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Latest 25 from a total of 764 transactions
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Get Reward | 14977181 | 924 days ago | IN | 0 ETH | 0.00134908 | ||||
Exit | 14977181 | 924 days ago | IN | 0 ETH | 0.00535166 | ||||
Exit | 14885952 | 939 days ago | IN | 0 ETH | 0.01992064 | ||||
Exit | 14636495 | 979 days ago | IN | 0 ETH | 0.01052892 | ||||
Exit | 13772411 | 1113 days ago | IN | 0 ETH | 0.0144647 | ||||
Exit | 13703030 | 1124 days ago | IN | 0 ETH | 0.01619565 | ||||
Exit | 13680062 | 1128 days ago | IN | 0 ETH | 0.02696805 | ||||
Exit | 13408975 | 1170 days ago | IN | 0 ETH | 0.01445522 | ||||
Exit | 13322065 | 1184 days ago | IN | 0 ETH | 0.02100034 | ||||
Exit | 13319836 | 1184 days ago | IN | 0 ETH | 0.00586174 | ||||
Transfer | 13308830 | 1186 days ago | IN | 0 ETH | 0.00687782 | ||||
Exit | 13294192 | 1188 days ago | IN | 0 ETH | 0.00702693 | ||||
Exit | 13252334 | 1195 days ago | IN | 0 ETH | 0.00882578 | ||||
Exit | 13242307 | 1196 days ago | IN | 0 ETH | 0.01081082 | ||||
Get Reward | 13242303 | 1196 days ago | IN | 0 ETH | 0.00911283 | ||||
Get Reward | 13237736 | 1197 days ago | IN | 0 ETH | 0.00377235 | ||||
Get Reward | 13208968 | 1202 days ago | IN | 0 ETH | 0.00640905 | ||||
Get Reward | 13201537 | 1203 days ago | IN | 0 ETH | 0.01138815 | ||||
Transfer | 13129406 | 1214 days ago | IN | 0 ETH | 0.01411293 | ||||
Transfer | 13129209 | 1214 days ago | IN | 0 ETH | 0.0325647 | ||||
Exit | 13124887 | 1215 days ago | IN | 0 ETH | 0.0078738 | ||||
Stake | 13095758 | 1219 days ago | IN | 0 ETH | 0.01668678 | ||||
Get Reward | 13072428 | 1223 days ago | IN | 0 ETH | 0.00287766 | ||||
Exit | 13021876 | 1231 days ago | IN | 0 ETH | 0.00728345 | ||||
Exit | 13015210 | 1232 days ago | IN | 0 ETH | 0.00680844 |
Latest 1 internal transaction
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11831258 | 1415 days ago | Contract Creation | 0 ETH |
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Contract Name:
UniV2StakeFarm
Compiler Version
v0.7.4+commit.3f05b770
Contract Source Code (Solidity Standard Json-Input format)
/* * Copyright (C) 2020-2021 The Wolfpack * This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance * * SPDX-License-Identifier: Apache-2.0 * See the file LICENSES/README.md for more information. */ pragma solidity >=0.6.0 <0.8.0; import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol'; import '@openzeppelin/contracts/math/SafeMath.sol'; import '@openzeppelin/contracts/access/Ownable.sol'; import '@openzeppelin/contracts/utils/ReentrancyGuard.sol'; import './interfaces/IController.sol'; import './interfaces/IFarm.sol'; import './interfaces/IStakeFarm.sol'; import '../../interfaces/uniswap/IUniswapV2Pair.sol'; contract UniV2StakeFarm is IFarm, IStakeFarm, Ownable, ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for IERC20; /* ========== STATE VARIABLES ========== */ IUniswapV2Pair public stakingToken; uint256 public override periodFinish = 0; uint256 public rewardRate = 0; uint256 public rewardsDuration = 7 days; uint256 public lastUpdateTime; uint256 public rewardPerTokenStored; uint256 private availableRewards; mapping(address => uint256) public userRewardPerTokenPaid; mapping(address => uint256) public rewards; // TODO: Remove next 2 lines after dapp launch (special reward condition) mapping(address => uint256) private firstStakeTime; uint256 private constant ETH_LIMIT = 2e17; uint256 private _totalSupply; mapping(address => uint256) private _balances; // Unique name of this farm instance, used in controller string private _farmName; // Uniswap route to get price for token 0 in pair IUniswapV2Pair public immutable route; // The address of the controller IController public controller; // The direction of the uniswap pairs uint8 public pairDirection; /* ========== CONSTRUCTOR ========== */ constructor( address _owner, string memory _name, address _stakingToken, address _rewardToken, address _controller, address _route ) { _farmName = _name; stakingToken = IUniswapV2Pair(_stakingToken); controller = IController(_controller); route = IUniswapV2Pair(_route); address routeLink; /** * @dev Calculate the sort order of the keys once to save gas in further steps * * Our token sort order is: * - stakeToken: token0[routeLink], token1[rewardToken] * - route: token0[routeLink], token1[stableCoin] * * If the sort order differs, we set one bit for each of both */ if (stakingToken.token0() == _rewardToken) { pairDirection = 1; routeLink = stakingToken.token1(); } else routeLink = stakingToken.token0(); if ( address(_route) != address(0) && IUniswapV2Pair(_route).token1() == routeLink ) pairDirection |= 2; transferOwnership(_owner); } /* ========== VIEWS ========== */ function farmName() external view override returns (string memory) { return _farmName; } function totalSupply() external view returns (uint256) { return _totalSupply; } function balanceOf(address account) external view returns (uint256) { return _balances[account]; } function lastTimeRewardApplicable() public view returns (uint256) { // solhint-disable-next-line not-rely-on-time return block.timestamp < periodFinish ? block.timestamp : periodFinish; } function rewardPerToken() public view returns (uint256) { if (_totalSupply == 0) { return rewardPerTokenStored; } return rewardPerTokenStored.add( lastTimeRewardApplicable() .sub(lastUpdateTime) .mul(rewardRate) .mul(1e18) .div(_totalSupply) ); } function earned(address account) public view returns (uint256) { return _balances[account] .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) .div(1e18) .add(rewards[account]); } function getRewardForDuration() external view returns (uint256) { return rewardRate.mul(rewardsDuration); } function getUIData(address _user) external view returns (uint256[9] memory) { (uint112 reserve0, uint112 reserve1, uint256 price) = _getTokenUiData(); uint256[9] memory result = [ // Pool stakingToken.totalSupply(), (uint256(reserve0)), (uint256(reserve1)), price, // Stake _totalSupply, _balances[_user], rewardsDuration, rewardRate.mul(rewardsDuration), earned(_user) ]; return result; } /* ========== MUTATIVE FUNCTIONS ========== */ function stake(uint256 amount) external override nonReentrant updateReward(msg.sender) { require(amount > 0, 'Cannot stake 0'); /*(uint256 fee) = */ controller.onDeposit(amount); _totalSupply = _totalSupply.add(amount); _balances[msg.sender] = _balances[msg.sender].add(amount); IERC20(address(stakingToken)).safeTransferFrom( msg.sender, address(this), amount ); // TODO: Remove after launch if ( firstStakeTime[msg.sender] == 0 && _ethAmount(_balances[msg.sender]) >= ETH_LIMIT // solhint-disable-next-line not-rely-on-time ) firstStakeTime[msg.sender] = block.timestamp; emit Staked(msg.sender, amount); } function unstake(uint256 amount) public override nonReentrant updateReward(msg.sender) { require(amount > 0, 'Cannot withdraw 0'); /*(uint256 fee) = */ controller.onWithdraw(amount); _totalSupply = _totalSupply.sub(amount); _balances[msg.sender] = _balances[msg.sender].sub(amount); IERC20(address(stakingToken)).safeTransfer(msg.sender, amount); // TODO: Remove after launch if ( firstStakeTime[msg.sender] > 0 && (_balances[msg.sender] == 0 || _ethAmount(_balances[msg.sender]) < ETH_LIMIT) ) firstStakeTime[msg.sender] = 0; emit Unstaked(msg.sender, amount); } function transfer(address recipient, uint256 amount) external override updateReward(msg.sender) updateReward(recipient) { require(recipient != address(0), 'invalid address'); require(amount > 0, 'zero amount'); _balances[msg.sender] = _balances[msg.sender].sub(amount); _balances[recipient] = _balances[recipient].add(amount); emit Transfered(msg.sender, recipient, amount); } function getReward() public override nonReentrant updateReward(msg.sender) { uint256 reward = rewards[msg.sender]; if (reward > 0) { rewards[msg.sender] = 0; availableRewards = availableRewards.sub(reward); controller.payOutRewards(msg.sender, reward); emit RewardPaid(msg.sender, reward); } } function exit() external override { unstake(_balances[msg.sender]); getReward(); } /* ========== RESTRICTED FUNCTIONS ========== */ function setController(address newController) external override onlyController { controller = IController(newController); emit ControllerChanged(newController); } function notifyRewardAmount(uint256 reward) external override onlyController updateReward(address(0)) { // solhint-disable-next-line not-rely-on-time if (block.timestamp >= periodFinish) { rewardRate = reward.div(rewardsDuration); } else { // solhint-disable-next-line not-rely-on-time uint256 remaining = periodFinish.sub(block.timestamp); uint256 leftover = remaining.mul(rewardRate); rewardRate = reward.add(leftover).div(rewardsDuration); } availableRewards = availableRewards.add(reward); // Ensure the provided reward amount is not more than the balance in the // contract. // // This keeps the reward rate in the right range, preventing overflows due // to very high