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FA-34621 / Notification interfaces / Open access

Inbox optimistic archive rollback: restore-failure from restoring · case 01

The restore-failure event leaves a notification in row-visible instead of restore-error.

Verified by executionVariant 1 · 37 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Failed restoration still presents a usable row.

THE FAILURE

Failed restoration still presents a usable row.

Unsuccessful approach: Silently keeping archived state removes the retry affordance.

Case contract

Inbox optimistic archive rollback is a bounded visual-notification workflow with mutable policy state {'row': {'revision': 1, 'text': 'old'}, 'saved': None, 'visible': True}. Its default transition relation is {('row-visible', 'archive-click'): 'optimistically-hidden', ('optimistically-hidden', 'archive-success'): 'archived', ('optimistically-hidden', 'archive-failure'): 'restored-error', ('restored-error', 'retry-archive'): 'optimistically-hidden', ('archived', 'restore-click'): 'restoring', ('restoring', 'restore-success'): 'row-visible', ('restoring', 'restore-failure'): 'restore-error', ('restore-error', 'retry-restore'): 'restoring', ('optimistically-hidden', 'new-revision-arrives'): 'hidden-new-revision', ('hidden-new-revision', 'archive-failure'): 'restored-new-revision-error'}; domain inputs can suppress or redirect transitions and update policy fields, as specified in solve. Different-generation events are inert. Batches apply in order. Optional observe returns the selected policy field alongside the phase.

