laconicd/tests-solidity/suites/initializable-buidler/contracts/Uint256Helpers.sol
Brett Sun c9639c3860
tests: add solidity test suites (#487)
* tests: add solidity test suite

* tests: remove require strings

* Update tests-solidity/init-test-node.sh

* Update tests-solidity/init-test-node.sh

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
2020-09-01 17:16:28 -04:00

14 lines
340 B
Solidity

pragma solidity ^0.4.24;
library Uint256Helpers {
uint256 private constant MAX_UINT64 = uint64(-1);
string private constant ERROR_NUMBER_TOO_BIG = "UINT64_NUMBER_TOO_BIG";
function toUint64(uint256 a) internal pure returns (uint64) {
require(a <= MAX_UINT64, ERROR_NUMBER_TOO_BIG);
return uint64(a);
}
}