mod any
game.

contract UnimodeToken is ERC20, ERC20Permit, ERC20Burnable {

  // who deployed and can set the mod engine
  address public immutable publisher;

  // the active contract that calls mint()
  address public modEngine;
  bool    public publisherLocked;

  // minted by the mod engine, never past maxSupply
  function mint(address receiver, uint256 amount) external;

  // publisher sets or replaces the mod engine
  function setModEngine(address next) external;

  // freezes the mod engine forever — irreversible
  function lockPublisher() external;

}

contract ModMiner is EIP712 {

  // oracle-signed sessions of mod activity
  struct Session {
    uint64  sessionId;
    uint64  modsCompleted;
    bytes32 modHash; // hash of raw mod data
  }

  // anyone can relay a batch the oracle signed
  function submitBatch(
    Session[] calldata sessions,
    bytes calldata signature
  ) external;

  // reward = modsCompleted × rewardPerMod(era)
  // halves every halvingInterval sessions
  function rewardPerMod(uint64 sessionId)
    public view returns (uint256);

}