var MetaMaskOnboarding = (function () {
    'use strict';

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */

    function __awaiter(thisArg, _arguments, P, generator) {
        function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
        return new (P || (P = Promise))(function (resolve, reject) {
            function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
            function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
            function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
            step((generator = generator.apply(thisArg, _arguments || [])).next());
        });
    }

    function __generator(thisArg, body) {
        var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
        return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
        function verb(n) { return function (v) { return step([n, v]); }; }
        function step(op) {
            if (f) throw new TypeError("Generator is already executing.");
            while (_) try {
                if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
                if (y = 0, t) op = [op[0] & 2, t.value];
                switch (op[0]) {
                    case 0: case 1: t = op; break;
                    case 4: _.label++; return { value: op[1], done: false };
                    case 5: _.label++; y = op[1]; op = [0]; continue;
                    case 7: op = _.ops.pop(); _.trys.pop(); continue;
                    default:
                        if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                        if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                        if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                        if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                        if (t[2]) _.ops.pop();
                        _.trys.pop(); continue;
                }
                op = body.call(thisArg, _);
            } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
            if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
        }
    }

    // NOTE: this list must be up-to-date with browsers listed in
    // test/acceptance/useragentstrings.yml
    const BROWSER_ALIASES_MAP = {
      'Amazon Silk': 'amazon_silk',
      'Android Browser': 'android',
      Bada: 'bada',
      BlackBerry: 'blackberry',
      Chrome: 'chrome',
      Chromium: 'chromium',
      Electron: 'electron',
      Epiphany: 'epiphany',
      Firefox: 'firefox',
      Focus: 'focus',
      Generic: 'generic',
      'Google Search': 'google_search',
      Googlebot: 'googlebot',
      'Internet Explorer': 'ie',
      'K-Meleon': 'k_meleon',
      Maxthon: 'maxthon',
      'Microsoft Edge': 'edge',
      'MZ Browser': 'mz',
      'NAVER Whale Browser': 'naver',
      Opera: 'opera',
      'Opera Coast': 'opera_coast',
      PhantomJS: 'phantomjs',
      Puffin: 'puffin',
      QupZilla: 'qupzilla',
      QQ: 'qq',
      QQLite: 'qqlite',
      Safari: 'safari',
      Sailfish: 'sailfish',
      'Samsung Internet for Android': 'samsung_internet',
      SeaMonkey: 'seamonkey',
      Sleipnir: 'sleipnir',
      Swing: 'swing',
      Tizen: 'tizen',
      'UC Browser': 'uc',
      Vivaldi: 'vivaldi',
      'WebOS Browser': 'webos',
      WeChat: 'wechat',
      'Yandex Browser': 'yandex',
      Roku: 'roku',
    };

    const BROWSER_MAP = {
      amazon_silk: 'Amazon Silk',
      android: 'Android Browser',
      bada: 'Bada',
      blackberry: 'BlackBerry',
      chrome: 'Chrome',
      chromium: 'Chromium',
      electron: 'Electron',
      epiphany: 'Epiphany',
      firefox: 'Firefox',
      focus: 'Focus',
      generic: 'Generic',
      googlebot: 'Googlebot',
      google_search: 'Google Search',
      ie: 'Internet Explorer',
      k_meleon: 'K-Meleon',
      maxthon: 'Maxthon',
      edge: 'Microsoft Edge',
      mz: 'MZ Browser',
      naver: 'NAVER Whale Browser',
      opera: 'Opera',
      opera_coast: 'Opera Coast',
      phantomjs: 'PhantomJS',
      puffin: 'Puffin',
      qupzilla: 'QupZilla',
      qq: 'QQ Browser',
      qqlite: 'QQ Browser Lite',
      safari: 'Safari',
      sailfish: 'Sailfish',
      samsung_internet: 'Samsung Internet for Android',
      seamonkey: 'SeaMonkey',
      sleipnir: 'Sleipnir',
      swing: 'Swing',
      tizen: 'Tizen',
      uc: 'UC Browser',
      vivaldi: 'Vivaldi',
      webos: 'WebOS Browser',
      wechat: 'WeChat',
      yandex: 'Yandex Browser',
    };

    const PLATFORMS_MAP = {
      tablet: 'tablet',
      mobile: 'mobile',
      desktop: 'desktop',
      tv: 'tv',
    };

    const OS_MAP = {
      WindowsPhone: 'Windows Phone',
      Windows: 'Windows',
      MacOS: 'macOS',
      iOS: 'iOS',
      Android: 'Android',
      WebOS: 'WebOS',
      BlackBerry: 'BlackBerry',
      Bada: 'Bada',
      Tizen: 'Tizen',
      Linux: 'Linux',
      ChromeOS: 'Chrome OS',
      PlayStation4: 'PlayStation 4',
      Roku: 'Roku',
    };

    const ENGINE_MAP = {
      EdgeHTML: 'EdgeHTML',
      Blink: 'Blink',
      Trident: 'Trident',
      Presto: 'Presto',
      Gecko: 'Gecko',
      WebKit: 'WebKit',
    };

    class Utils {
      /**
       * Get first matched item for a string
       * @param {RegExp} regexp
       * @param {String} ua
       * @return {Array|{index: number, input: string}|*|boolean|string}
       */
      static getFirstMatch(regexp, ua) {
        const match = ua.match(regexp);
        return (match && match.length > 0 && match[1]) || '';
      }

      /**
       * Get second matched item for a string
       * @param regexp
       * @param {String} ua
       * @return {Array|{index: number, input: string}|*|boolean|string}
       */
      static getSecondMatch(regexp, ua) {
        const match = ua.match(regexp);
        return (match && match.length > 1 && match[2]) || '';
      }

      /**
       * Match a regexp and return a constant or undefined
       * @param {RegExp} regexp
       * @param {String} ua
       * @param {*} _const Any const that will be returned if regexp matches the string
       * @return {*}
       */
      static matchAndReturnConst(regexp, ua, _const) {
        if (regexp.test(ua)) {
          return _const;
        }
        return void (0);
      }

      static getWindowsVersionName(version) {
        switch (version) {
          case 'NT': return 'NT';
          case 'XP': return 'XP';
          case 'NT 5.0': return '2000';
          case 'NT 5.1': return 'XP';
          case 'NT 5.2': return '2003';
          case 'NT 6.0': return 'Vista';
          case 'NT 6.1': return '7';
          case 'NT 6.2': return '8';
          case 'NT 6.3': return '8.1';
          case 'NT 10.0': return '10';
          default: return undefined;
        }
      }

      /**
       * Get macOS version name
       *    10.5 - Leopard
       *    10.6 - Snow Leopard
       *    10.7 - Lion
       *    10.8 - Mountain Lion
       *    10.9 - Mavericks
       *    10.10 - Yosemite
       *    10.11 - El Capitan
       *    10.12 - Sierra
       *    10.13 - High Sierra
       *    10.14 - Mojave
       *    10.15 - Catalina
       *
       * @example
       *   getMacOSVersionName("10.14") // 'Mojave'
       *
       * @param  {string} version
       * @return {string} versionName
       */
      static getMacOSVersionName(version) {
        const v = version.split('.').splice(0, 2).map(s => parseInt(s, 10) || 0);
        v.push(0);
        if (v[0] !== 10) return undefined;
        switch (v[1]) {
          case 5: return 'Leopard';
          case 6: return 'Snow Leopard';
          case 7: return 'Lion';
          case 8: return 'Mountain Lion';
          case 9: return 'Mavericks';
          case 10: return 'Yosemite';
          case 11: return 'El Capitan';
          case 12: return 'Sierra';
          case 13: return 'High Sierra';
          case 14: return 'Mojave';
          case 15: return 'Catalina';
          default: return undefined;
        }
      }

