Merge pull request #1 from MetaMask/master

Merge from the source

1 files changed, 68 insertions, 0 deletions

diff --git a/ui/app/components/send/send-utils.js b/ui/app/components/send/send-utils.js
new file mode 100644
index 000000000..d8211930d
--- /dev/null
+++ b/ui/app/components/send/send-utils.js
@@ -0,0 +1,68 @@
+const {
+  addCurrencies,
+  conversionUtil,
+  conversionGTE,
+} = require('../../conversion-util')
+const {
+  calcTokenAmount,
+} = require('../../token-util')
+
+function isBalanceSufficient ({
+  amount = '0x0',
+  gasTotal = '0x0',
+  balance,
+  primaryCurrency,
+  amountConversionRate,
+  conversionRate,
+}) {
+  const totalAmount = addCurrencies(amount, gasTotal, {
+    aBase: 16,
+    bBase: 16,
+    toNumericBase: 'hex',
+  })
+
+  const balanceIsSufficient = conversionGTE(
+    {
+      value: balance,
+      fromNumericBase: 'hex',
+      fromCurrency: primaryCurrency,
+      conversionRate,
+    },
+    {
+      value: totalAmount,
+      fromNumericBase: 'hex',
+      conversionRate: amountConversionRate,
+      fromCurrency: primaryCurrency,
+    },
+  )
+
+  return balanceIsSufficient
+}
+
+function isTokenBalanceSufficient ({
+  amount = '0x0',
+  tokenBalance,
+  decimals,
+}) {
+  const amountInDec = conversionUtil(amount, {
+    fromNumericBase: 'hex',
+  })
+
+  const tokenBalanceIsSufficient = conversionGTE(
+    {
+      value: tokenBalance,
+      fromNumericBase: 'dec',
+    },
+    {
+      value: calcTokenAmount(amountInDec, decimals),
+      fromNumericBase: 'dec',
+    },
+  )
+
+  return tokenBalanceIsSufficient
+}
+
+module.exports = {
+  isBalanceSufficient,
+  isTokenBalanceSufficient,
+}