Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 | 2x 2x 2x 2x 2x 2x 132x 2x 51x 2x 1895x 1895x 2x 373x 2x 1034x 94x 940x 336x 604x 2x 614x 614x 614x 23948x 17x 597x 2x 65x 65x 65x 65x 2x 79x 79x 79x 79x 2x 57x 57x 57x 57x 57x 57x 57x 1050x 1050x 1050x 57x 2x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 289x 289x 22x 2x 1487x 853x 634x 2x 8x 8x 2x 766x 766x 3x 763x 763x 763x 2x 2x 111x 111x 111x 111x 3073x 111x 2x 85x 4x 81x 12x 69x 2x 67x 41x 5x 36x 13x 23x 11x 38x 2x 3433x 2x 197x 2x 8x 8x 8x 2x 5x 5x 5x 2x 2x 3086x 89x 3086x 3086x 3086x 2x 2x | /*
This file is part of susyweb.js.
susyweb.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
susyweb.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MSRCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with susyweb.js. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file utils.js
* @author Fabian Vogelsteller <fabian@ethereum.org>
* @date 2017
*/
var _ = require('underscore');
var BN = require('bn.js');
var numberToBN = require('number-to-bn');
var utf8 = require('utf8');
var Hash = require("sof-lib/lib/hash");
/**
* Returns true if object is BN, otherwise false
*
* @method isBN
* @param {Object} object
* @return {Boolean}
*/
var isBN = function (object) {
return object instanceof BN ||
(object && object.constructor && object.constructor.name === 'BN');
};
/**
* Returns true if object is BigNumber, otherwise false
*
* @method isBigNumber
* @param {Object} object
* @return {Boolean}
*/
var isBigNumber = function (object) {
return object && object.constructor && object.constructor.name === 'BigNumber';
};
/**
* Takes an input and transforms it into an BN
*
* @method toBN
* @param {Number|String|BN} number, string, HEX string or BN
* @return {BN} BN
*/
var toBN = function(number){
try {
return numberToBN.apply(null, arguments);
} catch(e) {
throw new Error(e + ' Given value: "'+ number +'"');
}
};
/**
* Takes and input transforms it into BN and if it is negative value, into two's complement
*
* @method toTwosComplement
* @param {Number|String|BN} number
* @return {String}
*/
var toTwosComplement = function (number) {
return '0x'+ toBN(number).toTwos(256).toString(16, 64);
};
/**
* Checks if the given string is an address
*
* @method isAddress
* @param {String} address the given HEX address
* @return {Boolean}
*/
var isAddress = function (address) {
// check if it has the basic requirements of an address
if (!/^(0x)?[0-9a-f]{40}$/i.test(address)) {
return false;
// If it's ALL lowercase or ALL upppercase
} else if (/^(0x|0X)?[0-9a-f]{40}$/.test(address) || /^(0x|0X)?[0-9A-F]{40}$/.test(address)) {
return true;
// Otherwise check each case
} else {
return checkAddressChecksum(address);
}
};
/**
* Checks if the given string is a checksummed address
*
* @method checkAddressChecksum
* @param {String} address the given HEX address
* @return {Boolean}
*/
var checkAddressChecksum = function (address) {
// Check each case
address = address.replace(/^0x/i,'');
var addressHash = sha3(address.toLowerCase()).replace(/^0x/i,'');
for (var i = 0; i < 40; i++ ) {
// the nth letter should be uppercase if the nth digit of casemap is 1
if ((parseInt(addressHash[i], 16) > 7 && address[i].toUpperCase() !== address[i]) || (parseInt(addressHash[i], 16) <= 7 && address[i].toLowerCase() !== address[i])) {
return false;
}
}
return true;
};
/**
* Should be called to pad string to expected length
*
* @method leftPad
* @param {String} string to be padded
* @param {Number} chars that result string should have
* @param {String} sign, by default 0
* @returns {String} right aligned string
*/
var leftPad = function (string, chars, sign) {
var hasPrefix = /^0x/i.test(string) || typeof string === 'number';
string = string.toString(16).replace(/^0x/i,'');
var padding = (chars - string.length + 1 >= 0) ? chars - string.length + 1 : 0;
return (hasPrefix ? '0x' : '') + new Array(padding).join(sign ? sign : "0") + string;
