jitsi_app_c0/modules/transport/constants.js

/**
 * The message type for events.
 *
 * @type {string}
 */
export const MESSAGE_TYPE_EVENT = 'event';

/**
 * The message type for requests.
 *
 * @type {string}
 */
export const MESSAGE_TYPE_REQUEST = 'request';

/**
 * The message type for responses.
 *
 * @type {string}
 */
export const MESSAGE_TYPE_RESPONSE = 'response';