```\nmodifier onlyLatestRocketNetworkContract() {\n    // The owner and other contracts are only allowed to set the storage upon deployment to register the initial contracts/settings, afterwards their direct access is disabled\n    if (boolStorage[keccak256(abi.encodePacked("contract.storage.initialised"))] == true) {\n        // Make sure the access is permitted to only contracts in our Dapp\n        require(boolStorage[keccak256(abi.encodePacked("contract.exists", msg.sender))], "Invalid or outdated network contract");\n    }\n    \_;\n}\n```\n