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Devices that download an OTA APK but cannot silently install it (Fire TV: no device-owner path) re-downloaded the full APK every check cycle indefinitely - install never completes, version never advances, next check re-triggers. Client (UpdateChecker.kt, ServerConfig.kt, OtaThrottle.kt): - Reuse a cached, signature-verified APK instead of re-downloading every cycle; delete leftover invalid files; keep the verified APK on disk as the manual-install artifact. - Persisted per-version attempt budget (EncryptedSharedPreferences) so it survives the Fire OS app restarts that drive the loop. An attempt is counted only when an install is launched - a download/verify failure does not consume the budget, so a transient network problem cannot park a healthy device in backoff. After 3 failed installs, back off to one retry per 24h. - Clear OTA state and caches when a check returns update_available=false while state is pending (app relaunched as the new version). - Report OTA status to the dashboard via device:log (tag ota) on state transitions only (enter-backoff, clear) to avoid flooding the channel. - Extract throttle decision logic into a pure OtaThrottle object (no Android deps) with JUnit coverage (OtaThrottleTest) for the state transitions. Server (server.js): - Reword /download/apk log from "OTA update in progress" to "APK served" and rate-limit to once per IP / 10 min so a looping device cannot flood the log. Note: client-cooperative fix - prevents the loop in cohorts running this APK. Currently-stuck beta4 devices still require a one-time manual update. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
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