Platform: Code4rena
Start Date: 29/04/2022
Pot Size: $22,000 USDC
Total HM: 6
Participants: 40
Period: 3 days
Judge: Justin Goro
Total Solo HM: 2
Id: 114
League: ETH
Rank: 38/40
Findings: 1
Award: $28.35
🌟 Selected for report: 0
🚀 Solo Findings: 0
🌟 Selected for report: IllIllI
Also found by: 0v3rf10w, 0x1f8b, 0x4non, 0xDjango, 0xf15ers, 0xkatana, 242, Dravee, GimelSec, MaratCerby, Tadashi, TrungOre, WatchPug, defsec, fatherOfBlocks, gzeon, hake, horsefacts, joestakey, miguelmtzinf, pauliax, pedroais, peritoflores, rotcivegaf, simon135, slywaters, tabish, throttle, z3s
28.3489 USDC - $28.35
Using > 0 uses slightly more gas than using != 0. Use != 0 when comparing uint variables to zero, which cannot hold values below zero
Locations where this was found include https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L179 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L233
Replace > 0 with != 0 to save gas
Solidity errors introduced in version 0.8.4 can save gas on revert conditions https://blog.soliditylang.org/2021/04/21/custom-errors/ https://twitter.com/PatrickAlphaC/status/1505197417884528640
Require statements are used throughout the contract, including these places https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L168 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L171 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L174 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L177 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L179 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L233 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L276 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L337 https://github.com/pooltogether/aave-v3-yield-source/blob/e63d1b0e396a5bce89f093630c282ca1c6627e44/contracts/AaveV3YieldSource.sol#L349
Replace require blocks with new solidity errors described in https://blog.soliditylang.org/2021/04/21/custom-errors/
#0 - PierrickGT
2022-05-03T22:46:45Z
[G-01] Use != 0 instead of > 0
Duplicate of https://github.com/code-423n4/2022-04-pooltogether-findings/issues/11
[G-02] Use Solidity errors instead of require
Duplicate of https://github.com/code-423n4/2022-04-pooltogether-findings/issues/13