发布时间: 2024-04-20 08:36:00
refer to:
solidity中没有浮点数的概念，也没有除法。
2/3 会被识别成：rational_const, 例如：
Compiler run failed: Error (4486): Type rational_const 312500000000000 / 27 is not implicitly convertible to expected type uint256. Try converting to type ufixed256x64 or use an explicit conversion. --> src/ReducingPayout.sol:20:5: | 20 | uint256 reducedPerSecond = (1e18 / 3600 / 24); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
解决办法：
1. 想办法绕过。 例如，计算1 ether的 0.1%, 那么就是 1e15 wei.
2. 使用math第三方包，例如
openzepplin的SafeMath (低版本) , Math( v5 ) https://docs.openzeppelin.com/contracts/5.x/utilities#math
ABDK math lib: https://github.com/abdk-consulting/abdk-libraries-solidity/tree/master
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