import { AbstractMessageHandler, CallAction, IMessageHandler, IModule, SystemConfig } from '@citrineos/base';
import { ILogObj, Logger } from 'tslog';
/**
 * Implementation of a {@link IMessageHandler} using Kafka as the underlying transport.
 */
export declare class KafkaReceiver extends AbstractMessageHandler implements IMessageHandler {
    /**
     * Fields
     */
    private _client;
    private _topicName;
    private _consumerMap;
    constructor(config: SystemConfig, logger?: Logger<ILogObj>, module?: IModule);
    subscribe(identifier: string, actions?: CallAction[], filter?: {
        [k: string]: string;
    }): Promise<boolean>;
    unsubscribe(identifier: string): Promise<boolean>;
    shutdown(): Promise<void>;
    /**
     * Private Methods
     */
    /**
     * Underlying Kafka message handler.
     *
     * @param message The kafka message to process
     */
    private _onMessage;
}