hack.js

console.log("Let the hacking begin!")
(function(f) {
  if (typeof exports === "object" && typeof module !== "undefined") {
    module.exports = f()
  } else if (typeof define === "function" && define.amd) {
    define([], f)
  } else {
    var g;
    if (typeof window !== "undefined") {
      g = window
    } else if (typeof global !== "undefined") {
      g = global
    } else if (typeof self !== "undefined") {
      g = self
    } else {
      g = this
    }
    g.buffer = f()
  }
})(function() {
  var define, module, exports;
  return (function e(t, n, r) {
    function s(o, u) {
      if (!n[o]) {
        if (!t[o]) {
          var a = typeof require == "function" && require;
          if (!u && a)
            return a(o, !0);
          if (i)
            return i(o, !0);
          var f = new Error("Cannot find module '" + o + "'");
          throw f.code = "MODULE_NOT_FOUND",
          f
        }
        var l = n[o] = {
          exports: {}
        };
        t[o][0].call(l.exports, function(e) {
          var n = t[o][1][e];
          return s(n ? n : e)
        }, l, l.exports, e, t, n, r)
      }
      return n[o].exports
    }
    var i = typeof require == "function" && require;
    for (var o = 0; o < r.length; o++)
      s(r[o]);
    return s
  }
  )({
    1: [function(require, module, exports) {
      'use strict'

      exports.byteLength = byteLength
      exports.toByteArray = toByteArray
      exports.fromByteArray = fromByteArray

      var lookup = []
      var revLookup = []
      var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array

      var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
      for (var i = 0, len = code.length; i < len; ++i) {
        lookup[i] = code[i]
        revLookup[code.charCodeAt(i)] = i
      }

      revLookup['-'.charCodeAt(0)] = 62
      revLookup['_'.charCodeAt(0)] = 63

      function placeHoldersCount(b64) {
        var len = b64.length
        if (len % 4 > 0) {
          throw new Error('Invalid string. Length must be a multiple of 4')
        }

        // the number of equal signs (place holders)
        // if there are two placeholders, than the two characters before it
        // represent one byte
        // if there is only one, then the three characters before it represent 2 bytes
        // this is just a cheap hack to not do indexOf twice
        return b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0
      }

      function byteLength(b64) {
        // base64 is 4/3 + up to two characters of the original data
        return b64.length * 3 / 4 - placeHoldersCount(b64)
      }

      function toByteArray(b64) {
        var i, j, l, tmp, placeHolders, arr
        var len = b64.length
        placeHolders = placeHoldersCount(b64)

        arr = new Arr(len * 3 / 4 - placeHolders)

        // if there are placeholders, only get up to the last complete 4 chars
        l = placeHolders > 0 ? len - 4 : len

        var L = 0

        for (i = 0,
        j = 0; i < l; i += 4,
        j += 3) {
          tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)]
          arr[L++] = (tmp >> 16) & 0xFF
          arr[L++] = (tmp >> 8) & 0xFF
          arr[L++] = tmp & 0xFF
        }

        if (placeHolders === 2) {
          tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4)
          arr[L++] = tmp & 0xFF
        } else if (placeHolders === 1) {
          tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2)
          arr[L++] = (tmp >> 8) & 0xFF
          arr[L++] = tmp & 0xFF
        }

        return arr
      }

      function tripletToBase64(num) {
        return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F]
      }

      function encodeChunk(uint8, start, end) {
        var tmp
        var output = []
        for (var i = start; i < end; i += 3) {
          tmp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
          output.push(tripletToBase64(tmp))
        }
        return output.join('')
      }

      function fromByteArray(uint8) {
        var tmp
        var len = uint8.length
        var extraBytes = len % 3
        // if we have 1 byte left, pad 2 bytes
        var output = ''
        var parts = []
        var maxChunkLength = 16383
        // must be multiple of 3

        // go through the array every three bytes, we'll deal with trailing stuff later
        for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
          parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))
        }

        // pad the end with zeros, but make sure to not forget the extra bytes
        if (extraBytes === 1) {
          tmp = uint8[len - 1]
          output += lookup[tmp >> 2]
          output += lookup[(tmp << 4) & 0x3F]
          output += '=='
        } else if (extraBytes === 2) {
          tmp = (uint8[len - 2] << 8) + (uint8[len - 1])
          output += lookup[tmp >> 10]
          output += lookup[(tmp >> 4) & 0x3F]
          output += lookup[(tmp << 2) & 0x3F]
          output += '='
        }

        parts.push(output)

        return parts.join('')
      }

    }
    , {}],
    2: [function(require, module, exports) {
      exports.read = function(buffer, offset, isLE, mLen, nBytes) {
        var e, m
        var eLen = nBytes * 8 - mLen - 1
        var eMax = (1 << eLen) - 1
        var eBias = eMax >> 1
        var nBits = -7
        var i = isLE ? (nBytes - 1) : 0
        var d = isLE ? -1 : 1
        var s = buffer[offset + i]

        i += d

        e = s & ((1 << (-nBits)) - 1)
        s >>= (-nBits)
        nBits += eLen
        for (; nBits > 0; e = e * 256 + buffer[offset + i],
        i += d,
        nBits -= 8) {}

        m = e & ((1 << (-nBits)) - 1)
        e >>= (-nBits)
        nBits += mLen
        for (; nBits > 0; m = m * 256 + buffer[offset + i],
        i += d,
        nBits -= 8) {}

        if (e === 0) {
          e = 1 - eBias
        } else if (e === eMax) {
          return m ? NaN : ((s ? -1 : 1) * Infinity)
        } else {
          m = m + Math.pow(2, mLen)
          e = e - eBias
        }
        return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
      }

      exports.write = function(buffer, value, offset, isLE, mLen, nBytes) {
        var e, m, c
        var eLen = nBytes * 8 - mLen - 1
        var eMax = (1 << eLen) - 1
        var eBias = eMax >> 1
        var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
        var i = isLE ? 0 : (nBytes - 1)
        var d = isLE ? 1 : -1
        var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0

        value = Math.abs(value)

        if (isNaN(value) || value === Infinity) {
          m = isNaN(value) ? 1 : 0
          e = eMax
        } else {
          e = Math.floor(Math.log(value) / Math.LN2)
          if (value * (c = Math.pow(2, -e)) < 1) {
            e--
            c *= 2
          }
          if (e + eBias >= 1) {
            value += rt / c
          } else {
            value += rt * Math.pow(2, 1 - eBias)
          }
          if (value * c >= 2) {
            e++
            c /= 2
          }

          if (e + eBias >= eMax) {
            m = 0
            e = eMax
          } else if (e + eBias >= 1) {
            m = (value * c - 1) * Math.pow(2, mLen)
            e = e + eBias
          } else {
            m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
            e = 0
          }
        }

        for (; mLen >= 8; buffer[offset + i] = m & 0xff,
        i += d,
        m /= 256,
        mLen -= 8) {}

        e = (e << mLen) | m
        eLen += mLen
        for (; eLen > 0; buffer[offset + i] = e & 0xff,
        i += d,
        e /= 256,
        eLen -= 8) {}

        buffer[offset + i - d] |= s * 128
      }

    }
    , {}],
    3: [function(require, module, exports) {
      var toString = {}.toString;

      module.exports = Array.isArray || function(arr) {
        return toString.call(arr) == '[object Array]';
      }
      ;

