import { GCPubSub, GooglePubSubOptions } from '@algoan/pubsub';
import { Logger } from '@nestjs/common';
import { ClientProxy, ReadPacket } from '@nestjs/microservices';
export type GCPubSubClientOptions = GooglePubSubOptions & {
    messageMetadataKey?: string;
};
export declare class GCPubSubClient extends ClientProxy {
    protected logger: Logger;
    protected pubSub?: GCPubSub;
    private readonly options?;
    constructor(options?: GCPubSubClientOptions);
    connect(): Promise<void>;
    close(): Promise<void>;
    unwrap<T>(): T;
    dispatchEvent(_packet: ReadPacket): Promise<any>;
    publish(): () => void;
}