OptionalbankThe owning bank, when the mutated transaction is bank-routed (deposits, withdrawals). When present, the realtime nudge is additionally published on the bank's channel so the bank dashboard refreshes without subscribing to a network-wide firehose. Omit for bankless transactions — the customer and operator channels still fire.
The external customer id, as carried in the emitted transaction event.
External ids of the rows this mutation touched for that customer. A transfer names the same id once per leg's customer.
One customer's side of a transaction write, for TransactionCacheBuster.