkId
+import com.tangem.domain.tokens.model.CryptoCurrency
+import com.tangem.domain.tokens.model.Token
+import com.tangem.managetokens.presentation.managetokens.state.QuotesState
+import com.tangem.managetokens.presentation.managetokens.state.TokenButtonType
+import com.tangem.managetokens.presentation.managetokens.state.TokenIconState
+import com.tangem.managetokens.presentation.managetokens.state.TokenItemState
+import com.tangem.utils.Provider
+import com.tangem.utils.converter.Converter
+
+internal class TokenConverter(
+    private val quotesStateConverter: QuotesToQuotesStateConverter,
+    private val networksToChooseNetworkStateConverter: NetworksToChooseNetworkStateConverter,
+    private val allAddedCurrencies: Provider<List<CryptoCurrency>>,
+    private val selectedAppCurrency: Provider<AppCurrency>,
+    private val onTokenItemButtonClick: (TokenItemState.Loaded) -> Unit,
+) : Converter<Token, TokenItemState.Loaded> {
+
+    override fun convert(value: Token): TokenItemState.Loaded {
+        val isAnyAdded = value.networks.any { network ->
+            isAdded(
+                address = network.address,
+                blockchain = requireNotNull(Blockchain.fromNetworkId(network.networkId)),
+                currencies = allAddedCurrencies(),
+            )
+        }
+        val buttonType = when {
+            value.isAvailable && isAnyAdded -> TokenButtonType.EDIT
+            value.isAvailable && !isAnyAdded -> TokenButtonType.ADD
+            else -> TokenButtonType.NOT_AVAILABLE
+        }
+
+        val background = tryGetBackgroundForTokenIcon(value.networks.firstOrNull()?.address ?: "")
+        val tint = getTintForTokenIcon(background)
+
+        return TokenItemState.Loaded(
+            id = value.id,
+            name = value.name,
+            currencySymbol = value.symbol,
+            tokenId = value.id,
+            tokenIcon = TokenIconState(
+                ImageReference.Url(value.iconUrl),
+                placeholderBackground = background,
+                placeholderTint = tint,
+            ),
+            quotes = value.quote?.let { quotesStateConverter.convert(it) } ?: QuotesState.Unknown,
+            rate = value.quote?.fiatRate?.let { rate ->
+                BigDecimalFormatter.formatFiatAmount(
+                    fiatAmount = rate,
+                    fiatCurrencyCode = selectedAppCurrency().code,
+                    fiatCurrencySymbol = selectedAppCurrency().symbol,
+                )
+            },
+            availableAction = mutableStateOf(buttonType),
+            chooseNetworkState = networksToChooseNetworkStateConverter.convert(value.networks),
+            onButtonClick = onTokenItemButtonClick,
+        )
+    }
+
+    private fun isAdded(address: String?, blockchain: Blockchain, currencies: Collection<CryptoCurrency>): Boolean {
+        return if (address != null) {
+            currencies.any {
+                !it.isCustom && it is CryptoCurrency.Token && it.contractAddress == address
+            }
+        } else {
+            currencies.any {
+                !it.isCustom && it is CryptoCurrency.Coin && it.name == blockchain.fullName
+            }
+        }
+    }
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/state/factory/TokenToCryptoCurrencyConverter.kt

@@ -0,0 +1,45 @@
+package com.tangem.managetokens.presentation.managetokens.state.factory
+
+import com.tangem.blockchain.common.Blockchain
+import com.tangem.data.tokens.utils.CryptoCurrencyFactory
+import com.tangem.domain.common.DerivationStyleProvider
+import com.tangem.domain.common.extensions.fromNetworkId
+import com.tangem.domain.tokens.model.CryptoCurrency
+import com.tangem.managetokens.presentation.common.state.NetworkItemState
+import com.tangem.managetokens.presentation.managetokens.state.TokenItemState
+import com.tangem.utils.converter.Converter
+
+internal class TokenToCryptoCurrencyConverter(
+    private val network: NetworkItemState,
+    private val derivationStyleProvider: DerivationStyleProvider,
