madeline-ton/dist/session/messageIdHandler.js

Pure JS client-side implementation of the Telegram TON blockchain protocol

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var _long = _interopRequireDefault(require("../lib/bigint/long"));

var MessageIdHandler =
/*#__PURE__*/
function () {
  function MessageIdHandler() {
    (0, _classCallCheck2["default"])(this, MessageIdHandler);
    this.maxIncoming = new _long["default"](0, 0);
    this.maxOutgoing = new _long["default"](0, 0);
  }
  /**
   * Check incoming message ID
   * @param {number[]} id 
   * @param {boolean}  container Whether the message ID is from a container 
   * @returns Long
   */


  (0, _createClass2["default"])(MessageIdHandler, [{
    key: "check",
    value: function check(id, container) {
      id = new _long["default"](id[0], id[1]);
      var min = new _long["default"](0, Date.now() / 1000 - 300);

      if (min.compare(id) > 0) {
        throw new Error("Given message ID (".concat(id, ") is too old compared to the min value (").concat(min, ")"));
      }

      var max = new _long["default"](0, Date.now() / 1000 + 30);

      if (max.compare(id) < 0) {
        throw new Error("Given message ID (".concat(id, ") is too new compared to the max value (").concat(max, ")"));
      }

      var and = id.and(_long["default"].THREE);

      if (and.high_ !== 0 && and.low_ !== 1 && and.low_ !== 3) {
        throw new Error("Given message ID mod 4 != 1 or 3");
      }

      if (container) {
        if (id.compare(this.maxIncoming) >= 0) {
          throw new Error("Wrong container message ID (".concat(id, ")"));
        }
      } else {
        if (id.compare(this.maxIncoming) <= 0) {
          throw new Error("Duplicate message ID (".concat(id, ")"));
        }
      }

      return this.maxIncoming = id;
    }
    /**
     * Generate outgoing message ID
     * @returns Long
     */

  }, {
    key: "generate",
    value: function generate() {
      var id = new _long["default"](0, Date.now() / 1000);

      if (id.compare(this.maxOutgoing) <= 0) {
        id = this.maxOutgoing.add(_long["default"].FOUR);
      }

      return this.maxOutgoing = id;
    }
  }]);
  return MessageIdHandler;
}();

var _default = MessageIdHandler;
exports["default"] = _default;