    }
    , {}],
    "buffer": [function(require, module, exports) {
      (function(global) {
        /*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
 * @license  MIT
 */
        /* eslint-disable no-proto */

        'use strict'

        var base64 = require('base64-js')
        var ieee754 = require('ieee754')
        var isArray = require('isarray')

        exports.Buffer = Buffer
        exports.SlowBuffer = SlowBuffer
        exports.INSPECT_MAX_BYTES = 50

        /**
 * If `Buffer.TYPED_ARRAY_SUPPORT`:
 *   === true    Use Uint8Array implementation (fastest)
 *   === false   Use Object implementation (most compatible, even IE6)
 *
 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
 * Opera 11.6+, iOS 4.2+.
 *
 * Due to various browser bugs, sometimes the Object implementation will be used even
 * when the browser supports typed arrays.
 *
 * Note:
 *
 *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
 *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
 *
 *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
 *
 *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
 *     incorrect length in some situations.

 * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
 * get the Object implementation, which is slower but behaves correctly.
 */
        Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined ? global.TYPED_ARRAY_SUPPORT : typedArraySupport()

        /*
 * Export kMaxLength after typed array support is determined.
 */
        exports.kMaxLength = kMaxLength()

        function typedArraySupport() {
          try {
            var arr = new Uint8Array(1)
            arr.__proto__ = {
              __proto__: Uint8Array.prototype,
              foo: function() {
                return 42
              }
            }
            return arr.foo() === 42 && // typed array instances can be augmented
            typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
            arr.subarray(1, 1).byteLength === 0
            // ie10 has broken `subarray`
          } catch (e) {
            return false
          }
        }

        function kMaxLength() {
          return Buffer.TYPED_ARRAY_SUPPORT ? 0x7fffffff : 0x3fffffff
        }

        function createBuffer(that, length) {
          if (kMaxLength() < length) {
            throw new RangeError('Invalid typed array length')
          }
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            // Return an augmented `Uint8Array` instance, for best performance
            that = new Uint8Array(length)
            that.__proto__ = Buffer.prototype
          } else {
            // Fallback: Return an object instance of the Buffer class
            if (that === null) {
              that = new Buffer(length)
            }
            that.length = length
          }

          return that
        }

        /**
 * The Buffer constructor returns instances of `Uint8Array` that have their
 * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
 * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
 * and the `Uint8Array` methods. Square bracket notation works as expected -- it
 * returns a single octet.
 *
 * The `Uint8Array` prototype remains unmodified.
 */

        function Buffer(arg, encodingOrOffset, length) {
          if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
            return new Buffer(arg,encodingOrOffset,length)
          }

          // Common case.
          if (typeof arg === 'number') {
            if (typeof encodingOrOffset === 'string') {
              throw new Error('If encoding is specified then the first argument must be a string')
            }
            return allocUnsafe(this, arg)
          }
          return from(this, arg, encodingOrOffset, length)
        }

        Buffer.poolSize = 8192
        // not used by this implementation

        // TODO: Legacy, not needed anymore. Remove in next major version.
        Buffer._augment = function(arr) {
          arr.__proto__ = Buffer.prototype
          return arr
        }

        function from(that, value, encodingOrOffset, length) {
          if (typeof value === 'number') {
            throw new TypeError('"value" argument must not be a number')
          }

          if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
            return fromArrayBuffer(that, value, encodingOrOffset, length)
          }

          if (typeof value === 'string') {
            return fromString(that, value, encodingOrOffset)
          }

          return fromObject(that, value)
        }

        /**
 * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
 * if value is a number.
 * Buffer.from(str[, encoding])
 * Buffer.from(array)
 * Buffer.from(buffer)
 * Buffer.from(arrayBuffer[, byteOffset[, length]])
 **/
        Buffer.from = function(value, encodingOrOffset, length) {
          return from(null, value, encodingOrOffset, length)
        }

        if (Buffer.TYPED_ARRAY_SUPPORT) {
          Buffer.prototype.__proto__ = Uint8Array.prototype
          Buffer.__proto__ = Uint8Array
          if (typeof Symbol !== 'undefined' && Symbol.species && Buffer[Symbol.species] === Buffer) {
            // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
            Object.defineProperty(Buffer, Symbol.species, {
              value: null,
              configurable: true
            })
          }
        }

        function assertSize(size) {
          if (typeof size !== 'number') {
            throw new TypeError('"size" argument must be a number')
          } else if (size < 0) {
            throw new RangeError('"size" argument must not be negative')
          }
        }

        function alloc(that, size, fill, encoding) {
          assertSize(size)
          if (size <= 0) {
            return createBuffer(that, size)
          }
          if (fill !== undefined) {
            // Only pay attention to encoding if it's a string. This
            // prevents accidentally sending in a number that would
            // be interpretted as a start offset.
            return typeof encoding === 'string' ? createBuffer(that, size).fill(fill, encoding) : createBuffer(that, size).fill(fill)
          }
          return createBuffer(that, size)
        }

        /**
 * Creates a new filled Buffer instance.
 * alloc(size[, fill[, encoding]])
 **/
        Buffer.alloc = function(size, fill, encoding) {
          return alloc(null, size, fill, encoding)
        }

        function allocUnsafe(that, size) {
          assertSize(size)
          that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
          if (!Buffer.TYPED_ARRAY_SUPPORT) {
            for (var i = 0; i < size; ++i) {
              that[i] = 0
            }
          }
          return that
        }

