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Latest 25 from a total of 5,076 transactions
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Withdraw | 19449819 | 108 days ago | IN | 0 ETH | 0.00295177 | ||||
Withdraw | 19449769 | 108 days ago | IN | 0 ETH | 0.00202297 | ||||
Withdraw | 19449753 | 108 days ago | IN | 0 ETH | 0.00217849 | ||||
Withdraw | 19449687 | 108 days ago | IN | 0 ETH | 0.00206179 | ||||
Withdraw | 19449678 | 108 days ago | IN | 0 ETH | 0.0039866 | ||||
Stake | 15872832 | 610 days ago | IN | 0 ETH | 0.00043446 | ||||
Deposit | 15250830 | 703 days ago | IN | 0 ETH | 0.00144384 | ||||
Deposit | 15250786 | 703 days ago | IN | 0 ETH | 0.00063814 | ||||
Harvest | 15066569 | 731 days ago | IN | 0 ETH | 0.00048359 | ||||
Withdraw | 14635511 | 803 days ago | IN | 0 ETH | 0.0066697 | ||||
Withdraw | 14613011 | 806 days ago | IN | 0 ETH | 0.00264524 | ||||
Withdraw | 14579242 | 811 days ago | IN | 0 ETH | 0.00375987 | ||||
Withdraw | 14565819 | 814 days ago | IN | 0 ETH | 0.00159312 | ||||
Withdraw | 14565819 | 814 days ago | IN | 0 ETH | 0.00159312 | ||||
Withdraw | 14565819 | 814 days ago | IN | 0 ETH | 0.00159312 | ||||
Withdraw | 14565819 | 814 days ago | IN | 0 ETH | 0.00159312 | ||||
Withdraw | 14565819 | 814 days ago | IN | 0 ETH | 0.00578831 | ||||
Withdraw | 14529599 | 819 days ago | IN | 0 ETH | 0.00184398 | ||||
Withdraw | 14529599 | 819 days ago | IN | 0 ETH | 0.00184369 | ||||
Withdraw | 14529599 | 819 days ago | IN | 0 ETH | 0.00184369 | ||||
Withdraw | 14529295 | 819 days ago | IN | 0 ETH | 0.00894867 | ||||
Stake | 14521970 | 820 days ago | IN | 0 ETH | 0.00156821 | ||||
Withdraw | 14519101 | 821 days ago | IN | 0 ETH | 0.00439598 | ||||
Withdraw | 14516182 | 821 days ago | IN | 0 ETH | 0.00311818 | ||||
Withdraw | 14503446 | 823 days ago | IN | 0 ETH | 0.01118791 |
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Contract Name:
StakingPoolForUniswapV2Tokens
Compiler Version
v0.8.7+commit.e28d00a7
Optimization Enabled:
Yes with 888888 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; import {Pausable} from "@openzeppelin/contracts/security/Pausable.sol"; import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {TokenDistributor} from "./TokenDistributor.sol"; import {TokenSplitter} from "./TokenSplitter.sol"; /** * @title StakingPoolForUniswapV2Tokens * @notice It is a staking pool for Uniswap V2 LP tokens (stake Uniswap V2 LP tokens -> get LOOKS). */ contract StakingPoolForUniswapV2Tokens is Ownable, Pausable, ReentrancyGuard { using SafeERC20 for IERC20; struct UserInfo { uint256 amount; // Amount of staked tokens provided by user uint256 rewardDebt; // Reward debt } // Precision factor for reward calculation uint256 public constant PRECISION_FACTOR = 10**12; // LOOKS token (token distributed) IERC20 public immutable looksRareToken; // The staked token (i.e., Uniswap V2 WETH/LOOKS LP token) IERC20 public immutable stakedToken; // Block number when rewards start uint256 public immutable START_BLOCK; // Accumulated tokens per share uint256 public accTokenPerShare; // Block number when rewards end uint256 public endBlock; // Block number of the last update uint256 public lastRewardBlock; // Tokens distributed per block (in looksRareToken) uint256 public rewardPerBlock; // UserInfo for users that stake tokens (stakedToken) mapping(address => UserInfo) public userInfo; event AdminRewardWithdraw(uint256 amount); event Deposit(address indexed user, uint256 amount, uint256 harvestedAmount); event EmergencyWithdraw(address indexed user, uint256 amount); event Harvest(address indexed user, uint256 harvestedAmount); event NewRewardPerBlockAndEndBlock(uint256 rewardPerBlock, uint256 endBlock); event Withdraw(address indexed user, uint256 amount, uint256 harvestedAmount); /** * @notice Constructor * @param _stakedToken staked token address * @param _looksRareToken reward token