Integrate CPALead OfferWall to existing Android Application

Hi, I have a Rewards app Android Application. The users are required to complete certain offers to earn rewards (points) which they can redeem for real life [login to view URL] app is currently down from Google Play as I want to integrate the offerwall from CPALead to it. I have written the app myself in Android Studio. The code is well commented, the app is well structured and beautiful (I had a designer to the graphics). I am looking for someone who has done this before for his/her app, which is to integrate the offerwall from CPALead into an Android App. Besides the payment, the developer may also keep the app template which he may use to launch his own app or even sell it.