RemoteConfig `-fetchAndActivateWithCompletionHandler:` reports `SuccessFetchedFromRemote` despite using cached data

[empowerMax]

Description

When RemoteConfig's fetchAndActivate's activation succeeds, it only examine the activation error when considering if the fetch status was
FIRRemoteConfigFetchAndActivateStatusSuccessUsingPreFetchedData or FIRRemoteConfigFetchAndActivateStatusSuccessFetchedFromRemote.

This means whenever we call fetchAndActivate, regardless of the fetch result, we can't distinguish if the data actually from the remote or not.

Reproducing the issue

Hey sorry but I don't want to provide a full example (where I'd need to wire it up to a Firebase project). I guess it'd look something like:

FirebaseApp.configure()
let remoteConfig = RemoteConfig.remoteConfig()
// Set some long ish fetch time in seconds
let remoteConfigSettings = RemoteConfigSettings()
remoteConfigSettings.minimumFetchInterval = 1000
remoteConfig.configSettings = remoteConfigSettings
remoteConfig.fetchAndActivate { status, _ in
    print(status.rawValue)
    remoteConfig.fetchAndActivate { status, _ in
        print(status.rawValue)
    }
}

This prints 0 and then 0, whereas I'd expect 0 and then 1
Recall that:

    case successFetchedFromRemote = 0
    /// The fetch and activate succeeded from already fetched but yet unexpired config data. You can
    /// control this using minimumFetchInterval property in FIRRemoteConfigSettings.
    case successUsingPreFetchedData = 1

Perhaps I'm holding it wrong! Let me know :)

Firebase SDK Version

10.13.0

Xcode Version

15.0

Installation Method

Swift Package Manager

Firebase Product(s)

