Welcome to EasyPay app!

This was my final year sponsored engineering project. It is a UPI Payments app simulator. Similar to Google Pay and PhonePe.
It comprises of a module called CL(Common Library) which is provided by NPCI.
NPCI is National Payments Corporation of India. It handles the payments in India.
UPI is Unified Payments Interface. Using this technology, you can pay by simply scanning QR codes of the payee and entering a password.

Backend Code:

• PSP Server
• NPCI Server

Jetpack Compose

MVVM - Model View ViewModel

Multi Module Architecture

UI

HomeScreen:

Transaction Screens:

CheckBalance Screens and Self QR Code Screen:

Features:

1. Pay a person by scanning a QR code.
2. Pay a person by upiId or phone no. NOT DONE YET. Felt redundant.
3. Check account Balance
4. Register CL to NPCI
5. Fetch NPCI public Keys.

To make this App work, Setup the backend:

1. Setup the PSP/Bank Server.
2. Setup the NPCI Server.
3. Setup the mySQL databases.

After installing the app:

1. First set the PSP ip address from the home screen. This is ip address of the machine which is running the PSP server.
2. Fetch the public keys of NPCI by clicking on the Fetch keys option on home screen.
3. Can other features successfully now.

Tech Used for App:

• Jetpack Compose for UI
• Navigation library for navigation.
• Dagger Hilt for Dependency Injection.
• Retrofit for network Calls.