Merge pull request #557 from MetaMask/balance-fix

Fix rounding issues.

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Current Master
 
 - Added feature to reflect current conversion rates of current vault balance.
+- Modify balance display logic.
 
 ## 2.8.0 2016-08-15
 

ui/app/components/account-eth-balance.js

@@ -46,16 +46,17 @@ EthBalanceComponent.prototype.render = function () {
 EthBalanceComponent.prototype.renderBalance = function (value, state) {
   if (value === 'None') return value
   var balanceObj = generateBalanceObject(value, state.shorten ? 1 : 3)
-  var balance, fiatNumber
+  var balance, fiatDisplayNumber, fiatTooltipNumber
   var splitBalance = value.split(' ')
   var ethNumber = splitBalance[0]
   var ethSuffix = splitBalance[1]
 
 
   if (state.conversionRate !== 0) {
-    fiatNumber = (Number(splitBalance[0]) * state.conversionRate).toFixed(2)
+    fiatTooltipNumber = Number(splitBalance[0]) * state.conversionRate
+    fiatDisplayNumber = fiatTooltipNumber.toFixed(2)
   } else {
-    fiatNumber = 'N/A'
+    fiatDisplayNumber = 'N/A'
   }
 
   var fiatSuffix = state.currentFiat
@@ -99,16 +100,16 @@ EthBalanceComponent.prototype.renderBalance = function (value, state) {
       ]),
       h(Tooltip, {
         position: 'bottom',
-        title: `${fiatNumber} ${fiatSuffix}`,
+        title: `${fiatTooltipNumber} ${fiatSuffix}`,
       }, [
-        fiatDisplay(fiatNumber, fiatSuffix),
+        fiatDisplay(fiatDisplayNumber, fiatSuffix),
       ]),
     ])
   )
 }
 
-function fiatDisplay (fiatNumber, fiatSuffix) {
+function fiatDisplay (fiatDisplayNumber, fiatSuffix) {
-  if (fiatNumber !== 'N/A') {
+  if (fiatDisplayNumber !== 'N/A') {
     return h('.flex-row', {
       style: {
         alignItems: 'flex-end',
@@ -124,7 +125,7 @@ function fiatDisplay (fiatNumber, fiatSuffix) {
           fontSize: '12px',
           color: '#333333',
         },
-      }, fiatNumber),
+      }, fiatDisplayNumber),
       h('div', {
         style: {
           color: '#AEAEAE',

ui/app/util.js

@@ -141,16 +141,21 @@ function shortenBalance (balance, decimalsToKeep = 1) {
   var convertedBalance = parseFloat(balance)
   if (convertedBalance > 1000000) {
     truncatedValue = (balance / 1000000).toFixed(decimalsToKeep)
-    return `>${truncatedValue}m`
+    return `${truncatedValue}m`
   } else if (convertedBalance > 1000) {
     truncatedValue = (balance / 1000).toFixed(decimalsToKeep)
-    return `>${truncatedValue}k`
+    return `${truncatedValue}k`
   } else if (convertedBalance === 0) {
     return '0'
+  } else if (convertedBalance < 0.001) {
+    return '<0.001'
   } else if (convertedBalance < 1) {
-    var exponent = balance.match(/\.0*/)[0].length
+    var stringBalance = convertedBalance.toString()
-    truncatedValue = (convertedBalance * Math.pow(10, exponent)).toFixed(decimalsToKeep)
+    if (stringBalance.split('.')[1].length > 3) {
-    return `<${truncatedValue}e-${exponent}`
+      return convertedBalance.toFixed(3)
+    } else {
+      return stringBalance
+    }
   } else {
     return convertedBalance.toFixed(decimalsToKeep)
   }