# `Stripe.Params.PromotionCodeUpdateParams.Restrictions`
[🔗](https://github.com/jeffhuen/tiger_stripe/blob/main/lib/stripe/params/promotion_code_update_params.ex#L20)

Nested parameters.

# `t`

```elixir
@type t() :: %Stripe.Params.PromotionCodeUpdateParams.Restrictions{
  currency_options:
    %{
      required(String.t()) =>
        Stripe.Params.PromotionCodeUpdateParams.Restrictions.CurrencyOptions.t()
    }
    | nil
}
```

* `currency_options` - Promotion codes defined in each available currency option. Each key must be a three-letter [ISO currency code](https://www.iso.org/iso-4217-currency-codes.html) and a [supported currency](https://stripe.com/docs/currencies).

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