// SPDX-License-Identifier: MIT

pragma solidity ^0.8.6;


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);
}

library Address {
   
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }
   
    function toPayable(address account) internal pure returns (address payable) {
        return payable(address(uint160(account)));
    }

    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-call-value
        (bool success, ) = recipient.call{value:amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
}

contract Context {
   
    constructor ()  { }
   

    function _msgSender() internal view returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view returns (bytes memory) {
        this; 
        return msg.data;
    }
}

contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

  
    constructor ()  {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

   
    function owner() external view returns (address) {
        return _owner;
    }

    
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

   
    function isOwner() public view returns (bool) {
        return _msgSender() == _owner;
    }

    function renounceOwnership() external onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

 
    function transferOwnership(address newOwner) external onlyOwner {
        _transferOwnership(newOwner);
    }

   
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

contract ERC20 is Context, IERC20,Ownable {
   

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;
    string private  _name;
    string private _symbol;
    uint8 private _decimals;
    
    constructor(string memory name_, string memory symbol_)  {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }
    
  
    function name() external view returns (string memory) {
        return _name;
    }


    function symbol() external view returns (string memory) {
        return _symbol;
    }
    
    
     function decimals() external view returns (uint8) {
        return _decimals;
    }


  
    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) {
        _transfer(_msgSender(), 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) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

   function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
    
        _approve(sender, _msgSender(), currentAllowance - amount);
 

        return true;
    }

   
   function increaseAllowance(address spender, uint256 addedValue) external virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }
   
   function decreaseAllowance(address spender, uint256 subtractedValue) external virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
      
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
    

        return true;
    }

    
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

  
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }
   
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }
   
   function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        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 _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
    
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

}

contract PLEToken is ERC20{
    
   constructor() ERC20("Plethori","PLE") {
       _mint(msg.sender,100e6 ether);
   }

}