contract a{address immutable o;string public d;constructor(address m){o = m;}function s(string calldata n)external{assert(o==msg.sender);d = n;}}

{
  "compilationTarget": {
    "a.sol": "a"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}