> ## Documentation Index
> Fetch the complete documentation index at: https://docs.liv.tv/llms.txt
> Use this file to discover all available pages before exploring further.

# LckStreamingController

> How to implement the LIV Hub login, subscription check, and live streaming workflow in Unity VR apps using the LIV Camera Kit (LCK) SDK.

## Description

`LckStreamingController` is a Unity `MonoBehaviour` that guides users through the steps required before they can live stream with LIV Hub: logging in, verifying their subscription, and confirming stream configuration. It runs as a state machine that advances through each check automatically, then enables the stream toggle once everything is validated.

This class is a reference implementation — you can use it directly or extend it to build custom UI/UX flows. At runtime it integrates with `ILckService` for starting/stopping streams and `ILckCore` for authentication and user status checks.

***

## Usage

Use `LckStreamingController` to manage the full streaming setup flow. Attach it to a GameObject, connect a `LckNotificationController` for user messages, and wire your stream button to `StreamingButtonToggled()`.

```c# theme={null}
[SerializeField] private LckStreamingController _streamingController;

public void OnStreamButtonPressed()
{
    _streamingController.StreamingButtonToggled();
}
```

Call `CheckCurrentState()` when the user opens the streaming UI to kick off the validation state machine.

***

## References

### Properties

| Property                     | Type                                   | Description                                                                                                      |
| :--------------------------- | :------------------------------------- | :--------------------------------------------------------------------------------------------------------------- |
| **IsConfiguredCorrectly**    | `bool`                                 | Indicates whether user setup and validation have been completed. When `true`, streaming can be toggled directly. |
| **CurrentState**             | `LckStreamingBaseState`                | The currently active state in the streaming state machine.                                                       |
| **CheckConfiguredState**     | `LckStreamingCheckConfiguredState`     | State for verifying if the user has already configured streaming.                                                |
| **ShowCodeState**            | `LckStreamingShowCodeState`            | State for showing the user their login code.                                                                     |
| **CheckSubscribedState**     | `LckStreamingCheckSubscribedState`     | State for verifying if the user has an active subscription.                                                      |
| **WaitingForConfigureState** | `LckStreamingWaitingForConfigureState` | State for waiting while the user configures streaming in LIV Hub.                                                |
| **ConfiguredCorrectlyState** | `LckStreamingConfiguredCorrectlyState` | State indicating setup is complete and the user can start streaming.                                             |
| **CancellationTokenSource**  | `CancellationTokenSource`              | Token used to cancel any ongoing async tasks when switching states or destroying the object.                     |
| **LckCore**                  | `ILckCore`                             | Provides access to the LIV Core SDK for authentication and user status checks.                                   |

### Methods

| Method                                       | Returns | Description                                                                                                  |
| :------------------------------------------- | :------ | :----------------------------------------------------------------------------------------------------------- |
| **CheckCurrentState()**                      | `void`  | Starts the setup/validation state machine from the beginning (`CheckConfiguredState`).                       |
| **StopCheckingStates()**                     | `void`  | Cancels any ongoing async checks or polling in the current state. Useful when leaving the streaming UI.      |
| **SwitchState(LckStreamingBaseState state)** | `void`  | Switches to a new streaming state, cancelling pending operations and updating `IsConfiguredCorrectly`.       |
| **StreamingButtonToggled()**                 | `void`  | Toggles streaming: if configured, starts/stops streaming; if not configured, invokes `_onStreamButtonError`. |
| **StopStreaming()**                          | `void`  | Force stops streaming if a stream is currently active.                                                       |
| **ShowNotification(NotificationType type)**  | `void`  | Displays a notification via the linked `LckNotificationController`.                                          |
| **HideNotifications()**                      | `void`  | Hides currently visible notifications.                                                                       |
| **SetNotificationStreamCode(string code)**   | `void`  | Updates the notification UI with a login/streaming code.                                                     |
| **Log(string message)**                      | `void`  | Logs debug messages if `_showDebugLogs` is enabled.                                                          |
| **LogError(string error)**                   | `void`  | Logs error messages if `_showDebugLogs` is enabled.                                                          |

***

## See Also

* [ILckService](/api-reference/unity/interfaces/ILckService) — Service interface used to start/stop streams
* [ILckCore](/api-reference/unity/interfaces/core/ILckCore) — Core interface used for authentication and subscription checks
* [LckNotificationController](/api-reference/unity/classes/LckNotificationController) — Displays login codes, errors, and configuration prompts during the flow
* [LckService](/api-reference/unity/classes/LckService) — Default ILckService implementation with streaming methods