address * @param _rewardPerBlock reward per block (in LOOKS) * @param _startBlock start block * @param _endBlock end block */ constructor( address _stakedToken, address _looksRareToken, uint256 _rewardPerBlock, uint256 _startBlock, uint256 _endBlock ) { stakedToken = IERC20(_stakedToken); looksRareToken = IERC20(_looksRareToken); rewardPerBlock = _rewardPerBlock; START_BLOCK = _startBlock; endBlock = _endBlock; // Set the lastRewardBlock as the start block lastRewardBlock = _startBlock; } /** * @notice Deposit staked tokens and collect reward tokens (if any) * @param amount amount to deposit (in stakedToken) */ function deposit(uint256 amount) external nonReentrant { require(amount > 0, "Deposit: Amount must be > 0"); _updatePool(); uint256 pendingRewards; if (userInfo[msg.sender].amount > 0) { pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; if (pendingRewards > 0) { looksRareToken.safeTransfer(msg.sender, pendingRewards); } } stakedToken.safeTransferFrom(msg.sender, address(this), amount); userInfo[msg.sender].amount += amount; userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; emit Deposit(msg.sender, amount, pendingRewards); } /** * @notice Harvest tokens that are pending */ function harvest() external nonReentrant { _updatePool(); uint256 pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; require(pendingRewards > 0, "Harvest: Pending rewards must be > 0"); userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; looksRareToken.safeTransfer(msg.sender, pendingRewards); emit Harvest(msg.sender, pendingRewards); } /** * @notice Withdraw staked tokens and give up rewards * @dev Only for emergency. It does not update the pool. */ function emergencyWithdraw() external nonReentrant whenPaused { uint256 userBalance = userInfo[msg.sender].amount; require(userBalance != 0, "Withdraw: Amount must be > 0"); // Reset internal value for user userInfo[msg.sender].amount = 0; userInfo[msg.sender].rewardDebt = 0; stakedToken.safeTransfer(msg.sender, userBalance); emit EmergencyWithdraw(msg.sender, userBalance); } /** * @notice Withdraw staked tokens and collect reward tokens * @param amount amount to withdraw (in stakedToken) */ function withdraw(uint256 amount) external nonReentrant { require( (userInfo[msg.sender].amount >= amount) && (amount > 0), "Withdraw: Amount must be > 0 or lower than user balance" ); _updatePool(); uint256 pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; userInfo[msg.sender].amount -= amount; userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; stakedToken.safeTransfer(msg.sender, amount); if (pendingRewards > 0) { looksRareToken.safeTransfer(msg.sender, pendingRewards); } emit Withdraw(msg.sender, amount, pendingRewards); } /** * @notice Withdraw rewards (for admin) * @param amount amount to withdraw (in looksRareToken) * @dev Only callable by owner. */ function adminRewardWithdraw(uint256 amount) external onlyOwner { looksRareToken.safeTransfer(msg.sender, amount); emit AdminRewardWithdraw(amount); } /** * @notice Pause * It allows calling emergencyWithdraw */ function pause() external onlyOwner whenNotPaused { _pause(); } /** * @notice Unpause */ function unpause() external onlyOwner whenPaused { _unpause(); } /** * @notice Update reward per block and the end block * @param newRewardPerBlock the new reward per block * @param newEndBlock the new end block */ function updateRewardPerBlockAndEndBlock(uint256 newRewardPerBlock, uint256 newEndBlock) external onlyOwner { if (block.number >= START_BLOCK) { _updatePool(); } require(newEndBlock > block.number, "Owner: New endBlock must be after current block"); require(newEndBlock > START_BLOCK, "Owner: New endBlock must be after start block"); endBlock = newEndBlock; rewardPerBlock = newRewardPerBlock; emit NewRewardPerBlockAndEndBlock(newRewardPerBlock, newEndBlock); } /** * @notice View function to see pending reward on