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0x71218d9e...AE4E9c736 at txn 0xb40c76d24316a801610e08a8ac917b3cdd17478fc189a71a1919c47056686019
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Transaction Hash | Method | Block | From | To | Value | ||||
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0xfb19e98011449ec84a189fb3fc05cf073753d0847a2d642e2848c54d037a7658 | Stake | 19940753 | 2 days ago |
| IN | 0xE3071e87...D67Aa6fc8 | 0 ETH | 0.00317142 | |
0x4e0f54c64ad81295967274b5a8b6df95f8aa0aa78993f800ee2269bb86352851 | Stake | 19940707 | 2 days ago |
| IN | 0xE3071e87...D67Aa6fc8 | 0 ETH | 0.00650353 | |
0xc2d0e810c682b52aec3e1b8687bea9a706f37099b6e0736edb561d38c521205a | Set Admin | 19940563 | 2 days ago | 0x71218d9e...AE4E9c736 | IN | 0xE3071e87...D67Aa6fc8 | 0 ETH | 0.00047255 | |
0xd31c4bc43c244a0e70c861ff4b5ffb160a75041466c3f3969366d87af9732e0f | Set Reward Notif... | 19940562 | 2 days ago | 0x71218d9e...AE4E9c736 | IN | 0xE3071e87...D67Aa6fc8 | 0 ETH | 0.0006995 | |
0xb40c76d24316a801610e08a8ac917b3cdd17478fc189a71a1919c47056686019 | 0x6101a060 | 19940562 | 2 days ago | 0x71218d9e...AE4E9c736 | IN | Create: UniStaker | 0 ETH | 0.04958167 |
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0x4e0f54c64ad81295967274b5a8b6df95f8aa0aa78993f800ee2269bb86352851 | 19940707 | 2 days ago | 0xE3071e87...D67Aa6fc8 | Contract Creation | 0 ETH |
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Contract Name:
UniStaker
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v0.8.23+commit.f704f362
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Yes with 10000000 runs
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paris EvmVersion, GNU AGPLv3 license
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File 1 of 21 : UniStaker.sol
// SPDX-License-Identifier: AGPL-3.0-onlypragma solidity 0.8.23;import {DelegationSurrogate} from "src/DelegationSurrogate.sol";import {INotifiableRewardReceiver} from "src/interfaces/INotifiableRewardReceiver.sol";import {IERC20Delegates} from "src/interfaces/IERC20Delegates.sol";import {IERC20} from "openzeppelin/token/ERC20/IERC20.sol";import {SafeERC20} from "openzeppelin/token/ERC20/utils/SafeERC20.sol";import {Multicall} from "openzeppelin/utils/Multicall.sol";import {Nonces} from "openzeppelin/utils/Nonces.sol";import {SignatureChecker} from "openzeppelin/utils/cryptography/SignatureChecker.sol";import {EIP712} from "openzeppelin/utils/cryptography/EIP712.sol";/// @title UniStaker/// @author ScopeLift/// @notice This contract manages the distribution of rewards to stakers. Rewards are denominated/// in an ERC20 token and sent to the contract by authorized reward notifiers. To stake means to/// deposit a designated, delegable ERC20 governance token and leave it over a period of time./// The contract allows stakers to delegate the voting power of the tokens they stake to any/// governance delegatee on a per deposit basis. The contract also allows stakers to designate the/// beneficiary address that earns rewards for the associated deposit.////// The staking mechanism of this contract is directly inspired by the Synthetix StakingRewards.sol/// implementation. The core mechanic involves the streaming of rewards over a designated period/// of time. Each staker earns rewards proportional to their share of the total stake, and each/// staker earns only while their tokens are staked. Stakers may add or withdraw their stake at any/// point. Beneficiaries can claim the rewards they've earned at any point. When a new reward is/// received, the reward duration restarts, and the rate at which rewards are streamed is updated/// to include the newly received rewards along with any remaining rewards that have finished/// streaming since the last time a reward was received.contract UniStaker is INotifiableRewardReceiver, Multicall, EIP712, Nonces { type DepositIdentifier is uint256; /// @notice Emitted when stake is deposited by a depositor, either to a new deposit or one that /// already exists. event StakeDeposited( address owner, DepositIdentifier indexed depositId, uint256 amount, uint256 depositBalance ); /// @notice Emitted when a depositor withdraws some portion of stake from a given deposit. event StakeWithdrawn(DepositIdentifier indexed depositId, uint256 amount, uint256 depositBalance); /// @notice Emitted when a deposit's delegatee is changed. event DelegateeAltered( DepositIdentifier indexed depositId, address oldDelegatee, address newDelegatee ); /// @notice Emitted when a deposit's beneficiary is changed. event BeneficiaryAltered( DepositIdentifier indexed depositId, address indexed oldBeneficiary, address indexed newBeneficiary ); /// @notice Emitted when a beneficiary claims their earned reward. event RewardClaimed(address indexed beneficiary, uint256 amount); /// @notice Emitted when this contract is notified of a new reward. event RewardNotified(uint256 amount, address notifier); /// @notice Emitted when the admin address is set. event AdminSet(address indexed oldAdmin, address indexed newAdmin); /// @notice Emitted when a reward notifier address is enabled or disabled. event RewardNotifierSet(address indexed account, bool isEnabled); /// @notice Emitted when a surrogate contract is deployed. event SurrogateDeployed(address indexed delegatee, address indexed surrogate); /// @notice Thrown when an account attempts a call for which it lacks appropriate permission. /// @param reason Human readable code explaining why the call is unauthorized. /// @param caller The address that attempted the unauthorized call. error UniStaker__Unauthorized(bytes32 reason, address caller); /// @notice Thrown if the new rate after a reward notification would be zero. error UniStaker__InvalidRewardRate(); /// @notice Thrown if the following invariant is broken after a new reward: the contract should /// always have a reward balance sufficient to distribute at the reward rate across the reward /// duration. error UniStaker__InsufficientRewardBalance(); /// @notice Thrown if a caller attempts to specify address zero for certain designated addresses. error UniStaker__InvalidAddress(); /// @notice Thrown when an onBehalf method is called with a deadline that has expired. error UniStaker__ExpiredDeadline(); /// @notice Thrown if a caller supplies an invalid signature to a method that requires one. error UniStaker__InvalidSignature(); /// @notice Metadata associated with a discrete staking deposit. /// @param balance The deposit's staked balance. /// @param owner The owner of this deposit. /// @param delegatee The governance delegate who receives the voting weight for this deposit. /// @param beneficiary The address that accrues staking rewards earned by this deposit. struct Deposit { uint96 balance; address owner; address delegatee; address beneficiary; } /// @notice Type hash used when encoding data for `stakeOnBehalf` calls. bytes32 public constant STAKE_TYPEHASH = keccak256( "Stake(uint96 amount,address delegatee,address beneficiary,address depositor,uint256 nonce,uint256 deadline)" ); /// @notice Type hash used when encoding data for `stakeMoreOnBehalf` calls. bytes32 public constant STAKE_MORE_TYPEHASH = keccak256( "StakeMore(uint256 depositId,uint96 amount,address depositor,uint256 nonce,uint256 deadline)" ); /// @notice Type hash used when encoding data for `alterDelegateeOnBehalf` calls. bytes32 public constant ALTER_DELEGATEE_TYPEHASH = keccak256( "AlterDelegatee(uint256 depositId,address newDelegatee,address depositor,uint256 nonce,uint256 deadline)" ); /// @notice Type hash used when encoding data for `alterBeneficiaryOnBehalf` calls. bytes32 public constant ALTER_BENEFICIARY_TYPEHASH = keccak256( "AlterBeneficiary(uint256 depositId,address newBeneficiary,address depositor,uint256 nonce,uint256 deadline)" ); /// @notice Type hash used when encoding data for `withdrawOnBehalf` calls. bytes32 public constant WITHDRAW_TYPEHASH = keccak256( "Withdraw(uint256 depositId,uint96 amount,address depositor,uint256 nonce,uint256 deadline)" ); /// @notice Type hash used when encoding data for `claimRewardOnBehalf` calls. bytes32 public constant CLAIM_REWARD_TYPEHASH = keccak256("ClaimReward(address beneficiary,uint256 nonce,uint256 deadline)"); /// @notice ERC20 token in which rewards are denominated and distributed. IERC20 public immutable REWARD_TOKEN; /// @notice Delegable governance token which users stake to earn rewards. IERC20Delegates public immutable STAKE_TOKEN; /// @notice Length of time over which rewards sent to this contract are distributed to stakers. uint256 public constant REWARD_DURATION = 30 days; /// @notice Scale factor used in reward