diff --git a/blockchain_integration/pi_network/pi-network-layer2-scaling/contracts/rollups/RollupValidator.sol b/blockchain_integration/pi_network/pi-network-layer2-scaling/contracts/rollups/RollupValidator.sol
new file mode 100644
index 000000000..42ea79195
--- /dev/null
+++ b/blockchain_integration/pi_network/pi-network-layer2-scaling/contracts/rollups/RollupValidator.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "./Rollup.sol";
+
+contract RollupValidator {
+    Rollup public rollup;
+
+    event TransactionValidated(bytes32 indexed stateRoot, address indexed sender);
+
+    constructor(address _rollup) {
+        rollup = Rollup(_rollup);
+    }
+
+    function validateTransaction(bytes32 _stateRoot, address _sender) external {
+        require(rollup.getCurrentStateRoot() == _stateRoot, "Invalid state root");
+        emit TransactionValidated(_stateRoot, _sender);
+    }
+}