@terminusbet/stake-vote-sdk/dist/browser/index.js

A simple SDK for interacting with terminusbet governance

import { PublicKey, SendTransactionError, SystemProgram, TransactionInstruction, Transaction, ComputeBudgetProgram, TransactionMessage, VersionedTransaction } from '@solana/web3.js';
import * as borsh from '@coral-xyz/borsh';
import { struct as struct$1, u64 as u64$1, publicKey as publicKey$3, u8 as u8$1, vec, bool, str } from '@coral-xyz/borsh';
import { getAssociatedTokenAddressSync, createAssociatedTokenAccountInstruction } from '@solana/spl-token';

const STAKE_MINT_AUTHORITY_SEED = "stake-mint-authority";
const APP_CONFIG_SEED = "app-config";
const STAKE_STATE_SEED = "stake-state";
const USER_VOTE_STATE_SEED = "user-vote-state";
const VOTE_STATE_SEED = "vote-state";
const STAKE_REWARD_SEED = "stake-reward";
const USER_REWARD_SEED = "user-reward";
const USER_ACTIVE_BALLOT_BOX_SEED = "user-active-ballot-box";
const ACTIVE_BALLOT_BOX_SEED = "active-ballot-box";
const DEFAULT_VOUCHER_TOKEN_DEMICAL = 6;
const DEFAULT_DEMICAL = 9;
const DENOMINATOR = 10000n;

var commonjsGlobal$1 = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

function getDefaultExportFromCjs (x) {
	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}

function getAugmentedNamespace(n) {
  if (n.__esModule) return n;
  var f = n.default;
	if (typeof f == "function") {
		var a = function a () {
			if (this instanceof a) {
        return Reflect.construct(f, arguments, this.constructor);
			}
			return f.apply(this, arguments);
		};
		a.prototype = f.prototype;
  } else a = {};
  Object.defineProperty(a, '__esModule', {value: true});
	Object.keys(n).forEach(function (k) {
		var d = Object.getOwnPropertyDescriptor(n, k);
		Object.defineProperty(a, k, d.get ? d : {
			enumerable: true,
			get: function () {
				return n[k];
			}
		});
	});
	return a;
}

var buffer = {};

var base64Js = {};

base64Js.byteLength = byteLength;
base64Js.toByteArray = toByteArray;
base64Js.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('')
}

var ieee754 = {};

/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */

ieee754.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)
};

ieee754.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;
};

/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <https://feross.org>
 * @license  MIT
 */

(function (exports) {

	const base64 = base64Js;
	const ieee754$1 = ieee754;
	const customInspectSymbol =
	  (typeof Symbol === 'function' && typeof Symbol['for'] === 'function') // eslint-disable-line dot-notation
	    ? Symbol['for']('nodejs.util.inspect.custom') // eslint-disable-line dot-notation
	    : null;

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

	const K_MAX_LENGTH = 0x7fffffff;
	exports.kMaxLength = K_MAX_LENGTH;

	/**
	 * If `Buffer.TYPED_ARRAY_SUPPORT`:
	 *   === true    Use Uint8Array implementation (fastest)
	 *   === false   Print warning and recommend using `buffer` v4.x which has an 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+.
	 *
	 * We report that the browser does not support typed arrays if the are not subclassable
	 * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
	 * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
	 * for __proto__ and has a buggy typed array implementation.
	 */
	Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport();

	if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
	    typeof console.error === 'function') {
	  console.error(
	    'This browser lacks typed array (Uint8Array) support which is required by ' +
	    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
	  );
	}

	function typedArraySupport () {
	  // Can typed array instances can be augmented?
	  try {
	    const arr = new Uint8Array(1);
	    const proto = { foo: function () { return 42 } };
	    Object.setPrototypeOf(proto, Uint8Array.prototype);
	    Object.setPrototypeOf(arr, proto);
	    return arr.foo() === 42
	  } catch (e) {
	    return false
	  }
	}

	Object.defineProperty(Buffer.prototype, 'parent', {
	  enumerable: true,
	  get: function () {
	    if (!Buffer.isBuffer(this)) return undefined
	    return this.buffer
	  }
	});

