1 files changed, 16 insertions, 3 deletions
diff --git a/ui/app/util.js b/ui/app/util.js
index 31757e7c3..e27956a45 100644
--- a/ui/app/util.js
+++ b/ui/app/util.js
@@ -60,6 +60,15 @@ module.exports = {
   getTokenAddressFromTokenObject,
   checksumAddress,
   addressSlicer,
+  isEthNetwork,
+}
+
+function isEthNetwork (netId) {
+  if (!netId || netId === '1' || netId === '3' || netId === '4' || netId === '42' || netId === '5777') {
+    return true
+  }
+
+  return false
 }
 
 function valuesFor (obj) {
@@ -83,9 +92,10 @@ function miniAddressSummary (address) {
   return checked ? checked.slice(0, 4) + '...' + checked.slice(-4) : '...'
 }
 
-function isValidAddress (address) {
+function isValidAddress (address, network) {
   var prefixed = ethUtil.addHexPrefix(address)
   if (address === '0x0000000000000000000000000000000000000000') return false
+  if (!isEthNetwork(network)) return (ethUtil.isValidAddress(prefixed) && address === address.toLowerCase())
   return (isAllOneCase(prefixed) && ethUtil.isValidAddress(prefixed)) || ethUtil.isValidChecksumAddress(prefixed)
 }
 
@@ -299,10 +309,13 @@ function getTokenAddressFromTokenObject (token) {
  * Safely checksumms a potentially-null address
  *
  * @param {String} [address] - address to checksum
+ * @param {String} [network] - network id
  * @returns {String} - checksummed address
+ *
  */
-function checksumAddress (address) {
-  return address ? ethUtil.toChecksumAddress(address) : ''
+function checksumAddress (address, network) {
+  const checksummed = address ? ethUtil.toChecksumAddress(address) : ''
+  return checksummed && network && !isEthNetwork(network) ? checksummed.toLowerCase() : checksummed
 }
 
 function addressSlicer (address = '') {