Updates a coupon.
The updateCoupon() function returns a Promise that resolves when the coupon is updated.
Only the properties passed in the specification object will be updated. All other properties will remain the same.
To remove a value from the coupon, pass its corresponding property with a value of null.
When updating a coupon, you cannot change the coupon's type. For example, if the coupon's type is moneyOffAmount, you cannot change it to fixedPriceAmount. You can update the coupon type's value. For example, you can change the value of moneyOffAmount from 5 to 10.
The coupon scope defines the items a coupon applies to. A coupon can apply to all items in a specific Wix application, a group within the application, or a single item within a group.
See the introduction for a table of currently supported coupon scopes.
This function requires elevated permissions and runs only on the backend and on dashboard pages.
ID of the coupon to update.
Coupon information to update.
Field mask of fields to update (required - passing an empty fieldMask will return an error). Valid field masks are any of those in the specification field.