Filter: wu_cart_discount_rate

Filter the coupon rate before discounts and taxes are calculated.

Currency addons can convert absolute amounts without changing the persisted coupon. Percentage rates must remain percentages.

Parameters

Name	Type	Description
$rate	`float`	Discount rate in the store's base currency.
$line_item	`\Line_Item`	Item receiving the validated coupon.
$cart	`\Cart`	Cart providing the target currency.