How to redirect from external page to Prestashop custom module php mage

[jafferpg]

Hi,

I have created custom payment module and when payment is completed it will redirect to custom return path(PHP)file which is created inside the custom module in prestshop

But the problem is:

1. It should redirect to custom php file with extends ModuleFrontController. How to achieve this using namespace or any other options

2. How to get orderId and TotalAmount to external file

 

I am new to prestashop. Appreciate for your support please. Thanks in advance