includes/lib/stripe-php/lib/Service/PromotionCodeService.php

Method: Returns a list of your promotion codes.

Method: A promotion code points to a coupon. You can optionally restrict the code to a specific customer, redemption limit, and expiration date.

Method: Retrieves the promotion code with the given ID.

Method: Updates the specified promotion code by setting the values of the parameters passed. Most fields are, by design, not editable.