import { HandrailsClient } from '../handrails/client';
export interface BridgeMessage {
    jsonrpc: '2.0';
    id?: string;
    method?: string;
    params?: any;
    result?: any;
    error?: {
        code: number;
        message: string;
        data?: any;
    };
}
export type ToolHandler = (params: any) => Promise<any>;
export declare class BridgeDaemon {
    private ws;
    private apiUrl;
    private apiKey;
    private machineName;
    private connectionId;
    private reconnectAttempts;
    private maxReconnectAttempts;
    private reconnectTimer;
    private heartbeatTimer;
    private isShuttingDown;
    private toolHandlers;
    private pendingResponses;
    private client;
    private activeEngines;
    constructor(apiUrl?: string, apiKey?: string);
    private registerBuiltinTools;
    registerTool(method: string, handler: ToolHandler): void;
    start(): Promise<void>;
    private connect;
    private handleMessage;
    private send;
    private sendResponse;
    sendNotification(method: string, params?: any): void;
    /**
     * Send a request to the server and wait for a response.
     * Used for workflow decision nodes that need user input from the web UI.
     */
    sendRequestAndWait(method: string, params?: any, timeoutMs?: number): Promise<any>;
    getClient(): HandrailsClient;
    getConnectionId(): string | null;
    private startHeartbeat;
    private stopHeartbeat;
    private scheduleReconnect;
    private shutdown;
}