export type InvoicingDiscountType = 'percentage' | 'fixed_amount' | 'offer_quantity';
export type InvoicingCouponDurationType = 'one_time' | 'forever' | 'limited_period';
export type InvoicingCouponStatus = 'active' | 'expired' | 'archived' | 'deleted' | 'future';
export type InvoicingCouponApplyOn = 'invoice_amount' | 'each_specified_item' | 'specified_items_total';
export type InvoicingCouponPeriodUnit = 'day' | 'week' | 'month' | 'year';