import { Proxy } from './types/proxy';
import { Metadata } from './types/metadata';
export declare class ProxyBuilder implements Proxy {
    private key;
    private dynamicKey;
    private tunnelKey;
    private randomToken;
    private currentInstance;
    private proxyList;
    private proxyDynamic;
    private lastKey;
    constructor();
    withKey(key: string): Proxy;
    withDynamicKey(key: string): Proxy;
    withTunnelKey(key: string): Proxy;
    withRandomToken(): Proxy;
    withProxyList(list?: string): Proxy;
    withProxyDynamic(url?: string): Proxy;
    withRandomInstance(): Proxy;
    getRandomToken(): string;
    getDynamicInstance(): Promise<string>;
    getInstance(): Promise<string>;
    getTunnel(): boolean | undefined;
    getProxyList(): string[];
    getLastKey(): string;
    getMetadata(url?: string): Promise<Metadata>;
}