fix(#202): wait for the daemon reply before persisting a dispute - #275
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Walkthrough
ChangesDispute correlation flow
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The PR prevents disputes from being saved before the daemon accepts them, but timeout-and-retry or interruption races can still leave an order marked disputed without the corresponding local dispute record and daemon dispute ID. Merge should wait for this recovery risk to be fixed or explicitly accepted by the owner. Sequence Diagram(s)sequenceDiagram
participant Client
participant open_dispute
participant orders_dispatch
participant Daemon
participant dispute_store
Client->>open_dispute: Open dispute
open_dispute->>orders_dispatch: Register request nonce
open_dispute->>Daemon: Publish correlated Dispute action
Daemon-->>orders_dispatch: DisputeInitiatedByYou or CantDo
orders_dispatch-->>open_dispute: Matching response
alt accepted with daemon dispute ID
open_dispute->>dispute_store: Persist dispute and update status
else rejected or timed out
open_dispute-->>Client: Return error
end
Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Linked Issues checkExplanation The implementation addresses issue Full details: Out of Scope Changes checkExplanation Most changes support issue Full details: Docstring CoverageExplanation Docstring coverage is 92.86% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 28 functions across 4 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches📝 Generate docstrings
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Actionable comments posted: 3
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Verify each finding against current code. Fix only still-valid issues, skip the
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Inline comments:
In `@rust/src/api/disputes.rs`:
- Around line 297-302: Require DisputeAccepted handling in
rust/src/api/disputes.rs at lines 297-302 to extract dispute_id and return
ProtocolError before constructing or persisting Dispute when it is absent;
remove the local UUID fallback while preserving daemon-provided IDs. In
rust/src/api/orders.rs at lines 3308-3311, remove the fallback expectation and
add coverage verifying that an acceptance without a daemon dispute UUID is
rejected and persists nothing.
In `@rust/src/api/orders.rs`:
- Around line 1781-1814: The DisputeInitiatedByYou handling must not allow a
late acceptance with tx: None to fall through and persist only the Dispute trade
status. Update the take_matching_dispute branch in the reply handler to either
return immediately after logging late acceptances or create the
daemon-identified Dispute record before continuing; preserve normal processing
for active requests, and add a test covering timeout followed by acceptance.
- Around line 302-317: Update register_dispute_request to atomically reserve
each trade key before inserting its PendingRequest, rejecting a second
concurrent open_dispute attempt instead of replacing the existing waiter.
Release the reservation when the first attempt completes, including success,
failure, and timeout paths, and preserve the original sender/request
association. Add a concurrent-open test verifying the second attempt is rejected
while the first remains registered.
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rust/src/api/disputes.rsrust/src/api/orders.rsrust/src/mostro/actions.rsspecs/004-mostro-p2p-client/contracts/disputes.mdspecs/004-mostro-p2p-client/contracts/orders.mdspecs/004-mostro-p2p-client/data-model.md
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Prevent second open_dispute from replacing first attempt's pending record by checking insert freshness. Previously both concurrent calls would derive same trade key, second would overwrite first's pending entry, stranding first waiter on NoDaemonResponse. Add test coverage for in-flight guard rejection (#275).
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⚠️ Outside diff range comments (1)
specs/004-mostro-p2p-client/contracts/orders.md (1)
255-264: 🗄️ Data Integrity & Integration | 🟠 Major | ⚡ Quick winScope deletion to taker-side rows.
These lines state that every
Pending/WaitingBuyerInvoice/WaitingPaymentrow is deleted onCanceled. Line 279 requires a maker row to be resynced toPendingafter a timeout republish. Keep the maker row and define the maker/taker condition explicitly. Otherwise, the cancellation handler can delete data that the republished order still needs.🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@specs/004-mostro-p2p-client/contracts/orders.md` around lines 255 - 264, Update the cancellation semantics around the Canceled path to delete only taker-side never-active rows, not every Pending/WaitingBuyerInvoice/WaitingPayment row. In the orders contract text and any matching cancellation handler logic, make the maker/taker distinction explicit using the existing Canceled/TradeUpdate semantics so a maker row can still be resynced to Pending after timeout republish, while taker-side rows are deleted and active/history trades keep status Canceled.
