Updated on 2026-08-14
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Tangem
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62ddda3e69
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20 changed files with 254 additions and 169 deletions
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@ -4,7 +4,9 @@ import com.tangem.core.decompose.model.Model
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import com.tangem.feature.wallet.DefaultWalletEntryComponent
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import com.tangem.feature.wallet.child.organizetokens.model.OrganizeTokensModel
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import com.tangem.feature.wallet.child.wallet.model.WalletModel
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import com.tangem.feature.wallet.utils.DefaultUserWalletsFetcher
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import com.tangem.features.wallet.WalletEntryComponent
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import com.tangem.features.wallet.utils.UserWalletsFetcher
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import dagger.Binds
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import dagger.Module
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import dagger.hilt.InstallIn
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@ -19,6 +21,9 @@ internal interface WalletFeatureModule {
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@Binds
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fun bindComponentFactory(impl: DefaultWalletEntryComponent.Factory): WalletEntryComponent.Factory
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@Binds
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fun bindUserWalletsFetcher(impl: DefaultUserWalletsFetcher.Factory): UserWalletsFetcher.Factory
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@Binds
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@IntoMap
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@ClassKey(WalletModel::class)
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@ -0,0 +1,149 @@
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package com.tangem.feature.wallet.utils
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import arrow.core.Either
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import com.tangem.common.ui.userwallet.converter.UserWalletItemUMConverter
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import com.tangem.common.ui.userwallet.state.UserWalletItemUM
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import com.tangem.core.decompose.ui.UiMessageSender
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import com.tangem.core.ui.extensions.resourceReference
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import com.tangem.core.ui.message.SnackbarMessage
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import com.tangem.domain.appcurrency.GetSelectedAppCurrencyUseCase
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import com.tangem.domain.appcurrency.error.SelectedAppCurrencyError
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import com.tangem.domain.appcurrency.model.AppCurrency
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import com.tangem.domain.balancehiding.BalanceHidingSettings
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import com.tangem.domain.balancehiding.GetBalanceHidingSettingsUseCase
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import com.tangem.domain.core.lce.Lce
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import com.tangem.feature.wallet.impl.R
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import com.tangem.domain.core.lce.lce
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import com.tangem.domain.core.utils.getOrElse
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import com.tangem.domain.core.utils.toLce
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import com.tangem.domain.models.ArtworkModel
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import com.tangem.domain.tokens.GetWalletTotalBalanceUseCase
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import com.tangem.domain.tokens.error.TokenListError
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import com.tangem.domain.tokens.model.TotalFiatBalance
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import com.tangem.domain.wallets.models.UserWallet
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import com.tangem.domain.wallets.models.UserWalletId
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import com.tangem.domain.wallets.usecase.GetCardImageUseCase
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import com.tangem.domain.wallets.usecase.GetWalletsUseCase
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import com.tangem.features.wallet.utils.UserWalletsFetcher
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import com.tangem.operations.attestation.ArtworkSize
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import dagger.assisted.Assisted
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import dagger.assisted.AssistedFactory
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import dagger.assisted.AssistedInject
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import kotlinx.collections.immutable.ImmutableList
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import kotlinx.collections.immutable.toImmutableList
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import kotlinx.coroutines.ExperimentalCoroutinesApi
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import kotlinx.coroutines.flow.*
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@Suppress("LongParameterList")
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internal class DefaultUserWalletsFetcher @AssistedInject constructor(
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getWalletsUseCase: GetWalletsUseCase,
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private val getWalletTotalBalanceUseCase: GetWalletTotalBalanceUseCase,
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private val getSelectedAppCurrencyUseCase: GetSelectedAppCurrencyUseCase,
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private val getBalanceHidingSettingsUseCase: GetBalanceHidingSettingsUseCase,
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@Assisted private val onWalletClick: (UserWalletId) -> Unit,
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@Assisted private val messageSender: UiMessageSender,
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private val getCardImageUseCase: GetCardImageUseCase,
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) : UserWalletsFetcher {
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private var loadedArtworks: HashMap<UserWalletId, ArtworkModel> = hashMapOf()
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@OptIn(ExperimentalCoroutinesApi::class)
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override val userWallets: Flow<ImmutableList<UserWalletItemUM>> = getWalletsUseCase().transformLatest { wallets ->
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val uiModels = UserWalletItemUMConverter(onClick = { onWalletClick(it) }).convertList(wallets)
