/**
 * Set storage: redis_sets. Empty set removes the key (Section 8.6).
 */
import type Database from './driver.ts';
import type { KeysStorage } from './keys.ts';
export declare function createSetsStorage(db: Database, keys: KeysStorage): {
    add(key: Buffer, members: Buffer[], options?: {
        updatedAt?: number;
    }): number;
    remove(key: Buffer, members: Buffer[]): number;
    members(key: Buffer): Buffer[];
    has(key: Buffer, member: Buffer): boolean;
    count(key: Buffer): number;
    /** Copy all members from oldKey to newKey. Caller ensures newKey exists in redis_keys. */
    copyKey(oldKey: Buffer, newKey: Buffer): void;
    /** Get random members without removing. count null/1 = single; count > 0 = up to count distinct; count < 0 = |count| with replacement. */
    getRandomMembers(key: Buffer, count: number | null | undefined): Buffer | Buffer[] | null;
    /** Remove and return random members. Returns single member or array. */
    popRandom(key: Buffer, count: number | null | undefined, options?: {
        updatedAt?: number;
    }): Buffer | Buffer[] | null;
};
export type SetsStorage = ReturnType<typeof createSetsStorage>;