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Outside diff comments:
In `@specs/004-mostro-p2p-client/contracts/orders.md`:
- Around line 255-264: Update the cancellation semantics around the Canceled
path to delete only taker-side never-active rows, not every
Pending/WaitingBuyerInvoice/WaitingPayment row. In the orders contract text and
any matching cancellation handler logic, make the maker/taker distinction
explicit using the existing Canceled/TradeUpdate semantics so a maker row can
still be resynced to Pending after timeout republish, while taker-side rows are
deleted and active/history trades keep status Canceled.
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rust/src/api/disputes.rsrust/src/api/orders.rsspecs/004-mostro-p2p-client/contracts/disputes.mdspecs/004-mostro-p2p-client/contracts/orders.mdspecs/004-mostro-p2p-client/data-model.md
🚧 Files skipped from review as they are similar to previous changes (4)
- specs/004-mostro-p2p-client/data-model.md
- specs/004-mostro-p2p-client/contracts/disputes.md
- rust/src/api/disputes.rs
- rust/src/api/orders.rs
… placeholder When claiming a peer-initiated placeholder during the open_dispute race window, adopt the daemon's dispute ID instead of keeping the locally-minted placeholder ID. The peer path never sees the daemon's ID, while an accepted open carries it; discarding it would lose the authoritative identifier. Add test coverage for ID preservation during claim (#275 review).
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Strict review: changes requested
I would not approve this yet.
Blocking issue:
open_disputestill persists a locally generated dispute id when the accepted daemon reply does not carry aPayload::Disputeid. That contradicts the new daemon-id contract this PR introduces: the solver and Kind 38386 dispute events use the daemon UUID, so a locally generated fallback can recreate an unjoinable local dispute record. The late-acceptance reconciliation has the same fallback. Please fail closed instead: treat an acceptance without a daemon dispute UUID as a protocol error / unreconcilable malformed acceptance and persist nothing, and add a focused test for that case.
I verified the rest of the previously raised concurrency/late-acceptance concerns on the current head: the in-flight guard, placeholder id adoption, and late-acceptance reconciliation tests are present and pass locally.
Local verification run:
cargo test --lib→ 248 passed, 8 ignored.
Reject malformed acceptances that carry no dispute_id in both open_dispute and record_late_acceptance. Dispute.id is contractually the daemon's identifier; minting a local fallback would create a record indistinguishable from a genuine one while being wrong. A conforming daemon always sends it (mostro src/app/dispute.rs notify_dispute_to_users), so this is a protocol-violation guard. Add test coverage for late acceptance rejection (#275
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Inline comments:
In `@rust/src/api/disputes.rs`:
- Around line 475-491: The upsert update closure around upsert_or_update must
claim only an existing InReview, non-initiator, reason-less placeholder with a
solver, preserving its solver and status while replacing its local ID with the
daemon dispute ID and setting initiated_by_me to true. Leave all other records
unchanged, and update a_late_acceptance_leaves_an_existing_record_alone to cover
this race while retaining a separate completed-retry preservation test.
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Strict re-review: changes requested
The previous daemon-id fallback blocker is fixed on this head, but I would still not approve yet.
Blocking issue:
- The late-acceptance reconciliation still leaves an admin-created placeholder unchanged. If
open_disputetimes out, thenadmin-took-disputecreates the peer-style placeholder before the correlatedDisputeInitiatedByYouacceptance is processed,record_late_acceptancecallsupsert_or_update(..., |_| Ok(()))and keeps the local placeholder id plusinitiated_by_me: false. That loses the daemon dispute id and ownership proof from the correlated acceptance, so the local record still violates the daemon-id contract in this race.
Please make record_late_acceptance claim only the placeholder shape that proves this race (InReview, non-initiator, no reason, solver present): preserve the solver/status, replace the local id with the daemon dispute id, and set initiated_by_me = true. Leave completed retry records unchanged. Add a focused test for that interleaving; the current a_late_acceptance_leaves_an_existing_record_alone test actually codifies the buggy behavior.
Verification:
cargo test --libpasses on the current head: 249 passed, 8 ignored.- A temporary focused test for the placeholder interleaving fails on this head: the record keeps the placeholder UUID instead of adopting the daemon UUID.
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Strict re-review: approved
The latest head fixes the remaining daemon-id reconciliation blocker. I re-checked the prior concerns on the current commit:
- Missing daemon dispute ID now fails closed and persists nothing.
- Late acceptance with no local record creates a daemon-ID-backed dispute.
- Late acceptance racing an admin-created placeholder now claims only the placeholder shape, preserves solver/status, and adopts the daemon dispute ID plus initiator ownership.