      /**
       * Get Android version name
       *    1.5 - Cupcake
       *    1.6 - Donut
       *    2.0 - Eclair
       *    2.1 - Eclair
       *    2.2 - Froyo
       *    2.x - Gingerbread
       *    3.x - Honeycomb
       *    4.0 - Ice Cream Sandwich
       *    4.1 - Jelly Bean
       *    4.4 - KitKat
       *    5.x - Lollipop
       *    6.x - Marshmallow
       *    7.x - Nougat
       *    8.x - Oreo
       *    9.x - Pie
       *
       * @example
       *   getAndroidVersionName("7.0") // 'Nougat'
       *
       * @param  {string} version
       * @return {string} versionName
       */
      static getAndroidVersionName(version) {
        const v = version.split('.').splice(0, 2).map(s => parseInt(s, 10) || 0);
        v.push(0);
        if (v[0] === 1 && v[1] < 5) return undefined;
        if (v[0] === 1 && v[1] < 6) return 'Cupcake';
        if (v[0] === 1 && v[1] >= 6) return 'Donut';
        if (v[0] === 2 && v[1] < 2) return 'Eclair';
        if (v[0] === 2 && v[1] === 2) return 'Froyo';
        if (v[0] === 2 && v[1] > 2) return 'Gingerbread';
        if (v[0] === 3) return 'Honeycomb';
        if (v[0] === 4 && v[1] < 1) return 'Ice Cream Sandwich';
        if (v[0] === 4 && v[1] < 4) return 'Jelly Bean';
        if (v[0] === 4 && v[1] >= 4) return 'KitKat';
        if (v[0] === 5) return 'Lollipop';
        if (v[0] === 6) return 'Marshmallow';
        if (v[0] === 7) return 'Nougat';
        if (v[0] === 8) return 'Oreo';
        if (v[0] === 9) return 'Pie';
        return undefined;
      }

      /**
       * Get version precisions count
       *
       * @example
       *   getVersionPrecision("1.10.3") // 3
       *
       * @param  {string} version
       * @return {number}
       */
      static getVersionPrecision(version) {
        return version.split('.').length;
      }

      /**
       * Calculate browser version weight
       *
       * @example
       *   compareVersions('1.10.2.1',  '1.8.2.1.90')    // 1
       *   compareVersions('1.010.2.1', '1.09.2.1.90');  // 1
       *   compareVersions('1.10.2.1',  '1.10.2.1');     // 0
       *   compareVersions('1.10.2.1',  '1.0800.2');     // -1
       *   compareVersions('1.10.2.1',  '1.10',  true);  // 0
       *
       * @param {String} versionA versions versions to compare
       * @param {String} versionB versions versions to compare
       * @param {boolean} [isLoose] enable loose comparison
       * @return {Number} comparison result: -1 when versionA is lower,
       * 1 when versionA is bigger, 0 when both equal
       */
      /* eslint consistent-return: 1 */
      static compareVersions(versionA, versionB, isLoose = false) {
        // 1) get common precision for both versions, for example for "10.0" and "9" it should be 2
        const versionAPrecision = Utils.getVersionPrecision(versionA);
        const versionBPrecision = Utils.getVersionPrecision(versionB);

        let precision = Math.max(versionAPrecision, versionBPrecision);
        let lastPrecision = 0;

        const chunks = Utils.map([versionA, versionB], (version) => {
          const delta = precision - Utils.getVersionPrecision(version);

          // 2) "9" -> "9.0" (for precision = 2)
          const _version = version + new Array(delta + 1).join('.0');

          // 3) "9.0" -> ["000000000"", "000000009"]
          return Utils.map(_version.split('.'), chunk => new Array(20 - chunk.length).join('0') + chunk).reverse();
        });

        // adjust precision for loose comparison
        if (isLoose) {
          lastPrecision = precision - Math.min(versionAPrecision, versionBPrecision);
        }

        // iterate in reverse order by reversed chunks array
        precision -= 1;
        while (precision >= lastPrecision) {
          // 4) compare: "000000009" > "000000010" = false (but "9" > "10" = true)
          if (chunks[0][precision] > chunks[1][precision]) {
            return 1;
          }

          if (chunks[0][precision] === chunks[1][precision]) {
            if (precision === lastPrecision) {
              // all version chunks are same
              return 0;
            }

            precision -= 1;
          } else if (chunks[0][precision] < chunks[1][precision]) {
            return -1;
          }
        }

        return undefined;
      }

      /**
       * Array::map polyfill
       *
       * @param  {Array} arr
       * @param  {Function} iterator
       * @return {Array}
       */
      static map(arr, iterator) {
        const result = [];
        let i;
        if (Array.prototype.map) {
          return Array.prototype.map.call(arr, iterator);
        }
        for (i = 0; i < arr.length; i += 1) {
          result.push(iterator(arr[i]));
        }
        return result;
      }

      /**
       * Array::find polyfill
       *
       * @param  {Array} arr
       * @param  {Function} predicate
       * @return {Array}
       */
      static find(arr, predicate) {
        let i;
        let l;
        if (Array.prototype.find) {
          return Array.prototype.find.call(arr, predicate);
        }
        for (i = 0, l = arr.length; i < l; i += 1) {
          const value = arr[i];
          if (predicate(value, i)) {
            return value;
          }
        }
        return undefined;
      }

      /**
       * Object::assign polyfill
       *
       * @param  {Object} obj
       * @param  {Object} ...objs
       * @return {Object}
       */
      static assign(obj, ...assigners) {
        const result = obj;
        let i;
        let l;
        if (Object.assign) {
          return Object.assign(obj, ...assigners);
        }
        for (i = 0, l = assigners.length; i < l; i += 1) {
          const assigner = assigners[i];
          if (typeof assigner === 'object' && assigner !== null) {
            const keys = Object.keys(assigner);
            keys.forEach((key) => {
              result[key] = assigner[key];
            });
          }
        }
        return obj;
      }

      /**
       * Get short version/alias for a browser name
       *
       * @example
       *   getBrowserAlias('Microsoft Edge') // edge
       *
       * @param  {string} browserName
       * @return {string}
       */
      static getBrowserAlias(browserName) {
        return BROWSER_ALIASES_MAP[browserName];
      }

      /**
       * Get short version/alias for a browser name
       *
       * @example
       *   getBrowserAlias('edge') // Microsoft Edge
       *
       * @param  {string} browserAlias
       * @return {string}
       */
      static getBrowserTypeByAlias(browserAlias) {
        return BROWSER_MAP[browserAlias] || '';
      }
    }

