/*!
 * @copyright FLYACTS GmbH 2018
 */
import { Action } from '@flyacts/routing-controllers';
import { CorsOptions } from 'cors';
import { Application } from 'express';
import { Connection, ConnectionOptions } from 'typeorm';
import { VersionInformation } from './interfaces/version-information.interface';
import { Logger } from './providers/logger.provider';
/**
 * A generic initializer of our backend
 */
export declare class Backend {
    connection: Connection;
    express: Application;
    logger: Logger;
    private controllers;
    private versionInformation;
    private constructor();
    /**
     * Launch the listen port and optional explorer
     */
    start(): Promise<void>;
    /**
     * Create a new backend instance and configure it
     */
    static create(typeOrmConfig: ConnectionOptions | Connection, controllers: Function[], middlewares: Function[], versionInformation: VersionInformation, authorizationChecker?: (action: Action, roles: string[]) => Promise<boolean>, currentUserChecker?: (action: Action) => Promise<unknown>, development?: boolean, cors?: boolean | CorsOptions, validation?: boolean, defaultErrorHandler?: boolean): Promise<Backend>;
}