Streaming Types (Unreal)

Overview

These types define the data structures used across the LCK streaming API for checking streaming targets, authentication state, login flow data, and subscription status.

ELCKStreamingTargetType

The type of streaming destination configured by the user.

UENUM(BlueprintType)
enum class ELCKStreamingTargetType : uint8
{
    None     UMETA(DisplayName = "None"),
    YouTube  UMETA(DisplayName = "YouTube"),
    Twitch   UMETA(DisplayName = "Twitch"),
    Manual   UMETA(DisplayName = "Manual RTMP")
};

Value	Description
`None`	No streaming target configured
`YouTube`	Streaming to YouTube Live
`Twitch`	Streaming to Twitch
`Manual`	Custom RTMP URL

ELCKStreamingState

The current state of the streaming UI system (defined in LCKUI).

UENUM(BlueprintType)
enum class ELCKStreamingState : uint8
{
    Idle,
    Pairing,
    Paired,
    Streaming,
    Error,
    MAX
};

Value	Description
`Idle`	No active streaming session
`Pairing`	Device login in progress
`Paired`	Authenticated, ready to stream
`Streaming`	Live stream is active
`Error`	An error occurred

FLCKUserSubscription

Represents a user’s LIV subscription status.

USTRUCT(BlueprintType)
struct LCKSTREAMING_API FLCKUserSubscription
{
    GENERATED_BODY()

    UPROPERTY(BlueprintReadOnly, Category = "LCK|Streaming")
    FString Sku;

    UPROPERTY(BlueprintReadOnly, Category = "LCK|Streaming")
    bool bIsActive = false;
};

Field	Type	Description
`Sku`	`FString`	Subscription SKU identifier
`bIsActive`	`bool`	`true` if the subscription is currently active

FLCKLoginAttempt

Data for an in-progress device-code login attempt.

USTRUCT(BlueprintType)
struct LCKSTREAMING_API FLCKLoginAttempt
{
    GENERATED_BODY()

    UPROPERTY(BlueprintReadOnly, Category = "LCK|Streaming")
    FString Code;

    UPROPERTY(BlueprintReadOnly, Category = "LCK|Streaming")
    FString Id;

    UPROPERTY(BlueprintReadOnly, Category = "LCK|Streaming")
    FString ExpiresAt;
};

Field	Type	Description
`Code`	`FString`	The pairing code the user enters at the pairing URL
`Id`	`FString`	Internal identifier for this login attempt
`ExpiresAt`	`FString`	ISO 8601 timestamp for when this pairing code expires

FLCKAuthState

Represents the current authentication state.

USTRUCT(BlueprintType)
struct LCKSTREAMING_API FLCKAuthState
{
    GENERATED_BODY()

    UPROPERTY(BlueprintReadOnly, Category = "LCK|Streaming")
    FString UserId;

    UPROPERTY(BlueprintReadOnly, Category = "LCK|Streaming")
    bool bIsAuthenticated = false;
};

Field	Type	Description
`UserId`	`FString`	The authenticated user’s unique identifier
`bIsAuthenticated`	`bool`	`true` if the user is currently authenticated

Key Takeaways

All types are BlueprintType — Usable in Blueprint graphs

Check target type — Show appropriate platform icon in UI

Subscription gating — Check HasActiveSubscription() before enabling streaming

ExpiresAt is ISO 8601 — Parse if you need a countdown timer

Streaming Subsystem — Uses these types
Streaming Feature Interface — C++ interface
Enums Reference — All LCK enums
Types Reference — Core LCK types

Core SDK

Tablet Interface

Tablet Customization

Audio

Streaming

API Reference

Overview

ELCKStreamingTargetType

ELCKStreamingState

FLCKUserSubscription

FLCKLoginAttempt

FLCKAuthState

Key Takeaways

​Overview

​ELCKStreamingTargetType

​ELCKStreamingState

​FLCKUserSubscription

​FLCKLoginAttempt

​FLCKAuthState

​Key Takeaways

​Related

Overview

ELCKStreamingTargetType

ELCKStreamingState

FLCKUserSubscription

FLCKLoginAttempt

FLCKAuthState

Key Takeaways

Related