ERC-721
Protocol
Overview
Max Total Supply
447 maBEETS
Holders
436
Market
Onchain Market Cap
-
Circulating Supply Market Cap
-
Other Info
Token Contract
Balance
1 maBEETSLoading...
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Contract Source Code Verified (Exact Match)
Contract Name:
Reliquary
Compiler Version
v0.8.28+commit.7893614a
Optimization Enabled:
Yes with 200 runs
Other Settings:
cancun EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.15; import "./ReliquaryEvents.sol"; import "./interfaces/IReliquary.sol"; import "./interfaces/IEmissionCurve.sol"; import "./interfaces/IRewarder.sol"; import "./interfaces/INFTDescriptor.sol"; import "openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol"; import "openzeppelin-contracts/contracts/token/ERC721/extensions/ERC721Burnable.sol"; import "openzeppelin-contracts/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; import "openzeppelin-contracts/contracts/utils/Multicall.sol"; import "openzeppelin-contracts/contracts/access/AccessControlEnumerable.sol"; import "openzeppelin-contracts/contracts/security/ReentrancyGuard.sol"; /** * @title Reliquary * @author Justin Bebis, Zokunei & the Byte Masons team * * @notice This system is designed to manage incentives for deposited assets such that * behaviors can be programmed on a per-pool basis using maturity levels. Stake in a * pool, also referred to as "position," is represented by means of an NFT called a * "Relic." Each position has a "maturity" which captures the age of the position. * * @notice Deposits are tracked by Relic ID instead of by user. This allows for * increased composability without affecting accounting logic too much, and users can * trade their Relics without withdrawing liquidity or affecting the position's maturity. */ contract Reliquary is IReliquary, ERC721Burnable, ERC721Enumerable, AccessControlEnumerable, Multicall, ReentrancyGuard { using SafeERC20 for IERC20; /// @dev Access control roles. bytes32 private constant OPERATOR = keccak256("OPERATOR"); bytes32 private constant EMISSION_CURVE = keccak256("EMISSION_CURVE"); /// @dev Indicates whether tokens are being added to, or removed from, a pool. enum Kind { DEPOSIT, WITHDRAW, OTHER } /// @dev Level of precision rewards are calculated to. uint private constant ACC_REWARD_PRECISION = 1e12; /// @dev Nonce to use for new relicId. uint private idNonce; /// @notice Address of the reward token contract. address public immutable rewardToken; /// @notice Address of each NFTDescriptor contract. address[] public nftDescriptor; /// @notice Address of EmissionCurve contract. address public emissionCurve; /// @notice Info of each Reliquary pool. PoolInfo[] private poolInfo; /// @notice Level system for each Reliquary pool. LevelInfo[] private levels; /// @notice Address of the LP token for each Reliquary pool. address[] public poolToken; /// @notice Address of IRewarder contract for each Reliquary pool. address[] public rewarder; /// @notice Info of each staked position. mapping(uint => PositionInfo) internal positionForId; /// @dev Total allocation points. Must be the sum of all allocation points in all pools. uint public totalAllocPoint; error NonExistentRelic(); error BurningPrincipal(); error BurningRewards(); error RewardTokenAsPoolToken(); error EmptyArray(); error ArrayLengthMismatch(); error NonZeroFirstMaturity(); error UnsortedMaturityLevels(); error ZeroTotalAllocPoint(); error NonExistentPool(); error ZeroAmount(); error NotOwner(); error DuplicateRelicIds(); error RelicsNotOfSamePool(); error MergingEmptyRelics(); error MaxEmissionRateExceeded(); error NotApprovedOrOwner(); /** * @dev Constructs and initializes the contract. * @param _rewardToken