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
|
const ethUtil = require('ethereumjs-util')
var valueTable = {
wei: '1000000000000000000',
kwei: '1000000000000000',
mwei: '1000000000000',
gwei: '1000000000',
szabo: '1000000',
finney: '1000',
ether: '1',
kether: '0.001',
mether: '0.000001',
gether: '0.000000001',
tether: '0.000000000001',
}
var bnTable = {}
for (var currency in valueTable) {
bnTable[currency] = new ethUtil.BN(valueTable[currency], 10)
}
module.exports = {
valuesFor: valuesFor,
addressSummary: addressSummary,
isAllOneCase: isAllOneCase,
isValidAddress: isValidAddress,
numericBalance: numericBalance,
parseBalance: parseBalance,
formatBalance: formatBalance,
dataSize: dataSize,
readableDate: readableDate,
ethToWei: ethToWei,
weiToEth: weiToEth,
normalizeToWei: normalizeToWei,
normalizeEthStringToWei: normalizeEthStringToWei,
normalizeNumberToWei: normalizeNumberToWei,
valueTable: valueTable,
bnTable: bnTable,
}
function valuesFor (obj) {
if (!obj) return []
return Object.keys(obj)
.map(function (key) { return obj[key] })
}
function addressSummary (address) {
if (!address) return ''
var checked = ethUtil.toChecksumAddress(address)
return checked ? checked.slice(0, 2 + 8) + '...' + checked.slice(-4) : '...'
}
function isValidAddress (address) {
var prefixed = ethUtil.addHexPrefix(address)
return (isAllOneCase(prefixed) && ethUtil.isValidAddress(prefixed)) || ethUtil.isValidChecksumAddress(prefixed)
}
function isAllOneCase (address) {
if (!address) return true
var lower = address.toLowerCase()
var upper = address.toUpperCase()
return address === lower || address === upper
}
// Takes wei Hex, returns wei BN, even if input is null
function numericBalance (balance) {
if (!balance) return new ethUtil.BN(0, 16)
var stripped = ethUtil.stripHexPrefix(balance)
return new ethUtil.BN(stripped, 16)
}
// Takes eth BN, returns BN wei
function ethToWei (bn) {
var eth = new ethUtil.BN('1000000000000000000')
var wei = bn.mul(eth)
return wei
}
// Takes BN in Wei, returns BN in eth
function weiToEth (bn) {
var diff = new ethUtil.BN('1000000000000000000')
var eth = bn.div(diff)
return eth
}
// Takes hex, returns [beforeDecimal, afterDecimal]
function parseBalance (balance) {
var beforeDecimal, afterDecimal
const wei = numericBalance(balance).toString()
const trailingZeros = /0+$/
beforeDecimal = wei.length > 18 ? wei.slice(0, wei.length - 18) : '0'
afterDecimal = ('000000000000000000' + wei).slice(-18).replace(trailingZeros, '')
if (afterDecimal === '') { afterDecimal = '0' }
return [beforeDecimal, afterDecimal]
}
// Takes wei hex, returns "None" or "${formattedAmount} ETH"
function formatBalance (balance, decimalsToKeep) {
var parsed = parseBalance(balance)
var beforeDecimal = parsed[0]
var afterDecimal = parsed[1]
var formatted = 'None'
if (decimalsToKeep === undefined) {
if (beforeDecimal === '0') {
if (afterDecimal !== '0') {
var sigFigs = afterDecimal.match(/^0*(.{2})/) // default: grabs 2 most significant digits
if (sigFigs) { afterDecimal = sigFigs[0] }
formatted = ['0.' + afterDecimal, ' ETH']
}
} else {
formatted = [beforeDecimal + '.' + afterDecimal.slice(0, 3), ' ETH']
}
} else {
afterDecimal += Array(decimalsToKeep).join('0')
formatted = [beforeDecimal + '.' + afterDecimal.slice(0, decimalsToKeep), ' ETH']
}
return formatted
}
function dataSize (data) {
var size = data ? ethUtil.stripHexPrefix(data).length : 0
return size + ' bytes'
}
// Takes a BN and an ethereum currency name,
// returns a BN in wei
function normalizeToWei (amount, currency) {
try {
return amount.mul(bnTable.wei).div(bnTable[currency])
} catch (e) {}
return amount
}
function normalizeEthStringToWei (str) {
const parts = str.split('.')
let eth = new ethUtil.BN(parts[0], 10).mul(bnTable.wei)
if (parts[1]) {
var decimal = parts[1]
while (decimal.length < 18) {
decimal += '0'
}
const decimalBN = new ethUtil.BN(decimal, 10)
eth = eth.add(decimalBN)
}
return eth
}
var multiple = new ethUtil.BN('10000', 10)
function normalizeNumberToWei (n, currency) {
var enlarged = n * 10000
var amount = new ethUtil.BN(String(enlarged), 10)
return normalizeToWei(amount, currency).div(multiple)
}
function readableDate (ms) {
var date = new Date(ms)
var month = date.getMonth()
var day = date.getDate()
var year = date.getFullYear()
var hours = date.getHours()
var minutes = '0' + date.getMinutes()
var seconds = '0' + date.getSeconds()
var dateStr = `${month}/${day}/${year}`
var time = `${hours}:${minutes.substr(-2)}:${seconds.substr(-2)}`
return `${dateStr} ${time}`
}
|
