Single-use fixed value coupon behaviour

[Jonathan Moore]

I have a query about the behaviour of coupons with fixed value and restricted usage.

Scenario:
Coupon:
– Fixed basket discount 50
– Usage limit per coupon 1
add item worth 5 to basket, apply coupon and checkout.

Desired outcome: remaining coupon value of 45 should be usable
Actual outcome: coupon is marked as already used

Is it possible to change or override this behaviour?
If it is not currently possible or desirable to change the default behaviour, could a filter be added so users can override the behaviour.

The logic would be,
If the coupon (usage_limit==1) && (discount_type=’fixed_cart’) && (cart_value < coupon_amount)
//don’t mark the coupon as used, instead decrease the coupon amount

.. unless you have any other suggestion!

[Soft79]

Usage limit can not be used to limit the coupon value for a next-time-use. This is only possible by creating a custom plugin or script in functions.php

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