From ea9d51e427b8e607e612a01629bebf153e516ad9 Mon Sep 17 00:00:00 2001
From: Alexander Tseung <alextsg@gmail.com>
Date: Fri, 22 Jun 2018 23:52:45 -0700
Subject: Refactor and redesign confirm transaction views

---
 ui/app/helpers/confirm-transaction/util.js | 101 +++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 ui/app/helpers/confirm-transaction/util.js

(limited to 'ui/app/helpers')

diff --git a/ui/app/helpers/confirm-transaction/util.js b/ui/app/helpers/confirm-transaction/util.js
new file mode 100644
index 000000000..fa748ca46
--- /dev/null
+++ b/ui/app/helpers/confirm-transaction/util.js
@@ -0,0 +1,101 @@
+import currencyFormatter from 'currency-formatter'
+import currencies from 'currency-formatter/currencies'
+import abi from 'human-standard-token-abi'
+import abiDecoder from 'abi-decoder'
+import ethUtil from 'ethereumjs-util'
+
+abiDecoder.addABI(abi)
+
+import {
+  conversionUtil,
+  addCurrencies,
+  multiplyCurrencies,
+  conversionGreaterThan,
+} from '../../conversion-util'
+
+export function getTokenData (data = {}) {
+  return abiDecoder.decodeMethod(data)
+}
+
+export function increaseLastGasPrice (lastGasPrice) {
+  return ethUtil.addHexPrefix(multiplyCurrencies(lastGasPrice, 1.1, {
+    multiplicandBase: 16,
+    multiplierBase: 10,
+    toNumericBase: 'hex',
+  }))
+}
+
+export function hexGreaterThan (a, b) {
+  return conversionGreaterThan(
+    { value: a, fromNumericBase: 'hex' },
+    { value: b, fromNumericBase: 'hex' },
+  )
+}
+
+export function getHexGasTotal ({ gasLimit, gasPrice }) {
+  return ethUtil.addHexPrefix(multiplyCurrencies(gasLimit, gasPrice, {
+    toNumericBase: 'hex',
+    multiplicandBase: 16,
+    multiplierBase: 16,
+  }))
+}
+
+export function addEth (...args) {
+  return args.reduce((acc, base) => {
+    return addCurrencies(acc, base, {
+      toNumericBase: 'dec',
+      numberOfDecimals: 6,
+    })
+  })
+}
+
+export function addFiat (...args) {
+  return args.reduce((acc, base) => {
+    return addCurrencies(acc, base, {
+      toNumericBase: 'dec',
+      numberOfDecimals: 2,
+    })
+  })
+}
+
+export function getTransactionAmount ({
+  value,
+  toCurrency,
+  conversionRate,
+  numberOfDecimals,
+}) {
+  return conversionUtil(value, {
+    fromNumericBase: 'hex',
+    toNumericBase: 'dec',
+    fromCurrency: 'ETH',
+    toCurrency,
+    numberOfDecimals,
+    fromDenomination: 'WEI',
+    conversionRate,
+  })
+}
+
+export function getTransactionFee ({
+  value,
+  toCurrency,
+  conversionRate,
+  numberOfDecimals,
+}) {
+  return conversionUtil(value, {
+    fromNumericBase: 'BN',
+    toNumericBase: 'dec',
+    fromDenomination: 'WEI',
+    fromCurrency: 'ETH',
+    toCurrency,
+    numberOfDecimals,
+    conversionRate,
+  })
+}
+
+export function formatCurrency (value, currencyCode) {
+  const upperCaseCurrencyCode = currencyCode.toUpperCase()
+
+  return currencies.find(currency => currency.code === upperCaseCurrencyCode)
+    ? currencyFormatter.format(Number(value), { code: upperCaseCurrencyCode })
+    : value
+}
-- 
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