Swap-Aggregator-Subgraph/node_modules/multibase/dist/index.js

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/* 0 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";
/* WEBPACK VAR INJECTION */(function(global) {/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <http://feross.org>
 * @license  MIT
 */

/* eslint-disable no-proto */


var base64 = __webpack_require__(4);

var ieee754 = __webpack_require__(5);

var isArray = __webpack_require__(6);

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 foo() {
        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
}
/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(3)))

/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {

module.exports = __webpack_require__(2);


/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";
/**
 * Implementation of the [multibase](https://github.com/multiformats/multibase) specification.
 * @module Multibase
 */


const {
  Buffer
} = __webpack_require__(0);

const constants = __webpack_require__(7);

exports = module.exports = multibase;
exports.encode = encode;
exports.decode = decode;
exports.isEncoded = isEncoded;
exports.names = Object.freeze(Object.keys(constants.names));
exports.codes = Object.freeze(Object.keys(constants.codes));
const errNotSupported = new Error('Unsupported encoding');
/**
 * Create a new buffer with the multibase varint+code.
 *
 * @param {string|number} nameOrCode - The multibase name or code number.
 * @param {Buffer} buf - The data to be prefixed with multibase.
 * @memberof Multibase
 * @returns {Buffer}
 */

function multibase(nameOrCode, buf) {
  if (!buf) {
    throw new Error('requires an encoded buffer');
  }

  const base = getBase(nameOrCode);
  const codeBuf = Buffer.from(base.code);
  const name = base.name;
  validEncode(name, buf);
  return Buffer.concat([codeBuf, buf]);
}
/**
 * Encode data with the specified base and add the multibase prefix.
 *
 * @param {string|number} nameOrCode - The multibase name or code number.
 * @param {Buffer} buf - The data to be encoded.
 * @returns {Buffer}
 * @memberof Multibase
 */


function encode(nameOrCode, buf) {
  const base = getBase(nameOrCode);
  const name = base.name;
  return multibase(name, Buffer.from(base.encode(buf)));
}
/**
 * Takes a buffer or string encoded with multibase header, decodes it and
 * returns the decoded buffer
 *
 * @param {Buffer|string} bufOrString
 * @returns {Buffer}
 * @memberof Multibase
 *
 */


function decode(bufOrString) {
  if (Buffer.isBuffer(bufOrString)) {
    bufOrString = bufOrString.toString();
  }

  const code = bufOrString.substring(0, 1);
  bufOrString = bufOrString.substring(1, bufOrString.length);

  if (typeof bufOrString === 'string') {
    bufOrString = Buffer.from(bufOrString);
  }

  const base = getBase(code);
  return Buffer.from(base.decode(bufOrString.toString()));
}
/**
 * Is the given data multibase encoded?
 *
 * @param {Buffer|string} bufOrString
 * @returns {boolean}
 * @memberof Multibase
 */


function isEncoded(bufOrString) {
  if (Buffer.isBuffer(bufOrString)) {
    bufOrString = bufOrString.toString();
  } // Ensure bufOrString is a string


  if (Object.prototype.toString.call(bufOrString) !== '[object String]') {
    return false;
  }

  const code = bufOrString.substring(0, 1);

  try {
    const base = getBase(code);
    return base.name;
  } catch (err) {
    return false;
  }
}
/**
 * @param {string} name
 * @param {Buffer} buf
 * @private
 * @returns {undefined}
 */


function validEncode(name, buf) {
  const base = getBase(name);
  base.decode(buf.toString());
}

function getBase(nameOrCode) {
  let base;

  if (constants.names[nameOrCode]) {
    base = constants.names[nameOrCode];
  } else if (constants.codes[nameOrCode]) {
    base = constants.codes[nameOrCode];
  } else {
    throw errNotSupported;
  }

  if (!base.isImplemented()) {
    throw new Error('Base ' + nameOrCode + ' is not implemented yet');
  }

  return base;
}

/***/ }),
/* 3 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var g; // This works in non-strict mode

g = function () {
  return this;
}();

try {
  // This works if eval is allowed (see CSP)
  g = g || new Function("return this")();
} catch (e) {
  // This works if the window reference is available
  if (typeof window === "object") g = window;
} // g can still be undefined, but nothing to do about it...
// We return undefined, instead of nothing here, so it's
// easier to handle this case. if(!global) { ...}


module.exports = g;

/***/ }),
/* 4 */
/***/ (function(module, exports, __webpack_require__) {

"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;
} // Support decoding URL-safe base64 strings, as Node.js does.
// See: https://en.wikipedia.org/wiki/Base64#URL_applications


