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