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.toImmutableList()
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emit(uiModels)
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combine(
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flow = getSelectedAppCurrencyUseCase().distinctUntilChanged(),
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flow2 = getBalanceHidingSettingsUseCase().distinctUntilChanged(),
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flow3 = getWalletTotalBalanceUseCase(wallets.map(UserWallet::walletId)).distinctUntilChanged(),
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flow4 = loadArtworks(wallets),
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) { maybeAppCurrency, balanceHidingSettings, maybeBalances, artworks ->
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val models = createUiModels(
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wallets = wallets,
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maybeAppCurrency = maybeAppCurrency,
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maybeBalances = maybeBalances,
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balanceHidingSettings = balanceHidingSettings,
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artworks = artworks,
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).getOrElse(
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ifLoading = { return@combine },
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ifError = {
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val message = resourceReference(R.string.common_unknown_error)
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messageSender.send(SnackbarMessage(message))
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return@combine
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},
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)
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emit(models)
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}.collect()
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}
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private fun loadArtworks(wallets: List<UserWallet>): Flow<HashMap<UserWalletId, ArtworkModel>> {
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return flow {
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emit(hashMapOf()) // emits right away so the transform doesn't wait for the images' loading to finish
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wallets.forEach { wallet ->
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val artwork = getCardImageUseCase(
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cardId = wallet.cardId,
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manufacturerName = wallet.scanResponse.card.manufacturer.name,
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firmwareVersion = wallet.scanResponse.card.firmwareVersion.toSdkFirmwareVersion(),
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cardPublicKey = wallet.scanResponse.card.cardPublicKey,
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size = ArtworkSize.SMALL,
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)
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loadedArtworks[wallet.walletId] = artwork
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emit(loadedArtworks)
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}
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}
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}
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private fun createUiModels(
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wallets: List<UserWallet>,
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maybeAppCurrency: Either<SelectedAppCurrencyError, AppCurrency>,
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maybeBalances: Lce<TokenListError, Map<UserWalletId, TotalFiatBalance>>,
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balanceHidingSettings: BalanceHidingSettings,
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artworks: HashMap<UserWalletId, ArtworkModel>,
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): Lce<Error, ImmutableList<UserWalletItemUM>> = lce {
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val balances = withError(
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transform = { Error.UnableToGetBalances },
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block = {
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maybeBalances.bindOrNull().orEmpty()
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.filterKeys { userWalletId -> wallets.any { it.walletId == userWalletId } }
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.mapKeys { entry -> wallets.first { it.walletId == entry.key } }
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},
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)
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val appCurrency = withError(
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transform = { Error.UnableToGetAppCurrency },
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block = { maybeAppCurrency.toLce().bind() },
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)
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balances
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.map { (userWallet, balance) ->
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UserWalletItemUMConverter(
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onClick = { onWalletClick(it) },
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appCurrency = appCurrency,
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balance = balance,
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isBalanceHidden = balanceHidingSettings.isBalanceHidden,
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artwork = artworks[userWallet.walletId],
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)
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.convert(userWallet)
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}
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.toImmutableList()
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}
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sealed class Error {
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data object UnableToGetAppCurrency : Error()
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data object UnableToGetBalances : Error()
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}
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@AssistedFactory
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interface Factory : UserWalletsFetcher.Factory {
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override fun create(
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messageSender: UiMessageSender,
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onWalletClick: (UserWalletId) -> Unit,
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): DefaultUserWalletsFetcher
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}
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}
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