feat(swap-service): dispute a claim on a transaction an older quote holds

[kaladinlight]

Description

resolveAttributionFromChain evaluates one swap at a time, so several quotes on the same sellTxHash each precede that transaction independently — every one of them can be honest, and no timestamp distinguishes them. It answers whether a quote came before its transaction; it cannot answer whether that transaction has already been attributed.

resolveAttribution now settles that second question. Among the quotes on a transaction the earliest takes it, and the rest are recorded DISPUTED with reason: 'quote-superseded' — the quotes are genuinely distinct, one is simply outranked.

• Ties break on swapId, so the winner is stable across runs rather than depending on row order.
• The contest only runs on a swap that would otherwise be ACCEPTED; an outright rejection is the stronger finding and stands.
• A preceding quote necessarily precedes the block too, so its own verdict needs no separate check.
• DISPUTED has been declared in the schema and written by nothing until now, and the payout gate from fix(swap-service): drop the block time tolerance and gate payouts on attribution #65 already withholds it.

Quotes can arrive out of order, so the earliest one settles the whole transaction rather than only itself: if a later quote was accepted before its predecessor was registered, the predecessor demotes it on resolution. Without that, two quotes on one transaction could both end ACCEPTED, and since only PENDING swaps are polled, nothing would ever revisit either. The sweep runs before the swap's own write, so a failure leaves it pending and retrying rather than leaving an incorrect accepted quote in place.

The contest is scoped by chain. A pre-EIP-155 transaction carries the same hash on every EVM chain, so matching sellTxHash alone would let unrelated swaps contend and let the sweep demote another chain's legitimately accepted quote. Both queries now filter on sellAsset.chainId, the way the block time lookup already does.

Also names these checks after the question each answers, in the vocabulary the codebase already uses — quote-precedes-tx established "precedes" as the word for this relation:

before	after
resolveQuoteBinding	resolveAttributionFromChain
checkQuoteBinding	resolveAttribution
holdsOldestClaim	hasPrecedingQuote

and names the verdict pair once as AttributionVerdict, so the DISPUTED branch is checked against AttributionDetails instead of asserted past the compiler. The superseded verdict keeps the blockTime and quotedAt behind it, since a disputed row is the one someone has to adjudicate.

A write-time guard refusing superseded registrations was tried and reverted: it discarded the whole swap record — polling, notifications, verification, history — to avoid storing a row whose verdict was already known.

Testing

• apps/swap-service: 103 tests. Five cover the contest — earliest accepted, later disputed, a late-arriving predecessor demoting the incumbent, a loser sweeping nothing, and an uncontested quote unaffected.
• The Prisma JSON path filter for sellAsset.chainId was verified against a live database, not only typechecked: a same-chain lookup returns the row and a wrong-chain lookup returns null.

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📝 Walkthrough

Walkthrough

The swap service now prevents duplicate preceding-quote attribution and resolves attribution contests using chain verdicts, quote ordering, and dispute updates. Polling uses the new resolver. Tests cover contest outcomes and creation guards.

Changes

Swap attribution

Layer / File(s)	Summary
Attribution verdict contract and chain resolution apps/swap-service/src/swaps/types.ts, apps/swap-service/src/swaps/utils.ts, apps/swap-service/src/swaps/__tests__/utils.test.ts	Adds AttributionVerdict and renames the chain resolver to resolveAttributionFromChain. Existing utility tests use the new API.
Preceding quote creation guard apps/swap-service/src/swaps/swaps.service.ts, apps/swap-service/src/swaps/__tests__/create-swap-attribution.test.ts	createSwap rejects swaps that reuse a transaction held by an earlier quote. Tests cover rejection, storage, and missing lookup fields.
Attribution contest resolution and polling apps/swap-service/src/swaps/swaps.service.ts, apps/swap-service/src/polling/swap-polling.service.ts, apps/swap-service/src/swaps/__tests__/attribution-contest.test.ts, scripts/affiliate-payouts/utils.ts	resolveAttribution orders claims, disputes superseded claims, persists verdicts, and runs from polling. Contest tests cover accepted, disputed, demoted, and uncontested claims. Affiliate payout messages use updated attribution wording.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🟡 Moderate · up to cd18d

This can discard duplicate claim records, leave a transaction without an accepted claim after a partial write failure, and overstate referral fees for disputed swaps. Resolve these attribution and payout issues before merge.

Sequence Diagram(s)

sequenceDiagram
  participant Polling as swap-polling.service
  participant SwapsService
  participant Chain as resolveAttributionFromChain
  participant Prisma
  Polling->>SwapsService: resolveAttribution(swap)
  SwapsService->>Chain: resolve chain attribution verdict
  Chain-->>SwapsService: AttributionVerdict
  SwapsService->>Prisma: find earliest quote for transaction
  Prisma-->>SwapsService: preceding quote
  SwapsService->>Prisma: update attribution status and details

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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 8 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: disputing a claim when an older quote already holds the transaction.

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Actionable comments posted: 3

🤖 Prompt for all review comments with AI agents

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Inline comments:
In `@apps/swap-service/src/swaps/swaps.service.ts`:
- Line 176: Update createSwap to remove the assertNoPrecedingQuote rejection and
allow prisma.swap.create to persist superseded swaps with the default PENDING
attribution status, so resolveAttribution can record quote-superseded disputes.
Ensure client-provided quotedAt is not treated as trusted attribution authority;
use trusted quote provenance when determining precedence.
- Line 339: Update resolveAttribution so the swap.updateMany sweep and the
subsequent swap.update accepting write execute within one Prisma $transaction.
Ensure both writes use the transaction-scoped client and preserve the existing
ACCEPTED handling and payout-state invariant on failure.
- Around line 339-342: Update calculateReferralFees so its baseWhere query
filters swaps by attributionStatus: 'ACCEPTED', ensuring aggregateFees excludes
disputed attribution claims while preserving the existing successful web-swap
filters.

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📥 Commits

Reviewing files that changed from the base of the PR and between 4f32c29 and cd18dab.

📒 Files selected for processing (8)

• apps/swap-service/src/polling/swap-polling.service.ts
• apps/swap-service/src/swaps/__tests__/attribution-contest.test.ts
• apps/swap-service/src/swaps/__tests__/create-swap-attribution.test.ts
• apps/swap-service/src/swaps/__tests__/utils.test.ts
• apps/swap-service/src/swaps/swaps.service.ts
• apps/swap-service/src/swaps/types.ts
• apps/swap-service/src/swaps/utils.ts
• scripts/affiliate-payouts/utils.ts

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