/// <reference types="grecaptcha" />
import { InjectionToken } from "@angular/core";
import { RecaptchaSettings } from "./recaptcha-settings";
/** @deprecated Use `LOADER_OPTIONS` instead. See `RecaptchaLoaderOptions.onBeforeLoad` */
export declare const RECAPTCHA_LANGUAGE: InjectionToken<string>;
/** @deprecated Use `LOADER_OPTIONS` instead. See `RecaptchaLoaderOptions.onBeforeLoad` */
export declare const RECAPTCHA_BASE_URL: InjectionToken<string>;
/** @deprecated Use `LOADER_OPTIONS` instead. See `RecaptchaLoaderOptions.onBeforeLoad` */
export declare const RECAPTCHA_NONCE: InjectionToken<string>;
export declare const RECAPTCHA_SETTINGS: InjectionToken<RecaptchaSettings>;
export declare const RECAPTCHA_V3_SITE_KEY: InjectionToken<string>;
/**
 * Specifies the options for loading the reCAPTCHA script tag.
 */
export type RecaptchaLoaderOptions = {
    /**
     * Invoked before the `<script>` tag is appended to the DOM.
     * Use this function as an opportunity to set `nonce`, as well as modify the URL of the tag.
     *
     * Use the `url.searchParams` to set additional query string attributes (including reCAPTCHA language),
     * or use an entirely different base URL altogether.
     *
     * The URL that you provide will then properly set the `"render"` and `"onload"` attributes which are required for proper `ng-recaptcha` wire-up.
     *
     * @param url the current URL that was composed. Either modify it in-place, or return a completely new URL.
     * @returns the final URL that is going to be used as the `src` for the `<script>` tag, along with (optionally) a nonce.
     *
     * @example
     * Provide nonce:
     * ```ts
     * {
     *    provide: RECAPTCHA_LOADER_OPTIONS,
     *    useValue: {
     *      onBeforeLoad(url) {
     *        return {
     *          url,
     *          nonce: "YOUR_NONCE"
     *        };
     *      }
     *    }
     * }
     * ```
     *
     * Set the reCAPTCHA language:
     * ```ts
     * {
     *    provide: RECAPTCHA_LOADER_OPTIONS,
     *    useValue: {
     *      onBeforeLoad(url) {
     *        url.searchParams.set("hl", "en-GB")
     *
     *        return { url };
     *      }
     *    }
     * }
     * ```
     *
     * Use a different base URL for loading reCAPTCHA
     * ```ts
     * {
     *    provide: RECAPTCHA_LOADER_OPTIONS,
     *    useValue: {
     *      onBeforeLoad(_url) {
     *        const chinaCompatibleUrl = new URL("https://www.recaptcha.net/recaptcha/api.js");
     *        // optionally, set the locale:
     *        // chinaCompatibleUrl.searchParams.set("hl", "zh-CN");
     *
     *        return {
     *          url: chinaCompatibleUrl
     *        };
     *      }
     *    }
     * }
     * ```
     */
    onBeforeLoad?(url: URL): {
        url: URL;
        nonce?: string;
    };
    /**
     * Allows you to change the `grecaptcha` that the `ng-recaptcha` will be relying on.
     * This method is useful when you need to use `grecaptcha.enterprise` instead of the base `grecaptcha`
     *
     * @param recaptcha the value of `window.grecaptcha` upon script load.
     * @returns the {ReCaptchaV2.ReCaptcha} instance that the `ng-recaptcha` lib will use.
     *
     * @example
     * Using the Enterprise version of `grecaptcha`:
     *
     * ```ts
     * {
     *    provide: RECAPTCHA_LOADER_OPTIONS,
     *    useValue: {
     *      onBeforeLoad() {
     *        const recaptchaEnterpriseUrl = new URL("https://www.google.com/recaptcha/enterprise.js");
     *        // optionally, if you're using the reCAPTCHA session-tokens, set the `&waf=session` param,
     *        // see https://cloud.google.com/recaptcha-enterprise/docs/implement-waf-ca#session-token
     *        // recaptchaEnterpriseUrl.searchParams.set("waf", "session");
     *
     *        return {
     *          url: recaptchaEnterpriseUrl,
     *        }
     *      },
     *      onLoaded(recaptcha) {
     *        return recaptcha.enterprise;
     *      }
     *    }
     * }
     * ```
     */
    onLoaded?(recaptcha: ReCaptchaV2.ReCaptcha): ReCaptchaV2.ReCaptcha;
};
/**
 * See the documentation for `RecaptchaLoaderOptions`.
 */
export declare const RECAPTCHA_LOADER_OPTIONS: InjectionToken<RecaptchaLoaderOptions>;