fix: merge state per field instead of overwriting the whole blob (closes #304)
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saveState() is now a read-modify-write that merges only the fields this page
changed, diffed against a deep-cloned per-page baseline. wallets, allowedSites,
deniedSites and networkEndpoints merge structurally by identity, so membership
comes from fresh storage except for this page's own adds and deletes.

Fixes a second extension page silently deleting a wallet, the background balance
refresh clobbering a concurrent add or resurrecting a delete, and a stale page
resurrecting a revoked site permission.

Colliding wallet identities keep both records and log rather than silently
dropping an encryptedSecret. Concurrent writers of the same leaf remain
last-writer-wins by design.
This commit was merged in pull request #337.
This commit is contained in:
2026-08-20 16:41:19 +02:00
parent 20e911059a
commit cef6aaab11
3 changed files with 987 additions and 123 deletions

26
TODO.md
View File

@@ -44,6 +44,32 @@ but the review is broader than any of them.
# Completed Steps
- 2026-08-20: A second extension page can no longer silently delete a wallet
([#304](https://git.eeqj.de/sneak/AutistMask/issues/304)). `saveState()` wrote
the entire state blob, and every extension page — the toolbar popup, a dApp
approval window, `backgroundRefresh()` — holds its own in-memory `state`,
loaded once, with `showView()` saving on every navigation; a second page that
saved after a first had written something new overwrote it, no attacker or
unusual input required. `saveState()` is now a read-modify-write: it re-reads
storage, diffs the persisted fields against a deep-cloned `baseline` snapshot
taken at the last `loadState()`/`saveState()` on that page, and writes only
the fields that actually changed — everything else is carried forward from
storage in its loaded-and-normalized shape (`normalizePersisted()`, shared
with `loadState()`), so a legacy or malformed record a load has always
self-healed in memory keeps getting written back even on a save that touched
something else entirely. `showView()` fires `saveState()` on every navigation
without awaiting it, so two saves from the same page can be in flight at once;
a FIFO queue serializes them rather than letting a slow one finish after a
later one and re-derive a stale answer. Deliberately not done: the live
`state` of a field this page does not own is not rehydrated from what another
page wrote, only the persisted record is — adopting a concurrently-written
value into `state` reintroduced the same clobber one page later, caught by
`tests/txStatus.test.js` red. Two writers of the same field still resolve
last-writer-wins, documented at the merge point. `tests/stateMerge.test.js`
covers the two-page save and the approval-window reproduction from the issue —
add a wallet in one page, force a save from a second page loaded before it,
both wallets survive — each demonstrated failing against the unfixed full-blob
write.
- 2026-08-20: A forgotten password no longer wedges the wallet
([#312](https://git.eeqj.de/sneak/AutistMask/issues/312)). Deleting a wallet
was password-gated and importing its recovery phrase again was refused as a

View File

@@ -6,6 +6,7 @@ const { networkById } = require("./networks");
const { RESTORABLE_VIEWS } = require("../popup/restorableViews");
const { storageGet, storageSet } = require("./browserApi");
const { log } = require("./log");
const DEFAULT_STATE = {
hasWallet: false,
@@ -88,135 +89,529 @@ function currentNetwork() {
return networkById(state.networkId);
}
async function saveState() {
const persisted = {
hasWallet: state.hasWallet,
wallets: state.wallets,
trackedTokens: state.trackedTokens,
networkId: state.networkId,
rpcUrl: state.rpcUrl,
blockscoutUrl: state.blockscoutUrl,
networkEndpoints: state.networkEndpoints,
lastBalanceRefresh: state.lastBalanceRefresh,
activeAddress: state.activeAddress,
allowedSites: state.allowedSites,
deniedSites: state.deniedSites,
rememberSiteChoice: state.rememberSiteChoice,
showZeroBalanceTokens: state.showZeroBalanceTokens,
hideSpoofedSymbols: state.hideSpoofedSymbols,
hideLowHolderTokens: state.hideLowHolderTokens,
hideFraudContracts: state.hideFraudContracts,
hideDustTransactions: state.hideDustTransactions,
dustThresholdGwei: state.dustThresholdGwei,
utcTimestamps: state.utcTimestamps,
fraudContracts: state.fraudContracts,
tokenHolderCache: state.tokenHolderCache,
theme: state.theme,
debugMode: state.debugMode,
currentView: state.currentView,
selectedWallet: state.selectedWallet,
selectedAddress: state.selectedAddress,
selectedToken: state.selectedToken,
viewData: state.viewData,
viewStack: state.viewStack,
};
await storageSet({ autistmask: persisted });
// Every field written to and read from the single "autistmask" storage key.
// hasWallet is deliberately excluded from the diffing/merge logic below —
// like loadState() does, it is always derived from `wallets`, never carried
// as an independent value.
const PERSISTED_FIELDS = Object.keys(DEFAULT_STATE)
.filter((key) => key !== "hasWallet")
.concat([
"currentView",
"selectedWallet",
"selectedAddress",
"selectedToken",
"viewData",
"viewStack",
]);
// Turn a raw stored (or missing) record into the full, defaulted shape
// loadState() used to assign directly onto `state`. Pulled out as a pure
// function so saveState() can apply it too: the fields THIS page did not
// change still have to come from storage in their loaded-and-normalized
// form, not as the raw bytes another page (or an old release) left there —
// otherwise a legacy shape a load has always self-healed in memory (a
// missing networkEndpoints map, an out-of-range flag) is dropped right back
// into storage unfixed every time the page that DID normalize it saves
// something unrelated, because that field's value never "changed" for that
// page to notice.
