fix(platform-wallet): act on swept transactions at the persistence seam

[romchornyi]

Stacked on #4559. Review only this PR's own diff; its base is split/4406-2-storage.
Third of the five PRs #4406 was split into: seam → storage → producer → Swift → Kotlin.
This is the heart of #4406, and the smallest it can be.

Issue being fixed or feature implemented

Nothing yet emits a sweep. This PR bumps the rust-dashcore pin and projects the TransactionsSwept event the bump brings with it, so the seam (#4558) and the store (#4559) finally carry the removal a losing double-spend requires.

The pin bump and the arms are one commit by construction. WalletEvent is not #[non_exhaustive] and platform has four exhaustive matches over it, so new-pin code cannot compile without the arms — and arms that did nothing would be worse than none, because upstream's removal is unconditional (wallet_checker.rs): the wallet drops the losing rows in memory, and a store that keeps them replays them at the next load.

What was done?

The pin

4db5c367 → rust-dashcore dev (21aaafed).

Worth knowing why it moves this far: v4.2-dev was pinned to a curated rebase line (chore/sync-fixes-payload-seam) that deliberately omits the whole sweep chain (#961/#962/#966/#969/#975) but carries #991's set_payload_finalizer, which masternode/update_service.rs now requires. Our previous pin had the reverse. No revision carrying both existed, so this takes dev, which carries everything.

dev also carries rust-dashcore#981, which collapses BIP-39 parsing onto one auto-detecting path. Platform's four hand-rolled "try every wordlist" helpers become that function and the call sites drop their Language argument (13 files). Unrelated to sweeps; it rides here only because the sweep chain and the payload-finalization seam this branch's base already depends on both sit above it on dev.

The producer

• TransactionsSwept → one SweepBatch (core_bridge.rs); is_empty_no_records counts sweeps, so a sweep-only round still reaches the persister.
• Compile-forced arms in balance_handler.rs (routes the post-removal balance snapshot — a sweep is the one event that can lower a balance) and payment_handler.rs (deliberate no-ops; the payment coupling is fix(platform-wallet): couple a sweep's payment flips to their own persistence round #4442).
• spend_observer.rs gains sweep arms that report no observed spend: a sweep's released outpoints are coins that came back free, and the inputs it kept spent are precisely the ones it does not name, so the held set cannot be derived from the event at all.

The gate — what makes every intermediate host state safe

A backend that has not attested CORE_SWEEP_REMOVAL is not known to have applied the round's subtractive half, so its watermark is stripped before the store and the wallet faults exactly as on a rejection. Order is load-bearing: reporting the height durable first and faulting after cannot retract a height a legacy backend already committed. Such a host freezes its sync watermark on the first sweep it meets instead of diverging — fail-closed, funds-safe, and unfrozen the moment its persister ships (#4406's Swift and Kotlin PRs).

Reinstatement

A record arriving after a sweep of the same txid retracts that txid from the folded sweep, since persisters write records before replaying sweeps and would otherwise delete a row the wallet has brought back. The asset-lock half mirrors it: a sweep removes the tracked entry its funding transaction created, and AssetLockChangeSet::merge cancels a folded tombstone against a reinstating upsert (and vice versa), so no store sees an upsert/tombstone pair whose outcome depends on which it applies first.

How Has This Been Tested?

cargo test -p platform-wallet -p platform-wallet-ffi -p platform-wallet-storage — 928 + 310 + 138 pass, plus every integration suite in those crates.

Tests travelling with the change (core_bridge.rs): sweep_without_declared_capability_freezes_the_wallet_despite_a_successful_store pins the gate; sweep_names_the_dead_transactions_and_nothing_else, sweep_reaches_the_persister, merged_sweeps_stay_separate_and_ordered; transactions_swept_removes_the_tracked_asset_lock_it_funded and a_reinstating_reconstruction_folded_after_a_sweep_cancels_its_tombstone; transactions_swept_does_not_drive_payment_hooks pins the handler no-op.

Breaking Changes

None for platform's own API.

Release-timing constraint, not a merge constraint: do not cut a swift-sdk or kotlin-sdk release from a base that contains this PR but not its Swift/Kotlin counterparts. A mobile host at that base freezes its sync watermark on the first sweep it meets — funds-safe, but a user-visible stall. Between merges on v4.2-dev nothing auto-ships.