+) : Converter<TokenItemState.Loaded, CryptoCurrency?> {
+
+    override fun convert(value: TokenItemState.Loaded): CryptoCurrency? {
+        val blockchain = requireNotNull(Blockchain.fromNetworkId(network.id))
+        val sdkToken = if (network is NetworkItemState.Toggleable && network.address != null) {
+            com.tangem.blockchain.common.Token(
+                symbol = value.currencySymbol,
+                name = value.name,
+                contractAddress = network.address,
+                decimals = network.decimals!!,
+                id = value.tokenId,
+            )
+        } else {
+            null
+        }
+        return if (sdkToken != null) {
+            CryptoCurrencyFactory().createToken(
+                sdkToken = sdkToken,
+                blockchain = blockchain,
+                derivationStyleProvider = derivationStyleProvider,
+                extraDerivationPath = null,
+            )
+        } else {
+            CryptoCurrencyFactory().createCoin(
+                blockchain = blockchain,
+                derivationStyleProvider = derivationStyleProvider,
+                extraDerivationPath = null,
+            )
+        }
+    }
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/ui/ChooseNetworkScreen.kt

@@ -35,9 +35,13 @@ internal fun ChooseNetworkScreen(
 ) {
     val networkState = state.chooseNetworkState
     LazyColumn(
+        contentPadding = PaddingValues(
+            start = TangemTheme.dimens.spacing16,
+            end = TangemTheme.dimens.spacing16,
+            bottom = TangemTheme.dimens.spacing16,
+        ),
         modifier = modifier
-            .background(TangemTheme.colors.background.tertiary)
+            .background(TangemTheme.colors.background.tertiary),
-            .padding(TangemTheme.dimens.spacing16),
     ) {
         item {
             Text(

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/ui/components/TokensList.kt

@@ -40,7 +40,11 @@ internal fun TokensList(tokens: LazyPagingItems<TokenItemState>, addCustomTokenB
                         text = stringResource(id = R.string.manage_tokens_nothing_found),
                         style = TangemTheme.typography.caption2,
                         color = TangemTheme.colors.text.tertiary,
-                        modifier = Modifier.padding(horizontal = TangemTheme.dimens.spacing16),
+                        modifier = Modifier.padding(
+                            top = TangemTheme.dimens.spacing8,
+                            start = TangemTheme.dimens.spacing16,
+                            end = TangemTheme.dimens.spacing16,
+                        ),
                     )
                 }
             }

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/viewmodels/ManageTokensClickIntents.kt

@@ -0,0 +1,30 @@
+package com.tangem.managetokens.presentation.managetokens.viewmodels
+
+import com.tangem.managetokens.presentation.common.state.NetworkItemState
+import com.tangem.managetokens.presentation.managetokens.state.TokenItemState
+
+internal interface ManageTokensClickIntents {
+    fun onAddCustomTokensButtonClick()
+
+    fun onSearchQueryChange(query: String)
+    fun onSearchActiveChange(active: Boolean)
+
+    fun onTokenItemButtonClick(token: TokenItemState.Loaded)
+
+    fun onGenerateDerivationClick()
+
+    fun onBackClick()
+
+    fun onCloseChooseNetworkScreen()
+
+    fun onNetworkToggleClick(token: TokenItemState.Loaded, network: NetworkItemState.Toggleable)
+    fun onNonNativeNetworkHintClick()
+
+    fun onSelectWalletsClick()
+
+    fun onChooseWalletClick()
+
+    fun onCloseChoosingWalletClick()
+
+    fun onWalletSelected(walletId: String)
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/viewmodels/ManageTokensViewModel.kt

@@ -0,0 +1,393 @@
+package com.tangem.managetokens.presentation.managetokens.viewmodels
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.paging.PagingData
+import androidx.paging.map
+import arrow.core.getOrElse
+import com.tangem.blockchain.common.Blockchain