function normalizePersisted(saved) {
saved = saved || {};
const out = {};
out.wallets = saved.wallets || [];
// Derived, never trusted verbatim off storage — see loadState().
out.hasWallet = out.wallets.length > 0;
out.trackedTokens = saved.trackedTokens || [];
out.networkId = saved.networkId || DEFAULT_STATE.networkId;
out.rpcUrl = saved.rpcUrl || DEFAULT_STATE.rpcUrl;
out.blockscoutUrl = saved.blockscoutUrl || DEFAULT_STATE.blockscoutUrl;
// An actual object is required, not merely a truthy non-array: the code
// below and onChainSwitch() index and ASSIGN INTO this value, and
// assigning a property to a string or a number is a silent no-op in
// sloppy mode. Copied rather than referenced, nested pairs included, so
// normalizing never mutates the object a caller handed in.
const rawEndpoints =
typeof saved.networkEndpoints === "object" &&
saved.networkEndpoints !== null &&
!Array.isArray(saved.networkEndpoints)
? saved.networkEndpoints
: {};
out.networkEndpoints = {};
for (const netId of Object.keys(rawEndpoints)) {
out.networkEndpoints[netId] = { ...rawEndpoints[netId] };
}
// A profile written before this map existed carries exactly one pair of
// endpoints, belonging to whatever network it was last on. Adopt it as
// that network's remembered pair, so a custom endpoint set on the old
// build is not lost by the first switch away and back.
if (!out.networkEndpoints[out.networkId]) {
out.networkEndpoints[out.networkId] = {
rpcUrl: out.rpcUrl,
blockscoutUrl: out.blockscoutUrl,
};
}
out.lastBalanceRefresh = saved.lastBalanceRefresh || 0;
out.activeAddress = saved.activeAddress || null;
out.allowedSites =
saved.allowedSites && !Array.isArray(saved.allowedSites)
? saved.allowedSites
: {};
out.deniedSites =
saved.deniedSites && !Array.isArray(saved.deniedSites)
? saved.deniedSites
: {};
out.rememberSiteChoice =
saved.rememberSiteChoice !== undefined
? saved.rememberSiteChoice
: true;
out.showZeroBalanceTokens =
saved.showZeroBalanceTokens !== undefined
? saved.showZeroBalanceTokens
: true;
// A profile written before this setting existed has no key for it. It
// is a safety filter, so absent must load as on, not as undefined.
out.hideSpoofedSymbols =
saved.hideSpoofedSymbols !== undefined
? saved.hideSpoofedSymbols
: true;
out.hideLowHolderTokens =
saved.hideLowHolderTokens !== undefined
? saved.hideLowHolderTokens
: true;
out.hideFraudContracts =
saved.hideFraudContracts !== undefined
? saved.hideFraudContracts
: true;
out.hideDustTransactions =
saved.hideDustTransactions !== undefined
? saved.hideDustTransactions
: true;
out.dustThresholdGwei =
saved.dustThresholdGwei !== undefined
? saved.dustThresholdGwei
: 100000;
out.utcTimestamps =
saved.utcTimestamps !== undefined ? saved.utcTimestamps : false;
out.fraudContracts = saved.fraudContracts || [];
out.tokenHolderCache = saved.tokenHolderCache || {};
out.theme = saved.theme || "system";
out.debugMode = saved.debugMode !== undefined ? saved.debugMode : false;
out.currentView = saved.currentView || null;
out.selectedWallet =
saved.selectedWallet !== undefined ? saved.selectedWallet : null;
out.selectedAddress =
saved.selectedAddress !== undefined ? saved.selectedAddress : null;
out.selectedToken = saved.selectedToken || null;
out.viewData = saved.viewData || {};
out.viewStack = restorableStack(saved.viewStack, out.currentView);
return out;
}
// The persisted fields as they stood at the end of this page's last
// loadState() or saveState(). saveState() diffs the live state against this
// to find only the fields THIS page actually changed.
//
// Deep-cloned, not a reference: callers mutate persisted objects and arrays
// in place (state.wallets.push(...)), and a reference baseline would mutate
// right along with `state`, so the diff would always come out empty.
let baseline = null;
function snapshotPersisted() {
const out = {};
for (const key of PERSISTED_FIELDS) out[key] = state[key];
return out;
}
function deepEqual(a, b) {
if (a === b) return true;
if (typeof a !== "object" || typeof b !== "object") return false;
if (a === null || b === null) return false;
if (Array.isArray(a) !== Array.isArray(b)) return false;
const aKeys = Object.keys(a);
const bKeys = Object.keys(b);
if (aKeys.length !== bKeys.length) return false;
for (const key of aKeys) {
if (!Object.prototype.hasOwnProperty.call(b, key)) return false;
if (!deepEqual(a[key], b[key])) return false;
}
return true;
}
// Stable identity for a wallet, independent of its position in the array
// (which shifts under a concurrent add/delete elsewhere) and independent of
// its mutable fields (name is user-editable; addresses gains/loses entries
// via scanning and deleteAddress.js). An "hd"/"xprv" wallet's xpub never
// changes for its lifetime and is already enforced unique
// (findWalletByXpub() in addWallet.js). A "key" wallet has no xpub, exactly
// one address for its whole lifetime (nothing ever adds to or removes from
// a key wallet's address list), and that address is already enforced
// unique (findWalletByAddress()) — so it stands in for identity there.
