in this contract // SPDX-License-Identifier: SYMM-Core-Business-Source-License-1.1
// This contract is licensed under the SYMM Core Business Source License 1.1
// Copyright (c) 2023 Symmetry Labs AG
// For more information, see https://docs.symm.io/legal-disclaimer/license
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";
import "@openzeppelin/contracts/access/extensions/AccessControlEnumerable.sol";

contract SolverVaultToken is ERC20, ERC20Burnable, AccessControlEnumerable {
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    constructor() ERC20("SolverVaultToken", "SVT") {
        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _grantRole(MINTER_ROLE, msg.sender);
    }

    function mint(address to, uint256 amount) public onlyRole(MINTER_ROLE) {
        _mint(to, amount);
    }
}  review and prove with evidence if this are invalid or valid issues     Use a multisig wallet for role management
    high severity, medium likelihood

    To enhance the security of role management, particularly for granting and revoking the MINTER_ROLE, it is recommended to use a multisig wallet. This requires multiple signatures from trusted parties to execute sensitive functions, reducing the risk of unauthorized access or single points of failure.

    Example:
        Deploy a multisig wallet contract that requires, for example, 3 out of 5 signatures to execute transactions.
        Transfer the DEFAULT_ADMIN_ROLE from the deployer's address to the multisig wallet address.
        Use the multisig wallet to call grantRole and revokeRole functions.

    // After deploying multisig wallet and transferring DEFAULT_ADMIN_ROLE

    function grantMinterRole(address _solverVaultAddress) public onlyRole(DEFAULT_ADMIN_ROLE) {
        grantRole(MINTER_ROLE, _solverVaultAddress);
    }

    function revokeMinterRole(address _addressToRevoke) public onlyRole(DEFAULT_ADMIN_ROLE) {
        revokeRole(MINTER_ROLE, _addressToRevoke);
    }

    By using a multisig wallet, you ensure that critical decisions, such as role assignments, are made collectively by multiple stakeholders, which is a best practice for decentralized governance and enhances the security of the contract.
    Implement reentrancy guard for the mint function
    high severity, medium likelihood

    To prevent reentrancy attacks on the mint function, which can be a vulnerability when interacting with other contracts, implement a reentrancy guard. This can be done by using OpenZeppelin's ReentrancyGuard contract and adding the nonReentrant modifier to the mint function.

    Example:

    import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

    contract SolverVaultToken is ERC20, ERC20Burnable, AccessControlEnumerable, ReentrancyGuard {
        // ... existing code ...

        function mint(address to, uint256 amount) public onlyRole(MINTER_ROLE) nonReentrant {
            _mint(to, amount);
        }
    }

    By adding the nonReentrant modifier, you ensure that the mint function cannot be re-entered while it is still executing, which is a common vector for reentrancy attacks. This is necessary because the mint function interacts with external addresses and could potentially be exploited if reentrancy is not mitigated.
    Add input validation and access control checks
    medium severity, medium likelihood

    To ensure the integrity of the contract's functions, input validation and access control checks should be implemented. This includes verifying that the address to which tokens are being minted is not the zero address, and that the amount being minted is greater than zero. Additionally, ensure that the mint function can only be called by addresses with the MINTER_ROLE.

    Example:

    function mint(address to, uint256 amount) public onlyRole(MINTER_ROLE) {
        require(to != address(0), "SolverVaultToken: mint to the zero address");
        require(amount > 0, "SolverVaultToken: mint amount not greater than 0");
        _mint(to, amount);
    }

    By adding these checks, you prevent common mistakes and malicious attempts to disrupt the contract's normal operation. The require statements ensure that the function will revert if the conditions are not met, protecting the contract from invalid inputs and unauthorized access.