	Object.defineProperty(Buffer.prototype, 'offset', {
	  enumerable: true,
	  get: function () {
	    if (!Buffer.isBuffer(this)) return undefined
	    return this.byteOffset
	  }
	});

	function createBuffer (length) {
	  if (length > K_MAX_LENGTH) {
	    throw new RangeError('The value "' + length + '" is invalid for option "size"')
	  }
	  // Return an augmented `Uint8Array` instance
	  const buf = new Uint8Array(length);
	  Object.setPrototypeOf(buf, Buffer.prototype);
	  return buf
	}

	/**
	 * 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) {
	  // Common case.
	  if (typeof arg === 'number') {
	    if (typeof encodingOrOffset === 'string') {
	      throw new TypeError(
	        'The "string" argument must be of type string. Received type number'
	      )
	    }
	    return allocUnsafe(arg)
	  }
	  return from(arg, encodingOrOffset, length)
	}

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

	function from (value, encodingOrOffset, length) {
	  if (typeof value === 'string') {
	    return fromString(value, encodingOrOffset)
	  }

	  if (ArrayBuffer.isView(value)) {
	    return fromArrayView(value)
	  }

	  if (value == null) {
	    throw new TypeError(
	      'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
	      'or Array-like Object. Received type ' + (typeof value)
	    )
	  }

	  if (isInstance(value, ArrayBuffer) ||
	      (value && isInstance(value.buffer, ArrayBuffer))) {
	    return fromArrayBuffer(value, encodingOrOffset, length)
	  }

	  if (typeof SharedArrayBuffer !== 'undefined' &&
	      (isInstance(value, SharedArrayBuffer) ||
	      (value && isInstance(value.buffer, SharedArrayBuffer)))) {
	    return fromArrayBuffer(value, encodingOrOffset, length)
	  }

	  if (typeof value === 'number') {
	    throw new TypeError(
	      'The "value" argument must not be of type number. Received type number'
	    )
	  }

	  const valueOf = value.valueOf && value.valueOf();
	  if (valueOf != null && valueOf !== value) {
	    return Buffer.from(valueOf, encodingOrOffset, length)
	  }

	  const b = fromObject(value);
	  if (b) return b

	  if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
	      typeof value[Symbol.toPrimitive] === 'function') {
	    return Buffer.from(value[Symbol.toPrimitive]('string'), encodingOrOffset, length)
	  }

	  throw new TypeError(
	    'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
	    'or Array-like Object. Received type ' + (typeof 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(value, encodingOrOffset, length)
	};

	// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
	// https://github.com/feross/buffer/pull/148
	Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype);
	Object.setPrototypeOf(Buffer, Uint8Array);

	function assertSize (size) {
	  if (typeof size !== 'number') {
	    throw new TypeError('"size" argument must be of type number')
	  } else if (size < 0) {
	    throw new RangeError('The value "' + size + '" is invalid for option "size"')
	  }
	}

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

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

	function allocUnsafe (size) {
	  assertSize(size);
	  return createBuffer(size < 0 ? 0 : checked(size) | 0)
	}

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

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

	  if (!Buffer.isEncoding(encoding)) {
	    throw new TypeError('Unknown encoding: ' + encoding)
	  }

	  const length = byteLength(string, encoding) | 0;
	  let buf = createBuffer(length);

	  const actual = buf.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')
	    buf = buf.slice(0, actual);
	  }

	  return buf
	}

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

	function fromArrayView (arrayView) {
	  if (isInstance(arrayView, Uint8Array)) {
	    const copy = new Uint8Array(arrayView);
	    return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength)
	  }
	  return fromArrayLike(arrayView)
	}

	function fromArrayBuffer (array, byteOffset, length) {
	  if (byteOffset < 0 || array.byteLength < byteOffset) {
	    throw new RangeError('"offset" is outside of buffer bounds')
	  }