// Neither invariant is enforced by this function or by
// mergeListByIdentity() below — they hold only because every wallet-
// creation path in addWallet.js happens to populate one or the other before
// the wallet ever reaches state.wallets, and because canRemoveAddress() in
// walletDelete.js never lets a wallet's address list go to zero. A wallet
// with neither (an empty/legacy/corrupt record) falls back to the same
// "addr:" identity as every other such record, which is a genuine
// collision, not a proxy for one — see the collision handling in
// mergeListByIdentity().
function walletIdentity(wallet) {
if (wallet.xpub) return "xpub:" + wallet.xpub;
const first = wallet.addresses && wallet.addresses[0];
return "addr:" + (first ? String(first.address).toLowerCase() : "");
}
// Stable identity for an address within one wallet's address list. An
// address is unique within its wallet and, once derived or imported, never
// changes — only whether it is present.
function addressIdentity(addr) {
return String(addr.address).toLowerCase();
}
// Merge one array of identity-bearing objects (wallets, or the addresses
// inside one wallet) by identity rather than by array index — an index
// shifts under a concurrent insert/delete elsewhere, which would merge the
// wrong pair of objects entirely.
//
// `theirs` (fresh storage) sets the membership baseline and the order:
// - An item this page never had baseline knowledge of, but that is in
// `theirs`, was added by someone else — kept as-is.
// - An item `base` had and `ours` no longer has was deleted by THIS page
// — dropped even though `theirs` still has it (this page's own delete
// must win over a background save that only touched leaf fields).
// - An item present in both `ours` and `theirs` is merged leaf-by-leaf via
// `mergeItem`, so a leaf this page changed (e.g. a renamed wallet) lands
// on top of `theirs`' otherwise-current copy (e.g. a refreshed balance).
// Anything left in `ours` that `base` never had and `theirs` does not have
// yet is this page's own new addition — appended.
//
// `identityOf` is not guaranteed collision-free (walletIdentity() falls
// back to one shared "addr:" value for any wallet with neither an xpub nor
// a populated first address). Two records that collide under it must never
// silently collapse into one — that is exactly how this function used to
// drop a wallet, encryptedSecret included, with no error and no log. Two
// defenses:
// - `ours` is indexed into GROUPS, not a single item per identity, so two
// colliding live items on this page can't overwrite each other in the
// index before the merge below even runs.
// - A matched pair with no shared `base` entry (neither page ever agreed
// on this identity) is only merged leaf-by-leaf when the two sides are
// already equal. If they differ, that is not "the same record edited
// twice", it is two different records that happen to share an identity
// — both are kept, unmerged, rather than guessing which one is real.
function mergeListByIdentity(base, ours, theirs, identityOf, mergeItem) {
base = base || [];
ours = ours || [];
theirs = theirs || [];
const baseIndex = new Map(base.map((item) => [identityOf(item), item]));
const oursIndex = new Map();
for (const item of ours) {
const id = identityOf(item);
if (!oursIndex.has(id)) oursIndex.set(id, []);
oursIndex.get(id).push(item);
}
const result = [];
const seen = new Set();
for (const theirItem of theirs) {
const id = identityOf(theirItem);
seen.add(id);
const oursGroup = oursIndex.get(id);
if (baseIndex.has(id) && !oursGroup) continue;
if (oursGroup) {
const baseItem = baseIndex.get(id);
if (!baseItem && !deepEqual(oursGroup[0], theirItem)) {
log.errorf(
"state: identity collision merging",
JSON.stringify(id),
"- keeping both records instead of dropping one",
);
result.push(theirItem, ...oursGroup);
} else {
result.push(mergeItem(baseItem, oursGroup[0], theirItem));
for (let i = 1; i < oursGroup.length; i++) {
result.push(oursGroup[i]);
}
}
} else {
result.push(theirItem);
}
}
for (const item of ours) {
const id = identityOf(item);
if (seen.has(id)) continue;
if (!baseIndex.has(id)) result.push(item);
}
return result;
}
// Merge one wallet's scalar/leaf fields (name, encryptedSecret, nextIndex,
// ...) against base, then recurse into its address list by identity. `base`
// is null when this page created the wallet itself and no other page has
// (yet) produced a same-identity record — nothing to merge in that case,
// this page's own copy wins outright. mergeListByIdentity() only ever calls
// this with `!base` when `ours` and `theirs` are already equal (a genuine
// collision between two DIFFERENT same-identity records is caught and kept
// as two separate entries before this function is reached), so returning
// `ours` here can't discard a different wallet's data.
function mergeWallet(base, ours, theirs) {
if (!base) return ours;
const merged = { ...theirs };
for (const key of Object.keys(ours)) {
if (key === "addresses") continue;
if (!deepEqual(ours[key], base[key])) merged[key] = ours[key];
}
merged.addresses = mergeListByIdentity(
base.addresses,
ours.addresses,
theirs.addresses,
addressIdentity,
mergeAddress,
);
return merged;
}
// Merge one address's leaf fields (balance, ensName, tokenBalances, ...).
