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add info on safemath

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steinkirch.eth, phd 2023-06-19 09:19:01 -07:00 • committed by GitHub
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advanced_expert/vulnerabilities/arithmetic_errors/README.md
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<br>
* defaults:
* solidity < 0.8: integers in overflow / underflow without any errors.
* solidity >= 0.8: default behaviour of for overflow / underflow is to throw an error.
* use **[SafeMath](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/SafeMath.sol)** to prevent arithmetic overflow and underflow.