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Exercice 2: Access control

exercises/exercise2/coin.sol possess an access control with the onlyOwner modifier. A frequent mistake is to forget to add the modifier to a critical function. We are going to see how to implement a conservative access control approach with Slither.

The goal is to create a script that will ensure that all the public and external function calls onlyOwner, except for the functions whitelisted.

Proposed algorithm

Create a whitelist of signatures
Explore all the functions
    If the function is in the whitelist of signatures:
        Skip
    If the function is public or external:
        If onlyOwner is not in the modifiers:
            A bug is found

Solution

See exercises/exercise2/solution.py.