+import com.tangem.domain.appcurrency.GetSelectedAppCurrencyUseCase
+import com.tangem.domain.appcurrency.model.AppCurrency
+import com.tangem.domain.card.DerivePublicKeysUseCase
+import com.tangem.domain.common.util.derivationStyleProvider
+import com.tangem.domain.tokens.*
+import com.tangem.domain.tokens.model.CryptoCurrency
+import com.tangem.domain.wallets.models.UserWallet
+import com.tangem.domain.wallets.models.UserWalletId
+import com.tangem.domain.wallets.usecase.GetSelectedWalletSyncUseCase
+import com.tangem.domain.wallets.usecase.GetWalletsUseCase
+import com.tangem.domain.wallets.usecase.SelectWalletUseCase
+import com.tangem.domain.wallets.usecase.UpdateWalletUseCase
+import com.tangem.managetokens.presentation.common.state.AlertState
+import com.tangem.managetokens.presentation.common.state.Event
+import com.tangem.managetokens.presentation.common.state.NetworkItemState
+import com.tangem.managetokens.presentation.managetokens.state.DerivationNotificationState
+import com.tangem.managetokens.presentation.managetokens.state.ManageTokensState
+import com.tangem.managetokens.presentation.managetokens.state.TokenButtonType
+import com.tangem.managetokens.presentation.managetokens.state.TokenItemState
+import com.tangem.managetokens.presentation.managetokens.state.factory.*
+import com.tangem.operations.derivation.ExtendedPublicKeysMap
+import com.tangem.utils.Provider
+import com.tangem.utils.coroutines.CoroutineDispatcherProvider
+import com.tangem.utils.coroutines.Debouncer
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.plus
+import kotlinx.coroutines.withContext
+import javax.inject.Inject
+import kotlin.collections.set
+import kotlin.properties.Delegates
+
+@Suppress("LargeClass", "LongParameterList", "TooManyFunctions")
+@HiltViewModel
+internal class ManageTokensViewModel @Inject constructor(
+    private val dispatchers: CoroutineDispatcherProvider,
+    private val getGlobalTokenListUseCase: GetGlobalTokenListUseCase,
+    private val getWalletsUseCase: GetWalletsUseCase,
+    private val getSelectedWalletSyncUseCase: GetSelectedWalletSyncUseCase,
+    private val removeCurrencyUseCase: RemoveCurrencyUseCase,
+    private val addCryptoCurrenciesUseCase: AddCryptoCurrenciesUseCase,
+    private val selectWalletUseCase: SelectWalletUseCase,
+    private val getCurrenciesUseCase: GetCryptoCurrenciesUseCase,
+    private val derivePublicKeysUseCase: DerivePublicKeysUseCase,
+    private val updateWalletUseCase: UpdateWalletUseCase,
+    private val fetchTokenListUseCase: FetchTokenListUseCase,
+    private val getSelectedAppCurrencyUseCase: GetSelectedAppCurrencyUseCase,
+) : ViewModel(), ManageTokensClickIntents, DefaultLifecycleObserver {
+
+    private val debouncer = Debouncer()
+
+    private val stateFactory = ManageTokensStateFactory(
+        currentStateProvider = Provider { uiState },
+        clickIntents = this,
+    )
+
+    var uiState: ManageTokensState by mutableStateOf(stateFactory.getInitialState(flowOf(PagingData.from(emptyList()))))
+        private set
+
+    private var allAddedCurrencies: MutableList<CryptoCurrency> = mutableListOf()
+
+    private var wallets: List<UserWallet> by Delegates.notNull()
+
+    private var addedCurrenciesByWallet: MutableMap<UserWallet, MutableList<CryptoCurrency>> = mutableMapOf()
+
+    private var selectedWallet: UserWallet? = null
+
+    private var neededDerivations: Map<UserWallet, List<DerivationData>> = emptyMap()
+
+    private val selectedAppCurrencyFlow: StateFlow<AppCurrency> = createSelectedAppCurrencyFlow()
+
+    private val quotesStateConverter = QuotesToQuotesStateConverter()
+
+    private val networkToNetworkItemStateConverter = NetworkToNetworkItemStateConverter(
+        addedCurrenciesByWalletProvider = Provider { addedCurrenciesByWallet },
+        selectedWalletProvider = Provider { selectedWallet },
+        onNetworkToggleClick = this::onNetworkToggleClick,
+    )
+
+    private val networksToChooseNetworkStateConverter = NetworksToChooseNetworkStateConverter(
