interface UTMParams {
    source?: string;
    medium?: string;
    campaign?: string;
    term?: string;
    content?: string;
    sessionId?: string;
    messageId?: string;
}
export declare const addUtmParams: (url: string | URL, params?: UTMParams) => string;
export declare function parseURL(url: string): {
    isValid: true;
    url: URL;
} | {
    isValid: false;
    error: string;
};
export {};