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harden: verify all approval fields and make failed signing retryable (closes #174 )

verifySignedTx compared only from, to, value and data, so a signed
transaction could differ from the approval in chain id, nonce, gas limit
or any fee field and still be broadcast. Worse, it named the fields it
checked and so admitted every field it did not name: a type 4 artifact
carrying an EIP-7702 authorization passed verification, paying the
approved amount to the approved recipient and, in the same transaction,
permanently installing another contract's code at the signer's own
account.

The check is now an allowlist in both directions. The transaction type
must be 0, 1 or 2 — the only types this wallet signs — so no later
EIP-2718 type can bring a field along; authorizationList, blobs, blob
commitments and blob gas fees are refused by name; and the access list
is compared with the approval. Every consequential field is compared and
any mismatch refuses outright: the chain id against the selected network
(and against the approval when the page fixed one), plus nonce, gas
limit, gasPrice, maxFeePerGas and maxPriorityFeePerGas wherever the
approval carries a value, together with the fee mechanism the approval
implies. Fields the approval does not carry are populated locally by the
popup and have no approved value to compare against, so they are held to
absolute ceilings instead. Verification then closes by rebuilding the
transaction from exactly those checked fields and comparing the unsigned
bytes, so an artifact carrying anything this module does not account for
is refused without having to be named first.

An approved value that is not a number now refuses like every other
quantity rather than escaping as a raw BigInt conversion error, which
was reported as retryable and left a live button that could never
succeed.

A failed signing attempt also left a button that could not succeed: the
background deleted the approval before it broadcast, so a retry found
nothing to sign. The approval is now retired once the request has an
outcome, and the background tells the popup which stage failed. A popup
that could not sign is retryable; a mismatch spends the approval; a
failed broadcast is terminal, because the node may have accepted the
transaction and still failed to answer and the popup's retry re-signs at
a freshly fetched nonce rather than re-broadcasting the same bytes,
which would send the approved transfer twice.

Keeping the approval alive for that retry cost it its single use: the
handler read it, then verified and broadcast asynchronously, so a second
AUTISTMASK_TX_RESPONSE carrying the same id started an independent
verify and broadcast instead of finding nothing. With the ordinary dApp
approval shape the page fixes no nonce, so two artifacts signed at
different nonces both verify and the approved transfer goes out twice; a
reloaded approval window during a slow broadcast is enough to send it,
since the only guard was popup-local button state. The approval is now
claimed synchronously, before the first await, and released only when an
attempt fails in a way the user may retry. Same interlock on
AUTISTMASK_SIGN_RESPONSE.

Verification also compared only the decode against itself: both sides of
the closing byte comparison derive from one Transaction.from(), while
what is broadcast is the artifact string. An artifact re-encoded with a
leading zero byte on an RLP quantity therefore decoded to the approved
transaction, passed, and broadcast different bytes. The artifact is now
required to be the canonical encoding of its own decode, which is what
makes the claim that it *is* the approved transaction true.

The background's approval wiring had no tests, which is where both
defects lived. It has them now, driven through the real message listener
from eth_sendTransaction to broadcast.

2026-08-12 08:24:44 +00:00

11 KiB

Raw Blame History

Workflow

git pull next and cut a branch from it — one branch per issue, named issue-<N>-<slug>. Never branch from main.
Do the work as one commit whose title ends with (closes #N), with the TODO.md update in that same commit.
Move Next Step to the top of Completed Steps; move the top item of Future Steps into Next Step.
Run make fmt, then make check. A feature branch may be red; next and main may not.
Rebase onto current next immediately before pushing — other branches land on next continuously — and re-run make check after resolving, because a clean textual merge can still break the build.
Push the branch and open one PR per issue with base next. Never base main.
An independent reviewer who did not write the change gates the merge. On a passed review the PR is squash-merged into next.
next is the branch for the next milestone. It is kept green and mergeable to main at any moment, without notice.
main receives exactly one PR per milestone, from next. Releases are tagged from main.

