Updated on 2026-08-14

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

@@ -20,11 +20,7 @@ import com.tangem.domain.staking.single.SingleYieldBalanceSupplier
 import com.tangem.domain.tokens.*
 import com.tangem.domain.tokens.operations.BaseCurrencyStatusOperations
 import com.tangem.domain.tokens.operations.CachedCurrenciesStatusesOperations
-import com.tangem.domain.tokens.repository.CurrenciesRepository
-import com.tangem.domain.tokens.repository.CurrencyChecksRepository
-import com.tangem.domain.tokens.repository.PolkadotAccountHealthCheckRepository
-import com.tangem.domain.tokens.repository.TokenReceiveWarningsViewedRepository
-import com.tangem.domain.tokens.repository.YieldSupplyWarningsViewedRepository
+import com.tangem.domain.tokens.repository.*
 import com.tangem.domain.tokens.wallet.WalletBalanceFetcher
 import com.tangem.domain.walletmanager.WalletManagersFacade
 import com.tangem.tap.domain.tokens.DefaultTokensFeatureToggles
@@ -60,24 +56,6 @@ internal object TokensDomainModule {
         )
     }
 
-    @Provides
-    @Singleton
-    fun provideFetchTokenListUseCase(
-        currenciesRepository: CurrenciesRepository,
-        multiNetworkStatusFetcher: MultiNetworkStatusFetcher,
-        multiQuoteStatusFetcher: MultiQuoteStatusFetcher,
-        multiYieldBalanceFetcher: MultiYieldBalanceFetcher,
-        stakingIdFactory: StakingIdFactory,
-    ): FetchTokenListUseCase {
-        return FetchTokenListUseCase(
-            currenciesRepository = currenciesRepository,
-            multiNetworkStatusFetcher = multiNetworkStatusFetcher,
-            multiQuoteStatusFetcher = multiQuoteStatusFetcher,
-            multiYieldBalanceFetcher = multiYieldBalanceFetcher,
-            stakingIdFactory = stakingIdFactory,
-        )
-    }
-
     @Provides
     @Singleton
     fun provideFetchPendingTransactionsUseCase(
@@ -184,24 +162,6 @@ internal object TokensDomainModule {
         )
     }
 
-    @Provides
-    @Singleton
-    fun provideFetchCardTokenListUseCase(
-        currenciesRepository: CurrenciesRepository,
-        multiNetworkStatusFetcher: MultiNetworkStatusFetcher,
-        multiQuoteStatusFetcher: MultiQuoteStatusFetcher,
-        multiYieldBalanceFetcher: MultiYieldBalanceFetcher,
-        stakingIdFactory: StakingIdFactory,
-    ): FetchCardTokenListUseCase {
-        return FetchCardTokenListUseCase(
-            currenciesRepository = currenciesRepository,
-            multiNetworkStatusFetcher = multiNetworkStatusFetcher,
-            multiQuoteStatusFetcher = multiQuoteStatusFetcher,
-            multiYieldBalanceFetcher = multiYieldBalanceFetcher,
-            stakingIdFactory = stakingIdFactory,
-        )
-    }
-
     @Provides
     @Singleton
     fun provideGetCryptoCurrencyUseCase(

data/account/build.gradle.kts

@@ -27,6 +27,7 @@ dependencies {
     api(projects.domain.common)
     api(projects.domain.models)
     api(projects.domain.tokens)
+    api(projects.domain.wallets)
     // endregion
 
     // region Project - Data

data/account/src/main/kotlin/com/tangem/data/account/fetcher/DefaultWalletAccountsFetcher.kt

@@ -51,18 +51,25 @@ internal class DefaultWalletAccountsFetcher @Inject constructor(
     private val dispatchers: CoroutineDispatcherProvider,
 ) : WalletAccountsFetcher, WalletAccountsSaver {
 
