Cancel multiple orders.
Platform Support: Available on hyperliquid, aster, lighter. Not available on kuru.
Required for symbol-scoped cancellation
symbol, all Future timestamp for scheduled cancel
Abort scheduled cancel operation
immediate, scheduled, abort_scheduled Orders canceled successfully
Timestamp when HyperETH API server received this message from the venue (in milliseconds)
Timestamp when HyperETH API server completed all processing before returning to client (in milliseconds)