From ecf044953fb0a211be74bbe6b28fa3b029ebeb2c Mon Sep 17 00:00:00 2001
From: Kirill Fomichev <fanatid@ya.ru>
Date: Thu, 6 Apr 2017 22:29:58 +0300
Subject: [PATCH] Remove ethereumjs-util

---
 index.js     | 6 ++++--
 package.json | 2 +-
 test/keys.js | 3 +--
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/index.js b/index.js
index c728a7f..c138797 100644
--- a/index.js
+++ b/index.js
@@ -13,7 +13,7 @@ var crypto = require("crypto");
 var sjcl = require("sjcl");
 var uuid = require("uuid");
 var validator = require("validator");
-var privateToAddress = require("ethereumjs-util").privateToAddress;
+var secp256k1 = require("secp256k1/elliptic");
 var keccak = require("./lib/keccak");
 var scrypt = require("./lib/scrypt");
 
@@ -152,7 +152,9 @@ module.exports = {
    * @return {string} Hex-encoded Ethereum address.
    */
   privateKeyToAddress: function (privateKey) {
-    return "0x" + privateToAddress(str2buf(privateKey)).toString("hex");
+    privateKey = str2buf(privateKey);
+    var publicKey = secp256k1.publicKeyCreate(privateKey, false).slice(1);
+    return "0x" + keccak(hex2utf16le(publicKey.toString("hex"))).slice(-40);
   },
 
   /**
diff --git a/package.json b/package.json
index 3b75fd8..f842de1 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   },
   "homepage": "https://github.com/ethereumjs/keythereum#readme",
   "dependencies": {
-    "ethereumjs-util": "5.1.1",
+    "secp256k1": "^3.2.5",
     "sjcl": "1.0.6",
     "uuid": "3.0.0",
     "validator": "4.0.2"
diff --git a/test/keys.js b/test/keys.js
index cf4942a..09a26d6 100644
--- a/test/keys.js
+++ b/test/keys.js
@@ -6,7 +6,6 @@ var fs = require("fs");
 var path = require("path");
 var crypto = require("crypto");
 var assert = require("chai").assert;
-var privateToAddress = require("ethereumjs-util").privateToAddress;
 var keythereum = require("../");
 var checkKeyObj = require("./checkKeyObj");
 var DEBUG = false;
@@ -18,7 +17,7 @@ var TIMEOUT = 120000;
 var privateKey = crypto.randomBytes(32);
 
 // create address from private key
-var address = privateToAddress(privateKey).toString("hex");
+var address = keythereum.privateKeyToAddress(privateKey).slice(2);
 
 // suppress logging
 keythereum.constants.quiet = !DEBUG;