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 | 1× 1× 1× 1× 1× 263× 1× 263× 200× 263× 1× 18× 18× 18× 18× 1× 10× 10× 10× 10× 10× 1× 17× 17× 17× 17× 17× 1× 15× 15× 1× 56× 1× 56× 56× 2× 54× 1× 100× 100× 1× 19× 1× 16× 16× 16× 1× 16× 16× 1× 12× 12× 12× 12× 1× 44× 44× 1× | /* This file is part of web3.js. web3.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. web3.js is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 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 web3.js. If not, see <http://www.gnu.org/licenses/>. */ /** * @file formatters.js * @author Marek Kotewicz <marek@ethcore.io> * @author Fabian Vogelsteller <fabian@frozeman.de> * @date 2017 */ var _ = require('underscore'); var utils = require('web3-utils'); var BN = require('bn.js'); var SolidityParam = require('./param'); /** * 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 utils.toBN(number).toTwos(256).toString(16, 64); }; /** * Formats input value to byte representation of int * If value is negative, return it's two's complement * If the value is floating point, round it down * * @method formatInputInt * @param {String|Number|BN} value that needs to be formatted * @returns {SolidityParam} */ var formatInputInt = function (value) { if(_.isNumber(value)) { value = Math.trunc(value); } return new SolidityParam(toTwosComplement(value)); }; /** * Formats input bytes * * @method formatInputBytes * @param {String} value * @returns {SolidityParam} */ var formatInputBytes = function (value) { var result = value.replace(/^0x/i,''); var l = Math.floor((result.length + 63) / 64); result = utils.padRight(result, l * 64); return new SolidityParam(result); }; /** * Formats input bytes * * @method formatDynamicInputBytes * @param {String} value * @returns {SolidityParam} */ var formatInputDynamicBytes = function (value) { var result = value.replace(/^0x/i,''); var length = result.length / 2; var l = Math.floor((result.length + 63) / 64); result = utils.padRight(result, l * 64); return new SolidityParam(formatInputInt(length).value + result); }; /** * Formats input value to byte representation of string * * @method formatInputString * @param {String} * @returns {SolidityParam} */ var formatInputString = function (value) { var result = utils.utf8ToHex(value).replace(/^0x/i,''); var length = result.length / 2; var l = Math.floor((result.length + 63) / 64); result = utils.padRight(result, l * 64); return new SolidityParam(formatInputInt(length).value + result); }; /** * Formats input value to byte representation of bool * * @method formatInputBool * @param {Boolean} * @returns {SolidityParam} */ var formatInputBool = function (value) { var result = '000000000000000000000000000000000000000000000000000000000000000' + (value ? '1' : '0'); return new SolidityParam(result); }; /** * Check if input value is negative * * @method signedIsNegative * @param {String} value is hex format * @returns {Boolean} true if it is negative, otherwise false */ var signedIsNegative = function (value) { return (new BN(value.substr(0, 1), 16).toString(2).substr(0, 1)) === '1'; }; /** * Formats right-aligned output bytes to int * * @method formatOutputInt * @param {SolidityParam} param * @returns {BN} right-aligned output bytes formatted to big number */ var formatOutputInt = function (param) { var value = param.staticPart() || "0"; // check if it's negative number // it it is, return two's complement if (signedIsNegative(value)) { return new BN(value, 16).fromTwos(256).toString(10); } return new BN(value, 16).toString(10); }; /** * Formats right-aligned output bytes to uint * * @method formatOutputUInt * @param {SolidityParam} param * @returns {BN} right-aligned output bytes formatted to uint */ var formatOutputUInt = function (param) { var value = param.staticPart() || "0"; return new BN(value, 16).toString(10); }; /** * Should be used to format output bool * * @method formatOutputBool * @param {SolidityParam} param * @returns {Boolean} right-aligned input bytes formatted to bool */ var formatOutputBool = function (param) { return (param.staticPart() === '0000000000000000000000000000000000000000000000000000000000000001'); }; /** * Should be used to format output bytes * * @method formatOutputBytes * @param {SolidityParam} param left-aligned hex representation of string * @param {String} name type name * @returns {String} hex string */ var formatOutputBytes = function (param, name) { var matches = name.match(/^bytes([0-9]*)/); var size = parseInt(matches[1]); return '0x' + param.staticPart().slice(0, 2 * size); }; /** * Should be used to format output bytes * * @method formatOutputDynamicBytes * @param {SolidityParam} param left-aligned hex representation of string * @returns {String} hex string */ var formatOutputDynamicBytes = function (param) { var length = (new BN(param.dynamicPart().slice(0, 64), 16)).toNumber() * 2; return '0x' + param.dynamicPart().substr(64, length); }; /** * Should be used to format output string * * @method formatOutputString * @param {SolidityParam} left-aligned hex representation of string * @returns {String} ascii string */ var formatOutputString = function (param) { var hex = param.dynamicPart().slice(0, 64); Eif(hex) { var length = (new BN(hex, 16)).toNumber() * 2; return utils.hexToUtf8('0x'+ param.dynamicPart().substr(64, length).replace(/^0x/i, '')); } else { return "ERROR: Strings are not yet supported as return values"; } }; /** * Should be used to format output address * * @method formatOutputAddress * @param {Object} param right-aligned input bytes * @returns {String} address */ var formatOutputAddress = function (param) { var value = param.staticPart(); return utils.toChecksumAddress("0x" + value.slice(value.length - 40, value.length)); }; module.exports = { formatInputInt: formatInputInt, formatInputBytes: formatInputBytes, formatInputDynamicBytes: formatInputDynamicBytes, formatInputString: formatInputString, formatInputBool: formatInputBool, formatOutputInt: formatOutputInt, formatOutputUInt: formatOutputUInt, formatOutputBool: formatOutputBool, formatOutputBytes: formatOutputBytes, formatOutputDynamicBytes: formatOutputDynamicBytes, formatOutputString: formatOutputString, formatOutputAddress: formatOutputAddress, toTwosComplement: toTwosComplement }; |