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code-423n4 / 2022-01-insure-findings

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Gas Optimization: Use unchecked for safe math #317

Open code423n4 opened 2 years ago

code423n4 commented 2 years ago

Handle

gzeon

Vulnerability details

Impact

Use unchecked for safe math to save gas, for example: https://github.com/code-423n4/2022-01-insure/blob/19d1a7819fe7ce795e6d4814e7ddf8b8e1323df3/contracts/PremiumModels/BondingPremium.sol#L176

        premiumRate = premiumRate / T_1 / (u1 - u2) / BASE;

Since we have 1) T_1 != 0 (L229) 2) (u1 - u2) != 0 (L126-132) 3) BASE != 0 (L28) we can safely wrap this line in an unchecked block