Change function visibility from public to external

[code423n4]

Handle

Jujic

Vulnerability details

Impact

Various functions across contracts are never called from within contracts but yet declared public. Their visibility can be made external to save gas.

As described in https://mudit.blog/solidity-gas-optimization-tips/: “For all the public functions, the input parameters are copied to memory automatically, and it costs gas. If your function is only called externally, then you should explicitly mark it as external. External function’s parameters are not copied into memory but are read from calldata directly. This small optimization in your solidity code can save you a lot of gas when the function input parameters are huge.”

Proof of Concept

https://github.com/code-423n4/2021-12-amun/blob/98f6e2ff91f5fcebc0489f5871183566feaec307/contracts/basket/contracts/facets/Call/CallFacet.sol#L75

https://github.com/code-423n4/2021-12-amun/blob/98f6e2ff91f5fcebc0489f5871183566feaec307/contracts/basket/contracts/facets/Call/CallFacet.sol#L87

Tools Used

Remix

Recommended Mitigation Steps

Change function visibility from public to external