import { Configuration } from '../types';
export declare class AvatarSDK {
    private static _initializationState;
    private static _initializingPromise;
    private static _configuration;
    private static readonly _version;
    private static _avatarCore;
    private static _dynamicSdkConfig;
    private static _cachedDeviceScore;
    private static _rendererBackend;
    /**
     * Initialize SDK
     * @param appId Application ID to be included in both HTTP Headers and WebSocket Headers
     * @param configuration Configuration parameters
     */
    static initialize(appId: string, configuration: Configuration): Promise<void>;
    private static _initializeInternal;
    /**
     * Set sessionToken
     * Developer Client -> Developer Server -> AvatarKit Server -> return sessionToken (max 1 hour validity)
     * Include in WebSocket Headers for avatar WebSocket service authentication
     */
    static setSessionToken(token: string): void;
    /**
     * Set userId
     * Optional interface for developers, SDK includes this in telemetry logs
     */
    static setUserId(userId: string): void;
    static get isInitialized(): boolean;
    static get appId(): string | null;
    static get configuration(): Configuration | null;
    static get sessionToken(): string | null;
    static get userId(): string | null;
    static get version(): string;
    /**
     * Cleanup resources
     */
    static cleanup(): void;
    /**
     * Device performance score (CPU + GPU).
     * CPU: matrix multiply throughput in Web Worker (warmup 1s + measure 1s).
     * GPU: WebGPU compute shader throughput (warmup 1s + measure 1s).
     * Returns 0 for GPU if WebGPU is not available.
     */
    static deviceScore(): Promise<{
        cpuScore: number;
        gpuScore: number;
    }>;
    private static readonly CPU_SCORE_THRESHOLD;
    private static readonly GPU_SCORE_THRESHOLD;
    /**
     * Check if the current device can run the avatar.
     * Runs a ~2s benchmark, reports device info and scores to PostHog.
     * Currently always returns true — thresholds will be calibrated from production data.
     */
    static isDeviceSupported(): Promise<boolean>;
    private static _getGPURenderer;
}