Remote Config

Targeted Platforms

iOS, tvOS, watchOS, macOS

Relevant Log Output

[Firebase/Crashlytics] Version 10.13.0
10.13.0 - [FirebaseCore][I-COR000001] Configuring the default app.
10.13.0 - [FirebaseCore][I-COR000033] Data Collection flag is not set.
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseSessions][I-SES000000] Version 10.13.0. Expecting subscriptions from: [Crashlytics, Performance]
10.13.0 - [FirebasePerformance][I-PRF100001] Firebase Performance Monitoring is successfully initialized! In a minute, visit the Firebase console to view your data: ****
10.13.0 - [FirebasePerformance][I-PRF100001] Registering Sessions SDK subscription for session data
10.13.0 - [FirebaseSessions][I-SES000000] Registering Sessions SDK subscriber with name: Performance, data collection enabled: true
10.13.0 - [FirebasePerformance][I-PRF900002] Session Id changed - ****
10.13.0 - [FirebaseCrashlytics][I-CLS000000] [Crashlytics] Running on iOS Simulator (iPhone), 17.0.0 (23A344)
10.13.0 - [FirebaseCrashlytics][I-CLS000000] Registering Sessions SDK subscription for session data
10.13.0 - [FirebaseSessions][I-SES000000] Registering Sessions SDK subscriber with name: Crashlytics, data collection enabled: true
10.13.0 - [FirebaseCrashlytics][I-CLS000000] Session ID changed: ****
10.13.0 - [FirebaseCrashlytics][I-CLS000000] Root: ***
10.13.0 - [FirebaseCrashlytics][I-CLS000000] [Crashlytics:Crash:Reports:Event] Registered Firebase Analytics event listener to receive breadcrumb logs
10.13.0 - [FirebaseCrashlytics][I-CLS000000] Automatic data collection is enabled.
10.13.0 - [FirebaseCrashlytics][I-CLS000000] Unsent reports will be uploaded at startup
10.13.0 - [FirebaseRemoteConfig][I-RCN000062] Loading database at path ****/Library/Application Support/Google/RemoteConfig/RemoteConfig.sqlite3
10.13.0 - [FirebasePerformance][I-PRF100009] Logging network request trace - *****
10.13.0 - [FirebaseRemoteConfig][I-RCN000067] Successfully set configSettings. Minimum Fetch Interval:1000.000000, Fetch timeout:60.000000
10.13.0 - [FirebasePerformance][I-PRF300005] URL length exceeds limits, truncating recorded URL - *****
10.13.0 - [FirebasePerformance][I-PRF300005] URL length exceeds limits, truncating recorded URL - *****
10.13.0 - [FirebasePerformance][I-PRF100009] Setting attribute traceParentId to 731d85e92d56b17f on trace *****
10.13.0 - [FirebaseAnalytics][I-ACS024000] Debug mode is on
10.13.0 - [FirebaseAnalytics][I-ACS023007] Analytics v.10.13.0 started
10.13.0 - [FirebaseAnalytics][I-ACS023008] To disable debug logging set the following application argument: -noFIRAnalyticsDebugEnabled (see http://goo.gl/RfcP7r)
10.13.0 - [FirebaseAnalytics][I-ACS023009] Debug logging enabled
10.13.0 - [FirebaseAnalytics][I-ACS023207] To enable verbose logging set the following application argument: -FIRAnalyticsVerboseLoggingEnabled (see http://goo.gl/RfcP7r)
10.13.0 - [FirebaseRemoteConfig][I-RCN000051] Returning cached data.
10.13.0 - [FirebasePerformance][I-PRF100009] Setting attribute traceParentId to 731d85e92d56b17f on trace remote_config_fetch_from_network
10.13.0 - [FirebaseAnalytics][I-ACS002002] APMExperimentAlarm scheduled to fire in approx. (s): 4432.630842924118
10.13.0 - [FirebaseAnalytics][I-ACS800023] No pending snapshot to activate. SDK name: app_measurement
10.13.0 - [FirebaseAnalytics][I-ACS029014] Successfully parsed a configuration. Version: 1692835047615698
10.13.0 - [FirebaseAnalytics][I-ACS023016] Analytics is ready to receive events
10.13.0 - [FirebaseRemoteConfig][I-RCN000069] Most recently fetched config is already activated.
Finished firebase fetch)
10.13.0 - [FirebasePerformance][I-PRF100009] Incrementing metric _fsapc to 0 on trace _fs
10.13.0 - [FirebasePerformance][I-PRF100009] Logging trace metric - _as 3639.7060ms. In a minute, visit the Firebase console to view your data: *****
10.13.0 - [FirebasePerformance][I-PRF300005] URL length exceeds limits, truncating recorded URL - ****
10.13.0 - [FirebasePerformance][I-PRF100009] Logging trace metric - remote_config_fetch_from_network 240.3780ms. In a minute, visit the Firebase console to view your data: ****
10.13.0 - [FirebasePerformance][I-PRF100009] Logging trace metric - _fs 150.6890ms. In a minute, visit the Firebase console to view your data: ****
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseSessions][I-SES000000] Data Collection is enabled for at least one Subscriber
10.13.0 - [FirebaseSessions][I-SES000000] [Settings] Cache is not expired, no fetch will be made.
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseAnalytics][I-ACS032014] AdServices framework is not linked. Search Ad Attribution Reporter is disabled.
10.13.0 - [FirebaseAnalytics][I-ACS002002] Measurement timer scheduled to fire in approx. (s): -495.5942499637604
10.13.0 - [FirebaseAnalytics][I-ACS002002] Engagement timer scheduled to fire in approx. (s): 3600
10.13.0 - [FirebaseAnalytics][I-ACS023012] Analytics collection enabled
10.13.0 - [FirebaseAnalytics][I-ACS023220] Analytics screen reporting is enabled. Call Analytics.logEvent(AnalyticsEventScreenView, parameters: [...]) to log a screen view event. To disable automatic screen reporting, set the flag FirebaseAutomaticScreenReportingEnabled to NO (boolean) in the Info.plist
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseSessions][I-SES000000] Logging events using fast QOS due to running on a simulator
10.13.0 - [FirebaseSessions][I-SES000000] Successfully logged Session Start event to GoogleDataTransport
10.13.0 - [FirebaseSessions][I-SES000000] Successfully logged Session Start event
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseAnalytics][I-ACS002001] Measurement timer fired
10.13.0 - [FirebaseAnalytics][I-ACS002003] Measurement timer canceled
10.13.0 - [FirebaseAnalytics][I-ACS023087] User property set. Name, value: lifetime_user_engagement (_lte), 1329151
10.13.0 - [FirebaseAnalytics][I-ACS023087] User property set. Name, value: session_user_engagement (_se), 440747
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseAnalytics][I-ACS012018] Saving bundle. size (bytes): 465
10.13.0 - [FirebaseAnalytics][I-ACS023116] Bundle added to the upload queue. BundleID, timestamp (ms): 60, 1696476706676
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseAnalytics][I-ACS012018] Saving bundle. size (bytes): 475
10.13.0 - [FirebaseAnalytics][I-ACS023116] Bundle added to the upload queue. BundleID, timestamp (ms): 61, 1696477202934
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseAnalytics][I-ACS023039] Measurement data sent to network. Timestamp (ms), data: 1696477204250, <APMPBMeasurementBatch: 0x600000025160>
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseAnalytics][I-ACS023044] Successful upload. Got network response. Code, size: 204, -1
10.13.0 - [FirebaseAnalytics][I-ACS002002] Measurement timer scheduled to fire in approx. (s): -0.9895179271697998
10.13.0 - [FirebaseAnalytics][I-ACS002003] Measurement timer canceled
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002000] -[FIRInstallationsIDController createGetInstallationItemPromise], appName: __FIRAPP_DEFAULT
10.13.0 - [FirebaseInstallations][I-FIS002001] -[FIRInstallationsIDController installationWithValidAuthTokenForcingRefresh:0], appName: __FIRAPP_DEFAULT

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[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[adamsousa]

Any updates on this? Encountering this issue as well.

[mandeep-vestel]

I am also facing this issue. Is there any update on this?
Firebase version 10.29.0(SPM)