I think he have used this
https://github.com/bitpay/copayit is open source software actually by bitpay (copay) themselves to show their code are safe to use and also you can use and modify it to run your own wallet.
This is copay. What I am talking about is a tool that can start with Copay and change the coin for something else than Bitcoin.
Its called doing work.....
Actually fork the code and edit it.
Try it