- A successful retry record is left untouched.
Local verification:
cargo test --lib -- --nocapture→ 250 passed, 8 ignored.cargo clippy --locked -- -D warnings→ passed.
No blocking issues remain from my review.
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@AndreaDiazCorreia please do rebase to fix the conflicts
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open_dispute persisted the local Dispute record as soon as the publish succeeded, but a publish is not an acceptance. The daemon answers a dispute the trade is not eligible for with CantDo, and that rejection had no pending request to resolve, so it was dropped and the dispute stayed locally Open forever. The Dispute message now carries a random u64 request_id nonce and registers a pending request before publishing, exactly like create, take and add-invoice. Only a DisputeInitiatedByYou echoing that nonce creates the record, stored under the dispute UUID the daemon assigned — the id its Kind 38386 event and the solver refer to. An acceptance without that id fails closed instead of minting a local one indistinguishable from a real one; a rejection surfaces the daemon's reason; a timeout returns NoDaemonResponse having persisted nothing. An acceptance that lands after the timeout is still reconciled: its status update moves the trade to Dispute either way, so dropping the record would leave a disputed trade with no dispute to open and no solver to reach. When a solver was assigned inside that window the record already exists as the peer-style placeholder, and the correlated acceptance proves it is ours, so it is claimed — daemon id and initiator flag replace the locally minted ones while the solver and InReview survive. is_peer_placeholder holds that shape test for both claim paths. The open is single-flight per trade: two concurrent calls derive the same trade key, so the second registration would replace the first one's pending record and strand its waiter on a timeout the daemon never caused. Rebased onto the current main: the correlation registry now lives in mostro::pending (#120), so the dispute record kind, its matcher and the registration helper go there alongside the take and add-invoice ones, and the waiter channel carries a Wake (#259) rather than a bare DaemonReply.
The disputes contract now states what open_dispute waits for, that only the correlated acceptance persists a record, how a late acceptance and the peer-opened placeholder are reconciled, and the fail-closed guard on an acceptance with no dispute id. The orders contract lists open_dispute among the request-correlated calls, and the data model records that Dispute.id is the daemon's for a dispute we opened while a peer-opened one is still known locally under a minted UUID.
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Inline comments:
In `@rust/src/mostro/actions.rs`:
- Around line 205-221: Add a focused asynchronous wire-contract test for dispute
that invokes dispute, decrypts the resulting event, and asserts the order UUID,
request_id, trade index, Dispute action, and empty payload; keep the test
targeted to the existing protocol/test harness and avoid unrelated changes.
In `@rust/src/mostro/pending.rs`:
- Around line 342-351: Update register_dispute_request and the pending dispute
storage used by take_matching_dispute so a retry for the same trade key cannot
overwrite a timed-out request; retain and correlate entries by trade key plus
request_id, or reject the retry until the existing request resolves or expires.
Preserve the path that lets orders.rs call record_late_acceptance for the
original request, and add a regression test covering timeout, retry
registration, and late acceptance.
In `@specs/004-mostro-p2p-client/contracts/orders.md`:
- Around line 16-18: Update the late-reply contract in orders.md to state that a
genuine late dispute reply is reconciled by record_late_acceptance and persists
the accepted dispute using the daemon-assigned ID, rather than being logged and
dropped. Keep the documented timeout result as NoDaemonResponse with no
immediate persistence.
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Strict review: changes requested
I re-reviewed the rebased current head (3fa2845b). CI is green and the previous daemon-id fallback / late-placeholder blockers are fixed, but one blocking race remains.
Blocking issue:
- A retry after
open_disputetimes out overwrites the original timed-out pending dispute request for the same trade key. If the daemon later accepts the first request,take_matching_dispute(trade_pubkey_hex, old_request_id)no longer finds it, sorecord_late_acceptanceis never called. The message then falls through as a status update, recreating the split state this PR is meant to prevent: the trade can move toDisputewithout the daemon-ID-backedDisputerecord.
Secondary issue:
- The orders contract still says late dispute replies are "logged and dropped", but the implementation intentionally reconciles them through
record_late_acceptancewhen the original pending record survives.
Verification:
cargo test --libpasses on the clean current head: 298 passed, 8 ignored.- A temporary focused regression probe for timeout → retry registration → original late acceptance fails on this head because the first request is overwritten by
register_dispute_request.