The pin bump also carries rust-dashcore#981's breaking mnemonic API; the platform-side adaptation is included here and is mechanical.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

Summary by CodeRabbit

• New Features

  • Mnemonic phrases are automatically recognized across supported wordlists without requiring a specified language.
  • Wallets now process transaction-sweep events, including updated balances and restored asset-lock availability.

• Bug Fixes

  • Improved wallet state consistency when transactions are swept, reinstated, or removed.
  • Prevented stale asset locks and sweep records from remaining after related activity.
  • Ensured sweep events do not incorrectly trigger spending or payment-processing actions.

• Tests

  • Added coverage for mnemonic parsing, transaction sweeps, balance updates, asset-lock restoration, and persistence behavior.

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• packages/rs-platform-wallet/src/changeset/core_bridge.rs

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📝 Walkthrough

Walkthrough

The update pins a newer rust-dashcore revision, adopts automatic mnemonic parsing, and adds TransactionsSwept handling across changeset merging, persistence, asset-lock reconstruction, balance updates, spend observation, and payment hooks.

Changes

Wallet update

Layer / File(s)	Summary
Mnemonic API migration Cargo.toml, packages/rs-platform-wallet-ffi/..., packages/rs-platform-wallet/..., packages/rs-sdk-ffi/...	The workspace uses a newer rust-dashcore revision. Mnemonic parsing now uses Mnemonic::from_phrase(phrase). Tests remove explicit Language::English arguments.
Sweep changeset and persistence flow packages/rs-platform-wallet/src/changeset/changeset.rs, packages/rs-platform-wallet/src/changeset/core_bridge.rs	Sweep events create ordered SweepBatch values. Asset-lock merges remove conflicting upserts and tombstones. Persisters without CORE_SWEEP_REMOVAL withhold the watermark and freeze the wallet.
Sweep state and event handling packages/rs-platform-wallet/src/wallet/asset_lock/..., packages/rs-platform-wallet/src/wallet/core/..., packages/rs-platform-wallet/src/wallet/identity/network/payment_handler.rs	Sweeps remove tracked asset locks and update wallet balances. Spend observation and payment hooks ignore sweep events. Tests cover these projections and reinstatement behavior.

Estimated code review effort: 4 (Complex) | ~60 minutes

Merge Risk: ⚪ Minimal · up to 45ea9

This updates wallet sweep persistence, balance handling, asset-lock cleanup, and mnemonic parsing. No concrete current-head merge-blocking risk remains.

Sequence Diagram(s)

sequenceDiagram
  participant WalletEvent
  participant ChangesetAdapter
  participant WalletPersister
  WalletEvent->>ChangesetAdapter: Emit TransactionsSwept
  ChangesetAdapter->>WalletPersister: Store sweep batch and asset-lock removals
  WalletPersister-->>ChangesetAdapter: Return persistence result and capabilities

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✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: platform-wallet now handles swept transactions at the persistence seam.
Docstring Coverage	✅ Passed	Docstring coverage is 81.08% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 111 functions across 24 files.
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.

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[thepastaclaw]

🕓 Queued for automated review — 67th in line, estimated start in ~94 h (commit 45ea9ef)
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[romchornyi]

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[llbartekll]

Approving — the producer logic is sound and well covered. One verification request below that I'd like done before the stack lands; it's not an objection to the code.

Verified while reviewing

Three things in the description I checked rather than took on trust, all of which held up:

The pin bump loses nothing. The SHA-level compare looks alarming — 4db5c367...21aaafed is ahead 22, behind 10, diverged, i.e. ten commits reachable from the old pin are not reachable from the new one, including 4db5c367 itself (#991, the payload-finalization seam this branch's base requires). That's purely an artifact of the curated line having been rebased. Every one of the ten exists on dev under a different SHA:

missing from new pin	same commit on dev
4db5c367 #991 payload-finalization seam	5f2de2e0
33030acf #980 non-English BIP-39 parse paths	b66db390
e8928f8b #947 QRInfo masternode-sync recovery	1a6fb3bf
3acfdb33 #960 / 9a928518 #964 dash-spv tick fixes	54b7f7e5 / e9ef99c5
#963, #970, #965, #967 (seeds, bench)	all present

So "dev carries everything" is accurate. 21aaafed is also a single-parent squash-merge on dev rather than a branch tip that can be rebased away, which makes the pin stable.