calculation math to reduce rounding errors caused by /// truncation during division. uint256 public constant SCALE_FACTOR = 1e36; /// @dev Unique identifier that will be used for the next deposit. DepositIdentifier private nextDepositId; /// @notice Permissioned actor that can enable/disable `rewardNotifier` addresses. address public admin; /// @notice Global amount currently staked across all deposits. uint256 public totalStaked; /// @notice Tracks the total staked by a depositor across all unique deposits. mapping(address depositor => uint256 amount) public depositorTotalStaked; /// @notice Tracks the total stake actively earning rewards for a given beneficiary account. mapping(address beneficiary => uint256 amount) public earningPower; /// @notice Stores the metadata associated with a given deposit. mapping(DepositIdentifier depositId => Deposit deposit) public deposits; /// @notice Maps the account of each governance delegate with the surrogate contract which holds /// the staked tokens from deposits which assign voting weight to said delegate. mapping(address delegatee => DelegationSurrogate surrogate) public surrogates; /// @notice Time at which rewards distribution will complete if there are no new rewards. uint256 public rewardEndTime; /// @notice Last time at which the global rewards accumulator was updated. uint256 public lastCheckpointTime; /// @notice Global rate at which rewards are currently being distributed to stakers, /// denominated in scaled reward tokens per second, using the SCALE_FACTOR. uint256 public scaledRewardRate; /// @notice Checkpoint value of the global reward per token accumulator. uint256 public rewardPerTokenAccumulatedCheckpoint; /// @notice Checkpoint of the reward per token accumulator on a per account basis. It represents /// the value of the global accumulator at the last time a given beneficiary's rewards were /// calculated and stored. The difference between the global value and this value can be /// used to calculate the interim rewards earned by given account. mapping(address account => uint256) public beneficiaryRewardPerTokenCheckpoint; /// @notice Checkpoint of the unclaimed rewards earned by a given beneficiary with the scale /// factor included. This value is stored any time an action is taken that specifically impacts /// the rate at which rewards are earned by a given beneficiary account. Total unclaimed rewards /// for an account are thus this value plus all rewards earned after this checkpoint was taken. /// This value is reset to zero when a beneficiary account claims their earned rewards. mapping(address account => uint256 amount) public scaledUnclaimedRewardCheckpoint; /// @notice Maps addresses to whether they are authorized to call `notifyRewardAmount`. mapping(address rewardNotifier => bool) public isRewardNotifier; /// @param _rewardToken ERC20 token in which rewards will be denominated. /// @param _stakeToken Delegable governance token which users will stake to earn rewards. /// @param _admin Address which will have permission to manage rewardNotifiers. constructor(IERC20 _rewardToken, IERC20Delegates _stakeToken, address _admin) EIP712("UniStaker", "1") { REWARD_TOKEN = _rewardToken; STAKE_TOKEN = _stakeToken; _setAdmin(_admin); } /// @notice Set the admin address. /// @param _newAdmin Address of the new admin. /// @dev Caller must be the current admin. function setAdmin(address _newAdmin) external { _revertIfNotAdmin(); _setAdmin(_newAdmin); } /// @notice Enables or disables a reward notifier address. /// @param _rewardNotifier Address of the reward notifier. /// @param _isEnabled `true` to enable the `_rewardNotifier`, or `false` to disable. /// @dev Caller must be the current admin. function setRewardNotifier(address _rewardNotifier, bool _isEnabled) external { _revertIfNotAdmin(); isRewardNotifier[_rewardNotifier] = _isEnabled; emit RewardNotifierSet(_rewardNotifier, _isEnabled); } /// @notice Timestamp representing the last time at which rewards have been distributed, which is /// either the current timestamp (because rewards are still actively being streamed) or the time /// at which the reward duration ended (because all rewards to date have already been streamed). /// @return Timestamp representing the last time at which rewards have been distributed. function lastTimeRewardDistributed() public view returns (uint256) { if (rewardEndTime <= block.timestamp) return rewardEndTime; else return block.timestamp; } /// @notice Live value of the global reward per token accumulator. It is the sum of the last /// checkpoint value with the live calculation of the value that has accumulated in the interim. /// This number should monotonically increase over time as more rewards are distributed. /// @return Live value of the global reward per token accumulator. function rewardPerTokenAccumulated() public view returns (uint256) { if (totalStaked == 0) return rewardPerTokenAccumulatedCheckpoint; return rewardPerTokenAccumulatedCheckpoint + (scaledRewardRate * (lastTimeRewardDistributed() - lastCheckpointTime)) / totalStaked; } /// @notice Live value of the unclaimed rewards earned by a given beneficiary account. It is the /// sum of the last checkpoint value of their unclaimed rewards with the live calculation of the /// rewards that have accumulated for this account in the interim. This value can only increase, /// until it is reset to zero once the beneficiary account claims their unearned rewards. /// /// Note that the contract tracks the unclaimed rewards internally with the scale factor /// included, in order to avoid the accrual of precision losses as users takes actions that /// cause rewards to be checkpointed. This external helper method is useful for integrations, and /// returns the value after it has been scaled down to the reward token's raw decimal amount. /// @return Live value of the unclaimed rewards earned by a given beneficiary account. function unclaimedReward(address _beneficiary) external view returns (uint256) { return _scaledUnclaimedReward(_beneficiary) / SCALE_FACTOR; } /// @notice Stake tokens to a new deposit. The caller must pre-approve the staking contract to /// spend at least the would-be staked amount of the token. /// @param _amount The amount of the staking token to stake. /// @param _delegatee The address to assign the governance voting weight of the staked tokens. /// @return _depositId The unique identifier for this deposit. /// @dev The delegatee may not be the zero address. The deposit will be owned by the message /// sender, and the beneficiary will also be the message sender. function stake(uint96 _amount, address _delegatee) external returns (DepositIdentifier _depositId) { _depositId = _stake(msg.sender, _amount, _delegatee, msg.sender); } /// @notice Method to stake tokens to a new deposit. The caller must pre-approve the staking /// contract to spend at least the would-be staked amount of the token. /// @param _amount Quantity of the staking token to stake. /// @param _delegatee Address to assign the governance voting weight of the staked tokens. /// @param _beneficiary Address that will accrue rewards for this stake. /// @return _depositId Unique identifier for this deposit. /// @dev Neither the delegatee nor the beneficiary may be the zero address. The deposit will be /// owned by the message sender. function stake(uint96 _amount, address _delegatee, address _beneficiary) external returns (DepositIdentifier _depositId) { _depositId = _stake(msg.sender, _amount, _delegatee, _beneficiary); } /// @notice Method to stake tokens to a new deposit. Before the staking operation occurs, a /// signature is passed to the token contract's permit method to spend the would-be staked amount /// of the token. /// @param _amount Quantity of the staking token to stake. /// @param _delegatee Address to assign the governance voting weight of the staked tokens. /// @param _beneficiary Address that will accrue rewards for this stake. /// @param _deadline The timestamp after which the permit signature should expire. /// @param _v ECDSA signature component: Parity of the `y` coordinate of point `R` /// @param _r ECDSA signature component: x-coordinate of `R` /// @param _s ECDSA signature component: `s` value of the signature /// @return _depositId Unique identifier for this deposit. /// @dev Neither the delegatee nor the beneficiary may be the zero address. The deposit will be /// owned by the message sender. function permitAndStake( uint96 _amount, address _delegatee, address _beneficiary, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s ) external returns (DepositIdentifier _depositId) { try