};
/**
* Should be called to pad string to expected length
*
* @method rightPad
* @param {String} string to be padded
* @param {Number} chars that result string should have
* @param {String} sign, by default 0
* @returns {String} right aligned string
*/
var rightPad = function (string, chars, sign) {
var hasPrefix = /^0x/i.test(string) || typeof string === 'number';
string = string.toString(16).replace(/^0x/i,'');
var padding = (chars - string.length + 1 >= 0) ? chars - string.length + 1 : 0;
return (hasPrefix ? '0x' : '') + string + (new Array(padding).join(sign ? sign : "0"));
};
/**
* Should be called to get hex representation (prefixed by 0x) of utf8 string
*
* @method utf8ToHex
* @param {String} str
* @returns {String} hex representation of input string
*/
var utf8ToHex = function(str) {
str = utf8.encode(str);
var hex = "";
// remove \u0000 padding from either side
str = str.replace(/^(?:\u0000)*/,'');
str = str.split("").reverse().join("");
str = str.replace(/^(?:\u0000)*/,'');
str = str.split("").reverse().join("");
for(var i = 0; i < str.length; i++) {
var code = str.charCodeAt(i);
// if (code !== 0) {
var n = code.toString(16);
hex += n.length < 2 ? '0' + n : n;
// }
}
return "0x" + hex;
};
/**
* Should be called to get utf8 from it's hex representation
*
* @method hexToUtf8
* @param {String} hex
* @returns {String} ascii string representation of hex value
*/
var hexToUtf8 = function(hex) {
Iif (!isHexStrict(hex))
throw new Error('The parameter "'+ hex +'" must be a valid HEX string.');
var str = "";
var code = 0;
hex = hex.replace(/^0x/i,'');
// remove 00 padding from either side
hex = hex.replace(/^(?:00)*/,'');
hex = hex.split("").reverse().join("");
hex = hex.replace(/^(?:00)*/,'');
hex = hex.split("").reverse().join("");
var l = hex.length;
for (var i=0; i < l; i+=2) {
code = parseInt(hex.substr(i, 2), 16);
// if (code !== 0) {
str += String.fromCharCode(code);
// }
}
return utf8.decode(str);
};
/**
* Converts value to it's number representation
*
* @method hexToNumber
* @param {String|Number|BN} value
* @return {String}
*/
var hexToNumber = function (value) {
if (!value) {
return value;
}
return toBN(value).toNumber();
};
/**
* Converts value to it's decimal representation in string
*
* @method hexToNumberString
* @param {String|Number|BN} value
* @return {String}
*/
var hexToNumberString = function (value) {
Iif (!value) return value;
return toBN(value).toString(10);
};
/**
* Converts value to it's hex representation
*
* @method numberToHex
* @param {String|Number|BN} value
* @return {String}
*/
var numberToHex = function (value) {
Iif (_.isNull(value) || _.isUndefined(value)) {
return value;
}
if (!isFinite(value) && !isHexStrict(value)) {
throw new Error('Given input "'+value+'" is not a number.');
}
var number = toBN(value);
var result = number.toString(16);
return number.lt(new BN(0)) ? '-0x' + result.substr(1) : '0x' + result;
};
/**
* Convert a byte array to a hex string
*
* Note: Implementation from crypto-js
*
* @method bytesToHex
* @param {Array} bytes
* @return {String} the hex string
*/
var bytesToHex = function(bytes) {
for (var hex = [], i = 0; i < bytes.length; i++) {
// eslint-disable-next-line no-bitwise
hex.push((bytes[i] >>> 4).toString(16));
// eslint-disable-next-line no-bitwise
hex.push((bytes[i] & 0xF).toString(16));
}
return '0x'+ hex.join("");
};
/**
* Convert a hex string to a byte array
*
* Note: Implementation from crypto-js
*
* @method hexToBytes
* @param {string} hex
* @return {Array} the byte array
*/
var hexToBytes = function(hex) {
hex = hex.toString(16);
Iif (!isHexStrict(hex)) {
throw new Error('Given value "'+ hex +'" is not a valid hex string.');
}
hex = hex.replace(/^0x/i,'');
for (var bytes = [], c = 0; c < hex.length; c += 2)
bytes.push(parseInt(hex.substr(c, 2), 16));
return bytes;
};
/**
* Auto converts any given value into it's hex representation.
