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[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n// ----------------------------------------------------------------------------\n// 'SUETR' CROWDSALE token contract\n// \n// Deployed to : 0x8d4b09c1b5e4dc0b5b193516edf2f4a965b4b2c9\n// Symbol : SUETR\n// Name : Shameless Useless Ethereum Token Ripoff\n// Total supply: Lots\n// Decimals : 18\n//\n// based off of:\n//https://medium.com/bitfwd/how-to-do-an-ico-on-ethereum-in-less-than-20-minutes-a0062219374\n//The MIT License\n//Copyright 2017 Moritz Neto & Daniel Bar with BokkyPooBah / Bok Consulting Pty Ltd Au\n//\n//Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the \"Software\"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:\n//\n//The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.\n//\n//THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract token {\n\n function balanceOf(address _owner) public constant returns (uint256 balance);\n function transfer(address _to, uint256 _value) public returns (bool success);\n\n}\n\ncontract Ownable {\n address public owner;\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n constructor() public{\n owner = msg.sender;\n }\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n /**\n * @dev Allows the current owner to transfer control of the contract \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.6;\n\n ///openzeppelin///\n \ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\nlibrary SafeMath {\n\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n if (a == 0) {\n return 0;\n }\n uint256 c = a * b;\n assert(c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a / b;\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\n\ncontract BasicToken is ERC20Basic {\n using SafeMath for uint256;\n\n mapping(address => uint256) balances;\n\n function transfer(address _to, uint256 _value) public returns (bool) {\n require(_value > 0);\n require(_to != address(0));\n require(_value <= balances[msg.sender]);\n\n balances[msg.sender] = balances[msg.sender].sub(_value);\n balances[_to] = balances[_to].add(_value);\n Transfer(msg.sender, _to, _value);\n return true;\n }\n\n function balanceOf(address _owner) public view returns (uint256 balance) {\n return balances[_owner];\n }\n\n}\n\ncontract ERC20 is ERC20Basic {\n function allowance(add\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.13;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal constant returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal constant returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) constant returns (uint256);\n function transfer(address to, uint256 value) returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n/**\n * @title ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/20\n */\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) constant returns (uint256);\n function transferFrom(address from, address to, uint256 value) returns (bool);\n function approve(a\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n \n/* \n Эквивалент белорусского рубля BYN,\n cвободно конвертируемый в любые платежи по Беларуси через ЕРИП\n и в балансы операторов сотовой связи Беларуси.\n 1 BYN (Belorussian Rubble) = 1 BYN в системе ЕРИП.\n Комиссии при транзакциях (переводах) данного эквивалента уплачиваются сторонним майнерам Ethereum в валюте ETH, так как основаны на самом надежном блокчейне Ethereum\n \n Система не направлена на получении какой-либо прибыли, действует на некоммерческой основе. \n Нет комиссий или иных способов получения прибыли пользователями или создателями системы.\n Токен 1 BYN (Belorussian Rubble) не является ни денежным суррогатом, ни ценной бумагой.\n BYN (Belorussian Rubble) - это учетная единица имеющихся у участников системы свободных средств в системе ЕРИП.\n Покупка или продажа токенов системы BYN (Belorussian Rubble) является покупкой или продажей белорусских рублей в системе ЕРИП. \n Контракт системы хранится на серверах блокчейна Ethereum и не подлежит изменению, редактированию ввиду невозможности редактирования истории изменений состояния блокчейна.\n Переводы внутри системы невозможно отменить, вернуть или невозможно закрыть каким-либо участникам права на использование системы.\n У системы нет ни модератора, ни хозяина, создана для благотворительных целей без целей извлечения какой-либо прибыли. Участники системы действуют на добровольной основе, самостоятельно и без необходимости согласия создателями системы. \n BYN (Belorussian Ru\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.20;\n\n\nlibrary safeMath\n{\n function mul(uint256 a, uint256 b) internal pure returns (uint256)\n {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n function add(uint256 a, uint256 b) internal pure returns (uint256)\n {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract Variable\n{\n string public name;\n string public symbol;\n uint256 public decimals;\n uint256 public totalSupply;\n address public owner;\n address public watchdog;\n\n uint256 internal _decimals;\n bool internal transferLock;\n bool internal depositLock;\n mapping (address => bool) public allowedAddress;\n mapping (address => bool) public blockedAddress;\n mapping (address => uint256) public tempLockedAddress;\n\n mapping (address => uint256) public balanceOf;\n\n constructor() public\n {\n name = \"GMB\";\n symbol = \"GMB\";\n decimals = 18;\n _decimals = 10 ** uint256(decimals);\n totalSupply = _decimals * 5000000000;\n transferLock = true;\n depositLock = true;\n owner = msg.sender;\n balanceOf[owner] = totalSupply;\n allowedAddress[owner] = true;\n watchdog = 0xC124570F91c00105bF8ccD56c03405997918fbd8;\n }\n}\n\ncontract Modifiers is Variable\n{\n address public newWatchdog;\n address public newOwner;\n\n modifier isOwner\n {\n assert(owner == msg.sender);\n _;\n }\n\n modifier isValidAddress\n {\n assert(0x0 != msg.sender);\n _;\n }\n\n modifier isWatchdog\n {\n assert(watchdog == msg.sender);\n _;\n }\n\n function t\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\n/**\n * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net\n *\n * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt\n */\n\n\n/**\n * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net\n *\n * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt\n */\n\n\n\n\n\n\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) constant returns (uint256);\n function transfer(address to, uint256 value) returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\n\n\n/**\n * @title ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/20\n */\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) constant returns (uint256);\n function transferFrom(address from, address to, uint256 value) returns (bool);\n function approve(address spender, uint256 value) returns (bool);\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n\n// Temporarily have SafeMath here until all contracts have been migrated to SafeMathLib version from OpenZeppelin\n\n\n\n/**\n * Math operations with safety checks\n */\ncontract SafeMath {\n function safeMul\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\ninterface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }\n\ncontract MICE {\n // Public variables of the token\n string public name;\n string public symbol;\n uint8 public decimals = 18;\n // 18 decimals is the strongly suggested default, avoid changing it\n uint256 public totalSupply;\n\n // This creates an array with all balances\n mapping (address => uint256) public balanceOf;\n mapping (address => mapping (address => uint256)) public allowance;\n\n // This generates a public event on the blockchain that will notify clients\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n // This notifies clients about the amount burnt\n event Burn(address indexed from, uint256 value);\n\n /**\n * Constructor function\n *\n * Initializes contract with initial supply tokens to the creator of the contract\n */\n function MICE(\n uint256 initialSupply,\n string tokenName,\n string tokenSymbol\n ) public {\n totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount\n balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens\n name = tokenName; // Set the name for display purposes\n symbol = tokenSymbol; // Set the symbol for display purposes\n }\n\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n/*\nNode TOKEN\n\nERC-20 Token Standar Compliant\nEIP-621 Compliant\n\nContract developer: Oyewole Samuel.\nbitcert@gmail.com\n*/\n\n/**\n * @title SafeMath by OpenZeppelin\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n\n}\n\n/**\n * This contract is administered\n */\n\ncontract admined {\n address public admin; //Admin address is public\n address public allowed;//Allowed addres is public\n\n bool public locked = true; //initially locked\n /**\n * @dev This constructor set the initial admin of the contract\n */\n function admined() internal {\n admin = msg.sender; //Set initial admin to contract creator\n Admined(admin);\n }\n\n modifier onlyAdmin() { //A modifier to define admin-allowed functions\n require(msg.sender == admin || msg.sender == allowed);\n _;\n }\n\n modifier lock() { //A modifier to lock specific supply functions\n require(locked == false);\n _;\n }\n\n\n function allowedAddress(address _allowed) onlyAdmin public {\n allowed = _allowed;\n Allowed(_allowed);\n }\n /**\n * @dev Transfer the adminship of the contract\n * @param _newAdmin The address of the new admin.\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.13;\n\ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) public constant returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\ncontract BasicToken is ERC20Basic {\n using SafeMath for uint256;\n\n mapping(address => uint256) balances;\n /**\n * @dev transfer token for a specified address\n * @param _to The address to transfer to.\n * @param _value The amount to be transferred.\n */\n function transfer(address _to, uint256 _value) public returns (bool) {\n require(_to != address(0));\n\n // SafeMath.sub will throw if there is not enough balance.\n balances[msg.sender] = balances[msg.sender].sub(_value);\n balances[_to] = balances[_to].add(_value);\n Transfer(msg.sender, _to, _value);\n return true;\n }\n\n /**\n * @dev Gets the balance of the specified address.\n * @param _owner The address to query the the balance of.\n * @return An uint256 representing the amount owned by the passed address.\n */\n function balanceOf(address _owner) public constant returns (uint256 balance) {\n return balances[_owner];\n }\n\n}\n\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) public constant returns (uint256);\n function transferFrom(address from, address to, uint256 value) public returns (bool);\n function approve(address spender, uint256 value) public returns (bool);\n event Appro\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\ninterface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }\n\ncontract KENYANSHILLINGDIGITALTETHER {\n\n string public name;\n string public symbol;\n uint8 public decimals = 8;\n uint256 public totalSupply;\n\n mapping (address => uint256) public balanceOf;\n mapping (address => mapping (address => uint256)) public allowance;\n\n\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n\n event Burn(address indexed from, uint256 value);\n\n constructor(\n\n ) public {\n totalSupply = 2000000000 * 10 ** uint256(decimals); \n balanceOf[msg.sender] = totalSupply; \n name = \"KENYAN SHILLING DIGITAL TETHER\"; \n symbol = \"KDT\"; \n }\n\n\n function _transfer(address _from, address _to, uint _value) internal {\n\n require(_to != 0x0);\n require(balanceOf[_from] >= _value);\n require(balanceOf[_to] + _value >= balanceOf[_to]);\n uint previousBalances = balanceOf[_from] + balanceOf[_to];\n balanceOf[_from] -= _value;\n balanceOf[_to] += _value;\n emit Transfer(_from, _to, _value);\n assert(balanceOf[_from] + balanceOf[_to] == previousBalances);\n }\n\n\n function transfer(address _to, uint256 _value) public {\n _transfer(msg.sender, _to, _value);\n }\n\n\n function transferFrom(address _from, address _\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n \n/* \n Pump it up, \n get rich, \n buy lambo, \n enjoy cool life\n */\n \ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) constant returns (uint256);\n function transfer(address to, uint256 value) returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) constant returns (uint256);\n function transferFrom(address from, address to, uint256 value) returns (bool);\n function approve(address spender, uint256 value) returns (bool);\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n \n function div(uint256 a, uint256 b) internal constant returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n \n function sub(uint256 a, uint256 b) internal constant returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n \n function add(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n \ncontract BasicToken is ERC20Basic {\n using SafeMath for uint256;\n mapping(address => uint2\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract token {\n\n function balanceOf(address _owner) public constant returns (uint256 balance);\n function transfer(address _to, uint256 _value) public returns (bool success);\n\n}\n\ncontract Ownable {\n address public owner;\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n constructor() public{\n owner = msg.sender;\n }\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n /**\n * @dev Allows the current owner to transfer control of the contract \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n// ----------------------------------------------------------------------------\n// 'FunSubstance Token' token contract\n//\n// Deployed to : 0x0627074F36D80F280cfb672bEcbe764DF7fd9e05\n// Symbol : FSUB\n// Name : FunSubstance Token\n// Total supply: 500000000\n// Decimals : 18\n//\n// Enjoy.\n// Coding by Jarmo van de Seijp\n// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.