STAKE_TOKEN.permit(msg.sender, address(this), _amount, _deadline, _v, _r, _s) {} catch {} _depositId = _stake(msg.sender, _amount, _delegatee, _beneficiary); } /// @notice Stake tokens to a new deposit on behalf of a user, using a signature to validate the /// user's intent. The caller must pre-approve the staking contract to spend at least the /// would-be staked amount of the token. /// @param _amount Quantity of the staking token to stake. /// @param _delegatee Address to assign the governance voting weight of the staked tokens. /// @param _beneficiary Address that will accrue rewards for this stake. /// @param _depositor Address of the user on whose behalf this stake is being made. /// @param _deadline The timestamp after which the signature should expire. /// @param _signature Signature of the user authorizing this stake. /// @return _depositId Unique identifier for this deposit. /// @dev Neither the delegatee nor the beneficiary may be the zero address. function stakeOnBehalf( uint96 _amount, address _delegatee, address _beneficiary, address _depositor, uint256 _deadline, bytes memory _signature ) external returns (DepositIdentifier _depositId) { _revertIfPastDeadline(_deadline); _revertIfSignatureIsNotValidNow( _depositor, _hashTypedDataV4( keccak256( abi.encode( STAKE_TYPEHASH, _amount, _delegatee, _beneficiary, _depositor, _useNonce(_depositor), _deadline ) ) ), _signature ); _depositId = _stake(_depositor, _amount, _delegatee, _beneficiary); } /// @notice Add more staking tokens to an existing deposit. A staker should call this method when /// they have an existing deposit, and wish to stake more while retaining the same delegatee and /// beneficiary. /// @param _depositId Unique identifier of the deposit to which stake will be added. /// @param _amount Quantity of stake to be added. /// @dev The message sender must be the owner of the deposit. function stakeMore(DepositIdentifier _depositId, uint96 _amount) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, msg.sender); _stakeMore(deposit, _depositId, _amount); } /// @notice Add more staking tokens to an existing deposit. A staker should call this method when /// they have an existing deposit, and wish to stake more while retaining the same delegatee and /// beneficiary. Before the staking operation occurs, a signature is passed to the token /// contract's permit method to spend the would-be staked amount of the token. /// @param _depositId Unique identifier of the deposit to which stake will be added. /// @param _amount Quantity of stake to be added. /// @param _deadline The timestamp after which the permit signature should expire. /// @param _v ECDSA signature component: Parity of the `y` coordinate of point `R` /// @param _r ECDSA signature component: x-coordinate of `R` /// @param _s ECDSA signature component: `s` value of the signature /// @dev The message sender must be the owner of the deposit. function permitAndStakeMore( DepositIdentifier _depositId, uint96 _amount, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s ) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, msg.sender); try STAKE_TOKEN.permit(msg.sender, address(this), _amount, _deadline, _v, _r, _s) {} catch {} _stakeMore(deposit, _depositId, _amount); } /// @notice Add more staking tokens to an existing deposit on behalf of a user, using a signature /// to validate the user's intent. A staker should call this method when they have an existing /// deposit, and wish to stake more while retaining the same delegatee and beneficiary. /// @param _depositId Unique identifier of the deposit to which stake will be added. /// @param _amount Quantity of stake to be added. /// @param _depositor Address of the user on whose behalf this stake is being made. /// @param _deadline The timestamp after which the signature should expire. /// @param _signature Signature of the user authorizing this stake. function stakeMoreOnBehalf( DepositIdentifier _depositId, uint96 _amount, address _depositor, uint256 _deadline, bytes memory _signature ) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, _depositor); _revertIfPastDeadline(_deadline); _revertIfSignatureIsNotValidNow( _depositor, _hashTypedDataV4( keccak256( abi.encode( STAKE_MORE_TYPEHASH, _depositId, _amount, _depositor, _useNonce(_depositor), _deadline ) ) ), _signature ); _stakeMore(deposit, _depositId, _amount); } /// @notice For an existing deposit, change the address to which governance voting power is /// assigned. /// @param _depositId Unique identifier of the deposit which will have its delegatee altered. /// @param _newDelegatee Address of the new governance delegate. /// @dev The new delegatee may not be the zero address. The message sender must be the owner of /// the deposit. function alterDelegatee(DepositIdentifier _depositId, address _newDelegatee) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, msg.sender); _alterDelegatee(deposit, _depositId, _newDelegatee); } /// @notice For an existing deposit, change the address to which governance voting power is /// assigned on behalf of a user, using a signature to validate the user's intent. /// @param _depositId Unique identifier of the deposit which will have its delegatee altered. /// @param _newDelegatee Address of the new governance delegate. /// @param _depositor Address of the user on whose behalf this stake is being made. /// @param _deadline The timestamp after which the signature should expire. /// @param _signature Signature of the user authorizing this stake. /// @dev The new delegatee may not be the zero address. function alterDelegateeOnBehalf( DepositIdentifier _depositId, address _newDelegatee, address _depositor, uint256 _deadline, bytes memory _signature ) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, _depositor); _revertIfPastDeadline(_deadline); _revertIfSignatureIsNotValidNow( _depositor, _hashTypedDataV4( keccak256( abi.encode( ALTER_DELEGATEE_TYPEHASH, _depositId, _newDelegatee, _depositor, _useNonce(_depositor), _deadline ) ) ), _signature ); _alterDelegatee(deposit, _depositId, _newDelegatee); } /// @notice For an existing deposit, change the beneficiary to which staking rewards are /// accruing. /// @param _depositId Unique identifier of the deposit which will have its beneficiary altered. /// @param _newBeneficiary Address of the new rewards beneficiary. /// @dev The new beneficiary may not be the zero address. The message sender must be the owner of /// the deposit. function alterBeneficiary(DepositIdentifier _depositId, address _newBeneficiary) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, msg.sender); _alterBeneficiary(deposit, _depositId, _newBeneficiary); } /// @notice For an existing deposit, change the beneficiary to which staking rewards are /// accruing on behalf of a user, using a signature to validate the user's intent. /// @param _depositId Unique identifier of the deposit which will have its beneficiary altered. /// @param _newBeneficiary Address of the new rewards beneficiary. /// @param _depositor Address of the user on whose behalf this stake is being made. /// @param _deadline The timestamp after which the signature should expire. /// @param _signature Signature of the user authorizing this stake. /// @dev The new beneficiary may not be the zero address. function alterBeneficiaryOnBehalf( DepositIdentifier _depositId, address _newBeneficiary, address _depositor, uint256 _deadline, bytes memory _signature ) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, _depositor); _revertIfPastDeadline(_deadline); _revertIfSignatureIsNotValidNow( _depositor, _hashTypedDataV4( keccak256( abi.encode( ALTER_BENEFICIARY_TYPEHASH, _depositId, _newBeneficiary, _depositor, _useNonce(_depositor), _deadline ) ) ), _signature ); _alterBeneficiary(deposit, _depositId, _newBeneficiary); } /// @notice Withdraw staked tokens from an existing deposit. /// @param _depositId Unique identifier of the deposit from which stake will be withdrawn. /// @param _amount Quantity of staked token to withdraw. /// @dev The message sender must be the owner of the deposit. Stake is withdrawn to the message /// sender's account. function withdraw(DepositIdentifier _depositId, uint96 _amount) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, msg.sender); _withdraw(deposit, _depositId, _amount); } /// @notice Withdraw staked tokens from an existing deposit on behalf of a user, using a /// signature to validate the user's intent. /// @param _depositId Unique identifier of the deposit from which stake will be withdrawn. /// @param _amount Quantity of staked token to withdraw. /// @param _depositor Address of the user on