import { AppFileSystemService, KeystoreProvider } from "@wocker/core";
import { FileKeystore } from "../types/FileKeystore";
export declare class FileKeystoreProvider extends KeystoreProvider {
    protected readonly fs: AppFileSystemService;
    protected password?: string;
    protected encryptionKey?: Buffer;
    protected _keystore?: FileKeystore;
    constructor(fs: AppFileSystemService);
    protected get keystore(): FileKeystore;
    protected get passwordHash(): string | undefined;
    protected getEncryptionKey(): Promise<Buffer>;
    get(key: string, defaultValue?: string): Promise<string | undefined>;
    set(key: string, value: string): Promise<void>;
    delete(key: string): Promise<void>;
}