The reward token contract address. * @param _emissionCurve The contract address for the EmissionCurve, which will return the emission rate. */ constructor(address _rewardToken, address _emissionCurve) ERC721("maBEETS Deposit", "maBEETS") { rewardToken = _rewardToken; emissionCurve = _emissionCurve; _grantRole(DEFAULT_ADMIN_ROLE, msg.sender); } /// @notice Sets a new EmissionCurve for overall rewardToken emissions. Can only be called with the proper role. /// @param _emissionCurve The contract address for the EmissionCurve, which will return the base emission rate. function setEmissionCurve(address _emissionCurve) external override onlyRole(EMISSION_CURVE) { emissionCurve = _emissionCurve; emit ReliquaryEvents.LogSetEmissionCurve(_emissionCurve); } /** * @notice Add a new pool for the specified LP. Can only be called by an operator. * @param allocPoint The allocation points for the new pool. * @param _poolToken Address of the pooled ERC-20 token. * @param _rewarder Address of the rewarder delegate. * @param requiredMaturities Array of maturity (in seconds) required to achieve each level for this pool. * @param levelMultipliers The multipliers applied to the amount of `_poolToken` for each level within this pool. * @param name Name of pool to be displayed in NFT image. * @param _nftDescriptor The contract address for NFTDescriptor, which will return the token URI. */ function addPool( uint allocPoint, address _poolToken, address _rewarder, uint[] calldata requiredMaturities, uint[] calldata levelMultipliers, string memory name, address _nftDescriptor ) external override onlyRole(OPERATOR) { if (_poolToken == rewardToken) revert RewardTokenAsPoolToken(); if (requiredMaturities.length == 0) revert EmptyArray(); if (requiredMaturities.length != levelMultipliers.length) revert ArrayLengthMismatch(); if (requiredMaturities[0] != 0) revert NonZeroFirstMaturity(); if (requiredMaturities.length > 1) { uint highestMaturity; for (uint i = 1; i < requiredMaturities.length; ) { if (requiredMaturities[i] <= highestMaturity) revert UnsortedMaturityLevels(); highestMaturity = requiredMaturities[i]; unchecked { ++i; } } } uint length = poolLength(); for (uint i; i < length; ) { _updatePool(i); unchecked { ++i; } } uint totalAlloc = totalAllocPoint + allocPoint; if (totalAlloc == 0) revert ZeroTotalAllocPoint(); totalAllocPoint = totalAlloc; poolToken.push(_poolToken); rewarder.push(_rewarder); nftDescriptor.push(_nftDescriptor); poolInfo.push( PoolInfo({ allocPoint: allocPoint, lastRewardTime: block.timestamp, accRewardPerShare: 0, name: name }) ); levels.push( LevelInfo({ requiredMaturities: requiredMaturities, multipliers: levelMultipliers, balance: new uint[](levelMultipliers.length) }) ); emit ReliquaryEvents.LogPoolAddition((poolToken.length - 1), allocPoint, _poolToken, _rewarder, _nftDescriptor); } /** * @notice Modify the given pool's properties. Can only be called by an operator. * @param pid The index of the pool. See poolInfo. * @param allocPoint New AP of the pool. * @param _rewarder Address of the rewarder delegate. * @param name Name of pool to be displayed in NFT image. * @param _nftDescriptor The contract address for NFTDescriptor, which will return the token URI. * @param overwriteRewarder True if _rewarder should be set. Otherwise _rewarder is ignored. */ function modifyPool( uint pid, uint allocPoint, address _rewarder, string calldata name, address _nftDescriptor, bool overwriteRewarder ) external override onlyRole(OPERATOR) { if (pid >= poolInfo.length) revert NonExistentPool(); uint length = poolLength(); for (uint i; i < length; ) { _updatePool(i); unchecked { ++i; } } PoolInfo storage pool = poolInfo[pid]; uint totalAlloc = totalAllocPoint + allocPoint - pool.allocPoint; if (totalAlloc == 0) revert ZeroTotalAllocPoint(); totalAllocPoint = totalAlloc; pool.allocPoint = allocPoint; if (overwriteRewarder) { rewarder[pid] = _rewarder; } pool.name = name; nftDescriptor[pid] = _nftDescriptor; emit ReliquaryEvents.LogPoolModified( pid, allocPoint, overwriteRewarder ? _rewarder : rewarder[pid], _nftDescriptor ); } /// @notice Update reward variables for all pools. Be careful of gas spending! /// @param pids Pool IDs of all to be updated. Make sure to update all active pools. function massUpdatePools(uint[] calldata pids) external override nonReentrant { for (uint i; i < pids.length; ) { _updatePool(pids[i]); unchecked { ++i; } } } /// @notice Update reward variables of the given pool. /// @param pid The index of the pool. See poolInfo. function updatePool(uint pid) external override nonReentrant { _updatePool(pid); } /** * @notice Deposit pool tokens to Reliquary for reward token allocation. * @param amount Token amount to deposit. * @param relicId NFT ID of the position being deposited to. */ function deposit(uint amount, uint relicId) external override nonReentrant { _requireApprovedOrOwner(relicId); _deposit(amount, relicId); } /** * @notice Withdraw pool tokens. * @param amount token amount to withdraw. * @param relicId NFT ID of the position being withdrawn. */ function withdraw(uint amount, uint relicId) external override nonReentrant { if (amount == 0) revert ZeroAmount(); _requireApprovedOrOwner(relicId); (uint poolId, ) = _updatePosition(amount, relicId, Kind.WITHDRAW, address(0)); IERC20(poolToken[poolId]).safeTransfer(msg.sender, amount); emit ReliquaryEvents.Withdraw(poolId, amount, msg.sender, relicId); } /** * @notice Harvest proceeds for transaction sender to owner of Relic `relicId`. * @param relicId NFT ID of the position being harvested. * @param harvestTo Address to send rewards to (zero address if harvest should not be performed). */ function harvest(uint relicId, address harvestTo) external override nonReentrant { _requireApprovedOrOwner(relicId); (uint poolId, uint _pendingReward) = _updatePosition(0, relicId, Kind.OTHER, harvestTo); emit ReliquaryEvents.Harvest(poolId, _pendingReward, harvestTo, relicId); } /** * @notice Withdraw pool tokens and harvest proceeds for transaction sender to owner of Relic `relicId`. * @param amount token amount to withdraw. * @param relicId NFT ID of the position being withdrawn and harvested. * @param harvestTo Address to send rewards to (zero address if harvest should not be performed). */ function withdrawAndHarvest(uint amount, uint relicId, address harvestTo) external override nonReentrant { if (amount == 0) revert ZeroAmount(); _requireApprovedOrOwner(relicId); (uint poolId, uint _pendingReward) = _updatePosition(amount, relicId, Kind.WITHDRAW, harvestTo); IERC20(poolToken[poolId]).safeTransfer(msg.sender, amount); emit ReliquaryEvents.Withdraw(poolId, amount, msg.sender, relicId); emit ReliquaryEvents.Harvest(poolId, _pendingReward, harvestTo, relicId); } /** * @notice Withdraw without caring about rewards. EMERGENCY ONLY. * @param relicId NFT ID of the position to emergency withdraw from and burn. */ function emergencyWithdraw(uint relicId) external override nonReentrant { address to = ownerOf(relicId); if (to != msg.sender) revert NotOwner(); PositionInfo storage position = positionForId[relicId]; uint amount = position.amount; uint poolId = position.poolId; levels[poolId].balance[position.level] -= amount; _burn(relicId); delete positionForId[relicId]; IERC20(poolToken[poolId]).safeTransfer(to, amount); emit ReliquaryEvents.EmergencyWithdraw(poolId, amount, to, relicId); } /// @notice Update position without performing a deposit/withdraw/harvest. /// @param relicId The NFT ID of the position being updated. function updatePosition(uint relicId) external override nonReentrant { if (!