whose behalf this stake is being made. /// @param _deadline The timestamp after which the signature should expire. /// @param _signature Signature of the user authorizing this stake. /// @dev Stake is withdrawn to the deposit owner's account. function withdrawOnBehalf( DepositIdentifier _depositId, uint96 _amount, address _depositor, uint256 _deadline, bytes memory _signature ) external { Deposit storage deposit = deposits[_depositId]; _revertIfNotDepositOwner(deposit, _depositor); _revertIfPastDeadline(_deadline); _revertIfSignatureIsNotValidNow( _depositor, _hashTypedDataV4( keccak256( abi.encode( WITHDRAW_TYPEHASH, _depositId, _amount, _depositor, _useNonce(_depositor), _deadline ) ) ), _signature ); _withdraw(deposit, _depositId, _amount); } /// @notice Claim reward tokens the message sender has earned as a stake beneficiary. Tokens are /// sent to the message sender. /// @return Amount of reward tokens claimed. function claimReward() external returns (uint256) { return _claimReward(msg.sender); } /// @notice Claim earned reward tokens for a beneficiary, using a signature to validate the /// beneficiary's intent. Tokens are sent to the beneficiary. /// @param _beneficiary Address of the beneficiary who will receive the reward. /// @param _deadline The timestamp after which the signature should expire. /// @param _signature Signature of the beneficiary authorizing this reward claim. /// @return Amount of reward tokens claimed. function claimRewardOnBehalf(address _beneficiary, uint256 _deadline, bytes memory _signature) external returns (uint256) { _revertIfPastDeadline(_deadline); _revertIfSignatureIsNotValidNow( _beneficiary, _hashTypedDataV4( keccak256( abi.encode(CLAIM_REWARD_TYPEHASH, _beneficiary, _useNonce(_beneficiary), _deadline) ) ), _signature ); return _claimReward(_beneficiary); } /// @notice Called by an authorized rewards notifier to alert the staking contract that a new /// reward has been transferred to it. It is assumed that the reward has already been /// transferred to this staking contract before the rewards notifier calls this method. /// @param _amount Quantity of reward tokens the staking contract is being notified of. /// @dev It is critical that only well behaved contracts are approved by the admin to call this /// method, for two reasons. /// /// 1. A misbehaving contract could grief stakers by frequently notifying this contract of tiny /// rewards, thereby continuously stretching out the time duration over which real rewards are /// distributed. It is required that reward notifiers supply reasonable rewards at reasonable /// intervals. // 2. A misbehaving contract could falsely notify this contract of rewards that were not actually /// distributed, creating a shortfall for those claiming their rewards after others. It is /// required that a notifier contract always transfers the `_amount` to this contract before /// calling this method. function notifyRewardAmount(uint256 _amount) external { if (!isRewardNotifier[msg.sender]) revert UniStaker__Unauthorized("not notifier", msg.sender); // We checkpoint the accumulator without updating the timestamp at which it was updated, // because that second operation will be done after updating the reward rate. rewardPerTokenAccumulatedCheckpoint = rewardPerTokenAccumulated(); if (block.timestamp >= rewardEndTime) { scaledRewardRate = (_amount * SCALE_FACTOR) / REWARD_DURATION; } else { uint256 _remainingReward = scaledRewardRate * (rewardEndTime - block.timestamp); scaledRewardRate = (_remainingReward + _amount * SCALE_FACTOR) / REWARD_DURATION; } rewardEndTime = block.timestamp + REWARD_DURATION; lastCheckpointTime = block.timestamp; if ((scaledRewardRate / SCALE_FACTOR) == 0) revert UniStaker__InvalidRewardRate(); // This check cannot _guarantee_ sufficient rewards have been transferred to the contract, // because it cannot isolate the unclaimed rewards owed to stakers left in the balance. While // this check is useful for preventing degenerate cases, it is not sufficient. Therefore, it is // critical that only safe reward notifier contracts are approved to call this method by the // admin. if ( (scaledRewardRate * REWARD_DURATION) > (REWARD_TOKEN.balanceOf(address(this)) * SCALE_FACTOR) ) revert UniStaker__InsufficientRewardBalance(); emit RewardNotified(_amount, msg.sender); } /// @notice Live value of the unclaimed rewards earned by a given beneficiary account with the /// scale factor included. Used internally for calculating reward checkpoints while minimizing /// precision loss. /// @return Live value of the unclaimed rewards earned by a given beneficiary account with the /// scale factor included. /// @dev See documentation for the public, non-scaled `unclaimedReward` method for more details. function _scaledUnclaimedReward(address _beneficiary) internal view returns (uint256) { return scaledUnclaimedRewardCheckpoint[_beneficiary] + ( earningPower[_beneficiary] * (rewardPerTokenAccumulated() - beneficiaryRewardPerTokenCheckpoint[_beneficiary]) ); } /// @notice Allows an address to increment their nonce and therefore invalidate any pending signed /// actions. function invalidateNonce() external { _useNonce(msg.sender); } /// @notice Internal method which finds the existing surrogate contract—or deploys a new one if /// none exists—for a given delegatee. /// @param _delegatee Account for which a surrogate is sought. /// @return _surrogate The address of the surrogate contract for the delegatee. function _fetchOrDeploySurrogate(address _delegatee) internal returns (DelegationSurrogate _surrogate) { _surrogate = surrogates[_delegatee]; if (address(_surrogate) == address(0)) { _surrogate = new DelegationSurrogate(STAKE_TOKEN, _delegatee); surrogates[_delegatee] = _surrogate; emit SurrogateDeployed(_delegatee, address(_surrogate)); } } /// @notice Internal convenience method which calls the `transferFrom` method on the stake token /// contract and reverts on failure. /// @param _from Source account from which stake token is to be transferred. /// @param _to Destination account of the stake token which is to be transferred. /// @param _value Quantity of stake token which is to be transferred. function _stakeTokenSafeTransferFrom(address _from, address _to, uint256 _value) internal { SafeERC20.safeTransferFrom(IERC20(address(STAKE_TOKEN)), _from, _to, _value); } /// @notice Internal method which generates and returns a unique, previously unused deposit /// identifier. /// @return _depositId Previously unused deposit identifier. function _useDepositId() internal returns (DepositIdentifier _depositId) { _depositId = nextDepositId; nextDepositId = DepositIdentifier.wrap(DepositIdentifier.unwrap(_depositId) + 1); } /// @notice Internal convenience methods which performs the staking operations. /// @dev This method must only be called after proper authorization has been completed. /// @dev See public stake methods for additional documentation. function _stake(address _depositor, uint96 _amount, address _delegatee, address _beneficiary) internal returns (DepositIdentifier _depositId) { _revertIfAddressZero(_delegatee); _revertIfAddressZero(_beneficiary); _checkpointGlobalReward(); _checkpointReward(_beneficiary); DelegationSurrogate _surrogate = _fetchOrDeploySurrogate(_delegatee); _depositId = _useDepositId(); totalStaked += _amount; depositorTotalStaked[_depositor] += _amount; earningPower[_beneficiary] += _amount; deposits[_depositId] = Deposit({ balance: _amount, owner: _depositor, delegatee: _delegatee, beneficiary: _beneficiary }); _stakeTokenSafeTransferFrom(_depositor, address(_surrogate), _amount); emit StakeDeposited(_depositor, _depositId, _amount, _amount); emit BeneficiaryAltered(_depositId, address(0), _beneficiary); emit DelegateeAltered(_depositId, address(0), _delegatee); } /// @notice Internal convenience method which adds more stake to an existing deposit. /// @dev This method must only be called after proper authorization has been completed. /// @dev See public stakeMore methods for additional documentation. function _stakeMore(Deposit storage deposit, DepositIdentifier _depositId, uint96 _amount) internal { _checkpointGlobalReward(); _checkpointReward(deposit.beneficiary); DelegationSurrogate _surrogate = surrogates[deposit.delegatee]; totalStaked += _amount; depositorTotalStaked[deposit.owner] += _amount; earningPower[deposit.beneficiary] += _amount; deposit.balance += _amount; _stakeTokenSafeTransferFrom(deposit.owner, address(_surrogate), _amount); emit StakeDeposited(deposit.owner, _depositId, _amount, deposit.balance); } /// @notice Internal convenience method which alters the delegatee of