| 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 |
3×
3×
3×
3×
3×
3×
10×
10×
10×
1×
10×
10×
3×
10×
10×
7×
7×
10×
3×
343×
725×
343×
3×
3×
3×
3×
3×
3×
3×
97×
97×
3×
3×
3×
3×
97×
97×
97×
3×
3×
41×
41×
1×
40×
3×
12×
12×
3×
29×
28×
3×
310×
308×
308×
308×
308×
308×
12320×
6188×
6132×
308×
3×
| /*
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 utils.js
* @author Marek Kotewicz <marek@ethcore.io>
* @author Fabian Vogelsteller <fabian@ethereum.org>
* @date 2017
*/
var _ = require('underscore');
var ethjsUnit = require('ethjs-unit');
var utils = require('./utils.js');
var soliditySha3 = require('./soliditySha3.js');
var randomHex = require('randomhex');
/**
* Fires an error in an event emitter and callback and returns the eventemitter
*
* @method _fireError
* @param {Object} error a string, a error, or an object with {message, data}
* @param {Object} emitter
* @param {Function} reject
* @param {Function} callback
* @return {Object} the emitter
*/
var _fireError = function (error, emitter, reject, callback) {
/*jshint maxcomplexity: 10 */
// add data if given
Iif(_.isObject(error) && !(error instanceof Error) && error.data) {
if(_.isObject(error.data) || _.isArray(error.data)) {
error.data = JSON.stringify(error.data, null, 2);
}
error = error.message +"\n"+ error.data;
}
Iif(_.isString(error)) {
error = new Error(error);
}
if (_.isFunction(callback)) {
callback(error);
}
Eif (_.isFunction(reject)) {
// suppress uncatched error if an error listener is present
if(emitter &&
_.isFunction(emitter.listeners) &&
emitter.listeners('error').length &&
_.isFunction(emitter.suppressUnhandledRejections)) {
emitter.suppressUnhandledRejections();
}
reject(error);
}
if(emitter && _.isFunction(emitter.emit)) {
emitter.emit('error', error);
emitter.removeAllListeners();
}
return emitter;
};
/**
* Should be used to create full function/event name from json abi
*
* @method _jsonInterfaceMethodToString
* @param {Object} json
* @return {String} full function/event name
*/
var _jsonInterfaceMethodToString = function (json) {
Iif (_.isObject(json) && json.name && json.name.indexOf('(') !== -1) {
return json.name;
}
var typeName = json.inputs.map(function(i){return i.type; }).join(',');
return json.name + '(' + typeName + ')';
};
/**
* Should be called to get ascii from it's hex representation
*
* @method hexToAscii
* @param {String} hex
* @returns {String} ascii string representation of hex value
*/
var hexToAscii = function(hex) {
Iif (!utils.isHex(hex))
throw new Error('The parameter must be a valid HEX string.');
var str = "";
var i = 0, l = hex.length;
Eif (hex.substring(0, 2) === '0x') {
i = 2;
}
for (; i < l; i+=2) {
var code = parseInt(hex.substr(i, 2), 16);
str += String.fromCharCode(code);
}
return str;
};
/**
* Should be called to get hex representation (prefixed by 0x) of ascii string
*
* @method asciiToHex
* @param {String} str
* @returns {String} hex representation of input string
*/
var asciiToHex = function(str) {
var hex = "";
for(var i = 0; i < str.length; i++) {
var code = str.charCodeAt(i);
var n = code.toString(16);
hex += n.length < 2 ? '0' + n : n;
}
return "0x" + hex;
};
/**
* Returns value of unit in Wei
*
* @method getUnitValue
* @param {String} unit the unit to convert to, default ether
* @returns {BN} value of the unit (in Wei)
* @throws error if the unit is not correct:w
*/
var getUnitValue = function (unit) {
unit = unit ? unit.toLowerCase() : 'ether';
if (!ethjsUnit.unitMap[unit]) {
throw new Error('This unit "'+ unit +'" doesn\'t exist, please use the one of the following units' + JSON.stringify(ethjsUnit.unitMap, null, 2));
}
return unit;
};
/**
* Takes a number of wei and converts it to any other ether unit.
