From 801976fafab6d28395f738ba7971e927a3743e9d Mon Sep 17 00:00:00 2001
From: Diana Carvalho <diana@propellerheads.xyz>
Date: Tue, 25 Feb 2025 09:36:04 +0000
Subject: [PATCH] fix: Restrict receive callers to have code

--- don't change below this line ---
ENG-4260 Took 8 minutes
---
 foundry/src/TychoRouter.sol | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/foundry/src/TychoRouter.sol b/foundry/src/TychoRouter.sol
index e4c5fd5..50f7f1e 100644
--- a/foundry/src/TychoRouter.sol
+++ b/foundry/src/TychoRouter.sol
@@ -432,7 +432,9 @@ contract TychoRouter is AccessControl, Dispatcher, Pausable, ReentrancyGuard {
     /**
      * @dev Allows this contract to receive native token
      */
-    receive() external payable {}
+    receive() external payable {
+        require(msg.sender.code.length != 0);
+    }
 
     /**
      * @dev Called by UniswapV3 pool when swapping on it.