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Move getTaxBN and bnMultiplyByFraction to util.js

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This commit is contained in:
Dan 2017-08-28 20:36:10 -02:30
parent dc72c4cc91
commit cd351e8aef
2 changed files with 29 additions and 25 deletions
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30
ui/app/send.js
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@ -10,12 +10,14 @@ const BN = ethUtil.BN
const hexToBn = require('../../app/scripts/lib/hex-to-bn')
const numericBalance = require('./util').numericBalance
const addressSummary = require('./util').addressSummary
const bnMultiplyByFraction = require('./util').bnMultiplyByFraction
const isHex = require('./util').isHex
const EthBalance = require('./components/eth-balance')
const EnsInput = require('./components/ens-input')
const FiatValue = require('./components/fiat-value.js')
const GasTooltip = require('./components/gas-tooltip.js')
const { getSelectedIdentity } = require('./selectors')
const getTxFeeBn = require('./util').getTxFeeBn
const ARAGON = '960b236A07cf122663c4303350609A66A7B288C0'
@ -67,7 +69,6 @@ function SendTransactionScreen () {
this.back = this.back.bind(this)
this.back = this.back.bind(this)
this.closeTooltip = this.closeTooltip.bind(this)
this.getTxFeeBn = this.getTxFeeBn.bind(this)
this.onSubmit = this.onSubmit.bind(this)
this.onSubmit = this.onSubmit.bind(this)
this.recipientDidChange = this.recipientDidChange.bind(this)
@ -76,28 +77,6 @@ function SendTransactionScreen () {
this.toggleTooltip = this.toggleTooltip.bind(this)
}
SendTransactionScreen.prototype.bnMultiplyByFraction = function (targetBN, numerator, denominator) {
const numBN = new BN(numerator)
const denomBN = new BN(denominator)
return targetBN.mul(numBN).div(denomBN)
}
SendTransactionScreen.prototype.getTxFeeBn = function (gas, gasPrice = MIN_GAS_PRICE_BN.toString(16)) {
const { blockGasLimit } = this.props;
const gasBn = hexToBn(gas)
const gasLimit = new BN(parseInt(blockGasLimit))
const safeGasLimit = this.bnMultiplyByFraction(gasLimit, 19, 20).toString(10)
// Gas Price
const gasPriceBn = hexToBn(gasPrice)
const txFeeBn = gasBn.mul(gasPriceBn)
const fiatMultiplier = hexToBn((1000000000).toString(16))
const txFeeAsFiatBn = txFeeBn.mul(fiatMultiplier)
return txFeeAsFiatBn;
}
SendTransactionScreen.prototype.render = function () {
this.persistentFormParentId = 'send-tx-form'
@ -113,6 +92,7 @@ SendTransactionScreen.prototype.render = function () {
conversionRate,
currentCurrency,
} = props
const { blockGasLimit } = this.state
console.log({ selectedIdentity, identities })
console.log("SendTransactionScreen state:", this.state)
@ -265,7 +245,7 @@ SendTransactionScreen.prototype.render = function () {
h('div.large-input.send-screen-gas-input', {}, [
currentCurrency === 'USD'
? h(FiatValue, {
value: this.getTxFeeBn(this.state.newTx.gas.toString(16), this.state.newTx.gasPrice.toString(16)).toString(16),
value: getTxFeeBn(this.state.newTx.gas.toString(16), this.state.newTx.gasPrice.toString(16), blockGasLimit).toString(16),
conversionRate,
currentCurrency,
style: {
@ -276,7 +256,7 @@ SendTransactionScreen.prototype.render = function () {
}
})
: h(EthBalance, {
value: this.getTxFeeBn(this.state.newTx.gas.toString(16), this.state.newTx.gasPrice.toString(16)).toString(16),
value: getTxFeeBn(this.state.newTx.gas.toString(16), this.state.newTx.gasPrice.toString(16), blockGasLimit).toString(16),
currentCurrency,
conversionRate,
showFiat: false,

24
ui/app/util.js
View File

@ -1,4 +1,5 @@
const ethUtil = require('ethereumjs-util')
const hexToBn = require('../../app/scripts/lib/hex-to-bn')
const vreme = new (require('vreme'))()
// formatData :: ( date: <Unix Timestamp> ) -> String
@ -43,6 +44,8 @@ module.exports = {
bnTable: bnTable,
isHex: isHex,
formatDate,
bnMultiplyByFraction,
getTxFeeBn,
}
function valuesFor (obj) {
@ -222,3 +225,24 @@ function readableDate (ms) {
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), blockGasLimit) {
const gasBn = hexToBn(gas)
const gasLimit = new ethUtil.BN(parseInt(blockGasLimit))
const safeGasLimit = bnMultiplyByFraction(gasLimit, 19, 20).toString(10)
// Gas Price
const gasPriceBn = hexToBn(gasPrice)
const txFeeBn = gasBn.mul(gasPriceBn)
const fiatMultiplier = hexToBn((1000000000).toString(16))
const txFeeAsFiatBn = txFeeBn.mul(fiatMultiplier)
return txFeeAsFiatBn;
}