Python exercise stripe payment custom gateway
Coding exercise:
Write a Flask/Django App with only 1 method called “ProcessPayment” that receives a request like this
CreditCardNumber (mandatory, string, it should be a valid credit card number)
CardHolder: (mandatory, string)
ExpirationDate (mandatory, DateTime, it cannot be in the past)
SecurityCode (optional, string, 3 digits)
Amount (mandatoy decimal, positive amount)
The response of this method should be 1 of the followings based on
Payment is processed: 200 OK
The request is invalid: 400 bad request
Any error: 500 internal server error
The payment could be processed using different payment providers (external services) called:
PremiumPaymentGateway,
ExpensivePaymentGatewa or
CheapPaymentGateway.
The payment gateway that should be used to process each payment follows the next set of business rules:
a) If the amount to be paid is less than £20, use CheapPaymentGateway.
b) If the amount to be paid is £21-500, use ExpensivePaymentGateway if available. Otherwise, retry
only once with CheapPaymentGateway.
c) If the amount is bigger than £500, try only PremiumPaymentGateway and retry up to 3 times in case
payment does not get processed.
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