Function: Retrieve the discount code.

Function: Retrieve the discount code start date.

Function: Retrieve the discount code expiration date.

Function: Get Discount.

Function: Get Discount By Code.

Function: Retrieve discount by a given field

Function: Stores a discount code. If the code already exists, it updates it, otherwise it creates a new one.

Function: Updates a discount’s status from one status to another.

Function: Checks to see if a discount code already exists.