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

function getLens(b64) {
  var len = b64.length;

  if (len % 4 > 0) {
    throw new Error('Invalid string. Length must be a multiple of 4');
  } // Trim off extra bytes after placeholder bytes are found
  // See: https://github.com/beatgammit/base64-js/issues/42


  var validLen = b64.indexOf('=');
  if (validLen === -1) validLen = len;
  var placeHoldersLen = validLen === len ? 0 : 4 - validLen % 4;
  return [validLen, placeHoldersLen];
} // base64 is 4/3 + up to two characters of the original data


function byteLength(b64) {
  var lens = getLens(b64);
  var validLen = lens[0];
  var placeHoldersLen = lens[1];
  return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
}

function _byteLength(b64, validLen, placeHoldersLen) {
  return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
}

function toByteArray(b64) {
  var tmp;
  var lens = getLens(b64);
  var validLen = lens[0];
  var placeHoldersLen = lens[1];
  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen));
  var curByte = 0; // if there are placeholders, only get up to the last complete 4 chars

  var len = placeHoldersLen > 0 ? validLen - 4 : validLen;
  var i;

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

  if (placeHoldersLen === 2) {
    tmp = revLookup[b64.charCodeAt(i)] << 2 | revLookup[b64.charCodeAt(i + 1)] >> 4;
    arr[curByte++] = tmp & 0xFF;
  }

  if (placeHoldersLen === 1) {
    tmp = revLookup[b64.charCodeAt(i)] << 10 | revLookup[b64.charCodeAt(i + 1)] << 4 | revLookup[b64.charCodeAt(i + 2)] >> 2;
    arr[curByte++] = tmp >> 8 & 0xFF;
    arr[curByte++] = 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 & 0xFF0000) + (uint8[i + 1] << 8 & 0xFF00) + (uint8[i + 2] & 0xFF);
    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 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];
    parts.push(lookup[tmp >> 2] + lookup[tmp << 4 & 0x3F] + '==');
  } else if (extraBytes === 2) {
    tmp = (uint8[len - 2] << 8) + uint8[len - 1];
    parts.push(lookup[tmp >> 10] + lookup[tmp >> 4 & 0x3F] + lookup[tmp << 2 & 0x3F] + '=');
  }

  return parts.join('');
}

/***/ }),
/* 5 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


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;
};

/***/ }),
/* 6 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var toString = {}.toString;

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

/***/ }),
/* 7 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


const Base = __webpack_require__(8);

const baseX = __webpack_require__(9);

const base16 = __webpack_require__(11);

const base32 = __webpack_require__(12);

const base64 = __webpack_require__(13); // name, code, implementation, alphabet


const constants = [['base1', '1', '', '1'], ['base2', '0', baseX, '01'], ['base8', '7', baseX, '01234567'], ['base10', '9', baseX, '0123456789'], ['base16', 'f', base16, '0123456789abcdef'], ['base32', 'b', base32, 'abcdefghijklmnopqrstuvwxyz234567'], ['base32pad', 'c', base32, 'abcdefghijklmnopqrstuvwxyz234567='], ['base32hex', 'v', base32, '0123456789abcdefghijklmnopqrstuv'], ['base32hexpad', 't', base32, '0123456789abcdefghijklmnopqrstuv='], ['base32z', 'h', base32, 'ybndrfg8ejkmcpqxot1uwisza345h769'], ['base58flickr', 'Z', baseX, '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ'], ['base58btc', 'z', baseX, '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'], ['base64', 'm', base64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'], ['base64pad', 'M', base64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='], ['base64url', 'u', base64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_'], ['base64urlpad', 'U', base64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_=']];
const names = constants.reduce((prev, tupple) => {
  prev[tupple[0]] = new Base(tupple[0], tupple[1], tupple[2], tupple[3]);
  return prev;
}, {});
const codes = constants.reduce((prev, tupple) => {
  prev[tupple[1]] = names[tupple[0]];
  return prev;
}, {});
module.exports = {
  names: names,
  codes: codes
};

/***/ }),
/* 8 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


class Base {
  constructor(name, code, implementation, alphabet) {
    this.name = name;
    this.code = code;
    this.alphabet = alphabet;

    if (implementation && alphabet) {
      this.engine = implementation(alphabet);
    }
  }

  encode(stringOrBuffer) {
    return this.engine.encode(stringOrBuffer);
  }

  decode(stringOrBuffer) {
    return this.engine.decode(stringOrBuffer);
  }

  isImplemented() {
    return this.engine;
  }

}

module.exports = Base;

