topup

record topup {
  amount: s32,
  balance-transaction: option​<string>,
  created: s32,
  currency: string,
  description: option​<string>,
  expected-availability-date: option​<s32>,
  failure-code: option​<string>,
  failure-message: option​<string>,
  id: string,
  livemode: bool,
  metadata: topup-metadata,
  object: topup-object-enum,
  source: option​<string>,
  statement-descriptor: option​<string>,
  status: topup-status-enum,
  transfer-group: option​<string>,
}