import type { OperationRecord, OperationStore, OperationStoreFilter, OperationStoreStats } from '../types/operations.js';
/**
 * Queue counting shared by every operation store, kept apart from the stores themselves so a store
 * that uses it — Redis, say — does not also carry the in-memory one.
 */
/** Whether a record is queued and no worker holds a live lease on it. */
export declare function isUnheldQueued(record: OperationRecord<unknown>, now: string): boolean;
/** Whether a record passes a store filter. */
export declare function matchesFilter(record: OperationRecord<unknown>, filter?: OperationStoreFilter): boolean;
/** Counts records by status, the oldest queued one, and lapsed leases. */
export declare function countRecords(records: Iterable<OperationRecord<unknown>>, now: string, filter?: OperationStoreFilter): OperationStoreStats;
/**
 * Counts what an operation store holds: records by status, the oldest queued one, and running
 * records whose lease has lapsed. Uses the store's own `stats()` when it has one, and counts
 * `list()` otherwise. A store with neither reports nothing.
 */
export declare function operationStats(store: Pick<OperationStore<unknown>, 'stats' | 'list'>, options?: OperationStoreFilter & {
    now?: Date;
}): Promise<OperationStoreStats>;