values of rewardRate in the earned and rewardsPerToken // functions. // // Reward + leftover must be less than 2^256 / 10^18 to avoid overflow. // require( rewardRate <= availableRewards.div(rewardsDuration), 'Provided reward too high' ); // solhint-disable-next-line not-rely-on-time lastUpdateTime = block.timestamp; // solhint-disable-next-line not-rely-on-time periodFinish = block.timestamp.add(rewardsDuration); emit RewardAdded(reward); } // We don't have any rebalancing here // solhint-disable-next-line no-empty-blocks function rebalance() external override onlyController {} // Added to support recovering LP Rewards from other systems to be distributed to holders function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner { // Cannot recover the staking token or the rewards token require( tokenAddress != address(stakingToken), 'pool tokens not recoverable' ); IERC20(tokenAddress).safeTransfer(owner(), tokenAmount); emit Recovered(tokenAddress, tokenAmount); } function setRewardsDuration(uint256 _rewardsDuration) external override onlyOwner { require( // solhint-disable-next-line not-rely-on-time periodFinish == 0 || block.timestamp > periodFinish, 'reward period not finished' ); rewardsDuration = _rewardsDuration; emit RewardsDurationUpdated(rewardsDuration); } /* ========== PRIVATE ========== */ function _ethAmount(uint256 amountToken) private view returns (uint256) { (uint112 reserve0, uint112 reserve1, ) = stakingToken.getReserves(); // RouteLink is token1, swap if ((pairDirection & 1) != 0) reserve0 = reserve1; return (uint256(reserve0).mul(amountToken)).div(stakingToken.totalSupply()); } /** * @dev Returns the reserves in order: ETH -> Token, ETH/stable */ function _getTokenUiData() internal view returns ( uint112, uint112, uint256 ) { (uint112 reserve0, uint112 reserve1, ) = stakingToken.getReserves(); (uint112 reserve0R, uint112 reserve1R, ) = address(route) != address(0) ? route.getReserves() : (1, 1, 0); uint112 swap; // RouteLink is token1, swap if ((pairDirection & 1) != 0) { swap = reserve0; reserve0 = reserve1; reserve1 = swap; } // RouteLink is token1, swap if ((pairDirection & 2) != 0) { swap = reserve0R; reserve0R = reserve1R; reserve1R = swap; } return (reserve0, reserve1, uint256(reserve0R).mul(1e18).div(reserve1R)); } /* ========== MODIFIERS ========== */ modifier onlyController { require(_msgSender() == address(controller), 'not controller'); _; } modifier updateReward(address account) { rewardPerTokenStored = rewardPerToken(); lastUpdateTime = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account] = earned(account); userRewardPerTokenPaid[account] = rewardPerTokenStored; } _; } /* ========== EVENTS ========== */ event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Unstaked(address indexed user, uint256 amount); event Transfered(address indexed from, address indexed to, uint256 amount); event RewardPaid(address indexed user, uint256 reward); event RewardsDurationUpdated(uint256 newDuration); event Recovered(address token, uint256 amount); event ControllerChanged(address newController); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <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 () internal { 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; } }
// 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; } }
// 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; import "./IERC20.sol"; import "../../math/SafeMath.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 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"); } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// 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 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 () internal { _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 make 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; } }
/* * Copyright (C) 2020-2021 The Wolfpack * This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance * * This file is derived from Uniswap, available under the GNU General Public * License 3.0. https://uniswap.org/ * * SPDX-License-Identifier: Apache-2.0 AND GPL-3.0-or-later * See the file LICENSES/README.md for more information. */ pragma solidity >=0.6.0; interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint256 value); event Transfer(address indexed from, address indexed to, uint256 value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address owner) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 value) external returns (bool); function transfer(address to, uint256 value) external returns (bool); function transferFrom( address from, address to, uint256 value ) external returns (bool); // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); // solhint-disable-next-line func-name-mixedcase 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); // solhint-disable-next-line func-name-mixedcase 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; }
