import type { Middleware } from 'koa';
import { Policy } from './interface/policy.js';
interface Options {
    enableWarn?: boolean;
    policy?: Policy;
}
/**
 * @desc Set Content-Security-Policy
 * @param {Object} param
 * @param {boolean} param.enableWarn enable warn log
 * @param {Object} param.policy csp policy
 * @param {string[]} param.policy.defaultSrc
 * @param {string[]} param.policy.childSrc
 * @param {string[]} param.policy.connectSrc
 * @param {string[]} param.policy.fontSrc
 * @param {string[]} param.policy.frameSrc
 * @param {string[]} param.policy.imgSrc
 * @param {string[]} param.policy.frameAncestors
 * @param {string[]} param.policy.manifestSrc
 * @param {string[]} param.policy.mediaSrc
 * @param {string[]} param.policy.objectSrc
 * @param {string[]} param.policy.prefetchSrc
 * @param {string[]} param.policy.styleSrc
 * @param {string[]} param.policy.webrtcSrc
 * @param {string[]} param.policy.workerSrc
 */
export default function ({ enableWarn, policy }?: Options): Middleware;
export {};