First file adding

src/DappIndexer.sol

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-3.0
+pragma solidity ^0.8.23;
+
+import "@openzeppelin/contracts/access/AccessControl.sol";
+
+contract DappIndexer is AccessControl {
+
+    constructor(){
+        _grantRole(DEFAULT_ADMIN_ROLE, defaultAdmin);
+    }
+
+
+}