import { Request, Response } from '../index';
import { Middleware } from '../Middleware';
/**
 * Sets essential HTTP security headers to protect the application.
 */
export declare class SecurityHeaders implements Middleware {
    /**
     * Handle the incoming request.
     */
    handle(request: Request, next: (request: Request) => Promise<Response> | Response, response?: Response): Promise<Response>;
    /**
     * Format a CSP object into a standard header string.
     */
    private formatCsp;
}
//# sourceMappingURL=SecurityHeaders.d.ts.map