Updated on 2026-08-14

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

@@ -1,22 +1,34 @@
 package com.tangem.tap.di.domain
 
+import com.tangem.domain.appcurrency.GetAvailableCurrenciesUseCase
 import com.tangem.domain.appcurrency.GetSelectedAppCurrencyUseCase
+import com.tangem.domain.appcurrency.SelectAppCurrencyUseCase
 import com.tangem.domain.appcurrency.repository.AppCurrencyRepository
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.android.components.ViewModelComponent
-import dagger.hilt.android.scopes.ViewModelScoped
 
 @Module
 @InstallIn(ViewModelComponent::class)
 internal object AppCurrencyDomainModule {
 
     @Provides
-    @ViewModelScoped
     fun provideGetSelectedAppCurrencyUseCase(
         appCurrencyRepository: AppCurrencyRepository,
     ): GetSelectedAppCurrencyUseCase {
         return GetSelectedAppCurrencyUseCase(appCurrencyRepository)
     }
+
+    @Provides
+    fun provideSelectAppCurrencyUseCase(appCurrencyRepository: AppCurrencyRepository): SelectAppCurrencyUseCase {
+        return SelectAppCurrencyUseCase(appCurrencyRepository)
+    }
+
+    @Provides
+    fun provideGetAvailableCurrenciesUseCase(
+        appCurrencyRepository: AppCurrencyRepository,
+    ): GetAvailableCurrenciesUseCase {
+        return GetAvailableCurrenciesUseCase(appCurrencyRepository)
+    }
 }

data/app-currency/src/main/kotlin/com/tangem/data/appcurrency/DefaultAppCurrencyRepository.kt

@@ -88,6 +88,8 @@ internal class DefaultAppCurrencyRepository(
             Timber.e(e, "Unable to fetch available currencies")
 
             availableAppCurrenciesStore.store(getDefaultCurrenciesResponse())
+
+            throw e
         }
     }
 

domain/app-currency/src/main/kotlin/com/tangem/domain/appcurrency/GetAvailableCurrenciesUseCase.kt

@@ -0,0 +1,27 @@
+package com.tangem.domain.appcurrency
+
+import arrow.core.Either
+import arrow.core.NonEmptyList
+import arrow.core.raise.catch
+import arrow.core.raise.either
+import arrow.core.raise.ensureNotNull
+import arrow.core.toNonEmptyListOrNull
+import com.tangem.domain.appcurrency.error.AvailableCurrenciesError
+import com.tangem.domain.appcurrency.model.AppCurrency
+import com.tangem.domain.appcurrency.repository.AppCurrencyRepository
+
+// TODO: Add tests
+class GetAvailableCurrenciesUseCase(
+    private val appCurrencyRepository: AppCurrencyRepository,
+) {
+
+    suspend operator fun invoke(): Either<AvailableCurrenciesError, NonEmptyList<AppCurrency>> = either {
+        val currencies = catch({ appCurrencyRepository.getAvailableAppCurrencies() }) {
+            raise(AvailableCurrenciesError.DataError(it))
+        }
+
+        ensureNotNull(currencies.toNonEmptyListOrNull()) {
+            AvailableCurrenciesError.CurrenciesIsEmpty
+        }
+    }
+}

domain/app-currency/src/main/kotlin/com/tangem/domain/appcurrency/SelectAppCurrencyUseCase.kt

@@ -0,0 +1,14 @@
+package com.tangem.domain.appcurrency
+
+import arrow.core.Either
+import com.tangem.domain.appcurrency.repository.AppCurrencyRepository
+
+// TODO: Add tests
+class SelectAppCurrencyUseCase(
+    private val appCurrencyRepository: AppCurrencyRepository,
+) {
+
+    suspend operator fun invoke(currencyCode: String): Either<Throwable, Unit> {
+        return Either.catch { appCurrencyRepository.changeAppCurrency(currencyCode) }
+    }
+}

domain/app-currency/src/main/kotlin/com/tangem/domain/appcurrency/error/AvailableCurrenciesError.kt

@@ -0,0 +1,8 @@
+package com.tangem.domain.appcurrency.error
+
+sealed class AvailableCurrenciesError {
+
+    object CurrenciesIsEmpty : AvailableCurrenciesError()
+
+    data class DataError(val cause: Throwable) : AvailableCurrenciesError()
+}