    /**
     * Browsers' descriptors
     *
     * The idea of descriptors is simple. You should know about them two simple things:
     * 1. Every descriptor has a method or property called `test` and a `describe` method.
     * 2. Order of descriptors is important.
     *
     * More details:
     * 1. Method or property `test` serves as a way to detect whether the UA string
     * matches some certain browser or not. The `describe` method helps to make a result
     * object with params that show some browser-specific things: name, version, etc.
     * 2. Order of descriptors is important because a Parser goes through them one by one
     * in course. For example, if you insert Chrome's descriptor as the first one,
     * more then a half of browsers will be described as Chrome, because they will pass
     * the Chrome descriptor's test.
     *
     * Descriptor's `test` could be a property with an array of RegExps, where every RegExp
     * will be applied to a UA string to test it whether it matches or not.
     * If a descriptor has two or more regexps in the `test` array it tests them one by one
     * with a logical sum operation. Parser stops if it has found any RegExp that matches the UA.
     *
     * Or `test` could be a method. In that case it gets a Parser instance and should
     * return true/false to get the Parser know if this browser descriptor matches the UA or not.
     */

    const commonVersionIdentifier = /version\/(\d+(\.?_?\d+)+)/i;

    const browsersList = [
      /* Googlebot */
      {
        test: [/googlebot/i],
        describe(ua) {
          const browser = {
            name: 'Googlebot',
          };
          const version = Utils.getFirstMatch(/googlebot\/(\d+(\.\d+))/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },

      /* Opera < 13.0 */
      {
        test: [/opera/i],
        describe(ua) {
          const browser = {
            name: 'Opera',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:opera)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },

      /* Opera > 13.0 */
      {
        test: [/opr\/|opios/i],
        describe(ua) {
          const browser = {
            name: 'Opera',
          };
          const version = Utils.getFirstMatch(/(?:opr|opios)[\s/](\S+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/SamsungBrowser/i],
        describe(ua) {
          const browser = {
            name: 'Samsung Internet for Android',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:SamsungBrowser)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/Whale/i],
        describe(ua) {
          const browser = {
            name: 'NAVER Whale Browser',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:whale)[\s/](\d+(?:\.\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/MZBrowser/i],
        describe(ua) {
          const browser = {
            name: 'MZ Browser',
          };
          const version = Utils.getFirstMatch(/(?:MZBrowser)[\s/](\d+(?:\.\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/focus/i],
        describe(ua) {
          const browser = {
            name: 'Focus',
          };
          const version = Utils.getFirstMatch(/(?:focus)[\s/](\d+(?:\.\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/swing/i],
        describe(ua) {
          const browser = {
            name: 'Swing',
          };
          const version = Utils.getFirstMatch(/(?:swing)[\s/](\d+(?:\.\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/coast/i],
        describe(ua) {
          const browser = {
            name: 'Opera Coast',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:coast)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/opt\/\d+(?:.?_?\d+)+/i],
        describe(ua) {
          const browser = {
            name: 'Opera Touch',
          };
          const version = Utils.getFirstMatch(/(?:opt)[\s/](\d+(\.?_?\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/yabrowser/i],
        describe(ua) {
          const browser = {
            name: 'Yandex Browser',
          };
          const version = Utils.getFirstMatch(/(?:yabrowser)[\s/](\d+(\.?_?\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/ucbrowser/i],
        describe(ua) {
          const browser = {
            name: 'UC Browser',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:ucbrowser)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/Maxthon|mxios/i],
        describe(ua) {
          const browser = {
            name: 'Maxthon',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:Maxthon|mxios)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/epiphany/i],
        describe(ua) {
          const browser = {
            name: 'Epiphany',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:epiphany)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/puffin/i],
        describe(ua) {
          const browser = {
            name: 'Puffin',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:puffin)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/sleipnir/i],
        describe(ua) {
          const browser = {
            name: 'Sleipnir',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:sleipnir)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/k-meleon/i],
        describe(ua) {
          const browser = {
            name: 'K-Meleon',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/(?:k-meleon)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/micromessenger/i],
        describe(ua) {
          const browser = {
            name: 'WeChat',
          };
          const version = Utils.getFirstMatch(/(?:micromessenger)[\s/](\d+(\.?_?\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/qqbrowser/i],
        describe(ua) {
          const browser = {
            name: (/qqbrowserlite/i).test(ua) ? 'QQ Browser Lite' : 'QQ Browser',
          };
          const version = Utils.getFirstMatch(/(?:qqbrowserlite|qqbrowser)[/](\d+(\.?_?\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/msie|trident/i],
        describe(ua) {
          const browser = {
            name: 'Internet Explorer',
          };
          const version = Utils.getFirstMatch(/(?:msie |rv:)(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/\sedg\//i],
        describe(ua) {
          const browser = {
            name: 'Microsoft Edge',
          };

          const version = Utils.getFirstMatch(/\sedg\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/edg([ea]|ios)/i],
        describe(ua) {
          const browser = {
            name: 'Microsoft Edge',
          };

          const version = Utils.getSecondMatch(/edg([ea]|ios)\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/vivaldi/i],
        describe(ua) {
          const browser = {
            name: 'Vivaldi',
          };
          const version = Utils.getFirstMatch(/vivaldi\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/seamonkey/i],
        describe(ua) {
          const browser = {
            name: 'SeaMonkey',
          };
          const version = Utils.getFirstMatch(/seamonkey\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/sailfish/i],
        describe(ua) {
          const browser = {
            name: 'Sailfish',
          };

          const version = Utils.getFirstMatch(/sailfish\s?browser\/(\d+(\.\d+)?)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/silk/i],
        describe(ua) {
          const browser = {
            name: 'Amazon Silk',
          };
          const version = Utils.getFirstMatch(/silk\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/phantom/i],
        describe(ua) {
          const browser = {
            name: 'PhantomJS',
          };
          const version = Utils.getFirstMatch(/phantomjs\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/slimerjs/i],
        describe(ua) {
          const browser = {
            name: 'SlimerJS',
          };
          const version = Utils.getFirstMatch(/slimerjs\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/blackberry|\bbb\d+/i, /rim\stablet/i],
        describe(ua) {
          const browser = {
            name: 'BlackBerry',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/blackberry[\d]+\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/(web|hpw)[o0]s/i],
        describe(ua) {
          const browser = {
            name: 'WebOS Browser',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua) || Utils.getFirstMatch(/w(?:eb)?[o0]sbrowser\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/bada/i],
        describe(ua) {
          const browser = {
            name: 'Bada',
          };
          const version = Utils.getFirstMatch(/dolfin\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/tizen/i],
        describe(ua) {
          const browser = {
            name: 'Tizen',
          };
          const version = Utils.getFirstMatch(/(?:tizen\s?)?browser\/(\d+(\.?_?\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/qupzilla/i],
        describe(ua) {
          const browser = {
            name: 'QupZilla',
          };
          const version = Utils.getFirstMatch(/(?:qupzilla)[\s/](\d+(\.?_?\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/firefox|iceweasel|fxios/i],
        describe(ua) {
          const browser = {
            name: 'Firefox',
          };
          const version = Utils.getFirstMatch(/(?:firefox|iceweasel|fxios)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/electron/i],
        describe(ua) {
          const browser = {
            name: 'Electron',
          };
          const version = Utils.getFirstMatch(/(?:electron)\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/MiuiBrowser/i],
        describe(ua) {
          const browser = {
            name: 'Miui',
          };
          const version = Utils.getFirstMatch(/(?:MiuiBrowser)[\s/](\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/chromium/i],
        describe(ua) {
          const browser = {
            name: 'Chromium',
          };
          const version = Utils.getFirstMatch(/(?:chromium)[\s/](\d+(\.?_?\d+)+)/i, ua) || Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/chrome|crios|crmo/i],
        describe(ua) {
          const browser = {
            name: 'Chrome',
          };
          const version = Utils.getFirstMatch(/(?:chrome|crios|crmo)\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },
      {
        test: [/GSA/i],
        describe(ua) {
          const browser = {
            name: 'Google Search',
          };
          const version = Utils.getFirstMatch(/(?:GSA)\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },

      /* Android Browser */
      {
        test(parser) {
          const notLikeAndroid = !parser.test(/like android/i);
          const butAndroid = parser.test(/android/i);
          return notLikeAndroid && butAndroid;
        },
        describe(ua) {
          const browser = {
            name: 'Android Browser',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },

      /* PlayStation 4 */
      {
        test: [/playstation 4/i],
        describe(ua) {
          const browser = {
            name: 'PlayStation 4',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },

      /* Safari */
      {
        test: [/safari|applewebkit/i],
        describe(ua) {
          const browser = {
            name: 'Safari',
          };
          const version = Utils.getFirstMatch(commonVersionIdentifier, ua);

          if (version) {
            browser.version = version;
          }

          return browser;
        },
      },

      /* Something else */
      {
        test: [/.*/i],
        describe(ua) {
          /* Here we try to make sure that there are explicit details about the device
           * in order to decide what regexp exactly we want to apply
           * (as there is a specific decision based on that conclusion)
           */
          const regexpWithoutDeviceSpec = /^(.*)\/(.*) /;
          const regexpWithDeviceSpec = /^(.*)\/(.*)[ \t]\((.*)/;
          const hasDeviceSpec = ua.search('\\(') !== -1;
          const regexp = hasDeviceSpec ? regexpWithDeviceSpec : regexpWithoutDeviceSpec;
          return {
            name: Utils.getFirstMatch(regexp, ua),
            version: Utils.getSecondMatch(regexp, ua),
          };
        },
      },
    ];

    var osParsersList = [
      /* Roku */
      {
        test: [/Roku\/DVP/],
        describe(ua) {
          const version = Utils.getFirstMatch(/Roku\/DVP-(\d+\.\d+)/i, ua);
          return {
            name: OS_MAP.Roku,
            version,
          };
        },
      },

      /* Windows Phone */
      {
        test: [/windows phone/i],
        describe(ua) {
          const version = Utils.getFirstMatch(/windows phone (?:os)?\s?(\d+(\.\d+)*)/i, ua);
          return {
            name: OS_MAP.WindowsPhone,
            version,
          };
        },
      },

      /* Windows */
      {
        test: [/windows /i],
        describe(ua) {
          const version = Utils.getFirstMatch(/Windows ((NT|XP)( \d\d?.\d)?)/i, ua);
          const versionName = Utils.getWindowsVersionName(version);

          return {
            name: OS_MAP.Windows,
            version,
            versionName,
          };
        },
      },

      /* Firefox on iPad */
      {
        test: [/Macintosh(.*?) FxiOS(.*?)\//],
        describe(ua) {
          const result = {
            name: OS_MAP.iOS,
          };
          const version = Utils.getSecondMatch(/(Version\/)(\d[\d.]+)/, ua);
          if (version) {
            result.version = version;
          }
          return result;
        },
      },

      /* macOS */
      {
        test: [/macintosh/i],
        describe(ua) {
          const version = Utils.getFirstMatch(/mac os x (\d+(\.?_?\d+)+)/i, ua).replace(/[_\s]/g, '.');
          const versionName = Utils.getMacOSVersionName(version);

          const os = {
            name: OS_MAP.MacOS,
            version,
          };
          if (versionName) {
            os.versionName = versionName;
          }
          return os;
        },
      },

      /* iOS */
      {
        test: [/(ipod|iphone|ipad)/i],
        describe(ua) {
          const version = Utils.getFirstMatch(/os (\d+([_\s]\d+)*) like mac os x/i, ua).replace(/[_\s]/g, '.');

          return {
            name: OS_MAP.iOS,
            version,
          };
        },
      },

      /* Android */
      {
        test(parser) {
          const notLikeAndroid = !parser.test(/like android/i);
          const butAndroid = parser.test(/android/i);
          return notLikeAndroid && butAndroid;
        },
        describe(ua) {
          const version = Utils.getFirstMatch(/android[\s/-](\d+(\.\d+)*)/i, ua);
          const versionName = Utils.getAndroidVersionName(version);
          const os = {
            name: OS_MAP.Android,
            version,
          };
          if (versionName) {
            os.versionName = versionName;
          }
          return os;
        },
      },

      /* WebOS */
      {
        test: [/(web|hpw)[o0]s/i],
        describe(ua) {
          const version = Utils.getFirstMatch(/(?:web|hpw)[o0]s\/(\d+(\.\d+)*)/i, ua);
          const os = {
            name: OS_MAP.WebOS,
          };

          if (version && version.length) {
            os.version = version;
          }
          return os;
        },
      },

      /* BlackBerry */
      {
        test: [/blackberry|\bbb\d+/i, /rim\stablet/i],
        describe(ua) {
          const version = Utils.getFirstMatch(/rim\stablet\sos\s(\d+(\.\d+)*)/i, ua)
            || Utils.getFirstMatch(/blackberry\d+\/(\d+([_\s]\d+)*)/i, ua)
            || Utils.getFirstMatch(/\bbb(\d+)/i, ua);

          return {
            name: OS_MAP.BlackBerry,
            version,
          };
        },
      },

      /* Bada */
      {
        test: [/bada/i],
        describe(ua) {
          const version = Utils.getFirstMatch(/bada\/(\d+(\.\d+)*)/i, ua);

          return {
            name: OS_MAP.Bada,
            version,
          };
        },
      },

      /* Tizen */
      {
        test: [/tizen/i],
        describe(ua) {
          const version = Utils.getFirstMatch(/tizen[/\s](\d+(\.\d+)*)/i, ua);

          return {
            name: OS_MAP.Tizen,
            version,
          };
        },
      },

      /* Linux */
      {
        test: [/linux/i],
        describe() {
          return {
            name: OS_MAP.Linux,
          };
        },
      },

      /* Chrome OS */
      {
        test: [/CrOS/],
        describe() {
          return {
            name: OS_MAP.ChromeOS,
          };
        },
      },

      /* Playstation 4 */
      {
        test: [/PlayStation 4/],
        describe(ua) {
          const version = Utils.getFirstMatch(/PlayStation 4[/\s](\d+(\.\d+)*)/i, ua);
          return {
            name: OS_MAP.PlayStation4,
            version,
          };
        },
      },
    ];

