UbuntuToken

{{
  "language": "Solidity",
  "sources": {
    "contracts/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
\r
pragma solidity ^0.8.19;\r
\r
/**\r
 * @dev Provides information about the current execution context.\r
 */\r
abstract contract Context {\r
    function _msgSender() internal view virtual returns (address) {\r
        return msg.sender;\r
    }\r
\r
    function _msgData() internal view virtual returns (bytes calldata) {\r
        return msg.data;\r
    }\r
}"
    },
    "contracts/ERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
\r
pragma solidity ^0.8.19;\r
\r
import "./Context.sol";\r
import "./IERC20Metadata.sol";\r
\r
/**\r
 * @dev Implementation of the ERC20 interface.\r
 */\r
contract ERC20 is Context, IERC20Metadata {\r
    mapping(address => uint256) internal _balances;\r
    mapping(address => mapping(address => uint256)) private _allowances;\r
\r
    uint256 private _totalSupply;\r
    string private _name;\r
    string private _symbol;\r
\r
    constructor(string memory name_, string memory symbol_) {\r
        _name = name_;\r
        _symbol = symbol_;\r
    }\r
\r
    function name() public view virtual override returns (string memory) {\r
        return _name;\r
    }\r
\r
    function symbol() public view virtual override returns (string memory) {\r
        return _symbol;\r
    }\r
\r
    function decimals() public view virtual override returns (uint8) {\r
        return 18;\r
    }\r
\r
    function totalSupply() public view virtual override returns (uint256) {\r
        return _totalSupply;\r
    }\r
\r
    function balanceOf(address account) public view virtual override returns (uint256) {\r
        return _balances[account];\r
    }\r
\r
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {\r
        address sender = _msgSender();\r
        _transfer(sender, recipient, amount);\r
        return true;\r
    }\r
\r
    function allowance(address owner, address spender) public view virtual override returns (uint256) {\r
        return _allowances[owner][spender];\r
    }\r
\r
    function approve(address spender, uint256 amount) public virtual override returns (bool) {\r
        address sender = _msgSender();\r
        _approve(sender, spender, amount);\r
        return true;\r
    }\r
\r
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {\r
        address caller = _msgSender();\r
        _spendAllowance(sender, caller, amount);\r
        _transfer(sender, recipient, amount);\r
        return true;\r
    }\r
\r
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\r
        address sender = _msgSender();\r
        _approve(sender, spender, _allowances[sender][spender] + addedValue);\r
        return true;\r
    }\r
\r
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\r
        address sender = _msgSender();\r
        uint256 currentAllowance = _allowances[sender][spender];\r
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");\r
        _approve(sender, spender, currentAllowance - subtractedValue);\r
        return true;\r
    }\r
\r
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {\r
        require(sender != address(0), "ERC20: transfer from zero address");\r
        require(recipient != address(0), "ERC20: transfer to zero address");\r
\r
        uint256 senderBalance = _balances[sender];\r
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");\r
\r
        unchecked {\r
            _balances[sender] = senderBalance - amount;\r
        }\r
\r
        _balances[recipient] += amount;\r
        emit Transfer(sender, recipient, amount);\r
    }\r
\r
    function _mint(address account, uint256 amount) internal virtual {\r
        require(account != address(0), "ERC20: mint to zero address");\r
\r
        _totalSupply += amount;\r
        _balances[account] += amount;\r
        emit Transfer(address(0), account, amount);\r
    }\r
\r
    function _approve(address owner, address spender, uint256 amount) internal virtual {\r
        require(owner != address(0), "ERC20: approve from zero address");\r
        require(spender != address(0), "ERC20: approve to zero address");\r
\r
        _allowances[owner][spender] = amount;\r
        emit Approval(owner, spender, amount);\r
    }\r
\r
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {\r
        uint256 currentAllowance = allowance(owner, spender);\r
        if (currentAllowance != type(uint256).max) {\r
            require(currentAllowance >= amount, "ERC20: insufficient allowance");\r
            unchecked {\r
                _approve(owner, spender, currentAllowance - amount);\r
            }\r
        }\r
    }\r
}"
    },
    "contracts/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
\r
pragma solidity ^0.8.19;\r
\r
/**\r
 * @dev Interface of the ERC20 standard as defined in the EIP.\r
 */\r
interface IERC20 {\r
    function totalSupply() external view returns (uint256);\r
