namespace TRC20TokenManager.Contracts
{
    public static class TimedTRC20Contract
    {
        public const string Bytecode = @"
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);
}

contract TimedTRC20 is IERC20 {
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    uint8 private _decimals;
    uint256 public immutable expiryTimestamp;
    address private _owner;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    constructor(
        string memory name_,
        string memory symbol_,
        uint8 decimals_,
        uint256 totalSupply_,
        uint256 expiryDays
    ) {
        _name = name_;
        _symbol = symbol_;
        _decimals = decimals_;
        _totalSupply = totalSupply_ * 10**decimals_;
        _owner = msg.sender;
        _balances[msg.sender] = _totalSupply;
        expiryTimestamp = block.timestamp + (expiryDays * 1 days);
    }

    modifier notExpired() {
        require(block.timestamp < expiryTimestamp, ""Token has expired"");
        _;
    }

    function name() public view returns (string memory) { return _name; }
    function symbol() public view returns (string memory) { return _symbol; }
    function decimals() public view returns (uint8) { return _decimals; }
    function totalSupply() public view override returns (uint256) { return _totalSupply; }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public override notExpired returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override notExpired returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override notExpired returns (bool) {
        uint256 currentAllowance = _allowances[sender][msg.sender];
        require(currentAllowance >= amount, ""ERC20: transfer amount exceeds allowance"");
        
        _transfer(sender, recipient, amount);
        _approve(sender, msg.sender, currentAllowance - amount);
        
        return true;
    }

    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), ""ERC20: transfer from the zero address"");
        require(recipient != address(0), ""ERC20: transfer to the zero address"");

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, ""ERC20: transfer amount exceeds balance"");
        
        _balances[sender] = senderBalance - amount;
        _balances[recipient] += amount;
        
        emit Transfer(sender, recipient, amount);
    }

    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), ""ERC20: approve from the zero address"");
        require(spender != address(0), ""ERC20: approve to the zero address"");
        
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function isExpired() public view returns (bool) {
        return block.timestamp >= expiryTimestamp;
    }

    function timeRemaining() public view returns (uint256) {
        if (block.timestamp >= expiryTimestamp) return 0;
        return expiryTimestamp - block.timestamp;
    }
}";
    }
}