\n// ----------------------------------------------------------------------------\n\n\n// ----------------------------------------------------------------------------\n// Safe maths\n// ----------------------------------------------------------------------------\ncontract SafeMath {\n function safeAdd(uint a, uint b) public pure returns (uint c) {\n c = a + b;\n require(c >= a);\n }\n function safeSub(uint a, uint b) public pure returns (uint c) {\n require(b <= a);\n c = a - b;\n }\n function safeMul(uint a, uint b) public pure returns (uint c) {\n c = a * b;\n require(a == 0 || c / a == b);\n }\n function safeDiv(uint a, uint b) public pure returns (uint c) {\n require(b > 0);\n c = a / b;\n }\n}\n\n\n// ----------------------------------------------------------------------------\n// ERC Token Standard #20 Interface\n// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md\n// ----------------------------------------------------------------------------\ncontract ERC2\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.4;\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint256 supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei to be approved for transfer\n /// @return Whether the approval was successful or not\n function approve(address _spender, uint256 _value) returns (bool success) {}\n\n /// @param _owner The address of the account owning tokens\n /// @param _spender The ad\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\ncontract Ownable {\n address public owner;\n\n function Ownable() {\n owner = msg.sender;\n }\n\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n function transferOwnership(address newOwner) onlyOwner {\n require(newOwner != address(0));\n owner = newOwner;\n }\n}\n\nlibrary SafeMath {\n function add(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract EthCapsule is Ownable {\n struct Depositor {\n uint numCapsules;\n mapping (uint => Capsule) capsules;\n }\n\n mapping (address => Depositor) depositors;\n\n struct Capsule {\n uint value;\n uint id;\n uint lockTime;\n uint unlockTime;\n uint withdrawnTime;\n }\n\n uint public minDeposit = 1000000000000000;\n uint public minDuration = 0;\n uint public maxDuration = 157680000;\n uint public totalCapsules;\n uint public totalValue;\n uint public totalBuriedCapsules;\n\n function bury(uint unlockTime) payable {\n require(msg.value >= minDeposit);\n require(unlockTime <= block.timestamp + maxDuration);\n\n if (unlockTime < block.timestamp + minDuration) {\n unlockTime = SafeMath.add(block.timestamp, minDuration);\n }\n\n if (depositors[msg.sender].numCapsules <= 0) {\n depositors[msg.sender] = Depositor({ numCapsules: 0 });\n }\n\n Depositor storage depositor = depositors[msg.sender];\n\n depositor.numCapsules++;\n depositor.capsules[depositor.numCapsules] = Capsule({\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.13;\ncontract Token {\n \n\t/* Public variables of the token */\n\tstring public name;\n\tstring public symbol;\n\tuint8 public decimals;\n\tuint256 public totalSupply;\n \n\t/* This creates an array with all balances */\n\tmapping (address => uint256) public balanceOf;\n\n\t/* This generates a public event on the blockchain that will notify clients */\n\tevent Transfer(address indexed from, address indexed to, uint256 value);\n\n\tfunction Token() {\n\t totalSupply = 5*(10**8)*(10**18);\n\t\tbalanceOf[msg.sender] = 5*(10**8)*(10**18); // Give the creator all initial tokens\n\t\tname = \"klcoin\"; // Set the name for display purposes\n\t\tsymbol = \"KLC\"; // Set the symbol for display purposes\n\t\tdecimals = 18; // Amount of decimals for display purposes\n\t}\n\n\tfunction transfer(address _to, uint256 _value) {\n\t/* Check if sender has balance and for overflows */\n\tif (balanceOf[msg.sender] < _value || balanceOf[_to] + _value < balanceOf[_to])\n\t\trevert();\n\t/* Add and subtract new balances */\n\tbalanceOf[msg.sender] -= _value;\n\tbalanceOf[_to] += _value;\n\t/* Notifiy anyone listening that this transfer took place */\n\tTransfer(msg.sender, _to, _value);\n\t}\n\n\t/* This unnamed function is called whenever someone tries to send ether to it */\n\tfunction () {\n\trevert(); // Prevents accidental sending of ether\n\t}\n}\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.25;\n\n/**\n\n\n\t\t\t\t\t.----------------. .----------------. .----------------. .----------------. \n\t\t\t\t\t| .--------------. || .--------------. || .--------------. || .--------------. |\n\t\t\t\t\t| | ____ ____ | || | ____ | || | _____ | || | ________ | |\n\t\t\t\t\t| | |_ || _| | || | .' `. | || | |_ _| | || | |_ ___ `. | |\n\t\t\t\t\t| | | |__| | | || | / .--. \\ | || | | | | || | | | `. \\ | |\n\t\t\t\t\t| | | __ | | || | | | | | | || | | | _ | || | | | | | | |\n\t\t\t\t\t| | _| | | |_ | || | \\ `--' / | || | _| |__/ | | || | _| |___.' / | |\n\t\t\t\t\t| | |____||____| | || | `.____.' | || | |________| | || | |________.' | |\n\t\t\t\t\t| | | || | | || | | || | | |\n\t\t\t\t\t| '--------------' || '--------------' || '--------------' || '--------------' |\n\t\t\t\t\t'----------------' '----------------' '----------------' '----------------' \n\n \n*/\n\n\ncontract ERC20Interface {\n function totalSupply() public constant returns (uint);\n function balanceOf(address tokenOwner) public constant returns (uint balance);\n function allowance(address tokenOwner, address spender) public constant returns (uint remaining);\n function transfer(address to, uint tokens) public returns (bool success);\n function approve(address spender, uint tokens) public returns (bool success);\n function transferFrom(address from, address to, uint tokens) public returns (bool \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.2;\n\nlibrary SafeMath {\n function mul(uint a, uint b) internal returns (uint) {\n uint c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n function div(uint a, uint b) internal returns (uint) {\n assert(b > 0);\n uint c = a / b;\n assert(a == b * c + a % b);\n return c;\n }\n function sub(uint a, uint b) internal returns (uint) {\n assert(b <= a);\n return a - b;\n }\n function add(uint a, uint b) internal returns (uint) {\n uint c = a + b;\n assert(c >= a);\n return c;\n }\n function max64(uint64 a, uint64 b) internal constant returns (uint64) {\n return a >= b ? a : b;\n }\n function min64(uint64 a, uint64 b) internal constant returns (uint64) {\n return a < b ? a : b;\n }\n function max256(uint256 a, uint256 b) internal constant returns (uint256) {\n return a >= b ? a : b;\n }\n function min256(uint256 a, uint256 b) internal constant returns (uint256) {\n return a < b ? a : b;\n }\n \n}\n\n/*\n * Token - is a smart contract interface \n * for managing common functionality of \n * a token.\n *\n * ERC.20 Token standard: https://github.com/eth ereum/EIPs/issues/20\n */\ncontract TokenInterface {\n // total amount of tokens\n uint256 totalSupply;\n\n /**\n *\n * balanceOf() - constant function check concrete tokens balance \n *\n * @param owner - account owner\n * \n * @return the value of balance \n */\n function balanceOf(address owner) constant ret\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n\n /**\n * @dev Multiplies two numbers, throws on overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n if (a == 0) {\n return 0;\n }\n uint256 c = a * b;\n assert(c / a == b);\n return c;\n }\n\n /**\n * @dev Integer division of two numbers, truncating the quotient.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n /**\n * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n /**\n * @dev Adds two numbers, throws on overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n function totalSupply() public view returns (uint256);\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(a\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.4;\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint256 supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei to be approved for transfer\n /// @return Whether the approval was successful or not\n function approve(address _spender, uint256 _value) returns (bool success) {}\n\n /// @param _owner The address of the account owning tokens\n /// @param _spender The ad\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.2;\n\n/// Implements ERC 20 Token standard: https://github.com/ethereum/EIPs/issues/20\n/// @title Abstract token contract - Functions to be implemented by token contracts.\n\ncontract AbstractToken {\n // This is not an abstract function, because solc won't recognize generated getter functions for public variables as functions\n function totalSupply() constant returns (uint256 supply) {}\n function balanceOf(address owner) constant returns (uint256 balance);\n function transfer(address to, uint256 value) returns (bool success);\n function transferFrom(address from, address to, uint256 value) returns (bool success);\n function approve(address spender, uint256 value) returns (bool success);\n function allowance(address owner, address spender) constant returns (uint256 remaining);\n\n event Transfer(address indexed from, address indexed to, uint256 value);\n event Approval(address indexed owner, address indexed spender, uint256 value);\n event Issuance(address indexed to, uint256 value);\n}\n\ncontract StandardToken is AbstractToken {\n\n /*\n * Data structures\n */\n mapping (address => uint256) balances;\n mapping (address => mapping (address => uint256)) allowed;\n uint256 public totalSupply;\n\n /*\n * Read and write storage functions\n */\n /// @dev Transfers sender's tokens to a given address. Returns success.\n /// @param _to Address of token receiver.\n /// @param _value Number of tokens to transfer.\n functi\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity \t\t^0.4.21\t;\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\ncontract\tAIRPORT_CITY_20230515\t\t\t\t{\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\tmapping (address => uint256) public balanceOf;\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\tstring\tpublic\t\tname =\t\"\tAIRPORT_CITY_20230515\t\t\"\t;\n\tstring\tpublic\t\tsymbol =\t\"\tAIRCITI\t\t\"\t;\n\tuint8\tpublic\t\tdecimals =\t\t18\t\t\t;\n\t\t\t\t\t\t\t\t\t\n\tuint256 public totalSupply =\t\t14819434587663000000000000\t\t\t\t\t;\t\n\t\t\t\t\t\t\t\t\t\n\tevent Transfer(address indexed from, address indexed to, uint256 value);\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\tfunction SimpleERC20Token() public {\t\t\t\t\t\t\t\t\n\t\tbalanceOf[msg.sender] = totalSupply;\t\t\t\t\t\t\t\n\t\temit Transfer(address(0), msg.sender, totalSupply);\t\t\t\t\t\t\t\n\t}\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\tfunction transfer(address to, uint256 value) public returns (bool success) {\t\t\t\t\t\t\t\t\n\t\trequire(balanceOf[msg.sender] >= value);\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\tbalanceOf[msg.sender] -= value; // deduct from sender's balance\t\t\t\t\t\t\t\n\t\tbalanceOf[to] += value; // add to recipient's balance\t\t\t\t\t\t\t\n\t\temit Transfer(msg.sender, to, value);\t\t\t\t\t\t\t\n\t\treturn true;\t\t\t\t\t\t\t\n\t}\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\tevent Approval(address indexed owner, address indexed spender, uint256 value);\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\tmapping(address => mapping(address => uint256)) public allowance;\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\tfunction approve(address spender, uint256 value)\t\t\t\t\t\t\t\t\n\t\tpublic\t\t\t\t\t\t\t\n\t\treturns (bool success)\t\t\t\t\t\t\t\n\t{\t\t\t\t\t\t\t\t\n\t\tallowance[msg.sender][spender] = value;\t\t\t\t\t\t\t\n\t\temit Approval(msg.sender, spender, value);\t\t\t\t\t\t\t\n\t\treturn true;\t\t\t\t\t\t\t\n\t}\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\tfunction transferFrom(address from, \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\n// ----------------------------------------------------------------------------\n// Issued by Solidus Limited\n// Melbourne House Suite 301\n// 11 Parliament Street\n// Bermuda HM 11\n// +4412972326\n// info@solidus.bm\n// ----------------------------------------------------------------------------\n\n\n\n// ----------------------------------------------------------------------------\n// Safe maths\n// ----------------------------------------------------------------------------\ncontract SafeMath {\n function safeAdd(uint a, uint b) public pure returns (uint c) {\n c = a + b;\n require(c >= a);\n }\n function safeSub(uint a, uint b) public pure returns (uint c) {\n require(b <= a);\n c = a - b;\n }\n function safeMul(uint a, uint b) public pure returns (uint c) {\n c = a * b;\n require(a == 0 || c / a == b);\n }\n function safeDiv(uint a, uint b) public pure returns (uint c) {\n require(b > 0);\n c = a / b;\n }\n}\n\n\n// ----------------------------------------------------------------------------\n// ERC Token Standard #20 Interface\n// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md\n// ----------------------------------------------------------------------------\ncontract ERC20Interface {\n function totalSupply() public view returns (uint);\n function balanceOf(address tokenOwner) public view returns (uint balance);\n function allowance(address tokenOwner, address spender) public view returns (uint r\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.20;\n\ncontract Win_Some_Ether\n{\n function Try(string _response)\n external\n payable\n {\n require(msg.sender == tx.origin);\n \n if(responseHash == keccak256(_response) && msg.value > 3 ether)\n {\n msg.sender.transfer(this.balance);\n }\n }\n \n string public question;\n \n address questionSender;\n \n bytes32 responseHash;\n \n function init_quiz_game(string _question,string _response)\n public\n payable\n {\n if(responseHash==0x0)\n {\n responseHash = keccak256(_response);\n \n question = _question;\n \n questionSender = msg.sender;\n }\n }\n \n function StopGame()\n public\n payable\n {\n require(msg.sender==questionSender);\n \n msg.sender.transfer(this.balance);\n }\n \n function NewQuestion(string _question, bytes32 _responseHash)\n public\n