*
* Possible units are:
* SI Short SI Full Effigy Other
* - kwei femtoether babbage
* - mwei picoether lovelace
* - gwei nanoether shannon nano
* - -- microether szabo micro
* - -- milliether finney milli
* - ether -- --
* - kether -- grand
* - mether
* - gether
* - tether
*
* @method fromWei
* @param {Number|String} number can be a number, number string or a HEX of a decimal
* @param {String} unit the unit to convert to, default ether
* @return {String|Object} When given a BN object it returns one as well, otherwise a number
*/
var fromWei = function(number, unit) {
unit = getUnitValue(unit);
return utils.isBN(number) ? ethjsUnit.fromWei(number, unit) : ethjsUnit.fromWei(number, unit).toString(10);
};
/**
* Takes a number of a unit and converts it to wei.
*
* Possible units are:
* SI Short SI Full Effigy Other
* - kwei femtoether babbage
* - mwei picoether lovelace
* - gwei nanoether shannon nano
* - -- microether szabo micro
* - -- microether szabo micro
* - -- milliether finney milli
* - ether -- --
* - kether -- grand
* - mether
* - gether
* - tether
*
* @method toWei
* @param {Number|String|BN} number can be a number, number string or a HEX of a decimal
* @param {String} unit the unit to convert from, default ether
* @return {String|Object} When given a BN object it returns one as well, otherwise a number
*/
var toWei = function(number, unit) {
unit = getUnitValue(unit);
return utils.isBN(number) ? ethjsUnit.toWei(number, unit) : ethjsUnit.toWei(number, unit).toString(10);
};
/**
* Converts to a checksum address
*
* @method toChecksumAddress
* @param {String} address the given HEX address
* @return {String}
*/
var toChecksumAddress = function (address) {
if (typeof address === 'undefined') return '';
Iif(!/^(0x)?[0-9a-f]{40}$/i.test(address))
throw new Error('Given address "'+ address +'" is not a valid Ethereum address.');
address = address.toLowerCase().replace(/^0x/i,'');
var addressHash = utils.sha3(address).replace(/^0x/i,'');
var checksumAddress = '0x';
for (var i = 0; i < address.length; i++ ) {
// If ith character is 9 to f then make it uppercase
if (parseInt(addressHash[i], 16) > 7) {
checksumAddress += address[i].toUpperCase();
} else {
checksumAddress += address[i];
}
}
return checksumAddress;
};
module.exports = {
_fireError: _fireError,
_jsonInterfaceMethodToString: _jsonInterfaceMethodToString,
// extractDisplayName: extractDisplayName,
// extractTypeName: extractTypeName,
randomHex: randomHex,
_: _,
BN: utils.BN,
isBN: utils.isBN,
isBigNumber: utils.isBigNumber,
isHex: utils.isHex,
sha3: utils.sha3,
keccak256: utils.sha3,
soliditySha3: soliditySha3,
isAddress: utils.isAddress,
checkAddressChecksum: utils.checkAddressChecksum,
toChecksumAddress: toChecksumAddress,
toHex: utils.toHex,
toBN: utils.toBN,
bytesToHex: utils.bytesToHex,
hexToBytes: utils.hexToBytes,
hexToNumberString: utils.hexToNumberString,
hexToNumber: utils.hexToNumber,
toDecimal: utils.hexToNumber, // alias
numberToHex: utils.numberToHex,
fromDecimal: utils.numberToHex, // alias
hexToUtf8: utils.hexToUtf8,
hexToString: utils.hexToUtf8,
toUtf8: utils.hexToUtf8,
utf8ToHex: utils.utf8ToHex,
stringToHex: utils.utf8ToHex,
fromUtf8: utils.utf8ToHex,
hexToAscii: hexToAscii,
toAscii: hexToAscii,
asciiToHex: asciiToHex,
fromAscii: asciiToHex,
unitMap: ethjsUnit.unitMap,
toWei: toWei,
fromWei: fromWei,
padLeft: utils.leftPad,
leftPad: utils.leftPad,
padRight: utils.rightPad,
rightPad: utils.rightPad
};
|