import type { Response } from 'express';
import type { CspDirectives } from '../types/CspDirectives';
export interface UpdateCspOptions {
    /** Content-Security-Policy directives to merge into response’s header */
    directives?: CspDirectives;
    /** Base URL of MFE components service for fallback Content-Security-Policy directives */
    feComponentsUrl: string;
    /** The express response whose Content-Security-Policy header should be updated */
    res: Response;
}
/**
 * Update Content-Security-Policy header in response to allow use of MFE components on another domain/origin
 * with given directives, falling back to predefined directives known to be required
 */
export default function updateCsp(options: UpdateCspOptions): void;
/**
 * Update Content-Security-Policy header in response to allow use of MFE components on another domain/origin
 * using predefined directives known to be required
 * @deprecated provide options to `updateCsp` as a single object
 */
export default function updateCsp(feComponentsUrl: string, res: Response): void;