/// <reference types="node" />
import { SocksProxy } from 'socks';
import { Agent, ClientRequest, RequestOptions } from 'agent-base';
import { AgentOptions } from 'agent-base';
import { Url } from 'url';
import net from 'net';
import tls from 'tls';
interface BaseSocksProxyAgentOptions {
    host?: string | null;
    port?: string | number | null;
    username?: string | null;
    tls?: tls.ConnectionOptions | null;
}
interface SocksProxyAgentOptionsExtra {
    timeout?: number;
}
export interface SocksProxyAgentOptions extends AgentOptions, BaseSocksProxyAgentOptions, Partial<Omit<Url & SocksProxy, keyof BaseSocksProxyAgentOptions>> {
}
export declare class SocksProxyAgent extends Agent {
    private readonly shouldLookup;
    private readonly proxy;
    private readonly tlsConnectionOptions;
    timeout: number | null;
    constructor(input: string | SocksProxyAgentOptions, options?: SocksProxyAgentOptionsExtra);
    /**
     * Initiates a SOCKS connection to the specified SOCKS proxy server,
     * which in turn connects to the specified remote host and port.
     *
     * @api protected
     */
    callback(req: ClientRequest, opts: RequestOptions): Promise<net.Socket>;
}
export {};