const abi = require('human-standard-token-abi')
const ethUtil = require('ethereumjs-util')
const hexToBn = require('../../../../app/scripts/lib/hex-to-bn')
import { DateTime } from 'luxon'
const MIN_GAS_PRICE_GWEI_BN = new ethUtil.BN(1)
const GWEI_FACTOR = new ethUtil.BN(1e9)
const MIN_GAS_PRICE_BN = MIN_GAS_PRICE_GWEI_BN.mul(GWEI_FACTOR)
// formatData :: ( date: <Unix Timestamp> ) -> String
function formatDate (date, format = 'M/d/y \'at\' T') {
return DateTime.fromMillis(date).toFormat(format)
}
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,
miniAddressSummary: miniAddressSummary,
isAllOneCase: isAllOneCase,
isValidAddress: isValidAddress,
isValidENSAddress,
numericBalance: numericBalance,
parseBalance: parseBalance,
formatBalance: formatBalance,
generateBalanceObject: generateBalanceObject,
dataSize: dataSize,
readableDate: readableDate,
normalizeToWei: normalizeToWei,
normalizeEthStringToWei: normalizeEthStringToWei,
normalizeNumberToWei: normalizeNumberToWei,
valueTable: valueTable,
bnTable: bnTable,
isHex: isHex,
formatDate,
bnMultiplyByFraction,
getTxFeeBn,
shortenBalance,
getContractAtAddress,
exportAsFile: exportAsFile,
isInvalidChecksumAddress,
allNull,
getTokenAddressFromTokenObject,
checksumAddress,
addressSlicer,
isEthNetwork,
}
function isEthNetwork (netId) {
if (!netId || netId === '1' || netId === '3' || netId === '4' || netId === '42' || netId === '5777') {
return true
}
return false
}
function valuesFor (obj) {
if (!obj) return []
return Object.keys(obj)
.map(function (key) { return obj[key] })
}
function addressSummary (address, firstSegLength = 10, lastSegLength = 4, includeHex = true) {
if (!address) return ''
let checked = checksumAddress(address)
if (!includeHex) {
checked = ethUtil.stripHexPrefix(checked)
}
return checked ? checked.slice(0, firstSegLength) + '...' + checked.slice(checked.length - lastSegLength) : '...'
}
function miniAddressSummary (address) {
if (!address) return ''
var checked = checksumAddress(address)
return checked ? checked.slice(0, 4) + '...' + checked.slice(-4) : '...'
}
function isValidAddress (address) {
var prefixed = ethUtil.addHexPrefix(address)
if (address === '0x0000000000000000000000000000000000000000') return false
return (isAllOneCase(prefixed) && ethUtil.isValidAddress(prefixed)) || ethUtil.isValidChecksumAddress(prefixed)
}
function isValidENSAddress (address) {
return address.match(/^.{7,}\.(eth|test)$/)
}
function isInvalidChecksumAddress (address) {
var prefixed = ethUtil.addHexPrefix(address)
if (address === '0x0000000000000000000000000000000000000000') return false
return !isAllOneCase(prefixed) && !ethUtil.isValidChecksumAddress(prefixed) && ethUtil.isValidAddress(prefixed)
}
function isAllOneCase (address) {
if (!address) return true
var lower = address.toLowerCase()
var upper = address.toUpperCase()
return address === lower || address === upper
}
// Takes wei Hex, returns wei BN, even if input is null
function numericBalance (balance) {
if (!balance) return new ethUtil.BN(0, 16)
var stripped = ethUtil.stripHexPrefix(balance)
return new ethUtil.BN(stripped, 16)
}
// Takes hex, returns [beforeDecimal, afterDecimal]
function parseBalance (balance) {
var beforeDecimal, afterDecimal
const wei = numericBalance(balance)
var weiString = wei.toString()
const trailingZeros = /0+$/
beforeDecimal = weiString.length > 18 ? weiString.slice(0, weiString.length - 18) : '0'
afterDecimal = ('000000000000000000' + wei).slice(-18).replace(trailingZeros, '')
if (afterDecimal === '') { afterDecimal = '0' }
return [beforeDecimal, afterDecimal]
}
// Takes wei hex, returns an object with three properties.
// Its "formatted" property is what we generally use to render values.
function formatBalance (balance, decimalsToKeep, needsParse = true, ticker = 'TAN') {
var parsed = needsParse ? parseBalance(balance) : balance.split('.')
