/// <reference types="node" />
import { JosCore } from '../JosCore';
import { Constants } from './common/Constants';
export declare class TdeClient {
    isReady: boolean;
    private sdk_ver;
    private cache_ks;
    private available_key_list;
    private key_chain_is_ready;
    private major_key_ver;
    private corrupt_key_list;
    private josCore;
    private access_token;
    private token;
    constructor(josCore: JosCore, access_token: string);
    init_client(): Promise<void>;
    request_voucher_token(): Promise<void>;
    decrypt_string(base64Str: string): string | null;
    private __check_key_status_for_decryption;
    fetch_master_keys(): Promise<void>;
    private __import_mkeys;
    get_cipher_result(ct: Buffer): {
        keyid: Buffer | null;
        status: Constants.KeyIdStatus;
        strong: boolean;
    };
    static is_encrypted_data(str: string): boolean;
    private static __extract_key_id;
}