/* * Copyright (C) 2020-2021 The Wolfpack * This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance * * SPDX-License-Identifier: Apache-2.0 * See the file LICENSES/README.md for more information. */ pragma solidity >=0.6.0 <0.8.0; interface IController { /** * @dev Revert on failure, return deposit fee in 1e-18/fee notation on success */ function onDeposit(uint256 amount) external view returns (uint256 fee); /** * @dev Revert on failure, return withdrawal fee in 1e-18/fee notation on success */ function onWithdraw(uint256 amount) external view returns (uint256 fee); /** * @dev Distribute rewards to sender and fee to internal contracts */ function payOutRewards(address recipient, uint256 amount) external; }
/* * Copyright (C) 2020-2021 The Wolfpack * This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance * * SPDX-License-Identifier: Apache-2.0 * See the file LICENSES/README.md for more information. */ pragma solidity >=0.6.0 <0.8.0; interface IFarm { /** * @dev Return a unique farm name */ function farmName() external view returns (string memory); /** * @dev Return when reward period is finished (UTC timestamp) */ function periodFinish() external view returns (uint256); /** * @dev Sets a new controller, can only called by current controller */ function setController(address newController) external; /** * @dev This function must be called initially and close at the time the * reward period ends */ function notifyRewardAmount(uint256 reward) external; /** * @dev Set the duration of farm rewards, to continue rewards, * notifyRewardAmount() has to called for the next period */ function setRewardsDuration(uint256 _rewardsDuration) external; /** * @dev Rebalance strategies (if implemented) */ function rebalance() external; }
/* * Copyright (C) 2020-2021 The Wolfpack * This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance * * SPDX-License-Identifier: Apache-2.0 * See the file LICENSES/README.md for more information. */ pragma solidity >=0.6.0 <0.8.0; /** * @title IStakeFarm * * @dev IStakeFarm is the business logic interface to staking farms. */ interface IStakeFarm { /** * @dev Stake amount of ERC20 tokens and earn rewards */ function stake(uint256 amount) external; /** * @dev Unstake amount of previous staked tokens, rewards will not be claimed */ function unstake(uint256 amount) external; /** * @dev Claim rewards harvested during stake time */ function getReward() external; /** * @dev Unstake and getRewards in a single step */ function exit() external; /** * @dev Transfer amount of stake from msg.sender to recipient. */ function transfer(address recipient, uint256 amount) external; }
{ "evmVersion": "berlin", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 1000000 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } } }
Contract Security Audit
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IUniswapV2Pair","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"unstake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _owner (address): 0xC65e799100A42D97e5aD26ecB949fA880D8bc99d
Arg [1] : _name (string): WETH/WOWS LP Farm
Arg [2] : _stakingToken (address): 0xDf21bb85a5BFb606bfCa4562aA8CEA2017622415
Arg [3] : _rewardToken (address): 0x672EF7E4Fe230B5cA1466C5fDD40588d30FdF90a
Arg [4] : _controller (address): 0x91756429a3C7b74326e7c2DdE3c8356e55086522
Arg [5] : _route (address): 0x0000000000000000000000000000000000000000
-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 000000000000000000000000c65e799100a42d97e5ad26ecb949fa880d8bc99d
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 000000000000000000000000df21bb85a5bfb606bfca4562aa8cea2017622415
Arg [3] : 000000000000000000000000672ef7e4fe230b5ca1466c5fdd40588d30fdf90a
Arg [4] : 00000000000000000000000091756429a3c7b74326e7c2dde3c8356e55086522
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000011
Arg [7] : 574554482f574f5753204c50204661726d000000000000000000000000000000
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Multichain Portfolio | 30 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.