import { BlockchainDataService } from "../data/blockchain-data";
/**
 * Enhanced HTTP Server for blockchain visualization with WebSockets
 */
export declare class VisualizationServer {
    private server;
    private app;
    private io;
    private port;
    private staticDir;
    private blockchainData;
    private updateInterval;
    private connectedClients;
    constructor(blockchainData: BlockchainDataService, staticDir: string, port?: number);
    /**
     * Configure Express middleware
     */
    private configureMiddleware;
    /**
     * Configure Socket.io events
     */
    private configureSocketEvents;
    /**
     * Configure client-specific events
     */
    private configureClientEvents;
    /**
     * Configure API routes
     */
    private configureRoutes;
    /**
     * Send initial data to a newly connected client
     */
    private sendInitialData;
    /**
     * Broadcast blockchain update to all connected clients
     */
    private broadcastBlockchainUpdate;
    /**
     * Start the real-time updates
     */
    private startRealTimeUpdates;
    /**
     * Stop the real-time updates
     */
    private stopRealTimeUpdates;
    /**
     * Start the server
     */
    start(): Promise<void>;
    /**
     * Stop the server
     */
    stop(): Promise<void>;
}