POST /v2/wires/{wire_id}/cancel on an eligible outgoing wire moves it to cancel_pending.
Incoming and outgoing wires have different lifecycles.
Incoming wires

Both are terminal. An incoming wire surfaces to you already in one of them.
Outgoing wires

posted, rejected and canceled are terminal.
Transitions
A wire reachescancel_pending only from created, scheduled or under_review — the three statuses marked cancellable above. Once a wire is processing it cannot be canceled.