an existing deposit. /// @dev This method must only be called after proper authorization has been completed. /// @dev See public alterDelegatee methods for additional documentation. function _alterDelegatee( Deposit storage deposit, DepositIdentifier _depositId, address _newDelegatee ) internal { _revertIfAddressZero(_newDelegatee); DelegationSurrogate _oldSurrogate = surrogates[deposit.delegatee]; emit DelegateeAltered(_depositId, deposit.delegatee, _newDelegatee); deposit.delegatee = _newDelegatee; DelegationSurrogate _newSurrogate = _fetchOrDeploySurrogate(_newDelegatee); _stakeTokenSafeTransferFrom(address(_oldSurrogate), address(_newSurrogate), deposit.balance); } /// @notice Internal convenience method which alters the beneficiary of an existing deposit. /// @dev This method must only be called after proper authorization has been completed. /// @dev See public alterBeneficiary methods for additional documentation. function _alterBeneficiary( Deposit storage deposit, DepositIdentifier _depositId, address _newBeneficiary ) internal { _revertIfAddressZero(_newBeneficiary); _checkpointGlobalReward(); _checkpointReward(deposit.beneficiary); earningPower[deposit.beneficiary] -= deposit.balance; _checkpointReward(_newBeneficiary); emit BeneficiaryAltered(_depositId, deposit.beneficiary, _newBeneficiary); deposit.beneficiary = _newBeneficiary; earningPower[_newBeneficiary] += deposit.balance; } /// @notice Internal convenience method which withdraws the stake from an existing deposit. /// @dev This method must only be called after proper authorization has been completed. /// @dev See public withdraw methods for additional documentation. function _withdraw(Deposit storage deposit, DepositIdentifier _depositId, uint96 _amount) internal { _checkpointGlobalReward(); _checkpointReward(deposit.beneficiary); deposit.balance -= _amount; // overflow prevents withdrawing more than balance totalStaked -= _amount; depositorTotalStaked[deposit.owner] -= _amount; earningPower[deposit.beneficiary] -= _amount; _stakeTokenSafeTransferFrom(address(surrogates[deposit.delegatee]), deposit.owner, _amount); emit StakeWithdrawn(_depositId, _amount, deposit.balance); } /// @notice Internal convenience method which claims earned rewards. /// @return Amount of reward tokens claimed. /// @dev This method must only be called after proper authorization has been completed. /// @dev See public claimReward methods for additional documentation. function _claimReward(address _beneficiary) internal returns (uint256) { _checkpointGlobalReward(); _checkpointReward(_beneficiary); uint256 _reward = scaledUnclaimedRewardCheckpoint[_beneficiary] / SCALE_FACTOR; if (_reward == 0) return 0; // retain sub-wei dust that would be left due to the precision loss scaledUnclaimedRewardCheckpoint[_beneficiary] = scaledUnclaimedRewardCheckpoint[_beneficiary] - (_reward * SCALE_FACTOR); emit RewardClaimed(_beneficiary, _reward); SafeERC20.safeTransfer(REWARD_TOKEN, _beneficiary, _reward); return _reward; } /// @notice Checkpoints the global reward per token accumulator. function _checkpointGlobalReward() internal { rewardPerTokenAccumulatedCheckpoint = rewardPerTokenAccumulated(); lastCheckpointTime = lastTimeRewardDistributed(); } /// @notice Checkpoints the unclaimed rewards and reward per token accumulator of a given /// beneficiary account. /// @param _beneficiary The account for which reward parameters will be checkpointed. /// @dev This is a sensitive internal helper method that must only be called after global rewards /// accumulator has been checkpointed. It assumes the global `rewardPerTokenCheckpoint` is up to /// date. function _checkpointReward(address _beneficiary) internal { scaledUnclaimedRewardCheckpoint[_beneficiary] = _scaledUnclaimedReward(_beneficiary); beneficiaryRewardPerTokenCheckpoint[_beneficiary] = rewardPerTokenAccumulatedCheckpoint; } /// @notice Internal helper method which sets the admin address. /// @param _newAdmin Address of the new admin. function _setAdmin(address _newAdmin) internal { _revertIfAddressZero(_newAdmin); emit AdminSet(admin, _newAdmin); admin = _newAdmin; } /// @notice Internal helper method which reverts UniStaker__Unauthorized if the message sender is /// not the admin. function _revertIfNotAdmin() internal view { if (msg.sender != admin) revert UniStaker__Unauthorized("not admin", msg.sender); } /// @notice Internal helper method which reverts UniStaker__Unauthorized if the alleged owner is /// not the true owner of the deposit. /// @param deposit Deposit to validate. /// @param owner Alleged owner of deposit. function _revertIfNotDepositOwner(Deposit storage deposit, address owner) internal view { if (owner != deposit.owner) revert UniStaker__Unauthorized("not owner", owner); } /// @notice Internal helper method which reverts with UniStaker__InvalidAddress if the account in /// question is address zero. /// @param _account Account to verify. function _revertIfAddressZero(address _account) internal pure { if (_account == address(0)) revert UniStaker__InvalidAddress(); } function _revertIfPastDeadline(uint256 _deadline) internal view { if (block.timestamp > _deadline) revert UniStaker__ExpiredDeadline(); } /// @notice Internal helper method which reverts with UniStaker__InvalidSignature if the signature /// is invalid. /// @param _signer Address of the signer. /// @param _hash Hash of the message. /// @param _signature Signature to validate. function _revertIfSignatureIsNotValidNow(address _signer, bytes32 _hash, bytes memory _signature) internal view { bool _isValid = SignatureChecker.isValidSignatureNow(_signer, _hash, _signature); if (!_isValid) revert UniStaker__InvalidSignature(); }}
File 3 of 21 : DelegationSurrogate.sol
// SPDX-License-Identifier: AGPL-3.0-onlypragma solidity 0.8.23;import {IERC20Delegates} from "src/interfaces/IERC20Delegates.sol";/// @title DelegationSurrogate/// @author ScopeLift/// @notice A dead-simple contract whose only purpose is to hold governance tokens on behalf of/// users while delegating voting power to one specific delegatee. This is needed because a single/// address can only delegate its (full) token weight to a single address at a time. Thus, when a/// contract holds governance tokens in a pool on behalf of disparate token holders, those holders/// are typically disenfranchised from their governance rights.////// If a pool contract deploys a DelegationSurrogate for each delegatee, and transfers each/// depositor's tokens to the appropriate surrogate—or deploys it on their behalf—users can retain/// their governance rights.////// The pool contract deploying the surrogates must handle all accounting. The surrogate simply/// delegates its voting weight and max-approves its deployer to allow tokens to be reclaimed.contract DelegationSurrogate { /// @param _token The governance token that will be held by this surrogate /// @param _delegatee The address of the would-be voter to which this surrogate will delegate its /// voting weight. 100% of all voting tokens held by this surrogate will be delegated to this /// address. constructor(IERC20Delegates _token, address _delegatee) { _token.delegate(_delegatee); _token.approve(msg.sender, type(uint256).max); }}
File 4 of 21 : INotifiableRewardReceiver.sol
// SPDX-License-Identifier: AGPL-3.0-onlypragma solidity ^0.8.23;/// @title INotifiableRewardReceiver/// @author ScopeLift/// @notice The communication interface between the V3FactoryOwner contract and the UniStaker/// contract. In particular, the V3FactoryOwner only needs to know the latter implements the/// specified method in order to forward payouts to the UniStaker contract. The UniStaker contract/// receives the rewards and abstracts the distribution mechanicsinterface INotifiableRewardReceiver { /// @notice Method called to notify a reward receiver it has received a reward. /// @param _amount The amount of reward. function notifyRewardAmount(uint256 _amount) external;}
File 5 of 21 : IERC20Delegates.sol
// SPDX-License-Identifier: AGPL-3.0-onlypragma solidity ^0.8.23;/// @notice A subset of the ERC20Votes-style governance token to which UNI conforms./// Methods related to standard ERC20 functionality and to delegation are included./// These methods are needed in the context of this system. Methods related to check pointing,/// past voting weights, and other functionality are omitted.interface IERC20Delegates { // ERC20 related methods function allowance(address account, address spender) external view returns (uint256); function approve(address spender, uint256 rawAmount) external returns (bool); function balanceOf(address account) external view returns (uint256); function decimals() external view returns (uint8); function symbol() external view returns (string memory); function totalSupply() external view returns (uint256); function transfer(address dst, uint256 rawAmount) external returns (bool); function transferFrom(address src, address dst, uint256 rawAmount) external returns (bool); function permit( address owner, address spender, uint256 rawAmount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; // ERC20Votes delegation methods function delegate(address delegatee) external; function delegates(address) external view returns (address);}