The mnemonic adaptation is complete. Swept the workspace for missed call sites. The two remaining Language references are both unaffected: wasm-sdk/src/wallet/key_derivation.rs uses the bip39 crate directly (not key_wallet, note SimplifiedChinese vs ChineseSimplified), and rs-unified-sdk-jni uses FFILanguage on the generation path, where a wordlist is still required. All eight workspace deps and twelve Cargo.lock entries moved consistently; no stale pins.

The partial-reinstatement release is safe. The case I went looking for: a batch removes losers A and B, A's untaken input Y lands in released_outpoints, then A returns chainlocked in the same fold. CoreChangeSet::merge retracts A from txids but deliberately keeps the release set, so on the face of it Y gets freed while a surviving record spends it. #4559 closes this — core_state.rs builds claimed_by_survivors from records no batch sweeps and filters them out of released, then surviving_stored_input_claims re-checks against the unpruned on-disk history, with a_released_coin_a_surviving_record_reclaims_stays_spent pinning it.

Worth stating explicitly somewhere, because the two halves are coupled: the store's veto only works because the merge retracted A from txids first. Had the retraction not happened, A would be in swept_txids, its record would be excluded from the survivor set, and Y would be released. The Swift and Kotlin persisters in PRs 4 and 5 need the same veto — the merge-level retraction alone does not protect them.

The one request: run the Rust checks manually

No Rust CI ran on this PR. tests.yml is gated to master, v*-dev and ci/*, and this targets split/4406-2-storage, so there's been no cargo build, no cargo test, no clippy. (CodeRabbit skipped for the same reason, and the two @coderabbitai review retries hit the rate limit.)

That matters more here than it would on a normal PR: the bump touches 97 files upstream across 22 commits, the whole workspace depends on dashcore transitively, and the Mnemonic::from_phrase signature change is proof that breaking changes ride along. cargo test -p platform-wallet -p platform-wallet-ffi -p platform-wallet-storage covers three crates of roughly thirty — it wouldn't catch a second breaking change landing in rs-drive, rs-dpp, dapi or rs-sdk.

Could you run cargo check --workspace and cargo clippy --workspace on this branch (or dispatch Tests manually — workflow_dispatch is in the triggers) and confirm? If the plan is that full CI catches this on the final PR into v4.2-dev, saying so is enough and this is moot. I'd just rather not discover a compile break at PR 5 of 5 and have to walk it back down the stack.

What's good

• The gate ordering is the load-bearing part and it's right: strip synced_height before store(), fault after. a_coalesced_sweep_and_watermark_never_commits_the_height pins exactly the shape that would otherwise lose data silently, and checking the capability separately from the store() result — rather than trusting an Ok from a host that never saw core.sweeps — is the correct read of the size-negotiated FFI slot.
• Documenting Merge as "associative but NOT commutative" at the fold, with both order-dependent behaviours named, is the kind of thing that stops a future parallelization from quietly corrupting spend decisions. a_later_sweep_that_keeps_a_coin_spent_outlives_an_earlier_release is a real regression test for the union-the-release-sets mistake, not a restatement of the implementation.
• AssetLockChangeSet::merge now holds an actual invariant — never an upsert and a tombstone for the same outpoint — instead of depending on stores applying upserts first. Strictly better contract than the one it replaces.
• The no-op arms explain why nothing happens and where the consequence actually lands, and transactions_swept_does_not_drive_payment_hooks pins the no-op so a later "fix" can't quietly route it back here.