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 + ` ${ticker}`
}
} else {
formatted = beforeDecimal + '.' + afterDecimal.slice(0, 3) + ` ${ticker}`
}
} else {
afterDecimal += Array(decimalsToKeep).join('0')
formatted = beforeDecimal + '.' + afterDecimal.slice(0, decimalsToKeep) + ` ${ticker}`
}
return formatted
}
function generateBalanceObject (formattedBalance, decimalsToKeep = 1) {
var balance = formattedBalance.split(' ')[0]
var label = formattedBalance.split(' ')[1]
var beforeDecimal = balance.split('.')[0]
var afterDecimal = balance.split('.')[1]
var shortBalance = shortenBalance(balance, decimalsToKeep)
if (beforeDecimal === '0' && afterDecimal.substr(0, 5) === '00000') {
// eslint-disable-next-line eqeqeq
if (afterDecimal == 0) {
balance = '0'
} else {
balance = '<1.0e-5'
}
} else if (beforeDecimal !== '0') {
balance = `${beforeDecimal}.${afterDecimal.slice(0, decimalsToKeep)}`
}
return { balance, label, shortBalance }
}
function shortenBalance (balance, decimalsToKeep = 1) {
var truncatedValue
var convertedBalance = parseFloat(balance)
if (convertedBalance > 1000000) {
truncatedValue = (balance / 1000000).toFixed(decimalsToKeep)
return `${truncatedValue}m`
} else if (convertedBalance > 1000) {
truncatedValue = (balance / 1000).toFixed(decimalsToKeep)
return `${truncatedValue}k`
} else if (convertedBalance === 0) {
return '0'
} else if (convertedBalance < 0.001) {
return '<0.001'
} else if (convertedBalance < 1) {
var stringBalance = convertedBalance.toString()
if (stringBalance.split('.')[1].length > 3) {
return convertedBalance.toFixed(3)
} else {
return stringBalance
}
} else {
return convertedBalance.toFixed(decimalsToKeep)
}
}
function dataSize (data) {
var size = data ? ethUtil.stripHexPrefix(data).length : 0
return size + ' bytes'
}
// Takes a BN and an ethereum currency name,
// returns a BN in wei
function normalizeToWei (amount, currency) {
try {
return amount.mul(bnTable.wei).div(bnTable[currency])
} catch (e) {}
return amount
}
function normalizeEthStringToWei (str) {
const parts = str.split('.')
let eth = new ethUtil.BN(parts[0], 10).mul(bnTable.wei)
if (parts[1]) {
var decimal = parts[1]
while (decimal.length < 18) {
decimal += '0'
}
if (decimal.length > 18) {
decimal = decimal.slice(0, 18)
}
const decimalBN = new ethUtil.BN(decimal, 10)
eth = eth.add(decimalBN)
}
return eth
}
var multiple = new ethUtil.BN('10000', 10)
function normalizeNumberToWei (n, currency) {
var enlarged = n * 10000
var amount = new ethUtil.BN(String(enlarged), 10)
return normalizeToWei(amount, currency).div(multiple)
}
function readableDate (ms) {
var date = new Date(ms)
var month = date.getMonth()
var day = date.getDate()
var year = date.getFullYear()
var hours = date.getHours()
var minutes = '0' + date.getMinutes()
var seconds = '0' + date.getSeconds()
var dateStr = `${month}/${day}/${year}`
var time = `${hours}:${minutes.substr(-2)}:${seconds.substr(-2)}`
return `${dateStr} ${time}`
}
function isHex (str) {
return Boolean(str.match(/^(0x)?[0-9a-fA-F]+$/))
}
function bnMultiplyByFraction (targetBN, numerator, denominator) {
const numBN = new ethUtil.BN(numerator)
const denomBN = new ethUtil.BN(denominator)
return targetBN.mul(numBN).div(denomBN)
}
function getTxFeeBn (gas, gasPrice = MIN_GAS_PRICE_BN.toString(16)) {
const gasBn = hexToBn(gas)
const gasPriceBn = hexToBn(gasPrice)
const txFeeBn = gasBn.mul(gasPriceBn)
return txFeeBn.toString(16)
}
function getContractAtAddress (tokenAddress) {
return global.eth.contract(abi).at(tokenAddress)
}
function exportAsFile (filename, data, type = 'text/csv') {
// source: https://stackoverflow.com/a/33542499 by Ludovic Feltz
const blob = new Blob([data], {type})
if (window.navigator.msSaveOrOpenBlob) {
window.navigator.msSaveBlob(blob, filename)
} else {
const elem = window.document.createElement('a')
elem.target = '_blank'
elem.href = window.URL.createObjectURL(blob)
elem.download = filename
document.body.appendChild(elem)
elem.click()
document.body.removeChild(elem)
}
}
function allNull (obj) {
return Object.entries(obj).every(([_, value]) => value === null)
}
function getTokenAddressFromTokenObject (token) {
return Object.values(token)[0].address.toLowerCase()
}
/**
* Safely checksumms a potentially-null address
*
* @param {String} [address] - address to checksum
* @returns {String} - checksummed address
*
*/
function checksumAddress (address) {
const checksummed = address ? ethUtil.toChecksumAddress(address) : ''
return checksummed
}
function addressSlicer (address = '') {
if (address.length < 11) {
return address
}
return `${address.slice(0, 6)}...${address.slice(-4)}`
}