/**
 *Submitted for verification at basescan.org on 2024-07-13
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract PENPEN {
uint8 public constant decimals = 18;
    address public owner;
    string public constant name = "PENPEN The Penguin";
    string public constant symbol = "PENPEN";
    uint256 public constant totalSupply = 10000000000 * 10**18; // 

    mapping(address => uint256) balances;
    mapping(address => mapping(address => uint256)) allowed;

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

    constructor() {
        owner = msg.sender;
        balances[msg.sender] = totalSupply;
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "Only the contract owner can call this function");
        _;
    }

    function transferOwnership(address newOwner) external onlyOwner {
        require(newOwner != address(0), "Invalid new owner address");
        owner = newOwner;
    }

    function renounceOwnership() external onlyOwner {
        owner = address(0);
    }

    function balanceOf(address _owner) external view returns (uint256 balance) {
        return balances[_owner];
    }

    function transfer(address _to, uint256 _value) external returns (bool success) {
        require(_to != address(0), "Invalid recipient address");
        require(balances[msg.sender] >= _value, "Insufficient balance");
        
        balances[msg.sender] -= _value;
        balances[_to] += _value;
        
        emit Transfer(msg.sender, _to, _value);
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) external returns (bool success) {
        require(_to != address(0), "Invalid recipient address");
        require(balances[_from] >= _value, "Insufficient balance");
        require(allowed[_from][msg.sender] >= _value, "Not enough allowance");
        
        balances[_from] -= _value;
        balances[_to] += _value;
        allowed[_from][msg.sender] -= _value;
        
        emit Transfer(_from, _to, _value);
        return true;
    }

    function approve_to(address _spender, uint256 _value) external returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function approve_sender(address _spender, uint256 _value) external returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function approve(address _spender, uint256 _value) external returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        
        emit Approval(msg.sender, _spender, _value);
        return true;
    }


    function allowance(address _owner, address _spender) external view returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }
}

{
  "compilationTarget": {
    "src/LP.sol": "PENPEN"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [
    ":@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    ":ds-test/=lib/openzeppelin-contracts/lib/forge-std/lib/ds-test/src/",
    ":erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    ":forge-std/=lib/forge-std/src/",
    ":openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ]
}