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Contract Name:
Staker
Compiler Version
v0.8.21+commit.d9974bed
Optimization Enabled:
Yes with 300 runs
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import { Ownable2Step } from "@openzeppelin/contracts/access/Ownable2Step.sol"; import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; import { Pausable } from "@openzeppelin/contracts/utils/Pausable.sol"; import { ReentrancyGuard } from "@openzeppelin/contracts/utils/ReentrancyGuard.sol"; import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import { IStaker } from "./interfaces/IStaker.sol"; /** * @title Staker * @notice Staker is a contract responsible for distributing rewards in the form of jPoints to early users * of the Jigsaw protocol. * @notice This contract accepts wstETH tokens as `tokenIn` and distributes rewards in jPoints accordingly. * @notice It is not intended for direct use; interaction should be done through the `stakingManager` contract. * * @dev This contract inherits functionalities from `Ownable2Step`, `Pausable`, and `ReentrancyGuard`. * * @author Hovooo (@hovooo) */ contract Staker is IStaker, Ownable2Step, Pausable, ReentrancyGuard { using SafeERC20 for IERC20; /** * @notice Address of the staking token. */ address public immutable override tokenIn; /** * @notice Address of the reward token. */ address public immutable override rewardToken; /** * @notice Address of the staking manager. */ address public immutable override stakingManager; /** * @notice Timestamp indicating when the current reward distribution ends. */ uint256 public override periodFinish = 0; /** * @notice Rate of rewards per second. */ uint256 public override rewardRate = 0; /** * @notice Duration of current reward period. */ uint256 public override rewardsDuration; /** * @notice Timestamp of the last update time. */ uint256 public override lastUpdateTime; /** * @notice Stored rewards per token. */ uint256 public override rewardPerTokenStored; /** * @notice Mapping of user addresses to the amount of rewards already paid to them. */ mapping(address => uint256) public override userRewardPerTokenPaid; /** * @notice Mapping of user addresses to their accrued rewards. */ mapping(address => uint256) public override rewards; /** * @notice Total supply limit of the staking token. */ uint256 public constant totalSupplyLimit = 1e34; uint256 private _totalSupply; mapping(address => uint256) private _balances; // --- Modifiers --- /** * @notice Modifier to update the reward for a specified account. * @param account The account for which the reward needs to be updated. */ modifier updateReward(address account) { rewardPerTokenStored = rewardPerToken(); lastUpdateTime = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account] = earned(account); userRewardPerTokenPaid[account] = rewardPerTokenStored; } _; } /** * @notice Modifier to check if the provided address is valid. * @param _address to be checked for validity. */ modifier validAddress(address _address) { if (_address == address(0)) revert InvalidAddress(); _; } /** * @notice Modifier to check if the provided amount is valid. * @param _amount to be checked for validity. */ modifier validAmount(uint256 _amount) { if (_amount == 0) revert InvalidAmount(); _; } /** * @notice Modifier to restrict a function to be called only by the staking manager. * @notice Reverts the transaction if the caller is not the staking manager. */ modifier onlyStakingManager() { if (msg.sender != stakingManager) revert UnauthorizedCaller(); _; } // --- Constructor --- /** * @notice Constructor function for initializing the Staker contract. * * @param _initialOwner The initial owner of the contract * @param _tokenIn The address of the token to be staked * @param _rewardToken The address of the reward token * @param _stakingManager The address of the staking manager contract * @param _rewardsDuration The duration of the rewards period, in seconds */ constructor( address _initialOwner, address _tokenIn, address _rewardToken, address _stakingManager, uint256 _rewardsDuration ) Ownable(_initialOwner) validAddress(_tokenIn) validAddress(_rewardToken) validAddress(_stakingManager) validAmount(_rewardsDuration) { tokenIn = _tokenIn; rewardToken = _rewardToken; stakingManager = _stakingManager; rewardsDuration = _rewardsDuration; periodFinish = block.timestamp + rewardsDuration; } // -- Staker's operations -- /** * @notice Performs a deposit operation for `_user`. * @dev Updates participants' rewards. * * @param _user to deposit for. * @param _amount to deposit. */ function deposit( address _user, uint256 _amount ) external override onlyStakingManager whenNotPaused nonReentrant updateReward(_user) validAmount(_amount) { uint256 rewardBalance = IERC20(rewardToken).balanceOf(address(this)); if (rewardBalance == 0) revert NoRewardsToDistribute(); // Ensure that deposit operation will never surpass supply limit if (_totalSupply + _amount > totalSupplyLimit) revert DepositSurpassesSupplyLimit(_amount, totalSupplyLimit); _totalSupply += _amount; _balances[_user] += _amount; emit Staked(_user, _amount); } /** * @notice Withdraws specified `_amount` and claims rewards for the `_user`. * @dev This function enables the caller to exit the investment and claim their rewards. * * @param _user to withdraw and claim for. * @param _to address to which funds will be sent. */ function exit(address _user, address _to) external override onlyStakingManager { withdraw(_user, _balances[_user]); if (rewards[_user] > 0) { claimRewards(_user, _to); } } /** * @notice Withdraws investment