[jxom]

Ports the viem main fixes of the past day (wevm/viem#5298 to wevm/viem#5304) that apply to Ox. #531 backports the same changes to 0.x.

Fix	Ox change
wevm/viem#5299	Siwe.createMessage accepts a punycode top-level domain, such as example.xn--p1ai, and rejects a top-level domain label longer than 63 characters. Same regex as viem, except that the new alternation is non-capturing, so the port stays in group 3 of the exported Siwe.domainRegex.
wevm/viem#5304	EIP-7702 permits any authorization y_parity below 2**8. Authorization.fromRpc, Authorization.fromTuple, and Authorization.toTuple threw Signature.InvalidYParityError for a yParity above 1, so TxEnvelopeEip7702.deserialize, serialize, and hash, and Transaction.fromRpc, failed on valid mainnet transactions. They now read and encode yParity as is. These three and Authorization.toRpc reject a value above 255 with Hex.IntegerOutOfRangeError. r and s keep their validation.

TxEnvelopeEip7702.hash(TxEnvelopeEip7702.deserialize('0x04f8c901…')) // mainnet 0xaec84209…
// Before: Signature.InvalidYParityError: Value `28` is an invalid y-parity value.
// After:  '0xaec8420968abd74e70ef5b3099d6ba7baa3f069c4f718d7c4d729d591cffcb09'

Needs a reviewer's attention: the zod Authorization schemas (Signed, SignedToRpc, TupleSigned) now accept an 8-bit yParity instead of only 0 or 1, so they stay consistent with the core codecs. Their rejection tests now use 0x100. The zod Signature schemas still accept only 0 or 1. Ox also decodes these tuples, which viem's parseTransaction still rejects.

Not ported:

• fix: strip error keyword in normalizeSignature viem#5300 (error keyword in normalizeSignature): Ox already strips it.
• fix: map OutOfFunds node errors to InsufficientFundsError viem#5303 (OutOfFunds to InsufficientFundsError): Ox has no node error mapping.
• fix(wallet): apply sendCalls dataSuffix when a call has no data viem#5301 (sendCalls dataSuffix), fix(op-stack): wait for the dispute game in getTimeToFinalize viem#5298, and fix(op-stack): use the withdrawal's L2 timestamp for super-root games viem#5302 (OP Stack): viem actions only.

Validation: pnpm check:types and vp check on the changed files pass. The core project passes with SKIP_GLOBAL_SETUP=1, except tests that need a local Anvil node and fail the same way on main without these changes. The new tests fail without the fixes.

🤖 Generated with Claude Code

https://claude.ai/code/session_01VLjvB9RWejr3jdFDh3WjiM

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Project	Deployment	Actions	Updated
ox	Ready	Preview	Oct 26, 2026 6:57am UTC

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📝 Code Review	✅ Completed 2026-10-26T06:54:03.313989Z	143e2ad	New commits

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commit: 143e2ad

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Reviewed commit: a613dfa737

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[jxom]

Update: Vercel deployed 5312346 without errors, so the earlier failures were not a persistent break in this PR. The note below stays for reference.

The Vercel deployment of the docs site failed on this PR at a613dfa and c91f602, but this PR does not cause it:

• The same deployment fails on main's own heads: fix: port recent viem fixes to AbiItem, AbiEvent, Signature, TypedData, Hex, and RpcTransport #526 (88b61a2) and the release PR chore: version packages #529 (b2cd3e3). This branch starts from that main.
• This PR changes nothing under site/ or scripts/docgen/, and the full pnpm docs:build (docgen and the Vocs site build) passes locally on this code.
• The 0.x backport, fix(0.x): port recent viem fixes to Siwe and Authorization #531, deploys on Vercel without errors.

The Vercel build logs need access to the Vercel project, which I don't have, so the cause of the earlier failures is unknown.

---

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