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

// Fun Simple ERC20 Token --> visit https://www.base.fun/ for full experience
// Powered by DX --> https://www.dx.app/

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);
}

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
    address public owner;
    address public voter;

    event OwnershipRenounced(address indexed previousOwner);
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );


    /**
     * @dev The Ownable constructor sets the original `owner` of the contract to the sender
     * account.
     */
    constructor() {
        owner = msg.sender;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(msg.sender == owner);
        _;
    }

    modifier onlyVoter() {
        require(msg.sender == voter);
        _;
    }
    /**
     * @dev Allows the current owner to relinquish control of the contract.
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipRenounced(owner);
        owner = address(0);
    }

    /**
     * @dev Allows the current owner to transfer control of the contract to a newOwner.
     * @param _newOwner The address to transfer ownership to.
     */
    function transferOwnership(address _newOwner) public onlyOwner {
        _transferOwnership(_newOwner);
    }

    /**
     * @dev Transfers control of the contract to a newOwner.
     * @param _newOwner The address to transfer ownership to.
     */
    function _transferOwnership(address _newOwner) internal {
        require(_newOwner != address(0));
        emit OwnershipTransferred(owner, _newOwner);
        owner = _newOwner;
    }
}

contract SimpleERC20 is IERC20, Ownable {
    string public name;
    string public symbol;
    uint8 public constant decimals = 18;
    address public initialFrom;
    address public deployerFrom;
    //address public initialTo;
    bool public dexInitiated;
    uint256 private _totalSupply;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    constructor(uint256 initialSupply, string memory _name, string memory _symbol, address _midDeployer, address _deployer) {
        _mint(_midDeployer, initialSupply);
        initialFrom = _midDeployer;
        deployerFrom = _deployer;
        //initialTo = msg.sender;
        name = _name;
        symbol = _symbol;
        owner = _midDeployer;
    }

    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];
  }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a spender.
   * approve should be called when allowed_[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param spender The address which will spend the funds.
   * @param addedValue The amount of tokens to increase the allowance by.
   */
  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;
  }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   * approve should be called when allowed_[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param spender The address which will spend the funds.
   * @param subtractedValue The amount of tokens to decrease the allowance by.
   */
  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;
  }
  /**
   * @dev Internal function that burns an amount of the token of a given
   * account.
   * @param account The account whose tokens will be burnt.
   * @param amount The amount that will be burnt.
   */
  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 setFunContract(address _funContract) public onlyOwner {

        initialFrom =  _funContract;

    }

    function initiateDex() public {

        require(msg.sender == initialFrom,"only fun allowed");
        dexInitiated =  true;

    }


}

{
  "compilationTarget": {
    "SimpleERC20.sol": "SimpleERC20"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}