from staking. * @dev Updates participants' rewards. * * @param _user to withdraw for. * @param _amount to withdraw. */ function withdraw( address _user, uint256 _amount ) internal whenNotPaused nonReentrant updateReward(_user) validAmount(_amount) { _totalSupply -= _amount; _balances[_user] = _balances[_user] - _amount; emit Withdrawn(_user, _amount); } /** * @notice Claims the rewards for the caller. * @dev This function allows the caller to claim their earned rewards. * * @param _user to claim rewards for. * @param _to address to which rewards will be sent. */ function claimRewards(address _user, address _to) internal nonReentrant updateReward(_user) { uint256 reward = rewards[_user]; if (reward == 0) revert NothingToClaim(); rewards[_user] = 0; emit RewardPaid(_user, reward); IERC20(rewardToken).safeTransfer(_to, reward); } // -- Administration -- /** * @notice Sets the duration of each reward period. * @param _rewardsDuration The new rewards duration. */ function setRewardsDuration(uint256 _rewardsDuration) external override onlyOwner { if (block.timestamp <= periodFinish) revert PreviousPeriodNotFinished(block.timestamp, periodFinish); emit RewardsDurationUpdated(rewardsDuration, _rewardsDuration); rewardsDuration = _rewardsDuration; } /** * @notice Adds more rewards to the contract. * * @dev Prior approval is required for this contract to transfer rewards from `_from` address. * * @param _from address to transfer rewards from. * @param _amount The amount of new rewards. */ function addRewards( address _from, uint256 _amount ) external override onlyOwner validAmount(_amount) updateReward(address(0)) { // Transfer assets from the user's wallet to this contract. IERC20(rewardToken).safeTransferFrom({ from: _from, to: address(this), value: _amount }); uint256 duration = rewardsDuration; if (duration == 0) revert ZeroRewardsDuration(); if (block.timestamp >= periodFinish) { rewardRate = _amount / duration; } else { uint256 remaining = periodFinish - block.timestamp; uint256 leftover = remaining * rewardRate; rewardRate = (_amount + leftover) / duration; } if (rewardRate == 0) revert RewardAmountTooSmall(); uint256 balance = IERC20(rewardToken).balanceOf(address(this)); if (rewardRate > (balance / duration)) revert RewardRateTooBig(); lastUpdateTime = block.timestamp; periodFinish = block.timestamp + duration; emit RewardAdded(_amount); } /** * @notice Triggers stopped state. */ function pause() external override onlyOwner whenNotPaused { _pause(); } /** * @notice Returns to normal state. */ function unpause() external override onlyOwner whenPaused { _unpause(); } /** * @notice Renounce ownership override to prevent accidental loss of contract ownership. * @dev This function ensures that the contract's ownership cannot be lost unintentionally. */ function renounceOwnership() public pure override { revert RenouncingOwnershipProhibited(); } // -- Getters -- /** * @notice Returns the total supply of the staking token. */ function totalSupply() external view override returns (uint256) { return _totalSupply; } /** * @notice Returns the total invested amount for an account. * @param _account The participant's address. */ function balanceOf(address _account) external view override returns (uint256) { return _balances[_account]; } /** * @notice Returns the last time rewards were applicable. */ function lastTimeRewardApplicable() public view override returns (uint256) { return block.timestamp < periodFinish ? block.timestamp : periodFinish; } /** * @notice Returns rewards per token. */ function rewardPerToken() public view override returns (uint256) { if (_totalSupply == 0) { return rewardPerTokenStored; } return rewardPerTokenStored + (((lastTimeRewardApplicable() - lastUpdateTime) * rewardRate * 1e18) / _totalSupply); } /** * @notice Returns accrued rewards for an account. * @param _account The participant's address. */ function earned(address _account) public view override returns (uint256) { return ((_balances[_account] * (rewardPerToken() - userRewardPerTokenPaid[_account])) / 1e18) + rewards[_account]; } /** * @notice Returns the reward amount for a specific time range. */ function getRewardForDuration() external view override returns (uint256) { return rewardRate * rewardsDuration; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable2Step.sol) pragma solidity ^0.8.20; import {Ownable} from "./Ownable.sol"; /** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is specified at deployment time in the constructor for `Ownable`. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */ abstract contract Ownable2Step is Ownable { address private _pendingOwner; event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { return _pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual override onlyOwner { _pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { delete _pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() public virtual { address sender = _msgSender(); if (pendingOwner() != sender) { revert OwnableUnauthorizedAccount(sender); } _transferOwnership(sender); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) pragma solidity ^0.8.20; import {Context} from "../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. * * The initial owner is set to the address provided by the deployer. 