import { IBroker, MessageHandler, PublishOptions, SubscribeOptions } from '../types';
import { MqttConfig } from '../config';
import { EventEmitter } from 'events';
export declare class MqttBroker extends EventEmitter implements IBroker {
    private client;
    private connected;
    private messageHandler?;
    private subscribedTopics;
    constructor(config: MqttConfig);
    connect(): Promise<void>;
    publish(topic: string, message: string | Buffer, options?: PublishOptions): Promise<void>;
    subscribe(topics: string[], handler: MessageHandler, options?: SubscribeOptions): Promise<void>;
    disconnect(): Promise<void>;
    isConnected(): boolean;
    private isConnectionError;
}
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