-    override suspend fun fetch(userWalletId: UserWalletId) {
+    override suspend fun fetch(userWalletId: UserWalletId): GetWalletAccountsResponse {
         val savedAccountsResponse = getAccountsResponseStore(userWalletId = userWalletId).getSyncOrNull()
         val accountsResponse = fetchWalletAccounts(userWalletId, savedAccountsResponse)
-            ?: return
 
-        if (accountsResponse.accounts.isEmpty()) {
-            initializeAccounts(userWalletId, accountsResponse)
-        } else if (accountsResponse.unassignedTokens.isNotEmpty()) {
-            assignTokens(userWalletId, accountsResponse)
+        return when {
+            accountsResponse.accounts.isEmpty() -> {
+                initializeAccounts(userWalletId, accountsResponse)
+            }
+            accountsResponse.unassignedTokens.isNotEmpty() -> {
+                assignTokens(userWalletId, accountsResponse)
+            }
+            else -> accountsResponse
         }
     }
 
+    override suspend fun getSaved(userWalletId: UserWalletId): GetWalletAccountsResponse? {
+        return getAccountsResponseStore(userWalletId = userWalletId).getSyncOrNull()
+    }
+
     override suspend fun store(userWalletId: UserWalletId, response: GetWalletAccountsResponse) {
         val store = getAccountsResponseStore(userWalletId = userWalletId)
 
@@ -115,7 +122,7 @@ internal class DefaultWalletAccountsFetcher @Inject constructor(
     private suspend fun fetchWalletAccounts(
         userWalletId: UserWalletId,
         savedAccountsResponse: GetWalletAccountsResponse?,
-    ): GetWalletAccountsResponse? {
+    ): GetWalletAccountsResponse {
         return safeApiCall(
             call = {
                 val apiResponse = withContext(dispatchers.io) {
@@ -145,7 +152,10 @@ internal class DefaultWalletAccountsFetcher @Inject constructor(
         )
     }
 
-    private suspend fun initializeAccounts(userWalletId: UserWalletId, accountsResponse: GetWalletAccountsResponse) {
+    private suspend fun initializeAccounts(
+        userWalletId: UserWalletId,
+        accountsResponse: GetWalletAccountsResponse,
+    ): GetWalletAccountsResponse {
         val response = defaultWalletAccountsResponseFactory.create(
             userWalletId = userWalletId,
             userTokensResponse = UserTokensResponse(
@@ -156,14 +166,17 @@ internal class DefaultWalletAccountsFetcher @Inject constructor(
         )
 
         userTokensSaver.push(userWalletId = userWalletId, response = response.toUserTokensResponse())
-        val syncedResponse = push(userWalletId = userWalletId, accounts = response.accounts)
+        val syncedResponse = push(userWalletId = userWalletId, accounts = response.accounts) ?: response
 
-        if (syncedResponse != null) {
-            store(userWalletId = userWalletId, response = syncedResponse)
-        }
+        store(userWalletId = userWalletId, response = syncedResponse)
+
+        return syncedResponse
     }
 
-    private suspend fun assignTokens(userWalletId: UserWalletId, accountsResponse: GetWalletAccountsResponse) {
+    private suspend fun assignTokens(
+        userWalletId: UserWalletId,
+        accountsResponse: GetWalletAccountsResponse,
+    ): GetWalletAccountsResponse {
         val accountsResponseWithTokens = accountsResponse.assignTokens(userWalletId)
 
         store(userWalletId = userWalletId, response = accountsResponseWithTokens)
@@ -172,6 +185,8 @@ internal class DefaultWalletAccountsFetcher @Inject constructor(
             userWalletId = userWalletId,
             response = accountsResponseWithTokens.toUserTokensResponse(),
         )
+
+        return accountsResponseWithTokens
     }
 
     private suspend fun getETag(userWalletId: UserWalletId): String? {

data/account/src/main/kotlin/com/tangem/data/account/fetcher/FetchWalletAccountsErrorHandler.kt