I am not duplicating CodeRabbit's active inline threads beyond this verified verdict; the pending-request overwrite is still a blocker on the current head.
…late acceptance reconciliation
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Review: changes requested
The bounded superseded-nonce list reintroduces the split state this PR is designed to prevent. After more than eight timed-out retries for the same trade key, register_dispute_request drops the oldest nonce. A delayed but genuine DisputeInitiatedByYou for that dropped attempt then returns None from take_matching_dispute; it falls through to the normal status arm, which changes the trade to Dispute without calling record_late_acceptance. The client again has a disputed trade with no daemon-ID-backed dispute record or solver context.
Please either retain every still-answerable timed-out nonce until it is resolved/rejected or make the retry limit fail closed (rather than discarding correlation state). Add a regression test that exceeds the bound and delivers the oldest acceptance, asserting reconciliation rather than a status-only update.
The focused dispute tests pass locally (31 passed). Note that the Web CI check is still in progress; this blocker is independent of that pending check.
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Approved
Re-reviewed the current head. The nonce-retention fix removes the cap, preserves every still-answerable timed-out dispute nonce, and adds a regression test proving the oldest retained nonce reconciles without displacing the live waiter. The prior blocker is resolved.
Local verification: cargo test --locked mostro::pending::tests::every_superseded_dispute_nonce_stays_answerable -- --exact (1 passed) and cargo clippy --locked -- -D warnings passed. GitHub Rust, Flutter, and Web checks are green.
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Reviewed at e139591, merged locally against current main (3641db9 — the branch is 14 commits behind and merges clean). On that merge: 305 Rust tests pass, cargo clippy --locked -- -D warnings and cargo check --locked --target wasm32-unknown-unknown — the exact CI commands — are clean. No Dart changes, and no FRB surface change (open_dispute keeps its signature, record_late_acceptance is pub(crate), dispute_id_from_payload is private).
Nothing here is broken. I verified the whole path end to end by writing the tests that are missing, and they pass. Both asks below are small, and one of them is a single sentence.
Blocking: the seam this PR creates is not covered by any test that runs the real code
The two central tests assert a copy of the logic rather than the logic:
a_cantdo_rejection_reaches_the_waiting_open_disputere-implements theAction::CantDoarm inside the test itself —take_matching_restore(key).or_else(|| take_matching_request(key, Some(73))), under the comment "Exactly what theAction::CantDoarm does to find its caller" — and then sends theWakeby hand. It never callsdispatch_mostro_message. Add akindgate to that arm and the test stays green while #202 comes back exactly as reported: the rejection matches no pending request and is dropped.take_matching_dispute_only_consumes_dispute_recordscovers the matcher, not the dispatcher'sif kind.action == Action::DisputeInitiatedByYouarm, and not the claim that the acceptance still falls through to the status arm.
This is the one place the PR asks to be trusted on, so it should be the one place a test drives the real dispatcher. The module already has that harness: a_late_cancel_for_a_superseded_generation_is_dropped builds an UnwrappedMessage with sender = active_mostro_pubkey() and calls dispatch_mostro_message directly.
Two tests are enough, and I confirmed on your branch that both pass as written, so this is missing coverage rather than a defect:
- Acceptance. Register a dispute request, seed the order as
Active, dispatch aDisputeInitiatedByYoucarrying that nonce and aPayload::Dispute(uuid, None), then assert the waiter receivesDisputeAcceptedwith the daemon's id and that the order ends upDispute— that second assertion is what pins the "falls through to the status arm" claim the comment makes. - Rejection. Register a dispute request, dispatch a
CantDocarrying that nonce withPayload::CantDo(Some(NotAllowedByStatus)), and assert the waiting caller receivesRejected. That is #202 itself, driven through the arm that was dropping it.
Two notes that cost me a compile each: CantDoReason is re-exported from mostro_core::error, not ::message, and Wake has no Debug, so the non-matching arm can't format it.
Blocking: "the whole record is purged when the trade's subscription ends" is not true in the common case
That sentence appears twice — in the doc-comment on PendingRequestKind::Dispute { superseded } and in contracts/disputes.md — and it is the justification for deliberately not capping the superseded list after the cap was pushed back on.
purge_pending_request has exactly one production caller: the exit of subscribe_daemon_messages (orders.rs:1299). That watcher only exists for trades created, taken or restored in this process. A dispute opened on a trade loaded from the database after an app restart has no per-trade watcher — its daemon messages arrive over the global mostro-dm feed — so its pending record, superseded list included, lives for the life of the process. Nothing purges it.