_exists(relicId)) revert NonExistentRelic(); _updatePosition(0, relicId, Kind.OTHER, address(0)); } /// @notice Returns a PositionInfo object for the given relicId. function getPositionForId(uint relicId) external view override returns (PositionInfo memory position) { position = positionForId[relicId]; } /// @notice Returns a PoolInfo object for pool ID `pid`. function getPoolInfo(uint pid) external view override returns (PoolInfo memory pool) { pool = poolInfo[pid]; } /// @notice Returns a LevelInfo object for pool ID `pid`. function getLevelInfo(uint pid) external view override returns (LevelInfo memory levelInfo) { levelInfo = levels[pid]; } /** * @notice View function to retrieve the relicIds, poolIds, and pendingReward for each Relic owned by an address. * @param owner Address of the owner to retrieve info for. * @return pendingRewards Array of PendingReward objects. */ function pendingRewardsOfOwner( address owner ) external view override returns (PendingReward[] memory pendingRewards) { uint balance = balanceOf(owner); pendingRewards = new PendingReward[](balance); for (uint i; i < balance; ) { uint relicId = tokenOfOwnerByIndex(owner, i); pendingRewards[i] = PendingReward({ relicId: relicId, poolId: positionForId[relicId].poolId, pendingReward: pendingReward(relicId) }); unchecked { ++i; } } } /** * @notice View function to retrieve owned positions for an address. * @param owner Address of the owner to retrieve info for. * @return relicIds Each relicId owned by the given address. * @return positionInfos The PositionInfo object for each relicId. */ function relicPositionsOfOwner( address owner ) external view override returns (uint[] memory relicIds, PositionInfo[] memory positionInfos) { uint balance = balanceOf(owner); relicIds = new uint[](balance); positionInfos = new PositionInfo[](balance); for (uint i; i < balance; ) { relicIds[i] = tokenOfOwnerByIndex(owner, i); positionInfos[i] = positionForId[relicIds[i]]; unchecked { ++i; } } } /// @notice Returns whether `spender` is allowed to manage Relic `relicId`. function isApprovedOrOwner(address spender, uint relicId) external view override returns (bool) { return _isApprovedOrOwner(spender, relicId); } /** * @notice Create a new Relic NFT and deposit into this position. * @param to Address to mint the Relic to. * @param pid The index of the pool. See poolInfo. * @param amount Token amount to deposit. */ function createRelicAndDeposit( address to, uint pid, uint amount ) public virtual override nonReentrant returns (uint id) { if (pid >= poolInfo.length) revert NonExistentPool(); id = _mint(to); PositionInfo storage position = positionForId[id]; position.poolId = pid; _deposit(amount, id); emit ReliquaryEvents.CreateRelic(pid, to, id); } /** * @notice Split an owned Relic into a new one, while maintaining maturity. * @param fromId The NFT ID of the Relic to split from. * @param amount Amount to move from existing Relic into the new one. * @param to Address to mint the Relic to. * @return newId The NFT ID of the new Relic. */ function split(uint fromId, uint amount, address to) public virtual override nonReentrant returns (uint newId) { if (amount == 0) revert ZeroAmount(); _requireApprovedOrOwner(fromId); PositionInfo storage fromPosition = positionForId[fromId]; uint fromAmount = fromPosition.amount; uint newFromAmount = fromAmount - amount; fromPosition.amount = newFromAmount; newId = _mint(to); PositionInfo storage newPosition = positionForId[newId]; newPosition.amount = amount; newPosition.entry = fromPosition.entry; uint level = fromPosition.level; newPosition.level = level; uint poolId = fromPosition.poolId; newPosition.poolId = poolId; uint multiplier = _updatePool(poolId) * levels[poolId].multipliers[level]; uint pendingFrom = (fromAmount * multiplier) / ACC_REWARD_PRECISION - fromPosition.rewardDebt; if (pendingFrom != 0) { fromPosition.rewardCredit += pendingFrom; } fromPosition.rewardDebt = (newFromAmount * multiplier) / ACC_REWARD_PRECISION; newPosition.rewardDebt = (amount * multiplier) / ACC_REWARD_PRECISION; emit ReliquaryEvents.CreateRelic(poolId, to, newId); emit ReliquaryEvents.Split(fromId, newId, amount); } /** * @notice Transfer amount from one Relic into another, updating maturity in the receiving Relic. * @param fromId The NFT ID of the Relic to transfer from. * @param toId The NFT ID of the Relic being transferred to. * @param amount The amount being transferred. */ function shift(uint fromId, uint toId, uint amount) public virtual override nonReentrant { if (amount == 0) revert ZeroAmount(); if (fromId == toId) revert DuplicateRelicIds(); _requireApprovedOrOwner(fromId); _requireApprovedOrOwner(toId); PositionInfo storage fromPosition = positionForId[fromId]; uint fromAmount = fromPosition.amount; uint poolId = fromPosition.poolId; PositionInfo storage toPosition = positionForId[toId]; if (poolId != toPosition.poolId) revert RelicsNotOfSamePool(); uint toAmount = toPosition.amount; toPosition.entry = (fromAmount * fromPosition.entry + toAmount * toPosition.entry) / (fromAmount + toAmount); uint newFromAmount = fromAmount - amount; fromPosition.amount = newFromAmount; uint newToAmount = toAmount + amount; toPosition.amount = newToAmount; (uint fromLevel, uint oldToLevel, uint newToLevel) = _shiftLevelBalances( fromId, toId, poolId, amount, toAmount, newToAmount ); uint accRewardPerShare = _updatePool(poolId); uint fromMultiplier = accRewardPerShare * levels[poolId].multipliers[fromLevel]; uint pendingFrom = (fromAmount * fromMultiplier) / ACC_REWARD_PRECISION - fromPosition.rewardDebt; if (pendingFrom != 0) { fromPosition.rewardCredit += pendingFrom; } uint pendingTo = (toAmount * levels[poolId].multipliers[oldToLevel] * accRewardPerShare) / ACC_REWARD_PRECISION - toPosition.rewardDebt; if (pendingTo != 0) { toPosition.rewardCredit += pendingTo; } fromPosition.rewardDebt = (newFromAmount * fromMultiplier) / ACC_REWARD_PRECISION; toPosition.rewardDebt = (newToAmount * accRewardPerShare * levels[poolId].multipliers[newToLevel]) / ACC_REWARD_PRECISION; emit ReliquaryEvents.Shift(fromId, toId, amount); } /** * @notice Transfer entire position (including rewards) from one Relic into another, burning it * and updating maturity in the receiving Relic. * @param fromId The NFT ID of the Relic to transfer from. * @param toId The NFT ID of the Relic being transferred to. */ function merge(uint fromId, uint toId) public virtual override nonReentrant { if (fromId == toId) revert DuplicateRelicIds(); _requireApprovedOrOwner(fromId); _requireApprovedOrOwner(toId); PositionInfo storage fromPosition = positionForId[fromId]; uint fromAmount = fromPosition.amount; uint poolId = fromPosition.poolId; PositionInfo storage toPosition = positionForId[toId]; if (poolId != toPosition.poolId) revert RelicsNotOfSamePool(); uint toAmount = toPosition.amount; uint newToAmount = toAmount + fromAmount; if (newToAmount == 0) revert MergingEmptyRelics(); toPosition.entry = (fromAmount * fromPosition.entry + toAmount * toPosition.entry) / newToAmount; toPosition.amount = newToAmount; (uint fromLevel, uint oldToLevel, uint newToLevel) = _shiftLevelBalances( fromId, toId, poolId, fromAmount, toAmount, newToAmount ); uint accRewardPerShare = _updatePool(poolId); uint pendingTo = (accRewardPerShare * (fromAmount * levels[poolId].multipliers[fromLevel] + toAmount * levels[poolId].multipliers[oldToLevel])) / ACC_REWARD_PRECISION + fromPosition.rewardCredit - fromPosition.rewardDebt - toPosition.rewardDebt; if (pendingTo != 0) { toPosition.rewardCredit += pendingTo; } toPosition.rewardDebt = (newToAmount * accRewardPerShare * levels[poolId].multipliers[newToLevel]) / ACC_REWARD_PRECISION; _burn(fromId); delete positionForId[fromId]; emit ReliquaryEvents.Merge(fromId, toId, fromAmount); } /// @notice Burns the Relic with ID `tokenId`. Cannot be called if there is any principal or rewards in the Relic. function burn(uint tokenId) public virtual override(IReliquary, ERC721Burnable) { if (positionForId[tokenId].amount != 0) revert BurningPrincipal(); if (pendingReward(tokenId) != 0) revert BurningRewards(); super.burn(tokenId); } /** * @notice View function to see pending reward tokens on frontend. * @param relicId ID of the position. * @return pending reward amount for a given position owner. */ function pendingReward(uint relicId) public view override returns (uint pending) { PositionInfo storage position = positionForId[relicId]; uint poolId = position.poolId; PoolInfo storage pool = poolInfo[poolId]; uint accRewardPerShare = pool.accRewardPerShare; uint lpSupply = _poolBalance(position.poolId); uint lastRewardTime = pool.lastRewardTime; uint secondsSinceReward = block.timestamp - lastRewardTime; if (secondsSinceReward != 0 && lpSupply != 0) { uint reward = (secondsSinceReward * _baseEmissionsPerSecond(lastRewardTime) * pool.allocPoint) / totalAllocPoint; accRewardPerShare += (reward * ACC_REWARD_PRECISION) / lpSupply; } uint leveledAmount = position.amount * levels[poolId].multipliers[position.level]; pending = (leveledAmount * accRewardPerShare) / ACC_REWARD_PRECISION + position.rewardCredit - position.rewardDebt; } /** * @notice View function to see level of position if it were to be updated. * @param relicId ID of the position. * @return level Level for given position upon update. */ function levelOnUpdate(uint relicId) public view override returns (uint level) { PositionInfo storage position = positionForId[relicId]; LevelInfo storage levelInfo = levels[position.poolId]; uint length = levelInfo.requiredMaturities.length; if (length == 1) { return 0; } uint maturity = block.timestamp - position.entry; for (level = length - 1; true; ) { if (maturity >= levelInfo.requiredMaturities[level]) { break; } unchecked { --level; } } } /// @notice Returns the number of Reliquary pools. function poolLength() public view override returns (uint pools) { pools = poolInfo.length; } /** * @notice Returns the ERC721 tokenURI given by the pool's NFTDescriptor. * @dev Can be gas expensive if used in a transaction and the NFTDescriptor is complex. * @param tokenId The NFT ID of the Relic to get the tokenURI for. */ function tokenURI(uint tokenId) public view override(ERC721) returns (string memory) { if (!_exists(tokenId)) revert NonExistentRelic(); return INFTDescriptor(nftDescriptor[positionForId[tokenId].poolId]).constructTokenURI(tokenId); } /// @dev Implement ERC165 to return which interfaces this contract conforms to function supportsInterface( bytes4 interfaceId ) public view virtual override(IERC165, AccessControlEnumerable, ERC721, ERC721Enumerable) returns (bool) { return interfaceId == type(IReliquary).interfaceId || super.supportsInterface(interfaceId); } /// @dev Internal _updatePool function without nonReentrant modifier. function _updatePool(uint pid) internal returns (uint accRewardPerShare) { if (pid >= poolLength()) revert NonExistentPool(); PoolInfo storage pool = poolInfo[pid]; uint