Improve customize gas modal error handling

1 files changed, 39 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..bf096d610
--- /dev/null
+++ b/ui/app/components/send/send-utils.js
@@ -0,0 +1,39 @@
+const { addCurrencies, conversionGreaterThan } = require('../../conversion-util')
+
+function isBalanceSufficient({
+  amount,
+  gasTotal,
+  balance,
+  primaryCurrency,
+  selectedToken,
+  amountConversionRate,
+  conversionRate,
+}) {
+  const totalAmount = addCurrencies(amount, gasTotal, {
+    aBase: 16,
+    bBase: 16,
+    toNumericBase: 'hex',
+  })
+
+  const balanceIsSufficient = conversionGreaterThan(
+    {
+      value: balance,
+      fromNumericBase: 'hex',
+      fromCurrency: primaryCurrency,
+      conversionRate,
+    },
+    {
+      value: totalAmount,
+      fromNumericBase: 'hex',
+      conversionRate: amountConversionRate,
+      fromCurrency: selectedToken || primaryCurrency,
+      conversionRate: amountConversionRate,
+    },
+  )
+
+  return balanceIsSufficient
+}
+
+module.exports = {
+  isBalanceSufficient,
+}
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