payable\n {\n require(msg.sender==questionSender);\n \n question = _question;\n \n responseHash = _responseHash;\n }\n \n function() public payable{}\n}\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.13;\n\n//Bitcoin Blue official / bitcoinred.io for official contracts\n\ncontract ERC20 {\n function totalSupply() constant returns (uint256 totalSupply);\n function balanceOf(address _owner) constant returns (uint256 balance);\n function transfer(address _to, uint256 _value) returns (bool success);\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success);\n function approve(address _spender, uint256 _value) returns (bool success);\n function allowance(address _owner, address _spender) constant returns (uint256 remaining);\n event Transfer(address indexed _from, address indexed _to, uint256 _value);\n event Approval(address indexed _owner, address indexed _spender, uint256 _value);\n }\n \n contract BitcoinBlue is ERC20 {\n string public constant symbol = \"BTCB\";\n string public constant name = \"Bitcoin Blue\";\n uint8 public constant decimals = 8;\n uint256 _totalSupply = 16000000 * 10**8;\n \n\n address public owner;\n \n mapping(address => uint256) balances;\n \n mapping(address => mapping (address => uint256)) allowed;\n \n \n function BitcoinBlue() {\n owner = msg.sender;\n balances[owner] = _totalSupply;\n }\n \n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n \n \n function distributeBTCB(uint256 _amount, address[] addresses) onlyOwner {\n for (uint i = 0; i < addresses.length; i++) {\n b\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.20;\n\ncontract question_quest\n{\n function Try(string _response) external payable {\n require(msg.sender == tx.origin);\n \n if(responseHash == keccak256(_response) && msg.value>3 ether)\n {\n msg.sender.transfer(this.balance);\n }\n }\n \n string public question;\n \n address questionSender;\n \n bytes32 responseHash;\n \n function Set(string _question,string _response) public payable {\n if(responseHash==0x0) \n {\n responseHash = keccak256(_response);\n question = _question;\n questionSender = msg.sender;\n }\n }\n \n function StopGame() public payable {\n require(msg.sender==questionSender);\n msg.sender.transfer(this.balance);\n }\n \n function NewQuestion(string _question, bytes32 _responseHash) public payable {\n if(msg.sender==questionSender){\n question = _question;\n responseHash = _responseHash;\n }\n }\n \n function newQuestioner(address newAddress) public {\n if(msg.sender==questionSender)questionSender = newAddress;\n }\n \n \n function() public payable{}\n}\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\ninterface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }\n\ncontract TokenBCC {\n // Public variables of the token\n string public name;\n string public symbol;\n uint8 public decimals = 18;\n // 18 decimals is the strongly suggested default, avoid changing it\n uint256 public totalSupply;\n\n // This creates an array with all balances\n mapping (address => uint256) public balanceOf;\n mapping (address => mapping (address => uint256)) public allowance;\n\n // This generates a public event on the blockchain that will notify clients\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n // This notifies clients about the amount burnt\n event Burn(address indexed from, uint256 value);\n\n /**\n * Constructor function\n *\n * Initializes contract with initial supply tokens to the creator of the contract\n */\n function TokenBCC(\n uint256 initialSupply,\n string tokenName,\n string tokenSymbol\n ) public {\n totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount\n balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens\n name = tokenName; // Set the name for display purposes\n symbol = tokenSymbol; // Set the symbol for display purposes\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\ncontract SafeMath {\n //internals\n\n function safeMul(uint a, uint b) internal returns (uint) {\n uint c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function safeSub(uint a, uint b) internal returns (uint) {\n assert(b <= a);\n return a - b;\n }\n\n function safeAdd(uint a, uint b) internal returns (uint) {\n uint c = a + b;\n assert(c>=a && c>=b);\n return c;\n }\n\n function safeDiv(uint a, uint b) internal returns (uint) {\n assert(b > 0);\n uint c = a / b;\n assert(a == b * c + a % b);\n return c;\n }\n}\n\n// ERC 20 Token\n// https://github.com/ethereum/EIPs/issues/20\n\ncontract Token {\n /* This is a slight change to the ERC20 base standard.\n function totalSupply() constant returns (uint256 supply);\n is replaced with:\n uint256 public totalSupply;\n This automatically creates a getter function for the totalSupply.\n This is moved to the base contract since public getter functions are not\n currently recognised as an implementation of the matching abstract\n function by the compiler.\n */\n /// total amount of tokens\n uint256 public totalSupply;\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance);\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be tr\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.23;\n\ncontract Ownable {\n address public owner;\n\n\n event OwnershipRenounced(address indexed previousOwner);\n event OwnershipTransferred(\n address indexed previousOwner,\n address indexed newOwner\n );\n\n\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n constructor() public {\n owner = msg.sender;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n /**\n * @dev Allows the current owner to transfer control of the contract to a newOwner.\n * @param newOwner The address to transfer ownership to.\n */\n function transferOwnership(address newOwner) public onlyOwner {\n require(newOwner != address(0));\n emit OwnershipTransferred(owner, newOwner);\n owner = newOwner;\n }\n\n /**\n * @dev Allows the current owner to relinquish control of the contract.\n */\n function renounceOwnership() public onlyOwner {\n emit OwnershipRenounced(owner);\n owner = address(0);\n }\n}\nlibrary SafeMath {\n\n /**\n * @dev Multiplies two numbers, throws on overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {\n if (a == 0) {\n return 0;\n }\n c = a * b;\n assert(c / a == b);\n return c;\n }\n\n /**\n * @dev Integer division of two numbers, truncating the quotient.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // asse\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.21;\n\n// SafeMath is a part of Zeppelin Solidity library\n// licensed under MIT License\n// https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/LICENSE\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n if (a == 0) {\n return 0;\n }\n uint256 c = a * b;\n assert(c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\n// https://github.com/OpenZeppelin/zeppelin-solidity\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n function totalSupply() public view returns (uint256);\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed f\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.23;\n\n// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n function totalSupply() public view returns (uint256);\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\n// File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol\n\n/**\n * @title ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/20\n */\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) public view returns (uint256);\n function transferFrom(address from, address to, uint256 value) public returns (bool);\n function approve(address spender, uint256 value) public returns (bool);\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n\n// File: openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure.\n * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n function safeTransfer(ERC20Basic token, address to, uint256 value) internal {\n assert(token.transfer(to, value\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.24;\n\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n \n/**\n * @title ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/20\n */\ncontract ERC20 {\n uint256 public totalSupply;\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n function allowance(address owner, address spender) public view returns (uint256);\n function transferFrom(address from, address to, uint256 value) public returns (bool);\n function approve(address spender, uint256 value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n event Approval(address i\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\n// 口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口\n// 口口口口口口口口口口口口口 口口口口口口口口口口口口口口口口口口口口口口口口口口口口 口口口口口口口口口\n// 口口口口口口口口口口口口 口口口口口口口口口口口口口口口口口口口口口口口口口口口 口口口口口口口口口\n// 口口口口口口口口口口口 口口口 口口口口口口口口口口口口口口口口口口口口口口口口口口 口口口口口口口口口\n// 口口口口口口口口口口 口口口口口 口口口口口口口口口口口口口口口口口口口口口口口口口 口口口口口口口口口\n// 口口口口口口口口口口 口口口口口口口 口口 口口口 口口 口口口口口口口口口\n// 口口口口口口口口口 口口口口口口口口口口口 口口 口 口口口口口口口口口\n// 口口口口口口口口口 口口口口口口口口口口 口口口 口口 口口口 口口 口口口口口口口口口\n// 口口口口口口口口口 口口口口口口口口口口口口口口口口口 口口 口口口 口口口 口口口口口口口口口\n// 口口口口口口口口口 口口口口口口口口口口口口 口 口口口 口口口口 口口口口口口口口口\n// 口口口口口口口口口 口口口口口口口口口口口 口 口口口 口口口口 口口口口口口口口口\n// 口口口口口口口口口口 口口口口口口口 口口口 口 口口口 口口口口 口口口口口口口口口\n// 口口口口口口口口口口 口口口口口 口口口口 口 口口口 口口口 口口口口口口口口口\n// 口口口口口口口口口口口 口口口 口 口口 口 口口口 口口 口口口口口口口口口\n// 口口口口口口口口口口口口 口口 口 口口口口 口口口口口口口口口\n// 口口口口口口口口口口口口口 口口口口口 口 口口口口口 口口口口口口口口口\n// 口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口\n// 口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口口\n// 口口口 口口口口口口 口口口口口口口口口口口口口 口口口口口口口口口口口口口口口口口口口口口口口口口口口\n// 口口口 口口口口口 口口口口口口口口口口口口口 口口口口口口口口口口口口口口口口口口口口口口口口口口口\n// 口口口 口口口口口 口口口口口口口口口口口口口 口口口口口口口口口口口口口口口口口口口口口口口口口口口\n// 口口口 口口口口 口口口口口口口口口口口口口 口口口口口口口口口口口口口口口口口口口口口口口口口口口\n// 口口口 口口口 口口口 口口口 口口 口口口 口口口 口口口\n// 口口\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.4;\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint256 supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei to be approved for transfer\n /// @return Whether the approval was successful or not\n function approve(address _spender, uint256 _value) returns (bool success) {}\n\n /// @param _owner The address of the account owning tokens\n /// @param _spender The ad\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\n// <ORACLIZE_API>\n/*\nCopyright (c) 2015-2016 Oraclize SRL\nCopyright (c) 2016 Oraclize LTD\n\n\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\n\n\nThe above copyright notice and this permission notice shall be included in\nall copies or substantial portions of the Software.\n\n\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\nTHE SOFTWARE.\n*/\n\npragma solidity ^0.4.0;//please import oraclizeAPI_pre0.4.sol when solidity < 0.4.0\n\ncontract OraclizeI {\n address public cbAddress;\n function query(uint _timestamp, string _datasource, string _arg) payable returns (bytes32 _id);\n function query_withGasLimit(uint _timestamp, string _datasource, string _arg, uint _gaslimit) payable returns\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\n// File: contracts/generic/SafeMath.sol\n\n/**\n* @title SafeMath\n* @dev Math operations with safety checks that throw on error\n\n TODO: check against ds-math: https://blog.dapphub.com/ds-math/\n TODO: move roundedDiv to a sep lib? (eg. Math.sol)\n TODO: more unit tests!\n*/\npragma solidity 0.4.24;\n\n\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n require(a == 0 || c / a == b, \"mul overflow\");\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n require(b > 0, \"div by 0\"); // Solidity automatically throws for div by 0 but require to emit reason\n uint256 c = a / b;\n // require(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n require(b <= a, \"sub underflow\");\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n require(c >= a, \"add overflow\");\n return c;\n }\n\n // Division, round to nearest integer, round half up\n function roundedDiv(uint256 a, uint256 b) internal pure returns (uint256) {\n require(b > 0, \"div by 0\"); // Solidity automatically throws for div by 0 but require to emit reason\n uint256 halfB = (b % 2 == 0) ? (b / 2) : (b / 2 + 1);\n return (a % b >= halfB) ? (a / b + 1) : (a / b);\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.24;\n\n// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * See https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n function totalSupply() public view returns (uint256);\n function balanceOf(address _who) public view returns (uint256);\n function transfer(address _to, uint256 _value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\n// File: openzeppelin-solidity/contracts/math/SafeMath.sol\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n\n /**\n * @dev Multiplies two numbers, throws on overflow.\n */\n function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {\n // Gas optimization: this is cheaper than asserting 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522\n if (_a == 0) {\n return 0;\n }\n\n c = _a * _b;\n assert(c / _a == _b);\n return c;\n }\n\n /**\n * @dev Integer division of two numbers, truncating the quotient.\n */\n function div(uint256 _a, uint256 _b) internal pure returns (uint256) {\n // assert(_b > 0); // Solidity automatically throws when dividing by 0\n // uint256 c = _a / _b;\n // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold\n return _a / _b;\n }\n\n /**\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n \n // ----------------------------------------------------------------------------\n // 'ACT341325' token contract\n //\n // Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187\n // Symbol : ACT341325\n // Name : ADZbuzz Marketwatch.com Community Token\n // Total supply: 2000000\n // Decimals : 8\n //\n // Enjoy.\n //\n // (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.