/**
 * The bounded maintenance pass for the application delivery outbox (WFT-85):
 * recovering lapsed leases and retiring terminal receipts past retention.
 *
 * Nothing here runs on a hidden timer under `backgroundTasks: 'manual'`. A
 * pass walks the delivery keyspace in pages of `maintenanceBatchSize`, up to
 * {@link OUTBOX_MAINTENANCE_MAX_PAGES} pages per call, carrying its cursor to
 * the next call when the cap cuts it short.
 *
 * Unlike the mailbox, the outbox has no `accepted → available` release step:
 * the due index is time-keyed, so a delivery becomes claimable by the clock
 * alone, without a maintenance write.
 *
 * @module core/outbox-maintenance
 */
import type { OutboxMaintenanceReport } from './outbox-contract.ts';
import { type OutboxRuntime } from './outbox-internals.ts';
/** The time-keyed indexes encode `…:<16-digit instant>:<encoded deliveryId>`. */
export declare function parseSortableInstant(key: string, prefix: string): number | null;
/**
 * Run one bounded maintenance pass: recover lapsed leases and retire terminal
 * receipts past retention.
 *
 * A corrupt record halts the pass with `PersistedDataCorruptError`: an outbox
 * whose durable state is untrustworthy must not keep recovering and parking
 * deliveries around the damage.
 */
export declare function runOutboxMaintenance(runtime: OutboxRuntime, now: number, stop?: AbortSignal): Promise<OutboxMaintenanceReport>;