From de11ded5df238ff7fdb2fc506238239d39e2174f Mon Sep 17 00:00:00 2001
From: Alex Beregszaszi <alex@rtfs.hu>
Date: Tue, 8 Mar 2016 19:47:55 +0000
Subject: [PATCH] Introduce '.getChecksumAddressString()'

---
 index.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/index.js b/index.js
index bdb209a..f189768 100644
--- a/index.js
+++ b/index.js
@@ -41,6 +41,22 @@ Wallet.prototype.getAddressString = function () {
   return '0x' + this.getAddress().toString('hex')
 }
 
+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
+}
+
 // https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition
 Wallet.prototype.toV3 = function (password, opts) {
   opts = opts || {}