Why this case matters

Visual notification lifecycle ordering can leave an inbox or toast showing the wrong actionable state even when transport succeeds.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(initial, events, generation, payload=None, observe=None):
    table = {('row-visible', 'archive-click'): 'optimistically-hidden', ('optimistically-hidden', 'archive-success'): 'archived', ('optimistically-hidden', 'archive-failure'): 'restored-error', ('restored-error', 'retry-archive'): 'optimistically-hidden', ('archived', 'restore-click'): 'restoring', ('restoring', 'restore-success'): 'row-visible', ('restoring', 'restore-failure'): 'row-visible', ('restore-error', 'retry-restore'): 'restoring', ('optimistically-hidden', 'new-revision-arrives'): 'hidden-new-revision', ('hidden-new-revision', 'archive-failure'): 'restored-new-revision-error'}
    data = json.loads(json.dumps({'row': {'revision': 1, 'text': 'old'}, 'saved': None, 'visible': True})) if payload is None else {**json.loads(json.dumps({'row': {'revision': 1, 'text': 'old'}, 'saved': None, 'visible': True})), **json.loads(json.dumps(payload))}
    state = initial
    for delivery in events:
        event, event_generation = delivery[:2]
        arg = delivery[2] if len(delivery) > 2 else {}
        if event_generation == generation:
            previous = state
            if event == 'archive-click': data['saved'] = dict(data['row'])
            if event == 'new-revision-arrives':
                revision = arg.get('revision',data['row']['revision']+1)
                if revision <= data['row']['revision']: event = 'unknown-event'
                else: data['row'] = {'revision':revision,'text':arg.get('text','new')}
            state = table.get((state, event), state)
            if state in ('archived','optimistically-hidden','hidden-new-revision','restore-error','restoring'): data['visible'] = False
            if state in ('row-visible','restored-error','restored-new-revision-error'): data['visible'] = True
            if state == 'restored-error' and data['saved'] is not None: data['row'] = dict(data['saved'])
    return {'phase': state, 'value': data[observe]} if observe else state
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('row-visible / archive-click', solve('row-visible', [('archive-click', N)], N), 'optimistically-hidden')
check('optimistically-hidden / archive-success', solve('optimistically-hidden', [('archive-success', N)], N), 'archived')
check('optimistically-hidden / archive-failure', solve('optimistically-hidden', [('archive-failure', N)], N), 'restored-error')
check('restored-error / retry-archive', solve('restored-error', [('retry-archive', N)], N), 'optimistically-hidden')
check('archived / restore-click', solve('archived', [('restore-click', N)], N), 'restoring')
check('restoring / restore-success', solve('restoring', [('restore-success', N)], N), 'row-visible')
check('restoring / restore-failure', solve('restoring', [('restore-failure', N)], N), 'restore-error')
check('restore-error / retry-restore', solve('restore-error', [('retry-restore', N)], N), 'restoring')
check('optimistically-hidden / new-revision-arrives', solve('optimistically-hidden', [('new-revision-arrives', N)], N), 'hidden-new-revision')
check('hidden-new-revision / archive-failure', solve('hidden-new-revision', [('archive-failure', N)], N), 'restored-new-revision-error')
check('older notification incarnation', solve('row-visible', [('archive-click', N - 1)], N), 'row-visible')
check('future notification incarnation', solve('row-visible', [('archive-click', N + 1)], N), 'row-visible')
check('unknown event is inert', solve('row-visible', [('unknown-event', N)], N), 'row-visible')
check('empty delivery batch', solve('row-visible', [], N), 'row-visible')
check('N stale deliveries before current delivery', solve('row-visible', [('archive-click', N - 1)] * N + [('archive-click', N)], N), 'optimistically-hidden')
check('trace archive-click then archive-success', solve('row-visible', [('archive-click', N), ('archive-success', N)], N), 'archived')
check('trace archive-click then archive-failure', solve('row-visible', [('archive-click', N), ('archive-failure', N)], N), 'restored-error')
check('trace archive-click then new-revision-arrives', solve('row-visible', [('archive-click', N), ('new-revision-arrives', N)], N), 'hidden-new-revision')
check('trace archive-success then restore-click', solve('optimistically-hidden', [('archive-success', N), ('restore-click', N)], N), 'restoring')
check('trace archive-failure then retry-archive', solve('optimistically-hidden', [('archive-failure', N), ('retry-archive', N)], N), 'optimistically-hidden')
check('trace retry-archive then archive-success', solve('restored-error', [('retry-archive', N), ('archive-success', N)], N), 'archived')
check('trace retry-archive then archive-failure', solve('restored-error', [('retry-archive', N), ('archive-failure', N)], N), 'restored-error')
check('trace retry-archive then new-revision-arrives', solve('restored-error', [('retry-archive', N), ('new-revision-arrives', N)], N), 'hidden-new-revision')
check('trace restore-click then restore-success', solve('archived', [('restore-click', N), ('restore-success', N)], N), 'row-visible')
check('trace restore-click then restore-failure', solve('archived', [('restore-click', N), ('restore-failure', N)], N), 'restore-error')