frontend. * @param user address of the user * @return Pending reward */ function calculatePendingRewards(address user) external view returns (uint256) { uint256 stakedTokenSupply = stakedToken.balanceOf(address(this)); if ((block.number > lastRewardBlock) && (stakedTokenSupply != 0)) { uint256 multiplier = _getMultiplier(lastRewardBlock, block.number); uint256 tokenReward = multiplier * rewardPerBlock; uint256 adjustedTokenPerShare = accTokenPerShare + (tokenReward * PRECISION_FACTOR) / stakedTokenSupply; return (userInfo[user].amount * adjustedTokenPerShare) / PRECISION_FACTOR - userInfo[user].rewardDebt; } else { return (userInfo[user].amount * accTokenPerShare) / PRECISION_FACTOR - userInfo[user].rewardDebt; } } /** * @notice Update reward variables of the pool to be up-to-date. */ function _updatePool() internal { if (block.number <= lastRewardBlock) { return; } uint256 stakedTokenSupply = stakedToken.balanceOf(address(this)); if (stakedTokenSupply == 0) { lastRewardBlock = block.number; return; } uint256 multiplier = _getMultiplier(lastRewardBlock, block.number); uint256 tokenReward = multiplier * rewardPerBlock; // Update only if token reward for staking is not null if (tokenReward > 0) { accTokenPerShare = accTokenPerShare + ((tokenReward * PRECISION_FACTOR) / stakedTokenSupply); } // Update last reward block only if it wasn't updated after or at the end block if (lastRewardBlock <= endBlock) { lastRewardBlock = block.number; } } /** * @notice Return reward multiplier over the given "from" to "to" block. * @param from block to start calculating reward * @param to block to finish calculating reward * @return the multiplier for the period */ function _getMultiplier(uint256 from, uint256 to) internal view returns (uint256) { if (to <= endBlock) { return to - from; } else if (from >= endBlock) { return 0; } else { return endBlock - from; } } }
// 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/Pausable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!paused(), "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(paused(), "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (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 (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 pragma solidity ^0.8.0; import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {ILooksRareToken} from "../interfaces/ILooksRareToken.sol"; /** * @title TokenDistributor * @notice It handles the distribution of LOOKS token. * It auto-adjusts block rewards over a set number of periods. */ contract TokenDistributor is ReentrancyGuard { using SafeERC20 for IERC20; using SafeERC20 for ILooksRareToken; struct StakingPeriod { uint256 rewardPerBlockForStaking; uint256 rewardPerBlockForOthers; uint256 periodLengthInBlock; } struct UserInfo { uint256 amount; // Amount of staked tokens provided by user uint256 rewardDebt; // Reward debt } // Precision factor for calculating rewards uint256 public constant PRECISION_FACTOR = 10**12; ILooksRareToken public immutable looksRareToken; address public immutable tokenSplitter; // Number of reward periods uint256 public immutable NUMBER_PERIODS; // Block number when rewards start uint256 public immutable START_BLOCK; // Accumulated tokens per share uint256 public accTokenPerShare; // Current phase for rewards uint256 public currentPhase; // Block number when rewards end uint256 public endBlock; // Block number of the last update uint256 public lastRewardBlock; // Tokens distributed per block for other purposes (team + treasury + trading rewards) uint256 public rewardPerBlockForOthers; // Tokens distributed per block for staking uint256 public rewardPerBlockForStaking; // Total amount staked uint256 public totalAmountStaked; mapping(uint256 => StakingPeriod) public stakingPeriod; mapping(address => UserInfo) public userInfo; event Compound(address indexed user, uint256 harvestedAmount); event