drawManager = params.drawManager;
if (drawManager != address(0)) { //@audit-issue - can be front run by a malicious user
  revert DrawManagerAlreadySet();
}
    drawManager = params.drawManager;
    if (params.drawManager != address(0)) {
      emit DrawManagerSet(params.drawManager);
    }
  function setDrawManager(address _drawManager) external {
    if (drawManager != address(0)) {
      revert DrawManagerAlreadySet();
    }
    drawManager = _drawManager;

    emit DrawManagerSet(_drawManager);
  }
  function closeDraw(uint256 winningRandomNumber_) external onlyDrawManager returns (uint16) {
  function withdrawReserve(address _to, uint104 _amount) external onlyDrawManager {
    if (_amount > _reserve) {
      revert InsufficientReserve(_amount, _reserve);
    }
    _reserve -= _amount;
    _transfer(_to, _amount);
    emit WithdrawReserve(_to, _amount);
  }