Status

pre-1.0, working towards the 1.0.0 milestone. Tagged v0.1.0 on 2026-02-27. The milestone is in flight on next; its next -> main PR is #190. make check verified green on next at e9fa8be on 2026-08-10, and make build produces dist/chrome/ and dist/firefox/ with every bundle verified to have DEBUG compiled off.

The backlog lives on the Gitea tracker, which is authoritative; this file does not duplicate it. Full policy file set present. A real-browser end-to-end suite (make test-e2e) now sits alongside make check, which cannot see a runtime ReferenceError in a popup view.

Next Step

Land #152: add ESLint to script/lint. make check is prettier --check only today and cannot catch undefined identifiers, which is how #150 and #151 shipped.

Completed Steps

2026-08-12: Bundled token list documentation no longer states a count. The four "top 250" claims in README.md and the "roughly 500" claim in docs/README.md are replaced with a description of how the list is actually selected — a point-in-time CoinGecko snapshot of the highest-market-cap Ethereum mainnet ERC-20s — with TOKENS in src/shared/tokenList.js named as the authoritative set (#239).
2026-08-11: Approval verification became an allowlist — transaction type restricted to 0/1/2 so an EIP-7702 delegation can no longer ride along on an approved transfer, every consequential field compared, the artifact re-serialized from the checked fields alone and its exact bytes required to be the canonical encoding of what was broadcast, and one approval now yields at most one broadcast; broadcast failure is terminal (#174).
2026-08-11: Known-symbol spoof verification became a Settings toggle (hideSpoofedSymbols), on by default, governing the transaction-history filter and the fraud-contract learning it feeds (#176).
2026-08-11: script/verify-build now walks dist/ NUL-delimited and asserts dist/ is a real directory, so a path with a trailing space or a newline can no longer carry a debug marker past the unlisted-bundle check (#223).
2026-08-11: UTC Timestamps checkbox moved from the Token Spam Protection well into Display, next to the theme selector (#212).
2026-08-11: Network fee counted in the confirmation-screen balance check for both ETH and ERC-20 sends, reserving what the node actually charges a type-2 transaction, with the arithmetic in a pure, unit-tested src/shared/txValidation.js (#154).
2026-08-11: A dust threshold of 0 now means "hide nothing" instead of falling back to the 100,000 gwei default, and every address comparison in src/shared/transactions.js goes through one case-normalising helper so a checksummed genuine contract is no longer read as a spoof (#179).
2026-08-11: Password-gated recovery phrase display for HD wallets, reached from the wallet row in Settings, wiped on leaving the screen and excluded from the views the popup can reopen onto (#161).
2026-08-11: Extended-key import hardened — the base58 checksum is now enforced on every xprv and xpub, and a non-master key is refused with an explanation instead of being derived beneath (#210).
2026-08-11: the balance refresh and the 24-hour phishing list refresh moved from setInterval to the extension alarms API, with the phishing delta and its fetch timestamps persisted to extension storage, so neither job dies with the MV3 service worker. Each job's freshness guard was decoupled from its alarm period at the same time — timed to the period, a guard vetoes its own scheduled tick and halves the real refresh rate (#158).
2026-08-11: Policy compliance sweep — conditional verbose test rerun, local Tailwind binary instead of npx, --frozen-lockfile on make install, and the Makefile-only targets documented in the README (#166).
2026-08-11: script/verify-build diagnostics corrected: the both-markers message now states what is and is not proven, an unreadable bundle is diagnosed as an I/O fault rather than as changed output, the *.js assumption lives only in build.js, and the unlisted-bundle scan hard-fails when it cannot enumerate dist/ (#180).
2026-08-11: Known-answer test coverage for the crypto core — BIP-39/BIP-32 derivation in wallet.js and the Argon2id vault in vault.js (#159).
