Unused parameter - Medium Severity

[olahfemi]

Description
The function enforceNotBlacklisted(address _addr) an internal function takes in an address but used msg.sender and did not implement the parameter that was used, this could lead to the owner passing in a blacklisted address to the function mint_pre_certificate_token(address _to) and still successfully mint to a blacklisted address.

Context
LibDiamond.sol SLOC 232

Recommendation
The function should be readjusted to to make use of the address that was passed in the parameter as a check against blacklisted address.