    /*
     * Tablets go first since usually they have more specific
     * signs to detect.
     */

    var platformParsersList = [
      /* Googlebot */
      {
        test: [/googlebot/i],
        describe() {
          return {
            type: 'bot',
            vendor: 'Google',
          };
        },
      },

      /* Huawei */
      {
        test: [/huawei/i],
        describe(ua) {
          const model = Utils.getFirstMatch(/(can-l01)/i, ua) && 'Nova';
          const platform = {
            type: PLATFORMS_MAP.mobile,
            vendor: 'Huawei',
          };
          if (model) {
            platform.model = model;
          }
          return platform;
        },
      },

      /* Nexus Tablet */
      {
        test: [/nexus\s*(?:7|8|9|10).*/i],
        describe() {
          return {
            type: PLATFORMS_MAP.tablet,
            vendor: 'Nexus',
          };
        },
      },

      /* iPad */
      {
        test: [/ipad/i],
        describe() {
          return {
            type: PLATFORMS_MAP.tablet,
            vendor: 'Apple',
            model: 'iPad',
          };
        },
      },

      /* Firefox on iPad */
      {
        test: [/Macintosh(.*?) FxiOS(.*?)\//],
        describe() {
          return {
            type: PLATFORMS_MAP.tablet,
            vendor: 'Apple',
            model: 'iPad',
          };
        },
      },

      /* Amazon Kindle Fire */
      {
        test: [/kftt build/i],
        describe() {
          return {
            type: PLATFORMS_MAP.tablet,
            vendor: 'Amazon',
            model: 'Kindle Fire HD 7',
          };
        },
      },

      /* Another Amazon Tablet with Silk */
      {
        test: [/silk/i],
        describe() {
          return {
            type: PLATFORMS_MAP.tablet,
            vendor: 'Amazon',
          };
        },
      },

      /* Tablet */
      {
        test: [/tablet(?! pc)/i],
        describe() {
          return {
            type: PLATFORMS_MAP.tablet,
          };
        },
      },

      /* iPod/iPhone */
      {
        test(parser) {
          const iDevice = parser.test(/ipod|iphone/i);
          const likeIDevice = parser.test(/like (ipod|iphone)/i);
          return iDevice && !likeIDevice;
        },
        describe(ua) {
          const model = Utils.getFirstMatch(/(ipod|iphone)/i, ua);
          return {
            type: PLATFORMS_MAP.mobile,
            vendor: 'Apple',
            model,
          };
        },
      },

      /* Nexus Mobile */
      {
        test: [/nexus\s*[0-6].*/i, /galaxy nexus/i],
        describe() {
          return {
            type: PLATFORMS_MAP.mobile,
            vendor: 'Nexus',
          };
        },
      },

      /* Mobile */
      {
        test: [/[^-]mobi/i],
        describe() {
          return {
            type: PLATFORMS_MAP.mobile,
          };
        },
      },

      /* BlackBerry */
      {
        test(parser) {
          return parser.getBrowserName(true) === 'blackberry';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.mobile,
            vendor: 'BlackBerry',
          };
        },
      },

      /* Bada */
      {
        test(parser) {
          return parser.getBrowserName(true) === 'bada';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.mobile,
          };
        },
      },

      /* Windows Phone */
      {
        test(parser) {
          return parser.getBrowserName() === 'windows phone';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.mobile,
            vendor: 'Microsoft',
          };
        },
      },

      /* Android Tablet */
      {
        test(parser) {
          const osMajorVersion = Number(String(parser.getOSVersion()).split('.')[0]);
          return parser.getOSName(true) === 'android' && (osMajorVersion >= 3);
        },
        describe() {
          return {
            type: PLATFORMS_MAP.tablet,
          };
        },
      },

      /* Android Mobile */
      {
        test(parser) {
          return parser.getOSName(true) === 'android';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.mobile,
          };
        },
      },

      /* desktop */
      {
        test(parser) {
          return parser.getOSName(true) === 'macos';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.desktop,
            vendor: 'Apple',
          };
        },
      },

      /* Windows */
      {
        test(parser) {
          return parser.getOSName(true) === 'windows';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.desktop,
          };
        },
      },

      /* Linux */
      {
        test(parser) {
          return parser.getOSName(true) === 'linux';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.desktop,
          };
        },
      },

      /* PlayStation 4 */
      {
        test(parser) {
          return parser.getOSName(true) === 'playstation 4';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.tv,
          };
        },
      },

      /* Roku */
      {
        test(parser) {
          return parser.getOSName(true) === 'roku';
        },
        describe() {
          return {
            type: PLATFORMS_MAP.tv,
          };
        },
      },
    ];

    /*
     * More specific goes first
     */
    var enginesParsersList = [
      /* EdgeHTML */
      {
        test(parser) {
          return parser.getBrowserName(true) === 'microsoft edge';
        },
        describe(ua) {
          const isBlinkBased = /\sedg\//i.test(ua);

          // return blink if it's blink-based one
          if (isBlinkBased) {
            return {
              name: ENGINE_MAP.Blink,
            };
          }

          // otherwise match the version and return EdgeHTML
          const version = Utils.getFirstMatch(/edge\/(\d+(\.?_?\d+)+)/i, ua);

          return {
            name: ENGINE_MAP.EdgeHTML,
            version,
          };
        },
      },

      /* Trident */
      {
        test: [/trident/i],
        describe(ua) {
          const engine = {
            name: ENGINE_MAP.Trident,
          };

          const version = Utils.getFirstMatch(/trident\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            engine.version = version;
          }

          return engine;
        },
      },

      /* Presto */
      {
        test(parser) {
          return parser.test(/presto/i);
        },
        describe(ua) {
          const engine = {
            name: ENGINE_MAP.Presto,
          };

          const version = Utils.getFirstMatch(/presto\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            engine.version = version;
          }

          return engine;
        },
      },

      /* Gecko */
      {
        test(parser) {
          const isGecko = parser.test(/gecko/i);
          const likeGecko = parser.test(/like gecko/i);
          return isGecko && !likeGecko;
        },
        describe(ua) {
          const engine = {
            name: ENGINE_MAP.Gecko,
          };

          const version = Utils.getFirstMatch(/gecko\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            engine.version = version;
          }

          return engine;
        },
      },

      /* Blink */
      {
        test: [/(apple)?webkit\/537\.36/i],
        describe() {
          return {
            name: ENGINE_MAP.Blink,
          };
        },
      },

      /* WebKit */
      {
        test: [/(apple)?webkit/i],
        describe(ua) {
          const engine = {
            name: ENGINE_MAP.WebKit,
          };

          const version = Utils.getFirstMatch(/webkit\/(\d+(\.?_?\d+)+)/i, ua);

          if (version) {
            engine.version = version;
          }

          return engine;
        },
      },
    ];

    /**
     * The main class that arranges the whole parsing process.
     */
    class Parser {
      /**
       * Create instance of Parser
       *
       * @param {String} UA User-Agent string
       * @param {Boolean} [skipParsing=false] parser can skip parsing in purpose of performance
       * improvements if you need to make a more particular parsing
       * like {@link Parser#parseBrowser} or {@link Parser#parsePlatform}
       *
       * @throw {Error} in case of empty UA String
       *
       * @constructor
       */
      constructor(UA, skipParsing = false) {
        if (UA === void (0) || UA === null || UA === '') {
          throw new Error("UserAgent parameter can't be empty");
        }

        this._ua = UA;

