add support to milti transaction

orders-events/app/iugu.py

@@ -71,6 +71,7 @@ class Order(BaseModel):
     address: Address
     items: tuple[Item, ...]
     payment_method: PaymentMethod
+    discount: Decimal = Decimal('0')
     cpf: str | None = None
     cnpj: str | None = None
 
@@ -127,6 +128,7 @@ class Iugu:
             }
             for item in order.items
         ]
+
         payload = {
             'order_id': order.id,
             'external_reference': order.id,
@@ -135,6 +137,7 @@ class Iugu:
             'email': order.email,
             'payable_with': order.payment_method.lower(),
             'notification_url': postback_url.geturl(),
+            'discount_cents': int(order.discount * -100),
             'payer': {
                 'name': order.name,
                 'email': order.email,