Deposit(address indexed user, uint256 amount, uint256 harvestedAmount); event NewRewardsPerBlock( uint256 indexed currentPhase, uint256 startBlock, uint256 rewardPerBlockForStaking, uint256 rewardPerBlockForOthers ); event Withdraw(address indexed user, uint256 amount, uint256 harvestedAmount); /** * @notice Constructor * @param _looksRareToken LOOKS token address * @param _tokenSplitter token splitter contract address (for team and trading rewards) * @param _startBlock start block for reward program * @param _rewardsPerBlockForStaking array of rewards per block for staking * @param _rewardsPerBlockForOthers array of rewards per block for other purposes (team + treasury + trading rewards) * @param _periodLengthesInBlocks array of period lengthes * @param _numberPeriods number of periods with different rewards/lengthes (e.g., if 3 changes --> 4 periods) */ constructor( address _looksRareToken, address _tokenSplitter, uint256 _startBlock, uint256[] memory _rewardsPerBlockForStaking, uint256[] memory _rewardsPerBlockForOthers, uint256[] memory _periodLengthesInBlocks, uint256 _numberPeriods ) { require( (_periodLengthesInBlocks.length == _numberPeriods) && (_rewardsPerBlockForStaking.length == _numberPeriods) && (_rewardsPerBlockForStaking.length == _numberPeriods), "Distributor: Lengthes must match numberPeriods" ); // 1. Operational checks for supply uint256 nonCirculatingSupply = ILooksRareToken(_looksRareToken).SUPPLY_CAP() - ILooksRareToken(_looksRareToken).totalSupply(); uint256 amountTokensToBeMinted; for (uint256 i = 0; i < _numberPeriods; i++) { amountTokensToBeMinted += (_rewardsPerBlockForStaking[i] * _periodLengthesInBlocks[i]) + (_rewardsPerBlockForOthers[i] * _periodLengthesInBlocks[i]); stakingPeriod[i] = StakingPeriod({ rewardPerBlockForStaking: _rewardsPerBlockForStaking[i], rewardPerBlockForOthers: _rewardsPerBlockForOthers[i], periodLengthInBlock: _periodLengthesInBlocks[i] }); } require(amountTokensToBeMinted == nonCirculatingSupply, "Distributor: Wrong reward parameters"); // 2. Store values looksRareToken = ILooksRareToken(_looksRareToken); tokenSplitter = _tokenSplitter; rewardPerBlockForStaking = _rewardsPerBlockForStaking[0]; rewardPerBlockForOthers = _rewardsPerBlockForOthers[0]; START_BLOCK = _startBlock; endBlock = _startBlock + _periodLengthesInBlocks[0]; NUMBER_PERIODS = _numberPeriods; // Set the lastRewardBlock as the startBlock lastRewardBlock = _startBlock; } /** * @notice Deposit staked tokens and compounds pending rewards * @param amount amount to deposit (in LOOKS) */ function deposit(uint256 amount) external nonReentrant { require(amount > 0, "Deposit: Amount must be > 0"); // Update pool information _updatePool(); // Transfer LOOKS tokens to this contract looksRareToken.safeTransferFrom(msg.sender, address(this), amount); uint256 pendingRewards; // If not new deposit, calculate pending rewards (for auto-compounding) if (userInfo[msg.sender].amount > 0) { pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; } // Adjust user information userInfo[msg.sender].amount += (amount + pendingRewards); userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; // Increase totalAmountStaked totalAmountStaked += (amount + pendingRewards); emit Deposit(msg.sender, amount, pendingRewards); } /** * @notice Compound based on pending rewards */ function harvestAndCompound() external nonReentrant { // Update pool information _updatePool(); // Calculate pending rewards uint256 pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; // Return if no pending rewards if (pendingRewards == 0) { // It doesn't throw revertion (to help with the fee-sharing auto-compounding contract) return; } // Adjust user amount for pending rewards userInfo[msg.sender].amount += pendingRewards; // Adjust totalAmountStaked totalAmountStaked += pendingRewards; // Recalculate reward debt based on new user amount userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; emit Compound(msg.sender, pendingRewards); } /** * @notice Update pool rewards */ function updatePool() external nonReentrant { _updatePool(); } /** * @notice Withdraw staked tokens and compound pending rewards * @param amount amount to withdraw */ function withdraw(uint256 amount) external nonReentrant { require( (userInfo[msg.sender].amount >= amount) && (amount > 0), "Withdraw: Amount must be > 0 or lower than user balance" ); // Update pool _updatePool(); // Calculate pending rewards uint256 pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; // Adjust user information userInfo[msg.sender].amount = userInfo[msg.sender].amount + pendingRewards - amount; userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; // Adjust total amount staked totalAmountStaked = totalAmountStaked + pendingRewards - amount; // Transfer LOOKS tokens to the sender looksRareToken.safeTransfer(msg.sender, amount); emit Withdraw(msg.sender, amount, pendingRewards); } /** * @notice Withdraw all staked tokens and collect tokens */ function withdrawAll() external nonReentrant { require(userInfo[msg.sender].amount > 0, "Withdraw: Amount must be > 0"); // Update pool _updatePool(); // Calculate pending rewards and amount to transfer (to the sender) uint256 pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; uint256 amountToTransfer = userInfo[msg.sender].amount + pendingRewards; // Adjust total amount staked totalAmountStaked = totalAmountStaked - userInfo[msg.sender].amount; // Adjust user information userInfo[msg.sender].amount = 0; userInfo[msg.sender].rewardDebt = 0; // Transfer LOOKS tokens to the sender looksRareToken.safeTransfer(msg.sender, amountToTransfer); emit Withdraw(msg.sender, amountToTransfer, pendingRewards); } /** * @notice Calculate pending rewards for a user * @param user address of the user * @return Pending rewards */ function calculatePendingRewards(address user) external view returns (uint256) { if ((block.number > lastRewardBlock) && (totalAmountStaked != 0)) { uint256 multiplier = _getMultiplier(lastRewardBlock, block.number); uint256 tokenRewardForStaking = multiplier * rewardPerBlockForStaking; uint256 adjustedEndBlock = endBlock; uint256 adjustedCurrentPhase = currentPhase; // Check whether to adjust multipliers and reward per block while ((block.number > adjustedEndBlock) && (adjustedCurrentPhase < (NUMBER_PERIODS - 1))) { // Update current phase adjustedCurrentPhase++; // Update rewards per block uint256 adjustedRewardPerBlockForStaking = stakingPeriod[adjustedCurrentPhase].rewardPerBlockForStaking; // Calculate adjusted block number uint256 previousEndBlock = adjustedEndBlock; // Update end block adjustedEndBlock = previousEndBlock + stakingPeriod[adjustedCurrentPhase].periodLengthInBlock; // Calculate new multiplier uint256 newMultiplier = (block.number <= adjustedEndBlock) ? (block.number - previousEndBlock) : stakingPeriod[adjustedCurrentPhase].periodLengthInBlock; // Adjust token rewards for staking tokenRewardForStaking += (newMultiplier * adjustedRewardPerBlockForStaking); } uint256 adjustedTokenPerShare = accTokenPerShare + (tokenRewardForStaking * PRECISION_FACTOR) / totalAmountStaked; return (userInfo[user].amount * adjustedTokenPerShare) / PRECISION_FACTOR - userInfo[user].rewardDebt; } else { return (userInfo[user].amount * accTokenPerShare) / PRECISION_FACTOR - userInfo[user].rewardDebt; } } /** * @notice Update reward variables of the pool */ function _updatePool() internal { if (block.number <= lastRewardBlock) { return; } if (totalAmountStaked == 0) { lastRewardBlock = block.number; return; } // Calculate multiplier uint256 multiplier = _getMultiplier(lastRewardBlock, block.number); // Calculate rewards for staking and others uint256 tokenRewardForStaking = multiplier * rewardPerBlockForStaking; uint256 tokenRewardForOthers = multiplier * rewardPerBlockForOthers; // Check whether to adjust multipliers and reward per block while ((block.number > endBlock) && (currentPhase < (NUMBER_PERIODS - 1))) { // Update rewards per block _updateRewardsPerBlock(endBlock); uint256 previousEndBlock = endBlock; // Adjust the end block endBlock += stakingPeriod[currentPhase].periodLengthInBlock; // Adjust multiplier to cover the missing periods with other lower inflation schedule uint256 newMultiplier = _getMultiplier(previousEndBlock, block.number); // Adjust token rewards tokenRewardForStaking += (newMultiplier * rewardPerBlockForStaking); tokenRewardForOthers += (newMultiplier * rewardPerBlockForOthers); } // Mint tokens only if token rewards for staking are not null if (tokenRewardForStaking > 0) { // It allows protection against potential issues to prevent funds from being locked bool mintStatus = looksRareToken.mint(address(this), tokenRewardForStaking); if (mintStatus) { accTokenPerShare = accTokenPerShare + ((tokenRewardForStaking * PRECISION_FACTOR) / totalAmountStaked); } looksRareToken.mint(tokenSplitter, tokenRewardForOthers); } // Update last reward block only if it wasn't updated after or at the end block if (lastRewardBlock <= endBlock) { lastRewardBlock = block.number; } } /** * @notice Update rewards per block * @dev Rewards are halved by 2 (for staking + others) */ function _updateRewardsPerBlock(uint256 _newStartBlock) internal { // Update current phase currentPhase++; // Update rewards per block rewardPerBlockForStaking = stakingPeriod[currentPhase].rewardPerBlockForStaking; rewardPerBlockForOthers = stakingPeriod[currentPhase].rewardPerBlockForOthers; emit NewRewardsPerBlock(currentPhase, _newStartBlock, rewardPerBlockForStaking, rewardPerBlockForOthers); } /** * @notice Return reward multiplier over the given "from" to "to" block. * @param from block to start calculating reward * @param to block to finish calculating reward * @return the multiplier for the period */ function _getMultiplier(uint256 from, uint256 to) internal view returns (uint256) { if (to <= endBlock) { return to - from; } else if (from >= endBlock) { return 0; } else { return endBlock - from; } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; /** * @title TokenSplitter * @notice It splits LOOKS to team/treasury/trading volume reward accounts based on shares. */ contract TokenSplitter is Ownable, ReentrancyGuard { using SafeERC20 for IERC20; struct AccountInfo { uint256 shares; uint256 tokensDistributedToAccount; } uint256 public immutable TOTAL_SHARES; IERC20 public immutable looksRareToken; // Total LOOKS tokens distributed across all accounts uint256 public totalTokensDistributed; mapping(address => AccountInfo) public accountInfo; event NewSharesOwner(address indexed oldRecipient, address indexed newRecipient); event TokensTransferred(address indexed account, uint256 amount); /** * @notice Constructor * @param _accounts array of accounts addresses * @param _shares array of shares per account * @param _looksRareToken address of the LOOKS token */ constructor( address[] memory _accounts, uint256[] memory _shares, address _looksRareToken ) { require(_accounts.length == _shares.length, "Splitter: Length differ"); require(_accounts.length > 0, "Splitter: Length must be > 0"); uint256 currentShares; for (uint256 i = 0; i < _accounts.length; i++) { require(_shares[i] > 0, "Splitter: Shares are 0"); currentShares += _shares[i]; accountInfo[_accounts[i]].shares = _shares[i]; } TOTAL_SHARES = currentShares; looksRareToken = IERC20(_looksRareToken); } /** * @notice Release LOOKS tokens to the account * @param account address of the account */ function releaseTokens(address account) external nonReentrant { require(accountInfo[account].shares > 0, "Splitter: Account has no share"); // Calculate amount to transfer to the account uint256 totalTokensReceived = looksRareToken.balanceOf(address(this)) + totalTokensDistributed; uint256 pendingRewards = ((totalTokensReceived * accountInfo[account].shares) / TOTAL_SHARES) - accountInfo[account].tokensDistributedToAccount; // Revert if equal to 0 require(pendingRewards != 0, "Splitter: Nothing to transfer"); accountInfo[account].tokensDistributedToAccount += pendingRewards; totalTokensDistributed += pendingRewards; // Transfer funds to account looksRareToken.safeTransfer(account, pendingRewards); emit TokensTransferred(account, pendingRewards); } /** * @notice Update share recipient * @param _newRecipient address of the new recipient * @param _currentRecipient address of the current recipient */ function updateSharesOwner(address _newRecipient, address _currentRecipient) external onlyOwner { require(accountInfo[_currentRecipient].shares > 0, "Owner: Current recipient has no shares"); require(accountInfo[_newRecipient].shares == 0, "Owner: New recipient has existing shares"); // Copy shares to new recipient accountInfo[_newRecipient].shares = accountInfo[_currentRecipient].shares; accountInfo[_newRecipient].tokensDistributedToAccount = accountInfo[_currentRecipient] .tokensDistributedToAccount; // Reset existing shares accountInfo[_currentRecipient].shares = 0; accountInfo[_currentRecipient].tokensDistributedToAccount = 0; emit NewSharesOwner(_currentRecipient, _newRecipient); } /** * @notice Retrieve amount of LOOKS tokens that can be transferred * @param account address of the account */ function calculatePendingRewards(address account) external view returns (uint256) { if (accountInfo[account].shares == 0) { return 0; } uint256 totalTokensReceived = looksRareToken.balanceOf(address(this)) + totalTokensDistributed; uint256 pendingRewards = ((totalTokensReceived * accountInfo[account].shares) / TOTAL_SHARES) - accountInfo[account].tokensDistributedToAccount; return pendingRewards; } }
// 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/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 (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 pragma solidity ^0.8.0; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; interface ILooksRareToken is IERC20 { function SUPPLY_CAP() external view returns (uint256); function mint(address account, uint256 amount) external returns (bool); }
{ "optimizer": { "enabled": true, "runs": 888888 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newRewardPerBlock","type":"uint256"},{"internalType":"uint256","name":"newEndBlock","type":"uint256"}],"name":"updateRewardPerBlockAndEndBlock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"rewardDebt","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000dc00ba87cc2d99468f7f34bc04cbf72e111a32f7000000000000000000000000f4d2888d29d722226fafa5d9b24f9164c092421e0000000000000000000000000000000000000000000000008ac7230489e800000000000000000000000000000000000000000000000000000000000000d545b400000000000000000000000000000000000000000000000000000000011cc75e
-----Decoded View---------------
Arg [0] : _stakedToken (address): 0xDC00bA87Cc2D99468f7f34BC04CBf72E111A32f7
Arg [1] : _looksRareToken (address): 0xf4d2888d29D722226FafA5d9B24F9164c092421E
Arg [2] : _rewardPerBlock (uint256): 10000000000000000000
Arg [3] : _startBlock (uint256): 13977012
Arg [4] : _endBlock (uint256): 18663262
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000dc00ba87cc2d99468f7f34bc04cbf72e111a32f7
Arg [1] : 000000000000000000000000f4d2888d29d722226fafa5d9b24f9164c092421e
Arg [2] : 0000000000000000000000000000000000000000000000008ac7230489e80000
Arg [3] : 0000000000000000000000000000000000000000000000000000000000d545b4
Arg [4] : 00000000000000000000000000000000000000000000000000000000011cc75e
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ETH | 100.00% | $0.052488 | 2,794.4347 | $146.67 |
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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.