add subscriptions test

integration/obscurogateway/events_contract.sol

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: MIT
+// Specify the Solidity version
+pragma solidity ^0.8.0;
+
+contract SimpleMessageContract {
+
+    // State variable to store the message
+    string public message;
+    string public message2;
+
+    // Event declaration
+    event MessageUpdatedWithAddress(string newMessage, address indexed sender);
+    event Message2Updated(string newMessage);
+
+    // Constructor to initialize the message
+    constructor() {
+        message = "foo";
+        message2 = "foo";
+    }
+
+    // Function to set a new message
+    function setMessage(string memory newMessage) public {
+        message = newMessage;
+        emit MessageUpdatedWithAddress(newMessage, msg.sender);  // Emit the event (only sender can see it)
+    }
+
+    function setMessage2(string memory newMessage) public {
+        message2 = newMessage;
+        emit Message2Updated(newMessage);  // Emit the event (everyone can see it)
+    }
+}