@type t() :: %Ramp.Transactions.Transaction{
  accounting_fields: [Ramp.AccountingFieldSelection.t()],
  amount: integer() | nil,
  card_id: String.t() | nil,
  created_at: DateTime.t() | nil,
  currency_code: String.t() | nil,
  id: String.t(),
  memo: String.t() | nil,
  merchant_id: String.t() | nil,
  merchant_name: String.t() | nil,
  policy_violations: [Ramp.PolicyViolation.t()],
  receipts: [Ramp.Transactions.Receipt.t()],
  sk_category_name: String.t() | nil,
  state: String.t() | nil,
  sync_status: String.t() | nil,
  updated_at: DateTime.t() | nil,
  user_id: String.t() | nil
}