+        networkToNetworkItemStateConverter = networkToNetworkItemStateConverter,
+        onNonNativeNetworkHintClick = this::onNonNativeNetworkHintClick,
+        onCloseChooseNetworkScreen = this::onCloseChooseNetworkScreen,
+    )
+
+    private val tokenConverter = TokenConverter(
+        quotesStateConverter = quotesStateConverter,
+        networksToChooseNetworkStateConverter = networksToChooseNetworkStateConverter,
+        allAddedCurrencies = Provider { allAddedCurrencies },
+        selectedAppCurrency = Provider { selectedAppCurrencyFlow.value },
+        onTokenItemButtonClick = this::onTokenItemButtonClick,
+    )
+
+    init {
+        viewModelScope.launch(dispatchers.io) {
+            getWalletsUseCase()
+                .distinctUntilChanged()
+                .collectLatest { userWallets ->
+                    wallets = userWallets.filter { it.isMultiCurrency && !it.isLocked }
+                    wallets.map { wallet ->
+                        val currencies = getCurrenciesUseCase(wallet.walletId).fold(
+                            ifLeft = { emptyList() },
+                            ifRight = { it },
+                        )
+                        allAddedCurrencies += currencies
+                        addedCurrenciesByWallet[wallet] = currencies.toMutableList()
+                    }
+                    withContext(dispatchers.main) {
+                        uiState = uiState.copy(tokens = getInitialTokensList())
+                    }
+                    selectedWallet = getSelectedWalletSyncUseCase().fold(
+                        ifLeft = { null },
+                        ifRight = { if (!it.isMultiCurrency || it.isLocked) null else it },
+                    )
+                    if (selectedWallet == null && wallets.isNotEmpty()) {
+                        selectWalletUseCase(wallets.first().walletId)
+                        selectedWallet = wallets.first()
+                    }
+                    withContext(dispatchers.main) {
+                        neededDerivations = MissingDerivationsIdentifier
+                            .getMissingDerivationsForWallets(wallets, addedCurrenciesByWallet)
+                        updateDerivationNotificationState()
+                        uiState = stateFactory.updateChooseWalletState(wallets, userWallets, selectedWallet)
+                    }
+                }
+        }
+    }
+
+    private fun getInitialTokensList(searchText: String = ""): Flow<PagingData<TokenItemState>> {
+        return getGlobalTokenListUseCase(searchText = searchText).map {
+            it.map { token -> tokenConverter.convert(token) }
+        }
+    }
+
+    private fun isAdded(address: String?, blockchain: Blockchain, currencies: Collection<CryptoCurrency>): Boolean {
+        return if (address != null) {
+            currencies.any {
+                !it.isCustom && it is CryptoCurrency.Token && it.contractAddress == address
+            }
+        } else {
+            currencies.any {
+                !it.isCustom && it is CryptoCurrency.Coin && it.name == blockchain.fullName
+            }
+        }
+    }
+
+    private fun updateDerivationNotificationState() {
+        val derivationNotificationState = if (neededDerivations.isEmpty()) {
+            null
+        } else {
+            DerivationNotificationState(
+                totalNeeded = neededDerivations.values.map { it.map { it.derivationsNeeded() } }.sumOf { it.sum() },
+                totalWallets = wallets.size,
+                walletsToDerive = neededDerivations.keys.size,
+                onGenerateClick = this::onGenerateDerivationClick,
+            )
+        }
+        uiState = uiState.copy(derivationNotification = derivationNotificationState)
+    }
+
+    private fun createSelectedAppCurrencyFlow(): StateFlow<AppCurrency> {
+        return getSelectedAppCurrencyUseCase()
+            .map { maybeAppCurrency ->
+                maybeAppCurrency.getOrElse { AppCurrency.Default }
+            }
