Gas Optimizations

[code423n4]

[Gas - 01] Use Custom Errors

Instead of using error strings, to reduce deployment and runtime cost, you should use Custom Errors: see https://blog.soliditylang.org/2021/04/21/custom-errors/. This would save both deployment and runtime cost, and increase readability !

Examples:
https://github.com/code-423n4/2022-06-nested/blob/b4a153c943d54755711a2f7b80cbbf3a5bb49d76/contracts/operators/Paraswap/ParaswapOperator.sol#L39
https://github.com/code-423n4/2022-06-nested/blob/b4a153c943d54755711a2f7b80cbbf3a5bb49d76/contracts/operators/ZeroEx/ZeroExOperator.sol#L33
And many others !

[maximebrugel]

[Gas - 01] Use Custom Errors (Duplicated)

#6 (see comment)