import type { ActionFile } from '@balena/jellyfish-plugin-base';
export declare const GRAVATAR_URL = "https://www.gravatar.com/avatar/";
/**
 * Generate Gravatar URL given an email address
 * @function
 *
 * @param email - email address to generate URL from
 * @returns Gravatar URL
 */
export declare function generateURL(email: string): string;
/**
 * Send a HEAD request to check if the avatar exists
 * @function
 *
 * @param url - Gravatar URL to check
 * @returns result denoting existence of avatar
 */
export declare function gravatarExists(url: string): Promise<boolean>;
export declare const actionSetUserAvatar: ActionFile;