feat: Add BytecodeExporter to TestUtils

Add example usage for BalancerV2

Took 2 hours 27 minutes


Took 10 seconds

foundry/test/TestUtils.sol

@@ -26,4 +26,26 @@ contract TestUtils is Test {
 
         revert("Test calldata not found");
     }
+
+    /// @notice Export the runtime bytecode of a deployed contract to a JSON file.
+    /// @dev
+    /// This function captures the runtime bytecode (including immutables) of the deployed
+    /// contract at `contractAddr` and writes it to a JSON file under `test/<name>.runtime.json`.
+    /// The resulting file is intended to be used for SDK testing in another repository and
+    /// should be copied there. It **should not** be committed in this repository.
+    /// @param contractAddr The address of the deployed contract to extract runtime bytecode from.
+    /// @param contractName The base filename for the exported JSON file.
+    function exportRuntimeBytecode(
+        address contractAddr,
+        string memory contractName
+    ) internal {
+        bytes memory runtime = contractAddr.code;
+        string memory hexCode = vm.toString(runtime);
+        string memory json =
+            string.concat('{"runtimeBytecode":"', hexCode, '"}');
+
+        string memory path =
+            string.concat("test/", contractName, ".runtime.json");
+        vm.writeFile(path, json);
+    }
 }