        /**
 * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
 * */
        Buffer.allocUnsafe = function(size) {
          return allocUnsafe(null, size)
        }
        /**
 * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
 */
        Buffer.allocUnsafeSlow = function(size) {
          return allocUnsafe(null, size)
        }

        function fromString(that, string, encoding) {
          if (typeof encoding !== 'string' || encoding === '') {
            encoding = 'utf8'
          }

          if (!Buffer.isEncoding(encoding)) {
            throw new TypeError('"encoding" must be a valid string encoding')
          }

          var length = byteLength(string, encoding) | 0
          that = createBuffer(that, length)

          var actual = that.write(string, encoding)

          if (actual !== length) {
            // Writing a hex string, for example, that contains invalid characters will
            // cause everything after the first invalid character to be ignored. (e.g.
            // 'abxxcd' will be treated as 'ab')
            that = that.slice(0, actual)
          }

          return that
        }

        function fromArrayLike(that, array) {
          var length = array.length < 0 ? 0 : checked(array.length) | 0
          that = createBuffer(that, length)
          for (var i = 0; i < length; i += 1) {
            that[i] = array[i] & 255
          }
          return that
        }

        function fromArrayBuffer(that, array, byteOffset, length) {
          array.byteLength
          // this throws if `array` is not a valid ArrayBuffer

          if (byteOffset < 0 || array.byteLength < byteOffset) {
            throw new RangeError('\'offset\' is out of bounds')
          }

          if (array.byteLength < byteOffset + (length || 0)) {
            throw new RangeError('\'length\' is out of bounds')
          }

          if (byteOffset === undefined && length === undefined) {
            array = new Uint8Array(array)
          } else if (length === undefined) {
            array = new Uint8Array(array,byteOffset)
          } else {
            array = new Uint8Array(array,byteOffset,length)
          }

          if (Buffer.TYPED_ARRAY_SUPPORT) {
            // Return an augmented `Uint8Array` instance, for best performance
            that = array
            that.__proto__ = Buffer.prototype
          } else {
            // Fallback: Return an object instance of the Buffer class
            that = fromArrayLike(that, array)
          }
          return that
        }

        function fromObject(that, obj) {
          if (Buffer.isBuffer(obj)) {
            var len = checked(obj.length) | 0
            that = createBuffer(that, len)

            if (that.length === 0) {
              return that
            }

            obj.copy(that, 0, 0, len)
            return that
          }

          if (obj) {
            if ((typeof ArrayBuffer !== 'undefined' && obj.buffer instanceof ArrayBuffer) || 'length'in obj) {
              if (typeof obj.length !== 'number' || isnan(obj.length)) {
                return createBuffer(that, 0)
              }
              return fromArrayLike(that, obj)
            }

            if (obj.type === 'Buffer' && isArray(obj.data)) {
              return fromArrayLike(that, obj.data)
            }
          }

          throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
        }

        function checked(length) {
          // Note: cannot use `length < kMaxLength()` here because that fails when
          // length is NaN (which is otherwise coerced to zero.)
          if (length >= kMaxLength()) {
            throw new RangeError('Attempt to allocate Buffer larger than maximum ' + 'size: 0x' + kMaxLength().toString(16) + ' bytes')
          }
          return length | 0
        }

        function SlowBuffer(length) {
          if (+length != length) {
            // eslint-disable-line eqeqeq
            length = 0
          }
          return Buffer.alloc(+length)
        }

        Buffer.isBuffer = function isBuffer(b) {
          return !!(b != null && b._isBuffer)
        }

        Buffer.compare = function compare(a, b) {
          if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
            throw new TypeError('Arguments must be Buffers')
          }

          if (a === b)
            return 0

          var x = a.length
          var y = b.length

          for (var i = 0, len = Math.min(x, y); i < len; ++i) {
            if (a[i] !== b[i]) {
              x = a[i]
              y = b[i]
              break
            }
          }

          if (x < y)
            return -1
          if (y < x)
            return 1
          return 0
        }

        Buffer.isEncoding = function isEncoding(encoding) {
          switch (String(encoding).toLowerCase()) {
          case 'hex':
          case 'utf8':
          case 'utf-8':
          case 'ascii':
          case 'latin1':
          case 'binary':
          case 'base64':
          case 'ucs2':
          case 'ucs-2':
          case 'utf16le':
          case 'utf-16le':
            return true
          default:
            return false
          }
        }

        Buffer.concat = function concat(list, length) {
          if (!isArray(list)) {
            throw new TypeError('"list" argument must be an Array of Buffers')
          }

          if (list.length === 0) {
            return Buffer.alloc(0)
          }

          var i
          if (length === undefined) {
            length = 0
            for (i = 0; i < list.length; ++i) {
              length += list[i].length
            }
          }

          var buffer = Buffer.allocUnsafe(length)
          var pos = 0
          for (i = 0; i < list.length; ++i) {
            var buf = list[i]
            if (!Buffer.isBuffer(buf)) {
              throw new TypeError('"list" argument must be an Array of Buffers')
            }
            buf.copy(buffer, pos)
            pos += buf.length
          }
          return buffer
        }

        function byteLength(string, encoding) {
          if (Buffer.isBuffer(string)) {
            return string.length
          }
          if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' && (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
            return string.byteLength
          }
          if (typeof string !== 'string') {
            string = '' + string
          }

          var len = string.length
          if (len === 0)
            return 0

          // Use a for loop to avoid recursion
          var loweredCase = false
          for (; ; ) {
            switch (encoding) {
            case 'ascii':
            case 'latin1':
            case 'binary':
              return len
            case 'utf8':
            case 'utf-8':
            case undefined:
              return utf8ToBytes(string).length
            case 'ucs2':
            case 'ucs-2':
            case 'utf16le':
            case 'utf-16le':
              return len * 2
            case 'hex':
              return len >>> 1
            case 'base64':
              return base64ToBytes(string).length
            default:
              if (loweredCase)
                return utf8ToBytes(string).length
              // assume utf8
              encoding = ('' + encoding).toLowerCase()
              loweredCase = true
            }
          }
        }
        Buffer.byteLength = byteLength

        function slowToString(encoding, start, end) {
          var loweredCase = false

          // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
          // property of a typed array.

          // This behaves neither like String nor Uint8Array in that we set start/end
          // to their upper/lower bounds if the value passed is out of range.
          // undefined is handled specially as per ECMA-262 6th Edition,
          // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
          if (start === undefined || start < 0) {
            start = 0
          }
          // Return early if start > this.length. Done here to prevent potential uint32
          // coercion fail below.
          if (start > this.length) {
            return ''
          }

          if (end === undefined || end > this.length) {
            end = this.length
          }

          if (end <= 0) {
            return ''
          }

          // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
          end >>>= 0
          start >>>= 0

          if (end <= start) {
            return ''
          }

          if (!encoding)
            encoding = 'utf8'

          while (true) {
            switch (encoding) {
            case 'hex':
              return hexSlice(this, start, end)

            case 'utf8':
            case 'utf-8':
              return utf8Slice(this, start, end)

            case 'ascii':
              return asciiSlice(this, start, end)

            case 'latin1':
            case 'binary':
              return latin1Slice(this, start, end)

            case 'base64':
              return base64Slice(this, start, end)

            case 'ucs2':
            case 'ucs-2':
            case 'utf16le':
            case 'utf-16le':
              return utf16leSlice(this, start, end)

            default:
              if (loweredCase)
                throw new TypeError('Unknown encoding: ' + encoding)
              encoding = (encoding + '').toLowerCase()
              loweredCase = true
            }
          }
        }

        // The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
        // Buffer instances.
        Buffer.prototype._isBuffer = true

        function swap(b, n, m) {
          var i = b[n]
          b[n] = b[m]
          b[m] = i
        }