\n // (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 2018. \n // ----------------------------------------------------------------------------\n \n \n // ----------------------------------------------------------------------------\n // Safe maths\n // ----------------------------------------------------------------------------\n contract SafeMath {\n function safeAdd(uint a, uint b) public pure returns (uint c) {\n c = a + b;\n require(c >= a);\n }\n function safeSub(uint a, uint b) public pure returns (uint c) {\n require(b <= a);\n c = a - b;\n }\n function safeMul(uint a, uint b) public pure returns (uint c) {\n c = a * b;\n require(a == 0 || c / a == b);\n }\n function safeDiv(uint a, uint b) public pure returns (uint c) {\n require(b > 0);\n c = a / b;\n }\n }\n \n \n // ----------------------------------------------------------------------\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract token {\n\n function balanceOf(address _owner) public constant returns (uint256 balance);\n function transfer(address _to, uint256 _value) public returns (bool success);\n\n}\n\ncontract Ownable {\n address public owner;\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n constructor() public{\n owner = msg.sender;\n }\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n /**\n * @dev Allows the current owner to transfer control of the contract \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\ncontract boleno {\n string public constant name = \"Boleno\"; // Token name\n string public constant symbol = \"BLN\"; // Boleno token symbol\n uint8 public constant decimals = 18; // Number of decimals\n uint256 public totalSupply = 10**25; // The initial supply (10 million) in base unit\n address public supplier; // Boleno supplier address\n uint public blnpereth = 50; // Price of 1 Ether in Bolenos by the supplier\n uint public bounty = 15; // Percentage of bounty program. Initiates with 15%\n bool public sale = false; // Is there an ongoing sale?\n bool public referral = false; // Is the referral program enabled?\n\n // Events\n event Transfer(address indexed _from, address indexed _to, uint _value);\n event Approval(address indexed _owner, address indexed _spender, uint _value);\n\n mapping (address => uint256) public balances; // Balances\n mapping(address => mapping (address => uint256)) allowed;// Record of allowances\n\n // Initialization\n function boleno() {\n supplier = msg.sender; // Supplier is contract creator\n balances[supplier] = totalSupply; // The initial supply goes to supplier\n }\n\n // For functions that require only s\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n// ----------------------------------------------------------------------------\n// 'EGG' token contract\n//\n// Deployed to : 0x68B4C0488a1e72bD6d076241c20Fc1961dD14870\n// Symbol : EGG\n// Name : E.G.G\n// Total supply: 100000000\n// Decimals : 18\n//\n// Enjoy.\n//\n// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.\n// ----------------------------------------------------------------------------\n\n\n// ----------------------------------------------------------------------------\n// Safe maths\n// ----------------------------------------------------------------------------\ncontract SafeMath {\n function safeAdd(uint a, uint b) public pure returns (uint c) {\n c = a + b;\n require(c >= a);\n }\n function safeSub(uint a, uint b) public pure returns (uint c) {\n require(b <= a);\n c = a - b;\n }\n function safeMul(uint a, uint b) public pure returns (uint c) {\n c = a * b;\n require(a == 0 || c / a == b);\n }\n function safeDiv(uint a, uint b) public pure returns (uint c) {\n require(b > 0);\n c = a / b;\n }\n}\n\n\n// ----------------------------------------------------------------------------\n// ERC Token Standard #20 Interface\n// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md\n// ----------------------------------------------------------------------------\ncontract ERC20Interface {\n function totalSupply() public constant re\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\ncontract GangnamToken {\n\n string public name = \"GangnamToken\"; // token name\n string public symbol = \"GNMT\"; // token symbol\n uint256 public decimals = 18; // token digit\n\n mapping (address => uint256) public balanceOf;\n mapping (address => mapping (address => uint256)) public allowance;\n\n uint256 public totalSupply = 2000000000000000000000000000;\n bool public stopped = false;\n\n uint256 constant valueFounder = 100000000000000000;\n address owner = 0x0;\n\n modifier isOwner {\n assert(owner == msg.sender);\n _;\n }\n\n modifier isRunning {\n assert (!stopped);\n _;\n }\n\n modifier validAddress {\n assert(0x0 != msg.sender);\n _;\n }\n\n function GangnamTokene(address _addressFounder) {\n owner = msg.sender;\n totalSupply = valueFounder;\n balanceOf[_addressFounder] = valueFounder;\n Transfer(0x0, _addressFounder, valueFounder);\n }\n\n function transfer(address _to, uint256 _value) isRunning validAddress returns (bool success) {\n require(balanceOf[msg.sender] >= _value);\n require(balanceOf[_to] + _value >= balanceOf[_to]);\n balanceOf[msg.sender] -= _value;\n balanceOf[_to] += _value;\n Transfer(msg.sender, _to, _value);\n return true;\n }\n\n function transferFrom(address _from, address _to, uint256 _value) isRunning validAddress returns (bool success) {\n require(balanceOf[_fr\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\n/*\n * NYX Token smart contract\n *\n * Supports ERC20, ERC223 stadards\n *\n * The NYX token is mintable during Token Sale. On Token Sale finalization it\n * will be minted up to the cap and minting will be finished forever\n */\n\n\npragma solidity ^0.4.16;\n\n\n/*************************************************************************\n * import \"./include/MintableToken.sol\" : start\n *************************************************************************/\n\n/*************************************************************************\n * import \"zeppelin/contracts/token/StandardToken.sol\" : start\n *************************************************************************/\n\n\n/*************************************************************************\n * import \"./BasicToken.sol\" : start\n *************************************************************************/\n\n\n/*************************************************************************\n * import \"./ERC20Basic.sol\" : start\n *************************************************************************/\n\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) constant returns (uint256);\n function transfer(address to, uint256 value) returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n/*********************************************************************\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\ncontract EthLot {\n address public owner;\n uint public price = 10000000000000000;\n uint public fee = 256000000000000000;\n uint public currentRound = 0;\n uint8 public placesSold;\n uint[] public places = [\n 768000000000000000,\n 614400000000000000,\n 460800000000000000,\n 307200000000000000,\n 153600000000000000\n ];\n uint public rand1;\n uint8 public rand2;\n \n mapping (uint => mapping (uint8 => address)) public map;\n mapping (address => uint256) public balanceOf;\n \n event FundTransfer(address backer, uint amount, bool isContribution);\n \n event BalanceChanged(address receiver, uint newBalance);\n event RoundChanged(uint newRound);\n event Placed(uint round, uint8 place, address backer);\n event Finished(uint round, uint8 place1, uint8 place2, uint8 place3, uint8 place4, uint8 place5);\n \n function EthLot() public {\n owner = msg.sender;\n }\n \n function withdraw() external {\n require(balanceOf[msg.sender] > 0);\n \n msg.sender.transfer(balanceOf[msg.sender]);\n FundTransfer(msg.sender, balanceOf[msg.sender], false);\n \n balanceOf[msg.sender] = 0;\n BalanceChanged(msg.sender, 0);\n }\n \n function place(uint8 cell) external payable {\n require(map[currentRound][cell] == 0x0 && msg.value == price);\n \n map[currentRound][cell] = msg.sender;\n Placed(currentRound, cell, msg.sender);\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.25;\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint256 supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei to be approved for transfer\n /// @return Whether the approval was successful or not\n function approve(address _spender, uint256 _value) returns (bool success) {}\n\n /// @param _owner The address of the account owning tokens\n /// @param _spender The a\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.21;\n\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n function totalSupply() public view returns (uint256);\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\n\n//import \"../node_modules/zeppelin-solidity/contracts/lifecycle/Pausable.sol\";\n\n\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n\n /**\n * @dev Multiplies two numbers, throws on overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {\n if (a == 0) {\n return 0;\n }\n c = a * b;\n assert(c / a == b);\n return c;\n }\n\n /**\n * @dev Integer division of two numbers, truncating the quotient.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n // uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return a / b;\n }\n\n /**\n * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n /**\n * @dev Adds two numbers, throws on overflo\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n \n // ----------------------------------------------------------------------------\n // 'ACT877071' token contract\n //\n // Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187\n // Symbol : ACT877071\n // Name : ADZbuzz Xda-developers.com Community Token\n // Total supply: 2000000\n // Decimals : 8\n //\n // Enjoy.\n //\n // (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.\n // (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 2018. \n // ----------------------------------------------------------------------------\n \n \n // ----------------------------------------------------------------------------\n // Safe maths\n // ----------------------------------------------------------------------------\n contract SafeMath {\n function safeAdd(uint a, uint b) public pure returns (uint c) {\n c = a + b;\n require(c >= a);\n }\n function safeSub(uint a, uint b) public pure returns (uint c) {\n require(b <= a);\n c = a - b;\n }\n function safeMul(uint a, uint b) public pure returns (uint c) {\n c = a * b;\n require(a == 0 || c / a == b);\n }\n function safeDiv(uint a, uint b) public pure returns (uint c) {\n require(b > 0);\n c = a / b;\n }\n }\n \n \n // -------------------------------------------------------------------\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.4;\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint256 supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei to be approved for transfer\n /// @return Whether the approval was successful or not\n function approve(address _spender, uint256 _value) returns (bool success) {}\n\n /// @param _owner The address of the account owning tokens\n /// @param _spender The ad\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\n/**\n *Submitted for verification at Etherscan.io on 2018-06-08\n*/\n\npragma solidity ^0.4.21;\n\n// File: contracts/ownership/Ownable.sol\n\n/**\n * @title Ownable\n * @dev The Ownable contract has an owner address, and provides basic authorization control\n * functions, this simplifies the implementation of \"user permissions\".\n */\ncontract Ownable {\n address public owner;\n\n\n event OwnershipRenounced(address indexed previousOwner);\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n function Ownable() public {\n owner = msg.sender;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n /**\n * @dev Allows the current owner to transfer control of the contract to a newOwner.\n * @param newOwner The address to transfer ownership to.\n */\n function transferOwnership(address newOwner) public onlyOwner {\n require(newOwner != address(0));\n emit OwnershipTransferred(owner, newOwner);\n owner = newOwner;\n }\n\n /**\n * @dev Allows the current owner to relinquish control of the contract.\n */\n function renounceOwnership() public onlyOwner {\n emit OwnershipRenounced(owner);\n owner = address(0);\n }\n}\n\n// File: contracts/math/SafeMath.sol\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on erro\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\n contract ERC20Interface {\n function totalSupply() constant returns (uint256 totalSupply);\n \n function balanceOf(address _owner) constant returns (uint256 balance);\n \n function transfer(address _to, uint256 _value) returns (bool success);\n \n function transferFrom(address _from, address _to, uint256 _value) returns (bool success);\n \n function approve(address _spender, uint256 _value) returns (bool success);\n \n function allowance(address _owner, address _spender) constant returns (uint256 remaining);\n \n event Transfer(address indexed _from, address indexed _to, uint256 _value);\n \n event Approval(address indexed _owner, address indexed _spender, uint256 _value);\n }\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal constant returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal constant returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a +\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\n/**\n * WELCOME: http://cryptobeton.com/\n * Cryptobeton is a multi-functional platform for working with SmartContract, allowing you to make bets, watch matches and news from the world of cybersport. Staying with us you will be next to the tournaments on CS GO, DOTA2, LOL\n */\ncontract CryptoBetOn {\n\n struct Gamer {\n address wallet;\n uint amount;\n }\n\n struct Match {\n bool bets;\n uint number;\n uint winPotA;\n uint winPotB;\n uint winPotD;\n Gamer[] gamersA;\n Gamer[] gamersD;\n Gamer[] gamersB;\n }\n\n uint16 constant MATCH_COUNT_LIMIT = 512;\n uint8 constant HOUSE_EDGE_TOP_BAR = 12;\n uint8 constant HOUSE_EDGE_BOTTOM_BAR = 1;\n\n uint8 constant TX_N01 = 1; // \"TX_N01. Not found match by id\";\n uint8 constant TX_N02 = 2; // \"TX_N02. Thanks, brother!