check('trace restore-success then archive-click', solve('restoring', [('restore-success', N), ('archive-click', N)], N), 'optimistically-hidden')
check('trace restore-failure then retry-restore', solve('restoring', [('restore-failure', N), ('retry-restore', N)], N), 'restoring')
check('trace retry-restore then restore-success', solve('restore-error', [('retry-restore', N), ('restore-success', N)], N), 'row-visible')
check('trace retry-restore then restore-failure', solve('restore-error', [('retry-restore', N), ('restore-failure', N)], N), 'restore-error')
check('trace new-revision-arrives then archive-failure', solve('optimistically-hidden', [('new-revision-arrives', N), ('archive-failure', N)], N), 'restored-new-revision-error')
check('domain state regression 1: saved', solve('row-visible', [('archive-click', N, {})], N, {}, 'saved'), {'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}})
check('domain state regression 2: row', solve('optimistically-hidden', [('new-revision-arrives', N, {'revision': 1, 'text': 'stale'})], N, {}, 'row'), {'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}})
check('domain state regression 3: visible', solve('optimistically-hidden', [('new-revision-arrives', N, {'revision': 2, 'text': 'new'})], N, {}, 'visible'), {'phase': 'hidden-new-revision', 'value': False})
check('domain state regression 4: row', solve('hidden-new-revision', [('archive-failure', N, {})], N, {'row': {'revision': 2, 'text': 'new'}, 'saved': {'revision': 1, 'text': 'old'}}, 'row'), {'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}})
check('domain state regression 5: row', solve('optimistically-hidden', [('archive-failure', N, {})], N, {'saved': {'revision': 1, 'text': 'original'}}, 'row'), {'phase': 'restored-error', 'value': {'revision': 1, 'text': 'original'}})
check('domain state regression 6: visible', solve('restoring', [('restore-failure', N, {})], N, {}, 'visible'), {'phase': 'restore-error', 'value': False})
check('domain state regression 7: row', solve('row-visible', [('archive-click', N, {}), ('new-revision-arrives', N, {'revision': 2, 'text': 'new'}), ('archive-failure', N, {})], N, {}, 'row'), {'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
row-visible / archive-clickoptimistically-hiddenoptimistically-hiddenPassed
optimistically-hidden / archive-successarchivedarchivedPassed
optimistically-hidden / archive-failurerestored-errorrestored-errorPassed
restored-error / retry-archiveoptimistically-hiddenoptimistically-hiddenPassed
archived / restore-clickrestoringrestoringPassed
restoring / restore-successrow-visiblerow-visiblePassed
restoring / restore-failurerow-visiblerestore-errorFailed
restore-error / retry-restorerestoringrestoringPassed
optimistically-hidden / new-revision-arriveshidden-new-revisionhidden-new-revisionPassed
hidden-new-revision / archive-failurerestored-new-revision-errorrestored-new-revision-errorPassed
older notification incarnationrow-visiblerow-visiblePassed
future notification incarnationrow-visiblerow-visiblePassed
unknown event is inertrow-visiblerow-visiblePassed
empty delivery batchrow-visiblerow-visiblePassed
N stale deliveries before current deliveryoptimistically-hiddenoptimistically-hiddenPassed
trace archive-click then archive-successarchivedarchivedPassed
trace archive-click then archive-failurerestored-errorrestored-errorPassed
trace archive-click then new-revision-arriveshidden-new-revisionhidden-new-revisionPassed
trace archive-success then restore-clickrestoringrestoringPassed
trace archive-failure then retry-archiveoptimistically-hiddenoptimistically-hiddenPassed
trace retry-archive then archive-successarchivedarchivedPassed
trace retry-archive then archive-failurerestored-errorrestored-errorPassed
trace retry-archive then new-revision-arriveshidden-new-revisionhidden-new-revisionPassed
trace restore-click then restore-successrow-visiblerow-visiblePassed
trace restore-click then restore-failurerow-visiblerestore-errorFailed
trace restore-success then archive-clickoptimistically-hiddenoptimistically-hiddenPassed
trace restore-failure then retry-restorerow-visiblerestoringFailed
trace retry-restore then restore-successrow-visiblerow-visiblePassed
trace retry-restore then restore-failurerow-visiblerestore-errorFailed
trace new-revision-arrives then archive-failurerestored-new-revision-errorrestored-new-revision-errorPassed
domain state regression 1: saved{'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}}{'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}}Passed
domain state regression 2: row{'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}}{'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}}Passed
domain state regression 3: visible{'phase': 'hidden-new-revision', 'value': False}{'phase': 'hidden-new-revision', 'value': False}Passed
domain state regression 4: row{'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}}{'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}}Passed
domain state regression 5: row{'phase': 'restored-error', 'value': {'revision': 1, 'text': 'original'}}{'phase': 'restored-error', 'value': {'revision': 1, 'text': 'original'}}Passed
domain state regression 6: visible{'phase': 'row-visible', 'value': True}{'phase': 'restore-error', 'value': False}Failed
domain state regression 7: row{'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}}{'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}}Passed

