net.corda.core.messaging / FlowHandle / <init>

# <init>

`FlowHandle(id: StateMachineRunId, progress: <ERROR CLASS><String>, returnValue: <ERROR CLASS><A>)`

FlowHandle is a serialisable handle for the started flow, parameterised by the type of the flows return value.

### Parameters

`id` - The started state machines ID.
`progress` - The stream of progress tracker events.
`returnValue` - An Observable emitting a single event containing the flows return value. To block on this value: val returnValue = rpc.startFlow(::MyFlow).returnValue.toBlocking().first()