2026-08-11: Three README.md claims corrected against the code — blocklist attribution, token-display rule, navigation model (#213).
2026-08-11: README Screen Map rebuilt from the code — every screen, element and transition re-verified against src/popup/ (#164).
2026-08-11: docs/README.md rewritten against the code: no competitor names, all five network destinations documented, password/Settings/Add Wallet sections corrected (#163).
2026-08-11: loadState() now derives hasWallet from the wallet list instead of trusting the persisted flag, so a profile already saved inconsistent no longer stays broken on every load (#195).
2026-08-11: Wallet deletion repairs its own state — hasWallet follows the remaining wallets, the selection only moves when it was deleted, and the active-address change is broadcast to connected sites (#156).
2026-08-11: One row per on-chain value movement in transaction history: the merge moved into the pure mergeTransactions and the zero-ETH native side of a plain ERC-20 transfer absorbed into its token row (#177).
2026-08-11: TODO.md Workflow rewritten to the branch-and-PR-per-issue model on next, with Status and Next Step refreshed (#191).
2026-08-09: DEBUG became a build-time constant defaulting to off, injected as the __BUILD_DEBUG__ esbuild define and turned on with AUTISTMASK_DEBUG=1, so a plain make build no longer hands every newly created wallet the publicly committed test recovery phrase (#149).
2026-08-09: dApp approval signing moved into the popup — the password no longer crosses the extension messaging boundary; the background broadcasts and resolves approvals only, and verifies the signed artifact against the approval it holds (#157).
2026-08-09: Post-build assertion that every emitted bundle containing constants.js has DEBUG compiled off, via script/verify-build on the make build path (#170).
2026-08-09: Containerized Chrome end-to-end harness (make test-e2e / script/test-e2e) driving the real popup with all network intercepted, plus the two used-but-not-imported crashes it caught: AddToken unreachable (#150) and TransactionDetail broken for every ERC-20 transfer (#151). Harness demonstrated failing before the fixes and passing after (#181). Interception covers the MV3 background service worker, not just the popup page, and a launch-time canary aborts the suite if worker traffic starts escaping.
2026-08-09: Reviewed the repo end to end and filed the 1.0.0 backlog (#149-#168).
2026-08-09: Test coverage for the address-poisoning defense in src/shared/transactions.js (#160)
2026-07-26: About well in settings with build info, repo link and the version click easter egg (#145); proper view navigation stack (#146).
2026-07-07 Adopted scripts-to-rule-them-all: script/ entrypoints, Makefile shims, README Entrypoints section (#148)
2026-03-01: USD display suppressed on testnets (#142); estimated USD for ETH in approve-tx view (#141).
Sepolia testnet support (#137); etherscan links go to token-specific URLs (#136).
Transaction detail improvements: Type field and on-chain details (#130), txid-first reordering (#133), swap display corrections (#128), expanded confirm-tx warnings (#118).
Dark mode theme setting (Light/Dark/System) with contrast fixes (#126); timestamps include timezone offset (#120); layout shift audit, reserved space for error messages (#124).
Copy-flash visual feedback with timing tune (#113, #121); cross-wallet-type duplicate detection (#115).
2026-02-27: v0.1.0 tagged.
2026-02-24: Initial scaffolding: popup UI, BIP-39 wallet creation via ethers.js, wallet persistence, real ETH balances over RPC, ENS forward and reverse resolution.

Future Steps

Only work that has no issue of its own belongs here; everything else is on the tracker.

Pre-1.0 security review of the extension (key handling, DEBUG mode policy, RPC input validation) before any 1.0rc tag. Individual filed issues are parts of it, but the review is broader than any of them.
Decide whether docker-in-docker makes make test-e2e runnable in the Gitea workflow. Extending the suite itself is tracked as #183 and #184.
Cut 1.0.0 once the milestone is empty, then continue tagging as milestones land.