How to know that user has rated the app on appstore or not

I have downloaded the irate from this link https://github.com/nicklockwood/iRate and its

running fine in my app. Can I come to know whether user actually rated the app in App Store

or not, or just opened the link? because I want to perform an action if user rate the app.

Thanks in Advance.

Once the user is outside of your app - I don't think there is much you can do to track their actions. Unless you had control over the rating systems, which you don't.