// tokenBalances is itself an array, but only backgroundRefresh() ever
// writes it and always wholesale (refreshBalances() in
// src/shared/balances.js), so there is no membership to reconcile within
// it — it is a leaf like balance or ensName, not a list with its own
// identity.
function mergeAddress(base, ours, theirs) {
if (!base) return ours;
const merged = { ...theirs };
for (const key of Object.keys(ours)) {
if (!deepEqual(ours[key], base[key])) merged[key] = ours[key];
}
return merged;
}
// Merge a plain object keyed by string (allowedSites/deniedSites: address ->
// hostname list; networkEndpoints: networkId -> {rpcUrl, blockscoutUrl}) the
// same way mergeListByIdentity() merges an array — by key, not by whole-
// object diff — so a key one page added or removed applies independently of
// a key another page edited. Unlike an array's identity function, an object
// key can't collide with a different logical entry (Object.keys() is
// already deduplicated), so this needs no collision floor of its own.
function mergeMapByKey(base, ours, theirs, mergeLeaf) {
base = base || {};
ours = ours || {};
theirs = theirs || {};
const result = {};
const seen = new Set();
for (const key of Object.keys(theirs)) {
seen.add(key);
const inBase = Object.prototype.hasOwnProperty.call(base, key);
const inOurs = Object.prototype.hasOwnProperty.call(ours, key);
if (inBase && !inOurs) continue; // this page deleted the whole entry
if (inOurs) {
result[key] = mergeLeaf(base[key], ours[key], theirs[key]);
} else {
result[key] = theirs[key];
}
}
for (const key of Object.keys(ours)) {
if (seen.has(key)) continue;
if (!Object.prototype.hasOwnProperty.call(base, key)) {
result[key] = ours[key];
}
}
return result;
}
// allowedSites/deniedSites: { [address]: [hostname, ...] }. The hostname
// list is itself membership, not a leaf — src/background/index.js pushes a
// newly approved/denied hostname onto it in place, and the Settings "revoke"
// button (src/popup/views/settings.js) filters a hostname out of it in
// place, from a different page. Merge it the same way wallets are merged:
// identity is the hostname itself, so a merged pair is always equal and
// mergeItem is a no-op pick.
function mergeHostnameList(base, ours, theirs) {
return mergeListByIdentity(
base,
ours,
theirs,
(hostname) => hostname,
(b, o, t) => t,
);
}
function mergeSiteMap(base, ours, theirs) {
return mergeMapByKey(base, ours, theirs, mergeHostnameList);
}
// networkEndpoints: { [networkId]: {rpcUrl, blockscoutUrl} }. onChainSwitch()
// (src/shared/chainSwitch.js) writes state.networkEndpoints[networkId] in
// place before saving. No code path ever removes a key from this map, so the
// membership collision that matters for allowedSites/wallets (an add on one
// page racing a delete on another) can't happen here — but two pages
// switching to two different networks concurrently still race a whole-field
// diff the same way, so it gets the same per-key merge for the leaf edit
// case (e.g. Settings saving a custom RPC URL for the active network).
function mergeEndpointEntry(base, ours, theirs) {
if (!base) return ours;
const merged = { ...theirs };
for (const key of Object.keys(ours)) {
if (!deepEqual(ours[key], base[key])) merged[key] = ours[key];
}
return merged;
}
function mergeNetworkEndpoints(base, ours, theirs) {
return mergeMapByKey(base, ours, theirs, mergeEndpointEntry);
}
// Read-modify-write, merged per field, rather than one full-blob write.
//
// Every extension page (the toolbar popup, a dApp approval window, the
// background's backgroundRefresh()) holds its own in-memory `state`, loaded
// once, and showView() saves on every navigation. A full-blob write here
// clobbers whatever a second page had written since — including, in the
// worst case, an entire wallet and its encrypted secret with no attacker
// and no unusual input (see the issue this fixes).
//
// Only the fields this page actually changed — those that differ from
// `baseline`, captured at the last loadState()/saveState() on this page —
// are written; every other field is carried forward from whatever is in
// storage right now, which may already be a value another page wrote.
//
// `wallets` is merged structurally (mergeListByIdentity(), by wallet
// identity and then by address identity within each wallet), not as one
// whole field: backgroundRefresh() mutates wallets IN PLACE (addr.balance /
// ensName / tokenBalances, via refreshBalances()), so a whole-field diff
// would mark all of `wallets` "changed" the moment any balance moved and
// write back background's own copy — loaded before its multi-second network
// round trip — clobbering a wallet another page added, or resurrecting one
// another page deleted, in that window. Merging by identity lets
// background's leaf changes and another page's membership changes
// (add/delete a wallet or an address) apply independently instead of
// colliding as the same field.
//
// `allowedSites` and `deniedSites` get the same treatment (mergeSiteMap(),
// by address key and then by hostname within each address's list), for the
// identical reason: src/background/index.js pushes a newly
// approved/denied hostname onto them in place, and the Settings "revoke"
// button (src/popup/views/settings.js) filters one out in place, from a
// different page. A whole-field diff here doesn't just lose data, it is a
// security defect — a stale page's save can resurrect a just-revoked site
// permission, or silently wipe a permission just granted elsewhere.
//
// `networkEndpoints` gets the same treatment too (mergeNetworkEndpoints(),
// by network id), since onChainSwitch() writes into it in place; the value
// per key is a small leaf object with no membership of its own; see the
// comment at mergeEndpointEntry() for why the collision this closes is
// milder than the other two.
//
// Every other persisted field stays a whole-field diff:
// `trackedTokens`/`fraudContracts`/`viewStack` are arrays of scalars with no
// per-element identity to merge by; `tokenHolderCache` is a map shaped like
// the ones above, but nothing in src/ ever writes an entry into it — it is
// only ever reset wholesale to `{}` (onChainSwitch()) — so there is no
// in-place mutation for a whole-field diff to collide with; `viewData` is
// this page's own UI scratch space, not data another page has any reason to
// share membership of.
//
// This does not make two pages that both change the SAME leaf concurrently
// safe: last write wins on that one leaf, same as before. What it removes
// is the cross-field (and now cross-membership-vs-leaf) clobber — a page
// that only navigated, or only refreshed a balance, overwriting a wallet or
// address list it never touched the membership of.