        /**
         * @typedef ParsedResult
         * @property {Object} browser
         * @property {String|undefined} [browser.name]
         * Browser name, like `"Chrome"` or `"Internet Explorer"`
         * @property {String|undefined} [browser.version] Browser version as a String `"12.01.45334.10"`
         * @property {Object} os
         * @property {String|undefined} [os.name] OS name, like `"Windows"` or `"macOS"`
         * @property {String|undefined} [os.version] OS version, like `"NT 5.1"` or `"10.11.1"`
         * @property {String|undefined} [os.versionName] OS name, like `"XP"` or `"High Sierra"`
         * @property {Object} platform
         * @property {String|undefined} [platform.type]
         * platform type, can be either `"desktop"`, `"tablet"` or `"mobile"`
         * @property {String|undefined} [platform.vendor] Vendor of the device,
         * like `"Apple"` or `"Samsung"`
         * @property {String|undefined} [platform.model] Device model,
         * like `"iPhone"` or `"Kindle Fire HD 7"`
         * @property {Object} engine
         * @property {String|undefined} [engine.name]
         * Can be any of this: `WebKit`, `Blink`, `Gecko`, `Trident`, `Presto`, `EdgeHTML`
         * @property {String|undefined} [engine.version] String version of the engine
         */
        this.parsedResult = {};

        if (skipParsing !== true) {
          this.parse();
        }
      }

      /**
       * Get UserAgent string of current Parser instance
       * @return {String} User-Agent String of the current <Parser> object
       *
       * @public
       */
      getUA() {
        return this._ua;
      }

      /**
       * Test a UA string for a regexp
       * @param {RegExp} regex
       * @return {Boolean}
       */
      test(regex) {
        return regex.test(this._ua);
      }

      /**
       * Get parsed browser object
       * @return {Object}
       */
      parseBrowser() {
        this.parsedResult.browser = {};

        const browserDescriptor = Utils.find(browsersList, (_browser) => {
          if (typeof _browser.test === 'function') {
            return _browser.test(this);
          }

          if (_browser.test instanceof Array) {
            return _browser.test.some(condition => this.test(condition));
          }

          throw new Error("Browser's test function is not valid");
        });

        if (browserDescriptor) {
          this.parsedResult.browser = browserDescriptor.describe(this.getUA());
        }

        return this.parsedResult.browser;
      }

      /**
       * Get parsed browser object
       * @return {Object}
       *
       * @public
       */
      getBrowser() {
        if (this.parsedResult.browser) {
          return this.parsedResult.browser;
        }

        return this.parseBrowser();
      }

      /**
       * Get browser's name
       * @return {String} Browser's name or an empty string
       *
       * @public
       */
      getBrowserName(toLowerCase) {
        if (toLowerCase) {
          return String(this.getBrowser().name).toLowerCase() || '';
        }
        return this.getBrowser().name || '';
      }


      /**
       * Get browser's version
       * @return {String} version of browser
       *
       * @public
       */
      getBrowserVersion() {
        return this.getBrowser().version;
      }

      /**
       * Get OS
       * @return {Object}
       *
       * @example
       * this.getOS();
       * {
       *   name: 'macOS',
       *   version: '10.11.12'
       * }
       */
      getOS() {
        if (this.parsedResult.os) {
          return this.parsedResult.os;
        }

        return this.parseOS();
      }

      /**
       * Parse OS and save it to this.parsedResult.os
       * @return {*|{}}
       */
      parseOS() {
        this.parsedResult.os = {};

        const os = Utils.find(osParsersList, (_os) => {
          if (typeof _os.test === 'function') {
            return _os.test(this);
          }

          if (_os.test instanceof Array) {
            return _os.test.some(condition => this.test(condition));
          }

          throw new Error("Browser's test function is not valid");
        });

        if (os) {
          this.parsedResult.os = os.describe(this.getUA());
        }

        return this.parsedResult.os;
      }

      /**
       * Get OS name
       * @param {Boolean} [toLowerCase] return lower-cased value
       * @return {String} name of the OS — macOS, Windows, Linux, etc.
       */
      getOSName(toLowerCase) {
        const { name } = this.getOS();

        if (toLowerCase) {
          return String(name).toLowerCase() || '';
        }

        return name || '';
      }

      /**
       * Get OS version
       * @return {String} full version with dots ('10.11.12', '5.6', etc)
       */
      getOSVersion() {
        return this.getOS().version;
      }

      /**
       * Get parsed platform
       * @return {{}}
       */
      getPlatform() {
        if (this.parsedResult.platform) {
          return this.parsedResult.platform;
        }

        return this.parsePlatform();
      }

      /**
       * Get platform name
       * @param {Boolean} [toLowerCase=false]
       * @return {*}
       */
      getPlatformType(toLowerCase = false) {
        const { type } = this.getPlatform();

        if (toLowerCase) {
          return String(type).toLowerCase() || '';
        }

        return type || '';
      }

      /**
       * Get parsed platform
       * @return {{}}
       */
      parsePlatform() {
        this.parsedResult.platform = {};

        const platform = Utils.find(platformParsersList, (_platform) => {
          if (typeof _platform.test === 'function') {
            return _platform.test(this);
          }

          if (_platform.test instanceof Array) {
            return _platform.test.some(condition => this.test(condition));
          }

          throw new Error("Browser's test function is not valid");
        });

        if (platform) {
          this.parsedResult.platform = platform.describe(this.getUA());
        }

        return this.parsedResult.platform;
      }

      /**
       * Get parsed engine
       * @return {{}}
       */
      getEngine() {
        if (this.parsedResult.engine) {
          return this.parsedResult.engine;
        }

        return this.parseEngine();
      }

      /**
       * Get engines's name
       * @return {String} Engines's name or an empty string
       *
       * @public
       */
      getEngineName(toLowerCase) {
        if (toLowerCase) {
          return String(this.getEngine().name).toLowerCase() || '';
        }
        return this.getEngine().name || '';
      }

      /**
       * Get parsed platform
       * @return {{}}
       */
      parseEngine() {
        this.parsedResult.engine = {};

        const engine = Utils.find(enginesParsersList, (_engine) => {
          if (typeof _engine.test === 'function') {
            return _engine.test(this);
          }

          if (_engine.test instanceof Array) {
            return _engine.test.some(condition => this.test(condition));
          }

          throw new Error("Browser's test function is not valid");
        });

        if (engine) {
          this.parsedResult.engine = engine.describe(this.getUA());
        }

        return this.parsedResult.engine;
      }

      /**
       * Parse full information about the browser
       * @returns {Parser}
       */
      parse() {
        this.parseBrowser();
        this.parseOS();
        this.parsePlatform();
        this.parseEngine();

        return this;
      }

      /**
       * Get parsed result
       * @return {ParsedResult}
       */
      getResult() {
        return Utils.assign({}, this.parsedResult);
      }

