/// <reference types="node" />
import { Agent } from 'https';
import { RecaptchaV2Result, RecaptchaV3Result } from './recaptcha-result';
import { ClientOptions } from './client';
export declare type SupportedProtocols = 'https' | 'http';
export declare type RecaptchaOptions = {
    httpAgent?: Agent;
    /** The hostname that the client connects to. */
    hostname?: string;
    port?: number | string;
    protocol?: SupportedProtocols;
    /** Milliseconds before a request times out. */
    timeout?: number;
};
declare abstract class Recaptcha implements RecaptchaOptions {
    private _protocol;
    httpAgent?: Agent;
    hostname?: string;
    port?: number | string;
    timeout?: number;
    secretKey: string;
    /**
     *
     * @param {string} secretKey - The secret key used for communication between
     * your site and reCAPTCHA.
     */
    constructor(secretKey: string, options?: RecaptchaOptions);
    set protocol(value: SupportedProtocols);
    get protocol(): SupportedProtocols;
    _getData(responseToken: string, remoteIP?: string): string;
    _getClientOptions(responseToken: string, remoteIP?: string): ClientOptions;
    _request(responseToken: string, remoteIP?: string): Promise<any>;
}
export declare class RecaptchaV2 extends Recaptcha {
    /**
     * Verify the reCAPTCHA v2 response token received from the client.
     * @param {string} responseToken - The user response token provided by the
     * reCAPTCHA client-side integration on your site.
     * @param {string} [remoteIP] - The user's IP address.
     */
    verify(responseToken: string, remoteIP?: string): Promise<RecaptchaV2Result>;
}
export declare class RecaptchaV3 extends Recaptcha {
    /**
     * Verify the reCAPTCHA v3 response token received from the client.
     * @param {string} responseToken - The user response token provided by the
     * reCAPTCHA client-side integration on your site.
     * @param {string} [remoteIP] - The user's IP address.
     */
    verify(responseToken: string, remoteIP?: string): Promise<RecaptchaV3Result>;
}
export {};