File 6 of 21 : IERC20.sol
// 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);}
File 7 of 21 : SafeERC20.sol
// 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; }}
File 8 of 21 : Multicall.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/Multicall.sol)pragma solidity ^0.8.20;import {Address} from "./Address.sol";/** * @dev Provides a function to batch together multiple calls in a single external call. */abstract contract Multicall { /** * @dev Receives and executes a batch of function calls on this contract. * @custom:oz-upgrades-unsafe-allow-reachable delegatecall */ function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) { results = new bytes[](data.length); for (uint256 i = 0; i < data.length; i++) { results[i] = Address.functionDelegateCall(address(this), data[i]); } return results; }}
File 9 of 21 : Nonces.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/Nonces.sol)pragma solidity ^0.8.20;/** * @dev Provides tracking nonces for addresses. Nonces will only increment. */abstract contract Nonces { /** * @dev The nonce used for an `account` is not the expected current nonce. */ error InvalidAccountNonce(address account, uint256 currentNonce); mapping(address account => uint256) private _nonces; /** * @dev Returns the next unused nonce for an address. */ function nonces(address owner) public view virtual returns (uint256) { return _nonces[owner]; } /** * @dev Consumes a nonce. * * Returns the current value and increments nonce. */ function _useNonce(address owner) internal virtual returns (uint256) { // For each account, the nonce has an initial value of 0, can only be incremented by one, and cannot be // decremented or reset. This guarantees that the nonce never overflows. unchecked { // It is important to do x++ and not ++x here. return _nonces[owner]++; } } /** * @dev Same as {_useNonce} but checking that `nonce` is the next valid for `owner`. */ function _useCheckedNonce(address owner, uint256 nonce) internal virtual { uint256 current = _useNonce(owner); if (nonce != current) { revert InvalidAccountNonce(owner, current); } }}
File 10 of 21 : SignatureChecker.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/SignatureChecker.sol)pragma solidity ^0.8.20;import {ECDSA} from "./ECDSA.sol";import {IERC1271} from "../../interfaces/IERC1271.sol";/** * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like * Argent and Safe Wallet (previously Gnosis Safe). */library SignatureChecker { /** * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`. * * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus * change through time. It could return true at block N and false at block N+1 (or the opposite). */ function isValidSignatureNow(address signer, bytes32 hash, bytes memory signature) internal view returns (bool) { (address recovered, ECDSA.RecoverError error, ) = ECDSA.tryRecover(hash, signature); return (error == ECDSA.RecoverError.NoError && recovered == signer) || isValidERC1271SignatureNow(signer, hash, signature); } /** * @dev Checks if a signature is valid for a given signer and data hash. The signature is validated * against the signer smart contract using ERC1271. * * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus * change through time. It could return true at block N and false at block N+1 (or the opposite). */ function isValidERC1271SignatureNow( address signer, bytes32 hash, bytes memory signature ) internal view returns (bool) { (bool success, bytes memory result) = signer.staticcall( abi.encodeCall(IERC1271.isValidSignature, (hash, signature)) ); return (success && result.length >= 32 && abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector)); }}
File 11 of 21 : EIP712.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/EIP712.sol)pragma solidity ^0.8.20;import {MessageHashUtils} from "./MessageHashUtils.sol";import {ShortStrings, ShortString} from "../ShortStrings.sol";import {IERC5267} from "../../interfaces/IERC5267.sol";/** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose * encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract * does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to * produce the hash of their typed data using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain * separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the * separator from the immutable values, which is cheaper than accessing a cached version in cold storage. * * @custom:oz-upgrades-unsafe-allow state-variable-immutable */abstract contract EIP712 is IERC5267 { using ShortStrings for *; bytes32 private constant TYPE_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"); // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _cachedDomainSeparator; uint256 private immutable _cachedChainId; address private immutable _cachedThis; bytes32 private immutable _hashedName; bytes32 private immutable _hashedVersion; ShortString private immutable _name; ShortString private immutable _version; string private _nameFallback; string private _versionFallback; /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { _name = name.toShortStringWithFallback(_nameFallback); _version = version.toShortStringWithFallback(_versionFallback); _hashedName = keccak256(bytes(name)); _hashedVersion = keccak256(bytes(version)); _cachedChainId = block.chainid; _cachedDomainSeparator = _buildDomainSeparator(); _cachedThis = address(this); } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (address(this) == _cachedThis && block.chainid == _cachedChainId) { return _cachedDomainSeparator; } else { return _buildDomainSeparator(); } } function _buildDomainSeparator() private view returns (bytes32) { return keccak256(abi.encode(TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash); } /** * @dev See {IERC-5267}. */ function eip712Domain() public view virtual returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions ) { return ( hex"0f", // 01111 _EIP712Name(), _EIP712Version(), block.chainid, address(this), bytes32(0), new uint256[](0) ); } /** * @dev The name parameter for the EIP712 domain. * * NOTE: By default this function reads _name which is an immutable value. * It only reads from storage if necessary (in case the value is too large to fit in a ShortString). */ // solhint-disable-next-line func-name-mixedcase function _EIP712Name() internal view returns (string memory) { return _name.toStringWithFallback(_nameFallback); } /** * @dev The version parameter for the EIP712 domain. * * NOTE: By default this function reads _version which is an immutable value. * It only reads from storage if necessary (in case the value is too large to fit in a ShortString). */ // solhint-disable-next-line func-name-mixedcase function _EIP712Version() internal view returns (string memory) { return _version.toStringWithFallback(_versionFallback); }}
File 12 of 21 : IERC20Permit.sol
// 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);}
File 13 of 21 : Address.sol
// 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(); } }}
