import type { CollectionReference, Firestore } from "@google-cloud/firestore";
import { type KeyLookup, type LockInfo, type OwnershipLookup } from "../../common/backend.js";
import type { FirestoreCapabilities, FirestoreConfig } from "../types.js";
/**
 * Retrieves lock info by key or lockId (diagnostic only, non-atomic).
 *
 * @remarks
 * Non-atomic queries acceptable for diagnostic lookups (ADR-011). Omits `.limit(1)`
 * to detect duplicate lockIds (ADR-014).
 */
export declare function createLookupOperation(db: Firestore, locksCollection: CollectionReference, config: FirestoreConfig): (opts: KeyLookup | OwnershipLookup) => Promise<LockInfo<FirestoreCapabilities> | null>;