@@ -49,11 +49,13 @@ internal class FetchWalletAccountsErrorHandler @Inject constructor(
         savedAccountsResponse: GetWalletAccountsResponse?,
         pushWalletAccounts: suspend (UserWalletId, List<WalletAccountDTO>) -> GetWalletAccountsResponse?,
         storeWalletAccounts: suspend (UserWalletId, GetWalletAccountsResponse) -> Unit,
-    ): GetWalletAccountsResponse? {
+    ): GetWalletAccountsResponse {
         val isResponseUpToDate = error.isNetworkError(code = Code.NOT_MODIFIED)
         if (isResponseUpToDate) {
             Timber.e("ETag is up to date, no need to update accounts for wallet: $userWalletId")
-            return savedAccountsResponse
+            return requireNotNull(savedAccountsResponse) {
+                "Saved accounts response is null for wallet: $userWalletId"
+            }
         }
 
         var response = savedAccountsResponse ?: createDefaultResponse(userWalletId)

data/account/src/test/java/com/tangem/data/account/fetcher/DefaultSingleAccountListFetcherTest.kt

@@ -29,6 +29,8 @@ class DefaultSingleAccountListFetcherTest {
         // Arrange
         val params = SingleAccountListFetcher.Params(userWalletId = userWalletId)
 
+        coEvery { walletAccountsFetcher.fetch(userWalletId) } returns mockk()
+
         // Act
         val actual = fetcher.invoke(params)
 

data/account/src/test/java/com/tangem/data/account/fetcher/DefaultWalletAccountsFetcherTest.kt

@@ -199,7 +199,7 @@ class DefaultWalletAccountsFetcherTest {
         @Test
         fun `fetch should call error handler when getWalletAccounts returns error`() = runTest {
             // Arrange
-            val savedAccountsResponse = null
+            val savedAccountsResponse = createGetWalletAccountsResponse(userWalletId)
             val apiError = ApiResponse.Error(ApiResponseError.NetworkException())
 
             accountsResponseStoreFlow.value = savedAccountsResponse
@@ -212,7 +212,7 @@ class DefaultWalletAccountsFetcherTest {
                 fetchWalletAccountsErrorHandler.handle(
                     error = apiError.cause,
                     userWalletId = userWalletId,
-                    savedAccountsResponse = null,
+                    savedAccountsResponse = savedAccountsResponse,
                     pushWalletAccounts = any(),
                     storeWalletAccounts = any(),
                 )
@@ -231,7 +231,7 @@ class DefaultWalletAccountsFetcherTest {
                 fetchWalletAccountsErrorHandler.handle(
                     error = apiError.cause,
                     userWalletId = userWalletId,
-                    savedAccountsResponse = null,
+                    savedAccountsResponse = savedAccountsResponse,
                     pushWalletAccounts = any(),
                     storeWalletAccounts = any(),
                 )

data/account/src/test/java/com/tangem/data/account/fetcher/FetchWalletAccountsErrorHandlerTest.kt

@@ -53,6 +53,8 @@ class FetchWalletAccountsErrorHandlerTest {
     @Test
     fun `does not update accounts when response is up to date`() = runTest {
         // Arrange
+        val response = createGetWalletAccountsResponse(userWalletId)
+
         val error = ApiResponseError.HttpException(
             code = Code.NOT_MODIFIED,
             message = "Not Modified",
@@ -63,7 +65,7 @@ class FetchWalletAccountsErrorHandlerTest {
         handler.handle(
             error = error,
             userWalletId = userWalletId,
-            savedAccountsResponse = null,
+            savedAccountsResponse = response,
             pushWalletAccounts = pushWalletAccounts,
             storeWalletAccounts = storeWalletAccounts,
         )

data/common/src/main/kotlin/com/tangem/data/common/account/WalletAccountsFetcher.kt

@@ -1,5 +1,6 @@
 package com.tangem.data.common.account
 
+import com.tangem.datasource.api.tangemTech.models.account.GetWalletAccountsResponse
 import com.tangem.domain.models.wallet.UserWalletId
 
