Correct rendering of conversions when conversion rate is a token. (#2498)

3 files changed, 52 insertions, 20 deletions

diff --git a/ui/app/components/token-cell.js b/ui/app/components/token-cell.js
index 6bb42204e..f55e23f9e 100644
--- a/ui/app/components/token-cell.js
+++ b/ui/app/components/token-cell.js
@@ -6,7 +6,7 @@ const Identicon = require('./identicon')
 const prefixForNetwork = require('../../lib/etherscan-prefix-for-network')
 const selectors = require('../selectors')
 const actions = require('../actions')
-const { conversionUtil } = require('../conversion-util')
+const { conversionUtil, multiplyCurrencies } = require('../conversion-util')
 
 const TokenMenuDropdown = require('./dropdowns/token-menu-dropdown.js')
 
@@ -17,7 +17,7 @@ function mapStateToProps (state) {
     selectedTokenAddress: state.metamask.selectedTokenAddress,
     userAddress: selectors.getSelectedAddress(state),
     tokenExchangeRates: state.metamask.tokenExchangeRates,
-    ethToUSDRate: state.metamask.conversionRate,
+    conversionRate: state.metamask.conversionRate,
     sidebarOpen: state.appState.sidebarOpen,
   }
 }
@@ -61,7 +61,7 @@ TokenCell.prototype.render = function () {
     setSelectedToken,
     selectedTokenAddress,
     tokenExchangeRates,
-    ethToUSDRate,
+    conversionRate,
     hideSidebar,
     sidebarOpen,
     currentCurrency,
@@ -70,22 +70,26 @@ TokenCell.prototype.render = function () {
   
   const pair = `${symbol.toLowerCase()}_eth`;
 
-  let currentTokenToEthRate;
+  let currentTokenToFiatRate;
   let currentTokenInFiat;
-  let formattedUSD = ''
+  let formattedFiat = ''
 
   if (tokenExchangeRates[pair]) {
-    currentTokenToEthRate = tokenExchangeRates[pair].rate;
+    currentTokenToFiatRate = multiplyCurrencies(
+      tokenExchangeRates[pair].rate,
+      conversionRate
+    )
     currentTokenInFiat = conversionUtil(string, {
       fromNumericBase: 'dec',
       fromCurrency: symbol,
-      toCurrency: 'USD',
+      toCurrency: currentCurrency.toUpperCase(),
       numberOfDecimals: 2,
-      conversionRate: currentTokenToEthRate,
-      ethToUSDRate,
+      conversionRate: currentTokenToFiatRate,
     })
-    formattedUSD = `${currentTokenInFiat} ${currentCurrency.toUpperCase()}`;
+    formattedFiat = `${currentTokenInFiat} ${currentCurrency.toUpperCase()}`;
   }
+
+  const showFiat = Boolean(currentTokenInFiat) && currentCurrency.toUpperCase() !== symbol
  
   return (
     h('div.token-list-item', {
@@ -108,9 +112,9 @@ TokenCell.prototype.render = function () {
       h('h.token-list-item__balance-wrapper', null, [
         h('h3.token-list-item__token-balance', `${string || 0} ${symbol}`),
 
-        h('div.token-list-item__fiat-amount', {
+        showFiat && h('div.token-list-item__fiat-amount', {
           style: {},
-        }, formattedUSD),
+        }, formattedFiat),
       ]),
 
       h('i.fa.fa-ellipsis-h.fa-lg.token-list-item__ellipsis.cursor-pointer', {
diff --git a/ui/app/components/tx-list-item.js b/ui/app/components/tx-list-item.js
index 3bb9a2eda..84026700b 100644
--- a/ui/app/components/tx-list-item.js
+++ b/ui/app/components/tx-list-item.js
@@ -9,7 +9,7 @@ abiDecoder.addABI(abi)
 const prefixForNetwork = require('../../lib/etherscan-prefix-for-network')
 const Identicon = require('./identicon')
 
-const { conversionUtil } = require('../conversion-util')
+const { conversionUtil, multiplyCurrencies } = require('../conversion-util')
 
 const { getCurrentCurrency } = require('../selectors')
 
@@ -19,6 +19,7 @@ function mapStateToProps (state) {
   return {
     tokens: state.metamask.tokens,
     currentCurrency: getCurrentCurrency(state),
+    tokenExchangeRates: state.metamask.tokenExchangeRates,
   }
 }
 
@@ -88,6 +89,9 @@ TxListItem.prototype.getSendTokenTotal = function () {
   const {
     txParams = {},
     tokens,
+    conversionRate,
+    tokenExchangeRates,
+    currentCurrency,
   } = this.props
 
   const toAddress = txParams.to
@@ -95,12 +99,35 @@ TxListItem.prototype.getSendTokenTotal = function () {
   const { params = [] } = decodedData || {}
   const { value } = params[1] || {}
   const { decimals, symbol } = tokens.filter(({ address }) => address === toAddress)[0] || {}
-
   const multiplier = Math.pow(10, Number(decimals || 0))
   const total = Number(value / multiplier)
 
