# `Stripe.Params.SubscriptionUpdateParams.AddInvoiceItems.Discounts`
[🔗](https://github.com/jeffhuen/tiger_stripe/blob/main/lib/stripe/params/subscription_update_params.ex#L135)

Nested parameters.

# `t`

```elixir
@type t() :: %Stripe.Params.SubscriptionUpdateParams.AddInvoiceItems.Discounts{
  coupon: String.t() | nil,
  discount: String.t() | nil,
  promotion_code: String.t() | nil
}
```

* `coupon` - ID of the coupon to create a new discount for. Max length: 5000.
* `discount` - ID of an existing discount on the object (or one of its ancestors) to reuse. Max length: 5000.
* `promotion_code` - ID of the promotion code to create a new discount for. Max length: 5000.

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*Consult [api-reference.md](api-reference.md) for complete listing*