Platform: Code4rena
Start Date: 12/07/2022
Pot Size: $35,000 USDC
Total HM: 13
Participants: 78
Period: 3 days
Judge: 0xean
Total Solo HM: 6
Id: 135
League: ETH
Rank: 71/78
Findings: 1
Award: $25.90
🌟 Selected for report: 0
🚀 Solo Findings: 0
🌟 Selected for report: joestakey
Also found by: 0x040, 0x1f8b, 0xDjango, 0xNazgul, 0xsam, Avci, Aymen0909, Bnke0x0, CRYP70, ElKu, Fitraldys, Funen, JC, Kaiziron, MadWookie, Meera, ReyAdmirado, Sm4rty, Soosh, TomJ, Waze, _Adam, __141345__, ajtra, benbaessler, c3phas, csanuragjain, durianSausage, exd0tpy, fatherOfBlocks, hake, ignacio, karanctf, kyteg, m_Rassska, oyc_109, rbserver, robee, rokinot, samruna, sashik_eth, simon135, slywaters
25.8969 USDC - $25.90
Post-increment / post-decrement cost more gas than pre-increment/pre-decrement. Modify the following statements https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L100 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L269 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L418 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L511 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L564
Greater or equal/lower or equal cost more gas than greater/lower. Swich operators <= / >= for < / > and change to increment / decrement the variable in consecuence. https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L749 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/ZcToken.sol#L112 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L757 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/ZcToken.sol#L133 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L712 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L727 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L745
Greater than 0 cost more than !=0. Change the following statements: https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/VaultTracker/VaultTracker.sol#L54 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/VaultTracker/VaultTracker.sol#L59 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/VaultTracker/VaultTracker.sol#L93 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/VaultTracker/VaultTracker.sol#L123 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/VaultTracker/VaultTracker.sol#L165 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/VaultTracker/VaultTracker.sol#L181 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/VaultTracker/VaultTracker.sol#L184 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/VaultTracker.sol#L54 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/VaultTracker.sol#L59 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/VaultTracker/VaultTracker.sol#L222 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/VaultTracker.sol#L93 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/VaultTracker.sol#L123 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/VaultTracker.sol#L165 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/VaultTracker.sol#L181 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/VaultTracker.sol#L184 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Creator/VaultTracker.sol#L222
String is like a dynamic array so cost less gas if use bytes32 when the text has enough size. https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L25 https://github.com/code-423n4/2022-07-swivel/blob/daf72892d8a8d6eaa43b9e7d1924ccb0e612ee3c/Swivel/Swivel.sol#L26