 /**
@@ -11,5 +12,8 @@ interface WalletAccountsFetcher {
 
     /** Fetch wallet accounts by [userWalletId] */
     @Throws
-    suspend fun fetch(userWalletId: UserWalletId)
+    suspend fun fetch(userWalletId: UserWalletId): GetWalletAccountsResponse
+
+    /** Get saved wallet accounts by [userWalletId] */
+    suspend fun getSaved(userWalletId: UserWalletId): GetWalletAccountsResponse?
 }

data/tokens/src/main/kotlin/com/tangem/data/tokens/AccountListCryptoCurrenciesFetcher.kt

@@ -1,6 +1,7 @@
 package com.tangem.data.tokens
 
 import arrow.core.Either
+import arrow.core.right
 import com.tangem.data.common.account.WalletAccountsFetcher
 import com.tangem.datasource.local.userwallet.UserWalletsStore
 import com.tangem.domain.core.utils.catchOn
@@ -25,11 +26,15 @@ internal class AccountListCryptoCurrenciesFetcher(
     private val dispatchers: CoroutineDispatcherProvider,
 ) : MultiWalletCryptoCurrenciesFetcher {
 
-    override suspend fun invoke(params: Params) = Either.catchOn(dispatchers.default) {
-        val userWallet = userWalletsStore.getSyncStrict(key = params.userWalletId)
+    override suspend fun invoke(params: Params): Either<Throwable, Unit> {
+        return Either.catchOn(dispatchers.default) {
+            val userWallet = userWalletsStore.getSyncStrict(key = params.userWalletId)
 
-        if (!userWallet.isMultiCurrency) error("${this::class.simpleName} supports only multi-currency wallet")
+            if (!userWallet.isMultiCurrency) error("${this::class.simpleName} supports only multi-currency wallet")
 
-        walletAccountsFetcher.fetch(userWalletId = params.userWalletId)
+            walletAccountsFetcher.fetch(userWalletId = params.userWalletId)
+
+            Unit.right()
+        }
     }
 }

data/tokens/src/test/kotlin/com/tangem/data/tokens/AccountListCryptoCurrenciesFetcherTest.kt

@@ -61,6 +61,7 @@ internal class AccountListCryptoCurrenciesFetcherTest {
         val mockUserWallet = mockk<UserWallet> { every { isMultiCurrency } returns true }
 
         every { userWalletsStore.getSyncStrict(key = params.userWalletId) } returns mockUserWallet
+        coEvery { walletAccountsFetcher.fetch(userWalletId = params.userWalletId) } returns mockk()
 
         // Act
         val actual = fetcher(params)

domain/tokens/src/main/kotlin/com/tangem/domain/tokens/FetchCardTokenListUseCase.kt

