> ## Documentation Index
> Fetch the complete documentation index at: https://cantonfoundation-update-ref-tables.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# CommandCompletionServiceGrpc.CommandCompletionServiceFutureStub

> A stub to allow clients to do ListenableFuture-style rpc calls to service CommandCompletionService. Allows clients to observe the status of their submissions. Commands may be submitted via the Command Submission Service. The on-ledger effects of their submissions are disclosed by the Update Service. Commands may fail in 2 distinct manners: 1. Failure communicated synchronously in the gRPC error of the submission. 2. Failure communicated asynchronously in a Completion, see ``completion.proto``. Note that not only successfully submitted commands MAY produce a completion event. For example, the participant MAY choose to produce a completion event for a rejection of a duplicate command. Clients that do not receive a successful completion about their submission MUST NOT assume that it was successful. Clients SHOULD subscribe to the CompletionStream before starting to submit commands to prevent race conditions.

## CommandCompletionServiceGrpc.CommandCompletionServiceFutureStub

Upstream docs: [Open](https://javadoc.io/doc/com.daml/bindings-java/3.5.6/com/daml/ledger/api/v2/CommandCompletionServiceGrpc.CommandCompletionServiceFutureStub.html)

**Signature**

```text theme={"theme":{"light":"github-light","dark":"github-dark"}}
public static final class CommandCompletionServiceGrpc.CommandCompletionServiceFutureStub extends io.grpc.stub.AbstractFutureStub<CommandCompletionServiceGrpc.CommandCompletionServiceFutureStub>
```

**Members**

| Docs                                                                                                                                                                                                   | Member                        | Introduced | Deprecated | Removed |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------- | ---------- | ---------- | ------- |
| [Open](https://javadoc.io/doc/com.daml/bindings-java/3.5.6/com/daml/ledger/api/v2/CommandCompletionServiceGrpc.CommandCompletionServiceFutureStub.html#build%28io.grpc.Channel,io.grpc.CallOptions%29) | `build(Channel, CallOptions)` | `3.5.6`    | -          | -       |