/***/ }),
/* 9 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";
 // base-x encoding / decoding
// Copyright (c) 2018 base-x contributors
// Copyright (c) 2014-2018 The Bitcoin Core developers (base58.cpp)
// Distributed under the MIT software license, see the accompanying
// file LICENSE or http://www.opensource.org/licenses/mit-license.php.
// @ts-ignore

var _Buffer = __webpack_require__(10).Buffer;

function base(ALPHABET) {
  if (ALPHABET.length >= 255) {
    throw new TypeError('Alphabet too long');
  }

  var BASE_MAP = new Uint8Array(256);

  for (var j = 0; j < BASE_MAP.length; j++) {
    BASE_MAP[j] = 255;
  }

  for (var i = 0; i < ALPHABET.length; i++) {
    var x = ALPHABET.charAt(i);
    var xc = x.charCodeAt(0);

    if (BASE_MAP[xc] !== 255) {
      throw new TypeError(x + ' is ambiguous');
    }

    BASE_MAP[xc] = i;
  }

  var BASE = ALPHABET.length;
  var LEADER = ALPHABET.charAt(0);
  var FACTOR = Math.log(BASE) / Math.log(256); // log(BASE) / log(256), rounded up

  var iFACTOR = Math.log(256) / Math.log(BASE); // log(256) / log(BASE), rounded up

  function encode(source) {
    if (Array.isArray(source) || source instanceof Uint8Array) {
      source = _Buffer.from(source);
    }

    if (!_Buffer.isBuffer(source)) {
      throw new TypeError('Expected Buffer');
    }

    if (source.length === 0) {
      return '';
    } // Skip & count leading zeroes.


    var zeroes = 0;
    var length = 0;
    var pbegin = 0;
    var pend = source.length;

    while (pbegin !== pend && source[pbegin] === 0) {
      pbegin++;
      zeroes++;
    } // Allocate enough space in big-endian base58 representation.


    var size = (pend - pbegin) * iFACTOR + 1 >>> 0;
    var b58 = new Uint8Array(size); // Process the bytes.

    while (pbegin !== pend) {
      var carry = source[pbegin]; // Apply "b58 = b58 * 256 + ch".

      var i = 0;

      for (var it1 = size - 1; (carry !== 0 || i < length) && it1 !== -1; it1--, i++) {
        carry += 256 * b58[it1] >>> 0;
        b58[it1] = carry % BASE >>> 0;
        carry = carry / BASE >>> 0;
      }

      if (carry !== 0) {
        throw new Error('Non-zero carry');
      }

      length = i;
      pbegin++;
    } // Skip leading zeroes in base58 result.


    var it2 = size - length;

    while (it2 !== size && b58[it2] === 0) {
      it2++;
    } // Translate the result into a string.


    var str = LEADER.repeat(zeroes);

    for (; it2 < size; ++it2) {
      str += ALPHABET.charAt(b58[it2]);
    }

    return str;
  }

  function decodeUnsafe(source) {
    if (typeof source !== 'string') {
      throw new TypeError('Expected String');
    }

    if (source.length === 0) {
      return _Buffer.alloc(0);
    }

    var psz = 0; // Skip leading spaces.

    if (source[psz] === ' ') {
      return;
    } // Skip and count leading '1's.


    var zeroes = 0;
    var length = 0;

    while (source[psz] === LEADER) {
      zeroes++;
      psz++;
    } // Allocate enough space in big-endian base256 representation.


    var size = (source.length - psz) * FACTOR + 1 >>> 0; // log(58) / log(256), rounded up.

    var b256 = new Uint8Array(size); // Process the characters.

    while (source[psz]) {
      // Decode character
      var carry = BASE_MAP[source.charCodeAt(psz)]; // Invalid character

      if (carry === 255) {
        return;
      }

      var i = 0;

      for (var it3 = size - 1; (carry !== 0 || i < length) && it3 !== -1; it3--, i++) {
        carry += BASE * b256[it3] >>> 0;
        b256[it3] = carry % 256 >>> 0;
        carry = carry / 256 >>> 0;
      }

      if (carry !== 0) {
        throw new Error('Non-zero carry');
      }

      length = i;
      psz++;
    } // Skip trailing spaces.


    if (source[psz] === ' ') {
      return;
    } // Skip leading zeroes in b256.


    var it4 = size - length;

    while (it4 !== size && b256[it4] === 0) {
      it4++;
    }

    var vch = _Buffer.allocUnsafe(zeroes + (size - it4));

    vch.fill(0x00, 0, zeroes);
    var j = zeroes;

    while (it4 !== size) {
      vch[j++] = b256[it4++];
    }

    return vch;
  }

  function decode(string) {
    var buffer = decodeUnsafe(string);

    if (buffer) {
      return buffer;
    }

    throw new Error('Non-base' + BASE + ' character');
  }

  return {
    encode: encode,
    decodeUnsafe: decodeUnsafe,
    decode: decode
  };
}

module.exports = base;

