@type t() :: %MVola.Types.TransactionRequest{
  amount: integer(),
  credit_party: list(),
  currency: String.t(),
  debit_party: list(),
  description_text: String.t(),
  metadata: map(),
  original_transaction_reference: String.t(),
  request_date: String.t(),
  requesting_organisation_transaction_reference: String.t()
}