3 files changed, 43 insertions, 2 deletions
diff --git a/ui/app/helpers/confirm-transaction/util.js b/ui/app/helpers/confirm-transaction/util.js
index eb334a4b8..0451824e8 100644
--- a/ui/app/helpers/confirm-transaction/util.js
+++ b/ui/app/helpers/confirm-transaction/util.js
@@ -95,7 +95,7 @@ export function formatCurrency (value, currencyCode) {
   const upperCaseCurrencyCode = currencyCode.toUpperCase()
 
   return currencies.find(currency => currency.code === upperCaseCurrencyCode)
-    ? currencyFormatter.format(Number(value), { code: upperCaseCurrencyCode })
+    ? currencyFormatter.format(Number(value), { code: upperCaseCurrencyCode, style: 'currency' })
     : value
 }
 
diff --git a/ui/app/helpers/conversions.util.js b/ui/app/helpers/conversions.util.js
index cb5e1b90b..065d67e8e 100644
--- a/ui/app/helpers/conversions.util.js
+++ b/ui/app/helpers/conversions.util.js
@@ -1,6 +1,6 @@
 import ethUtil from 'ethereumjs-util'
-import { conversionUtil } from '../conversion-util'
 import { ETH, GWEI, WEI } from '../constants/common'
+import { conversionUtil, addCurrencies } from '../conversion-util'
 
 export function bnToHex (inputBn) {
   return ethUtil.addHexPrefix(inputBn.toString(16))
@@ -82,3 +82,41 @@ export function getWeiHexFromDecimalValue ({
     toDenomination: WEI,
   })
 }
+
+export function addHexWEIsToDec (aHexWEI, bHexWEI) {
+  return addCurrencies(aHexWEI, bHexWEI, {
+    aBase: 16,
+    bBase: 16,
+    fromDenomination: 'WEI',
+    numberOfDecimals: 6,
+  })
+}
+
+export function decEthToConvertedCurrency (ethTotal, convertedCurrency, conversionRate) {
+  return conversionUtil(ethTotal, {
+    fromNumericBase: 'dec',
+    toNumericBase: 'dec',
+    fromCurrency: 'ETH',
+    toCurrency: convertedCurrency,
+    numberOfDecimals: 2,
+    conversionRate,
+  })
+}
+
+export function decGWEIToHexWEI (decGWEI) {
+  return conversionUtil(decGWEI, {
+    fromNumericBase: 'dec',
+    toNumericBase: 'hex',
+    fromDenomination: 'GWEI',
+    toDenomination: 'WEI',
+  })
+}
+
+export function hexWEIToDecGWEI (decGWEI) {
+  return conversionUtil(decGWEI, {
+    fromNumericBase: 'hex',
+    toNumericBase: 'dec',
+    fromDenomination: 'WEI',
+    toDenomination: 'GWEI',
+  })
+}
diff --git a/ui/app/helpers/formatters.js b/ui/app/helpers/formatters.js
new file mode 100644
index 000000000..106a2520d
--- /dev/null
+++ b/ui/app/helpers/formatters.js
@@ -0,0 +1,3 @@
+export function formatETHFee (ethFee) {
+  return ethFee + ' ETH'
+}