File 14 of 21 : ECDSA.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/ECDSA.sol)pragma solidity ^0.8.20;/** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS } /** * @dev The signature derives the `address(0)`. */ error ECDSAInvalidSignature(); /** * @dev The signature has an invalid length. */ error ECDSAInvalidSignatureLength(uint256 length); /** * @dev The signature has an S value that is in the upper half order. */ error ECDSAInvalidSignatureS(bytes32 s); /** * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not * return address(0) without also returning an error description. Errors are documented using an enum (error type) * and a bytes32 providing additional information about the error. * * If no error is returned, then the address can be used for verification purposes. * * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError, bytes32) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length)); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature); _throwError(error, errorArg); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] */ function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) { unchecked { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); // We do not check for an overflow here since the shift operation results in 0 or 1. uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. */ function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs); _throwError(error, errorArg); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError, bytes32) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS, s); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature, bytes32(0)); } return (signer, RecoverError.NoError, bytes32(0)); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) { (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s); _throwError(error, errorArg); return recovered; } /** * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided. */ function _throwError(RecoverError error, bytes32 errorArg) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert ECDSAInvalidSignature(); } else if (error == RecoverError.InvalidSignatureLength) { revert ECDSAInvalidSignatureLength(uint256(errorArg)); } else if (error == RecoverError.InvalidSignatureS) { revert ECDSAInvalidSignatureS(errorArg); } }}
File 15 of 21 : IERC1271.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1271.sol)pragma solidity ^0.8.20;/** * @dev Interface of the ERC1271 standard signature validation method for * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271]. */interface IERC1271 { /** * @dev Should return whether the signature provided is valid for the provided data * @param hash Hash of the data to be signed * @param signature Signature byte array associated with _data */ function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);}
File 16 of 21 : MessageHashUtils.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MessageHashUtils.sol)pragma solidity ^0.8.20;import {Strings} from "../Strings.sol";/** * @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing. * * The library provides methods for generating a hash of a message that conforms to the * https://eips.ethereum.org/EIPS/eip-191[EIP 191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712] * specifications. */library MessageHashUtils { /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x45` (`personal_sign` messages). * * The digest is calculated by prefixing a bytes32 `messageHash` with * `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method. * * NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with * keccak256, although any bytes32 value can be safely used because the final digest will * be re-hashed. * * See {ECDSA-recover}. */ function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) { /// @solidity memory-safe-assembly assembly { mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20) } } /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x45` (`personal_sign` messages). * * The digest is calculated by prefixing an arbitrary `message` with * `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method. * * See {ECDSA-recover}. */ function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) { return keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message)); } /** * @dev Returns the keccak256 digest of an EIP-191 signed data with version * `0x00` (data with intended validator). * * The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended * `validator` address. Then hashing the result. * * See {ECDSA-recover}. */ function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) { return keccak256(abi.encodePacked(hex"19_00", validator, data)); } /** * @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`). * * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with * `\x19\x01` and hashing the result. It corresponds to the hash signed by the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712. * * See {ECDSA-recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(ptr, hex"19_01") mstore(add(ptr, 0x02), domainSeparator) mstore(add(ptr, 0x22), structHash) digest := keccak256(ptr, 0x42) } }}
File 17 of 21 : ShortStrings.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/ShortStrings.sol)pragma solidity ^0.8.20;import {StorageSlot} from "./StorageSlot.sol";// | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |// | length | 0x BB |type ShortString is bytes32;/** * @dev This library provides functions to convert short memory strings * into a `ShortString` type that can be used as an immutable variable. * * Strings of arbitrary length can be optimized using this library if * they are short enough (up to 31 bytes) by packing them with their * length (1 byte) in a single EVM word (32 bytes). Additionally, a * fallback mechanism can be used for every other case. * * Usage example: * * ```solidity * contract Named { * using ShortStrings for *; * * ShortString private immutable _name; * string private _nameFallback; * * constructor(string memory contractName) { * _name = contractName.toShortStringWithFallback(_nameFallback); * } * * function name() external view returns (string memory) { * return _name.toStringWithFallback(_nameFallback); * } * } * ``` */library ShortStrings { // Used as an identifier for strings longer than 31 bytes. bytes32 private constant FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF; error StringTooLong(string str); error InvalidShortString(); /** * @dev Encode a string of at most 31 chars into a `ShortString`. * * This will trigger a `StringTooLong` error is the input string is too long. */ function toShortString(string memory str) internal pure returns (ShortString) { bytes memory bstr = bytes(str); if (bstr.length > 31) { revert StringTooLong(str); } return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length)); } /** * @dev Decode a `ShortString` back to a "normal" string. */ function toString(ShortString sstr) internal pure returns (string memory) { uint256 len = byteLength(sstr); // using `new string(len)` would work locally but is not memory safe. string memory str = new string(32); /// @solidity memory-safe-assembly assembly { mstore(str, len) mstore(add(str, 0x20), sstr) } return str; } /** * @dev Return the length of a `ShortString`. */ function byteLength(ShortString sstr) internal pure returns (uint256) { uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF; if (result > 31) { revert InvalidShortString(); } return result; } /** * @dev Encode a string into a `ShortString`, or write it to storage if it is too long. */ function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) { if (bytes(value).length < 32) { return toShortString(value); } else { StorageSlot.getStringSlot(store).value = value; return ShortString.wrap(FALLBACK_SENTINEL); } } /** * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}. */ function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) { if (ShortString.unwrap(value) != FALLBACK_SENTINEL) { return toString(value); } else { return store; } } /** * @dev Return the length of a string that was encoded to `ShortString` or written to storage using * {setWithFallback}. * * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of * actual characters as the UTF-8 encoding of a single character can span over multiple bytes. */ function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) { if (ShortString.unwrap(value) != FALLBACK_SENTINEL) { return byteLength(value); } else { return bytes(store).length; } }}
File 18 of 21 : IERC5267.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol)pragma solidity ^0.8.20;interface IERC5267 { /** * @dev MAY be emitted to signal that the domain could have changed. */ event EIP712DomainChanged(); /** * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712 * signature. */ function eip712Domain() external view returns ( bytes1 fields, string memory name, string memory version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] memory extensions );}
File 19 of 21 : Strings.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)pragma solidity ^0.8.20;import {Math} from "./math/Math.sol";import {SignedMath} from "./math/SignedMath.sol";/** * @dev String operations. */library Strings { bytes16 private constant HEX_DIGITS = "0123456789abcdef"; uint8 private constant ADDRESS_LENGTH = 20; /** * @dev The `value` string doesn't fit in the specified `length`. */ error StringsInsufficientHexLength(uint256 value, uint256 length); /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), HEX_DIGITS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toStringSigned(int256 value) internal pure returns (string memory) { return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { uint256 localValue = value; bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = HEX_DIGITS[localValue & 0xf]; localValue >>= 4; } if (localValue != 0) { revert StringsInsufficientHexLength(value, length); } return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal * representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b)); }}
