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Code

move util functions to util.js

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This commit is contained in:
frankiebee 2017-08-04 13:55:00 -04:00
parent 3dcc199845
commit caee2a9e35
2 changed files with 40 additions and 32 deletions
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39
app/scripts/lib/tx-utils.js
View File

@ -1,7 +1,11 @@
const ethUtil = require('ethereumjs-util') const EthQuery = require('ethjs-query')
const Transaction = require('ethereumjs-tx') const Transaction = require('ethereumjs-tx')
const normalize = require('eth-sig-util').normalize const normalize = require('eth-sig-util').normalize
const BN = ethUtil.BN const {
hexToBn,
BnMultiplyByFraction,
bnToHex,
} = require('./util')
/* /*
tx-utils are utility methods for Transaction manager tx-utils are utility methods for Transaction manager
@ -10,8 +14,8 @@ and used to do things like calculate gas of a tx.
*/ */
module.exports = class txProvideUtils { module.exports = class txProvideUtils {
constructor (ethQuery) { constructor (provider) {
this.query = ethQuery this.query = new EthQuery(provider)
} }
async analyzeGasUsage (txMeta) { async analyzeGasUsage (txMeta) {
@ -91,31 +95,4 @@ module.exports = class txProvideUtils {
throw new Error(`Invalid transaction value of ${txParams.value} not a positive number.`) throw new Error(`Invalid transaction value of ${txParams.value} not a positive number.`)
} }
} }
sufficientBalance (txParams, hexBalance) {
const balance = hexToBn(hexBalance)
const value = hexToBn(txParams.value)
const gasLimit = hexToBn(txParams.gas)
const gasPrice = hexToBn(txParams.gasPrice)
const maxCost = value.add(gasLimit.mul(gasPrice))
return balance.gte(maxCost)
}
}
// util
function bnToHex (inputBn) {
return ethUtil.addHexPrefix(inputBn.toString(16))
}
function hexToBn (inputHex) {
return new BN(ethUtil.stripHexPrefix(inputHex), 16)
}
function BnMultiplyByFraction (targetBN, numerator, denominator) {
const numBN = new BN(numerator)
const denomBN = new BN(denominator)
return targetBN.mul(numBN).div(denomBN)
} }

31
app/scripts/lib/util.js
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@ -1,8 +1,39 @@
const ethUtil = require('ethereumjs-util')
const BN = ethUtil.BN
module.exports = { module.exports = {
getStack, getStack,
sufficientBalance,
hexToBn,
bnToHex,
BnMultiplyByFraction,
} }
function getStack () { function getStack () {
const stack = new Error('Stack trace generator - not an error').stack const stack = new Error('Stack trace generator - not an error').stack
return stack return stack
} }
function sufficientBalance (txParams, hexBalance) {
const balance = hexToBn(hexBalance)
const value = hexToBn(txParams.value)
const gasLimit = hexToBn(txParams.gas)
const gasPrice = hexToBn(txParams.gasPrice)
const maxCost = value.add(gasLimit.mul(gasPrice))
return balance.gte(maxCost)
}
function bnToHex (inputBn) {
return ethUtil.addHexPrefix(inputBn.toString(16))
}
function hexToBn (inputHex) {
return new BN(ethUtil.stripHexPrefix(inputHex), 16)
}
function BnMultiplyByFraction (targetBN, numerator, denominator) {
const numBN = new BN(numerator)
const denomBN = new BN(denominator)
return targetBN.mul(numBN).div(denomBN)
}