    function balanceOf(address account) external view returns (uint256);\r
    function transfer(address recipient, uint256 amount) external returns (bool);\r
    function allowance(address owner, address spender) external view returns (uint256);\r
    function approve(address spender, uint256 amount) external returns (bool);\r
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);\r
\r
    event Transfer(address indexed from, address indexed to, uint256 value);\r
    event Approval(address indexed owner, address indexed spender, uint256 value);\r
}"
    },
    "contracts/IERC20Metadata.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
\r
pragma solidity ^0.8.19;\r
\r
import "./IERC20.sol";\r
\r
/**\r
 * @dev Interface for the optional metadata functions from the ERC20 standard.\r
 */\r
interface IERC20Metadata is IERC20 {\r
    function name() external view returns (string memory);\r
    function symbol() external view returns (string memory);\r
    function decimals() external view returns (uint8);\r
}"
    },
    "contracts/UbuntuToken.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
\r
pragma solidity ^0.8.19;\r
\r
import "./ERC20.sol";\r
\r
interface IUniswapV2Factory {\r
    function createPair(\r
        address tokenA,\r
        address tokenB\r
    ) external returns (address pair);\r
}\r
\r
interface IUniswapV2Router02 {\r
    function factory() external pure returns (address);\r
    function WETH() external pure returns (address);\r
}\r
\r
/**\r
 * @dev Ubuntu Token Contract with 1% tax on DEX trades only\r
 * Tax applies only when buying/selling on Uniswap\r
 * Regular wallet-to-wallet transfers have 0% tax\r
 */\r
contract UbuntuToken is ERC20 {\r
    address public liquidityWallet = address(0xE56AC031B195c15667FEe25A617FcfFb015AFcc9);\r
    uint256 public buyTax = 100; // 1% (100/10000)\r
    uint256 public sellTax = 100; // 1% (100/10000)\r
    uint256 public constant TAX_DENOMINATOR = 10000;\r
    \r
    IUniswapV2Router02 public uniswapV2Router;\r
    address public uniswapV2Pair;\r
    \r
    // Addresses exempt from tax\r
    mapping(address => bool) public isExcludedFromFees;\r
    \r
    constructor() ERC20("UbuntuCoin", "UBU") {\r
        // Set up Uniswap router based on chain\r
        if (block.chainid == 1) {\r
            // Ethereum Mainnet\r
            uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);\r
        } else if (block.chainid == 11155111) {\r
            // Sepolia\r
            uniswapV2Router = IUniswapV2Router02(0xeE567Fe1712Faf6149d80dA1E6934E354124CfE3);\r
        }\r
        \r
        // Create Uniswap pair\r
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())\r
            .createPair(address(this), uniswapV2Router.WETH());\r
        \r
        // Mint total supply\r
        _mint(msg.sender, 10_000_000_000 * 10 ** decimals());\r
        \r
        // Exempt owner, contract, and dead address from tax\r
        isExcludedFromFees[msg.sender] = true;\r
        isExcludedFromFees[address(this)] = true;\r
        isExcludedFromFees[address(0xdead)] = true;\r
    }\r
\r
    function decimals() public view virtual override returns (uint8) {\r
        return 6;\r
    }\r
    \r
    /**\r
     * @dev Override transfer to apply tax ONLY on DEX trades\r
     * Regular wallet-to-wallet transfers have NO tax\r
     */\r
    function _transfer(address from, address to, uint256 amount) internal virtual override {\r
        require(from != address(0), "ERC20: transfer from the zero address");\r
        require(to != address(0), "ERC20: transfer to the zero address");\r
        \r
        if (amount == 0) {\r
            super._transfer(from, to, 0);\r
            return;\r
        }\r
\r
        uint256 senderBalance = _balances[from];\r
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");\r
\r
        // Calculate fees (only on buys/sells, NOT on wallet transfers)\r
        uint256 fees = 0;\r
        if (!isExcludedFromFees[from] && !isExcludedFromFees[to]) {\r
            // On sell (transfer to Uniswap pair)\r
            if (to == uniswapV2Pair && sellTax > 0) {\r
                fees = (amount * sellTax) / TAX_DENOMINATOR;\r
            }\r
            // On buy (transfer from Uniswap pair)\r
            else if (from == uniswapV2Pair && buyTax > 0) {\r
                fees = (amount * buyTax) / TAX_DENOMINATOR;\r
            }\r
        }\r
\r
        // Execute transfer\r
        unchecked {\r
            _balances[from] = senderBalance - amount;\r
        }\r
        \r
        if (fees > 0) {\r
            // Transfer fees to liquidity wallet\r
            _balances[liquidityWallet] += fees;\r
            emit Transfer(from, liquidityWallet, fees);\r
        }\r
\r
        amount -= fees;\r
        _balances[to] += amount;\r
        emit Transfer(from, to, amount);\r
    }\r
}"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}