Payment Gateway

This application provides the basic functionality of a payment gateway through API calls that a merchant can utilise to process payments with banks.

Notable features include:

• .NET Core 2.2 Web API
• EF Core's InMemory Provider for storage
• Swagger to test APIs
• Bank simulator app
• Health Check
• Lazy Caching

Assumptions/Comments

• For the purposes of this challenge, a simple inmemory storage solution is used with EF Core instead of a full Microsoft SQL Server database, but on a production solution the latter would be the appropriate choice
• The bank simulator only provides a meaningful response to the gateway and does not include any business logic within the app to validate the request data
• Ideally, the credit card information should be encrypted and there should be proper authentication
• Masking of card number can also be done at database level using dynamic data masking.
• Versioning could have been implemented in production

IMPORTANT NOTICE

• When performing a POST request,the Payment ID was also return for testing purpose when using the GET Request

Requirements

• .NET Core 2.2

Usage

Clone the repository to your local computer

Restore all packages by using the package manager console. Type the below cmd

-dotnet restore

Configure the solution to start multiple project in visual studio:

• PaymentGateWay
• PaymentGateWay.BankSimulator

Launch

• Go to "https://localhost:44382/swagger/index.html" to open the Swagger UI, or use Postman to test APIs
• Two API calls available:
  • Create a new payment
  • View a previous payment

Create New Payment

POST api/paymentdetail

JSON body: { "cvv": 1114, "cardnumber": 1234544491234567, "currency": "EUR", "expiryMonth": "2008-12-25T00:00:00" }

View Previous Payment

GET api/paymentdetail/{id}

e.g https://localhost:44382/api/paymentdetail/d3091fa1-5d06-44ef-a11e-e4316a57d0cc

HealthCheck

• Go to "https://localhost:44382/health" to have status of database health