import { Transport } from './transport.js';
import { MCPMessage } from './types.js';
/**
 * TCP transport implementation for network MCP communication
 * Compatible with C++ duckdb_mcp TCP mode
 */
export declare class TCPTransport extends Transport {
    private host;
    private port;
    private socket?;
    private connected;
    private buffer;
    private messageQueue;
    private waitingResolvers;
    private reconnectAttempts;
    private maxReconnectAttempts;
    private reconnectDelay;
    private keepAliveInterval?;
    constructor(host: string, port: number);
    connect(): Promise<void>;
    disconnect(): Promise<void>;
    send(message: MCPMessage): Promise<void>;
    receive(): AsyncIterator<MCPMessage>;
    isConnected(): boolean;
    /**
     * Process the input buffer and extract complete messages
     */
    private processBuffer;
    /**
     * Start keep-alive mechanism
     */
    private startKeepAlive;
    /**
     * Stop keep-alive mechanism
     */
    private stopKeepAlive;
    /**
     * Send a ping message to check connection health
     */
    private sendPing;
    /**
     * Attempt to reconnect with exponential backoff
     */
    private attemptReconnect;
    /**
     * Wait for the next message
     */
    private waitForMessage;
    /**
     * Resolve waiting iterators when new messages arrive or connection closes
     */
    private resolveWaitingIterators;
    /**
     * Get socket state (for debugging)
     */
    getSocketState(): string;
}
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