export type OpenExternalBrowser = {
    /**
     * Target URL accessed from the LINE app.
     */
    url: string;
};
export type OpenAndroidChromeCustomTab = OpenExternalBrowser;
/**
 * Add LINE's official query parameter for opening a target URL in an external browser.
 *
 * @param payload Target URL payload.
 * @returns URL with `openExternalBrowser=1`.
 * @example
 * openExternalBrowser({ url: 'https://example.com/' })
 * // => 'https://example.com/?openExternalBrowser=1'
 * @link https://developers.line.biz/en/docs/messaging-api/using-line-url-scheme/#opening-url-in-external-browser
 */
export declare function openExternalBrowser(payload: OpenExternalBrowser): string;
/**
 * Add LINE's official Android-only query parameter for opening a target URL in a Chrome custom tab.
 *
 * @param payload Target URL payload.
 * @returns URL with `openInAppBrowser=0`.
 * @example
 * openAndroidChromeCustomTab({ url: 'https://example.com/' })
 * // => 'https://example.com/?openInAppBrowser=0'
 * @link https://developers.line.biz/en/docs/messaging-api/using-line-url-scheme/#opening-url-in-external-browser
 */
export declare function openAndroidChromeCustomTab(payload: OpenAndroidChromeCustomTab): string;