import { NgZone } from '@angular/core';
export declare class ReCaptchaV3Service {
    protected zone: NgZone;
    protected lang: any;
    protected readonly windowGrecaptcha = "grecaptcha";
    protected readonly windowOnLoadCallbackProperty = "ngx_captcha_onload_callback";
    protected readonly globalDomain: string;
    protected readonly defaultDomain: string;
    constructor(zone: NgZone, lang: any);
    registerCaptchaScript(useGlobalDomain: boolean, render: string, onLoad: (grecaptcha: any) => void, language?: string): void;
    cleanup(): void;
    private grecaptchaScriptLoaded;
    private getLanguageParam;
    private getCaptchaScriptUrl;
    executeAsPromise(siteKey: string, action: string, config?: {
        useGlobalDomain: boolean;
    }): Promise<string>;
    execute(siteKey: string, action: string, callback: (token: string) => void, config?: {
        useGlobalDomain: boolean;
    }): void;
}