/**
 * Build return URLs for Stripe checkout redirect.
 *
 * Constructs success and cancel URLs that preserve existing query params
 * and include the block anchor hash for post-redirect scroll targeting.
 *
 * @param paramName - Query parameter name to add (e.g., 'enrollment', 'registration')
 * @param anchorId - Block anchor ID for hash fragment (e.g., 'course-registration')
 * @returns Object with success and cancel URLs
 */
export declare function buildCheckoutReturnUrls(paramName: string, anchorId: string): {
    successUrl: string;
    cancelUrl: string;
};
