From bc239bad706acf5c6fa18e8ff2fece58755a9e93 Mon Sep 17 00:00:00 2001
From: Ricardo Guilherme Schmidt <3esmit@gmail.com>
Date: Sun, 30 Sep 2018 00:44:23 -0300
Subject: [PATCH] prevent reentracy from registerUser to slashUsername

---
 contracts/registry/UsernameRegistrar.sol | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/contracts/registry/UsernameRegistrar.sol b/contracts/registry/UsernameRegistrar.sol
index 77c814b..6fd448f 100644
--- a/contracts/registry/UsernameRegistrar.sol
+++ b/contracts/registry/UsernameRegistrar.sol
@@ -605,7 +605,7 @@ contract UsernameRegistrar is Controlled, ApproveAndCallFallBack {
         emit UsernameOwner(namehash, _owner);
     }
     
-        /**
+    /**
      * @dev Removes account hash of `_username` and send account.balance to msg.sender.
      * @param _username Username being slashed.
      */
@@ -620,6 +620,7 @@ contract UsernameRegistrar is Controlled, ApproveAndCallFallBack {
                 "Nothing to slash."
             );
         } else {
+            assert(accounts[label].creationTime != block.timestamp);
             amountToTransfer = accounts[label].balance;
             delete accounts[label];
         }