BoxBilling new event hook

Service.php

    public static function onAfterAdminOrderActivate(Box_Event $event)
    {
        $api = $event->getApiAdmin();
        $params = $event->getParameters();
        $order_id = $params['id'];
        $order = $api->order_get(array('id'=>$order_id));
        $service = $api->order_service(array('id'=>$order_id));
        $product = $api->product_get(array('id'=>$order['product_id']));

        // do your stuff here
    }