declare type IProtocol = 'http' | 'https';
declare type IOptions = {
    email: string;
    md5Hash?: string;
    protocol?: IProtocol;
    size: number;
    defaultImage: '404' | 'mp' | 'identicon' | 'monsterid' | 'wavatar' | 'retro' | 'robohash' | 'blank';
};
export declare function Gravatar(options: IOptions): string;
export {};