//
// This page's own live `state` is deliberately NOT rehydrated from a field
// another page changed — only the record written to storage is merged.
// showView() fires saveState() on every navigation without awaiting it,
// which is what makes the queue above necessary in the first place, and a
// save that is slow to come back has no way to tell whether the field it
// is about to hand back is still the current answer or has since been
// overtaken by something this very page did in the meantime; writing it
// into `state` regardless reintroduced exactly the clobber this function
// exists to remove, just delayed and confined to one page instead of two
// (caught by tests/txStatus.test.js). A page's live picture of a field it
// does not own goes on being whatever its last loadState() saw, same as
// before this fix; only the persisted record is guaranteed current.
async function saveStateOnce() {
const current = snapshotPersisted();
const result = await storageGet("autistmask");
// Normalized, not raw: a field this page did not change still has to
// come from storage in its loaded (self-healed) shape. See
// normalizePersisted() above.
const fresh = normalizePersisted(result.autistmask);
const merged = { ...fresh };
for (const key of PERSISTED_FIELDS) {
if (key === "wallets") {
merged.wallets = mergeListByIdentity(
baseline ? baseline.wallets : [],
current.wallets,
fresh.wallets,
walletIdentity,
mergeWallet,
);
} else if (key === "allowedSites" || key === "deniedSites") {
merged[key] = mergeSiteMap(
baseline ? baseline[key] : {},
current[key],
fresh[key],
);
} else if (key === "networkEndpoints") {
merged.networkEndpoints = mergeNetworkEndpoints(
baseline ? baseline.networkEndpoints : {},
current.networkEndpoints,
fresh.networkEndpoints,
);
} else if (
baseline === null ||
!deepEqual(current[key], baseline[key])
) {
merged[key] = current[key];
}
}
merged.hasWallet = Boolean(merged.wallets && merged.wallets.length > 0);
await storageSet({ autistmask: merged });
// Derived from this page's own wallets, never adopted off the wire —
// see loadState(). Everything else this page did not change is left
// exactly as it stood; see the note above.
state.hasWallet = state.wallets.length > 0;
baseline = structuredClone(snapshotPersisted());
}
// showView() calls saveState() on every navigation without awaiting it, so
// two saves from the SAME page can be in flight at once — e.g. a screen
// shown, then immediately replaced before the first save's storageGet()
// round trip has come back. Left concurrent, the first save's turn would
// finish after the second's live-state mutation and then re-hydrate `state`
// from what IT read, stomping the second, later change back to a stale
// value — the same clobber this function exists to prevent, just between
// two saves on one page instead of two pages. Queuing makes every save's
// snapshot-diff-write-rehydrate run start to finish before the next one
// begins, so each one only ever sees the true live state at its turn.
let saveQueue = Promise.resolve();
function saveState() {
const turn = saveQueue.then(saveStateOnce);
// The queue must advance even when a save rejects, or every save after
// it queues behind a promise that never settles.
saveQueue = turn.catch(() => {});
return turn;
}
async function loadState() {
const result = await storageGet("autistmask");
if (result.autistmask) {
const saved = result.autistmask;
state.wallets = saved.wallets || [];
// Derived, never read from storage: a profile persisted with the flag
// out of step with the wallet list would otherwise stay broken on
// every load. Nothing depends on the two disagreeing.
state.hasWallet = state.wallets.length > 0;
state.trackedTokens = saved.trackedTokens || [];
state.networkId = saved.networkId || DEFAULT_STATE.networkId;
state.rpcUrl = saved.rpcUrl || DEFAULT_STATE.rpcUrl;
state.blockscoutUrl =
saved.blockscoutUrl || DEFAULT_STATE.blockscoutUrl;
// An actual object is required, not merely a truthy non-array: the
// code below and onChainSwitch() index and ASSIGN INTO this value,
// and assigning a property to a string or a number is a silent no-op
// in sloppy mode. A stored primitive would therefore be re-persisted
// unchanged forever, and every switch would fall back to the network
// default — the endpoint loss this map exists to prevent, with no
// self-healing. The allowedSites/deniedSites guards below are only
// read from, which is why they can be looser.
state.networkEndpoints =
typeof saved.networkEndpoints === "object" &&
saved.networkEndpoints !== null &&
!Array.isArray(saved.networkEndpoints)
? saved.networkEndpoints
: {};
// A profile written before this map existed carries exactly one pair
// of endpoints, belonging to whatever network it was last on. Adopt
// it as that network's remembered pair, so a custom endpoint set on
// the old build is not lost by the first switch away and back.
if (!state.networkEndpoints[state.networkId]) {
state.networkEndpoints[state.networkId] = {
rpcUrl: state.rpcUrl,
blockscoutUrl: state.blockscoutUrl,
};
}
state.lastBalanceRefresh = saved.lastBalanceRefresh || 0;
state.activeAddress = saved.activeAddress || null;
state.allowedSites =
saved.allowedSites && !Array.isArray(saved.allowedSites)
? saved.allowedSites
: {};
state.deniedSites =
saved.deniedSites && !Array.isArray(saved.deniedSites)
? saved.deniedSites
: {};
state.rememberSiteChoice =
saved.rememberSiteChoice !== undefined
? saved.rememberSiteChoice
: true;
state.showZeroBalanceTokens =
saved.showZeroBalanceTokens !== undefined
? saved.showZeroBalanceTokens
: true;
// A profile written before this setting existed has no key for it.