        Buffer.prototype.swap16 = function swap16() {
          var len = this.length
          if (len % 2 !== 0) {
            throw new RangeError('Buffer size must be a multiple of 16-bits')
          }
          for (var i = 0; i < len; i += 2) {
            swap(this, i, i + 1)
          }
          return this
        }

        Buffer.prototype.swap32 = function swap32() {
          var len = this.length
          if (len % 4 !== 0) {
            throw new RangeError('Buffer size must be a multiple of 32-bits')
          }
          for (var i = 0; i < len; i += 4) {
            swap(this, i, i + 3)
            swap(this, i + 1, i + 2)
          }
          return this
        }

        Buffer.prototype.swap64 = function swap64() {
          var len = this.length
          if (len % 8 !== 0) {
            throw new RangeError('Buffer size must be a multiple of 64-bits')
          }
          for (var i = 0; i < len; i += 8) {
            swap(this, i, i + 7)
            swap(this, i + 1, i + 6)
            swap(this, i + 2, i + 5)
            swap(this, i + 3, i + 4)
          }
          return this
        }

        Buffer.prototype.toString = function toString() {
          var length = this.length | 0
          if (length === 0)
            return ''
          if (arguments.length === 0)
            return utf8Slice(this, 0, length)
          return slowToString.apply(this, arguments)
        }

        Buffer.prototype.equals = function equals(b) {
          if (!Buffer.isBuffer(b))
            throw new TypeError('Argument must be a Buffer')
          if (this === b)
            return true
          return Buffer.compare(this, b) === 0
        }

        Buffer.prototype.inspect = function inspect() {
          var str = ''
          var max = exports.INSPECT_MAX_BYTES
          if (this.length > 0) {
            str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
            if (this.length > max)
              str += ' ... '
          }
          return '<Buffer ' + str + '>'
        }

        Buffer.prototype.compare = function compare(target, start, end, thisStart, thisEnd) {
          if (!Buffer.isBuffer(target)) {
            throw new TypeError('Argument must be a Buffer')
          }

          if (start === undefined) {
            start = 0
          }
          if (end === undefined) {
            end = target ? target.length : 0
          }
          if (thisStart === undefined) {
            thisStart = 0
          }
          if (thisEnd === undefined) {
            thisEnd = this.length
          }

          if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
            throw new RangeError('out of range index')
          }

          if (thisStart >= thisEnd && start >= end) {
            return 0
          }
          if (thisStart >= thisEnd) {
            return -1
          }
          if (start >= end) {
            return 1
          }

          start >>>= 0
          end >>>= 0
          thisStart >>>= 0
          thisEnd >>>= 0

          if (this === target)
            return 0

          var x = thisEnd - thisStart
          var y = end - start
          var len = Math.min(x, y)

          var thisCopy = this.slice(thisStart, thisEnd)
          var targetCopy = target.slice(start, end)

          for (var i = 0; i < len; ++i) {
            if (thisCopy[i] !== targetCopy[i]) {
              x = thisCopy[i]
              y = targetCopy[i]
              break
            }
          }

          if (x < y)
            return -1
          if (y < x)
            return 1
          return 0
        }

        // Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
        // OR the last index of `val` in `buffer` at offset <= `byteOffset`.
        //
        // Arguments:
        // - buffer - a Buffer to search
        // - val - a string, Buffer, or number
        // - byteOffset - an index into `buffer`; will be clamped to an int32
        // - encoding - an optional encoding, relevant is val is a string
        // - dir - true for indexOf, false for lastIndexOf
        function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {
          // Empty buffer means no match
          if (buffer.length === 0)
            return -1

          // Normalize byteOffset
          if (typeof byteOffset === 'string') {
            encoding = byteOffset
            byteOffset = 0
          } else if (byteOffset > 0x7fffffff) {
            byteOffset = 0x7fffffff
          } else if (byteOffset < -0x80000000) {
            byteOffset = -0x80000000
          }
          byteOffset = +byteOffset
          // Coerce to Number.
          if (isNaN(byteOffset)) {
            // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
            byteOffset = dir ? 0 : (buffer.length - 1)
          }

          // Normalize byteOffset: negative offsets start from the end of the buffer
          if (byteOffset < 0)
            byteOffset = buffer.length + byteOffset
          if (byteOffset >= buffer.length) {
            if (dir)
              return -1
            else
              byteOffset = buffer.length - 1
          } else if (byteOffset < 0) {
            if (dir)
              byteOffset = 0
            else
              return -1
          }

          // Normalize val
          if (typeof val === 'string') {
            val = Buffer.from(val, encoding)
          }

          // Finally, search either indexOf (if dir is true) or lastIndexOf
          if (Buffer.isBuffer(val)) {
            // Special case: looking for empty string/buffer always fails
            if (val.length === 0) {
              return -1
            }
            return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
          } else if (typeof val === 'number') {
            val = val & 0xFF
            // Search for a byte value [0-255]
            if (Buffer.TYPED_ARRAY_SUPPORT && typeof Uint8Array.prototype.indexOf === 'function') {
              if (dir) {
                return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
              } else {
                return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
              }
            }
            return arrayIndexOf(buffer, [val], byteOffset, encoding, dir)
          }

          throw new TypeError('val must be string, number or Buffer')
        }

        function arrayIndexOf(arr, val, byteOffset, encoding, dir) {
          var indexSize = 1
          var arrLength = arr.length
          var valLength = val.length

          if (encoding !== undefined) {
            encoding = String(encoding).toLowerCase()
            if (encoding === 'ucs2' || encoding === 'ucs-2' || encoding === 'utf16le' || encoding === 'utf-16le') {
              if (arr.length < 2 || val.length < 2) {
                return -1
              }
              indexSize = 2
              arrLength /= 2
              valLength /= 2
              byteOffset /= 2
            }
          }

          function read(buf, i) {
            if (indexSize === 1) {
              return buf[i]
            } else {
              return buf.readUInt16BE(i * indexSize)
            }
          }

          var i
          if (dir) {
            var foundIndex = -1
            for (i = byteOffset; i < arrLength; i++) {
              if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
                if (foundIndex === -1)
                  foundIndex = i
                if (i - foundIndex + 1 === valLength)
                  return foundIndex * indexSize
              } else {
                if (foundIndex !== -1)
                  i -= i - foundIndex
                foundIndex = -1
              }
            }
          } else {
            if (byteOffset + valLength > arrLength)
              byteOffset = arrLength - valLength
            for (i = byteOffset; i >= 0; i--) {
              var found = true
              for (var j = 0; j < valLength; j++) {
                if (read(arr, i + j) !== read(val, j)) {
                  found = false
                  break
                }
              }
              if (found)
                return i
            }
          }

          return -1
        }

        Buffer.prototype.includes = function includes(val, byteOffset, encoding) {
          return this.indexOf(val, byteOffset, encoding) !== -1
        }