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.Eagerly,
+                initialValue = AppCurrency.Default,
+            )
+    }
+
+    override fun onAddCustomTokensButtonClick() {
+        TODO("Not yet implemented") // TODO: add when custom tokens are implemented
+    }
+
+    override fun onSearchQueryChange(query: String) {
+        uiState = uiState.copy(searchBarState = uiState.searchBarState.copy(query = query))
+
+        debouncer.debounce(waitMs = 500L, coroutineScope = viewModelScope + dispatchers.io) {
+            val state = stateFactory.showAddCustomTokensButton(query.isNotBlank())
+            uiState = state.copy(tokens = getInitialTokensList(query))
+        }
+    }
+
+    override fun onSearchActiveChange(active: Boolean) {
+        uiState = uiState.copy(searchBarState = uiState.searchBarState.copy(active = active))
+    }
+
+    override fun onTokenItemButtonClick(token: TokenItemState.Loaded) {
+        when (token.availableAction.value) {
+            TokenButtonType.ADD, TokenButtonType.EDIT -> {
+                uiState = uiState.copy(selectedToken = token)
+
+                val addedCurrenciesOnWallet = addedCurrenciesByWallet[selectedWallet] ?: listOf()
+
+                token.chooseNetworkState.nativeNetworks.forEach {
+                    if (it is NetworkItemState.Toggleable) {
+                        val isAdded = isAdded(it.address, it.blockchain, addedCurrenciesOnWallet)
+                        if (isAdded != it.isAdded.value) (it as? NetworkItemState.Toggleable)?.changeToggleState()
+                    }
+                }
+                token.chooseNetworkState.nonNativeNetworks.forEach {
+                    if (it is NetworkItemState.Toggleable) {
+                        val isAdded = isAdded(it.address, it.blockchain, addedCurrenciesOnWallet)
+                        if (isAdded != it.isAdded.value) (it as? NetworkItemState.Toggleable)?.changeToggleState()
+                    }
+                }
+            }
+            TokenButtonType.NOT_AVAILABLE -> {
+                uiState = stateFactory.getStateAndTriggerEvent(
+                    state = uiState,
+                    event = Event.ShowAlert(
+                        AlertState.TokenUnavailable(
+                            onUpvoteClick = {}, // TODO later, when endpoint is available
+                        ),
+                    ),
+                    setUiState = { uiState = it },
+                )
+            }
+        }
+    }
+
+    override fun onGenerateDerivationClick() {
+        if (neededDerivations.isNotEmpty()) {
+            viewModelScope.launch(dispatchers.io) {
+                val wallet = neededDerivations.keys.firstOrNull()
+                val derivations = neededDerivations[wallet]?.toMapOfDerivations()
+                if (wallet == null || derivations.isNullOrEmpty()) return@launch
+
+                derivePublicKeysUseCase(cardId = null, derivations = derivations)
+                    .onRight {
+                        val newDerivedKeys = it.entries
+                        val oldDerivedKeys = wallet.scanResponse.derivedKeys
+
+                        val walletKeys = (newDerivedKeys.keys + oldDerivedKeys.keys).toSet()
+
+                        val updatedDerivedKeys = walletKeys.associateWith { walletKey ->
+                            val oldDerivations = ExtendedPublicKeysMap(oldDerivedKeys[walletKey] ?: emptyMap())
+                            val newDerivations = newDerivedKeys[walletKey] ?: ExtendedPublicKeysMap(emptyMap())
+                            ExtendedPublicKeysMap(oldDerivations + newDerivations)
+                        }
+                        val updatedScanResponse = wallet.scanResponse.copy(derivedKeys = updatedDerivedKeys)
+
+                        updateWalletUseCase(
+                            userWalletId = wallet.walletId,
+                            update = { userWallet -> userWallet.copy(scanResponse = updatedScanResponse) },
+                        ).onRight { userWallet ->
