import { OnModuleDestroy, OnModuleInit } from "@nestjs/common";
export declare class MqttService implements OnModuleInit, OnModuleDestroy {
    private mqttClient;
    constructor();
    onModuleInit(): void;
    onModuleDestroy(): void;
    publish(topic: string, message: string): void;
    subscribe(topic: string): void;
    handleMessage(callback: (topic: string, message: Buffer) => void): void;
}