Non-blocking nits

• Stale doc comment, packages/rs-platform-wallet/src/manager/wallet_lifecycle.rs:25-32 — still says callers "must walk the language list themselves" and that key_wallet::Mnemonic "only exposes language-tagged constructors", which is precisely what #981 removed. It now contradicts the inline comment three lines below it.
• Four identical copies of parse_mnemonic_any_language (platform-wallet-ffi/derivation.rs, identity_keys_from_mnemonic.rs, manager/wallet_lifecycle.rs, rs-sdk-ffi/signer_simple.rs) are now one-line wrappers around the same call with the same error string. Post-#981 there's nothing left to share but the &'static str narrowing — good moment to collapse or inline them.
• Vestigial block in commit_wallet — the { … } wrapping the body is a leftover from the loop it was extracted from; dropping it would de-indent the new code by one level.
• DASHPAY_PAYMENTS in transactions_swept_removes_the_tracked_asset_lock_it_funded is declared with a comment about the flip's overlay being "staged for a payment-durable backend", but nothing in this diff writes dashpay_payments_overlay — that's #4442. The bit is harmless; the comment describes behaviour that isn't here yet.
• last_processed_height isn't stripped alongside synced_height in the sweep gate. That matches the existing #4069 guard exactly, so it's consistent — but the justification given ("a height that claims blocks are scanned while the removal never landed") reads as applying to both watermarks. Deliberate?
• core_bridge.rs:715 — "retried against (hopefully, by then) a capable backend" is optimistic in-session, since the persister doesn't change under a running adapter. Recovery is really "next launch after the host ships its persister", which is what the PR description says.

The base branch was changed.

[llbartekll]

Re-approving after the push that dismissed the previous approval. I re-read the delta rather than rubber-stamping it: 1cb7db25, 9afbb890 and 66a7c74b are docs, rustfmt and one lint allow — no behavioural change to the sweep path, so everything verified in the first pass still holds.

The four corrections all landed accurately:

• wallet_lifecycle.rs no longer claims callers "must walk the language list themselves", and folding the inline note into the doc comment removes the contradiction rather than papering over it.
• The core_bridge.rs fault comment now says recovery is not in-session and that freezing is the point, which is what the code actually does.
• The DASHPAY_PAYMENTS fixture states plainly that nothing here writes dashpay_payments_overlay and that the bit is declared for #4442. Matches what I checked.
• last_processed_height — thanks for answering in the code. Separating "durable claim that everything up to here is scanned and persisted" from "the adapter's own progress marker" is the right distinction, and it makes the asymmetry with synced_height self-evident to the next reader.

#[allow(clippy::too_many_arguments)] with the borrow-split reasoning is the right call over a struct that would rename the same eight fields.

Two things before this can merge

It's CONFLICTING. v4.2-dev has moved on to 056d275cc6 (#4604) and this branch doesn't contain it, so it needs a rebase.

Rust CI still hasn't run — but the rebase will fix that. Moving the base from split/4406-2-storage to v4.2-dev was the right call, and it means tests.yml now applies. It hasn't fired yet because a base change raises a pull_request edited event, which isn't in the trigger list, and the last commit push happened while the base was still the split branch, so the branch filter dropped it. gh run list --workflow=tests.yml --branch split/4406-3-producer is empty.

The force-push that resolves the conflict raises synchronize with the base now at v4.2-dev, so it will finally schedule the workspace build. That closes the one request from my previous review on its own — the concern was only ever that a 97-file upstream bump had been validated against three crates of roughly thirty, and full CI answers it properly.

Worth watching that first run rather than assuming it's green, since it's the first machine check this pin bump has had anywhere in the split.

Approving now so this isn't waiting on review, with the caveat that the rebase push will dismiss this too — ping me and I'll re-approve against the CI result.

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Actionable comments posted: 1

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Inline comments:
In `@packages/rs-platform-wallet/src/changeset/core_bridge.rs`:
- Line 741: Update the sweep guard’s fault_and_freeze flow to pass the store
outcome, using record_frozen when store succeeds for an unsupported sweep height
and retaining record_rejected when store returns an error. Preserve the saved
offered_height diagnostic while ensuring successful unsupported sweeps are
reported as frozen rather than rejected.

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📒 Files selected for processing (25)

