1 files changed, 122 insertions, 0 deletions
diff --git a/ui/app/helpers/utils/conversions.util.js b/ui/app/helpers/utils/conversions.util.js
new file mode 100644
index 000000000..b4ec50626
--- /dev/null
+++ b/ui/app/helpers/utils/conversions.util.js
@@ -0,0 +1,122 @@
+import ethUtil from 'ethereumjs-util'
+import { ETH, GWEI, WEI } from '../constants/common'
+import { conversionUtil, addCurrencies } from './conversion-util'
+
+export function bnToHex (inputBn) {
+  return ethUtil.addHexPrefix(inputBn.toString(16))
+}
+
+export function hexToDecimal (hexValue) {
+  return conversionUtil(hexValue, {
+    fromNumericBase: 'hex',
+    toNumericBase: 'dec',
+  })
+}
+
+export function decimalToHex (decimal) {
+  return conversionUtil(decimal, {
+    fromNumericBase: 'dec',
+    toNumericBase: 'hex',
+  })
+}
+
+export function getEthConversionFromWeiHex ({ value, fromCurrency = ETH, conversionRate, numberOfDecimals = 6 }) {
+  const denominations = [fromCurrency, GWEI, WEI]
+
+  let nonZeroDenomination
+
+  for (let i = 0; i < denominations.length; i++) {
+    const convertedValue = getValueFromWeiHex({
+      value,
+      conversionRate,
+      fromCurrency,
+      toCurrency: fromCurrency,
+      numberOfDecimals,
+      toDenomination: denominations[i],
+    })
+
+    if (convertedValue !== '0' || i === denominations.length - 1) {
+      nonZeroDenomination = `${convertedValue} ${denominations[i]}`
+      break
+    }
+  }
+
+  return nonZeroDenomination
+}
+
+export function getValueFromWeiHex ({
+  value,
+  fromCurrency = ETH,
+  toCurrency,
+  conversionRate,
+  numberOfDecimals,
+  toDenomination,
+}) {
+  return conversionUtil(value, {
+    fromNumericBase: 'hex',
+    toNumericBase: 'dec',
+    fromCurrency,
+    toCurrency,
+    numberOfDecimals,
+    fromDenomination: WEI,
+    toDenomination,
+    conversionRate,
+  })
+}
+
+export function getWeiHexFromDecimalValue ({
+  value,
+  fromCurrency,
+  conversionRate,
+  fromDenomination,
+  invertConversionRate,
+}) {
+  return conversionUtil(value, {
+    fromNumericBase: 'dec',
+    toNumericBase: 'hex',
+    toCurrency: ETH,
+    fromCurrency,
+    conversionRate,
+    invertConversionRate,
+    fromDenomination,
+    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',
+  })
+}