import { CSPHeaderParams } from 'csp-header';
import type { RequestHandler, Request, Response } from 'express';
export * from './constants';
type ReportUriFunction = (req: Request, res: Response) => string;
type ReportToFunction = (req: Request, res: Response) => ReportTo[];
export interface ReportingEndpoint {
    name: string;
    uri: string;
}
export interface ReportTo {
    group: string;
    max_age: number;
    endpoints: {
        url: string;
    }[];
    include_subdomains?: boolean;
}
export interface ParseOptions {
    customTlds?: string[] | RegExp;
}
export interface ExpressCSPParams extends Omit<CSPHeaderParams, 'reportUri'> {
    domainOptions?: ParseOptions;
    reportOnly?: boolean;
    reportTo?: ReportTo[] | ReportToFunction;
    reportUri?: string | ReportUriFunction;
    reportingEndpoints?: ReportingEndpoint[] | ((req: Request, res: Response) => ReportingEndpoint[]);
    processCspString?: (cspString: string, req: Request, res: Response) => string;
}
export declare function expressCspHeader(params?: ExpressCSPParams): RequestHandler;