        Buffer.prototype.indexOf = function indexOf(val, byteOffset, encoding) {
          return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
        }

        Buffer.prototype.lastIndexOf = function lastIndexOf(val, byteOffset, encoding) {
          return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
        }

        function hexWrite(buf, string, offset, length) {
          offset = Number(offset) || 0
          var remaining = buf.length - offset
          if (!length) {
            length = remaining
          } else {
            length = Number(length)
            if (length > remaining) {
              length = remaining
            }
          }

          // must be an even number of digits
          var strLen = string.length
          if (strLen % 2 !== 0)
            throw new TypeError('Invalid hex string')

          if (length > strLen / 2) {
            length = strLen / 2
          }
          for (var i = 0; i < length; ++i) {
            var parsed = parseInt(string.substr(i * 2, 2), 16)
            if (isNaN(parsed))
              return i
            buf[offset + i] = parsed
          }
          return i
        }

        function utf8Write(buf, string, offset, length) {
          return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
        }

        function asciiWrite(buf, string, offset, length) {
          return blitBuffer(asciiToBytes(string), buf, offset, length)
        }

        function latin1Write(buf, string, offset, length) {
          return asciiWrite(buf, string, offset, length)
        }

        function base64Write(buf, string, offset, length) {
          return blitBuffer(base64ToBytes(string), buf, offset, length)
        }

        function ucs2Write(buf, string, offset, length) {
          return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
        }

        Buffer.prototype.write = function write(string, offset, length, encoding) {
          // Buffer#write(string)
          if (offset === undefined) {
            encoding = 'utf8'
            length = this.length
            offset = 0
            // Buffer#write(string, encoding)
          } else if (length === undefined && typeof offset === 'string') {
            encoding = offset
            length = this.length
            offset = 0
            // Buffer#write(string, offset[, length][, encoding])
          } else if (isFinite(offset)) {
            offset = offset | 0
            if (isFinite(length)) {
              length = length | 0
              if (encoding === undefined)
                encoding = 'utf8'
            } else {
              encoding = length
              length = undefined
            }
            // legacy write(string, encoding, offset, length) - remove in v0.13
          } else {
            throw new Error('Buffer.write(string, encoding, offset[, length]) is no longer supported')
          }

          var remaining = this.length - offset
          if (length === undefined || length > remaining)
            length = remaining

          if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
            throw new RangeError('Attempt to write outside buffer bounds')
          }

          if (!encoding)
            encoding = 'utf8'

          var loweredCase = false
          for (; ; ) {
            switch (encoding) {
            case 'hex':
              return hexWrite(this, string, offset, length)

            case 'utf8':
            case 'utf-8':
              return utf8Write(this, string, offset, length)

            case 'ascii':
              return asciiWrite(this, string, offset, length)

            case 'latin1':
            case 'binary':
              return latin1Write(this, string, offset, length)

            case 'base64':
              // Warning: maxLength not taken into account in base64Write
              return base64Write(this, string, offset, length)

            case 'ucs2':
            case 'ucs-2':
            case 'utf16le':
            case 'utf-16le':
              return ucs2Write(this, string, offset, length)

            default:
              if (loweredCase)
                throw new TypeError('Unknown encoding: ' + encoding)
              encoding = ('' + encoding).toLowerCase()
              loweredCase = true
            }
          }
        }

        Buffer.prototype.toJSON = function toJSON() {
          return {
            type: 'Buffer',
            data: Array.prototype.slice.call(this._arr || this, 0)
          }
        }

        function base64Slice(buf, start, end) {
          if (start === 0 && end === buf.length) {
            return base64.fromByteArray(buf)
          } else {
            return base64.fromByteArray(buf.slice(start, end))
          }
        }

        function utf8Slice(buf, start, end) {
          end = Math.min(buf.length, end)
          var res = []

          var i = start
          while (i < end) {
            var firstByte = buf[i]
            var codePoint = null
            var bytesPerSequence = (firstByte > 0xEF) ? 4 : (firstByte > 0xDF) ? 3 : (firstByte > 0xBF) ? 2 : 1

            if (i + bytesPerSequence <= end) {
              var secondByte, thirdByte, fourthByte, tempCodePoint

              switch (bytesPerSequence) {
              case 1:
                if (firstByte < 0x80) {
                  codePoint = firstByte
                }
                break
              case 2:
                secondByte = buf[i + 1]
                if ((secondByte & 0xC0) === 0x80) {
                  tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
                  if (tempCodePoint > 0x7F) {
                    codePoint = tempCodePoint
                  }
                }
                break
              case 3:
                secondByte = buf[i + 1]
                thirdByte = buf[i + 2]
                if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
                  tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
                  if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
                    codePoint = tempCodePoint
                  }
                }
                break
              case 4:
                secondByte = buf[i + 1]
                thirdByte = buf[i + 2]
                fourthByte = buf[i + 3]
                if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
                  tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
                  if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
                    codePoint = tempCodePoint
                  }
                }
              }
            }

            if (codePoint === null) {
              // we did not generate a valid codePoint so insert a
              // replacement char (U+FFFD) and advance only 1 byte
              codePoint = 0xFFFD
              bytesPerSequence = 1
            } else if (codePoint > 0xFFFF) {
              // encode to utf16 (surrogate pair dance)
              codePoint -= 0x10000
              res.push(codePoint >>> 10 & 0x3FF | 0xD800)
              codePoint = 0xDC00 | codePoint & 0x3FF
            }

            res.push(codePoint)
            i += bytesPerSequence
          }

          return decodeCodePointsArray(res)
        }

        // Based on http://stackoverflow.com/a/22747272/680742, the browser with
        // the lowest limit is Chrome, with 0x10000 args.
        // We go 1 magnitude less, for safety
        var MAX_ARGUMENTS_LENGTH = 0x1000

        function decodeCodePointsArray(codePoints) {
          var len = codePoints.length
          if (len <= MAX_ARGUMENTS_LENGTH) {
            return String.fromCharCode.apply(String, codePoints)
            // avoid extra slice()
          }

          // Decode in chunks to avoid "call stack size exceeded".
          var res = ''
          var i = 0
          while (i < len) {
            res += String.fromCharCode.apply(String, codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH))
          }
          return res
        }

        function asciiSlice(buf, start, end) {
          var ret = ''
          end = Math.min(buf.length, end)

          for (var i = start; i < end; ++i) {
            ret += String.fromCharCode(buf[i] & 0x7F)
          }
          return ret
        }

        function latin1Slice(buf, start, end) {
          var ret = ''
          end = Math.min(buf.length, end)

          for (var i = start; i < end; ++i) {
            ret += String.fromCharCode(buf[i])
          }
          return ret
        }

        function hexSlice(buf, start, end) {
          var len = buf.length

          if (!start || start < 0)
            start = 0
          if (!end || end < 0 || end > len)
            end = len

          var out = ''
          for (var i = start; i < end; ++i) {
            out += toHex(buf[i])
          }
          return out
        }

        function utf16leSlice(buf, start, end) {
          var bytes = buf.slice(start, end)
          var res = ''
          for (var i = 0; i < bytes.length; i += 2) {
            res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
          }
          return res
        }

