// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

abstract contract ValhallaBlackList {
    mapping(address => bool) public blacklistedAddressMap;

    modifier notInBlacklist() {
        require(
            blacklistedAddressMap[msg.sender] != true,
            "Address blacklisted"
        );
        _;
    }

    function addToBlacklistMap(address addr) internal {
        blacklistedAddressMap[addr] = true;
    }
}