import ServiceRequest from "./ServiceRequest.js";
import ServiceResponse from "./ServiceResponse.js";
import Ros from "./Ros.js";
import EventEmitter2 from "eventemitter2";
declare type ServiceHandler = (message: ServiceRequest, response: ServiceResponse) => boolean;
/**
 * A ROS service client.
 *
 * @constructor
 * @params options - possible keys include:
 *   * ros - the ROSLIB.Ros connection handle
 *   * name - the service name, like /add_two_ints
 *   * serviceType - the service type, like 'rospy_tutorials/AddTwoInts'
 */
declare class Service extends EventEmitter2 {
    ros: Ros;
    name: string;
    serviceType: string;
    isAdvertised: boolean;
    _serviceCallback: ServiceHandler;
    constructor(options?: {
        ros?: Ros;
        name?: string;
        serviceType?: string;
    });
    callService(request?: ServiceRequest): Promise<any>;
    /**
     * Advertise the service. This turns the Service object from a client
     * into a server. The callback will be called with every request
     * that's made on this service.
     *
     * @param callback - This works similarly to the callback for a C++ service and should take the following params:
     *   * request - the service request
     *   * response - an empty dictionary. Take care not to overwrite this. Instead, only modify the values within.
     *   It should return true if the service has finished successfully,
     *   i.e. without any fatal errors.
     */
    advertise(callback: ServiceHandler): void;
    unadvertise(): void;
    _serviceResponse(rosbridgeRequest: any): void;
}
export default Service;
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