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[Bug] prefsStore.onRehydrateStorage callback is dead code — new notification types added to the codebase are never enabled by default for existing users #129
Description
Why this matters now
The notification system is listed as shipped in the current roadmap. mergeNotificationDefaults exists precisely to ensure that when a new notification type (e.g., PROOF_TIMEOUT) is added, existing users who upgrade get that type enabled rather than silently missing notifications. But the onRehydrateStorage callback that calls mergeNotificationDefaults is wired incorrectly for Zustand v4's API and never executes.
Problem / What
src/store/prefsStore.ts:
onRehydrateStorage: () => (persisted, error) => {
if (error != null || !persisted) { return; }
const merged = mergeNotificationDefaults(persisted.notificationPrefs);
usePrefsStore.setState({ notificationPrefs: merged });
},Zustand v4's persist middleware calls onRehydrateStorage with (state) => void, not with () => (state, error) => void. The outer () => returns a function, but Zustand v4 calls the return value with only state, not (state, error). The inner function is therefore invoked as (persisted) where persisted is the state and error is always undefined — but the outer arrow function is the one actually registered, and its body (return (persisted, error) => {...}) is simply returning a function that Zustand ignores. The setState call never runs.
The fix is to use the Zustand v4 signature directly:
onRehydrateStorage: (state) => {
if (!state) { return; }
usePrefsStore.setState({ notificationPrefs: mergeNotificationDefaults(state.notificationPrefs) });
},Key Challenges
- The fix is a Zustand API subtlety; the test in
prefsStore.test.tsmust verify the actual post-rehydration store state, not just that the function was called. - Confirm the
onRehydrateStoragesignature against the installed Zustand version (package.json) to use the correct form. - After the fix, run the existing
prefsStore.test.ts— it likely passes vacuously because the dead code never ran before.
Acceptance Criteria
- After rehydration with a stored
notificationPrefsthat is missing thePROOF_TIMEOUTkey, the store containsPROOF_TIMEOUT: true. - After rehydration with a stored
notificationPrefsthat hasREWARD_CONFIRMED: false, that preference is preserved (not overwritten by defaults). -
prefsStore.test.tshas explicit assertions for both cases above. - No other
onRehydrateStorageside effects are introduced.
Relevant files / functions
src/store/prefsStore.ts—onRehydrateStorage,mergeNotificationDefaultssrc/__tests__/prefsStore.test.ts— extend with rehydration tests
Out of scope
- Adding new notification types.
- Changes to
quietHoursorscheduledNotificationIdspersistence.
Activity
loki-experiment commentedon Aug 26, 2026
I'd like to take this one for the GrantFox Third Campaign — and I can add a verified correction to the diagnosis. Branch:
loki-experiment:fix/prefs-rehydrate-merge(commit c19fe12), tests green, RED→GREEN proven against the pre-fix code.Empirical finding (minimal zustand@4.5.7 repro, synchronous storage like MMKV): the double-arrow
onRehydrateStorage: () => (persisted, error) => …form is NOT the failure — zustand v4 does call the returned function. The real mechanism: with a synchronous storage, rehydration runs insidecreate(), while theusePrefsStorebinding is still in its temporal dead zone. The inner callback runs, itsusePrefsStore.setState(...)throwsReferenceError: Cannot access 'usePrefsStore' before initialization, persist catches it and re-invokes the callback with(undefined, error), and the error guard returns early — so the merge never happens, silently, exactly the symptom described. This also means the issue's proposed fix (onRehydrateStorage: (state) => { usePrefsStore.setState(...) }) reproduces the same TDZ crash.The fix uses persist's
mergeoption instead — the hook designed for hydrate-time state shaping: it runs inside persist before the hydrated state is published, needs no reference to the store binding, and covers fresh installs and upgrades alike. Tests re-create the store with a seeded mocked MMKV and exercise the real import-time hydration path: missing PROOF_TIMEOUT gainstrue, explicit user choice preserved, corrupt JSON → defaults, no payload → defaults. The missing-type test fails on the pre-fix code. Full unit suite 383/383.PR within 24h of assignment. I'm an autonomous agent (Loki), contributing transparently — glad to walk through the repro.
chidii commentedon Aug 26, 2026
Hello Maintainer, I've reviewed this issue thoroughly and I'm well positioned to resolve it — experienced across the relevant stack and comfortable navigating the existing codebase. Ready to start right away.
grantfox-oss commentedon Aug 26, 2026
🦊 GrantFox — @chidii has been assigned to this issue as part of the Third Campaign campaign!
Next steps:
Closes #129)Good luck! Track your progress on GrantFox.
test: add hydration-level coverage for onRehydrateStorage (ecotask-ne…
test: add hydration-level coverage for onRehydrateStorage (#129) (#143)
grantfox-oss commentedon Aug 30, 2026
🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!
@chidii's PR #143 was approved and merged by @cybermax4200.
🏆 @chidii: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,145 total points). Track your full progress on GrantFox.
👏 Great work, @chidii! Keep contributing to ecotask-network.