See my referencing blog post for this coding challenge assignment here.

REST Web Service

Tools: NetBeans (IDE), Postman (API Testing)

Frameworks / Libraries:

• Spark (Web Framework)
• Guice (Dependency Injection)
• Gson (JSON)
• JUnit (Testing)
• Nimbus JWT (Authentication)
• JBCrypt (Hashing)

Endpoints:

• api/v1/public/authenticate - accepts and verifies credentials then returns a user profile as well as a JSON Web Token to authenticate future requests.
• api/v1/authenticated/payment - accepts a payment amount, subtracts the payment amount from the user's account, updates the user profile and returns a breakdown of any change to be dispensed.

Assumptions:

• If an amount owed as change is less than the lowest denomination (2 cents), ignore that remainder.