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Latest 25 from a total of 2,247 transactions
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Stake | 21463435 | 30 hrs ago | IN | 0 ETH | 0.00042311 | ||||
Get Reward | 21463431 | 30 hrs ago | IN | 0 ETH | 0.00052824 | ||||
Re Stake | 21457101 | 2 days ago | IN | 0 ETH | 0.0003577 | ||||
Re Stake | 21456934 | 2 days ago | IN | 0 ETH | 0.00049265 | ||||
Re Stake | 21452867 | 2 days ago | IN | 0 ETH | 0.00079001 | ||||
Re Stake | 21437229 | 4 days ago | IN | 0 ETH | 0.00103533 | ||||
Re Stake | 21435623 | 5 days ago | IN | 0 ETH | 0.00075367 | ||||
Re Stake | 21435454 | 5 days ago | IN | 0 ETH | 0.00085012 | ||||
Re Stake | 21435433 | 5 days ago | IN | 0 ETH | 0.00090267 | ||||
Re Stake | 21435110 | 5 days ago | IN | 0 ETH | 0.00075515 | ||||
Get Reward | 21435093 | 5 days ago | IN | 0 ETH | 0.00096142 | ||||
Stake | 21434764 | 5 days ago | IN | 0 ETH | 0.00122226 | ||||
Get Reward | 21434749 | 5 days ago | IN | 0 ETH | 0.0011252 | ||||
Re Stake | 21434531 | 5 days ago | IN | 0 ETH | 0.00072009 | ||||
Re Stake | 21433061 | 5 days ago | IN | 0 ETH | 0.0009275 | ||||
Re Stake | 21431639 | 5 days ago | IN | 0 ETH | 0.00158741 | ||||
Re Stake | 21431187 | 5 days ago | IN | 0 ETH | 0.00159422 | ||||
Stake | 21430726 | 5 days ago | IN | 0 ETH | 0.00396418 | ||||
Re Stake | 21430645 | 5 days ago | IN | 0 ETH | 0.00195595 | ||||
Re Stake | 21430149 | 5 days ago | IN | 0 ETH | 0.00159079 | ||||
Re Stake | 21429809 | 5 days ago | IN | 0 ETH | 0.00111794 | ||||
Re Stake | 21429700 | 5 days ago | IN | 0 ETH | 0.00113937 | ||||
Re Stake | 21429519 | 6 days ago | IN | 0 ETH | 0.00142506 | ||||
Re Stake | 21429480 | 6 days ago | IN | 0 ETH | 0.00151595 | ||||
Re Stake | 21429349 | 6 days ago | IN | 0 ETH | 0.00123406 |
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16832339 | 650 days ago | Contract Creation | 0 ETH |
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Minimal Proxy Contract for 0xb851ba24265605163a624a1a9ecbddcd9e17c7a8
Contract Name:
StakingRewards
Compiler Version
v0.5.16+commit.9c3226ce
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT // @unsupported: ovm pragma solidity 0.5.16; import "./openzeppelin-solidity-2.3.0/contracts/math/Math.sol"; import "./openzeppelin-solidity-2.3.0/contracts/math/SafeMath.sol"; import "./openzeppelin-solidity-2.3.0/contracts/token/ERC20/ERC20Detailed.sol"; import "./openzeppelin-solidity-2.3.0/contracts/token/ERC20/SafeERC20.sol"; import "./openzeppelin-solidity-2.3.0/contracts/utils/ReentrancyGuard.sol"; // https://docs.synthetix.io/contracts/source/contracts/stakingrewards /// @notice The Staking rewards contract for ALC adopted for ETH as the rewards token contract StakingRewards is ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for IERC20; /* ========== STATE VARIABLES ========== */ IERC20 public rewardsToken; IERC20 public stakingToken; uint256 public periodFinish = 0; uint256 public rewardRate = 0; uint256 public rewardsDuration; uint256 public lastUpdateTime; uint256 public rewardPerTokenStored; uint256 public lockTime; address public rewardsDistribution; mapping(address => uint256) public userRewardPerTokenPaid; mapping(address => uint256) public rewards; uint256 private _totalSupply; mapping(address => uint256) private _balances; mapping(address => uint256) private _userLockTime; address owner; modifier onlyOwner { _onlyOwner(); _; } function _onlyOwner() private view { require(msg.sender == owner, "Only the contract owner may perform this action"); } modifier onlyRewardsDistribution() { require(msg.sender == rewardsDistribution, "Caller is not RewardsDistribution contract"); _; } function setRewardsDistribution(address _rewardsDistribution) external onlyOwner { rewardsDistribution = _rewardsDistribution; } /* ========== CONSTRUCTOR ========== */ constructor() public{ owner = address(1); } function initialize( address _owner, address _rewardsDistribution, address _stakingToken, address _rewardsToken, uint256 _lockTime ) external { require(owner == address(0), "already initialized"); require(_owner != address(0), "_owner cannot be null"); owner = _owner; stakingToken = IERC20(_stakingToken); rewardsToken = IERC20(_rewardsToken); rewardsDistribution = _rewardsDistribution; lockTime = _lockTime; } /* ========== VIEWS ========== */ 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) { return Math.min(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); } /* ========== MUTATIVE FUNCTIONS ========== */ 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); if (block.timestamp > _userLockTime[msg.sender]) { _userLockTime[msg.sender] = block.timestamp + lockTime; } emit Staked(msg.sender, amount); } function reStake() external nonReentrant updateReward(msg.sender) { require(stakingToken == rewardsToken, "cant restake"); uint256 reward = rewards[msg.sender]; if (reward > 0) { rewards[msg.sender] = 0; _totalSupply = _totalSupply.add(reward); _balances[msg.sender] = _balances[msg.sender].add(reward); emit Staked(msg.sender, reward); } } function