Merge pull request #3 from abstraction-hq/2-implement-fallback-and-re…

…ceiver

chore: Add fallback and receive functions to DefaultCallbackHandler

src/libraries/DefaultCallbackHandler.sol

@@ -41,4 +41,7 @@ contract DefaultCallbackHandler is IERC721Receiver, IERC1155Receiver, IERC777Rec
         return interfaceId == type(IERC1155Receiver).interfaceId || interfaceId == type(IERC721Receiver).interfaceId
             || interfaceId == type(IERC165).interfaceId || super.supportsInterface(interfaceId);
     }
+
+    fallback() external payable {}
+    receive() external payable {}
 }