laconicd-deprecated/tests-solidity/suites/initializable-buidler/contracts/Petrifiable.sol

22 lines
633 B
Solidity
Raw Normal View History

pragma solidity ^0.4.24;
import "./Initializable.sol";
contract Petrifiable is Initializable {
// Use block UINT256_MAX (which should be never) as the initializable date
uint256 internal constant PETRIFIED_BLOCK = uint256(-1);
function isPetrified() public view returns (bool) {
return getInitializationBlock() == PETRIFIED_BLOCK;
}
/**
* @dev Function to be called by top level contract to prevent being initialized.
* Useful for freezing base contracts when they're used behind proxies.
*/
function petrify() internal onlyInit {
initializedAt(PETRIFIED_BLOCK);
}
}