Updated on 2026-08-14

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()
+}