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Restore spent guards without inventing transaction history or observation heights. Preserve unknown and unrelated claimants during conflict and abandonment release, and propagate legitimate releases across accounts. Co-authored-by: Codex <noreply@openai.com>
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drafts: true📝 WalkthroughWalkthrough
ChangesRestored spent-outpoint claims
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Caller
participant ManagedWalletInfo
participant ManagedCoreFundsAccount
Caller->>ManagedWalletInfo: restore_spent_outpoints(outpoints)
ManagedWalletInfo->>ManagedCoreFundsAccount: Forward claims to each funding account
Caller->>ManagedWalletInfo: Abandon transactions or sweep conflicts
ManagedWalletInfo->>ManagedWalletInfo: Collect removed inputs and exclude surviving-record claims
ManagedWalletInfo->>ManagedCoreFundsAccount: Release spent marks with removed transaction IDs
Suggested reviewers: Merge Risk: 🟡 Moderate · up to Abandoning or repeatedly restoring transactions can clear a spent-output guard. The wallet could then re-credit funds that were already spent, which would show an inflated balance. Fix both release paths before merging. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 76.47% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 17 functions across 4 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## dev #1112 +/- ##
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- Coverage 77.86% 77.82% -0.05%
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Files 320 320
Lines 82400 82526 +126
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+ Hits 64163 64226 +63
- Misses 18237 18300 +63
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5 of 7 tasks
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How the iOS wallet relates to this API, and what follows itShort version: iOS and SQLite both already hold the knowledge of which outputs are spent. What neither can do is hand it back to the wallet at load. This PR adds that return path; the follow-up #1113 widens it so the wallet itself reports spend claims and hosts stop deriving them. Based on reading How iOS persistence is built
Where the host's spend knowledge comes fromIt is not independent knowledge. The host derives it from what the wallet reports:
SQLite holds the same thing in a different shape: What that leaves brokenAll host-side mechanisms keep the store correct, not the wallet's memory after load. If funding is redelivered after a restart, the wallet credits the coin, the host writes the row as spent anyway, and the two disagree until the next launch. (Inferred from the code, not observed.)
An earlier version of this comment said the first two "would no longer be needed for the spend guard itself". That was too generous: none of the four can be removed on the strength of this PR alone. Direction
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Actionable comments posted: 2
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Review comments at
@key-wallet/src/managed_account/managed_core_funds_account.rs:
- Line 202: Update the repeated-restoration merge around restored_spent_claims
so a known claim cannot overwrite an existing unknown claim for the same
outpoint; preserve the unknown guard, or reject conflicting claims explicitly.
Review comments at @key-wallet/src/wallet/managed_wallet_info/helpers.rs:
- Line 350: Compute wallet-wide inputs claimed by surviving records before
calling apply_abandon, then pass that protection into each account’s release
decision so an abandoned record cannot clear a spent mark still claimed by a
surviving record in another account.
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CHANGELOG.mdkey-wallet/src/managed_account/managed_core_funds_account.rskey-wallet/src/tests/spent_outpoints_tests.rskey-wallet/src/wallet/managed_wallet_info/helpers.rskey-wallet/src/wallet/managed_wallet_info/mod.rs
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8 of 21 tasks
Restored claims now guard on their own instead of being copied into `spent_outpoints`, so settling a claim can never drop a mark an account derived from its own records. - `release_spent_marks` is back to its account-local role: it runs only in an account that removed a record, on that record's inputs. The wallet-level loops that ran it on every funding account dropped the mark a ChainLocked, txid-only spend leaves behind in an account that never recorded the removed transaction, and let the coin be credited again. - `sweep_conflicts` and `abandon_transaction_with_spends` settle the claims of removed claimants wallet-wide: an outpoint the final winner spends becomes a permanent guard, one a live record still spends stays marked, any other is released. This also works when the claimant has no in-memory record. - `released_outpoints` lists an outpoint only once no funding account guards it, and never an output of a swept transaction. - Restoring an outpoint twice merges the claimants: any disagreement leaves the permanent `None` guard. - `restore_spent_outpoints` returns, and logs at warn, the restored outpoints still held as UTXOs; its docs state when to call it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
When a claimant is removed while another live record still spends the claimed outpoint, the claim now names that record instead of being dropped with a bare mark left behind. A mark inserted into accounts that never recorded the survivor had no owner: nothing released it once the survivor was removed too, so the coin stayed hidden until reload and was never reported as released. Removing the survivor settles the claim again, which releases the outpoint in every funding account and reports it once. The claim pass no longer writes to `spent_outpoints` at all, so that set holds only record-derived marks. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…ands A confirmed or InstantSend-locked transaction spending a restored outpoint now turns the claim on it into the permanent `None` guard in every funding account, whoever the claimant is and whether or not the wallet holds a record of it. Before, only a swept claimant got this treatment. A claimant with no in-memory record cannot be swept, so its claim kept naming it, and a later abandon of that transaction released an outpoint the final transaction had spent. The check runs per final transaction and costs one claim lookup per input and funding account. It replaces the winner-input branch of the claim release pass. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…ord spends it An account releases a spent mark from its own records alone. When a conflict sweep or an abandon removed a record there, and a live record held only by another account spent the same outpoint, the first account dropped its mark. The wallet withheld the outpoint from `released_outpoints`, but nothing guarded it in the account that owns it, so the coin was credited when its funding transaction arrived. Every funding account not guarding such an outpoint now takes a claim naming the surviving spender. The claim follows the existing rules: it is released when that spender is removed too, passes on to another live spender, and becomes permanent once a final transaction spends the outpoint. `apply_abandon` now returns the marks it released, so the abandon path can run the same check the sweep already made for reporting. Not changed: a spend recorded only in another account, with no record ever removed from the funding account, still leaves the funding account without a guard. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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TL;DR: Let wallets that save to a database tell the wallet which coins were already spent when they load it, so spent funds cannot show up as available after a restart.
