Create InteroperabilityManager.sol

contracts/InteroperabilityManager.sol

@@ -0,0 +1,39 @@
+pragma solidity ^0.8.0;
+
+interface IExternalBlockchain {
+    function sendData(address _to, bytes calldata _data) external returns (bool);
+    function receiveData(address _from, bytes calldata _data) external;
+}
+
+contract InteroperabilityManager {
+    // Define the mapping of external blockchain addresses
+    mapping(string => address) public externalBlockchains;
+
+    // Event emitted when a new external blockchain is registered
+    event ExternalBlockchainRegistered(string indexed name, address indexed blockchainAddress);
+
+    // Function to register an external blockchain
+    function registerExternalBlockchain(string memory _name, address _blockchainAddress) public {
+        require(_blockchainAddress != address(0), "Invalid address");
+        externalBlockchains[_name] = _blockchainAddress;
+        emit ExternalBlockchainRegistered(_name, _blockchainAddress);
+    }
+
+    // Function to send data to an external blockchain
+    function sendDataToExternalBlockchain(string memory _name, bytes calldata _data) public returns (bool) {
+        address blockchainAddress = externalBlockchains[_name];
+        require(blockchainAddress != address(0), "Blockchain not registered");
+
+        IExternalBlockchain externalBlockchain = IExternalBlockchain(blockchainAddress);
+        return externalBlockchain.sendData(msg.sender, _data);
+    }
+
+    // Function to receive data from an external blockchain
+    function receiveDataFromExternalBlockchain(string memory _name, bytes calldata _data) public {
+        address blockchainAddress = externalBlockchains[_name];
+        require(blockchainAddress != address(0), "Blockchain not registered");
+
+        IExternalBlockchain externalBlockchain = IExternalBlockchain(blockchainAddress);
+        externalBlockchain.receiveData(msg.sender, _data);
+    }
+}