fix(expo): serialize iOS lifecycle cleanup - #335
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Scope StoreKit listener teardown to the module generation that created it. Wait for an in-flight connection cleanup before reconnecting, and avoid retaining standard or Onside modules through their stored lifecycle definitions. Closes #334
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📝 WalkthroughWalkthroughThe iOS StoreKit lifecycle now uses generation-scoped listener cleanup, tracked asynchronous connection termination, awaited cleanup before reconnection, and weakly captured lifecycle tasks. Jest tests cover these lifecycle safeguards. ChangesiOS StoreKit lifecycle
Estimated code review effort: 3 (Moderate) | ~20 minutes Mergeability Score: 🟡 Moderate · up to Lifecycle cleanup may still replace the tracked cleanup task, allowing a new connection to start while an earlier connection is ending; this can leave iOS connection state inconsistent, so the PR is not fully merge-ready until the race is fixed or explicitly accepted. Sequence Diagram(s)sequenceDiagram
participant ModuleLifecycle
participant ExpoIapHelper
participant StoreKit
ModuleLifecycle->>ExpoIapHelper: setupStore()
ExpoIapHelper->>StoreKit: register listeners
ExpoIapHelper-->>ModuleLifecycle: listener generation
ModuleLifecycle->>ExpoIapHelper: cleanupStore(generation)
ExpoIapHelper->>StoreKit: remove listeners
ExpoIapHelper->>StoreKit: end connection asynchronously
ModuleLifecycle->>ExpoIapHelper: waitForStoreCleanup()
ModuleLifecycle->>StoreKit: initConnection()
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #335 +/- ##
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Coverage 72.16% 72.16%
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Files 135 135
Lines 14472 14472
Branches 4043 4043
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Inline comments:
In `@libraries/expo-iap/ios/ExpoIapHelper.swift`:
- Around line 244-272: Update beginStoreCleanup to chain each new cleanup Task
after the existing pendingConnectionCleanup task, awaiting the prior task before
calling OpenIapModule.shared.endConnection(). Preserve generation tracking and
ensure pendingConnectionCleanupTask continues to represent the full serialized
cleanup chain.
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📒 Files selected for processing (4)
libraries/expo-iap/ios/ExpoIapHelper.swiftlibraries/expo-iap/ios/ExpoIapModule.swiftlibraries/expo-iap/ios/onside/OnsideIapModule.swiftlibraries/expo-iap/src/__tests__/ios-module-lifecycle.test.js
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Summary
Closes #334
Root cause
ExpoIapHelperowns process-wide listener tokens, but lifecycle teardown had no module ownership. BecauseOnCreateandOnDestroydispatch unstructured main-actor tasks, an old module teardown could run after a replacement module installed its listeners and clear the replacement state or end its shared connection. The strong-capture theory in the report does not by itself imply use-after-free—a strong task capture keeps the instance alive—but the stored lifecycle closures and unowned global teardown made module replacement unsafe.The fix assigns each listener installation a generation, ignores stale teardown, records connection cleanup as a pending task, and makes
initConnectionwait for that task. The terminal destroy task retains only the instance needed to finish its own cleanup.Test plan
bun run testinlibraries/expo-iap(520 tests)bun run testinlibraries/expo-iap/example(134 tests)bun run lint:tscbun run lint(0 errors; 5 existing warnings in untouched code)bun audit:parityExpoIappodPreview
Not applicable: this changes native lifecycle synchronization and has no visual surface. The two simulator builds above exercise the standard StoreKit and Onside compilation paths.
Summary by CodeRabbit
Bug Fixes
Tests