import type { DB } from './types.js';
/** Acquires a transaction-scoped advisory lock. Released automatically at commit/rollback.
 *
 * String keys: hashed independently into the int4 arguments of pg_advisory_xact_lock.
 * Numeric namespace: `advisoryLock(db, 1001, 'key')` → `pg_advisory_xact_lock(1001, hashtext('key'))`.
 */
export declare function advisoryLock(db: DB, namespace: number, key: string): Promise<void>;
export declare function advisoryLock(db: DB, ...keys: string[]): Promise<void>;
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