SHA-256 / 4248c8e919d1c083ced858d1ec58706200682287a35a39cb7545dfd10d4e0497

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(initial, events, generation, payload=None, observe=None):
    table = {('row-visible', 'archive-click'): 'optimistically-hidden', ('optimistically-hidden', 'archive-success'): 'archived', ('optimistically-hidden', 'archive-failure'): 'restored-error', ('restored-error', 'retry-archive'): 'optimistically-hidden', ('archived', 'restore-click'): 'restoring', ('restoring', 'restore-success'): 'row-visible', ('restoring', 'restore-failure'): 'archived', ('restore-error', 'retry-restore'): 'restoring', ('optimistically-hidden', 'new-revision-arrives'): 'hidden-new-revision', ('hidden-new-revision', 'archive-failure'): 'restored-new-revision-error'}
    data = json.loads(json.dumps({'row': {'revision': 1, 'text': 'old'}, 'saved': None, 'visible': True})) if payload is None else {**json.loads(json.dumps({'row': {'revision': 1, 'text': 'old'}, 'saved': None, 'visible': True})), **json.loads(json.dumps(payload))}
    state = initial
    for delivery in events:
        event, event_generation = delivery[:2]
        arg = delivery[2] if len(delivery) > 2 else {}
        if event_generation == generation:
            previous = state
            if event == 'archive-click': data['saved'] = dict(data['row'])
            if event == 'new-revision-arrives':
                revision = arg.get('revision',data['row']['revision']+1)
                if revision <= data['row']['revision']: event = 'unknown-event'
                else: data['row'] = {'revision':revision,'text':arg.get('text','new')}
            state = table.get((state, event), state)
            if state in ('archived','optimistically-hidden','hidden-new-revision','restore-error','restoring'): data['visible'] = False
            if state in ('row-visible','restored-error','restored-new-revision-error'): data['visible'] = True
            if state == 'restored-error' and data['saved'] is not None: data['row'] = dict(data['saved'])
    return {'phase': state, 'value': data[observe]} if observe else state
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('row-visible / archive-click', solve('row-visible', [('archive-click', N)], N), 'optimistically-hidden')
check('optimistically-hidden / archive-success', solve('optimistically-hidden', [('archive-success', N)], N), 'archived')
check('optimistically-hidden / archive-failure', solve('optimistically-hidden', [('archive-failure', N)], N), 'restored-error')
check('restored-error / retry-archive', solve('restored-error', [('retry-archive', N)], N), 'optimistically-hidden')
check('archived / restore-click', solve('archived', [('restore-click', N)], N), 'restoring')
check('restoring / restore-success', solve('restoring', [('restore-success', N)], N), 'row-visible')
check('restoring / restore-failure', solve('restoring', [('restore-failure', N)], N), 'restore-error')
check('restore-error / retry-restore', solve('restore-error', [('retry-restore', N)], N), 'restoring')
check('optimistically-hidden / new-revision-arrives', solve('optimistically-hidden', [('new-revision-arrives', N)], N), 'hidden-new-revision')
check('hidden-new-revision / archive-failure', solve('hidden-new-revision', [('archive-failure', N)], N), 'restored-new-revision-error')
check('older notification incarnation', solve('row-visible', [('archive-click', N - 1)], N), 'row-visible')
check('future notification incarnation', solve('row-visible', [('archive-click', N + 1)], N), 'row-visible')
check('unknown event is inert', solve('row-visible', [('unknown-event', N)], N), 'row-visible')
check('empty delivery batch', solve('row-visible', [], N), 'row-visible')
check('N stale deliveries before current delivery', solve('row-visible', [('archive-click', N - 1)] * N + [('archive-click', N)], N), 'optimistically-hidden')
check('trace archive-click then archive-success', solve('row-visible', [('archive-click', N), ('archive-success', N)], N), 'archived')
check('trace archive-click then archive-failure', solve('row-visible', [('archive-click', N), ('archive-failure', N)], N), 'restored-error')
check('trace archive-click then new-revision-arrives', solve('row-visible', [('archive-click', N), ('new-revision-arrives', N)], N), 'hidden-new-revision')
check('trace archive-success then restore-click', solve('optimistically-hidden', [('archive-success', N), ('restore-click', N)], N), 'restoring')
check('trace archive-failure then retry-archive', solve('optimistically-hidden', [('archive-failure', N), ('retry-archive', N)], N), 'optimistically-hidden')
check('trace retry-archive then archive-success', solve('restored-error', [('retry-archive', N), ('archive-success', N)], N), 'archived')
check('trace retry-archive then archive-failure', solve('restored-error', [('retry-archive', N), ('archive-failure', N)], N), 'restored-error')
check('trace retry-archive then new-revision-arrives', solve('restored-error', [('retry-archive', N), ('new-revision-arrives', N)], N), 'hidden-new-revision')
check('trace restore-click then restore-success', solve('archived', [('restore-click', N), ('restore-success', N)], N), 'row-visible')
check('trace restore-click then restore-failure', solve('archived', [('restore-click', N), ('restore-failure', N)], N), 'restore-error')
check('trace restore-success then archive-click', solve('restoring', [('restore-success', N), ('archive-click', N)], N), 'optimistically-hidden')
check('trace restore-failure then retry-restore', solve('restoring', [('restore-failure', N), ('retry-restore', N)], N), 'restoring')