// It is a safety filter, so absent must load as on, not as undefined.
state.hideSpoofedSymbols =
saved.hideSpoofedSymbols !== undefined
? saved.hideSpoofedSymbols
: true;
state.hideLowHolderTokens =
saved.hideLowHolderTokens !== undefined
? saved.hideLowHolderTokens
: true;
state.hideFraudContracts =
saved.hideFraudContracts !== undefined
? saved.hideFraudContracts
: true;
state.hideDustTransactions =
saved.hideDustTransactions !== undefined
? saved.hideDustTransactions
: true;
state.dustThresholdGwei =
saved.dustThresholdGwei !== undefined
? saved.dustThresholdGwei
: 100000;
state.utcTimestamps =
saved.utcTimestamps !== undefined ? saved.utcTimestamps : false;
state.fraudContracts = saved.fraudContracts || [];
state.tokenHolderCache = saved.tokenHolderCache || {};
state.theme = saved.theme || "system";
state.debugMode =
saved.debugMode !== undefined ? saved.debugMode : false;
state.currentView = saved.currentView || null;
state.selectedWallet =
saved.selectedWallet !== undefined ? saved.selectedWallet : null;
state.selectedAddress =
saved.selectedAddress !== undefined ? saved.selectedAddress : null;
state.selectedToken = saved.selectedToken || null;
state.viewData = saved.viewData || {};
state.viewStack = restorableStack(saved.viewStack, state.currentView);
Object.assign(state, normalizePersisted(result.autistmask));
}
// The point of comparison every saveState() on this page diffs against,
// whether storage had a profile or was empty. See PERSISTED_FIELDS above
// saveState() for why a reference here would be wrong.
baseline = structuredClone(snapshotPersisted());
}
function currentAddress() {

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tests/stateMerge.test.js Normal file
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// saveState() used to write the entire state blob every time
// (src/shared/state.js). Every extension page — the toolbar popup, a dApp
// approval window opened by the background, backgroundRefresh() in
// src/background/index.js — holds its own in-memory `state`, loaded once,
// and src/popup/views/helpers.js showView() saves on EVERY navigation. So
// any second page that saved after a first page had written something new
// overwrote it, with no attacker and no unusual input: a whole wallet, name,
// addresses and encrypted secret included, silently gone
// (https://git.eeqj.de/sneak/AutistMask/issues/304).
//
// Both cases below drive the real state.js module through two independent
// module registries sharing one storage backend, the way two real extension
// pages share one chrome.storage.local. The storage stub structured-clones
// on both get and set — a stub that hands back the object it was given
// aliases the caller's own mutation and would make this entire defect class
// invisible (see https://git.eeqj.de/sneak/AutistMask/issues/324).
function makeStorage() {
let store = {};
return {
get: async (keys) => {
const wanted =
keys === undefined || keys === null
? Object.keys(store)
: [].concat(keys);
const out = {};
for (const key of wanted) {
if (key in store) out[key] = structuredClone(store[key]);
}
return out;
},
set: async (items) => {
for (const [key, value] of Object.entries(items)) {
store[key] = structuredClone(value);
}
},
};
}
// One extension page: a fresh module registry over the shared storage.
// state.js resolves the storage API at require time, so the stub has to be
// installed before the module is loaded, and `state` is a module-level
// singleton, so each page needs its own registry to hold its own copy.
function loadPage(storage) {
jest.resetModules();
globalThis.chrome = { storage: { local: storage } };
return {
state: require("../src/shared/state"),
helpers: require("../src/popup/views/helpers"),
};
}
function wallet(name, secret, address) {
return {
type: "hd",
name,
xpub: "xpub-" + name,
encryptedSecret: secret,
nextIndex: 1,
addresses: [{ address, balance: "0", tokenBalances: [] }],
};
}
const W1 = wallet(
"Wallet 1",
"secret-one",
"0x66133E8ea0f5D1d612D2502a968757D1048c214a",
);
const W2 = wallet(
"Wallet 2",
"secret-two",
"0xdAC17F958D2ee523a2206206994597C13D831ec7",
);
// Minimal DOM: showView() toggles view elements, clears the flash line and
// creates/removes the debug banner. Nothing here is asserted; it only has to
// answer without throwing, the way the popup's own index.html would.
function makeElement(id) {
const classes = new Set();
return {
id,
textContent: "",
style: {},
classList: {
add: (...n) => n.forEach((c) => classes.add(c)),
remove: (...n) => n.forEach((c) => classes.delete(c)),
toggle: (c, force) => {
const on = force === undefined ? !classes.has(c) : force;
if (on) classes.add(c);
else classes.delete(c);
return on;
},
},
remove: () => {},
};
}
function makeDocument() {
const els = new Map();
return {
getElementById(id) {
if (id === "debug-banner") return null;
if (!els.has(id)) els.set(id, makeElement(id));
return els.get(id);
},
createElement: () => makeElement("created"),
body: { prepend: () => {} },
};
}
afterEach(() => {
delete globalThis.chrome;
delete globalThis.document;
});
describe("a save from a page that never saw a wallet another page added", () => {
// The first DoD case on the issue: add a wallet in one page, then force
// a save from a second page loaded before that wallet existed. Both
// wallets must survive.
test("both wallets are in storage afterwards", async () => {
const storage = makeStorage();
await storage.set({ autistmask: { wallets: [W1] } });
// Loaded while storage held only Wallet 1, and never reloads —
// the approval window in the reproduction, or a second popup that
// has been open for a while.
const stale = loadPage(storage);
await stale.state.loadState();
expect(stale.state.state.wallets).toHaveLength(1);
// A second page, loaded after, adds a wallet — the exact sequence
// src/popup/views/addWallet.js uses.
