1 files changed, 15 insertions, 1 deletions
diff --git a/ui/app/util.js b/ui/app/util.js
index 0f3f191aa..d8a0313ea 100644
--- a/ui/app/util.js
+++ b/ui/app/util.js
@@ -21,6 +21,8 @@ for (var currency in valueTable) {
 module.exports = {
   valuesFor: valuesFor,
   addressSummary: addressSummary,
+  isAllOneCase: isAllOneCase,
+  isValidAddress: isValidAddress,
   numericBalance: numericBalance,
   parseBalance: parseBalance,
   formatBalance: formatBalance,
@@ -42,7 +44,19 @@ function valuesFor(obj) {
 }
 
 function addressSummary(address) {
-  return address ? address.slice(0,2+8)+'...'+address.slice(-4) : '...'
+  var checked = ethUtil.toChecksumAddress(address)
+  return checked ? checked.slice(0,2+8)+'...'+checked.slice(-4) : '...'
+}
+
+function isValidAddress(address) {
+  var prefixed = ethUtil.addHexPrefix(address)
+  return isAllOneCase(prefixed) && ethUtil.isValidAddress(prefixed) || ethUtil.isValidChecksumAddress(prefixed)
+}
+
+function isAllOneCase(address) {
+  var lower = address.toLowerCase()
+  var upper = address.toUpperCase()
+  return address === lower || address === upper
 }
 
 // Takes wei Hex, returns wei BN, even if input is null