check('trace retry-restore then restore-success', solve('restore-error', [('retry-restore', N), ('restore-success', N)], N), 'row-visible')
check('trace retry-restore then restore-failure', solve('restore-error', [('retry-restore', N), ('restore-failure', N)], N), 'restore-error')
check('trace new-revision-arrives then archive-failure', solve('optimistically-hidden', [('new-revision-arrives', N), ('archive-failure', N)], N), 'restored-new-revision-error')
check('domain state regression 1: saved', solve('row-visible', [('archive-click', N, {})], N, {}, 'saved'), {'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}})
check('domain state regression 2: row', solve('optimistically-hidden', [('new-revision-arrives', N, {'revision': 1, 'text': 'stale'})], N, {}, 'row'), {'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}})
check('domain state regression 3: visible', solve('optimistically-hidden', [('new-revision-arrives', N, {'revision': 2, 'text': 'new'})], N, {}, 'visible'), {'phase': 'hidden-new-revision', 'value': False})
check('domain state regression 4: row', solve('hidden-new-revision', [('archive-failure', N, {})], N, {'row': {'revision': 2, 'text': 'new'}, 'saved': {'revision': 1, 'text': 'old'}}, 'row'), {'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}})
check('domain state regression 5: row', solve('optimistically-hidden', [('archive-failure', N, {})], N, {'saved': {'revision': 1, 'text': 'original'}}, 'row'), {'phase': 'restored-error', 'value': {'revision': 1, 'text': 'original'}})
check('domain state regression 6: visible', solve('restoring', [('restore-failure', N, {})], N, {}, 'visible'), {'phase': 'restore-error', 'value': False})
check('domain state regression 7: row', solve('row-visible', [('archive-click', N, {}), ('new-revision-arrives', N, {'revision': 2, 'text': 'new'}), ('archive-failure', N, {})], N, {}, 'row'), {'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
row-visible / archive-clickoptimistically-hiddenoptimistically-hiddenPassed
optimistically-hidden / archive-successarchivedarchivedPassed
optimistically-hidden / archive-failurerestored-errorrestored-errorPassed
restored-error / retry-archiveoptimistically-hiddenoptimistically-hiddenPassed
archived / restore-clickrestoringrestoringPassed
restoring / restore-successrow-visiblerow-visiblePassed
restoring / restore-failurearchivedrestore-errorFailed
restore-error / retry-restorerestoringrestoringPassed
optimistically-hidden / new-revision-arriveshidden-new-revisionhidden-new-revisionPassed
hidden-new-revision / archive-failurerestored-new-revision-errorrestored-new-revision-errorPassed
older notification incarnationrow-visiblerow-visiblePassed
future notification incarnationrow-visiblerow-visiblePassed
unknown event is inertrow-visiblerow-visiblePassed
empty delivery batchrow-visiblerow-visiblePassed
N stale deliveries before current deliveryoptimistically-hiddenoptimistically-hiddenPassed
trace archive-click then archive-successarchivedarchivedPassed
trace archive-click then archive-failurerestored-errorrestored-errorPassed
trace archive-click then new-revision-arriveshidden-new-revisionhidden-new-revisionPassed
trace archive-success then restore-clickrestoringrestoringPassed
trace archive-failure then retry-archiveoptimistically-hiddenoptimistically-hiddenPassed
trace retry-archive then archive-successarchivedarchivedPassed
trace retry-archive then archive-failurerestored-errorrestored-errorPassed
trace retry-archive then new-revision-arriveshidden-new-revisionhidden-new-revisionPassed
trace restore-click then restore-successrow-visiblerow-visiblePassed
trace restore-click then restore-failurearchivedrestore-errorFailed
trace restore-success then archive-clickoptimistically-hiddenoptimistically-hiddenPassed
trace restore-failure then retry-restorearchivedrestoringFailed
trace retry-restore then restore-successrow-visiblerow-visiblePassed
trace retry-restore then restore-failurearchivedrestore-errorFailed
trace new-revision-arrives then archive-failurerestored-new-revision-errorrestored-new-revision-errorPassed
domain state regression 1: saved{'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}}{'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}}Passed
domain state regression 2: row{'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}}{'phase': 'optimistically-hidden', 'value': {'revision': 1, 'text': 'old'}}Passed
domain state regression 3: visible{'phase': 'hidden-new-revision', 'value': False}{'phase': 'hidden-new-revision', 'value': False}Passed
domain state regression 4: row{'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}}{'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}}Passed
domain state regression 5: row{'phase': 'restored-error', 'value': {'revision': 1, 'text': 'original'}}{'phase': 'restored-error', 'value': {'revision': 1, 'text': 'original'}}Passed
domain state regression 6: visible{'phase': 'archived', 'value': False}{'phase': 'restore-error', 'value': False}Failed
domain state regression 7: row{'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}}{'phase': 'restored-new-revision-error', 'value': {'revision': 2, 'text': 'new'}}Passed

SHA-256 / c6a4b6ec590e386f39f9dafc6be6d7b49048eb3ce6c1bb6455f09f47e4398241

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Verification & scope

Stipulated single-notification state and policy model only. Event delivery and acknowledgements are explicit test inputs. No DOM, accessibility announcements, live timers, networking, actual rendering, or production-platform conformance is simulated. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:42:33.842975+00:00.

Case digest / 7d80f077061b9df9fe4ed467f43f7ab79999fc1fd6b6b73b9f481cf835e4f060