const fresh = loadPage(storage);
await fresh.state.loadState();
fresh.state.state.wallets.push(W2);
fresh.state.state.hasWallet = true;
await fresh.state.saveState();
expect(
(await storage.get("autistmask")).autistmask.wallets,
).toHaveLength(2);
// The stale page saves something that has nothing to do with
// wallets — exactly what showView() does on every navigation, and
// what backgroundRefresh() does after a balance poll.
stale.state.state.currentView = "settings";
await stale.state.saveState();
const persisted = (await storage.get("autistmask")).autistmask;
expect(persisted.wallets.map((w) => w.name)).toEqual([
"Wallet 1",
"Wallet 2",
]);
expect(persisted.wallets.map((w) => w.encryptedSecret)).toEqual([
"secret-one",
"secret-two",
]);
});
});
describe("the approval-window reproduction", () => {
// approval window open, add a wallet in the popup, confirm the approval
// — the exact sequence from the issue. The approval window and the
// popup are the same popup code with a different starting view, so
// showView() is the real save path in both: src/popup/views/approval.js
// showTxApproval() calls showView("approve-tx") when the window opens,
// and a successful confirm calls
// src/popup/views/txStatus.js showWait() -> startWait(), which calls
// showView("wait-tx") — the save that clobbered the second wallet in
// the reproduction on the issue.
test("the wallet added in the popup survives confirming the approval", async () => {
globalThis.document = makeDocument();
const storage = makeStorage();
await storage.set({ autistmask: { wallets: [W1] } });
// The background opens the approval window on the approve-tx
// screen; nothing else has happened yet.
const approvalWindow = loadPage(storage);
await approvalWindow.state.loadState();
approvalWindow.helpers.showView("approve-tx");
// showView() does not await its own saveState(); an extra save
// joins the same queue and only resolves once that one has too,
// which is the black-box way to know it landed.
await approvalWindow.state.saveState();
// The user adds a wallet in the popup — a separate page, loaded
// after the approval window.
const popup = loadPage(storage);
await popup.state.loadState();
popup.state.state.wallets.push(W2);
popup.state.state.hasWallet = true;
await popup.state.saveState();
expect(
(await storage.get("autistmask")).autistmask.wallets,
).toHaveLength(2);
// The user confirms the approval. The approval window navigates
// approve-tx -> wait-tx, saving again from state it loaded before
// Wallet 2 ever existed.
approvalWindow.helpers.showView("wait-tx");
await approvalWindow.state.saveState();
const persisted = (await storage.get("autistmask")).autistmask;
expect(persisted.wallets.map((w) => w.name)).toEqual([
"Wallet 1",
"Wallet 2",
]);
expect(persisted.wallets.map((w) => w.encryptedSecret)).toEqual([
"secret-one",
"secret-two",
]);
});
});
// backgroundRefresh() (src/background/index.js) loads state, spends seconds
// on network I/O in refreshBalances() (src/shared/balances.js) mutating
// addr.balance/ensName/tokenBalances IN PLACE on the wallets it already
// knew about, then saves. Precondition 2 on the issue: that refresh window
// overlapping a membership change (add or delete) on another page must not
// clobber or resurrect a wallet — a whole-field diff on `wallets` failed
// this, because "background changed a balance" and "another page changed
// membership" collided as the same field.
describe("background refresh racing a wallet added on another page", () => {
test("the wallet added elsewhere survives background's stale balance save", async () => {
const storage = makeStorage();
await storage.set({ autistmask: { wallets: [W1] } });
// "background": loads first, and its save is the one that lands
// last, modeling the multi-second network round trip in between.
const background = loadPage(storage);
await background.state.loadState();
background.state.state.wallets[0].addresses[0].balance = "1.2345";
// A second page, loaded after, adds a wallet while background's
// refresh is still in flight.
const popup = loadPage(storage);
await popup.state.loadState();
popup.state.state.wallets.push(W2);
popup.state.state.hasWallet = true;
await popup.state.saveState();
expect(
(await storage.get("autistmask")).autistmask.wallets,
).toHaveLength(2);
// background's save lands last, carrying only its balance update.
await background.state.saveState();
const persisted = (await storage.get("autistmask")).autistmask;
expect(persisted.wallets.map((w) => w.name)).toEqual([
"Wallet 1",
"Wallet 2",
]);
expect(persisted.wallets.map((w) => w.encryptedSecret)).toEqual([
"secret-one",
"secret-two",
]);
// The balance update itself must not be lost either — this is a
// merge, not deletion-always-wins.
expect(persisted.wallets[0].addresses[0].balance).toBe("1.2345");
});
});
describe("background refresh racing a wallet deleted on another page", () => {
test("the wallet deleted elsewhere stays deleted after background's stale balance save", async () => {
const storage = makeStorage();
await storage.set({ autistmask: { wallets: [W1, W2] } });
const background = loadPage(storage);
await background.state.loadState();
background.state.state.wallets[0].addresses[0].balance = "1.2345";
// A second page deletes Wallet 2 while background's refresh is in
// flight — the same splice deleteWallet.js's removeWalletFromState()
// does.
