Line of Credit

It should have

• Have a built in APR and credit limit
• Be able to draw money and make payments
  • You can do this by making negative-value transactions, eg -300 is a payment of 300
• Keep track of principal balance over real number of days
• APR Calculation based on outstanding principal balance over real number of days
• Interest is not compounded
• Keep track of transactions
• 30 day payment periods based on principal over actual number of days outstanding during the period
  • This is actually based off the beginning/end of a month, so January has 31 days for example

The calculated amounts will be slightly off due to the difference in the number of days (31 vs 30 this month)

How to use it

1. Visit http://avant.eriksingleton.com
2. Type in any email to log in/create an account
3. Create a New Credit Line with the parameters you want
4. Click on the newly created Credit Line
5. Create New Transactions until you're satisfied

• You'll be restricted to just this month via front end
• There is no restriction via back end right now

6. Click Calculate Interest to create a new transaction that is for the amount of your interest over the payment period

• If you add new transactions after calculating your interest, you must recalculate to get a correct estimate of the owed interest

With More Time...

I would've:

1. Cleaned up some of my angular templates

• Perhaps moved them to separate files

2. Made the interface a bit nicer, though angular-material is pretty cool
3. Added more unit tests to rails, though I think I covered some of the more important ones
4. Made it possible to create transactions across multiple months
5. Cleaned up the CreditLine.recalculate_transaction_balances method, and how the detection takes place in the Transaction model

Though this is probably a fair representation of the code I output over the course of a few days.

Questions?

Feel free to ask if you have any questions regarding the implementation.