Retrieves the full details of a single internal payment (own-account transfer). A transfer that does not exist or belongs to another client returns 404. status reports where the transfer is in its lifecycle (Completed, Created, Failed). channel reports how the transfer was instructed (Portal, Api or Brokered); transfers created before the channel was recorded have no channel. createdBy is returned for Portal and Api transfers only. amount carries amountInMinorUnits alongside the same figure as a decimal value, in the transfer currency.