1 files changed, 6 insertions, 0 deletions
diff --git a/ui/app/util.js b/ui/app/util.js
index e4b77e2bc..facaef3ee 100644
--- a/ui/app/util.js
+++ b/ui/app/util.js
@@ -35,6 +35,7 @@ module.exports = {
   normalizeNumberToWei: normalizeNumberToWei,
   valueTable: valueTable,
   bnTable: bnTable,
+  isHex: isHex,
 }
 
 function valuesFor (obj) {
@@ -209,3 +210,8 @@ function readableDate (ms) {
   var time = `${hours}:${minutes.substr(-2)}:${seconds.substr(-2)}`
   return `${dateStr} ${time}`
 }
+
+function isHex (str) {
+  if (str.match(/[g-zG-Z]/) || str.match(/\W/)) return false
+  return true
+}