# RaftService contracts (namespace mode ops)

## GetMode

- **RPC**: `RaftService/GetMode`
- **Request**: `namespace: string` (empty => `default`)
- **Response**: `mode: string` (`"strong"` or `"eventual"`)

## UpdateNamespaceMode

- **RPC**: `RaftService/UpdateNamespaceMode`
- **Request**:
  - `namespace: string` (required)
  - `mode: string` (`"strong"` or `"eventual"`, required)
- **Response**: `mode` object
  - `namespace: string`
  - `id: uint32`
  - `mode: string`
  - `from_default: bool` (true if created implicitly)

## ListNamespaceModes

- **RPC**: `RaftService/ListNamespaceModes`
- **Request**: empty
- **Response**: `namespaces[]`
  - `namespace: string`
  - `id: uint32`
  - `mode: string`
  - `from_default: bool`

### Error cases
- `InvalidArgument` when mode is not `"strong"` or `"eventual"` or namespace is empty for updates.
- `FailedPrecondition` if Raft messages are addressed to a different peer.