From fed8116eb64224bc7b140c6f60da9ea7bcb9bb21 Mon Sep 17 00:00:00 2001
From: Cehhiro <hiro@cehh.io>
Date: Tue, 15 Jan 2019 15:00:20 -0600
Subject: [PATCH] make the tx immutable

---
 packages/web3-eth-accounts/src/index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/web3-eth-accounts/src/index.js b/packages/web3-eth-accounts/src/index.js
index f3da6f30f34..6f0cc8da553 100644
--- a/packages/web3-eth-accounts/src/index.js
+++ b/packages/web3-eth-accounts/src/index.js
@@ -129,9 +129,10 @@ Accounts.prototype.privateKeyToAccount = function privateKeyToAccount(privateKey
     return this._addAccountFunctions(Account.fromPrivate(privateKey));
 };
 
-Accounts.prototype.signTransaction = function signTransaction(tx, privateKey, callback) {
+Accounts.prototype.signTransaction = function signTransaction(inputTx, privateKey, callback) {
     var _this = this,
         error = false,
+        tx = JSON.parse(JSON.stringify(inputTx)),
         result;
 
     callback = callback || function () {};