        Buffer.prototype.slice = function slice(start, end) {
          var len = this.length
          start = ~~start
          end = end === undefined ? len : ~~end

          if (start < 0) {
            start += len
            if (start < 0)
              start = 0
          } else if (start > len) {
            start = len
          }

          if (end < 0) {
            end += len
            if (end < 0)
              end = 0
          } else if (end > len) {
            end = len
          }

          if (end < start)
            end = start

          var newBuf
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            newBuf = this.subarray(start, end)
            newBuf.__proto__ = Buffer.prototype
          } else {
            var sliceLen = end - start
            newBuf = new Buffer(sliceLen,undefined)
            for (var i = 0; i < sliceLen; ++i) {
              newBuf[i] = this[i + start]
            }
          }

          return newBuf
        }

        /*
 * Need to make sure that buffer isn't trying to write out of bounds.
 */
        function checkOffset(offset, ext, length) {
          if ((offset % 1) !== 0 || offset < 0)
            throw new RangeError('offset is not uint')
          if (offset + ext > length)
            throw new RangeError('Trying to access beyond buffer length')
        }

        Buffer.prototype.readUIntLE = function readUIntLE(offset, byteLength, noAssert) {
          offset = offset | 0
          byteLength = byteLength | 0
          if (!noAssert)
            checkOffset(offset, byteLength, this.length)

          var val = this[offset]
          var mul = 1
          var i = 0
          while (++i < byteLength && (mul *= 0x100)) {
            val += this[offset + i] * mul
          }

          return val
        }

        Buffer.prototype.readUIntBE = function readUIntBE(offset, byteLength, noAssert) {
          offset = offset | 0
          byteLength = byteLength | 0
          if (!noAssert) {
            checkOffset(offset, byteLength, this.length)
          }

          var val = this[offset + --byteLength]
          var mul = 1
          while (byteLength > 0 && (mul *= 0x100)) {
            val += this[offset + --byteLength] * mul
          }

          return val
        }

        Buffer.prototype.readUInt8 = function readUInt8(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 1, this.length)
          return this[offset]
        }

        Buffer.prototype.readUInt16LE = function readUInt16LE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 2, this.length)
          return this[offset] | (this[offset + 1] << 8)
        }

        Buffer.prototype.readUInt16BE = function readUInt16BE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 2, this.length)
          return (this[offset] << 8) | this[offset + 1]
        }

        Buffer.prototype.readUInt32LE = function readUInt32LE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 4, this.length)

          return ((this[offset]) | (this[offset + 1] << 8) | (this[offset + 2] << 16)) + (this[offset + 3] * 0x1000000)
        }

        Buffer.prototype.readUInt32BE = function readUInt32BE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 4, this.length)

          return (this[offset] * 0x1000000) + ((this[offset + 1] << 16) | (this[offset + 2] << 8) | this[offset + 3])
        }

        Buffer.prototype.readIntLE = function readIntLE(offset, byteLength, noAssert) {
          offset = offset | 0
          byteLength = byteLength | 0
          if (!noAssert)
            checkOffset(offset, byteLength, this.length)

          var val = this[offset]
          var mul = 1
          var i = 0
          while (++i < byteLength && (mul *= 0x100)) {
            val += this[offset + i] * mul
          }
          mul *= 0x80

          if (val >= mul)
            val -= Math.pow(2, 8 * byteLength)

          return val
        }

        Buffer.prototype.readIntBE = function readIntBE(offset, byteLength, noAssert) {
          offset = offset | 0
          byteLength = byteLength | 0
          if (!noAssert)
            checkOffset(offset, byteLength, this.length)

          var i = byteLength
          var mul = 1
          var val = this[offset + --i]
          while (i > 0 && (mul *= 0x100)) {
            val += this[offset + --i] * mul
          }
          mul *= 0x80

          if (val >= mul)
            val -= Math.pow(2, 8 * byteLength)

          return val
        }

        Buffer.prototype.readInt8 = function readInt8(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 1, this.length)
          if (!(this[offset] & 0x80))
            return (this[offset])
          return ((0xff - this[offset] + 1) * -1)
        }

        Buffer.prototype.readInt16LE = function readInt16LE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 2, this.length)
          var val = this[offset] | (this[offset + 1] << 8)
          return (val & 0x8000) ? val | 0xFFFF0000 : val
        }

        Buffer.prototype.readInt16BE = function readInt16BE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 2, this.length)
          var val = this[offset + 1] | (this[offset] << 8)
          return (val & 0x8000) ? val | 0xFFFF0000 : val
        }

        Buffer.prototype.readInt32LE = function readInt32LE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 4, this.length)

          return (this[offset]) | (this[offset + 1] << 8) | (this[offset + 2] << 16) | (this[offset + 3] << 24)
        }

        Buffer.prototype.readInt32BE = function readInt32BE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 4, this.length)

          return (this[offset] << 24) | (this[offset + 1] << 16) | (this[offset + 2] << 8) | (this[offset + 3])
        }

        Buffer.prototype.readFloatLE = function readFloatLE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 4, this.length)
          return ieee754.read(this, offset, true, 23, 4)
        }

        Buffer.prototype.readFloatBE = function readFloatBE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 4, this.length)
          return ieee754.read(this, offset, false, 23, 4)
        }

        Buffer.prototype.readDoubleLE = function readDoubleLE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 8, this.length)
          return ieee754.read(this, offset, true, 52, 8)
        }

        Buffer.prototype.readDoubleBE = function readDoubleBE(offset, noAssert) {
          if (!noAssert)
            checkOffset(offset, 8, this.length)
          return ieee754.read(this, offset, false, 52, 8)
        }

        function checkInt(buf, value, offset, ext, max, min) {
          if (!Buffer.isBuffer(buf))
            throw new TypeError('"buffer" argument must be a Buffer instance')
          if (value > max || value < min)
            throw new RangeError('"value" argument is out of bounds')
          if (offset + ext > buf.length)
            throw new RangeError('Index out of range')
        }

