/// <reference types="node" />
import { Mkey } from '../Mkey';
export declare class CacheKeyStore {
    private threshold_value;
    private enc_key_store;
    private dec_key_store;
    private future_key_ids;
    search_dec_key(mk_index: Buffer): Mkey;
    num_of_keys(k_store_type: any): number;
    get_enc_key_by_version(key_ver: number): Mkey;
    update_key(base64_index: string, m_key: Mkey, k_store_type: any): void;
    remove_all_m_keys(): void;
    remove_keys_via_list(target_list: string[], k_store_type: any): void;
    get_key_id_list(k_store_type: any): string[];
    reset_future_key_ids(): void;
    update_future_key_ids(service: string, max_ver: number): void;
    has_future_key_id(key_id: any): boolean;
}