Updated on 2026-08-14

domain/wallets/src/main/java/com/tangem/domain/wallets/models/GetSelectedWalletError.kt

@@ -0,0 +1,8 @@
+package com.tangem.domain.wallets.models
+
+sealed interface GetSelectedWalletError {
+
+    object DataError : GetSelectedWalletError
+
+    object NoUserWalletSelected : GetSelectedWalletError
+}

domain/wallets/src/main/java/com/tangem/domain/wallets/models/SelectWalletError.kt

@@ -0,0 +1,8 @@
+package com.tangem.domain.wallets.models
+
+sealed interface SelectWalletError {
+
+    object DataError : SelectWalletError
+
+    object UnableToSelectUserWallet : SelectWalletError
+}

domain/wallets/src/main/java/com/tangem/domain/wallets/usecase/GetSelectedWalletUseCase.kt

@@ -0,0 +1,32 @@
+package com.tangem.domain.wallets.usecase
+
+import arrow.core.Either
+import arrow.core.raise.either
+import arrow.core.raise.ensureNotNull
+import com.tangem.domain.wallets.legacy.WalletsStateHolder
+import com.tangem.domain.wallets.models.GetSelectedWalletError
+import com.tangem.domain.wallets.models.UserWallet
+
+/**
+ * Use case for getting selected wallet
+ *
+ * @property walletsStateHolder state holder for getting static initialized 'userWalletsListManager'
+ *
+[REDACTED_AUTHOR]
+ */
+class GetSelectedWalletUseCase(private val walletsStateHolder: WalletsStateHolder) {
+
+    operator fun invoke(): Either<GetSelectedWalletError, UserWallet> {
+        return either {
+            val userWalletsListManager = ensureNotNull(
+                value = walletsStateHolder.userWalletsListManager,
+                raise = { GetSelectedWalletError.DataError },
+            )
+
+            ensureNotNull(
+                value = userWalletsListManager.selectedUserWalletSync,
+                raise = { GetSelectedWalletError.NoUserWalletSelected },
+            )
+        }
+    }
+}

domain/wallets/src/main/java/com/tangem/domain/wallets/usecase/SelectWalletUseCase.kt

@@ -0,0 +1,37 @@
+package com.tangem.domain.wallets.usecase
+
+import arrow.core.Either
+import arrow.core.left
+import arrow.core.raise.either
+import arrow.core.raise.ensureNotNull
+import arrow.core.right
+import com.tangem.common.doOnFailure
+import com.tangem.common.doOnSuccess
+import com.tangem.domain.wallets.legacy.WalletsStateHolder
+import com.tangem.domain.wallets.models.SelectWalletError
+import com.tangem.domain.wallets.models.UserWalletId
+
+/**
+ * Use case for selecting wallet
+ *
+ * @property walletsStateHolder state holder for getting static initialized 'userWalletsListManager'
+ *
+[REDACTED_AUTHOR]
+ */
+class SelectWalletUseCase(private val walletsStateHolder: WalletsStateHolder) {
+
+    suspend operator fun invoke(userWalletId: UserWalletId): Either<SelectWalletError, Unit> {
+        return either {
+            val userWalletsListManager = ensureNotNull(
+                value = walletsStateHolder.userWalletsListManager,
+                raise = { SelectWalletError.DataError },
+            )
+
+            userWalletsListManager.select(userWalletId)
+                .doOnSuccess { return Unit.right() }
+                .doOnFailure { return SelectWalletError.UnableToSelectUserWallet.left() }
+
+            return Unit.right()
+        }
+    }
+}