Updated on 2026-08-14

data/networks/src/main/java/com/tangem/data/networks/fetcher/CommonNetworkStatusFetcher.kt

@@ -1,6 +1,7 @@
 package com.tangem.data.networks.fetcher
 
 import arrow.core.Either
+import arrow.core.right
 import com.tangem.data.networks.store.NetworksStatusesStore
 import com.tangem.data.networks.store.setSourceAsOnlyCache
 import com.tangem.data.networks.store.storeStatus
@@ -44,6 +45,13 @@ internal class CommonNetworkStatusFetcher @Inject constructor(
         network: Network,
         networkCurrencies: Set<CryptoCurrency>,
     ): Either<Throwable, Unit> {
+        // Guard: empty networkCurrencies would result in NetworkStatus.Verified(amounts=emptyMap()),
+        // which overwrites any valid cached status and leaves all currencies in this network as Loading.
+        if (networkCurrencies.isEmpty()) {
+            TangemLogger.w("Skipping fetch for $userWalletId [${network.rawId}]: networkCurrencies is empty")
+            return Unit.right()
+        }
+
         return Either.catchOn(dispatchers.default) {
             val result = withContext(dispatchers.io) {
                 walletManagersFacade.update(

data/networks/src/test/java/com/tangem/data/networks/fetcher/CommonNetworkStatusFetcherTest.kt

@@ -73,6 +73,32 @@ internal class CommonNetworkStatusFetcherTest {
         }
     }
 
+    @Test
+    fun `fetch skips wallet manager update when networkCurrencies is empty`() = runTest {
+        // Arrange
+        val userWalletId = UserWalletId("011")
+        val network = cryptoCurrencyFactory.ethereum.network
+
+        // Act
+        val actual = fetcher.fetch(
+            userWalletId = userWalletId,
+            network = network,
+            networkCurrencies = emptySet(),
+        )
+
+        // Assert: returns success without touching the wallet manager facade — guard prevents storing
+        // a NetworkStatus.Verified with empty `amounts` over an existing valid cached status.
+        Truth.assertThat(actual).isEqualTo(Either.Right(Unit))
+
+        coVerify(inverse = true) {
+            walletManagersFacade.update(
+                userWalletId = any(),
+                network = any(),
+                extraTokens = any(),
+            )
+        }
+    }
+
     @ParameterizedTest
     @ProvideTestModels
     fun `fetch successfully for any result of walletManagersFacade`(model: SuccessTestModel) = runTest {