Abandoned Cart Auto-Expiring Coupon

It would be great if we could somehow automatically create and insert a single use coupon in our abandoned cart emails that have a set expiry time.

For example, a coupon that is good for 72hours only which will grant the person 15% off etc.

This dynamic coupon creation with expiration time would likely be very useful in other areas too (like a congratulations coupon for completing a course to get a discount on another course etc)