How to implement licensing feature in web app using laravel 5.1+

I am working on laravel 5.1+ project which is divide in two part one is a centralized database management and another part will be for clients to manage their services. Centralized database application have the feature to manage client application. The centralized database application will have a list of clients with services offered and the validity of the services.

To manage the above process there should be licensing process and each client has to purchase the license and license must have the validity. There should be a manual and automatic validation of license.

If license expire then client can use only the basic feature of the application not more than that and if license will expire will a define period then a message should popup on client application.

Please friends, help me to implement this feature, is there any plugin available. If yes where to start or example to start on. If i need to do from scratch then let me know the flow.

via Chebli Mohamed