Jetpack::sync_idc_optin PHP Method

    public static function sync_idc_optin()
    {
        if (Jetpack_Constants::is_defined('JETPACK_SYNC_IDC_OPTIN')) {
            $default = Jetpack_Constants::get_constant('JETPACK_SYNC_IDC_OPTIN');
        } else {
            $default = !Jetpack_Constants::is_defined('SUNRISE') && !is_multisite();
        }
        /**
         * Allows sites to optin to IDC mitigation which blocks the site from syncing to WordPress.com when the home
         * URL or site URL do not match what WordPress.com expects. The default value is either false, or the value of
         * JETPACK_SYNC_IDC_OPTIN constant if set.
         *
         * @since 4.3.2
         *
         * @param bool $default Whether the site is opted in to IDC mitigation.
         */
        return (bool) apply_filters('jetpack_sync_idc_optin', $default);
    }

 static function send_data($data, $codec_name, $sent_timestamp, $queue_id)
 {
     Jetpack::load_xml_rpc_client();
     $query_args = array('sync' => '1', 'codec' => $codec_name, 'timestamp' => $sent_timestamp, 'queue' => $queue_id);
     if (Jetpack::sync_idc_optin()) {
         $query_args['home'] = get_home_url();
         // Send home url option to check for Identity Crisis server-side
         $query_args['siteurl'] = get_site_url();
         // Send home url option to check for Identity Crisis server-side
     }
     $url = add_query_arg($query_args, Jetpack::xmlrpc_api_url());
     $rpc = new Jetpack_IXR_Client(array('url' => $url, 'user_id' => JETPACK_MASTER_USER, 'timeout' => 30));
     $result = $rpc->query('jetpack.syncActions', $data);
     if (!$result) {
         return $rpc->get_jetpack_error();
     }
     return $rpc->getResponse();
 }