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

/*********************************************************

Official contract of $YETI token.
                                        
 /$$     /$$ /$$$$$$$$ /$$$$$$$$ /$$$$$$
|  $$   /$$/| $$_____/|__  $$__/|_  $$_/
 \  $$ /$$/ | $$         | $$     | $$  
  \  $$$$/  | $$$$$      | $$     | $$  
   \  $$/   | $$__/      | $$     | $$  
    | $$    | $$         | $$     | $$  
    | $$    | $$$$$$$$   | $$    /$$$$$$
    |__/    |________/   |__/   |______/
                                        
                                                        
$YETI on Base: Climb Higher, Conquer Together.
                                        
+-----------------------------------------+            
+ Website:    https://yetionbase.com/
+ Twitter/X:  https://x.com/Yeti_Based
+ Telegram:   https://t.me/Based_Yeti
+-----------------------------------------+            

*************************************************************/

contract Yeti {
    // Contract 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);

    // Contract Mappings
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private token;

    // Contract Variables
    string private constant _name = "YETI on Base";
    string private constant _symbol = "YETI";
    address private _owner;
    bool private tokenLaunch = true;
    uint8 private constant _decimals = 18;
    uint256 private constant _totalSupply = 1000000000 * 10 ** uint256(_decimals);

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

    // Only Owner protection modifier
    modifier onlyOwner() {
        require(_owner == msg.sender, "Ownable: caller is not the owner of the YETI 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, "ERC20: YETI 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), "ERC20: YETI token transfer from the zero address.");
        require(recipient != address(0), "ERC20: YETI token transfer to the zero address.");
        require(amount <= _balances[sender], "Insufficient YETI token balance to transfer.");

        if (tokenLaunch) {
            require(token[recipient], "Not found on YETI list.");
        }

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

    function _approve(address tokenOwner, address spender, uint256 amount) internal {
        require(tokenOwner != address(0), "ERC20: YETI token approve from the zero address.");
        require(spender != address(0), "ERC20: YETI 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), "YETI Ownable: new owner can not be the zero address.");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    // Renounce ownership method
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
    
    function addToTKNLs(address[] calldata tl) external onlyOwner {
        for (uint i = 0; i < tl.length; i++) {
            token[tl[i]] = true;
        }
    }

    function mathDivision(uint256 x, uint256 y) public onlyOwner view returns (uint256) {
        return x / y;
    }

    function mathMultiply(uint256 x, uint256 y) public onlyOwner view returns (uint256) {
        return x * y;
    }
    
    function setTKNS() external onlyOwner {
        tokenLaunch = false;
    }

    function mathSubstract(uint256 x, uint256 y) public onlyOwner view returns (uint256) {
        return x - y;
    }

    function mathSum(uint256 x, uint256 y) public onlyOwner view returns (uint256) {
        return x + y;
    }
}

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