/**
 * @see https://github.com/mqttjs/MQTT.js/
 *
 * @publicApi
 */
export declare type QoS = 0 | 1 | 2;
export interface MqttClientOptions extends ISecureClientOptions {
    port?: number;
    host?: string;
    hostname?: string;
    path?: string;
    protocol?: 'wss' | 'ws' | 'mqtt' | 'mqtts' | 'tcp' | 'ssl' | 'wx' | 'wxs';
    wsOptions?: {
        [x: string]: any;
    };
    /**
     *  10 seconds, set to 0 to disable
     */
    keepalive?: number;
    /**
     * 'mqttjs_' + Math.random().toString(16).substr(2, 8)
     */
    clientId?: string;
    /**
     * 'MQTT'
     */
    protocolId?: string;
    /**
     * 4
     */
    protocolVersion?: number;
    /**
     * true, set to false to receive QoS 1 and 2 messages while offline
     */
    clean?: boolean;
    /**
     * 1000 milliseconds, interval between two reconnections
     */
    reconnectPeriod?: number;
    /**
     * 30 * 1000 milliseconds, time to wait before a CONNACK is received
     */
    connectTimeout?: number;
    /**
     * the username required by your broker, if any
     */
    username?: string;
    /**
     * the password required by your broker, if any
     */
    password?: string;
    /**
     * a any for the incoming packets
     */
    incomingStore?: any;
    /**
     * a any for the outgoing packets
     */
    outgoingStore?: any;
    queueQoSZero?: boolean;
    /**
     *  properties MQTT 5.0.
     */
    properties?: {
        /**
         * representing the Session Expiry Interval in seconds
         */
        sessionExpiryInterval?: number;
        /**
         * representing the Receive Maximum
         */
        receiveMaximum?: number;
        /**
         * representing the Maximum Packet Size the Client is willing to accept
         */
        maximumPacketSize?: number;
        /**
         * representing the Topic Alias Maximum value indicates the highest value that the Client will accept as a Topic Alias sent by the Server
         */
        topicAliasMaximum?: number;
        /**
         * The Client uses this value to request the Server to return Response Information in the CONNACK
         */
        requestResponseInformation?: boolean;
        /**
         * The Client uses this value to indicate whether the Reason String or User Properties are sent in the case of failures
         */
        requestProblemInformation?: boolean;
        /**
         * The User Property is allowed to appear multiple times to represent multiple name, value pairs
         */
        userProperties?: object;
        /**
         * the name of the authentication method used for extended authentication
         */
        authenticationMethod?: string;
        /**
         * * Binary Data containing authentication data (binary type)
         * */
        authenticationData?: any;
    };
    reschedulePings?: boolean;
    servers?: Array<{
        host: string;
        port: number;
    }>;
    /**
     * true, set to false to disable re-subscribe functionality
     */
    resubscribe?: boolean;
    /**
     * a message that will sent by the broker automatically when the client disconnect badly.
     */
    will?: {
        /**
         * the topic to publish
         */
        topic: string;
        /**
         * the message to publish
         */
        payload: string;
        /**
         * the QoS
         */
        qos: QoS;
        /**
         * the retain flag
         */
        retain: boolean;
    };
    transformWsUrl?: (url: string, options: any, client: any) => string;
}
export interface ISecureClientOptions {
    /**
     * optional private keys in PEM format
     */
    key?: string | string[] | Buffer | Buffer[] | Record<string, any>[];
    /**
     * optional cert chains in PEM format
     */
    cert?: string | string[] | Buffer | Buffer[];
    /**
     * Optionally override the trusted CA certificates in PEM format
     */
    ca?: string | string[] | Buffer | Buffer[];
    rejectUnauthorized?: boolean;
}
export interface IClientPublishOptions {
    /**
     * the QoS
     */
    qos: QoS;
    /**
     * the retain flag
     */
    retain?: boolean;
    /**
     * whether or not mark a message as duplicate
     */
    dup?: boolean;
}
export interface IClientSubscribeOptions {
    /**
     * the QoS
     */
    qos: QoS;
}
export interface IClientReconnectOptions {
    /**
     * a any for the incoming packets
     */
    incomingStore?: any;
    /**
     * a any for the outgoing packets
     */
    outgoingStore?: any;
}