A persisted container was checked while its ENTRIES were dereferenced
unchecked. A stored `{"0x…": "notalist"}` in allowedSites passes the state
gate, renders a working popup, and then throws inside saveState()'s per-
hostname merge, so every save from that moment on fails while the UI looks
entirely healthy. deniedSites has the identical shape; fraudContracts is the
same class with a milder consequence.
The sweep for that class found four more:
- selectedToken, dereferenced as text behind a truthiness-only restore gate.
- rpcUrl, handed whole to `new JsonRpcProvider()` by getProvider(), which
throws SYNCHRONOUSLY for a non-string — from txStatus.js and addWallet.js,
neither inside a try, and the first reachable from a stored
`currentView: "wait-tx"` through the unguarded restoreView().
- The ENTRIES of viewData. Four restore branches gate on one truthy field and
hand the rest to a renderer that calls address.toLowerCase(): a stored
`{"currentView":"success-tx","viewData":{"hash":"0x1"}}` throws out of
restoreView(), skipping the rest of popup init.
- selectedWallet / selectedAddress. `wallets` is a real Array, so a stored
"map", "length", "constructor" or "__proto__" is TRUTHY: hasValidAddress()'s
`&&` does not short-circuit and `.addresses[…]` throws. A stale INTEGER index
is the safe case.
Floors, in src/shared/persistedState.js: allowedSites/deniedSites through
siteMap(), fraudContracts and each hostname list through textList(),
selectedToken and activeAddress as text-or-null, rpcUrl and blockscoutUrl as
non-empty text, selectedWallet and selectedAddress as a non-negative integer
or null, and each networkEndpoints pair's two URL fields — which
applyChainSwitchFields() assigns straight onto s.rpcUrl on the next switch.
Guards, in src/popup/viewRouter.js: the four restore branches that gate on one
truthy field now check the entries their renderer dereferences, as
txStatus.restoreWait() has always done for wait-tx. "confirm-tx" joins
ADDRESS_VIEWS, because its Sign button dereferences
state.wallets[state.selectedWallet] behind no guard of its own.
A stored own "__proto__" key is dropped by siteMap(): it can never be a wallet
address, so it grants nothing, and keeping it only keeps a value the next save
would hand to the prototype setter. networkEndpoints keeps unknown keys by
design, so mergeMapByKey() in src/shared/state.js now writes with
defineProperty as well — the guard in the floor was being undone one layer
downstream.
A save that fails is also told, not merely repaired: onSaveFailure() reports
every failed save, awaited or not (the save queue's own rejection handler is
what made a failure vanish), and the popup raises a persistent "NOT SAVED"
banner naming the reason. doRefreshAndRender() no longer rejects, since every
one of its call sites fires it and walks away.
The per-field justification in the header of src/shared/stateSchema.js is
replaced by tests/persistedFieldContract.test.js. That comment shipped a false
claim in three consecutive changes; the artifact was the problem. The test is
one row per persisted field, declaring the property that field's floor is
claimed to have and PROVING it by driving the real code with hostile values —
the gate for a field the gate refuses, normalizePersisted() for a field it
floors, the real JsonRpcProvider constructor for rpcUrl, and — for every field
whose only defence is that nothing dereferences it structurally — a boot of the
real popup entry point over that value onto EVERY view the popup can reopen
onto.
That last part is what makes the claim falsifiable, and it is why this defect
class is worth a harness at all: it lives on the RESTORE path and not on Home.
The claim is NARROW, and every artifact now states it that way rather than as
a universal: what those boots prove is no structural dereference on the code
paths a WHOLLY-CORRUPTED PROFILE takes. That is not every path a stored record
takes. Undriven, and said so plainly: any pairing of values the four slots do
not produce; a view only forward navigation opens; anything behind a click; and
everything a healthy profile reaches, which is most of the popup. Proving no
field is dereferenced on any reachable render path would be exhaustive
verification of the popup, which is not what this issue is.
Within that boundary the verdict is unconditional. If one of these boots leaves
the popup unhealthy or off the view it stored, the suite goes red — including
when it takes TWO corrupted fields at once, because the assertion is on the
combined boot itself and the per-field re-boot that names a culprit can only
decorate the message. An earlier version asserted on the per-field list
instead, so a dead popup no single field reproduced was observed and then
reported green. The suite also goes red on a field that gains a floor while its
row still claims it has none, and on a field added to PERSISTED_FIELDS with no
row.
Each swept field is driven at both polarities, or proven unable to be falsy
after the floor: a value nothing in src/ writes is a wrong-typed one and
therefore truthy, so without a falsy slot a dereference behind `if (!state.x)`
is never reached on the very boot that corrupts x, and for three of these
fields the falsy answer is the DEFAULT_STATE default — the branch every
ordinary install takes.
The boots are cheap enough to keep by construction rather than by sampling.
Every field the router itself reads is driven onto each view individually,
since a hostile value in one of those legitimately changes which view renders;
every other unfloored field is corrupted on the SAME boot, and that boot has to
land on the view it stored — so a field that does move the routing cannot hide
in the crowd. That is forty-four boots instead of several hundred; the suite
runs in 12.8s against a 30s cap.
The DOM stub in tests/support/popupBoot.js gained one thing to make any of that
possible: an element's parentElement. Without it success-tx and transaction
threw on the first line that hides a field's wrapper, so neither renderer could
be booted onto at all — every boot aimed at them fell back to Home instead, and
the base profile the sweep starts from is now asserted to render each view
rather than fall back, so that cannot go unnoticed again.
clawbot
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