import { DB } from '../lib/db';
export declare class FileStorage extends DB {
    constructor();
    writeFile(data: any): Promise<any>;
    readFile(id: any): Promise<any>;
    deleteFile(id: any): Promise<any>;
    isFileExists(id: any): Promise<boolean>;
    getFileInfo(id: any): Promise<any>;
    private streamFile(id, mimetype);
}