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Latest 25 from a total of 184 transactions
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Withdraw | 19823759 | 114 days ago | IN | 0 ETH | 0.00042263 | ||||
Stake | 18073039 | 359 days ago | IN | 0 ETH | 0.00410451 | ||||
Get Reward | 17983245 | 372 days ago | IN | 0 ETH | 0.00201597 | ||||
Withdraw | 16550051 | 574 days ago | IN | 0 ETH | 0.00289215 | ||||
Stake | 16424365 | 591 days ago | IN | 0 ETH | 0.00178097 | ||||
Stake | 16417903 | 592 days ago | IN | 0 ETH | 0.00182085 | ||||
Stake | 16415591 | 592 days ago | IN | 0 ETH | 0.00295039 | ||||
Stake | 16412324 | 593 days ago | IN | 0 ETH | 0.00212268 | ||||
Get Reward | 15906616 | 663 days ago | IN | 0 ETH | 0.00193549 | ||||
Stake | 15540910 | 714 days ago | IN | 0 ETH | 0.00167786 | ||||
Stake | 15535811 | 715 days ago | IN | 0 ETH | 0.00179414 | ||||
Stake | 15510760 | 719 days ago | IN | 0 ETH | 0.0011113 | ||||
Stake | 15469886 | 726 days ago | IN | 0 ETH | 0.00095916 | ||||
Stake | 15451896 | 729 days ago | IN | 0 ETH | 0.00198696 | ||||
Stake | 15436563 | 731 days ago | IN | 0 ETH | 0.00424665 | ||||
Stake | 15429631 | 732 days ago | IN | 0 ETH | 0.00261262 | ||||
Stake | 15424244 | 733 days ago | IN | 0 ETH | 0.00105229 | ||||
Stake | 15409082 | 736 days ago | IN | 0 ETH | 0.00097615 | ||||
Stake | 15371865 | 742 days ago | IN | 0 ETH | 0.00314552 | ||||
Get Reward | 15347518 | 746 days ago | IN | 0 ETH | 0.00242626 | ||||
Stake | 15332297 | 748 days ago | IN | 0 ETH | 0.0015716 | ||||
Stake | 15310371 | 751 days ago | IN | 0 ETH | 0.00140376 | ||||
Stake | 15258930 | 759 days ago | IN | 0 ETH | 0.00193983 | ||||
Stake | 15257033 | 760 days ago | IN | 0 ETH | 0.00148113 | ||||
Stake | 15250056 | 761 days ago | IN | 0 ETH | 0.0007685 |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x73072b52...745a783a6 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
MultiRewards
Compiler Version
v0.5.17+commit.d19bba13
Contract Source Code (Solidity Standard Json-Input format)
pragma solidity 0.5.17; library Address { /** * @dev Returns true if `account` is a contract. * * This test is non-exhaustive, and there may be false-negatives: during the * execution of a contract's constructor, its address will be reported as * not containing a contract. * * > It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. */ 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; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through `transferFrom`. This is * zero by default. * * This value changes when `approve` or `transferFrom` are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * > Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an `Approval` event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to `approve`. `value` is the new allowance. */ event Approval( address indexed owner, address indexed spender, uint256 value ); } library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + (((a % 2) + (b % 2)) / 2); } } contract ReentrancyGuard { /// @dev counter to allow mutex lock with only one SSTORE operation uint256 private _guardCounter; constructor() internal { // The counter starts at one to prevent changing it from zero to a non-zero // value, which is a more expensive operation. _guardCounter = 1; } /** * @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() { _guardCounter += 1; uint256 localCounter = _guardCounter; _; require( localCounter == _guardCounter, "ReentrancyGuard: reentrant call" ); } } 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) ); } 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 ); 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. // A Solidity high level call has three parts: // 1. The target address is checked to verify it contains contract code // 2. The call itself is made, and success asserted // 3. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line max-line-length 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" ); } } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } } contract MultiRewards is ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for IERC20; /* ========== STATE VARIABLES ========== */ struct Reward { address rewardsDistributor; uint256 rewardsDuration; uint256 periodFinish; uint256 rewardRate; uint256 lastUpdateTime; uint256 rewardPerTokenStored; } IERC20 public stakingToken; mapping(address => Reward) public rewardData; address[] public rewardTokens; // user -> reward token -> amount mapping(address => mapping(address => uint256)) public userRewardPerTokenPaid; mapping(address => mapping(address => uint256)) public rewards; uint256 private _totalSupply; mapping(address => uint256) private _balances; address private owner; /* ========== CONSTRUCTOR ========== */ constructor(address _owner, address _stakingToken) public { stakingToken = IERC20(_stakingToken); owner = _owner; } modifier onlyOwner() { require(owner == msg.sender, "Ownable: caller is not the owner"); _; } function addReward( address _rewardsToken, address _rewardsDistributor, uint256 _rewardsDuration ) public onlyOwner { require(rewardData[_rewardsToken].rewardsDuration == 0); rewardTokens.push(_rewardsToken); rewardData[_rewardsToken].rewardsDistributor = _rewardsDistributor; rewardData[_rewardsToken].rewardsDuration = _rewardsDuration; } /* ========== VIEWS ========== */ function totalSupply() external view returns (uint256) { return _totalSupply; } function balanceOf(address account) external view returns (uint256) { return _balances[account]; } function lastTimeRewardApplicable(address _rewardsToken) public view returns (uint256) { return Math.min(block.timestamp, rewardData[_rewardsToken].periodFinish); } function rewardPerToken(address _rewardsToken) public view returns (uint256) { if (_totalSupply == 0) { return rewardData[_rewardsToken].rewardPerTokenStored; } return rewardData[_rewardsToken].rewardPerTokenStored.add( lastTimeRewardApplicable(_rewardsToken) .sub(rewardData[_rewardsToken].lastUpdateTime) .mul(rewardData[_rewardsToken].rewardRate) .mul(1e18) .div(_totalSupply) ); } function earned(address account, address _rewardsToken) public view returns (uint256) { return _balances[account] .mul( rewardPerToken(_rewardsToken).sub( userRewardPerTokenPaid[account][_rewardsToken] ) ) .div(1e18) .add(rewards[account][_rewardsToken]); } function getRewardForDuration(address _rewardsToken) external view returns (uint256) { return rewardData[_rewardsToken].rewardRate.mul( rewardData[_rewardsToken].rewardsDuration ); } /* ========== MUTATIVE FUNCTIONS ========== */ function setRewardsDistributor( address _rewardsToken, address _rewardsDistributor ) external onlyOwner { rewardData[_rewardsToken].rewardsDistributor = _rewardsDistributor; } function stake(uint256 amount) external nonReentrant updateReward(msg.sender) { require(amount > 0, "Cannot stake 0"); _totalSupply = _totalSupply.add(amount); _balances[msg.sender] = _balances[msg.sender].add(amount); stakingToken.safeTransferFrom(msg.sender, address(this), amount); emit Staked(msg.sender, amount); } function withdraw(uint256 amount) public nonReentrant updateReward(msg.sender) { require(amount > 0, "Cannot withdraw 0"); _totalSupply = _totalSupply.sub(amount); _balances[msg.sender] = _balances[msg.sender].sub(amount); stakingToken.safeTransfer(msg.sender, amount); emit Withdrawn(msg.sender, amount); } function getReward() public nonReentrant updateReward(msg.sender) { for (uint256 i; i < rewardTokens.length; i++) { address _rewardsToken = rewardTokens[i]; uint256 reward = rewards[msg.sender][_rewardsToken]; if (reward > 0) { rewards[msg.sender][_rewardsToken] = 0; IERC20(_rewardsToken).safeTransfer(msg.sender, reward); emit RewardPaid(msg.sender, _rewardsToken, reward); } } } function exit() external { withdraw(_balances[msg.sender]); getReward(); } /* ========== RESTRICTED FUNCTIONS ========== */ function notifyRewardAmount(address _rewardsToken, uint256 reward) external updateReward(address(0)) { require(rewardData[_rewardsToken].rewardsDistributor == msg.sender); // handle the transfer of reward tokens via `transferFrom` to reduce the number // of transactions required and ensure correctness of the reward amount IERC20(_rewardsToken).safeTransferFrom( msg.sender, address(this), reward ); if (block.timestamp >= rewardData[_rewardsToken].periodFinish) { rewardData[_rewardsToken].rewardRate = reward.div( rewardData[_rewardsToken].rewardsDuration ); } else { uint256 remaining = rewardData[_rewardsToken].periodFinish.sub( block.timestamp ); uint256 leftover = remaining.mul( rewardData[_rewardsToken].rewardRate ); rewardData[_rewardsToken].rewardRate = reward.add(leftover).div( rewardData[_rewardsToken].rewardsDuration ); } rewardData[_rewardsToken].lastUpdateTime = block.timestamp; rewardData[_rewardsToken].periodFinish = block.timestamp.add( rewardData[_rewardsToken].rewardsDuration ); emit RewardAdded(reward); } // Added to support recovering LP Rewards from other systems such as BAL to be distributed to holders function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner { require( tokenAddress != address(stakingToken), "Cannot withdraw staking token" ); require( rewardData[tokenAddress].lastUpdateTime == 0, "Cannot withdraw reward token" ); IERC20(tokenAddress).safeTransfer(owner, tokenAmount); emit Recovered(tokenAddress, tokenAmount); } function setRewardsDuration(address _rewardsToken, uint256 _rewardsDuration) external { require( block.timestamp > rewardData[_rewardsToken].periodFinish, "Reward period still active" ); require(rewardData[_rewardsToken].rewardsDistributor == msg.sender); require(_rewardsDuration > 0, "Reward duration must be non-zero"); rewardData[_rewardsToken].rewardsDuration = _rewardsDuration; emit RewardsDurationUpdated( _rewardsToken, rewardData[_rewardsToken].rewardsDuration ); } /* ========== MODIFIERS ========== */ modifier updateReward(address account) { for (uint256 i; i < rewardTokens.length; i++) { address token = rewardTokens[i]; rewardData[token].rewardPerTokenStored = rewardPerToken(token); rewardData[token].lastUpdateTime = lastTimeRewardApplicable(token); if (account != address(0)) { rewards[account][token] = earned(account, token); userRewardPerTokenPaid[account][token] = rewardData[token] .rewardPerTokenStored; } } _; } /* ========== EVENTS ========== */ event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid( address indexed user, address indexed rewardsToken, uint256 reward ); event RewardsDurationUpdated(address token, uint256 newDuration); event Recovered(address token, uint256 amount); }
{ "evmVersion": "istanbul", "optimizer": { "enabled": true, "runs": 200 }, "libraries": { "MultiRewards.sol": {} }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_rewardsToken","type":"address"},{"internalType":"address","name":"_rewardsDistributor","type":"address"}],"name":"setRewardsDistributor","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_rewardsToken","type":"address"},{"internalType":"uint256","name":"_rewardsDuration","type":"uint256"}],"name":"setRewardsDuration","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"stake","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"stakingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]
Deployed Bytecode
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ETH | 100.00% | $2,515.28 | 0.00026464 | $0.6656 |
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