• Cargo.toml
• packages/rs-platform-wallet-ffi/src/derivation.rs
• packages/rs-platform-wallet-ffi/src/identity_keys_from_mnemonic.rs
• packages/rs-platform-wallet-ffi/src/persistence.rs
• packages/rs-platform-wallet/src/changeset/changeset.rs
• packages/rs-platform-wallet/src/changeset/core_bridge.rs
• packages/rs-platform-wallet/src/manager/accessors.rs
• packages/rs-platform-wallet/src/manager/dashpay_sync.rs
• packages/rs-platform-wallet/src/manager/startup.rs
• packages/rs-platform-wallet/src/manager/wallet_lifecycle.rs
• packages/rs-platform-wallet/src/test_support.rs
• packages/rs-platform-wallet/src/wallet/asset_lock/sync/reconstruction.rs
• packages/rs-platform-wallet/src/wallet/core/balance_handler.rs
• packages/rs-platform-wallet/src/wallet/core/spend_observer.rs
• packages/rs-platform-wallet/src/wallet/identity/network/contact_requests.rs
• packages/rs-platform-wallet/src/wallet/identity/network/discovery.rs
• packages/rs-platform-wallet/src/wallet/identity/network/identity_handle.rs
• packages/rs-platform-wallet/src/wallet/identity/network/invitation.rs
• packages/rs-platform-wallet/src/wallet/identity/network/loading.rs
• packages/rs-platform-wallet/src/wallet/identity/network/payment_handler.rs
• packages/rs-platform-wallet/src/wallet/identity/network/payments.rs
• packages/rs-platform-wallet/src/wallet/identity/network/seed_binding.rs
• packages/rs-platform-wallet/src/wallet/provider_key_at_index.rs
• packages/rs-sdk-ffi/src/mnemonic_resolver_core_signer.rs
• packages/rs-sdk-ffi/src/signer_simple.rs

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.56%. Comparing base (4b3b915) to head (45ea9ef).

Additional details and impacted files

@@             Coverage Diff              @@
##           v4.2-dev    #4560      +/-   ##
============================================
- Coverage     85.70%   85.56%   -0.14%     
============================================
  Files          2764     2764              
  Lines        367624   368208     +584     
============================================
- Hits         315076   315074       -2     
- Misses        52548    53134     +586     

Components	Coverage Δ
dpp	85.97% <ø> (ø)
drive	84.74% <ø> (ø)
drive-abci	88.38% <ø> (-0.29%)	⬇️
sdk	∅ <ø> (∅)
dapi-client	∅ <ø> (∅)
platform-version	∅ <ø> (∅)
platform-value	92.92% <ø> (ø)
platform-wallet	∅ <ø> (∅)
drive-proof-verifier	39.82% <ø> (-1.28%)	⬇️

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[llbartekll]

Re-approving on 45ea9ef5. The verification request from my two previous reviews is now satisfied, so this is the first approval that rests on machine evidence rather than reading.

Rust CI ran and passed on this exact SHA. Run 34208157116 is on head_sha 45ea9ef5, and Rust workspace tests / Tests is green. Two details make that stronger than it looks:

• Rust wallet tests shows SKIPPED, which is correct rather than a gap — it is gated on rs-scope == 'wallet', and because this PR also touches rs-sdk-ffi, Cargo.toml and Cargo.lock, changes classified it full and ran the wider workspace job instead.
• The shielded phase counts a Cargo.lock change as relevant precisely for dep bumps and feature unification, so the pin jump got that coverage too.

That closes it. My concern was only ever that a 97-file upstream bump across 22 commits had been validated against three crates of roughly thirty; a green full-workspace run answers it properly. codecov/patch and codecov/project are green as well. Swift SDK build was still pending when I looked — worth a glance before merge, though nothing here touches Swift.

On the frozen-vs-rejected fix (ec97473a5b): good catch, and I should have caught it myself — I read that gate closely enough to praise the strip-before-store() ordering, but not closely enough to notice the diagnostic on that path was mislabelled. Recording a guard-stripped height as rejected would have pointed operators at the persister when the actual cause is a host that never declared CORE_SWEEP_REMOVAL, which is exactly the kind of wrong signal that costs an afternoon.

The fix is right, and it covers a case beyond what was suggested: a store() error on a round the guard had already stripped stays Frozen, since the store never saw the height. WithheldHeight carrying the reason to a single dispatch point is the correct shape — the classification can't drift out of sync with the branch that caused it. undeclared_sweep_capability_reports_the_watermark_as_frozen_not_rejected pins both fields, so a regression shows up as a failing assertion rather than a misleading log line.

Everything from the earlier passes still stands: the pin bump loses nothing (all ten commits absent by SHA are present on dev under rebased SHAs), the mnemonic adaptation has no missed call sites, and the partial-reinstatement release is safe because the merge-level retraction and #4559's survivor veto compose. The one item that outlives this PR is that the Swift and Kotlin persisters still need the same veto — the retraction alone does not protect them.