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

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

	  // Return an augmented `Uint8Array` instance
	  Object.setPrototypeOf(buf, Buffer.prototype);

	  return buf
	}

	function fromObject (obj) {
	  if (Buffer.isBuffer(obj)) {
	    const len = checked(obj.length) | 0;
	    const buf = createBuffer(len);

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

	    obj.copy(buf, 0, 0, len);
	    return buf
	  }

	  if (obj.length !== undefined) {
	    if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
	      return createBuffer(0)
	    }
	    return fromArrayLike(obj)
	  }

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

	function checked (length) {
	  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
	  // length is NaN (which is otherwise coerced to zero.)
	  if (length >= K_MAX_LENGTH) {
	    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
	                         'size: 0x' + K_MAX_LENGTH.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 === true &&
	    b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
	};

	Buffer.compare = function compare (a, b) {
	  if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength);
	  if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength);
	  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
	    throw new TypeError(
	      'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
	    )
	  }

	  if (a === b) return 0

	  let x = a.length;
	  let y = b.length;

	  for (let 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 (!Array.isArray(list)) {
	    throw new TypeError('"list" argument must be an Array of Buffers')
	  }

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

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

	  const buffer = Buffer.allocUnsafe(length);
	  let pos = 0;
	  for (i = 0; i < list.length; ++i) {
	    let buf = list[i];
	    if (isInstance(buf, Uint8Array)) {
	      if (pos + buf.length > buffer.length) {
	        if (!Buffer.isBuffer(buf)) buf = Buffer.from(buf);
	        buf.copy(buffer, pos);
	      } else {
	        Uint8Array.prototype.set.call(
	          buffer,
	          buf,
	          pos
	        );
	      }
	    } else if (!Buffer.isBuffer(buf)) {
	      throw new TypeError('"list" argument must be an Array of Buffers')
	    } else {
	      buf.copy(buffer, pos);
	    }
	    pos += buf.length;
	  }
	  return buffer
	};

	function byteLength (string, encoding) {
	  if (Buffer.isBuffer(string)) {
	    return string.length
	  }
	  if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
	    return string.byteLength
	  }
	  if (typeof string !== 'string') {
	    throw new TypeError(
	      'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
	      'Received type ' + typeof string
	    )
	  }

	  const len = string.length;
	  const mustMatch = (arguments.length > 2 && arguments[2] === true);
	  if (!mustMatch && len === 0) return 0

	  // Use a for loop to avoid recursion
	  let loweredCase = false;
	  for (;;) {
	    switch (encoding) {
	      case 'ascii':
	      case 'latin1':
	      case 'binary':
	        return len
	      case 'utf8':
	      case 'utf-8':
	        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 mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
	        }
	        encoding = ('' + encoding).toLowerCase();
	        loweredCase = true;
	    }
	  }
	}
	Buffer.byteLength = byteLength;

	function slowToString (encoding, start, end) {
	  let 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 coercion 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;
	    }
	  }
	}

	// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
	// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
	// reliably in a browserify context because there could be multiple different
	// copies of the 'buffer' package in use. This method works even for Buffer
	// instances that were created from another copy of the `buffer` package.
	// See: https://github.com/feross/buffer/issues/154
	Buffer.prototype._isBuffer = true;

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

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

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

	Buffer.prototype.swap64 = function swap64 () {
	  const len = this.length;
	  if (len % 8 !== 0) {
	    throw new RangeError('Buffer size must be a multiple of 64-bits')
	  }
	  for (let 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 () {
	  const length = this.length;
	  if (length === 0) return ''
	  if (arguments.length === 0) return utf8Slice(this, 0, length)
	  return slowToString.apply(this, arguments)
	};

	Buffer.prototype.toLocaleString = Buffer.prototype.toString;

	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 () {
	  let str = '';
	  const max = exports.INSPECT_MAX_BYTES;
	  str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim();
	  if (this.length > max) str += ' ... ';
	  return '<Buffer ' + str + '>'
	};
	if (customInspectSymbol) {
	  Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect;
	}

	Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
	  if (isInstance(target, Uint8Array)) {
	    target = Buffer.from(target, target.offset, target.byteLength);
	  }
	  if (!Buffer.isBuffer(target)) {
	    throw new TypeError(
	      'The "target" argument must be one of type Buffer or Uint8Array. ' +
	      'Received type ' + (typeof target)
	    )
	  }

	  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

	  let x = thisEnd - thisStart;
	  let y = end - start;
	  const len = Math.min(x, y);

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

	  for (let 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 < -2147483648) {
	    byteOffset = -2147483648;
	  }
	  byteOffset = +byteOffset; // Coerce to Number.
	  if (numberIsNaN(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 (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) {
	  let indexSize = 1;
	  let arrLength = arr.length;
	  let 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)
	    }
	  }

	  let i;
	  if (dir) {
	    let 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--) {
	      let found = true;
	      for (let 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;
	  const remaining = buf.length - offset;
	  if (!length) {
	    length = remaining;
	  } else {
	    length = Number(length);
	    if (length > remaining) {
	      length = remaining;
	    }
	  }

	  const strLen = string.length;

	  if (length > strLen / 2) {
	    length = strLen / 2;
	  }
	  let i;
	  for (i = 0; i < length; ++i) {
	    const parsed = parseInt(string.substr(i * 2, 2), 16);
	    if (numberIsNaN(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 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;
	    }
	  } else {
	    throw new Error(
	      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
	    )
	  }

	  const 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';

	  let 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':
	      case 'latin1':
	      case 'binary':
	        return asciiWrite(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);
	  const res = [];

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

	    if (i + bytesPerSequence <= end) {
	      let 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
	const MAX_ARGUMENTS_LENGTH = 0x1000;

	function decodeCodePointsArray (codePoints) {
	  const 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".
	  let res = '';
	  let i = 0;
	  while (i < len) {
	    res += String.fromCharCode.apply(
	      String,
	      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
	    );
	  }
	  return res
	}

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

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

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

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

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

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

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

	function utf16leSlice (buf, start, end) {
	  const bytes = buf.slice(start, end);
	  let res = '';
	  // If bytes.length is odd, the last 8 bits must be ignored (same as node.js)
	  for (let i = 0; i < bytes.length - 1; i += 2) {
	    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256));
	  }
	  return res
	}

	Buffer.prototype.slice = function slice (start, end) {
	  const 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;

	  const newBuf = this.subarray(start, end);
	  // Return an augmented `Uint8Array` instance
	  Object.setPrototypeOf(newBuf, Buffer.prototype);

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

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

	  return val
	};

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

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

	  return val
	};

	Buffer.prototype.readUint8 =
	Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 1, this.length);
	  return this[offset]
	};

	Buffer.prototype.readUint16LE =
	Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 2, this.length);
	  return this[offset] | (this[offset + 1] << 8)
	};

	Buffer.prototype.readUint16BE =
	Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 2, this.length);
	  return (this[offset] << 8) | this[offset + 1]
	};

	Buffer.prototype.readUint32LE =
	Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
	  offset = offset >>> 0;
	  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 =
	Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 4, this.length);

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

	Buffer.prototype.readBigUInt64LE = defineBigIntMethod(function readBigUInt64LE (offset) {
	  offset = offset >>> 0;
	  validateNumber(offset, 'offset');
	  const first = this[offset];
	  const last = this[offset + 7];
	  if (first === undefined || last === undefined) {
	    boundsError(offset, this.length - 8);
	  }

	  const lo = first +
	    this[++offset] * 2 ** 8 +
	    this[++offset] * 2 ** 16 +
	    this[++offset] * 2 ** 24;

	  const hi = this[++offset] +
	    this[++offset] * 2 ** 8 +
	    this[++offset] * 2 ** 16 +
	    last * 2 ** 24;

	  return BigInt(lo) + (BigInt(hi) << BigInt(32))
	});