@@ -1,96 +0,0 @@
-package com.tangem.domain.tokens
-
-import arrow.core.Either
-import arrow.core.raise.Raise
-import arrow.core.raise.catch
-import arrow.core.raise.either
-import com.tangem.domain.models.currency.CryptoCurrency
-import com.tangem.domain.models.network.Network
-import com.tangem.domain.models.wallet.UserWalletId
-import com.tangem.domain.networks.multi.MultiNetworkStatusFetcher
-import com.tangem.domain.quotes.multi.MultiQuoteStatusFetcher
-import com.tangem.domain.staking.StakingIdFactory
-import com.tangem.domain.staking.multi.MultiYieldBalanceFetcher
-import com.tangem.domain.tokens.error.TokenListError
-import com.tangem.domain.tokens.repository.CurrenciesRepository
-import kotlinx.coroutines.async
-import kotlinx.coroutines.awaitAll
-import kotlinx.coroutines.coroutineScope
-
-class FetchCardTokenListUseCase(
-    private val currenciesRepository: CurrenciesRepository,
-    private val multiNetworkStatusFetcher: MultiNetworkStatusFetcher,
-    private val multiQuoteStatusFetcher: MultiQuoteStatusFetcher,
-    private val multiYieldBalanceFetcher: MultiYieldBalanceFetcher,
-    private val stakingIdFactory: StakingIdFactory,
-) {
-
-    suspend operator fun invoke(userWalletId: UserWalletId, refresh: Boolean = false): Either<TokenListError, Unit> {
-        return either {
-            val currencies = fetchCurrencies(userWalletId = userWalletId, refresh = refresh)
-
-            coroutineScope {
-                val fetchStatuses = async {
-                    fetchNetworksStatuses(
-                        userWalletId = userWalletId,
-                        networks = currencies.mapTo(destination = hashSetOf(), transform = CryptoCurrency::network),
-                    )
-                }
-                val fetchQuotes = async {
-                    fetchQuotes(
-                        currenciesIds = currencies.mapNotNullTo(destination = hashSetOf()) { it.id.rawCurrencyId },
-                    )
-                }
-                val yieldBalances = async {
-                    fetchYieldBalances(
-                        userWalletId = userWalletId,
-                        currencies = currencies,
-                    )
-                }
-                awaitAll(fetchStatuses, fetchQuotes, yieldBalances)
-            }
-        }
-    }
-
-    private suspend fun Raise<TokenListError>.fetchCurrencies(
-        userWalletId: UserWalletId,
-        refresh: Boolean = false,
-    ): List<CryptoCurrency> {
-        return catch(
-            block = {
-                currenciesRepository.getSingleCurrencyWalletWithCardCurrencies(
-                    userWalletId = userWalletId,
-                    refresh = refresh,
-                )
-            },
-            catch = { raise(TokenListError.DataError(it)) },
-        )
-    }
-
-    private suspend fun Raise<TokenListError>.fetchNetworksStatuses(
-        userWalletId: UserWalletId,
-        networks: Set<Network>,
-    ) {
-        multiNetworkStatusFetcher(
-            MultiNetworkStatusFetcher.Params(userWalletId = userWalletId, networks = networks),
-        )
-            .mapLeft(TokenListError::DataError)
-            .bind()
-    }
-
-    private suspend fun fetchQuotes(currenciesIds: Set<CryptoCurrency.RawID>) {
-        multiQuoteStatusFetcher(
-            params = MultiQuoteStatusFetcher.Params(currenciesIds = currenciesIds, appCurrencyId = null),
-        )
-    }
-
-    private suspend fun fetchYieldBalances(userWalletId: UserWalletId, currencies: List<CryptoCurrency>) {
-        val stakingIds = currencies.mapNotNullTo(hashSetOf()) {
-            stakingIdFactory.create(userWalletId = userWalletId, cryptoCurrency = it).getOrNull()
-        }
-
-        multiYieldBalanceFetcher(
-            params = MultiYieldBalanceFetcher.Params(userWalletId = userWalletId, stakingIds = stakingIds),
-        )
-    }
-}

