• A valid card number contains 16 digits
• Currency is received in ISO Currency Code that always consists of 3 capital letters

Upon receiving process payment request, the payment details are validated before stored into payment_details table.
A request to the simulated bank is then made to process the payment, and the result of the transaction is stored into transaction_details table.
The status of the transaction and the transaction ID is provided as part of the response.
Transaction details can then be retrieved using a given transaction ID

End points

• [POST] process payment - api/v1/payment

  Sample request payload

     {
         "cardNumber": "1234567812345678",
         "expiryMonth": 8,
         "expiryDate": 23,
         "cardHolderName": "K Li",
         "amount": 187.33,
         "currency": "GBP",
         "cvv": "777"
     }
  

  Sample Responses: Status Code 201

     {
         "status": "Success",
         "transactionID": 1879946082
     }
  

• [GET] get transaction history - api/v1/transaction/{transactionId}

  Sample Response: Status Code 200

    {
        "cardNumber": "12345******45678",
        "cardHolderName": "K Li",
        "amount": 187.33,
        "currency": "GBP",
        "success": true,
        "createdDate": "2021-01-01T00:00:00"
    }
  

  Status Code 404

  Transaction not found by Id

Used FluentValidation for request validation

Used AutoMapper for model mappings