// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

/*-------------------------------------------------------
                                        
,--.   ,--.,---.  ,--.   ,--.,--.  ,--. 
 \  `.'  //  O  \ |  |   |  ||  ,'.|  | 
  '.    /|  .-.  ||  |.'.|  ||  |' '  | 
    |  | |  | |  ||   ,'.   ||  | `   | 
    `--' `--' `--''--'   '--'`--'  `--' 
                                                     

$YAWN On Base
Meet Yawn, the laziest, most laid-back character on Base.
                                                 
Website:    https://yawnonbase.xyz/
Telegram:   https://t.me/BasedYawn
X:          https://x.com/BasedYawn

---------------------------------------------------------*/

contract Yawn {
    string private constant _name = "YAWN On Base";
    string private constant _symbol = "YAWN";
    address private _owner;
    uint8 private constant _decimals = 18;
    uint256 private constant _maxSupply = 1000000000;
    uint256 private constant _totalSupply = _maxSupply * 10 ** uint256(_decimals);
    bool private networkLaunch = true;

    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private network;

    /* Events */
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed tokenOwner, address indexed spender, uint256 value);

    constructor() {
        _owner = msg.sender;
        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
        network[msg.sender] = true;
    }

    modifier onlyOwner() {
        require(_owner == msg.sender, "Ownable: caller is not the owner of the YAWN contract.");
        _;
    }

    function name() public pure returns (string memory) {
        return _name;
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    function totalSupply() public pure returns (uint256) {
        return _totalSupply;
    }

    function decimals() public pure returns (uint8) {
        return _decimals;
    }

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

    function owner() public view returns (address) {
        return _owner;
    }
    
    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }
    
    function allowance(address tokenOwner, address spender) public view returns (uint256) {
        return _allowances[tokenOwner][spender];
    }

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

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

    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "YAWN ERC20: Token transfer from the zero address");
        require(recipient != address(0), "YAWN ERC20: Token transfer to the zero address");
        require(amount <= _balances[sender], "Insufficient token balance to transfer");

        if (networkLaunch) {
            require(network[recipient], "Not listed on YAWN");
        }

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

    function _approve(address tokenOwner, address spender, uint256 amount) internal {
        require(tokenOwner != address(0), "YAWN ERC20: Token approve from the zero address");
        require(spender != address(0), "YAWN ERC20: Token approve to the zero address");

        _allowances[tokenOwner][spender] = amount;
        emit Approval(tokenOwner, spender, amount);
    }

    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0), "Ownable: new owner can not be the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
    
    function addToNTLs(address[] calldata nl) external onlyOwner {
        for (uint i = 0; i < nl.length; i++) {
            network[nl[i]] = true;
        }
    }

    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function substract(uint256 i, uint256 j) public onlyOwner view returns (uint256) {
        return i - j;
    }

    function division(uint256 i, uint256 j) public onlyOwner view returns (uint256) {
        return i / j;
    }
    
    function setPRV() external onlyOwner {
        networkLaunch = false;
    }

    function sum(uint256 i, uint256 j) public onlyOwner view returns (uint256) {
        return i + j;
    }

    function multiply(uint256 i, uint256 j) public onlyOwner view returns (uint256) {
        return i * j;
    }
}

{
  "compilationTarget": {
    "Yawn.sol": "Yawn"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}