Liquid Template Variables - discount
From Spiffy Stores Knowledge Base
A discount represents single discount that has been applied to an order.
discount.code
Returns the code used for the discount.
{{ discount.code }} => 'SELLOUT10'
discount.savings
Returns the amount of the discount that has been applied to the order. A money filter can be used to return the value as a monetary amount.
{{ discount.savings | money }} => $45.21