cic-contracts/python/solidity/ExpireTest.sol

48 lines
979 B
Solidity
Raw Normal View History

pragma solidity >=0.6.3;
// Author: Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
// SPDX-License-Identifier: AGPL-3.0-or-later
contract ExpireTest {
uint256 public expires;
bool expired;
event Expired(uint256 _timestamp);
event ExpiryChange(uint256 indexed _oldTimestamp, uint256 _newTimestamp);
constructor(uint256 _timestamp) {
expires = _timestamp;
}
function setExpiry(uint256 _timestamp) public {
require(!expired);
require(_timestamp > expires);
emit ExpiryChange(expires, _timestamp);
expires = _timestamp;
}
function applyExpiry() public returns(uint8) {
if (expired) {
return 1;
}
if (block.timestamp < expires) {
return 0;
}
expired = true;
emit Expired(block.timestamp);
return 1;
}
function supportsInterface(bytes4 _sum) public pure returns (bool) {
if (_sum == 0x01ffc9a7) { // EIP165
return true;
}
if (_sum == 0x841a0e94) { // Expire
return true;
}
return false;
}
}