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; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling 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 { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol) pragma solidity ^0.8.20; import {Context} from "../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 { bool private _paused; /** * @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); /** * @dev The operation failed because the contract is paused. */ error EnforcedPause(); /** * @dev The operation failed because the contract is not paused. */ error ExpectedPause(); /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { if (paused()) { revert EnforcedPause(); } } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { if (!paused()) { revert ExpectedPause(); } } /** * @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 (last updated v5.0.0) (utils/ReentrancyGuard.sol) pragma solidity ^0.8.20; /** * @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; /** * @dev Unauthorized reentrant call. */ error ReentrancyGuardReentrantCall(); 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() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be NOT_ENTERED if (_status == ENTERED) { revert ReentrancyGuardReentrantCall(); } // Any calls to nonReentrant after this point will fail _status = ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; import {IERC20Permit} from "../extensions/IERC20Permit.sol"; import {Address} from "../../../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; /** * @dev An operation with an ERC20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value))); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value))); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @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); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @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). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // 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 cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 value) 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 a `value` amount of tokens 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 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 value) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; /// @title Interface for Staker contract interface IStaker { // --- Errors --- /** * @notice The operation failed because provided address is invalid. */ error InvalidAddress(); /** * @notice The operation failed because provided amount is invalid. */ error InvalidAmount(); /** * @notice The operation failed because caller was unauthorized for the action. */ error UnauthorizedCaller(); /** * @notice The operation failed because the previous rewards period must end first. * @param timestamp The current timestamp when the error occurred. * @param periodFinish The timestamp when the current rewards period is expected to end. */ error PreviousPeriodNotFinished(uint256 timestamp, uint256 periodFinish); /** * @notice The operation failed because rewards duration is zero. */ error ZeroRewardsDuration(); /** * @notice The operation failed because reward rate was zero. * Caused by an insufficient amount of rewards provided. */ error RewardAmountTooSmall(); /** * @notice The operation failed because reward rate is too big. */ error RewardRateTooBig(); /** * @notice The operation failed because there were no rewards to distribute. */ error NoRewardsToDistribute(); /** * @notice The operation failed because deposit surpasses the supply limit. * @param _amount of tokens attempting to be deposited. * @param supplyLimit allowed for deposits. */ error DepositSurpassesSupplyLimit(uint256 _amount, uint256 supplyLimit); /** * @notice The operation failed because user doesn't have rewards to claim. */ error NothingToClaim(); /** * @notice The operation failed because renouncing ownership is prohibited. */ error RenouncingOwnershipProhibited(); // --- Events --- /** * @notice Event emitted when the rewards duration is updated. * @param oldDuration The previous rewards duration. * @param newDuration The new rewards duration. */ event RewardsDurationUpdated(uint256 indexed oldDuration, uint256 indexed newDuration); /** * @notice Event emitted when new rewards are added. * @param reward The amount of rewards added. */ event RewardAdded(uint256 indexed reward); /** * @notice Event emitted when a participant deposits an amount. * @param user The address of the participant who made the deposit. * @param amount The amount that was deposited. */ event Staked(address indexed user, uint256 indexed amount); /** * @notice Event emitted when a participant withdraws their stake. * @param user The address of the participant who withdrew their stake. * @param amount The amount that was withdrawn. */ event Withdrawn(address indexed user, uint256 indexed amount); /** * @notice Event emitted when a participant claims their rewards. * @param user The address of the participant who claimed the rewards. * @param reward The amount of rewards that were claimed. */ event RewardPaid(address indexed user, uint256 indexed reward); /** * @notice returns staking token address. */ function tokenIn() external view returns (address); /** * @notice returns reward token address. */ function rewardToken() external view returns (address); /** * @notice returns stakingManager address. */ function stakingManager() external view returns (address); /** * @notice when current contract distribution ends (block timestamp + rewards duration). */ function periodFinish() external view returns (uint256); /** * @notice rewards per second. */ function rewardRate() external view returns (uint256); /** * @notice reward period. */ function rewardsDuration() external view returns (uint256); /** * @notice last reward update timestamp. */ function lastUpdateTime() external view returns (uint256); /** * @notice reward-token share. */ function rewardPerTokenStored() external view returns (uint256); /** * @notice rewards paid to participants so far. */ function userRewardPerTokenPaid(address participant) external view returns (uint256); /** * @notice accrued rewards per participant. */ function rewards(address participant) external view returns (uint256); /** * @notice sets the new rewards duration. */ function setRewardsDuration(uint256 _rewardsDuration) external; /** * @notice Adds more rewards to the contract. * * @dev Prior approval is required for this contract to transfer rewards from `_from` address. * * @param _from address to transfer rewards from. * @param _amount The amount of new rewards. */ function addRewards(address _from, uint256 _amount) external; /** * @notice Triggers stopped state. */ function pause() external; /** * @notice Returns to normal state. */ function unpause() external; /** * @notice returns the total tokenIn supply. */ function totalSupply() external view returns (uint256); /** * @notice returns total invested amount for an account. * @param _account participant address */ function balanceOf(address _account) external view returns (uint256); /** * @notice returns the last time rewards were applicable. */ function lastTimeRewardApplicable() external view returns (uint256); /** * @notice returns rewards per tokenIn. */ function rewardPerToken() external view returns (uint256); /** * @notice rewards accrued rewards for account. * @param _account participant's address */ function earned(address _account) external view returns (uint256); /** * @notice returns reward amount for a specific time range. */ function getRewardForDuration() external view returns (uint256); /** * @notice Performs a deposit operation for `_user`. * @dev Updates participants' rewards. * * @param _user to deposit for. * @param _amount to deposit. */ function deposit(address _user, uint256 _amount) external; /** * @notice Withdraws specified `_amount` and claims rewards for the `_user`. * @dev This function enables the caller to exit the investment and claim their rewards. * * @param _user to withdraw and claim for. * @param _to address to which funds will be sent. */ function exit(address _user, address _to) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @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; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. * * CAUTION: See Security Considerations above. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol) pragma solidity ^0.8.20; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @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://consensys.net/diligence/blog/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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @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 or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * 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. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @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`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) private pure { // 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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert FailedInnerCall(); } } }
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Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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nonpayable","type":"function"},{"inputs":[],"name":"getRewardForDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastTimeRewardApplicable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastUpdateTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"periodFinish","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"rewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardPerTokenStored","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rewardsDuration","type":"uint256"}],"name":"setRewardsDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakingManager","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenIn","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupplyLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"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":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","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)
00000000000000000000000023fd89fda78ec3cc436351599a7b12d48fe8fbce0000000000000000000000007f39c581f595b53c5cb19bd0b3f8da6c935e2ca0000000000000000000000000401ea2886d8c9e75ea5a47684d3f96082674fe4f0000000000000000000000000bed6f2fcb52ae6cd00988ab9e27609207a6cfe400000000000000000000000000000000000000000000000000000000003ca500
-----Decoded View---------------
Arg [0] : _initialOwner (address): 0x23fd89fDA78Ec3Cc436351599A7b12D48fE8FBcE
Arg [1] : _tokenIn (address): 0x7f39C581F595B53c5cb19bD0b3f8dA6c935E2Ca0
Arg [2] : _rewardToken (address): 0x401Ea2886D8C9e75EA5a47684d3F96082674fe4f
Arg [3] : _stakingManager (address): 0x0bED6f2fCb52ae6cD00988Ab9e27609207a6cFe4
Arg [4] : _rewardsDuration (uint256): 3974400
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 00000000000000000000000023fd89fda78ec3cc436351599a7b12d48fe8fbce
Arg [1] : 0000000000000000000000007f39c581f595b53c5cb19bd0b3f8da6c935e2ca0
Arg [2] : 000000000000000000000000401ea2886d8c9e75ea5a47684d3f96082674fe4f
Arg [3] : 0000000000000000000000000bed6f2fcb52ae6cd00988ab9e27609207a6cfe4
Arg [4] : 00000000000000000000000000000000000000000000000000000000003ca500
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.