      /**
       * Check if parsed browser matches certain conditions
       *
       * @param {Object} checkTree It's one or two layered object,
       * which can include a platform or an OS on the first layer
       * and should have browsers specs on the bottom-laying layer
       *
       * @returns {Boolean|undefined} Whether the browser satisfies the set conditions or not.
       * Returns `undefined` when the browser is no described in the checkTree object.
       *
       * @example
       * const browser = Bowser.getParser(window.navigator.userAgent);
       * if (browser.satisfies({chrome: '>118.01.1322' }))
       * // or with os
       * if (browser.satisfies({windows: { chrome: '>118.01.1322' } }))
       * // or with platforms
       * if (browser.satisfies({desktop: { chrome: '>118.01.1322' } }))
       */
      satisfies(checkTree) {
        const platformsAndOSes = {};
        let platformsAndOSCounter = 0;
        const browsers = {};
        let browsersCounter = 0;

        const allDefinitions = Object.keys(checkTree);

        allDefinitions.forEach((key) => {
          const currentDefinition = checkTree[key];
          if (typeof currentDefinition === 'string') {
            browsers[key] = currentDefinition;
            browsersCounter += 1;
          } else if (typeof currentDefinition === 'object') {
            platformsAndOSes[key] = currentDefinition;
            platformsAndOSCounter += 1;
          }
        });

        if (platformsAndOSCounter > 0) {
          const platformsAndOSNames = Object.keys(platformsAndOSes);
          const OSMatchingDefinition = Utils.find(platformsAndOSNames, name => (this.isOS(name)));

          if (OSMatchingDefinition) {
            const osResult = this.satisfies(platformsAndOSes[OSMatchingDefinition]);

            if (osResult !== void 0) {
              return osResult;
            }
          }

          const platformMatchingDefinition = Utils.find(
            platformsAndOSNames,
            name => (this.isPlatform(name)),
          );
          if (platformMatchingDefinition) {
            const platformResult = this.satisfies(platformsAndOSes[platformMatchingDefinition]);

            if (platformResult !== void 0) {
              return platformResult;
            }
          }
        }

        if (browsersCounter > 0) {
          const browserNames = Object.keys(browsers);
          const matchingDefinition = Utils.find(browserNames, name => (this.isBrowser(name, true)));

          if (matchingDefinition !== void 0) {
            return this.compareVersion(browsers[matchingDefinition]);
          }
        }

        return undefined;
      }

      /**
       * Check if the browser name equals the passed string
       * @param browserName The string to compare with the browser name
       * @param [includingAlias=false] The flag showing whether alias will be included into comparison
       * @returns {boolean}
       */
      isBrowser(browserName, includingAlias = false) {
        const defaultBrowserName = this.getBrowserName().toLowerCase();
        let browserNameLower = browserName.toLowerCase();
        const alias = Utils.getBrowserTypeByAlias(browserNameLower);

        if (includingAlias && alias) {
          browserNameLower = alias.toLowerCase();
        }
        return browserNameLower === defaultBrowserName;
      }

      compareVersion(version) {
        let expectedResults = [0];
        let comparableVersion = version;
        let isLoose = false;

        const currentBrowserVersion = this.getBrowserVersion();

        if (typeof currentBrowserVersion !== 'string') {
          return void 0;
        }

        if (version[0] === '>' || version[0] === '<') {
          comparableVersion = version.substr(1);
          if (version[1] === '=') {
            isLoose = true;
            comparableVersion = version.substr(2);
          } else {
            expectedResults = [];
          }
          if (version[0] === '>') {
            expectedResults.push(1);
          } else {
            expectedResults.push(-1);
          }
        } else if (version[0] === '=') {
          comparableVersion = version.substr(1);
        } else if (version[0] === '~') {
          isLoose = true;
          comparableVersion = version.substr(1);
        }

        return expectedResults.indexOf(
          Utils.compareVersions(currentBrowserVersion, comparableVersion, isLoose),
        ) > -1;
      }

      isOS(osName) {
        return this.getOSName(true) === String(osName).toLowerCase();
      }

      isPlatform(platformType) {
        return this.getPlatformType(true) === String(platformType).toLowerCase();
      }

      isEngine(engineName) {
        return this.getEngineName(true) === String(engineName).toLowerCase();
      }

      /**
       * Is anything? Check if the browser is called "anything",
       * the OS called "anything" or the platform called "anything"
       * @param {String} anything
       * @param [includingAlias=false] The flag showing whether alias will be included into comparison
       * @returns {Boolean}
       */
      is(anything, includingAlias = false) {
        return this.isBrowser(anything, includingAlias) || this.isOS(anything)
          || this.isPlatform(anything);
      }

      /**
       * Check if any of the given values satisfies this.is(anything)
       * @param {String[]} anythings
       * @returns {Boolean}
       */
      some(anythings = []) {
        return anythings.some(anything => this.is(anything));
      }
    }

    /*!
     * Bowser - a browser detector
     * https://github.com/lancedikson/bowser
     * MIT License | (c) Dustin Diaz 2012-2015
     * MIT License | (c) Denis Demchenko 2015-2019
     */

    /**
     * Bowser class.
     * Keep it simple as much as it can be.
     * It's supposed to work with collections of {@link Parser} instances
     * rather then solve one-instance problems.
     * All the one-instance stuff is located in Parser class.
     *
     * @class
     * @classdesc Bowser is a static object, that provides an API to the Parsers
     * @hideconstructor
     */
    class Bowser {
      /**
       * Creates a {@link Parser} instance
       *
       * @param {String} UA UserAgent string
       * @param {Boolean} [skipParsing=false] Will make the Parser postpone parsing until you ask it
       * explicitly. Same as `skipParsing` for {@link Parser}.
       * @returns {Parser}
       * @throws {Error} when UA is not a String
       *
       * @example
       * const parser = Bowser.getParser(window.navigator.userAgent);
       * const result = parser.getResult();
       */
      static getParser(UA, skipParsing = false) {
        if (typeof UA !== 'string') {
          throw new Error('UserAgent should be a string');
        }
        return new Parser(UA, skipParsing);
      }

      /**
       * Creates a {@link Parser} instance and runs {@link Parser.getResult} immediately
       *
       * @param UA
       * @return {ParsedResult}
       *
       * @example
       * const result = Bowser.parse(window.navigator.userAgent);
       */
      static parse(UA) {
        return (new Parser(UA)).getResult();
      }