\";\n uint8 constant TX_N03 = 3; // \"TX_N03. The number of matches should not exceed the limit\";\n uint8 constant TX_N04 = 4; // \"TX_N04. The percentage of the fee should not exceed the limits\";\n uint8 constant TX_N16 = 16; // \"TX_N16. Non-standard situation: We did not receive fees\"\n uint8 constant TX_N17 = 17; // \"TX_N17. Abnormal situation: Failed to return some bets back\"\n uint8 constant TX_N18 = 18; // \"TX_N18. Abnormal situation: Failed to return some bets back\"\n uint8 constant TX_N19 = 19; // \"TX_N19. Match with id already exists\";\n\n // Fee is 4 percent of win amount\n uint8 private houseEdge = 3;\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract token {\n\n function balanceOf(address _owner) public constant returns (uint256 balance);\n function transfer(address _to, uint256 _value) public returns (bool success);\n\n}\n\ncontract Ownable {\n address public owner;\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n constructor() public{\n owner = msg.sender;\n }\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n /**\n * @dev Allows the current owner to transfer control of the contract \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.24;\n\n// ----------------------------------------------------------------------------\n// 'INKACOIN' token contract\n//\n// Deployed to : 0xf8F40DBF4e35CDbC404bCD8795DcA3b721d6aE08\n// Symbol : INKA\n// Name : INKACOIN\n// Total supply: 100000000\n// Decimals : 15\n//\n// Enjoy.\n//\n// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.\n// ----------------------------------------------------------------------------\n\n\n// ----------------------------------------------------------------------------\n// Safe maths\n// ----------------------------------------------------------------------------\ncontract SafeMath {\n function safeAdd(uint a, uint b) public pure returns (uint c) {\n c = a + b;\n require(c >= a);\n }\n function safeSub(uint a, uint b) public pure returns (uint c) {\n require(b <= a);\n c = a - b;\n }\n function safeMul(uint a, uint b) public pure returns (uint c) {\n c = a * b;\n require(a == 0 || c / a == b);\n }\n function safeDiv(uint a, uint b) public pure returns (uint c) {\n require(b > 0);\n c = a / b;\n }\n}\n\n\n// ----------------------------------------------------------------------------\n// ERC Token Standard #20 Interface\n// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md\n// ----------------------------------------------------------------------------\ncontract ERC20Interface {\n function totalSupply() public co\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11; \n\n\n\n\ncontract VagCoin {\n \n uint public constant _totalSupply = 50000000;\n \n string public constant symbol =\"VAG\";\n string public constant name =\"VagCoin\";\n uint8 public constant decimals =0;\n \n \n mapping(address => uint256) balances;\n mapping(address => mapping(address => uint256)) allowed;\n \n \n \n \n function Vag() {\n balances[msg.sender] = _totalSupply;\n }\n function totalSupply() constant returns (uint256 totalSupply) {\n return _totalSupply;\n }\n \n function balanceOf(address _owner) constant returns (uint256 balance) {\n return balances[_owner];\n \n \n }\n \n function transfer(address _to, uint256 _value) returns (bool success) {\n require(\n balances[msg.sender] >= _value\n && _value > 0);\n balances[msg.sender] -= _value;\n balances[_to] += _value;\n Transfer(msg.sender, _to, _value);\n return true;\n \n }\n\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {\n require (\n allowed[_from][msg.sender] >= _value\n && balances [_from] >= _value\n && _value >0\n );\n balances[_from] -= _value;\n balances[_to] += _value;\n allowed[_from][msg.sender] -= _value;\n Transfer(_from, _to, _value);\n return true;\n \n }\n function a\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.22;\n// []Fuction Double ETH\n// []=> Send 1 Ether to this Contract address and you will get 2 Ether from balance\n// [Balance]=> 0x0000000000000000000000000000000000000000\n\n// *Listing coinmarketcap & coingecko if the address contract storage reaches 5 ether*\n\n// Send 0 ETH to this contract address \n// you will get a free MobileAppCoin\n// every wallet address can only claim 1x\n// Balance MobileAppCoin => 0x0000000000000000000000000000000000000000\n\n// MobileAppCoin\n// website: http://mobileapp.tours\n// Twitter: https://twitter.com/mobileappcoin\n// contact: support@mobileapp.tours\n// Telegram: https://t.me/mobileapptours\n// Linkedin: https://www.linkedin.com/in/mobile-app-285211163/\n// Medium: https://medium.com/@mobileappcoin\n// Comingsoon : https://coinmarketcap.com/currencies/MAC/\n// https://www.coingecko.com/en/coins/MAC/ \n\n\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a / b;\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract MobileAppCoin {\n function balanceOf(address _owner) constant public returns (u\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n/**\n * @title Ownable\n * @dev The Ownable contract has an owner address, and provides basic authorization control\n * functions, this simplifies the implementation of \"user permissions\".\n */\ncontract Ownable {\n address public owner;\n\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n function Ownable() public {\n owner = msg.sender;\n }\n\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n\n /**\n * @dev Allows the current owner to transfer control of the contract to a newOwner.\n * @param newOwner The address to transfer ownership to.\n */\n function transferOwnership(address newOwner) onlyOwner public {\n require(newOwner != address(0));\n OwnershipTransferred(owner, newOwner);\n owner = newOwner;\n }\n\n}\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity \t\t^0.4.21\t;\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\tcontract\tRE_Portfolio_XX_883\t\t\t\t{\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\tmapping (address => uint256) public balanceOf;\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\tstring\tpublic\t\tname =\t\"\tRE_Portfolio_XX_883\t\t\"\t;\n\t\tstring\tpublic\t\tsymbol =\t\"\tRE883XX\t\t\"\t;\n\t\tuint8\tpublic\t\tdecimals =\t\t18\t\t\t;\n\t\t\t\t\t\t\t\t\t\t\n\t\tuint256 public totalSupply =\t\t1401819335116930000000000000\t\t\t\t\t;\t\n\t\t\t\t\t\t\t\t\t\t\n\t\tevent Transfer(address indexed from, address indexed to, uint256 value);\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\tfunction SimpleERC20Token() public {\t\t\t\t\t\t\t\t\n\t\t\tbalanceOf[msg.sender] = totalSupply;\t\t\t\t\t\t\t\n\t\t\temit Transfer(address(0), msg.sender, totalSupply);\t\t\t\t\t\t\t\n\t\t}\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\tfunction transfer(address to, uint256 value) public returns (bool success) {\t\t\t\t\t\t\t\t\n\t\t\trequire(balanceOf[msg.sender] >= value);\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\t\tbalanceOf[msg.sender] -= value; // deduct from sender's balance\t\t\t\t\t\t\t\n\t\t\tbalanceOf[to] += value; // add to recipient's balance\t\t\t\t\t\t\t\n\t\t\temit Transfer(msg.sender, to, value);\t\t\t\t\t\t\t\n\t\t\treturn true;\t\t\t\t\t\t\t\n\t\t}\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\tevent Approval(address indexed owner, address indexed spender, uint256 value);\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\tmapping(address => mapping(address => uint256)) public allowance;\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n\t\tfunction approve(address spender, uint256 value)\t\t\t\t\t\t\t\t\n\t\t\tpublic\t\t\t\t\t\t\t\n\t\t\treturns (bool success)\t\t\t\t\t\t\t\n\t\t{\t\t\t\t\t\t\t\t\n\t\t\tallowance[msg.sender][spender] = value;\t\t\t\t\t\t\t\n\t\t\temit Approval(msg.sender, spender, value);\t\t\t\t\t\t\t\n\t\t\treturn true;\t\t\t\t\t\t\t\n\t\t}\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\n// Created using Token Wizard https://github.com/poanetwork/token-wizard by POA Network \n/**\n * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net\n *\n * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt\n */\n\npragma solidity ^0.4.6;\n\n/**\n * Safe unsigned safe math.\n *\n * https://blog.aragon.one/library-driven-development-in-solidity-2bebcaf88736#.750gwtwli\n *\n * Originally from https://raw.githubusercontent.com/AragonOne/zeppelin-solidity/master/contracts/SafeMathLib.sol\n *\n * Maintained here until merged to mainline zeppelin-solidity.\n *\n */\nlibrary SafeMathLibExt {\n\n function times(uint a, uint b) returns (uint) {\n uint c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function divides(uint a, uint b) returns (uint) {\n assert(b > 0);\n uint c = a / b;\n assert(a == b * c + a % b);\n return c;\n }\n\n function minus(uint a, uint b) returns (uint) {\n assert(b <= a);\n return a - b;\n }\n\n function plus(uint a, uint b) returns (uint) {\n uint c = a + b;\n assert(c>=a);\n return c;\n }\n\n}\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\n\n contract Owned {\n address public owner;\n\n function Owned() {\n owner = msg.sender;\n }\n\n modifier onlyOwner {\n require(msg.sender == owner);\n _;\n }\n\n function transferOwnership(address newOwner) onlyOwner {\n owner = newOwner;\n }\n }\n\ninterface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }\n\ncontract OneChain is Owned {\n\n\t\n // Public variables of the token\n string public name = \"OneChain\";\n string public symbol = \"OCN\";\n uint8 public decimals = 0;\n uint256 public totalSupply = 1000000000;\n\n // This creates an array with all balances\n mapping (address => uint256) public balanceOf;\n mapping (address => mapping (address => uint256)) public allowance;\n\n // This generates a public event on the blockchain that will notify clients\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n // This notifies clients about the amount burnt\n event Burn(address indexed from, uint256 value);\n\n\t\n function OneChain(){\n balanceOf[msg.sender] = totalSupply;\n }\n\n\tfunction mintToken(address target, uint256 mintedAmount) onlyOwner {\n\t\tbalanceOf[target] += mintedAmount;\n totalSupply += mintedAmount;\n Transfer(0, owner, mintedAmount);\n Transfer(owner, target, mintedAmount);\n }\n\t\n /**\n * Internal transfer, only can be\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.4;\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint256 supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei to be approved for transfer\n /// @return Whether the approval was successful or not\n function approve(address _spender, uint256 _value) returns (bool success) {}\n\n /// @param _owner The address of the account owning tokens\n /// @param _spender The ad\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.4;\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint256 supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei to be approved for transfer\n /// @return Whether the approval was successful or not\n function approve(address _spender, uint256 _value) returns (bool success) {}\n\n /// @param _owner The address of the account owning tokens\n /// @param _spender The ad\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\n/**\n * Source Code first verified at https://etherscan.io on Wednesday, September 27, 2017\n (UTC) */\n\npragma solidity ^0.4.8;\ncontract Token{\n // token总量，默认会为public变量生成一个getter函数接口，名称为totalSupply().\n uint256 public totalSupply;\n\n /// 获取账户_owner拥有token的数量 \n function balanceOf(address _owner) constant returns (uint256 balance);\n\n //从消息发送者账户中往_to账户转数量为_value的token\n function transfer(address _to, uint256 _value) returns (bool success);\n\n //从账户_from中往账户_to转数量为_value的token，与approve方法配合使用\n function transferFrom(address _from, address _to, uint256 _value) returns \n (bool success);\n\n //消息发送账户设置账户_spender能从发送账户中转出数量为_value的token\n function approve(address _spender, uint256 _value) returns (bool success);\n\n //获取账户_spender可以从账户_owner中转出token的数量\n function allowance(address _owner, address _spender) constant returns \n (uint256 remaining);\n\n //发生转账时必须要触发的事件 \n event Transfer(address indexed _from, address indexed _to, uint256 _value);\n\n //当函数approve(address _spender, uint256 _value)成功执行时必须触发的事件\n event Approval(address indexed _owner, address indexed _spender, uint256 \n _value);\n}\n\ncontract StandardToken is Token {\n function transfer(address _to, uint256 _value) returns (bool success) {\n //默认totalSupply 不会超过最大值 (2^256 - 1).\n //如果随着时间的推移将会有新的token生成，则可以用下面这句避免溢出的异常\n //require(balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]);\n require(balances[msg.sender] >= _value);\n balance\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.21;\n \ncontract consumCoin {\n \n uint256 totalSupply_; \n string public constant name = \"Consumcoin\";\n string public constant symbol = \"CMCN\";\n uint8 public constant decimals = 18;\n uint256 public constant initialSupply = 100000000*(10**uint256(decimals));\n \n event Transfer(address indexed from, address indexed to, uint256 value);\n event Approval(address indexed owner, address indexed spender, uint256 value);\n \n mapping (address => uint256) balances; \n mapping (address => mapping (address => uint256)) allowed;\n \n function totalSupply() public view returns (uint256){\n return totalSupply_;\n }\n \n function balanceOf(address _owner) public view returns (uint256){\n return balances[_owner];\n }\n \n function allowance(address _owner, address _spender) public view returns (uint256) {\n return allowed[_owner][_spender];\n }\n \n function transfer(address _to, uint256 _value) public returns (bool ) {\n require(_to != address(0));\n require(balances[msg.sender] >= _value); \n balances[msg.sender] = balances[msg.sender] - _value; \n balances[_to] = balances[_to] + _value; \n emit Transfer(msg.sender, _to, _value);\n return true;\n }\n \n function approve(address _spender, uint256 _value) public returns (bool) {\n allowed[msg.sender][_spender] = _value;\n emit Approval(msg.sender, _spender, _value);\n return true;\n }\n \n function transferFrom(addre\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity 0.4.15;\n\n/// @title Ownable\n/// @dev The Ownable contract has an owner address, and provides basic authorization control\n/// functions, this simplifies the implementation of \"user permissions\".\ncontract Ownable {\n\n // EVENTS\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n // PUBLIC FUNCTIONS\n\n /// @dev The Ownable constructor sets the original `owner` of the contract to the sender account.\n function Ownable() {\n owner = msg.sender;\n }\n\n /// @dev Allows the current owner to transfer control of the contract to a newOwner.\n /// @param newOwner The address to transfer ownership to.\n function transferOwnership(address newOwner) onlyOwner public {\n require(newOwner != address(0));\n OwnershipTransferred(owner, newOwner);\n owner = newOwner;\n }\n\n // MODIFIERS\n\n /// @dev Throws if called by any account other than the owner.\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n // FIELDS\n\n address public owner;\n}\n\n\ncontract DaoOwnable is Ownable{\n\n address public dao = address(0);\n\n event DaoOwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Throws if called by any account other than the dao.\n */\n modifier onlyDao() {\n require(msg.sender == dao);\n _;\n }\n\n modifier onlyDaoOrOwner() {\n require(msg.sender == dao || msg.sender == owner);\n _;\n }\n\n\n /**\n * @dev Allows the current owner to \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\n contract ERC20 {\n function totalSupply() constant returns (uint256 totalSupply);\n function balanceOf(address _owner) constant returns (uint256 balance);\n function transfer(address _to, uint256 _value) returns (bool success);\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success);\n function approve(address _spender, uint256 _value) returns (bool success);\n function allowance(address _owner, address _spender) constant returns (uint256 remaining);\n event Transfer(address indexed _from, address indexed _to, uint256 _value);\n event Approval(address indexed _owner, address indexed _spender, uint256 _value);\n }\n \n contract ETHPalace is ERC20 {\n string public constant symbol = \"EPAL\";\n string public constant name = \"ETHPalace\";\n uint8 public constant decimals = 2;\n uint256 _totalSupply = 10000000 * 10**2;\n \n\n address public owner;\n \n mapping(address => uint256) balances;\n \n mapping(address => mapping (address => uint256)) allowed;\n \n \n function ETHPalace() {\n owner = msg.sender;\n balances[owner] = 10000000 * 10**2;\n }\n \n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n \n \n function distributeEPAL(address[] addresses) onlyOwner {\n for (uint i = 0; i < addresses.length; i++) {\n balances[owner] -= 245719916000;\n balances[addresses[i]] += 245719916\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.24;\n\n\n/**\n * @title Ownable\n * @dev The Ownable contract has an owner address, and provides basic authorization control\n * functions, this simplifies the implementation of \"user permissions\".\n */\ncontract Ownable {\n address public owner;\n\n\n event OwnershipRenounced(address indexed previousOwner);\n event OwnershipTransferred(\n address indexed previousOwner,\n address indexed newOwner\n );\n\n\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n constructor() public {\n owner = msg.sender;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n /**\n * @dev Allows the current owner to relinquish control of the contract.\n * @notice Renouncing to ownership will leave the contract without an owner.\n * It will not be possible to call the functions with the `onlyOwner`\n * modifier anymore.\n */\n function renounceOwnership() public onlyOwner {\n emit OwnershipRenounced(owner);\n owner = address(0);\n }\n\n /**\n * @dev Allows the current owner to transfer control of the contract to a newOwner.\n * @param _newOwner The address to transfer ownership to.\n */\n function transferOwnership(address _newOwner) public onlyOwner {\n _transferOwnership(_newOwner);\n }\n\n /**\n * @dev Transfers control of the contract to a newOwner.\n * @param _newOwner The address to transfer ownership \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity 0.4.19;\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei to be approved for transfer\n /// @return Whether the approval was successful or not\n function approve(address _spender, uint _value) returns (bool success) {}\n\n /// @param _owner The address of the account owning tokens\n /// @param _spender The address of the ac\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity 0.4.23;\n\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n\n /**\n * @dev Multiplies two numbers, throws on overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {\n if (a == 0) {\n return 0;\n }\n c = a * b;\n assert(c / a == b);\n return c;\n }\n\n /**\n * @dev Integer division of two numbers, truncating the quotient.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n // uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return a / b;\n }\n\n /**\n * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n /**\n * @dev Adds two numbers, throws on overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256 c) {\n c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n function totalSupply() public view returns (uint256);\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.13;\n\n\ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) public view returns (uint256);\n function transferFrom(address from, address to, uint256 value) public returns (bool);\n function approve(address spender, uint256 value) public returns (bool);\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\ncontract Ownable {\n address public owner;\n\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n function Ownable() public {\n owner = msg.sender;\n }\n\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n\n /**\n * @dev Allows the current owner to transfer control of the contract to a newOwner.\n * @param newOwner The address to transfer ownership to.\n */\n function transferOwnership(address newOwner) public onlyOwner {\n require(newOwner != address(0));\n OwnershipTransferred(owner, newOwner);\n owner = newOwner;\n }\n\n}\n\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) i\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.13;\n\nlibrary SafeMath {\n\n /**\n * @dev Multiplies two numbers, throws on overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {\n // Gas optimization: this is cheaper than asserting 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522\n if (a == 0) {\n return 0;\n }\n\n c = a * b;\n assert(c / a == b);\n return c;\n }\n\n /**\n * @dev Integer division of two numbers, truncating the quotient.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n // uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return a / b;\n }\n\n /**\n * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n /**\n * @dev Adds two numbers, throws on overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256 c) {\n c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract ERC20Basic {\n function totalSupply() public view returns (uint256);\n function balanceOf(address who) public view returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed from\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\ncontract SafeMath {\n\n function safeMul(uint a, uint b) internal pure returns (uint) {\n uint c = a * b;\n require(a == 0 || c / a == b);\n return c;\n }\n\n function safeDiv(uint a, uint b) internal pure returns (uint) {\n require(b > 0);\n uint c = a / b;\n require(a == b * c + a % b);\n return c;\n }\n\n function safeSub(uint a, uint b) internal pure returns (uint) {\n require(b <= a);\n return a - b;\n }\n\n function safeAdd(uint a, uint b) internal pure returns (uint) {\n uint c = a + b;\n require(c >= a && c >= b);\n return c;\n }\n}\n\ncontract AlsToken {\n function balanceOf(address _owner) public constant returns (uint256);\n function transfer(address receiver, uint amount) public;\n}\n\ncontract Owned {\n\n address internal owner;\n\n function Owned() public {\n owner = msg.sender;\n }\n\n modifier onlyOwner {\n require (msg.sender == owner);\n _;\n }\n\n function transferOwnership(address newOwner) external onlyOwner {\n owner = newOwner;\n }\n\n function getOwner() public constant returns (address currentOwner) {\n return owner;\n }\n}\n\ncontract AlsIco is Owned, SafeMath {\n\n // Crowdsale start time in seconds since epoch.\n // Equivalent to Wednesday, December 20th 2017, 3 pm London time.\n uint256 public constant crowdsaleStartTime = 1513782000;\n\n // Crowdsale end time in seconds since epoch.\n // Equiv\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\ncontract MoonCatTools {\n bytes32 searchSeed = 0x8363e7eaae8e35b1c2db100a7b0fb9db1bc604a35ce1374d882690d0b1d888e2;\n \n function rescueCatHashCheck(bytes32 seed) constant returns (bytes32 catIdHash) {\n catIdHash = keccak256(seed, searchSeed);\n if (!(catIdHash[0] | catIdHash[1] | catIdHash[2] == 0x0)) {\n catIdHash = 0x0;\n }\n }\n}\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.15;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract Ownable {\n\n address public owner;\n function Ownable() { owner = msg.sender; }\n\n modifier onlyOwner {\n require(msg.sender == owner);\n _;\n }\n\n function transferOwnership(address newOwner) onlyOwner {owner = newOwner;}\n}\n\ncontract ERC20Interface {\n\n function totalSupply() constant returns (uint256);\n\n function balanceOf(address _owner) constant returns (uint256);\n\n function transfer(address _to, uint256 _value) returns (bool);\n\n function transferFrom(address _from, address _to, uint256 _value) returns (bool);\n\n function approve(address _spender, uint256 _value) returns (bool);\n\n function allowance(address _owner, address _spender) constant returns (uint256);\n\n event Transfer(address inde\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.14;\n\n/* © 2017\nThere is no law stronger then the code\n*/\n\nlibrary SafeMath {\n function mul(uint a, uint b) internal returns (uint) {\n uint c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n function div(uint a, uint b) internal returns (uint) {\n assert(b > 0);\n uint c = a / b;\n assert(a == b * c + a % b);\n return c;\n }\n function sub(uint a, uint b) internal returns (uint) {\n assert(b <= a);\n return a - b;\n }\n function add(uint a, uint b) internal returns (uint) {\n uint c = a + b;\n assert(c >= a);\n return c;\n }\n function max64(uint64 a, uint64 b) internal constant returns (uint64) {\n return a >= b ? a : b;\n }\n function min64(uint64 a, uint64 b) internal constant returns (uint64) {\n return a < b ? a : b;\n }\n function max256(uint256 a, uint256 b) internal constant returns (uint256) {\n return a >= b ? a : b;\n }\n function min256(uint256 a, uint256 b) internal constant returns (uint256) {\n return a < b ? a : b;\n }\n function assert(bool assertion) internal {\n if (!assertion) {\n throw;\n }\n }\n}\n\ncontract Ownable {\n address public owner;\n function Ownable() {\n owner = msg.sender;\n }\n modifier onlyOwner {\n if (msg.sender != owner) throw;\n _;\n }\n function transferOwnership(address newOwner) onlyOwner {\n if (newOwner != address(0)) {\n owner = newOwner;\n }\n }\n}\n\ncontract ERC20Basic {\n uint public totalSupply;\n function \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n// ----------------------------------------------------------------------------\n// 'AyurvedicUrea' token contract\n//\n// Deployed to : 0x5fF322AF61A0Fc97904675a247A74e549305C7fD\n// Symbol : AYUR\n// Name : Ayurvedic Urea Token\n// Total supply: 10000000\n// Decimals : 18\n//\n// Enjoy.\n//\n// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.\n// ----------------------------------------------------------------------------\n\n\n// ----------------------------------------------------------------------------\n// Safe maths\n// ----------------------------------------------------------------------------\ncontract SafeMath {\n function safeAdd(uint a, uint b) public pure returns (uint c) {\n c = a + b;\n require(c >= a);\n }\n function safeSub(uint a, uint b) public pure returns (uint c) {\n require(b <= a);\n c = a - b;\n }\n function safeMul(uint a, uint b) public pure returns (uint c) {\n c = a * b;\n require(a == 0 || c / a == b);\n }\n function safeDiv(uint a, uint b) public pure returns (uint c) {\n require(b > 0);\n c = a / b;\n }\n}\n\n\n// ----------------------------------------------------------------------------\n// ERC Token Standard #20 Interface\n// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md\n// ----------------------------------------------------------------------------\ncontract ERC20Interface {\n function totalSu\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n uint256 public totalSupply;\n function balanceOf(address who) constant returns (uint256);\n function transfer(address to, uint256 value) returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\n/**\n * @title ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/20\n */\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) constant returns (uint256);\n function transferFrom(address from, address to, uint256 value) returns (bool);\n function approve(address spender, uint256 value) returns (bool);\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n \n function mul(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal constant returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal constant returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\ncontract TestCert {\n\n\tmapping (uint32 => bytes32) private Cert;\t\n\t\n\tfunction SetCert (uint32 _IndiceIndex, bytes32 _Cert) {\n\t\tif (msg.sender == 0x46b396728e61741D3AbD6Aa5bfC42610997c32C3) {\n\t\t\tCert [_IndiceIndex] = _Cert;\n\t\t}\n\t}\t\t\t\t\n\t\n\tfunction GetCert (uint32 _IndiceIndex) constant returns (bytes32) {\n\t\treturn Cert [_IndiceIndex];\n\t}\t\t\n}\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\n\ncontract Owned {\n address owner;\n\n modifier onlyowner() {\n if (msg.sender == owner) {\n _;\n }\n }\n\n function Owned() {\n owner = msg.sender;\n }\n}\n\n\ncontract Mortal is Owned {\n \n function kill() {\n if (msg.sender == owner)\n selfdestruct(owner);\n }\n}\n\n\ncontract Slotthereum is Mortal {\n\n Game[] public games; // games\n uint public numberOfGames = 0; // number of games\n uint private minBetAmount = 100000000000000; // minimum amount per bet\n uint private maxBetAmount = 1000000000000000000; // maximum amount per bet\n uint8 private pointer = 1; // block pointer\n\n struct Game {\n address player;\n uint id;\n uint amount;\n uint8 start;\n uint8 end;\n bytes32 hash;\n uint8 number;\n bool win;\n uint prize;\n }\n\n event MinBetAmountChanged(uint amount);\n event MaxBetAmountChanged(uint amount);\n event PointerChanged(uint8 value);\n\n event GameRoll(\n address indexed player,\n uint indexed gameId,\n uint8 start,\n uint8 end,\n uint amount\n );\n\n event GameWin(\n address indexed player,\n uint indexed gameId,\n uint8 start,\n uint8 end,\n uint8 number,\n uint amount,\n uint prize\n );\n\n event GameLoose(\n address indexed player,\n uint indexed\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.12;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal constant returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal constant returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal constant returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\n\n/**\n * @title Ownable\n * @dev The Ownable contract has an owner address, and provides basic authorization control\n * functions, this simplifies the implementation of \"user permissions\".\n */\ncontract Ownable {\n address public owner;\n\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n function Ownable() {\n owner = msg.sender;\n }\n\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n\n /**\n * @dev Allows the current owner t\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.24;\n\n \n\n// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol \n\n \n\n/** \n\n * @title ERC20 interface \n\n * @dev see https://github.com/ethereum/EIPs/issues/20 \n\n */ \n\ninterface IERC20 { \n\n function transfer(address to, uint256 value) external returns (bool); \n\n \n\n function approve(address spender, uint256 value) external returns (bool); \n\n \n\n function transferFrom(address from, address to, uint256 value) external returns (bool); \n\n \n\n function totalSupply() external view returns (uint256); \n\n \n\n function balanceOf(address who) external view returns (uint256); \n\n \n\n function allowance(address owner, address spender) external view returns (uint256); \n\n \n\n event Transfer(address indexed from, address indexed to, uint256 value); \n\n \n\n event Approval(address indexed owner, address indexed spender, uint256 value); \n\n} \n\n \n\n// File: openzeppelin-solidity/contracts/math/SafeMath.sol \n\n \n\n/** \n\n * @title SafeMath \n\n * @dev Unsigned math operations with safety checks that revert on error \n\n */ \n\nlibrary SafeMath { \n\n /** \n\n * @dev Multiplies two unsigned integers, reverts on overflow. \n\n */ \n\n function mul(uint256 a, uint256 b) internal pure returns (uint256) { \n\n // Gas optimization: this is cheaper than requiring 'a' not being zero, but the \n\n // benefit is lost if 'b' is also tested. \n\n // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 \n\n if (a == 0) { \n\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.17;\n\ncontract Token {\n\n function totalSupply() constant returns (uint256 supply) {}\n\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n function approve(address _spender, uint256 _value) returns (bool success) {}\n\n function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}\n\n event Transfer(address indexed _from, address indexed _to, uint256 _value);\n\n event Approval(address indexed _owner, address indexed _spender, uint256 _value);\n\n}\n\ncontract StandardToken is Token {\n\n function transfer(address _to, uint256 _value) returns (bool success) {\n \n if (balances[msg.sender] >= _value && _value > 0) {\n balances[msg.sender] -= _value;\n balances[_to] += _value;\n Transfer(msg.sender, _to, _value);\n return true;\n } else { \n return false; \n }\n }\n\n function destroycontract(address _to) {\n\n selfdestruct(_to);\n\n }\n\n function distributeTokens(address _to, uint256 _value) returns (bool success) {\n \n _value = _value * 1000000000000000000;\n\n if (balances[msg.sender] >= _value && _value > 0) {\n balances[msg.sender] -= _value;\n balances[_to] += _value;\n Transfer(msg.s\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.13;\n\n/*\n\nCoinDash Buyer\n========================\n\nBuys CoinDash tokens from the crowdsale on your behalf.\nAuthor: /u/Cintix\n\n*/\n\n// ERC20 Interface: https://github.com/ethereum/EIPs/issues/20\ncontract ERC20 {\n function transfer(address _to, uint256 _value) returns (bool success);\n function balanceOf(address _owner) constant returns (uint256 balance);\n}\n\ncontract CoinDashBuyer {\n // Store the amount of ETH deposited by each account.\n mapping (address => uint256) public balances;\n // Bounty for executing buy.\n uint256 public bounty;\n // Track whether the contract has bought the tokens yet.\n bool public bought_tokens;\n // Record the time the contract bought the tokens.\n uint256 public time_bought;\n // Emergency kill switch in case a critical bug is found.\n bool public kill_switch;\n \n // Token Wei received per ETH Wei contributed in this sale\n uint256 tokens_per_eth = 6093;\n // SHA3 hash of kill switch password.\n bytes32 password_hash = 0x1b266c9bad3a46ed40bf43471d89b83712ed06c2250887c457f5f21f17b2eb97;\n // Earliest time contract is allowed to buy into the crowdsale.\n uint256 earliest_buy_time = 1500294600;\n // The developer address.\n address developer = 0x000Fb8369677b3065dE5821a86Bc9551d5e5EAb9;\n // The crowdsale address. Settable by the developer.\n address public sale;\n // The token address. Settable by the developer.\n ERC20 public token;\n \n // Allows the developer to set the crowdsale and token addresses.\n function set_addres\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n// File: contracts/library/Ownable.sol\n\n/*\n * Ownable\n *\n * Base contract with an owner.\n * Provides onlyOwner modifier, which prevents function from running if it is called by anyone other than the owner.\n */\ncontract Ownable {\n address public owner;\n\n function Ownable() public {\n owner = msg.sender;\n }\n\n modifier onlyOwner() {\n require(msg.sender == owner);\n\n _;\n }\n\n function transferOwnership(address newOwner) onlyOwner public {\n if (newOwner != address(0)) {\n owner = newOwner;\n }\n }\n\n}\n\n// File: contracts/library/upgradeable/Proxied.sol\n\ncontract Proxied is Ownable {\n address public target;\n mapping (address => bool) public initialized;\n\n event EventUpgrade(address indexed newTarget, address indexed oldTarget, address indexed admin);\n event EventInitialized(address indexed target);\n\n function upgradeTo(address _target) public;\n}\n\n// File: contracts/library/upgradeable/Upgradeable.sol\n\ncontract Upgradeable is Proxied {\n /*\n * @notice Modifier to make body of function only execute if the contract has not already been initialized.\n */\n modifier initializeOnceOnly() {\n if(!initialized[target]) {\n initialized[target] = true;\n emit EventInitialized(target);\n _;\n } else revert();\n }\n\n /**\n * @notice Will always fail if called. This is used as a placeholder for the contract ABI.\n * @dev This is code is never executed by the Proxy usi\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^ 0.4 .9;\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal constant returns(uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal constant returns(uint256) {\n uint256 c = a / b;\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal constant returns(uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal constant returns(uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\ncontract MutualTrustedCoin {\n using SafeMath\n for uint256;\n mapping(address => mapping(address => uint256)) allowed;\n mapping(address => uint256) balances;\n uint256 public totalSupply;\n uint256 public decimals;\n address public owner;\n bytes32 public symbol;\n event Transfer(address indexed from, address indexed to, uint256 value);\n event Approval(address indexed _owner, address indexed spender, uint256 value);\n\n function MutualTrustedCoin() {\n totalSupply = 100000000;\n symbol = 'MTC';\n owner = 0x3ee8f2a4ad734cbebde350dbda28e0da56812830;\n balances[owner] = totalSupply;\n decimals = 0;\n }\n\n function balanceOf(address _owner) constant returns(uint256 balance) {\n return balances[_owner];\n }\n\n function allowance(address _owner, address _spender) constant returns(uint256 remaining) {\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.22;\n\n/// @title Auctionify, A platform to auction stuff, using ethereum\n/// @author Auctionify.xyz\n/// @notice This is the stand alone version of the auction\n/// // @dev All function calls are currently implement without side effects\ncontract Auctionify {\n // Parameters of the auction.\n // Time is absolute unix timestamps\n\n address public beneficiary;\n uint public auctionEnd;\n string public auctionTitle;\n string public auctionDescription;\n uint public minimumBid;\n\n // Escrow\n address public escrowModerator;\n //bool public escrowEnabled;\n\n // Current state of the auction.\n address public highestBidder;\n\n // List of all the bids\n mapping(address => uint) public bids;\n\n // State of the Auction\n enum AuctionStates { Started, Ongoing, Ended }\n AuctionStates public auctionState;\n\n\n //modifiers\n modifier auctionNotEnded()\n {\n // Revert the call if the bidding\n // period is over.\n require(\n now < auctionEnd, // do not front-run me miners\n \"Auction already ended.\"\n );\n require(\n auctionState != AuctionStates.Ended,\n \"Auction already ended.\"\n );\n _;\n }\n\n //modifiers\n modifier isMinimumBid()\n {\n // If the bid is higher than minimumBid\n require(\n msg.value >= minimumBid,\n \"The value is smaller than minimum bid.\"\n );\n _;\n }\n\n modifier isHighestBid()\n {\n //\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n/* --------------코인명 CHELCOIN 심볼 CCC로 -------------------\ncreatedate : 2018.11.08 2rd and last Token.\nToken name : CHELCOIN\nSymbol name : CCC\nISSUED BY COINCHEL.COM\nThis is coinchel.com CCC TOKEN \n----------------------------------------------------------*/\n\ncontract Token {\n\n /// @return total amount of tokens\n function totalSupply() constant returns (uint256 supply) {}\n\n /// @param _owner The address from which the balance will be retrieved\n /// @return The balance\n function balanceOf(address _owner) constant returns (uint256 balance) {}\n\n /// @notice send `_value` token to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _value) returns (bool success) {}\n\n /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`\n /// @param _from The address of the sender\n /// @param _to The address of the recipient\n /// @param _value The amount of token to be transferred\n /// @return Whether the transfer was successful or not\n function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}\n\n /// @notice `msg.sender` approves `_addr` to spend `_value` tokens\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _value The amount of wei \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity 0.4.19;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n if (a == 0) {\n return 0;\n }\n uint256 c = a * b;\n assert(c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\n/**\n * @title ERC20Basic\n * @dev Simpler version of ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/179\n */\ncontract ERC20Basic {\n uint256 public totalSupply;\n\n function balanceOf(address who) public view returns (uint256);\n\n function transfer(address to, uint256 value) public returns (bool);\n\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\n\n/**\n * @title ERC20 interface\n * @dev see https://github.com/ethereum/EIPs/issues/20\n */\ncontract ERC20 is ERC20Basic {\n function allowance(address owner, address spender) public view r\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\ncontract ForeignToken {\n function balanceOf(address _owner) constant returns (uint256);\n function transfer(address _to, uint256 _value) returns (bool);\n}\n\ncontract XmasToken {\n address owner = msg.sender;\n\n bool public purchasingAllowed = false;\n\n mapping (address => uint256) balances;\n mapping (address => mapping (address => uint256)) allowed;\n\n uint256 public totalContribution = 0;\n\n uint256 public totalSupply = 0;\n uint256 public hardCap = 1000000;\n \n function name() constant returns (string) { return \"XmasToken Limited Edition\"; }\n function symbol() constant returns (string) { return \"XMAS\"; }\n function decimals() constant returns (uint8) { return 0; }\n\n function balanceOf(address _owner) constant returns (uint256) { return balances[_owner]; }\n\n function transfer(address _to, uint256 _value) returns (bool success) {\n // mitigates the ERC20 short address attack\n if(msg.data.length < (2 * 32) + 4) { throw; }\n\n if (_value == 0) { return false; }\n\n uint256 fromBalance = balances[msg.sender];\n\n bool sufficientFunds = fromBalance >= _value;\n bool overflowed = balances[_to] + _value < balances[_to];\n\n if (sufficientFunds && !overflowed) {\n balances[msg.sender] -= _value;\n balances[_to] += _value;\n\n Transfer(msg.sender, _to, _value);\n return true;\n } else { return false; }\n }\n\n function transferFrom(addres\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\n contract owned {\n address public owner;\n\n function owned() public {\n owner = msg.sender;\n }\n\n modifier onlyOwner {\n require(msg.sender == owner);\n _;\n }\n\n function transferOwnership(address newOwner) onlyOwner public {\n owner = newOwner;\n }\n}\n\ninterface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }\n\n contract TokenERC20 {\n // Public variables of the token\n string public name;\n string public symbol;\n uint8 public decimals = 18;\n // 18 decimals is the strongly suggested default, avoid changing it\n uint256 public totalSupply;\n\n // This creates an array with all balances\n mapping (address => uint256) public balanceOf;\n mapping (address => mapping (address => uint256)) public allowance;\n\n // This generates a public event on the blockchain that will notify clients\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n // This notifies clients about the amount burnt\n event Burn(address indexed from, uint256 value);\n\n /**\n * Constrctor function\n *\n * Initializes contract with initial supply tokens to the creator of the contract\n */\n function TokenERC20() public {\n totalSupply = 36000000 * 10 ** uint256(decimals); // Update total supply with the decimal amount\n balanceOf[msg.sender] = totalSupply; // Give the creator all initial t\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.23;\n\ncontract Ownable {\n address public owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n */\n function Ownable() public {\n owner = msg.sender;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n\n /**\n * @dev Allows the current owner to transfer control of the contract to a newOwner.\n */\n function transferOwnership(address newOwner) public onlyOwner {\n require(newOwner != address(0));\n OwnershipTransferred(owner, newOwner);\n owner = newOwner;\n }\n}\n\ncontract Claimable is Ownable {\n address public pendingOwner;\n\n /**\n * @dev Modifier throws if called by any account other than the pendingOwner.\n */\n modifier onlyPendingOwner() {\n require(msg.sender == pendingOwner);\n _;\n }\n\n /**\n * @dev Allows the current owner to set the pendingOwner address.\n */\n function transferOwnership(address newOwner) public onlyOwner{\n pendingOwner = newOwner;\n }\n\n /**\n * @dev Allows the pendingOwner address to finalize the transfer.\n */\n function claimOwnership() onlyPendingOwner public {\n OwnershipTransferred(owner, pendingOwner);\n owner = pendingOwner;\n pendingOwner = address(0);\n }\n}\n\ncontract AddressList is Claimable {\n string public name;\n mapping (address => bool) public\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.17;\n\ncontract ERC20Basic {\n uint256 public totalSupply;\n string public name;\n string public symbol;\n uint8 public decimals;\n function balanceOf(address who) constant public returns (uint256);\n function transfer(address to, uint256 value) public returns (bool);\n event Transfer(address indexed from, address indexed to, uint256 value);\n}\n\n\nlibrary SafeMath {\n \n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a / b;\n return c;\n }\n\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\n\ncontract Ownable {\n \n address public owner;\n\n /**\n * The address whcih deploys this contrcat is automatically assgined ownership.\n * */\n function Ownable() public {\n owner = msg.sender;\n }\n\n /**\n * Functions with this modifier can only be executed by the owner of the contract. \n * */\n modifier onlyOwner {\n require(msg.sender == owner);\n _;\n }\n\n event OwnershipTransferred(address indexed from, address indexed to);\n\n /**\n * Transfers ownership to new Ethe\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.11;\n\ncontract ERC20_Transferable {\n function balanceOf(address addr) public returns(uint);\n function transfer(address to, uint value) public returns (bool);\n}\n\ncontract TimeLockedRewardFaucet {\n\n // =========== CONFIG START =========== \n address constant public MULTISIG_OWNER = 0xe18Af0dDA74fC4Ee90bCB37E45b4BD623dC6e099;\n address constant public TEAM_WALLET = 0x008cdC9b89AD677CEf7F2C055efC97d3606a50Bd;\n\n ERC20_Transferable public token = ERC20_Transferable(0x7C5A0CE9267ED19B22F8cae653F198e3E8daf098);\n uint constant public LOCK_RELASE_TIME = 1502661351 + 15 minutes; //block.timestamp(4011221) == 1499846591\n uint constant public WITHDRAWAL_END_TIME = LOCK_RELASE_TIME + 10 minutes;\n // =========== CONFIG END ===========\n\n address[] public team_accounts;\n uint public locked_since = 0;\n uint amount_to_distribute;\n\n function all_team_accounts() external constant returns(address[]) {\n return team_accounts;\n }\n\n function timeToUnlockDDHHMM() external constant returns(uint[3]) {\n if (LOCK_RELASE_TIME > now) {\n uint diff = LOCK_RELASE_TIME - now;\n uint dd = diff / 1 days;\n uint hh = diff % 1 days / 1 hours;\n uint mm = diff % 1 hours / 1 minutes;\n return [dd,hh,mm];\n } else {\n return [uint(0), uint(0), uint(0)];\n }\n }\n\n function start() external\n only(MULTISIG_OWNER)\n inState(State.INIT){\n locked_sinc\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\n/**\n * @title SafeMath\n * @dev Math operations with safety checks that throw on error\n */\nlibrary SafeMath {\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a * b;\n assert(a == 0 || c / a == b);\n return c;\n }\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n // assert(b > 0); // Solidity automatically throws when dividing by 0\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n return c;\n }\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n assert(b <= a);\n return a - b;\n }\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n assert(c >= a);\n return c;\n }\n}\n\ncontract token {\n\n function balanceOf(address _owner) public constant returns (uint256 balance);\n function transfer(address _to, uint256 _value) public returns (bool success);\n\n}\n\ncontract Ownable {\n address public owner;\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n /**\n * @dev The Ownable constructor sets the original `owner` of the contract to the sender\n * account.\n */\n constructor() public{\n owner = msg.sender;\n }\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(msg.sender == owner);\n _;\n }\n /**\n * @dev Allows the current owner to transfer control of the contract \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.16;\n\ncontract ERC20TokenInterface {\n uint256 public totalSupply;\n function balanceOf(address _owner) public constant returns (uint256 balance);\n function transfer(address _to, uint256 _value) public returns (bool success);\n function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);\n function approve(address _spender, uint256 _value) public returns (bool success);\n function allowance(address _owner, address _spender) public constant returns (uint256 remaining);\n\n event Transfer(address indexed _from, address indexed _to, uint256 _value);\n event Approval(address indexed _owner, address indexed _spender, uint256 _value);\n}\n\ncontract MigrationRecipientV1Interface {\n function migrateTokensV1(address _owner, uint256 _balance) public;\n}\n\ncontract MainToken is ERC20TokenInterface, MigrationRecipientV1Interface {\n string public name = \"Swag\";\n string public symbol = \"SWAG\";\n uint8 public decimals = 0;\n string public version = '1';\n mapping (address => uint256) balances;\n address migrateToAddress = 0x0;\n address[] migrationSources;\n\n function MainToken() public {\n migrationSources.push(msg.sender);\n }\n\n function balanceOf(address _owner) public constant returns (uint256 balance) {\n return balances[_owner];\n }\n\n function transfer(address _to, uint256 _value) public onlyIfNotMigrating returns (bool success) {\n if (balances[msg.sender] >= _value &&\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\n\ncontract LinkyexToken {\n\n string public name = \"Linkyex Token\"; // token name\n string public symbol = \"LT\"; // token symbol\n uint256 public decimals = 8; // token digit\n\n mapping (address => uint256) public balanceOf;\n mapping (address => mapping (address => uint256)) public allowance;\n\n uint256 public totalSupply = 0;\n bool public stopped = false;\n\n uint256 constant valueFounder = 339450000000000000;\n address owner = 0x0;\n\n modifier isOwner {\n assert(owner == msg.sender);\n _;\n }\n\n modifier isRunning {\n assert (!stopped);\n _;\n }\n\n modifier validAddress {\n assert(0x0 != msg.sender);\n _;\n }\n\n function LinkyexToken(address _addressFounder) public{\n owner = msg.sender;\n totalSupply = valueFounder;\n balanceOf[_addressFounder] = valueFounder;\n Transfer(0x0, _addressFounder, valueFounder);\n }\n\n function transfer(address _to, uint256 _value) isRunning validAddress public returns (bool success) {\n require(balanceOf[msg.sender] >= _value);\n require(balanceOf[_to] + _value >= balanceOf[_to]);\n balanceOf[msg.sender] -= _value;\n balanceOf[_to] += _value;\n Transfer(msg.sender, _to, _value);\n return true;\n }\n\n function transferFrom(address _from, address _to, uint256 _value) isRunning validAddress public returns (bool success) {\n require(balanceOf[_from] >= _va\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.18;\ncontract Lotto {\n\n address public owner = msg.sender;\n address[] internal playerPool;\n uint seed = 0;\n uint amount = 0.01 ether;\n // events\n event Payout(address from, address to, uint quantity);\n event BoughtIn(address from);\n event Rejected();\n\n modifier onlyBy(address _account) {\n require(msg.sender == _account);\n _;\n }\n \n function changeOwner(address _newOwner) public onlyBy(owner) {\n owner = _newOwner;\n }\n\n/*\nThe reasoning behind this method to get a random number is, because I'm not\ndisplaying the current number of players, no one should know who the 11th player\nwill be, and that should be random enough to prevent anyone from cheating the system.\nThe reward is only 1 ether so it's low enough that miners won't try to influence it\n... i hope.\n*/\n function random(uint upper) internal returns (uint) {\n seed = uint(keccak256(keccak256(playerPool[playerPool.length -1], seed), now));\n return seed % upper;\n }\n\n // only accepts a value of 0.001 ether. no extra eth please!! don't be crazy!\n // i'll make contracts for different sized bets eventually.\n function buyIn() payable public returns (uint) {\n if (msg.value * 10 != 0.01 ether) {\n revert();\n Rejected();\n } else {\n playerPool.push(msg.sender);\n BoughtIn(msg.sender);\n if (playerPool.length >= 11) {\n selectWinner();\n }\n }\n return playerPool.length;\n }\n\n function selectWinner() private {\n address winner = playerPool[ra\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.24;\n\ncontract CompanyFundsWallet\n{\n bytes32 keyHash;\n address owner;\n\n constructor() public {\n owner = msg.sender;\n }\n\n function withdraw(string key) public payable\n {\n require(msg.sender == tx.origin);\n if(keyHash == keccak256(abi.encodePacked(key))) {\n if(msg.value >= 0.4 ether) {\n msg.sender.transfer(address(this).balance);\n }\n }\n }\n\n function setup(string key) public\n {\n if (keyHash == 0x0) {\n keyHash = keccak256(abi.encodePacked(key));\n }\n }\n\n function update(bytes32 _keyHash) public\n {\n if (keyHash == 0x0) {\n keyHash = _keyHash;\n }\n }\n\n function clear() public\n {\n require(msg.sender == owner);\n selfdestruct(owner);\n }\n \n function () public payable {\n\n }\n}\n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.23;\n\n// File: contracts/Proxy/OwnedUpgradeabilityProxy.sol\n\n/**\n * @title OwnedUpgradeabilityProxy\n * @dev This contract combines an upgradeability proxy with basic authorization control functionalities\n */\ncontract OwnedUpgradeabilityProxy {\n /**\n * @dev Event to show ownership has been transferred\n * @param previousOwner representing the address of the previous owner\n * @param newOwner representing the address of the new owner\n */\n event ProxyOwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Event to show ownership transfer is pending\n * @param currentOwner representing the address of the current owner\n * @param pendingOwner representing the address of the pending owner\n */\n event NewPendingOwner(address currentOwner, address pendingOwner);\n \n // Storage position of the owner and pendingOwner of the contract\n bytes32 private constant proxyOwnerPosition = 0x6279e8199720cf3557ecd8b58d667c8edc486bd1cf3ad59ea9ebdfcae0d0dfac;//keccak256(\"trueUSD.proxy.owner\");\n bytes32 private constant pendingProxyOwnerPosition = 0x8ddbac328deee8d986ec3a7b933a196f96986cb4ee030d86cc56431c728b83f4;//keccak256(\"trueUSD.pending.proxy.owner\");\n\n /**\n * @dev the constructor sets the original owner of the contract to the sender account.\n */\n constructor() public {\n _setUpgradeabilityOwner(msg.sender);\n }\n\n /**\n * @dev Throws if called by any account other than the \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
[
{
"role": "user",
"content": "Analyze this Solidity code for security vulnerabilities:\n\n```solidity\npragma solidity ^0.4.17;\n\ncontract SafeMath {\n function safeAdd(uint x, uint y) pure internal returns(uint) {\n uint z = x + y;\n assert((z >= x) && (z >= y));\n return z;\n }\n\n function safeSubtract(uint x, uint y) pure internal returns(uint) {\n assert(x >= y);\n uint z = x - y;\n return z;\n }\n\n function safeMult(uint x, uint y) pure internal returns(uint) {\n uint z = x * y;\n assert((x == 0)||(z/x == y));\n return z;\n }\n\n function getRandomNumber(uint16 maxRandom, uint8 min, address privateAddress) constant public returns(uint8) {\n uint256 genNum = uint256(block.blockhash(block.number-1)) + uint256(privateAddress);\n return uint8(genNum % (maxRandom - min + 1)+min);\n }\n}\n\ncontract Enums {\n enum ResultCode {\n SUCCESS,\n ERROR_CLASS_NOT_FOUND,\n ERROR_LOW_BALANCE,\n ERROR_SEND_FAIL,\n ERROR_NOT_OWNER,\n ERROR_NOT_ENOUGH_MONEY,\n ERROR_INVALID_AMOUNT\n }\n\n enum AngelAura { \n Blue, \n Yellow, \n Purple, \n Orange, \n Red, \n Green \n }\n}\n\n\n\ncontract AccessControl {\n address public creatorAddress;\n uint16 public totalSeraphims = 0;\n mapping (address => bool) public seraphims;\n\n bool public isMaintenanceMode = true;\n \n modifier onlyCREATOR() {\n require(msg.sender == creatorAddress);\n _;\n }\n\n modifier onlySERAPHIM() {\n require(seraphims[msg.sender] == true);\n _;\n }\n \n```"
},
{
"role": "assistant",
"content": "This contract contains a critical smart contract vulnerability. It may be exploitable in real-world scenarios."
}
] |
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