From deffb4d00b7853f4af4b9ee7f79a883d4fa87542 Mon Sep 17 00:00:00 2001
From: Denis Fadeev <denis@fadeev.org>
Date: Tue, 12 Nov 2024 17:35:58 +0300
Subject: [PATCH] returns bytes 4

---
 examples/call/contracts/Connected.sol  | 3 ++-
 examples/nft/contracts/Connected.sol   | 3 ++-
 examples/token/contracts/Connected.sol | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/examples/call/contracts/Connected.sol b/examples/call/contracts/Connected.sol
index 329a0352..d7b174dc 100644
--- a/examples/call/contracts/Connected.sol
+++ b/examples/call/contracts/Connected.sol
@@ -76,8 +76,9 @@ contract Connected {
     function onCall(
         MessageContext calldata context,
         bytes calldata message
-    ) external payable onlyGateway {
+    ) external payable onlyGateway returns (bytes4) {
         emit HelloEvent("Hello on EVM from onCall()", "hey");
+        return "";
     }
 
     function onRevert(
diff --git a/examples/nft/contracts/Connected.sol b/examples/nft/contracts/Connected.sol
index 9cee3f5a..b756a745 100644
--- a/examples/nft/contracts/Connected.sol
+++ b/examples/nft/contracts/Connected.sol
@@ -91,7 +91,7 @@ contract Connected is
     function onCall(
         MessageContext calldata context,
         bytes calldata message
-    ) external payable onlyGateway {
+    ) external payable onlyGateway returns (bytes4) {
         if (context.sender != counterparty) revert Unauthorized();
 
         (address receiver, uint256 tokenId, string memory uri) = abi.decode(
@@ -102,6 +102,7 @@ contract Connected is
         _safeMint(receiver, tokenId);
         _setTokenURI(tokenId, uri);
         emit TokenTransferReceived(receiver, tokenId, uri);
+        return "";
     }
 
     function onRevert(RevertContext calldata context) external onlyGateway {
diff --git a/examples/token/contracts/Connected.sol b/examples/token/contracts/Connected.sol
index 12095acf..9f066163 100644
--- a/examples/token/contracts/Connected.sol
+++ b/examples/token/contracts/Connected.sol
@@ -70,7 +70,7 @@ contract Connected is ERC20, Ownable2Step, Events {
     function onCall(
         MessageContext calldata context,
         bytes calldata message
-    ) external payable onlyGateway {
+    ) external payable onlyGateway returns (bytes4) {
         if (context.sender != counterparty) revert Unauthorized();
         (address receiver, uint256 amount) = abi.decode(
             message,
@@ -78,6 +78,7 @@ contract Connected is ERC20, Ownable2Step, Events {
         );
         _mint(receiver, amount);
         emit TokenTransferReceived(receiver, amount);
+        return "";
     }
 
     function onRevert(RevertContext calldata context) external onlyGateway {}