Class InMemoryEstablishedProposalStore

Store an initial snapshot, or atomically replace the exact available generation named by expectedSnapshotFingerprint. Reserved and terminal generations must always win.

Remove only an available snapshot. Reservations and terminal fences win.

Recover the exact durable operation needed to poll and reconcile after a process restart.

Atomically reserve the supplied mutation. Any retained completion tombstone with the same operationKey must return conflict, even when claim or binding evidence differs; an operation-identity collision must never authorize redispatch.

Atomically consume source generations and install seller-returned successor generations.

Atomically terminalize successful declines while restoring authoritative unable sources.

Delete completion tombstones whose store-authored retainUntil is at or before the store's current time. Implementations must never prune earlier than ESTABLISHED_PROPOSAL_COMPLETION_TOMBSTONE_RETENTION_MS after completion. After pruning, findSubmittedTask may return undefined and reserveMutation may return any result justified by the remaining source records (including a fresh reservation when every source was restored). limit is the maximum number of tombstones deleted in one call; ordering is unspecified. Return the number of deletions committed. Durable stores must select eligible rows and delete them atomically using one transaction and one backing-store clock snapshot.

Optional for backward compatibility; durable implementations should implement this or provide an equivalent database-owned sweeper.

Release an exact reserved/retryable claim, or an exact terminal commit-uncertain claim after authoritative seller failure evidence.

Persist one seller task ID and reject scoped reuse by live records or completion tombstones.