import { Proxy } from "../types";
import Peer from "../stream/peer";
export declare function check(proxy: Proxy, url?: string): Promise<boolean>;
export declare function checkSocks5(proxy: Proxy, url?: string, peer?: Peer): Promise<boolean>;
export declare function checkImage(url: string | undefined, image: {
    host: string;
    port: number;
}): Promise<boolean>;
export declare function checkHttp(proxy: Proxy, url?: string, peer?: Peer): Promise<boolean>;
export declare function checkForwardHttp(proxy: Proxy, url?: string): Promise<boolean>;
export declare function checkLight(proxy: Proxy, url?: string, peer?: Peer): Promise<boolean>;
export declare function checkWS(proxy: Proxy, url?: string): Promise<boolean>;
export declare function checkAigo(proxy: Proxy, url?: string, peer?: Peer): Promise<boolean>;
export declare function checks52Aigo(proxy: Proxy & {
    middle: {
        host: string;
        port: number;
        username?: string;
        password?: string;
    };
}, url?: string, peer?: Peer): Promise<boolean>;
export declare function buildHttpRequest(url: string): string;