import { Exodas } from '..';
import { HelmetOpts } from './accessories/ExoHelmetOpts';
export declare class ExoHelmet {
    private exo;
    constructor(exo: Exodas);
    private $enable;
    private opts;
    enable(opts?: HelmetOpts): this;
    contentSecurityPolicy(opts: HelmetOpts['contentSecurityPolicy']): this;
    crossOriginEmbedderPolicy(opts?: HelmetOpts['crossOriginEmbedderPolicy']): this;
    crossOriginOpenerPolicy(opts: HelmetOpts['crossOriginOpenerPolicy']): this;
    crossOriginResourcePolicy(opts: HelmetOpts['crossOriginResourcePolicy']): this;
    originAgentCluster(opts: HelmetOpts['originAgentCluster']): this;
    referrerPolicy(opts: HelmetOpts['referrerPolicy']): this;
    strictTransportSecurity(opts: HelmetOpts['strictTransportSecurity']): this;
    noSniff(opts: HelmetOpts['noSniff']): this;
    dnsPrefetchControl(opts: HelmetOpts['dnsPrefetchControl']): this;
    permittedCrossDomainPolicies(opts: HelmetOpts['permittedCrossDomainPolicies']): this;
    xssProtection(opts: HelmetOpts['xssProtection']): this;
}