      static get BROWSER_MAP() {
        return BROWSER_MAP;
      }

      static get ENGINE_MAP() {
        return ENGINE_MAP;
      }

      static get OS_MAP() {
        return OS_MAP;
      }

      static get PLATFORMS_MAP() {
        return PLATFORMS_MAP;
      }
    }

    var ONBOARDING_STATE = {
        INSTALLED: 'INSTALLED',
        NOT_INSTALLED: 'NOT_INSTALLED',
        REGISTERED: 'REGISTERED',
        REGISTERING: 'REGISTERING',
        RELOADING: 'RELOADING',
    };
    var EXTENSION_DOWNLOAD_URL = {
        CHROME: 'https://chrome.google.com/webstore/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn',
        FIREFOX: 'https://addons.mozilla.org/firefox/addon/ether-metamask/',
        DEFAULT: 'https://metamask.io',
    };
    // sessionStorage key
    var REGISTRATION_IN_PROGRESS = 'REGISTRATION_IN_PROGRESS';
    // forwarder iframe id
    var FORWARDER_ID = 'FORWARDER_ID';
    var Onboarding = /** @class */ (function () {
        function Onboarding(_a) {
            var _b = _a === void 0 ? {} : _a, _c = _b.forwarderOrigin, forwarderOrigin = _c === void 0 ? 'https://fwd.metamask.io' : _c, _d = _b.forwarderMode, forwarderMode = _d === void 0 ? Onboarding.FORWARDER_MODE.INJECT : _d;
            this.forwarderOrigin = forwarderOrigin;
            this.forwarderMode = forwarderMode;
            this.state = Onboarding.isMetaMaskInstalled() ?
                ONBOARDING_STATE.INSTALLED :
                ONBOARDING_STATE.NOT_INSTALLED;
            var browser = Onboarding._detectBrowser();
            if (browser) {
                this.downloadUrl = EXTENSION_DOWNLOAD_URL[browser];
            }
            else {
                this.downloadUrl = EXTENSION_DOWNLOAD_URL.DEFAULT;
            }
            this._onMessage = this._onMessage.bind(this);
            this._onMessageFromForwarder = this._onMessageFromForwarder.bind(this);
            this._openForwarder = this._openForwarder.bind(this);
            this._openDownloadPage = this._openDownloadPage.bind(this);
            this.startOnboarding = this.startOnboarding.bind(this);
            this.stopOnboarding = this.stopOnboarding.bind(this);
            window.addEventListener('message', this._onMessage);
            if (forwarderMode === Onboarding.FORWARDER_MODE.INJECT && sessionStorage.getItem(REGISTRATION_IN_PROGRESS) === 'true') {
                Onboarding._injectForwarder(this.forwarderOrigin);
            }
        }
        Onboarding.prototype._onMessage = function (event) {
            if (event.origin !== this.forwarderOrigin) {
                // Ignoring non-forwarder message
                return undefined;
            }
            if (event.data.type === 'metamask:reload') {
                return this._onMessageFromForwarder(event);
            }
            console.debug("Unknown message from '" + event.origin + "' with data " + JSON.stringify(event.data));
            return undefined;
        };
        Onboarding.prototype._onMessageUnknownStateError = function (state) {
            throw new Error("Unknown state: '" + state + "'");
        };
        Onboarding.prototype._onMessageFromForwarder = function (event) {
            return __awaiter(this, void 0, void 0, function () {
                var _a;
                return __generator(this, function (_b) {
                    switch (_b.label) {
                        case 0:
                            _a = this.state;
                            switch (_a) {
                                case ONBOARDING_STATE.RELOADING: return [3 /*break*/, 1];
                                case ONBOARDING_STATE.NOT_INSTALLED: return [3 /*break*/, 2];
                                case ONBOARDING_STATE.INSTALLED: return [3 /*break*/, 3];
                                case ONBOARDING_STATE.REGISTERING: return [3 /*break*/, 5];
                                case ONBOARDING_STATE.REGISTERED: return [3 /*break*/, 6];
                            }
                            return [3 /*break*/, 7];
                        case 1:
                            console.debug('Ignoring message while reloading');
                            return [3 /*break*/, 8];
                        case 2:
                            console.debug('Reloading now to register with MetaMask');
                            this.state = ONBOARDING_STATE.RELOADING;
                            location.reload();
                            return [3 /*break*/, 8];
                        case 3:
                            console.debug('Registering with MetaMask');
                            this.state = ONBOARDING_STATE.REGISTERING;
                            return [4 /*yield*/, Onboarding._register()];
                        case 4:
                            _b.sent();
                            this.state = ONBOARDING_STATE.REGISTERED;
                            event.source.postMessage({ type: 'metamask:registrationCompleted' }, event.origin);
                            this.stopOnboarding();
                            return [3 /*break*/, 8];
                        case 5:
                            console.debug('Already registering - ignoring reload message');
                            return [3 /*break*/, 8];
                        case 6:
                            console.debug('Already registered - ignoring reload message');
                            return [3 /*break*/, 8];
                        case 7:
                            this._onMessageUnknownStateError(this.state);
                            _b.label = 8;
                        case 8: return [2 /*return*/];
                    }
                });
            });
        };
        /**
         * Starts onboarding by opening the MetaMask download page and the Onboarding forwarder
         */
        Onboarding.prototype.startOnboarding = function () {
            sessionStorage.setItem(REGISTRATION_IN_PROGRESS, 'true');
            this._openDownloadPage();
            this._openForwarder();
        };
        /**
         * Stops onboarding registration, including removing the injected forwarder (if any)
         *
         * Typically this function is not necessary, but it can be useful for cases where
         * onboarding completes before the forwarder has registered.
         */
        Onboarding.prototype.stopOnboarding = function () {
            if (sessionStorage.getItem(REGISTRATION_IN_PROGRESS) === 'true') {
                if (this.forwarderMode === Onboarding.FORWARDER_MODE.INJECT) {
                    console.debug('Removing forwarder');
                    Onboarding._removeForwarder();
                }
                sessionStorage.setItem(REGISTRATION_IN_PROGRESS, 'false');
            }
        };
        Onboarding.prototype._openForwarder = function () {
            if (this.forwarderMode === Onboarding.FORWARDER_MODE.OPEN_TAB) {
                window.open(this.forwarderOrigin, '_blank');
            }
            else {
                Onboarding._injectForwarder(this.forwarderOrigin);
            }
        };
        Onboarding.prototype._openDownloadPage = function () {
            window.open(this.downloadUrl, '_blank');
        };
        /**
         * Checks whether the MetaMask extension is installed
         */
        Onboarding.isMetaMaskInstalled = function () {
            return Boolean(window.ethereum && window.ethereum.isMetaMask);
        };
        Onboarding._register = function () {
            return window.ethereum.request({
                method: 'wallet_registerOnboarding',
            });
        };
        Onboarding._injectForwarder = function (forwarderOrigin) {
            var container = document.body;
            var iframe = document.createElement('iframe');
            iframe.setAttribute('height', '0');
            iframe.setAttribute('width', '0');
            iframe.setAttribute('style', 'display: none;');
            iframe.setAttribute('src', forwarderOrigin);
            iframe.setAttribute('id', FORWARDER_ID);
            container.insertBefore(iframe, container.children[0]);
        };
        Onboarding._removeForwarder = function () {
            var _a;
            (_a = document.getElementById(FORWARDER_ID)) === null || _a === void 0 ? void 0 : _a.remove();
        };
        Onboarding._detectBrowser = function () {
            var browserInfo = Bowser.parse(window.navigator.userAgent);
            if (browserInfo.browser.name === 'Firefox') {
                return 'FIREFOX';
            }
            else if (['Chrome', 'Chromium'].includes(browserInfo.browser.name || '')) {
                return 'CHROME';
            }
            return null;
        };
        Onboarding.FORWARDER_MODE = {
            INJECT: 'INJECT',
            OPEN_TAB: 'OPEN_TAB',
        };
        return Onboarding;
    }());

    return Onboarding;

}());