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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.

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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")
};
ValueDescription
NoneNo streaming target configured
YouTubeStreaming to YouTube Live
TwitchStreaming to Twitch
ManualCustom RTMP URL

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ELCKStreamingState

The current state of the streaming UI system (defined in LCKUI). 
UENUM(BlueprintType)
enum class ELCKStreamingState : uint8
{
    Idle,
    Pairing,
    Paired,
    Streaming,
    Error,
    MAX
};
ValueDescription
IdleNo active streaming session
PairingDevice login in progress
PairedAuthenticated, ready to stream
StreamingLive stream is active
ErrorAn error occurred

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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;
};
FieldTypeDescription
SkuFStringSubscription SKU identifier
bIsActivebooltrue if the subscription is currently active

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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;
};
FieldTypeDescription
CodeFStringThe pairing code the user enters at the pairing URL
IdFStringInternal identifier for this login attempt
ExpiresAtFStringISO 8601 timestamp for when this pairing code expires

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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;
};
FieldTypeDescription
UserIdFStringThe authenticated user’s unique identifier
bIsAuthenticatedbooltrue if the user is currently authenticated

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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