// SPDX-License-Identifier: MIT
pragma solidity ^0.8.30;

// Regular ERC20 Token: Launched on QuackPond
// https://quackpond.meme

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 approve(address spender, uint256 amount) external returns (bool);

    function allowance(address owner, address spender)
        external
        returns (uint256);

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    function decimals() external returns (uint8);

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

contract SimpleERC20 is IERC20 {
    string public name;
   string public symbol;
    uint8 public constant decimals = 18;
    uint8 public constant version = 1;

    address public initialFrom;
    address public deployerFrom;
    bool public isInitialized;
    bool public dexInitiated;

    uint256 private _totalSupply;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    function initialize(
        uint256 initialSupply,
        string memory _name,
        string memory _symbol,
        address _midDeployer,
        address _deployer
    ) external {
        require(!isInitialized);
        _mint(_midDeployer, initialSupply);
        initialFrom = _midDeployer;
        deployerFrom = _deployer;
        name = _name;
        symbol = _symbol;
        isInitialized = true;
    }

    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
        returns (bool)
    {
        require(_validateTransfer(msg.sender), "not dex listed");

        _transfer(msg.sender, recipient, amount);
        return true;
    }

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

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        require(_validateTransfer(msg.sender), "not dex listed");
        _transfer(sender, recipient, amount);
        _approve(sender, msg.sender, _allowances[sender][msg.sender] - amount);
        return true;
    }

    function Burn(uint256 amount) public returns (bool) {
        _burn(msg.sender, 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");
        require(amount > 0, "invalid transfer amount");

        _balances[sender] -= amount;
        _balances[recipient] += amount;
        emit Transfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, 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 _validateTransfer(address _from) internal view returns (bool) {
        if (dexInitiated) {
            return true;
        }
        if (_from == initialFrom || _from == deployerFrom) {
            return true;
        }
        return false;
    }

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

    function increaseAllowance(address spender, uint256 addedValue)
        public
        returns (bool)
    {
        require(spender != address(0));

        _allowances[msg.sender][spender] = (_allowances[msg.sender][spender] +
            addedValue);
        emit Approval(msg.sender, spender, _allowances[msg.sender][spender]);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        returns (bool)
    {
        require(spender != address(0));

        _allowances[msg.sender][spender] = (_allowances[msg.sender][spender] -
            subtractedValue);
        emit Approval(msg.sender, spender, _allowances[msg.sender][spender]);
        return true;
    }

    function _burn(address account, uint256 amount) internal {
        require(account != address(0));
        require(amount <= _balances[account]);

        _totalSupply = _totalSupply - amount;
        _balances[account] = _balances[account] - amount;
        emit Transfer(account, address(0), amount);
    }

    function initiateDex() public {
        require(msg.sender == initialFrom, "only fun allowed");
        dexInitiated = true;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "viaIR": true,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

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