diff --git a/contracts/LabHelper.sol b/contracts/LabHelper.sol
new file mode 100644
index 00000000..8617c40f
--- /dev/null
+++ b/contracts/LabHelper.sol
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.24;
+
+contract Main {
+    string public topic;
+
+    constructor(string memory initialTopic) {
+        topic = initialTopic;
+    }
+
+    function setTopic(string calldata nextTopic) external {
+        topic = nextTopic;
+    }
+}
\ No newline at end of file