24 lines
804 B
Solidity
24 lines
804 B
Solidity
// Brought from https://github.com/aragon/aragonOS/blob/v4.3.0/contracts/common/Uint256Helpers.sol
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// Adapted to use pragma ^0.5.8 and satisfy our linter rules
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pragma solidity ^0.5.8;
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library Uint256Helpers {
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uint256 private constant MAX_UINT8 = uint8(-1);
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uint256 private constant MAX_UINT64 = uint64(-1);
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string private constant ERROR_UINT8_NUMBER_TOO_BIG = "UINT8_NUMBER_TOO_BIG";
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string private constant ERROR_UINT64_NUMBER_TOO_BIG = "UINT64_NUMBER_TOO_BIG";
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function toUint8(uint256 a) internal pure returns (uint8) {
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require(a <= MAX_UINT8, ERROR_UINT8_NUMBER_TOO_BIG);
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return uint8(a);
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}
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function toUint64(uint256 a) internal pure returns (uint64) {
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require(a <= MAX_UINT64, ERROR_UINT64_NUMBER_TOO_BIG);
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return uint64(a);
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}
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}
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