PaymentGateway is a REST API that processes payment requests from merchants and provides a way to get payment details by reference.
- .NET 5.0
- IDE supporting C# 9.0
PaymentGatewayAPI can be started locally or as a Docker container. After cloning repository it can be started locally by building solution and starting PaymentGateway.API project.
To run as a Docker container please follow steps below:
- Build the container by running the following command:
docker build -f Dockerfile -t "payment-gateway-api" .
- Start the container using the following command:
docker run -dp 5000:80 payment-gateway-api
SwaggerUI is exposed on /swagger. Postman collection can be downloaded from here.
PaymentGatewayAPI also exposes Prometheus metrics on port 8080.
At the moment PaymentGatewayAPI uses mock bank service. It simulates responses from the bank as follows:
- If card number starts with "5" (i.e. MasterCard) - return
Failure - In all other cases return
Success
The following valid card number can be used for testing purposes: 4689387567825.
- Add authentication support. Once authentication is implemented - update domain logic to ensure that merchants can only get details of the payment they created
- Add support for data encryption and replace mock in-memory repository
- Replace manual mapper with more efficient dynamic mapper (e.g. Mapster)
- Add validation into MediatR pipeline
- Improve card number masking logic
- Improve exception handling at the API level
- Refactor CardNumber and CardCvv classes to make them more efficient
- Review Luhn check NuGet package and implement more efficient algorithm if required
- Add CancellationToken support
- Refactor API client unit tests to make them more readable