Platform: Code4rena
Start Date: 14/07/2022
Pot Size: $25,000 USDC
Total HM: 2
Participants: 63
Period: 3 days
Judge: PierrickGT
Total Solo HM: 1
Id: 147
League: ETH
Rank: 62/63
Findings: 1
Award: $16.87
🌟 Selected for report: 0
🚀 Solo Findings: 0
🌟 Selected for report: IllIllI
Also found by: 0x1f8b, 0x29A, 0xKitsune, 0xNazgul, Aymen0909, Chom, Deivitto, ElKu, JC, JohnSmith, Kaiziron, Limbooo, MadWookie, Meera, ReyAdmirado, Rohan16, Sm4rty, SooYa, TomJ, Trumpero, Waze, __141345__, ajtra, ak1, antonttc, bulej93, c3phas, cRat1st0s, csanuragjain, defsec, durianSausage, fatherOfBlocks, gogo, hake, hickuphh3, ignacio, joestakey, karanctf, kyteg, m_Rassska, pashov, rajatbeladiya, rbserver, robee, rokinot, samruna, sashik_eth, simon135, tofunmi
16.8729 USDC - $16.87
!= 0 will do the same as > 0 for unsigned integers, but != 0 costs less gas compared to > 0 for unsigned integers in require statements with the optimizer enabled.
Witch.sol:255: require(auction_.start > 0, "Vault not under auction"); Witch.sol:300: require(auction_.start > 0, "Vault not under auction"); Witch.sol:358: require(auction_.start > 0, "Vault not under auction"); Witch.sol:416: require(auction_.start > 0, "Vault not under auction");
It is recommended to replace > 0 with != 0, as they do the same thing for unsigned integers, and '!= 0' costs less gas compared to > 0 in require statements with the optimizer enabled, also enable the optimizer.
For example :
Witch.sol:255: require(auction_.start != 0, "Vault not under auction");