TBD

State Diagram

```text

• RpcReq Client ---> Server (req/rsp) ✓ RpcReqSlot

  • ServerError

• RpcRslt Server ---> Server (streaming)

• RpcReqRslt Client ---> Server (req/rsp) ✓ RpcRslt

  • ServerError

• Sub Client ---> Server ✓ RpcRslt

  • ServerError ```