QUESO Audit

General Observations

The contract imports ERC20, Ownable, and AccessControl from OpenZeppelin, which are well-regarded, secure, and widely-used implementations of these standards. This is a good practice as it reduces the risk of bugs in these foundational components.

Specific Observations

Role Management

The use of AccessControl for role management is a good practice. It allows for fine-grained permissions. However, it's crucial to ensure that roles are managed securely throughout the lifecycle of the contract, especially when roles are granted or revoked. Mismanagement can lead to unauthorized access and potential abuse.

Minting and Burning

The mint and burn functions are restricted to addresses with specific roles, which is good for controlling the supply of tokens. However, ensure that the mechanisms to grant and revoke these roles are secure and well-governed.

Consider implementing rate limiting or caps for minting to prevent abuse by authorized addresses.

Burritos.Cash Response: Decided against this as this would prevent the Queso Fountain from working as intended. Users should be able to control how much they QUESO they move through the GateKeeper and this would limit that, resulting in a poor user experience.

Transfer of Ownership

The transferOwnership function properly requires that the new owner address is not the zero address. This is a critical check to avoid losing control of the contract.

The function also correctly reassigns roles associated with ownership, which is a good security practice to prevent the previous owner from retaining undue control.

The use of super.transferOwnership(newOwner) after updating roles ensures that the ownership transfer adheres to the intended inheritance and overrides.

Burritos.Cash Response: This only exists in case it's ever needing to be transferred for security reasons. When contract is renounced this will be irrelevant.

Renounce Ownership

The renounceOwnership function includes an important safeguard by revoking roles before renouncing ownership. This prevents residual control from lingering after ownership has been renounced. However, renouncing ownership to the zero address (address(0)) completely removes the ability to manage the contract in the future. This action should only be taken if you are certain no future administrative intervention will be required.

getCurrentSupply

This function is a simple and safe way to expose the total supply of tokens. It does not pose a direct security risk.

Security Considerations

Centralization of Power: The initial setup grants the deployer (msg.sender) all roles, centralizing control. Ensure that the distribution of roles to multiple entities is considered to mitigate the risk of a single point of failure or abuse.

Burritos.Cash Response: This is essential in order to launch the project to be what it is intended to be.

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