ConnectApi.PromotionCoupon

A coupon used in a promotion.

Property Name	Type	Description	Available Version
`couponCode`	String	Coupon code.	57.0
`couponErrorCode`	String	Error code returned if the coupon is invalid.	57.0
`id`	String	ID of the coupon.	57.0
`isValidCoupon`	Boolean	Indicates whether the coupon is valid (`true`) or invalid (`false`).	57.0

Apex Reference Guide