ENS

gistfile1.txt

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.22;

import "forge-std/console.sol";
import "forge-std/Test.sol";

contract XTest is DSTest {

    uint256 expires = 1000;
    uint256 constant GRACE_PERIOD = 90 days;

    function renew(uint256 duration) public returns (uint256){
        unchecked{
            require(expires + GRACE_PERIOD >= block.timestamp, "Multichain: expired");
            require(expires + duration + GRACE_PERIOD > duration + GRACE_PERIOD, "Multichain: invalid duration");

            expires += duration;
        }

        return expires;
    }
    function test1() public {
        uint256 newExpires = renew(type(uint256).max - 999);
        assertGt(newExpires, expires);
    }
}