const popup = loadPage(storage);
await popup.state.loadState();
popup.state.state.wallets.splice(1, 1);
popup.state.state.hasWallet = popup.state.state.wallets.length > 0;
await popup.state.saveState();
expect(
(await storage.get("autistmask")).autistmask.wallets,
).toHaveLength(1);
await background.state.saveState();
const persisted = (await storage.get("autistmask")).autistmask;
expect(persisted.wallets.map((w) => w.name)).toEqual(["Wallet 1"]);
expect(persisted.wallets[0].addresses[0].balance).toBe("1.2345");
});
});
// allowedSites/deniedSites: { [address]: [hostname, ...] }. Mutated in place
// from two different contexts — src/background/index.js:592-599 pushes a
// newly approved hostname onto state.allowedSites[activeAddress], and the
// Settings "revoke" button (src/popup/views/settings.js:55-68) filters a
// hostname out of state[key][addr] in place, deleting the address key
// entirely once its list is empty — the exact membership-vs-whole-field
// pattern that made the whole-field `wallets` diff unsafe, on a
// security-relevant field: a stale whole-field save here can resurrect a
// revoked permission or wipe a freshly granted one.
const ADDR1 = "0x66133E8ea0f5D1d612D2502a968757D1048c214a";
const ADDR2 = "0xdAC17F958D2ee523a2206206994597C13D831ec7";
function approveSite(pageState, address, hostname) {
if (!pageState.allowedSites[address]) {
pageState.allowedSites[address] = [];
}
if (!pageState.allowedSites[address].includes(hostname)) {
pageState.allowedSites[address].push(hostname);
}
}
function revokeSite(pageState, hostname) {
for (const addr of Object.keys(pageState.allowedSites)) {
pageState.allowedSites[addr] = pageState.allowedSites[addr].filter(
(h) => h !== hostname,
);
if (pageState.allowedSites[addr].length === 0) {
delete pageState.allowedSites[addr];
}
}
}
describe("a dApp approval racing a stale Settings page's later save", () => {
test("the fresh approval survives Settings revoking an unrelated site", async () => {
const storage = makeStorage();
await storage.set({
autistmask: {
wallets: [W1],
allowedSites: { [ADDR2]: ["other.example"] },
},
});
// Settings loads first, and its save lands last — before either has
// any idea a dApp approval happened elsewhere in between.
const settings = loadPage(storage);
await settings.state.loadState();
// A dApp approval window, opened later, approves a new site for a
// different address and saves — the real sequence at
// src/background/index.js:592-599.
const approval = loadPage(storage);
await approval.state.loadState();
approveSite(approval.state.state, ADDR1, "dapp.example");
await approval.state.saveState();
expect(
(await storage.get("autistmask")).autistmask.allowedSites[ADDR1],
).toEqual(["dapp.example"]);
// Settings revokes its own, unrelated site — the real sequence at
// src/popup/views/settings.js:55-68 — and saves from state loaded
// before the dApp approval ever happened.
revokeSite(settings.state.state, "other.example");
await settings.state.saveState();
const persisted = (await storage.get("autistmask")).autistmask;
expect(persisted.allowedSites[ADDR1]).toEqual(["dapp.example"]);
expect(persisted.allowedSites[ADDR2]).toBeUndefined();
});
});
describe("a revoked site permission against a stale page's later save", () => {
test("the revocation holds even when the stale page approves something else", async () => {
const storage = makeStorage();
await storage.set({
autistmask: {
wallets: [W1],
allowedSites: { [ADDR1]: ["evil.example"] },
},
});
// A stale page loads while the permission still stands.
const stale = loadPage(storage);
await stale.state.loadState();
// Settings revokes it — src/popup/views/settings.js:55-68 — from a
// second page.
const settings = loadPage(storage);
await settings.state.loadState();
revokeSite(settings.state.state, "evil.example");
await settings.state.saveState();
expect(
(await storage.get("autistmask")).autistmask.allowedSites[ADDR1],
).toBeUndefined();
// The stale page, unaware of the revoke, approves an unrelated site
// for a different address and saves — src/background/index.js:592-599.
approveSite(stale.state.state, ADDR2, "good.example");
await stale.state.saveState();
const persisted = (await storage.get("autistmask")).autistmask;
expect(persisted.allowedSites[ADDR2]).toEqual(["good.example"]);
expect(persisted.allowedSites[ADDR1]).toBeUndefined();
});
});
// mergeListByIdentity()'s identity function is not guaranteed collision-free
// — walletIdentity() falls back to one shared "addr:" value for any wallet
// with neither an xpub nor a populated first address (a legacy or corrupt
// record). Two such records created independently on two different pages
// must not silently collapse into one, dropping the loser's
// encryptedSecret with no error and no log.
function legacyWallet(name, secret) {
return {
type: "legacy",
name,
encryptedSecret: secret,
nextIndex: 0,
addresses: [],
};
}
describe("two wallets independently created with a colliding identity", () => {
test("both survive, encryptedSecret included, instead of one silently replacing the other", async () => {
const storage = makeStorage();
await storage.set({ autistmask: { wallets: [W1] } });
// Both pages load before either has created their malformed wallet,
// so neither has baseline knowledge of the other's.
const pageA = loadPage(storage);
await pageA.state.loadState();
const pageB = loadPage(storage);
await pageB.state.loadState();
pageA.state.state.wallets.push(legacyWallet("Legacy A", "secret-a"));
pageA.state.state.hasWallet = true;
await pageA.state.saveState();
expect(
(await storage.get("autistmask")).autistmask.wallets,
).toHaveLength(2);
pageB.state.state.wallets.push(legacyWallet("Legacy B", "secret-b"));
pageB.state.state.hasWallet = true;
await pageB.state.saveState();
const persisted = (await storage.get("autistmask")).autistmask;
const secrets = persisted.wallets.map((w) => w.encryptedSecret);
expect(secrets).toContain("secret-one");
expect(secrets).toContain("secret-a");
expect(secrets).toContain("secret-b");
});
});