+                            fetchTokenListUseCase(userWalletId = userWallet.walletId)
+                        }
+
+                        updateDerivationNotificationState()
+                    }
+            }
+        }
+    }
+
+    override fun onBackClick() {
+        TODO("Not yet implemented") // TODO: implement if needed when custom tokens and bottom sheet is complete
+    }
+
+    override fun onCloseChooseNetworkScreen() {
+        uiState = uiState.copy(selectedToken = null)
+    }
+
+    override fun onNetworkToggleClick(token: TokenItemState.Loaded, network: NetworkItemState.Toggleable) {
+        val selectedWallet = selectedWallet ?: return
+        if (!selectedWallet.isMultiCurrency || selectedWallet.isLocked) return
+
+        if (network.isAdded.value) {
+            toggleToken(token, network, selectedWallet)
+        } else {
+            TokenCompatibility(selectedWallet)
+                .check(network.blockchain, network.address == null)
+                .fold(
+                    ifLeft = { error ->
+                        val alert = when (error) {
+                            TokenCompatibility.AddTokenError.SolanaTokensUnsupported ->
+                                AlertState.TokensUnsupported(network.blockchain.fullName)
+                            TokenCompatibility.AddTokenError.UnsupportedBlockchain ->
+                                AlertState.TokensUnsupportedBlockchainByCard(network.blockchain.fullName)
+                            TokenCompatibility.AddTokenError.UnsupportedCurve ->
+                                AlertState.TokensUnsupportedCurve
+                        }
+                        uiState = stateFactory.getStateAndTriggerEvent(
+                            state = uiState,
+                            event = Event.ShowAlert(alert),
+                            setUiState = { uiState = it },
+                        )
+                    },
+                    ifRight = {
+                        toggleToken(token, network, selectedWallet)
+                    },
+                )
+        }
+    }
+
+    private fun toggleToken(
+        token: TokenItemState.Loaded,
+        network: NetworkItemState.Toggleable,
+        selectedWallet: UserWallet,
+    ) {
+        val cryptoCurrency = requireNotNull(
+            TokenToCryptoCurrencyConverter(
+                network = network,
+                derivationStyleProvider = selectedWallet.scanResponse.derivationStyleProvider,
+            ).convert(token),
+        ) {
+            "It is only null if Blockchain is Unknown, which mustn't happen here"
+        }
+
+        if (!network.isAdded.value) {
+            addedCurrenciesByWallet[selectedWallet]?.add(cryptoCurrency)
+            allAddedCurrencies.add(cryptoCurrency)
+            viewModelScope.launch(dispatchers.io) {
+                addCryptoCurrenciesUseCase(selectedWallet.walletId, cryptoCurrency)
+            }
+        } else {
+            addedCurrenciesByWallet[selectedWallet]?.remove(cryptoCurrency)
+            allAddedCurrencies.remove(cryptoCurrency)
+            viewModelScope.launch(dispatchers.io) {
+                removeCurrencyUseCase(selectedWallet.walletId, cryptoCurrency)
+            }
+        }
+        network.changeToggleState()
+        val isAnyAdded = token.chooseNetworkState.nativeNetworks.any {
+            it is NetworkItemState.Toggleable && isAdded(
+                address = it.address,
+                blockchain = it.blockchain,
+                currencies = allAddedCurrencies,
+            )
+        } || token.chooseNetworkState.nonNativeNetworks.any {
+            it is NetworkItemState.Toggleable && isAdded(
+                address = it.address,
+                blockchain = it.blockchain,
+                currencies = allAddedCurrencies,
+            )
+        }
+        val buttonType = if (isAnyAdded) TokenButtonType.EDIT else TokenButtonType.ADD
+        token.availableAction.value = buttonType
+        neededDerivations = MissingDerivationsIdentifier
