openzeppelin-contracts/contracts/mocks/docs/access-control/AccessControlERC20MintBase.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {AccessControl} from "../../../access/AccessControl.sol";
import {ERC20} from "../../../token/ERC20/ERC20.sol";

contract AccessControlERC20MintBase is ERC20, AccessControl {
    // Create a new role identifier for the minter role
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    error CallerNotMinter(address caller);

    constructor(address minter) ERC20("MyToken", "TKN") {
        // Grant the minter role to a specified account
        _grantRole(MINTER_ROLE, minter);
    }

    function mint(address to, uint256 amount) public {
        // Check that the calling account has the minter role
        if (!hasRole(MINTER_ROLE, msg.sender)) {
            revert CallerNotMinter(msg.sender);
        }
        _mint(to, amount);
    }
}