	Buffer.prototype.readBigUInt64BE = defineBigIntMethod(function readBigUInt64BE (offset) {
	  offset = offset >>> 0;
	  validateNumber(offset, 'offset');
	  const first = this[offset];
	  const last = this[offset + 7];
	  if (first === undefined || last === undefined) {
	    boundsError(offset, this.length - 8);
	  }

	  const hi = first * 2 ** 24 +
	    this[++offset] * 2 ** 16 +
	    this[++offset] * 2 ** 8 +
	    this[++offset];

	  const lo = this[++offset] * 2 ** 24 +
	    this[++offset] * 2 ** 16 +
	    this[++offset] * 2 ** 8 +
	    last;

	  return (BigInt(hi) << BigInt(32)) + BigInt(lo)
	});

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

	  let val = this[offset];
	  let mul = 1;
	  let 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);

	  let i = byteLength;
	  let mul = 1;
	  let 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) {
	  offset = offset >>> 0;
	  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) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 2, this.length);
	  const val = this[offset] | (this[offset + 1] << 8);
	  return (val & 0x8000) ? val | 0xFFFF0000 : val
	};

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

	Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
	  offset = offset >>> 0;
	  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) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 4, this.length);

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

	Buffer.prototype.readBigInt64LE = defineBigIntMethod(function readBigInt64LE (offset) {
	  offset = offset >>> 0;
	  validateNumber(offset, 'offset');
	  const first = this[offset];
	  const last = this[offset + 7];
	  if (first === undefined || last === undefined) {
	    boundsError(offset, this.length - 8);
	  }

	  const val = this[offset + 4] +
	    this[offset + 5] * 2 ** 8 +
	    this[offset + 6] * 2 ** 16 +
	    (last << 24); // Overflow

	  return (BigInt(val) << BigInt(32)) +
	    BigInt(first +
	    this[++offset] * 2 ** 8 +
	    this[++offset] * 2 ** 16 +
	    this[++offset] * 2 ** 24)
	});

	Buffer.prototype.readBigInt64BE = defineBigIntMethod(function readBigInt64BE (offset) {
	  offset = offset >>> 0;
	  validateNumber(offset, 'offset');
	  const first = this[offset];
	  const last = this[offset + 7];
	  if (first === undefined || last === undefined) {
	    boundsError(offset, this.length - 8);
	  }

	  const val = (first << 24) + // Overflow
	    this[++offset] * 2 ** 16 +
	    this[++offset] * 2 ** 8 +
	    this[++offset];

	  return (BigInt(val) << BigInt(32)) +
	    BigInt(this[++offset] * 2 ** 24 +
	    this[++offset] * 2 ** 16 +
	    this[++offset] * 2 ** 8 +
	    last)
	});

	Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 4, this.length);
	  return ieee754$1.read(this, offset, true, 23, 4)
	};

	Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 4, this.length);
	  return ieee754$1.read(this, offset, false, 23, 4)
	};

	Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 8, this.length);
	  return ieee754$1.read(this, offset, true, 52, 8)
	};

	Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
	  offset = offset >>> 0;
	  if (!noAssert) checkOffset(offset, 8, this.length);
	  return ieee754$1.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 =
	Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
	  value = +value;
	  offset = offset >>> 0;
	  byteLength = byteLength >>> 0;
	  if (!noAssert) {
	    const maxBytes = Math.pow(2, 8 * byteLength) - 1;
	    checkInt(this, value, offset, byteLength, maxBytes, 0);
	  }

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

	  return offset + byteLength
	};

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

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

	  return offset + byteLength
	};

	Buffer.prototype.writeUint8 =
	Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
	  value = +value;
	  offset = offset >>> 0;
	  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0);
	  this[offset] = (value & 0xff);
	  return offset + 1
	};

	Buffer.prototype.writeUint16LE =
	Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
	  value = +value;
	  offset = offset >>> 0;
	  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);
	  this[offset] = (value & 0xff);
	  this[offset + 1] = (value >>> 8);
	  return offset + 2
	};

	Buffer.prototype.writeUint16BE =
	Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
	  value = +value;
	  offset = offset >>> 0;
	  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);
	  this[offset] = (value >>> 8);
	  this[offset + 1] = (value & 0xff);
	  return offset + 2
	};

	Buffer.prototype.writeUint32LE =
	Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset,