export type OpenTheme = {
    /**
     * Theme product ID.
     */
    productId: string;
};
/**
 * Open a Theme info screen.
 *
 * @param payload Theme product ID payload.
 * @returns LINE Theme info URL.
 * @example
 * openTheme({ productId: '0bac8fed-4c75-40c5-9982-e9ecc3b9d191' })
 * // => 'https://line.me/R/shop/theme/detail?id=0bac8fed-4c75-40c5-9982-e9ecc3b9d191'
 * @link https://developers.line.biz/en/docs/messaging-api/using-line-url-scheme/#opening-the-theme-shop
 */
export declare function openTheme(payload: OpenTheme): string;