@type t() :: %DodoPayments.Discount{
  amount: number() | nil,
  business_id: String.t() | nil,
  code: String.t() | nil,
  created_at: String.t() | nil,
  currency_options:
    [DodoPayments.ResponseTypes.discount_currency_option()] | nil,
  customer_eligibility: DodoPayments.Enums.decoded_customer_eligibility() | nil,
  discount_id: String.t() | nil,
  expires_at: String.t() | nil,
  extra: map(),
  metadata: DodoPayments.ResponseTypes.metadata() | nil,
  name: String.t() | nil,
  per_customer_usage_limit: number() | nil,
  preserve_on_plan_change: boolean() | nil,
  restricted_to: [String.t()] | nil,
  starts_at: String.t() | nil,
  subscription_cycles: number() | nil,
  times_used: number() | nil,
  type: DodoPayments.Enums.decoded_discount_type() | nil,
  usage_limit: number() | nil
}