import type { IChallengeProvider } from './interfaces.js';
export interface ISmartChallengeServerOptions {
    provider: IChallengeProvider;
    host?: string;
    port?: number;
    maxBodyBytes?: number;
    shutdownTimeoutMs?: number;
}
export declare class SmartChallengeServer {
    private server?;
    private startPromise?;
    private endpointUrl?;
    private readonly host;
    private readonly port;
    private readonly maxBodyBytes;
    private readonly shutdownTimeoutMs;
    private readonly provider;
    private readonly activeSockets;
    constructor(optionsArg: ISmartChallengeServerOptions);
    get url(): string;
    start(): Promise<void>;
    private startInternal;
    stop(): Promise<void>;
    private handleRequest;
    private readJson;
    private writeJson;
}