domain/tokens/src/main/kotlin/com/tangem/domain/tokens/FetchTokenListUseCase.kt

@@ -1,117 +0,0 @@
-package com.tangem.domain.tokens
-
-import arrow.core.Either
-import arrow.core.raise.Raise
-import arrow.core.raise.catch
-import arrow.core.raise.either
-import arrow.core.raise.ensureNotNull
-import arrow.core.toNonEmptyListOrNull
-import com.tangem.domain.models.currency.CryptoCurrency
-import com.tangem.domain.models.network.Network
-import com.tangem.domain.models.wallet.UserWalletId
-import com.tangem.domain.networks.multi.MultiNetworkStatusFetcher
-import com.tangem.domain.quotes.multi.MultiQuoteStatusFetcher
-import com.tangem.domain.staking.StakingIdFactory
-import com.tangem.domain.staking.multi.MultiYieldBalanceFetcher
-import com.tangem.domain.tokens.error.TokenListError
-import com.tangem.domain.tokens.repository.CurrenciesRepository
-import kotlinx.coroutines.async
-import kotlinx.coroutines.awaitAll
-import kotlinx.coroutines.coroutineScope
-
-/**
- * Use case responsible for fetching token list information, including currency data,
- * network statuses, and quotes for tokens associated with a user's wallet.
- *
- * @param currenciesRepository The repository for retrieving currency-related data.
- */
-class FetchTokenListUseCase(
-    private val currenciesRepository: CurrenciesRepository,
-    private val multiNetworkStatusFetcher: MultiNetworkStatusFetcher,
-    private val multiQuoteStatusFetcher: MultiQuoteStatusFetcher,
-    private val multiYieldBalanceFetcher: MultiYieldBalanceFetcher,
-    private val stakingIdFactory: StakingIdFactory,
-) {
-
-    /**
-     * Fetches the token list information for a user's wallet, including currency data,
-     * network statuses, and quotes for associated tokens.
-     *
-     * @param userWalletId The ID of the user's wallet.
-     * @return An [Either] representing success (Right) or an error (Left) in fetching the token list.
-     */
-    suspend operator fun invoke(userWalletId: UserWalletId): Either<TokenListError, Unit> = either {
-        val currencies = fetchCurrencies(userWalletId)
-
-        invoke(userWalletId = userWalletId, currencies = currencies)
-    }
-
-    suspend operator fun invoke(
-        userWalletId: UserWalletId,
-        currencies: List<CryptoCurrency>,
-    ): Either<TokenListError, Unit> = either {
-        coroutineScope {
-            val fetchStatuses = async {
-                fetchNetworksStatuses(
-                    userWalletId = userWalletId,
-                    networks = currencies.mapTo(hashSetOf()) { it.network },
-                )
-            }
-            val fetchQuotes = async {
-                fetchQuotes(
-                    currenciesIds = currencies.mapTo(hashSetOf()) { it.id },
-                )
-            }
-
-            val yieldBalances = async {
-                fetchYieldBalances(userWalletId = userWalletId, currencies = currencies)
-            }
-
-            awaitAll(fetchStatuses, fetchQuotes, yieldBalances)
-        }
-    }
-
-    private suspend fun Raise<TokenListError>.fetchCurrencies(userWalletId: UserWalletId): List<CryptoCurrency> {
-        val currencies = catch(
-            block = { currenciesRepository.getMultiCurrencyWalletCurrenciesSync(userWalletId, true) },
-        ) {
-            raise(TokenListError.DataError(it))
-        }
-
-        return ensureNotNull(currencies.toNonEmptyListOrNull()) {
-            TokenListError.EmptyTokens
-        }
-    }
-
-    private suspend fun Raise<TokenListError>.fetchNetworksStatuses(
-        userWalletId: UserWalletId,
-        networks: Set<Network>,
-    ) {
-        multiNetworkStatusFetcher(
-            params = MultiNetworkStatusFetcher.Params(userWalletId = userWalletId, networks = networks),
-        )
-            .mapLeft(TokenListError::DataError)
-            .bind()
-    }
-
-    private suspend fun Raise<TokenListError>.fetchQuotes(currenciesIds: Set<CryptoCurrency.ID>) {
-        multiQuoteStatusFetcher(
-            params = MultiQuoteStatusFetcher.Params(
-                currenciesIds = currenciesIds.mapNotNull { it.rawCurrencyId }.toSet(),
-                appCurrencyId = null,
-            ),
-        )
-            .mapLeft(TokenListError::DataError)
-            .bind()
-    }
-
-    private suspend fun fetchYieldBalances(userWalletId: UserWalletId, currencies: List<CryptoCurrency>) {
-        val stakingIds = currencies.mapNotNullTo(hashSetOf()) {
-            stakingIdFactory.create(userWalletId = userWalletId, cryptoCurrency = it).getOrNull()
-        }
-
-        multiYieldBalanceFetcher(
-            params = MultiYieldBalanceFetcher.Params(userWalletId = userWalletId, stakingIds = stakingIds),
-        )
-    }
-}