@type t() :: %PolarExpress.Schemas.BalanceOrderMetadata{
  amount: term(),
  currency: term(),
  exchange_rate: term(),
  fee: term(),
  net_amount: term(),
  order_id: term(),
  presentment_amount: term(),
  presentment_currency: term(),
  product_id: term(),
  subscription_id: term(),
  tax_amount: term(),
  tax_country: term(),
  tax_state: term(),
  transaction_id: term()
}