added: example contract file

GreeterNotifier.sol

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.28;
+
+contract GreeterNotifier {
+    string greeting;
+
+    event ReactiveNotification(
+        address indexed from,
+        address indexed to,
+        string title,
+        string description,
+        uint256 chainId,
+        string cta,
+        bytes data
+    );
+
+    constructor() {
+        greeting = "Hello, World!";
+    }
+
+    function getGreeting() public view returns (string memory) {
+        return greeting;
+    }
+
+    function setGreeting(string memory _greeting) public {
+        greeting = _greeting;
+        emit ReactiveNotification(
+            address(this),
+            msg.sender,
+            "Greeting Updated",
+            _greeting,
+            block.chainid,
+            "https://example-cta.com",
+            "0x"
+        );
+    }
+}

README.md

@@ -68,6 +68,8 @@ emit ReactiveNotification(
 }
 ```
 
+You can find the complete example of the smart contract [here](GreeterNotifier.sol).
+
 ### 2. Event Subscription:
 
 Users subscribe to the `ReactiveNotification` event on their preferred chain and smartcontract they are interested in.
@@ -159,4 +161,4 @@ This is a proof of concept and is not ready for production use. It is not audite
 
 ## License
 
-This project is licensed under the MIT License.
+This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for details.