import { Transport } from './transport';
import * as protobuf from "./aws-iot-tunnel/protobuf-messages";
export type TunnelMessage = protobuf.com.amazonaws.iot.securedtunneling.IProtocolV1Message | protobuf.com.amazonaws.iot.securedtunneling.IProtocolV2Message | protobuf.com.amazonaws.iot.securedtunneling.IProtocolV3Message;
export declare const TunnelMessageType: {
    readonly UNKNOWN: 0;
    readonly DATA: 1;
    readonly STREAM_START: 2;
    readonly STREAM_RESET: 3;
    readonly SESSION_RESET: 4;
    readonly SERVICE_IDS: 5;
    readonly CONNECTION_START: 6;
    readonly CONNECTION_RESET: 7;
};
export type TunnelMessageTypeEnum = (typeof TunnelMessageType)[keyof typeof TunnelMessageType];
export interface SecureTunnelConfig {
    region: string;
    accessToken: string;
    clientMode: "source" | "destination";
    serviceId?: string;
    protocol?: "V1" | "V2" | "V3";
}
/**
 * AWS IoT Secure Tunnel Transport implementation
 * Handles the WebSocket connection to AWS IoT Secure Tunneling service
 * and manages the protocol-specific message framing
 */
export declare class SecureTunnelTransport implements Transport {
    private ws;
    private config;
    private streamId;
    private connectionId;
    private isConnected;
    private tunnelReady;
    private messageQueue;
    private receiveBuffer;
    private messageClass;
    id: string;
    onData?: (data: Uint8Array) => void;
    onError?: (error: Error) => void;
    onClose?: () => void;
    constructor(id: string, config: SecureTunnelConfig);
    /**
     * Connect to AWS IoT Secure Tunnel WebSocket endpoint
     */
    connect(): Promise<void>;
    /**
     * Disconnect from the tunnel
     */
    disconnect(): Promise<void>;
    /**
     * Send data through the tunnel
     */
    send(data: Uint8Array): Promise<void>;
    /**
     * Process queued messages once tunnel is ready
     */
    private processQueuedMessages;
    /**
     * Build the WebSocket URL for AWS IoT Secure Tunneling
     */
    private buildWebSocketUrl;
    /**
     * Send a control message through the tunnel
     */
    private sendControlMessage;
    /**
     * Send a data frame through the tunnel
     */
    private sendDataFrame;
    /**
     * Send a frame with length prefix
     */
    private sendFrame;
    /**
     * Handle incoming WebSocket data
     */
    private handleIncomingData;
    /**
     * Handle a decoded tunnel message
     */
    private handleMessage;
    /**
     * Encode a message using protobufjs
     */
    private encodeMessage;
    /**
     * Decode a message using protobufjs
     */
    private decodeMessage;
    /**
     * Get message type name for logging
     */
    private getMessageTypeName;
}
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