The decision itself still holds: the list only grows through user-driven retries, each gated by a 10-second wait, at eight bytes each. But the stated reason is wrong, and in specs/ — a living contract — it reads as a bound that does not exist. One sentence fixes it in both places.
Minor
DisputeAlreadyOpenis not mapped inlib/core/daemon_errors.dart. The new single-flight refusal ("an open_dispute for trade … is already in flight") falls through to the genericopenDisputeFailed, as does the pre-existing "a dispute already exists". Not a regression — the marker was already missing — but this PR adds a second trigger for it. One line in the mapper plus a key in the five.arbfiles.- The
CantDoreason is lost at the UI.bail!("{message}")produces the daemon's English prose, which matches no marker, so Dart shows the generic fallback. The user learns the dispute failed but not that it wasNotAllowedByStatus— which is precisely the #203 case this is meant to make legible. That is the debt CLAUDE.md already records ("someCantDoerrors still return English prose directly — should become markers"), so a follow-up rather than a change here, but worth an issue. - A superseded nonce is never removed once it has been reconciled as
Late. Harmless, but the list then claims attempts are still outstanding when they are not. One line if you want it honest.
…n bound The two central tests asserted a copy of the logic rather than the logic: the CantDo test re-implemented the arm's own lookup and sent the Wake by hand, and the matcher's test never reached the DisputeInitiatedByYou arm. Both now drive dispatch_mostro_message itself, so a kind gate on the CantDo arm or a lost fall-through leaves them red instead of green while #202 comes back. The acceptance test also pins the fall-through the arm's comment claims: the same reply that wakes the caller with the daemon's dispute id moves the trade to Dispute. The record's lifetime was documented as bounded by the trade's subscription. It is not: purge_pending_request runs only when a per-trade watcher exits and open_dispute starts none, so a dispute on a trade loaded from the database after a restart — answered over the global feed — keeps its record for the life of the process. The retention decision stands on the retry rate alone, and a superseded nonce now leaves the list as soon as its reply is reconciled, so the list never names an attempt already answered. DisputeAlreadyOpen reached Dart unmapped, and this change set adds a second trigger for it (the single-flight refusal), so both refusals now resolve to one localized message instead of the generic open-dispute failure. The CantDo reason is still lost at the UI as English prose — tracked in #373.
2 participants
Closes #202
Problem
open_disputetreated a successful relay publish as a successful dispute: it persistedDispute { status: Open }right after publishing and never registered a pending-request waiter. TheDisputemessage also carried norequest_id, so the daemon'sCantDorejection matched nothing in the dispatcher and was dropped (no matching pending request, ignoring event). The dispute stayed locally Open and the UI navigated to the dispute detail — a false success.Fix
The Dispute message now carries a
request_idnonce, which the daemon echoes in bothDisputeInitiatedByYouandCantDo(verified in mostrosrc/app/dispute.rsandsrc/app.rs).open_disputeregisters a pending record before publishing and waits up to 10 s, exactly likecreate_order/take_order/send_invoice. It persists only on a correlated acceptance; rejection and timeout return an error and write nothing.The acceptance also carries the daemon's dispute UUID — the id its Kind 38386 event and the solver refer to — so the record is stored under it instead of a locally minted one.
No Dart changes:
_openDisputealready showed a localized SnackBar and rethrew without navigating, so propagating the error was enough.Notes
The daemon replies
CantDoonly forMostroCantDocauses. A duplicate dispute or a daemon-side DB failure is an internal error it merely logs, so those surface asNoDaemonResponserather than a precise reason.Verification
cargo build,cargo clippy --locked -- -D warnings,cargo test(238 pass),flutter analyze,flutter test(195 pass).frb-generate.shproduces no drift — the public bridge surface is unchanged.Tests cover the correlation layer, where the bug was: the kind/nonce gates of
take_matching_dispute, aCantDoreaching the waiting caller through the dispatcher's lookup, and the dispute-id extraction. The end-to-end path needs a live daemon — pending manual check with the #203 repro.Follow-ups (not in this PR)
data-model.md.fiat_sent,releaseandcancelstill send no nonce and await no reply — the same false-success shape as this issue, in other actions.Summary by CodeRabbit
New Features
Bug Fixes
Documentation