t() :: %Omise.Reference{
  barcode: String.t(),
  customer_amount: integer(),
  customer_currency: String.t(),
  customer_exchange_rate: float(),
  device_id: String.t(),
  expires_at: String.t(),
  omise_tax_id: String.t(),
  payment_code: term(),
  reference_number_1: String.t(),
  reference_number_2: String.t(),
  va_code: String.t()
}