withdraw(uint256 amount) public nonReentrant updateReward(msg.sender) { require(amount > 0, "Cannot withdraw 0"); require(block.timestamp > _userLockTime[msg.sender], "locktime not over"); _totalSupply = _totalSupply.sub(amount); _balances[msg.sender] = _balances[msg.sender].sub(amount); stakingToken.safeTransfer(msg.sender, amount); emit Withdrawn(msg.sender, amount); } function getUserLockTime(address user) public view returns(uint) { return _userLockTime[user]; } function getReward() public nonReentrant updateReward(msg.sender) { uint256 reward = rewards[msg.sender]; if (reward > 0) { rewards[msg.sender] = 0; rewardsToken.safeTransfer(msg.sender, reward); emit RewardPaid(msg.sender, reward); } } function exit() external { withdraw(_balances[msg.sender]); getReward(); } /* ========== RESTRICTED FUNCTIONS ========== */ function notifyRewardAmount(uint256 reward) external onlyRewardsDistribution updateReward(address(0)) { if (block.timestamp >= periodFinish) { rewardRate = reward.div(rewardsDuration); } else { uint256 remaining = periodFinish.sub(block.timestamp); uint256 leftover = remaining.mul(rewardRate); rewardRate = reward.add(leftover).div(rewardsDuration); } // 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. uint balance = rewardsToken.balanceOf(address(this))-_totalSupply; require(rewardRate <= balance.div(rewardsDuration), "Provided reward too high"); lastUpdateTime = block.timestamp; periodFinish = block.timestamp.add(rewardsDuration); emit RewardAdded(reward); } // End rewards emission earlier function updatePeriodFinish(uint timestamp) external onlyOwner updateReward(address(0)) { periodFinish = timestamp; } // 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 the staking token"); IERC20(tokenAddress).safeTransfer(owner, tokenAmount); emit Recovered(tokenAddress, tokenAmount); } function changeOwner(address _owner) external onlyOwner { require(_owner != address(0), "not zero address"); owner = _owner; } function setRewardsDuration(uint256 _rewardsDuration) external onlyOwner { require( block.timestamp > periodFinish, "Previous rewards period must be complete before changing the duration for the new period" ); rewardsDuration = _rewardsDuration; emit RewardsDurationUpdated(rewardsDuration); } /** * fallback function for collection funds */ function() external payable {} /* ========== MODIFIERS ========== */ 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 Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, uint256 reward); event RewardsDurationUpdated(uint256 newDuration); event Recovered(address token, uint256 amount); }
pragma solidity ^0.5.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } }
pragma solidity ^0.5.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } }
pragma solidity ^0.5.0; import "./IERC20.sol"; /** * @dev Optional functions from the ERC20 standard. */ contract ERC20Detailed is IERC20 { string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of * these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. * * > Note that 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; } }
pragma solidity ^0.5.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. Does not include * the optional functions; to access them see `ERC20Detailed`. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through `transferFrom`. This is * zero by default. * * This value changes when `approve` or `transferFrom` are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * > Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an `Approval` event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to `approve`. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
pragma solidity ^0.5.0; 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 ERC20;` 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)); } 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"); } } }
pragma solidity ^0.5.0; /** * @dev Collection of functions related to the address type */ 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; } /** * @dev Converts an `address` into `address payable`. Note that this is * simply a type cast: the actual underlying value is not changed. */ function toPayable(address account) internal pure returns (address payable) { return address(uint160(account)); } }
pragma solidity ^0.5.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the `nonReentrant` modifier * available, which can be aplied 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. */ 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"); } }
{ "optimizer": { "enabled": false, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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"address"}],"name":"rewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rewardsDistribution","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rewardsDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rewardsToken","outputs":[{"internalType":"contract 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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.