import { EventEmitter } from 'events';
/**
 * Builds Endpoint Analytics (EA) event payloads and sends them to
 *   the EA server.
 * @constructor
 * @param {String} productName - Name of the product publishing events.
 * @param {String} token - The JWT token to use to authenticate with
 *   the EA server.
 * @param {EventPublisher.Options} options
 * @property {Boolean} isEnabled - Whether or not this publisher is publishing
 *   to the server. Currently ignores the request altogether, in the future this
 *   may store them in case publishing is re-enabled later. Defaults to true.
 */
/**
 * @typedef {Object} EventPublisher.Options
 * @property {Object} [metadata=undefined] - A publisher_metadata object to send
 *   with each payload.
 * @property {String} [host='eventgw.twilio.com'] - The host address of the EA
 *   server to publish to.
 * @property {Object|Function} [defaultPayload] - A default payload to extend
 *   when creating and sending event payloads. Also takes a function that
 *   should return an object representing the default payload. This is
 *   useful for fields that should always be present when they are
 *   available, but are not always available.
 */
declare class EventPublisher extends EventEmitter {
    constructor(productName: any, token: any, options: any);
}
export default EventPublisher;