+  const pair = symbol && `${symbol.toLowerCase()}_eth`;
+  
+  let tokenToFiatRate
+  let totalInFiat
+
+  if (tokenExchangeRates[pair]) {
+    tokenToFiatRate = multiplyCurrencies(
+      tokenExchangeRates[pair].rate,
+      conversionRate
+    )
+
+    totalInFiat = conversionUtil(total, {
+      fromNumericBase: 'dec',
+      toNumericBase: 'dec',
+      fromCurrency: symbol,
+      toCurrency: currentCurrency,
+      numberOfDecimals: 2,
+      conversionRate: tokenToFiatRate,
+    })
+  }
+
+  const showFiat = Boolean(totalInFiat) && currentCurrency.toUpperCase() !== symbol
+
   return {
     total: `${total} ${symbol}`,
+    fiatTotal: showFiat && `${totalInFiat} ${currentCurrency.toUpperCase()}`,
   }
 }
 
@@ -182,7 +209,7 @@ TxListItem.prototype.render = function () {
             }),
           }, total),
 
-          h('span.tx-list-fiat-value', fiatTotal),
+          fiatTotal && h('span.tx-list-fiat-value', fiatTotal),
 
         ]),
       ]),
diff --git a/ui/app/conversion-util.js b/ui/app/conversion-util.js
index 39215cf1b..cb715460f 100644
--- a/ui/app/conversion-util.js
+++ b/ui/app/conversion-util.js
@@ -13,7 +13,6 @@
 * @param {string} [options.fromDenomination = 'WEI'] The denomination of the passed value
 * @param {number} [options.numberOfDecimals] The desired number of in the result
 * @param {number} [options.conversionRate] The rate to use to make the fromCurrency -> toCurrency conversion
-* @param {number} [options.ethToUSDRate] If present, a second conversion - at ethToUSDRate - happens after conversionRate is applied.
 * @returns {(number | string | BN)}
 *
 * The utility passes value along with the options as a single object to the `converter` function.
@@ -38,6 +37,7 @@ const BIG_NUMBER_GWEI_MULTIPLIER = new BigNumber('1000000000')
 const convert = R.invoker(1, 'times')
 const round = R.invoker(2, 'round')(R.__, BigNumber.ROUND_DOWN)
 const invertConversionRate = conversionRate => () => new BigNumber(1.0).div(conversionRate)
+const decToBigNumberViaString = n => R.pipe(String, toBigNumber['dec'])
 
 // Setter Maps
 const toBigNumber = {
@@ -95,12 +95,12 @@ const whenPropApplySetterMap = (prop, setterMap) => whenPredSetWithPropAndSetter
 
 // Conversion utility function
 const converter = R.pipe(
+  whenPredSetCRWithPropAndSetter(R.prop('conversionRate'), 'conversionRate', decToBigNumberViaString),
   whenPredSetCRWithPropAndSetter(R.prop('invertConversionRate'), 'conversionRate', invertConversionRate),
   whenPropApplySetterMap('fromNumericBase', toBigNumber),
   whenPropApplySetterMap('fromDenomination', toNormalizedDenomination),
   whenPredSetWithPropAndSetter(fromAndToCurrencyPropsNotEqual, 'conversionRate', convert),
   whenPropApplySetterMap('toDenomination', toSpecifiedDenomination),
-  whenPredSetWithPropAndSetter(R.prop('ethToUSDRate'), 'ethToUSDRate', convert),
   whenPredSetWithPropAndSetter(R.prop('numberOfDecimals'), 'numberOfDecimals', round),
   whenPropApplySetterMap('toNumericBase', baseChange),
   R.view(R.lensProp('value'))
@@ -115,7 +115,6 @@ const conversionUtil = (value, {
   toDenomination,
   numberOfDecimals,
   conversionRate,
-  ethToUSDRate,
   invertConversionRate,
 }) => converter({
   fromCurrency,
@@ -126,7 +125,6 @@ const conversionUtil = (value, {
   toDenomination,
   numberOfDecimals,
   conversionRate,
-  ethToUSDRate,
   invertConversionRate,
   value: value || '0',
 });
@@ -152,7 +150,10 @@ const multiplyCurrencies = (a, b, options = {}) => {
     ...conversionOptions,
   } = options
 
-  const value = (new BigNumber(a, multiplicandBase)).times(b, multiplierBase);
+  const bigNumberA = new BigNumber(String(a), multiplicandBase)
+  const bigNumberB = new BigNumber(String(b), multiplierBase)
+
+  const value = bigNumberA.times(bigNumberB);
 
   return converter({
     value,