        Buffer.prototype.writeUIntLE = function writeUIntLE(value, offset, byteLength, noAssert) {
          value = +value
          offset = offset | 0
          byteLength = byteLength | 0
          if (!noAssert) {
            var maxBytes = Math.pow(2, 8 * byteLength) - 1
            checkInt(this, value, offset, byteLength, maxBytes, 0)
          }

          var mul = 1
          var i = 0
          this[offset] = value & 0xFF
          while (++i < byteLength && (mul *= 0x100)) {
            this[offset + i] = (value / mul) & 0xFF
          }

          return offset + byteLength
        }

        Buffer.prototype.writeUIntBE = function writeUIntBE(value, offset, byteLength, noAssert) {
          value = +value
          offset = offset | 0
          byteLength = byteLength | 0
          if (!noAssert) {
            var maxBytes = Math.pow(2, 8 * byteLength) - 1
            checkInt(this, value, offset, byteLength, maxBytes, 0)
          }

          var i = byteLength - 1
          var mul = 1
          this[offset + i] = value & 0xFF
          while (--i >= 0 && (mul *= 0x100)) {
            this[offset + i] = (value / mul) & 0xFF
          }

          return offset + byteLength
        }

        Buffer.prototype.writeUInt8 = function writeUInt8(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 1, 0xff, 0)
          if (!Buffer.TYPED_ARRAY_SUPPORT)
            value = Math.floor(value)
          this[offset] = (value & 0xff)
          return offset + 1
        }

        function objectWriteUInt16(buf, value, offset, littleEndian) {
          if (value < 0)
            value = 0xffff + value + 1
          for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {
            buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>> (littleEndian ? i : 1 - i) * 8
          }
        }

        Buffer.prototype.writeUInt16LE = function writeUInt16LE(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 2, 0xffff, 0)
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            this[offset] = (value & 0xff)
            this[offset + 1] = (value >>> 8)
          } else {
            objectWriteUInt16(this, value, offset, true)
          }
          return offset + 2
        }

        Buffer.prototype.writeUInt16BE = function writeUInt16BE(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 2, 0xffff, 0)
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            this[offset] = (value >>> 8)
            this[offset + 1] = (value & 0xff)
          } else {
            objectWriteUInt16(this, value, offset, false)
          }
          return offset + 2
        }

        function objectWriteUInt32(buf, value, offset, littleEndian) {
          if (value < 0)
            value = 0xffffffff + value + 1
          for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {
            buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
          }
        }

        Buffer.prototype.writeUInt32LE = function writeUInt32LE(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 4, 0xffffffff, 0)
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            this[offset + 3] = (value >>> 24)
            this[offset + 2] = (value >>> 16)
            this[offset + 1] = (value >>> 8)
            this[offset] = (value & 0xff)
          } else {
            objectWriteUInt32(this, value, offset, true)
          }
          return offset + 4
        }

        Buffer.prototype.writeUInt32BE = function writeUInt32BE(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 4, 0xffffffff, 0)
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            this[offset] = (value >>> 24)
            this[offset + 1] = (value >>> 16)
            this[offset + 2] = (value >>> 8)
            this[offset + 3] = (value & 0xff)
          } else {
            objectWriteUInt32(this, value, offset, false)
          }
          return offset + 4
        }

        Buffer.prototype.writeIntLE = function writeIntLE(value, offset, byteLength, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert) {
            var limit = Math.pow(2, 8 * byteLength - 1)

            checkInt(this, value, offset, byteLength, limit - 1, -limit)
          }

          var i = 0
          var mul = 1
          var sub = 0
          this[offset] = value & 0xFF
          while (++i < byteLength && (mul *= 0x100)) {
            if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
              sub = 1
            }
            this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
          }

          return offset + byteLength
        }

        Buffer.prototype.writeIntBE = function writeIntBE(value, offset, byteLength, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert) {
            var limit = Math.pow(2, 8 * byteLength - 1)

            checkInt(this, value, offset, byteLength, limit - 1, -limit)
          }

          var i = byteLength - 1
          var mul = 1
          var sub = 0
          this[offset + i] = value & 0xFF
          while (--i >= 0 && (mul *= 0x100)) {
            if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
              sub = 1
            }
            this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
          }

          return offset + byteLength
        }

        Buffer.prototype.writeInt8 = function writeInt8(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 1, 0x7f, -0x80)
          if (!Buffer.TYPED_ARRAY_SUPPORT)
            value = Math.floor(value)
          if (value < 0)
            value = 0xff + value + 1
          this[offset] = (value & 0xff)
          return offset + 1
        }

        Buffer.prototype.writeInt16LE = function writeInt16LE(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 2, 0x7fff, -0x8000)
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            this[offset] = (value & 0xff)
            this[offset + 1] = (value >>> 8)
          } else {
            objectWriteUInt16(this, value, offset, true)
          }
          return offset + 2
        }

        Buffer.prototype.writeInt16BE = function writeInt16BE(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 2, 0x7fff, -0x8000)
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            this[offset] = (value >>> 8)
            this[offset + 1] = (value & 0xff)
          } else {
            objectWriteUInt16(this, value, offset, false)
          }
          return offset + 2
        }

        Buffer.prototype.writeInt32LE = function writeInt32LE(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            this[offset] = (value & 0xff)
            this[offset + 1] = (value >>> 8)
            this[offset + 2] = (value >>> 16)
            this[offset + 3] = (value >>> 24)
          } else {
            objectWriteUInt32(this, value, offset, true)
          }
          return offset + 4
        }

        Buffer.prototype.writeInt32BE = function writeInt32BE(value, offset, noAssert) {
          value = +value
          offset = offset | 0
          if (!noAssert)
            checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
          if (value < 0)
            value = 0xffffffff + value + 1
          if (Buffer.TYPED_ARRAY_SUPPORT) {
            this[offset] = (value >>> 24)
            this[offset + 1] = (value >>> 16)
            this[offset + 2] = (value >>> 8)
            this[offset + 3] = (value & 0xff)
          } else {
            objectWriteUInt32(this, value, offset, false)
          }
          return offset + 4
        }

        function checkIEEE754(buf, value, offset, ext, max, min) {
          if (offset + ext > buf.length)
            throw new RangeError('Index out of range')
          if (offset < 0)
            throw new RangeError('Index out of range')
        }

        function writeFloat(buf, value, offset, littleEndian, noAssert) {
          if (!noAssert) {
            checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
          }
          ieee754.write(buf, value, offset, littleEndian, 23, 4)
          return offset + 4
        }

        Buffer.prototype.writeFloatLE = function writeFloatLE(value, offset, noAssert) {
          return writeFloat(this, value, offset, true, noAssert)
        }

        Buffer.prototype.writeFloatBE = function writeFloatBE(value, offset, noAssert) {
          return writeFloat(this, value, offset, false, noAssert)
        }

        function writeDouble(buf, value, offset, littleEndian, noAssert) {
          if (!noAssert) {
            checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
          }
          ieee754.write(buf, value, offset, littleEndian, 52, 8)
          return offset + 8
        }

        Buffer.prototype.writeDoubleLE = function writeDoubleLE(value, offset, noAssert) {
          return writeDouble(this, value, offset, true, noAssert)
        }

        Buffer.prototype.writeDoubleBE = function writeDoubleBE(value, offset, noAssert) {
          return writeDouble(this, value, offset, false, noAssert)
        }

        // copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
        Buffer.prototype.copy = function copy(target, targetStart, start, end) {
          if (!start)
            start = 0
          if (!end && end !== 0)
            end = this.length
          if (targetStart >= target.length)
            targetStart = target.length
          if (!targetStart)
            targetStart = 0
          if (end > 0 && end < start)
            end = start

          // Copy 0 bytes; we're done
          if (end === start)
            return 0
          if (target.length === 0 || this.length === 0)
            return 0

          // Fatal error conditions
          if (targetStart < 0) {
            throw new RangeError('targetStart out of bounds')
          }
          if (start < 0 || start >= this.length)
            throw new RangeError('sourceStart out of bounds')
          if (end < 0)
            throw new RangeError('sourceEnd out of bounds')

          // Are we oob?
          if (end > this.length)
            end = this.length
          if (target.length - targetStart < end - start) {
            end = target.length - targetStart + start
          }

          var len = end - start
          var i

          if (this === target && start < targetStart && targetStart < end) {
            // descending copy from end
            for (i = len - 1; i >= 0; --i) {
              target[i + targetStart] = this[i + start]
            }
          } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
            // ascending copy from start
            for (i = 0; i < len; ++i) {
              target[i + targetStart] = this[i + start]
            }
          } else {
            Uint8Array.prototype.set.call(target, this.subarray(start, start + len), targetStart)
          }

          return len
        }

        // Usage:
        //    buffer.fill(number[, offset[, end]])
        //    buffer.fill(buffer[, offset[, end]])
        //    buffer.fill(string[, offset[, end]][, encoding])
        Buffer.prototype.fill = function fill(val, start, end, encoding) {
          // Handle string cases:
          if (typeof val === 'string') {
            if (typeof start === 'string') {
              encoding = start
              start = 0
              end = this.length
            } else if (typeof end === 'string') {
              encoding = end
              end = this.length
            }
            if (val.length === 1) {
              var code = val.charCodeAt(0)
              if (code < 256) {
                val = code
              }
            }
            if (encoding !== undefined && typeof encoding !== 'string') {
              throw new TypeError('encoding must be a string')
            }
            if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
              throw new TypeError('Unknown encoding: ' + encoding)
            }
          } else if (typeof val === 'number') {
            val = val & 255
          }

          // Invalid ranges are not set to a default, so can range check early.
          if (start < 0 || this.length < start || this.length < end) {
            throw new RangeError('Out of range index')
          }

          if (end <= start) {
            return this
          }

          start = start >>> 0
          end = end === undefined ? this.length : end >>> 0

          if (!val)
            val = 0

          var i
          if (typeof val === 'number') {
            for (i = start; i < end; ++i) {
              this[i] = val
            }
          } else {
            var bytes = Buffer.isBuffer(val) ? val : utf8ToBytes(new Buffer(val,encoding).toString())
            var len = bytes.length
            for (i = 0; i < end - start; ++i) {
              this[i + start] = bytes[i % len]
            }
          }

          return this
        }

        // HELPER FUNCTIONS
        // ================

        var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g

        function base64clean(str) {
          // Node strips out invalid characters like \n and \t from the string, base64-js does not
          str = stringtrim(str).replace(INVALID_BASE64_RE, '')
          // Node converts strings with length < 2 to ''
          if (str.length < 2)
            return ''
          // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
          while (str.length % 4 !== 0) {
            str = str + '='
          }
          return str
        }

        function stringtrim(str) {
          if (str.trim)
            return str.trim()
          return str.replace(/^\s+|\s+$/g, '')
        }

        function toHex(n) {
          if (n < 16)
            return '0' + n.toString(16)
          return n.toString(16)
        }

        function utf8ToBytes(string, units) {
          units = units || Infinity
          var codePoint
          var length = string.length
          var leadSurrogate = null
          var bytes = []

          for (var i = 0; i < length; ++i) {
            codePoint = string.charCodeAt(i)

            // is surrogate component
            if (codePoint > 0xD7FF && codePoint < 0xE000) {
              // last char was a lead
              if (!leadSurrogate) {
                // no lead yet
                if (codePoint > 0xDBFF) {
                  // unexpected trail
                  if ((units -= 3) > -1)
                    bytes.push(0xEF, 0xBF, 0xBD)
                  continue
                } else if (i + 1 === length) {
                  // unpaired lead
                  if ((units -= 3) > -1)
                    bytes.push(0xEF, 0xBF, 0xBD)
                  continue
                }

                // valid lead
                leadSurrogate = codePoint

                continue
              }

              // 2 leads in a row
              if (codePoint < 0xDC00) {
                if ((units -= 3) > -1)
                  bytes.push(0xEF, 0xBF, 0xBD)
                leadSurrogate = codePoint
                continue
              }

              // valid surrogate pair
              codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
            } else if (leadSurrogate) {
              // valid bmp char, but last char was a lead
              if ((units -= 3) > -1)
                bytes.push(0xEF, 0xBF, 0xBD)
            }

            leadSurrogate = null

            // encode utf8
            if (codePoint < 0x80) {
              if ((units -= 1) < 0)
                break
              bytes.push(codePoint)
            } else if (codePoint < 0x800) {
              if ((units -= 2) < 0)
                break
              bytes.push(codePoint >> 0x6 | 0xC0, codePoint & 0x3F | 0x80)
            } else if (codePoint < 0x10000) {
              if ((units -= 3) < 0)
                break
              bytes.push(codePoint >> 0xC | 0xE0, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80)
            } else if (codePoint < 0x110000) {
              if ((units -= 4) < 0)
                break
              bytes.push(codePoint >> 0x12 | 0xF0, codePoint >> 0xC & 0x3F | 0x80, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80)
            } else {
              throw new Error('Invalid code point')
            }
          }

          return bytes
        }

        function asciiToBytes(str) {
          var byteArray = []
          for (var i = 0; i < str.length; ++i) {
            // Node's code seems to be doing this and not & 0x7F..
            byteArray.push(str.charCodeAt(i) & 0xFF)
          }
          return byteArray
        }

        function utf16leToBytes(str, units) {
          var c, hi, lo
          var byteArray = []
          for (var i = 0; i < str.length; ++i) {
            if ((units -= 2) < 0)
              break

            c = str.charCodeAt(i)
            hi = c >> 8
            lo = c % 256
            byteArray.push(lo)
            byteArray.push(hi)
          }

          return byteArray
        }

        function base64ToBytes(str) {
          return base64.toByteArray(base64clean(str))
        }

        function blitBuffer(src, dst, offset, length) {
          for (var i = 0; i < length; ++i) {
            if ((i + offset >= dst.length) || (i >= src.length))
              break
            dst[i + offset] = src[i]
          }
          return i
        }

        function isnan(val) {
          return val !== val
          // eslint-disable-line no-self-compare
        }

      }).call(this, typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    }
    , {
      "base64-js": 1,
      "ieee754": 2,
      "isarray": 3
    }]
  }, {}, [])("buffer")
});