File 20 of 21 : StorageSlot.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol)// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.pragma solidity ^0.8.20;/** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ```solidity * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(newImplementation.code.length > 0); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` */library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } struct StringSlot { string value; } struct BytesSlot { bytes value; } /** * @dev Returns an `AddressSlot` with member `value` located at `slot`. */ function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` with member `value` located at `slot`. */ function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` representation of the string storage pointer `store`. */ function getStringSlot(string storage store) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } /** * @dev Returns an `BytesSlot` with member `value` located at `slot`. */ function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`. */ function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } }}
File 21 of 21 : Math.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)pragma solidity ^0.8.20;/** * @dev Standard math utilities missing in the Solidity language. */library Math { /** * @dev Muldiv operation overflow. */ error MathOverflowedMulDiv(); enum Rounding { Floor, // Toward negative infinity Ceil, // Toward positive infinity Trunc, // Toward zero Expand // Away from zero } /** * @dev Returns the addition of two unsigned integers, with an overflow flag. */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the subtraction of two unsigned integers, with an overflow flag. */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds towards infinity instead * of rounding towards zero. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { if (b == 0) { // Guarantee the same behavior as in a regular Solidity division. return a / b; } // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or * denominator == 0. * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by * Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0 = x * y; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. if (denominator <= prod1) { revert MathOverflowedMulDiv(); } /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. // Always >= 1. See https://cs.stackexchange.com/q/138556/92363. uint256 twos = denominator & (0 - denominator); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also // works in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded * towards zero. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256 of a positive value rounded towards zero. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0); } } /** * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers. */ function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) { return uint8(rounding) % 2 == 1; }}
File 22 of 21 : SignedMath.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)pragma solidity ^0.8.20;/** * @dev Standard signed math utilities missing in the Solidity language. */library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } }}
Settings
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Contract Security Audit
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Contract ABI
- JSON Format
- RAW/Text Format
[{"inputs":[{"internalType":"contract IERC20","name":"_rewardToken","type":"address"},{"internalType":"contract IERC20Delegates","name":"_stakeToken","type":"address"},{"internalType":"address","name":"_admin","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"currentNonce","type":"uint256"}],"name":"InvalidAccountNonce","type":"error"},{"inputs":[],"name":"InvalidShortString","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[{"internalType":"string","name":"str","type":"string"}],"name":"StringTooLong","type":"error"},{"inputs":[],"name":"UniStaker__ExpiredDeadline","type":"error"},{"inputs":[],"name":"UniStaker__InsufficientRewardBalance","type":"error"},{"inputs":[],"name":"UniStaker__InvalidAddress","type":"error"},{"inputs":[],"name":"UniStaker__InvalidRewardRate","type":"error"},{"inputs":[],"name":"UniStaker__InvalidSignature","type":"error"},{"inputs":[{"internalType":"bytes32","name":"reason","type":"bytes32"},{"internalType":"address","name":"caller","type":"address"}],"name":"UniStaker__Unauthorized","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oldAdmin","type":"address"},{"indexed":true,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"UniStaker.DepositIdentifier","name":"depositId","type":"uint256"},{"indexed":true,"internalType":"address","name":"oldBeneficiary","type":"address"},{"indexed":true,"internalType":"address","name":"newBeneficiary","type":"address"}],"name":"BeneficiaryAltered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"UniStaker.DepositIdentifier","name":"depositId","type":"uint256"},{"indexed":false,"internalType":"address","name":"oldDelegatee","type":"address"},{"indexed":false,"internalType":"address","name":"newDelegatee","type":"address"}],"name":"DelegateeAltered","type":"event"},{"anonymous":false,"inputs":[],"name":"EIP712DomainChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"beneficiary","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"RewardClaimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"notifier","type":"address"}],"name":"RewardNotified","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"bool","name":"isEnabled","type":"bool"}],"name":"RewardNotifierSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"UniStaker.DepositIdentifier","name":"depositId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"depositBalance","type":"uint256"}],"name":"StakeDeposited","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"UniStaker.DepositIdentifier","name":"depositId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"depositBalance","type":"uint256"}],"name":"StakeWithdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegatee","type":"address"},{"indexed":true,"internalType":"address","name":"surrogate","type":"address"}],"name":"SurrogateDeployed","type":"event"},{"inputs":[],"name":"ALTER_BENEFICIARY_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ALTER_DELEGATEE_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CLAIM_REWARD_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"REWARD_DURATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"REWARD_TOKEN","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"SCALE_FACTOR","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"STAKE_MORE_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"STAKE_TOKEN","outputs":[{"internalType":"contract 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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc20000000000000000000000001f9840a85d5af5bf1d1762f925bdaddc4201f98400000000000000000000000071218d9e40cac8f7c76a9aba2de7e6aae4e9c736-----Decoded View---------------
Arg [0] : _rewardToken (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
Arg [1] : _stakeToken (address): 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984
Arg [2] : _admin (address): 0x71218d9e40CaC8F7C76A9ABA2De7e6aAE4E9c736-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [1] : 0000000000000000000000001f9840a85d5af5bf1d1762f925bdaddc4201f984
Arg [2] : 00000000000000000000000071218d9e40cac8f7c76a9aba2de7e6aae4e9c736
Deployed Bytecode Sourcemap
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Swarm Source
ipfs://881acdf2b86321ce5553f215df4ff4b0142142c1d27dc4e4686ac1dfc4d20762
Block | Transaction | Difficulty | Gas Used | Reward |
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Block | Uncle Number | Difficulty | Gas Used | Reward |
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Validator Index | Block | Amount |
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Transaction Hash | Block | Value | Eth2 PubKey | Valid |
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Multichain Portfolio | 25 Chains
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Last updated: less than 1 sec ago
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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.
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