Canto Identity Subprotocols contest - turvy_fuzz's results

> Use assembly to write storage values

unoptimized function updateOwner(address newOwner) public { owner = newOwner; } } optimized function assemblyUpdateOwner(address newOwner) public { assembly { sstore(owner.slot, newOwner) } }

https://github.com/code-423n4/2023-03-canto-identity/blob/main/canto-namespace-protocol/src/Tray.sol#L107

revenueAddress = _revenueAddress; namespaceNFT = _namespaceNFT;

https://github.com/code-423n4/2023-03-canto-identity/blob/main/canto-namespace-protocol/src/Namespace.sol#L206 https://github.com/code-423n4/2023-03-canto-identity/blob/main/canto-namespace-protocol/src/Namespace.sol#L80

> <x> += <y> costs more gas than <x> = <x> + <y> for state variables

Using the addition operator instead of plus-equals saves 113 gas.

https://github.com/code-423n4/2023-03-canto-identity/blob/main/canto-namespace-protocol/src/Namespace.sol#L150

> Reorder struct

https://github.com/code-423n4/2023-03-canto-identity/blob/main/canto-namespace-protocol/src/Tray.sol#L57

Unoptimized struct TileData { uint8 fontClass; uint16 characterIndex; uint8 characterModifier; }

Optimized struct TileData { uint16 characterIndex; uint8 fontClass; uint8 characterModifier; }

> Use assembly to hash instead of Solidity

contract Contract0 { function solidityHash(uint256 a, uint256 b) public view { //unoptimized keccak256(abi.encodePacked(a, b)); }

contract Contract1 { function assemblyHash(uint256 a, uint256 b) public view { //optimized assembly { mstore(0x00, a) mstore(0x20, b) let hashedVal := keccak256(0x00, 0x40)} }

https://github.com/code-423n4/2023-03-canto-identity/blob/main/canto-namespace-protocol/src/Tray.sol#L162