*
* And even stringifys objects before.
*
* @method toHex
* @param {String|Number|BN|Object} value
* @param {Boolean} returnType
* @return {String}
*/
/* eslint-disable complexity */
var toHex = function (value, returnType) {
if (isAddress(value)) {
return returnType ? 'address' : '0x'+ value.toLowerCase().replace(/^0x/i,'');
}
if (_.isBoolean(value)) {
return returnType ? 'bool' : value ? '0x01' : '0x00';
}
if (_.isObject(value) && !isBigNumber(value) && !isBN(value)) {
return returnType ? 'string' : utf8ToHex(JSON.stringify(value));
}
// if its a negative number, pass it through numberToHex
if (_.isString(value)) {
if (value.indexOf('-0x') === 0 || value.indexOf('-0X') === 0) {
return returnType ? 'int256' : numberToHex(value);
} else if(value.indexOf('0x') === 0 || value.indexOf('0X') === 0) {
return returnType ? 'bytes' : value;
} else if (!isFinite(value)) {
return returnType ? 'string' : utf8ToHex(value);
}
}
return returnType ? (value < 0 ? 'int256' : 'uint256') : numberToHex(value);
};
/* eslint-enable complexity */
/**
* Check if string is HEX, requires a 0x in front
*
* @method isHexStrict
* @param {String} hex to be checked
* @returns {Boolean}
*/
var isHexStrict = function (hex) {
return ((_.isString(hex) || _.isNumber(hex)) && /^(-)?0x[0-9a-f]*$/i.test(hex));
};
/**
* Check if string is HEX
*
* @method isHex
* @param {String} hex to be checked
* @returns {Boolean}
*/
var isHex = function (hex) {
return ((_.isString(hex) || _.isNumber(hex)) && /^(-0x|0x)?[0-9a-f]*$/i.test(hex));
};
/**
* Returns true if given string is a valid Sophon block header bloom.
*
* TODO UNDOCUMENTED
*
* @method isBloom
* @param {String} hex encoded bloom filter
* @return {Boolean}
*/
var isBloom = function (bloom) {
Iif (!/^(0x)?[0-9a-f]{512}$/i.test(bloom)) {
return false;
} else Eif (/^(0x)?[0-9a-f]{512}$/.test(bloom) || /^(0x)?[0-9A-F]{512}$/.test(bloom)) {
return true;
}
return false;
};
/**
* Returns true if given string is a valid log topic.
*
* TODO UNDOCUMENTED
*
* @method isTopic
* @param {String} hex encoded topic
* @return {Boolean}
*/
var isTopic = function (topic) {
Iif (!/^(0x)?[0-9a-f]{64}$/i.test(topic)) {
return false;
} else Eif (/^(0x)?[0-9a-f]{64}$/.test(topic) || /^(0x)?[0-9A-F]{64}$/.test(topic)) {
return true;
}
return false;
};
/**
* Hashes values to a sha3 hash using keccak 256
*
* To hash a HEX string the hex must have 0x in front.
*
* @method sha3
* @return {String} the sha3 string
*/
var SHA3_NULL_S = '0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470';
var sha3 = function (value) {
if (isHexStrict(value) && /^0x/i.test((value).toString())) {
value = hexToBytes(value);
}
var returnValue = Hash.keccak256(value);
Iif(returnValue === SHA3_NULL_S) {
return null;
} else {
return returnValue;
}
};
// expose the under the hood keccak256
sha3._Hash = Hash;
module.exports = {
BN: BN,
isBN: isBN,
isBigNumber: isBigNumber,
toBN: toBN,
isAddress: isAddress,
isBloom: isBloom, // TODO UNDOCUMENTED
isTopic: isTopic, // TODO UNDOCUMENTED
checkAddressChecksum: checkAddressChecksum,
utf8ToHex: utf8ToHex,
hexToUtf8: hexToUtf8,
hexToNumber: hexToNumber,
hexToNumberString: hexToNumberString,
numberToHex: numberToHex,
toHex: toHex,
hexToBytes: hexToBytes,
bytesToHex: bytesToHex,
isHex: isHex,
isHexStrict: isHexStrict,
leftPad: leftPad,
rightPad: rightPad,
toTwosComplement: toTwosComplement,
sha3: sha3
};
|