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WalkthroughThe pull request adds delegatee-envelope recognition and stamping to receive flows. It skips covclaimd reveals for delegatee packets and adds tests for new and adopted funding. Documentation describes setup, packet handling, payout and receiver constraints, and discovery limits. ChangesDelegatee-backed offline receive
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Feature Suggested reviewers: Merge Risk: ⚪ Minimal · up to
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The title clearly and concisely describes the main change: supporting delegatee offline receive packets without covclaimd Reveal calls. |
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Actionable comments posted: 1
- 🪄 Fix comments: Fix CodeRabbit comments on this PR
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Review comments at @docs/delegatee-offline-receive.md:
- Around line 7-10: Update the instructions around the SDK swap client’s offline
receive configuration to use only APIs available in the repository’s pinned
@arkade-os/swap version. Remove unsupported references to offlineReceive and
RestDelegateeProvider, and document a compilable flow using the available
RestDelegateProvider API without presenting renewal delegation as offline
receive.
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docs/delegatee-offline-receive.md
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@coderabbitai review Please review the current head, including the follow-up addressing the initial feedback. The green status on the updated commit reports a rate limit and does not establish review coverage for that commit. |
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Review — docs/delegatee-offline-receive.md
Documentation-only addition; no solver runtime changes. Verified the documented claims against the implementation at head.
Accuracy check
| Claim | Verdict |
|---|---|
| Solver recovers preimage from claim witness | ✓ claimIdentity.ts + covclaimdClaim.e2e.test.ts both confirm: preimage extracted from ConditionWitness on the claim spend, never from the RFQ payload. |
| No solver-side delegatee URL required | ✓ Solver only needs to observe the claim transaction; COVCLAIMD_URL is unrelated and confirmed still present in .env.sample. |
COVCLAIMD_URL / covclaimd reveal path unchanged |
✓ fundLockup.ts + covclaimd.ts untouched on this branch. |
| Companion APIs not yet in pinned SDK/swap versions | ✓ Correctly flagged; the companion PRs are referenced but unmerged. |
Findings
docs/delegatee-offline-receive.md:20 — "type-4 covclaimd packet" unexplained
CLAIM_PACKET_TYPE is imported from @arkade-os/swap in claimPacket.ts, but its numeric value is not visible in this repo and is never defined in any existing docs file. "type-4" will be opaque to any reader who doesn't have the swap package source. Consider either glossing it ("the legacy claim_packet type byte (0x04) used by covclaimd…") or linking to docs/environment.md § "covclaimd wire protocol" where the packet format is partially recovered.
docs/delegatee-offline-receive.md:21–23 — silent stranding failure mode
The warning "Do not send a delegatee secret envelope as a legacy claim_packet" is correct and important, but the consequence is only inferable from the code. In claimPacket.ts, a delegatee envelope resolves to { kind: 'ciphertext' }, causing claimPacketStamp to return undefined; fundLockup.ts then omits the stamp entirely, so neither the covclaimd reveal path nor the delegatee indexer path sees the packet. The lockup is funded but neither party claims it until the claim deadline. A one-sentence consequence note ("the lockup will not be claimed by either path; the swap will time out") would sharpen the warning for operators debugging an incident.
docs/delegatee-offline-receive.md:11–12 and 18–19 — "trusted template" not defined
"Deploy delegatee with the trusted template" appears twice but there is no link and no definition of what this template is, where it lives, or how to obtain and verify it. An operator enabling this feature needs that reference. Link to the anticipated delegatee#5 documentation or add a note indicating where the template will be published once the companion PR merges.
No security issues found in this change
The documented preimage-in-witness property is enforced by the existing implementation and is not weakened by this PR. The warning about misrouting a delegatee envelope is a correct and needed guardrail — the only observable symptom of the error would be a timed-out swap, not a fund-loss event, because the solver never funds until the quote is accepted and the lockup is valid.
No cross-repo breakage: the ts-sdk and delegatee repos are modified in the companion PRs (referenced in the PR body), not here. Grep of the local clones (go-sdk, rust-sdk, dotnet-sdk) for claim_packet, covclaimd, and offline_receive finds no consumers that would be affected by this documentation addition.
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Follow-up pass — 1 new commit (e8b13b6), docs-only. 0 of 3 prior findings fixed; 3 remain open (one improved).
Prior findings status
Finding 1 — `type-4 covclaimd packet` unexplained (docs/delegatee-offline-receive.md:22)
Still open. Unchanged by this commit. "The older type-4 covclaimd packet" still appears without an explanation of the byte value or a link to the wire-format documentation.
Finding 2 — Silent stranding failure mode (docs/delegatee-offline-receive.md:23–25)
Still open. Unchanged. The warning "Do not send a delegatee secret envelope as a legacy `claim_packet`" still lacks a consequence sentence. An operator debugging a timed-out swap in production would benefit from knowing that the lockup is funded but neither claim path sees it.
Finding 3 — "trusted template" not defined (docs/delegatee-offline-receive.md:12, 20)
Still open, improved. The new paragraph explicitly references delegatee#5, which partially satisfies my original suggestion to link to the companion PR. However, "deploy delegatee with the trusted template" still gives no definition of what the template is, where it lives, or how an operator verifies it. The delegatee#5 link provides a breadcrumb, but that PR is unmerged; this doc should at minimum say "the trusted template referenced in delegatee#5" or defer the phrase entirely until that PR lands.
Incremental diff assessment (e8b13b6)
The added paragraph directly addresses the coderabbitai concern (APIs not yet in the pinned SDK) without removing the forward-looking content. That is the right approach — contextualising rather than truncating. The language is accurate: the pinned SDK and swap versions do not include those APIs, and the two companion PRs are correctly identified.
