text: /*
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
  
  'use strict';
  
  const Message = require('./message');
  const MessageTypes = require('./../utils/constants').Messages.Types;
  
  /**
   * Class for the "txUpdate" message.
   */
  class TxUpdateMessage extends Message {
      /**
       * Constructor for a "txUpdate" message instance.
       * @param {string} sender The sender of the message.
       * @param {string[]} recipients The recipients of the message.
       * @param {object} content The content of the message.
       * @param {string} date The date string of the message.
       * @param {string} error The potential error associated with the message.
       */
      constructor(sender, recipients, content, date = undefined, error = undefined) {
          super(sender, recipients, MessageTypes.TxUpdate, content, date, error);
          // the local observers needs this content, deep-deep down
          this.content.type = MessageTypes.TxUpdate;
      }
  }
  
  module.exports = TxUpdateMessage;
  