import { ClientProxy, ReadPacket, WritePacket } from '@nestjs/microservices';
import { GCPPubSubClientOptions } from './options';
export declare class GCPPubSubClient extends ClientProxy {
    private readonly config;
    private readonly topics;
    private readonly pubSub;
    constructor(config: GCPPubSubClientOptions);
    connect(): Promise<void>;
    close(): Promise<void>;
    unwrap<T>(): T;
    publish(_packet: ReadPacket<unknown>, _callback: (packet: WritePacket<unknown>) => void): () => void;
    dispatchEvent(packet: ReadPacket<unknown>): Promise<any>;
    private getOrCreateTopic;
}