@type t() :: %PolarExpress.Schemas.OrderPaidMetadata{
  amount: term(),
  applied_balance_amount: term(),
  billing_type: term(),
  currency: term(),
  discount_amount: term(),
  discount_id: term(),
  net_amount: term(),
  order_id: term(),
  platform_fee: term(),
  product_id: term(),
  recurring_interval: term(),
  recurring_interval_count: term(),
  subscription_id: term(),
  tax_amount: term()
}