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

contract TonOnBase {
    using SafeMath for uint256;

    string public name = "Ton On Base";
    string public symbol = "TONB";
    uint8 public decimals = 18;
    uint256 public totalSupply;
    address public owner;
    address public taxWallet;
    uint256 public transactionTax = 0; // initially 0%

    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed tokenOwner, address indexed spender, uint256 value);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    event TaxWalletUpdated(address indexed previousTaxWallet, address indexed newTaxWallet);
    event TransactionTaxUpdated(uint256 previousTax, uint256 newTax);

    modifier onlyOwner() {
        require(msg.sender == owner, "Caller is not the owner");
        _;
    }

    constructor() {
        owner = msg.sender;
        taxWallet = msg.sender;
        totalSupply = 5_107_694_825 * 10**uint256(decimals);
        balanceOf[msg.sender] = totalSupply;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

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

    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0), "New owner is the zero address");
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

    function setTaxWallet(address _taxWallet) public onlyOwner {
        require(_taxWallet != address(0), "New tax wallet is the zero address");
        emit TaxWalletUpdated(taxWallet, _taxWallet);
        taxWallet = _taxWallet;
    }

    function setTransactionTax(uint256 _transactionTax) public onlyOwner {
        require(_transactionTax <= 100, "Transaction tax cannot exceed 100%");
        emit TransactionTaxUpdated(transactionTax, _transactionTax);
        transactionTax = _transactionTax;
    }

    function transfer(address to, uint256 value) public returns (bool) {
        uint256 taxAmount = value.mul(transactionTax).div(100);
        uint256 netAmount = value.sub(taxAmount);

        _transfer(msg.sender, to, netAmount);
        if (taxAmount > 0) {
            _transfer(msg.sender, taxWallet, taxAmount);
        }
        return true;
    }

    function approve(address spender, uint256 value) public returns (bool) {
        allowance[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) public returns (bool) {
        require(allowance[from][msg.sender] >= value, "Allowance too low");
        allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);

        uint256 taxAmount = value.mul(transactionTax).div(100);
        uint256 netAmount = value.sub(taxAmount);

        _transfer(from, to, netAmount);
        if (taxAmount > 0) {
            _transfer(from, taxWallet, taxAmount);
        }
        return true;
    }

    function _transfer(address from, address to, uint256 value) internal {
        require(to != address(0), "Transfer to the zero address");
        require(balanceOf[from] >= value, "Balance too low");

        balanceOf[from] = balanceOf[from].sub(value);
        balanceOf[to] = balanceOf[to].add(value);

        emit Transfer(from, to, value);
    }

    receive() external payable {}

    function _approve(address tokenOwner, address spender, uint256 amount) internal {
        require(tokenOwner != address(0), "Approve from the zero address");
        require(spender != address(0), "Approve to the zero address");

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

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        uint256 c = a - b;
        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        uint256 c = a / b;
        return c;
    }
}

{
  "compilationTarget": {
    "TONB 3.sol": "TonOnBase"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}