+            .getMissingDerivationsForWallets(wallets, addedCurrenciesByWallet)
+        updateDerivationNotificationState()
+    }
+
+    override fun onNonNativeNetworkHintClick() {
+        uiState = stateFactory.getStateAndTriggerEvent(
+            state = uiState,
+            event = Event.ShowAlert(AlertState.NonNative),
+            setUiState = { uiState = it },
+        )
+    }
+
+    override fun onSelectWalletsClick() {
+        uiState = uiState.copy(
+            showChooseWalletScreen = true,
+        )
+    }
+
+    override fun onChooseWalletClick() {
+        uiState = uiState.copy(
+            showChooseWalletScreen = true,
+        )
+    }
+
+    override fun onCloseChoosingWalletClick() {
+        uiState = uiState.copy(
+            showChooseWalletScreen = false,
+        )
+    }
+
+    override fun onWalletSelected(walletId: String) {
+        viewModelScope.launch(dispatchers.io) {
+            selectWalletUseCase(UserWalletId(walletId))
+        }
+        selectedWallet = wallets.find { it.walletId.stringValue == walletId }
+        uiState.selectedToken?.let { onTokenItemButtonClick(it) }
+        uiState = stateFactory.updateSelectedWallet(selectedWalletId = selectedWallet?.walletId?.stringValue)
+    }
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/viewmodels/MissingDerivationsIdentifier.kt

@@ -0,0 +1,95 @@
+package com.tangem.managetokens.presentation.managetokens.viewmodels
+
+import com.tangem.blockchain.blockchains.cardano.CardanoUtils
+import com.tangem.blockchain.common.Blockchain
+import com.tangem.common.card.EllipticCurve
+import com.tangem.common.extensions.ByteArrayKey
+import com.tangem.common.extensions.toMapKey
+import com.tangem.crypto.hdWallet.DerivationPath
+import com.tangem.domain.common.configs.CardConfig
+import com.tangem.domain.common.util.derivationStyleProvider
+import com.tangem.domain.models.scan.ScanResponse
+import com.tangem.domain.tokens.model.CryptoCurrency
+import com.tangem.domain.wallets.models.UserWallet
+import com.tangem.operations.derivation.ExtendedPublicKeysMap
+
+object MissingDerivationsIdentifier {
+
+    fun getMissingDerivationsForWallets(
+        wallets: List<UserWallet>,
+        addedCurrenciesByWallet: MutableMap<UserWallet, MutableList<CryptoCurrency>>,
+    ): Map<UserWallet, List<DerivationData>> {
+        return wallets.associateWith { wallet ->
+            val currencies = addedCurrenciesByWallet[wallet] ?: emptyList()
+            val config = CardConfig.createConfig(wallet.scanResponse.card)
+            val missingDerivationsByCurrency = currencies.mapNotNull { currency ->
+                config.primaryCurve(blockchain = Blockchain.fromId(currency.network.id.value))?.let { curve ->
+                    getMissingDerivations(curve, wallet.scanResponse, currency)
+                }
+            }
+            collectMissingDerivationsByPublicKey(missingDerivationsByCurrency)
+        }.filter { it.value.isNotEmpty() }
+    }
+
+    private fun getMissingDerivations(
+        curve: EllipticCurve,
+        scanResponse: ScanResponse,
+        currency: CryptoCurrency,
+    ): DerivationData? {
+        val wallet = scanResponse.card.wallets.firstOrNull { it.curve == curve } ?: return null
+
+        val blockchain = Blockchain.fromId(currency.network.id.value)
+        val supportedCurves = blockchain.getSupportedCurves()
+        val path = blockchain.derivationPath(scanResponse.derivationStyleProvider.getDerivationStyle())
+            .takeIf { supportedCurves.contains(curve) }
+
+        val customPath = currency.network.derivationPath.value?.let {
+            DerivationPath(it)
+        }.takeIf { supportedCurves.contains(curve) }
+
+        val bothCandidates = listOfNotNull(path, customPath).distinct().toMutableList()
+        if (bothCandidates.isEmpty()) return null
+
+        if (currency is CryptoCurrency.Coin && blockchain == Blockchain.Cardano) {
+            currency.network.derivationPath.value?.let {
+                bothCandidates.add(CardanoUtils.extendedDerivationPath(DerivationPath(it)))