/***/ }),
/* 10 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


/* eslint-disable node/no-deprecated-api */
var buffer = __webpack_require__(0);

var Buffer = buffer.Buffer; // alternative to using Object.keys for old browsers

function copyProps(src, dst) {
  for (var key in src) {
    dst[key] = src[key];
  }
}

if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
  module.exports = buffer;
} else {
  // Copy properties from require('buffer')
  copyProps(buffer, exports);
  exports.Buffer = SafeBuffer;
}

function SafeBuffer(arg, encodingOrOffset, length) {
  return Buffer(arg, encodingOrOffset, length);
}

SafeBuffer.prototype = Object.create(Buffer.prototype); // Copy static methods from Buffer

copyProps(Buffer, SafeBuffer);

SafeBuffer.from = function (arg, encodingOrOffset, length) {
  if (typeof arg === 'number') {
    throw new TypeError('Argument must not be a number');
  }

  return Buffer(arg, encodingOrOffset, length);
};

SafeBuffer.alloc = function (size, fill, encoding) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number');
  }

  var buf = Buffer(size);

  if (fill !== undefined) {
    if (typeof encoding === 'string') {
      buf.fill(fill, encoding);
    } else {
      buf.fill(fill);
    }
  } else {
    buf.fill(0);
  }

  return buf;
};

SafeBuffer.allocUnsafe = function (size) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number');
  }

  return Buffer(size);
};

SafeBuffer.allocUnsafeSlow = function (size) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number');
  }

  return buffer.SlowBuffer(size);
};

/***/ }),
/* 11 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


const {
  Buffer
} = __webpack_require__(0);

module.exports = function base16(alphabet) {
  return {
    encode(input) {
      if (typeof input === 'string') {
        return Buffer.from(input).toString('hex');
      }

      return input.toString('hex');
    },

    decode(input) {
      for (const char of input) {
        if (alphabet.indexOf(char) < 0) {
          throw new Error('invalid base16 character');
        }
      }

      return Buffer.from(input, 'hex');
    }

  };
};

/***/ }),
/* 12 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


function decode(input, alphabet) {
  input = input.replace(new RegExp('=', 'g'), '');
  const length = input.length;
  let bits = 0;
  let value = 0;
  let index = 0;
  const output = new Uint8Array(length * 5 / 8 | 0);

  for (let i = 0; i < length; i++) {
    value = value << 5 | alphabet.indexOf(input[i]);
    bits += 5;

    if (bits >= 8) {
      output[index++] = value >>> bits - 8 & 255;
      bits -= 8;
    }
  }

  return output.buffer;
}

function encode(buffer, alphabet) {
  const length = buffer.byteLength;
  const view = new Uint8Array(buffer);
  const padding = alphabet.indexOf('=') === alphabet.length - 1;

  if (padding) {
    alphabet = alphabet.substring(0, alphabet.length - 1);
  }

  let bits = 0;
  let value = 0;
  let output = '';

  for (let i = 0; i < length; i++) {
    value = value << 8 | view[i];
    bits += 8;

    while (bits >= 5) {
      output += alphabet[value >>> bits - 5 & 31];
      bits -= 5;
    }
  }

  if (bits > 0) {
    output += alphabet[value << 5 - bits & 31];
  }

  if (padding) {
    while (output.length % 8 !== 0) {
      output += '=';
    }
  }

  return output;
}

module.exports = function base32(alphabet) {
  return {
    encode(input) {
      if (typeof input === 'string') {
        return encode(Uint8Array.from(input), alphabet);
      }

      return encode(input, alphabet);
    },

    decode(input) {
      for (const char of input) {
        if (alphabet.indexOf(char) < 0) {
          throw new Error('invalid base32 character');
        }
      }

      return decode(input, alphabet);
    }

  };
};

/***/ }),
/* 13 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


const {
  Buffer
} = __webpack_require__(0);

module.exports = function base64(alphabet) {
  // The alphabet is only used to know:
  //   1. If padding is enabled (must contain '=')
  //   2. If the output must be url-safe (must contain '-' and '_')
  //   3. If the input of the output function is valid
  // The alphabets from RFC 4648 are always used.
  const padding = alphabet.indexOf('=') > -1;
  const url = alphabet.indexOf('-') > -1 && alphabet.indexOf('_') > -1;
  return {
    encode(input) {
      let output = '';

      if (typeof input === 'string') {
        output = Buffer.from(input).toString('base64');
      } else {
        output = input.toString('base64');
      }

      if (url) {
        output = output.replace(/\+/g, '-').replace(/\//g, '_');
      }

      const pad = output.indexOf('=');

      if (pad > 0 && !padding) {
        output = output.substring(0, pad);
      }

      return output;
    },

    decode(input) {
      for (const char of input) {
        if (alphabet.indexOf(char) < 0) {
          throw new Error('invalid base64 character');
        }
      }

      return Buffer.from(input, 'base64');
    }

  };
};

/***/ })
/******/ ]);
});
//# sourceMappingURL=index.js.map