User story
As a wallet integrator, I want to hand the wallet the list of outputs my storage knows are spent when I load it, so spent funds cannot reappear.
Scenario
A conflicting transaction wins before the wallet discovers its funding. The database retains the spent input, but has no full transaction record for the winner. After a restart the funding is delivered again.
Actual behavior
The reloaded wallet has forgotten the spend and credits the output as available.
Expected behavior
The storage layer returns the spent outputs it holds, and the wallet keeps them spent.
Detailed discussion
Adds
ManagedWalletInfo::restore_spent_outpoints(&[(OutPoint, Option<Txid>)]) -> Vec<OutPoint>for persistence adapters such as Platform #5150. Call it once the funding accounts exist and before any transaction funding a restored outpoint is delivered; it returns (and logs atwarn) the restored outpoints the wallet already holds as UTXOs, which stay credited — an empty result means every guard is effective.Restored claims are kept in their own per-account map, apart from the marks an account derives from its own records, so settling a claim never drops a record-derived mark. The optional transaction ID identifies the claimant:
sweep_conflicts,abandon_transaction) releases the claim, also when the wallet holds no record of that transaction.None) or unrelated claims remain held. Restoring an outpoint again merges the claimants: the same one changes nothing, any disagreement leaves the permanent guard.The same guard covers an outpoint that has no restored claim. When
sweep_conflictsorabandon_transactionremoves a record and a live record held only by another account still spends one of its inputs, every funding account not guarding that outpoint takes a claim naming the surviving spender. Before, the account owning the coin dropped its guard and credited the coin when its funding arrived (same ondev).Guards apply across funding accounts and survive finality. They are skipped by serialization and must be reapplied on load and after adding a funding account, preserving the existing snapshot layout.
Limitation: a claim that changes after restore — made permanent by a final spend, passed to a surviving spender, or taken over from a removed record — changes in memory only and is not reported to the host. A host that restores its stored
(outpoint, claimant)row after a restart gets the pre-change claim back, so these two rules hold for the session, not across a reload. Reporting claim changes so a host can persist them is what #1113 adds. Also unchanged fromdev: a spend recorded only in another account, with no record ever removed from the funding account, leaves the funding account without a guard.Behaviour change to an existing API:
sweep_conflictsnow lists an outpoint inreleased_outpointsonly once no funding account guards it — by a restored claim or by a mark from its own records, including the mark a ChainLocked spend leaves in an account that never recorded the loser.Why: both downstream stores (Platform SQLite and the iOS SwiftData store) already hold this knowledge, derived from what the wallet emits; neither can return it to the wallet at load. See the analysis comment. The
keep-finalized-transactionsfeature does not cover this: it retains records in memory and cannot help for spends that never had a record.Follow-up (#1113, stacked on this PR): have the wallet report every change to the spent set as an explicit delta (claim added with its claimant, claim released) so hosts stop walking transaction inputs, make
restore_spent_outpointsaccept exactly what is reported, and collapse the two internal structures into one where the snapshot layout allows.abandon_transactionhas no channel for released outpoints here; #1113 adds one.Out of scope: inserting transaction records at load, a first-class remove-transaction API, FFI changes, and the Platform-side loader (tracked separately for platform#5150).
Prior work
#1082 supplies late-input accounting and reports swept transactions and released outpoints. #1028 discussed complete-wallet snapshots as a persistence alternative.
Testing
Scoped to
key-wallet:cargo test -p key-wallet --lib: 694 passed, 18 ignored.--features keep-finalized-transactions: 688 passed, 18 ignored.cargo clippy -p key-wallet -p key-wallet-manager -p key-wallet-ffi --all-features --all-targets -- -D warningsandcargo doc -p key-wallet --all-features --no-depswith-D warnings: clean.spent_outpoints_tests.rscover: finality without transaction records; conflict and abandonment with known, unknown, unrelated and surviving claimants across accounts; release of a claimant that has no record; a ChainLocked spend's mark surviving a removal recorded in another account (both paths); a claim passing to a surviving spender; a final spend making a claim permanent; a coin staying guarded after a removal while another account's record still spends it (both paths); claimant merging on repeated restore; the UTXO-overlap return value;released_outpointswithheld while another account still guards; unchanged snapshot serialization.No live-network or full-workspace tests were run.
🤖 Co-authored by Claudius the Magnificent AI Agent