+            }
+        }
+
+        val mapKeyOfWalletPublicKey = wallet.publicKey.toMapKey()
+        val alreadyDerivedKeys: ExtendedPublicKeysMap =
+            scanResponse.derivedKeys[mapKeyOfWalletPublicKey] ?: ExtendedPublicKeysMap(emptyMap())
+        val alreadyDerivedPaths = alreadyDerivedKeys.keys.toList()
+
+        val toDerive = bothCandidates.filterNot { alreadyDerivedPaths.contains(it) }
+        if (toDerive.isEmpty()) return null
+
+        return DerivationData(derivations = mapKeyOfWalletPublicKey to toDerive)
+    }
+
+    private fun collectMissingDerivationsByPublicKey(
+        missingDerivationsByCurrency: List<DerivationData>,
+    ): List<DerivationData> {
+        return buildMap<ByteArrayKey, MutableList<DerivationPath>> {
+            missingDerivationsByCurrency.forEach { derivationData ->
+                val currentEntry = this[derivationData.derivations.first]
+                if (currentEntry != null) {
+                    currentEntry.addAll(derivationData.derivations.second)
+                    currentEntry.distinct()
+                } else {
+                    this[derivationData.derivations.first] = derivationData.derivations.second.toMutableList()
+                }
+            }
+        }.map { DerivationData(it.key to it.value) }
+    }
+}
+
+class DerivationData(val derivations: Pair<ByteArrayKey, List<DerivationPath>>) {
+    fun derivationsNeeded(): Int {
+        return derivations.second.size
+    }
+}
+
+internal fun List<DerivationData>.toMapOfDerivations(): Map<ByteArrayKey, List<DerivationPath>> {
+    return associate { it.derivations }
+}

features/manage-tokens/impl/src/main/java/com/tangem/managetokens/presentation/managetokens/viewmodels/TokenCompatibility.kt

@@ -0,0 +1,51 @@
+package com.tangem.managetokens.presentation.managetokens.viewmodels
+
+import arrow.core.Either
+import arrow.core.left
+import arrow.core.right
+import com.tangem.blockchain.common.Blockchain
+import com.tangem.domain.common.extensions.canHandleBlockchain
+import com.tangem.domain.common.extensions.canHandleToken
+import com.tangem.domain.common.extensions.supportedTokens
+import com.tangem.domain.common.util.cardTypesResolver
+import com.tangem.domain.wallets.models.UserWallet
+
+class TokenCompatibility(private val selectedWallet: UserWallet) {
+
+    fun check(blockchain: Blockchain, isMainNetwork: Boolean): Either<AddTokenError, Unit> {
+        val error = if (isMainNetwork) isUnsupportedBlockchain(blockchain) else isUnsupportedToken(blockchain)
+        return error?.left() ?: Unit.right()
+    }
+
+    private fun isUnsupportedToken(blockchain: Blockchain): AddTokenError? {
+        val cardTypesResolver = selectedWallet.scanResponse.cardTypesResolver
+        val blockchainsSupportingTokens = selectedWallet.scanResponse.card.supportedTokens(cardTypesResolver)
+
+        if (blockchain == Blockchain.Solana && !blockchainsSupportingTokens.contains(Blockchain.Solana)) {
+            return AddTokenError.SolanaTokensUnsupported
+        }
+        val canHandleToken = selectedWallet.scanResponse.card.canHandleToken(
+            supportedTokens = blockchainsSupportingTokens,
+            blockchain = blockchain,
+            cardTypesResolver = cardTypesResolver,
+        )
+        if (!canHandleToken) {
+            return AddTokenError.UnsupportedCurve
+        }
+        return null
+    }
+
+    private fun isUnsupportedBlockchain(blockchain: Blockchain): AddTokenError? {
+        val isSupported = selectedWallet.scanResponse.card.canHandleBlockchain(
+            blockchain = blockchain,
+            cardTypesResolver = selectedWallet.scanResponse.cardTypesResolver,
+        )
+        return if (!isSupported) AddTokenError.UnsupportedBlockchain else null
+    }
+
+    sealed class AddTokenError {
+        object SolanaTokensUnsupported : AddTokenError()
+        object UnsupportedCurve : AddTokenError()
+        object UnsupportedBlockchain : AddTokenError()
+    }
+}