One minor clarity note on the new text: docs/delegatee-offline-receive.md:12 — "before enabling the option" is slightly ambiguous out of context. A reader who hasn't yet reached the offlineReceive paragraph won't know which option is meant. Tightening to "before enabling the offlineReceive option" would make the paragraph self-contained.
No protocol, security, or cross-repo impact — this is pure documentation. No new findings beyond the above.
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Follow-up pass — 1 new commit (731317f): feat: transport delegatee claims in receive funding packets. All 3 prior findings resolved; 1 new minor finding.
Prior findings status
Finding 1 — type-4 covclaimd packet unexplained
Fixed (731317f). Step 2 of the numbered list now reads: "The extension packet type is 0x04, shared with covclaimd." The byte value and shared ownership are both explicit.
Finding 2 — Silent stranding failure mode
Fixed (731317f). The warning and the root risk are gone. claimPacketStamp now detects the delegatee prefix and routes it correctly before the covclaimd path is ever reached; revealToCovclaimd short-circuits on isDelegateeClaimPacket. Misrouting the envelope is now structurally prevented at the code level, not just a doc-warned footgun.
Finding 3 — "trusted template" not defined
Fixed (731317f). The doc now links directly to templates/offline_receive.json on the feat/delegatee-offline-receive branch and explains that it is loaded as an operator-trusted default. That satisfies the original request for a concrete reference.
Incremental diff (731317f)
packages/solver-corridors/src/receive/claimPacket.ts
isDelegateeClaimPacket is a straightforward prefix check: base64-decode, then compare the first 23 bytes against the hardcoded TLV [0x7F, 0x00, 0x14, ...marker]. The test fixture in test/support/delegateePacket.ts independently constructs the same prefix with the same two-byte big-endian length helper, so the detection function and the fixture agree.
claimPacket.ts:44 — guard fires at stamp time, not quote time (packages/solver-corridors/src/receive/claimPacket.ts line 44):
if (!arkadeScript) throw new Error('delegatee claim packet requires a noninteractive claim leaf')claimPacketStamp is called from the funding path, after the quote has been accepted. If nonInteractiveClaimArkadeScript is absent (e.g., a covenant script built without the offline-receive template), the error surfaces during tick(), not at admission. Whether this results in a funded-but-unstampable lockup depends on where claimPacketStamp sits in the call chain relative to PSBT broadcast. The existing covclaimd path has a similar guard (checked in revealToCovclaimd), but it fires even later. Worth adding a quote-time pre-check that a delegatee packet and the absence of nonInteractiveClaimArkadeScript are incompatible — fail the quote rather than the tick.
packages/solver-corridors/src/receive/onchainOrchestrator.ts and orchestrator.ts
Both adopted-funding guards are correct:
- Lightning path (
orchestrator.ts:1109):isDelegateeClaimPacketshort-circuitsrevealToCovclaimd. Correct — covclaimd has no delegatee envelope, and the solver learns the preimage from the claim witness. - Onchain path (
onchainOrchestrator.ts:752–756): the three-way condition (stampedAt === null && claimPacket !== null && !isDelegateeClaimPacket(...)) correctly handles all four cases: (i) new funding + legacy → Reveal; (ii) new funding + delegatee → stamp only, no Reveal; (iii) adopted + legacy → Reveal; (iv) adopted + delegatee → neither (correct per the documented limitation).
test/support/delegateePacket.ts and test files
The TLV encoding in delegateePacket() is consistent with delegateePrefix in isDelegateeClaimPacket. The adopted/non-adopted parameterisation covers the key routing fork in both orchestrators. The stamp structure assertion stamp.packet[packet.length] === 2 (TLV tag 0x02 for the appended covenant script) is a direct and useful invariant check.
docs/delegatee-offline-receive.md
The rewrite is accurate against the implementation. The four-step numbered flow matches the code: stamp without decryption (solver), filter by marker+key (delegatee), learn preimage from claim witness (solver). The last paragraph's "no replay cursor" limitation is an important operational constraint and is correctly stated. No accuracy issues found.
No protocol, security, or cross-repo issues in this increment. The single actionable item (quote-time guard for missing noninteractive claim leaf) is low severity — the error would surface before broadcast if claimPacketStamp is called in the pre-signing path, which appears to be the case from the existing flow, but a belt-and-suspenders check at admission would close the window entirely.
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Superseded by #348 for the current binary sealed-terms packet. The separate JSON-envelope protocol in this branch is no longer needed. The replacement preserves standard packet framing and legacy Reveal behavior; onchain corridor restoration remains outside its scope. |
Receive funding now transports versioned delegatee envelopes without calling a delegatee API. Previously the pinned swap classifier treated the larger encrypted envelope as legacy ciphertext, so it was not stamped and adopted funding could send it to covclaimd Reveal.
delegatee-secrets/v1TLV127 prefix and carry the opaque type-4 packet into funding with the solver's own TLV2 covenant script and full taptree. No unpublished SDK dependency is required for the server change.Companions: ts-sdk #1090, stacked on the existing delegatee SDK PR #972, and delegatee #5. Deploy compatible solver/delegatee versions and upgrade receiving applications before enabling offlineReceive. The SDK/swap versions pinned here do not expose that new client option.
The receiver seals the preimage, recipient and minimum payout before the RFQ; the envelope authenticates that intent, not the complete later quote or refund deadline. Neither client nor solver registers individual claims with delegatee. The operator can decrypt the preimage and must be trusted. Delegatee must observe the funding packet while connected; persisted watches survive restart, but the live stream cannot replay entirely unseen funding. An adopted output without a discoverable packet cannot be repaired by an API fallback.
Validation: