export declare type SetValueType = string | number;
export interface CacheAdapter<V> {
    client: V;
    timeout: number;
    get<T>(key: string): Promise<T>;
    set<T>(key: string, data: T, ttl?: number | false): Promise<void>;
    delete(key: string): Promise<void>;
    handleError(err: Error): null;
    getSetMembers(key: string): Promise<string[] | null>;
    addToSet<T extends SetValueType>(key: string, value: T | T[]): Promise<void>;
    removeFromSet<T extends SetValueType>(key: string, value: T | T[]): Promise<void>;
    isSetMember<T extends SetValueType>(key: string, value: T): Promise<boolean>;
    expire(key: string, ttl: number): Promise<void>;
}