Use toChecksumAddress from ethereumjs-util 4.1.0

index.js

@@ -42,19 +42,7 @@ Wallet.prototype.getAddressString = function () {
 }
 
 Wallet.prototype.getChecksumAddressString = function () {
-  var address = this.getAddress().toString('hex')
-  var hash = ethUtil.sha3(address).toString('hex')
-  var ret = '0x'
-
-  for (var i = 0; i < address.length; i++) {
-    if (parseInt(hash[i], 16) >= 8) {
-      ret += address[i].toUpperCase()
-    } else {
-      ret += address[i]
-    }
-  }
-
-  return ret
+  return ethUtil.toChecksumAddress(this.getAddressString())
 }
 
 // https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition

package.json

@@ -24,7 +24,7 @@
   },
   "homepage": "https://github.com/axic/ethereumjs-wallet",
   "dependencies": {
-    "ethereumjs-util": "^4.0.0",
+    "ethereumjs-util": "^4.1.0",
     "scrypt.js": "^0.1.0",
     "uuid": "^2.0.1"
   },