timestamp = block.timestamp; uint lastRewardTime = pool.lastRewardTime; uint secondsSinceReward = timestamp - lastRewardTime; accRewardPerShare = pool.accRewardPerShare; if (secondsSinceReward != 0) { uint lpSupply = _poolBalance(pid); if (lpSupply != 0) { uint reward = (secondsSinceReward * _baseEmissionsPerSecond(lastRewardTime) * pool.allocPoint) / totalAllocPoint; accRewardPerShare += (reward * ACC_REWARD_PRECISION) / lpSupply; pool.accRewardPerShare = accRewardPerShare; } pool.lastRewardTime = timestamp; emit ReliquaryEvents.LogUpdatePool(pid, timestamp, lpSupply, accRewardPerShare); } } /// @dev Internal deposit function that assumes relicId is valid. function _deposit(uint amount, uint relicId) internal { if (amount == 0) revert ZeroAmount(); (uint poolId, ) = _updatePosition(amount, relicId, Kind.DEPOSIT, address(0)); IERC20(poolToken[poolId]).safeTransferFrom(msg.sender, address(this), amount); emit ReliquaryEvents.Deposit(poolId, amount, ownerOf(relicId), relicId); } /** * @dev Internal function called whenever a position's state needs to be modified. * @param amount Amount of poolToken to deposit/withdraw. * @param relicId The NFT ID of the position being updated. * @param kind Indicates whether tokens are being added to, or removed from, a pool. * @param harvestTo Address to send rewards to (zero address if harvest should not be performed). * @return poolId Pool ID of the given position. * @return _pendingReward Pending reward for given position owner. */ function _updatePosition( uint amount, uint relicId, Kind kind, address harvestTo ) internal returns (uint poolId, uint _pendingReward) { PositionInfo storage position = positionForId[relicId]; poolId = position.poolId; uint accRewardPerShare = _updatePool(poolId); uint oldAmount = position.amount; uint newAmount; if (kind == Kind.DEPOSIT) { _updateEntry(amount, relicId); newAmount = oldAmount + amount; position.amount = newAmount; } else if (kind == Kind.WITHDRAW) { newAmount = oldAmount - amount; position.amount = newAmount; } else { newAmount = oldAmount; } uint oldLevel = position.level; uint newLevel = _updateLevel(relicId); if (oldLevel != newLevel) { levels[poolId].balance[oldLevel] -= oldAmount; levels[poolId].balance[newLevel] += newAmount; } else if (kind == Kind.DEPOSIT) { levels[poolId].balance[oldLevel] += amount; } else if (kind == Kind.WITHDRAW) { levels[poolId].balance[oldLevel] -= amount; } _pendingReward = (oldAmount * levels[poolId].multipliers[oldLevel] * accRewardPerShare) / ACC_REWARD_PRECISION - position.rewardDebt; position.rewardDebt = (newAmount * levels[poolId].multipliers[newLevel] * accRewardPerShare) / ACC_REWARD_PRECISION; bool _harvest = harvestTo != address(0); if (!_harvest && _pendingReward != 0) { position.rewardCredit += _pendingReward; } else if (_harvest) { uint total = _pendingReward + position.rewardCredit; uint received = _receivedReward(total); position.rewardCredit = total - received; if (received != 0) { IERC20(rewardToken).safeTransfer(harvestTo, received); address _rewarder = rewarder[poolId]; if (_rewarder != address(0)) { IRewarder(_rewarder).onReward(relicId, received, harvestTo); } } } if (kind == Kind.DEPOSIT) { address _rewarder = rewarder[poolId]; if (_rewarder != address(0)) { IRewarder(_rewarder).onDeposit(relicId, amount); } } else if (kind == Kind.WITHDRAW) { address _rewarder = rewarder[poolId]; if (_rewarder != address(0)) { IRewarder(_rewarder).onWithdraw(relicId, amount); } } } /** * @notice Updates the user's entry time based on the weight of their deposit or withdrawal. * @param amount The amount of the deposit / withdrawal. * @param relicId The NFT ID of the position being updated. */ function _updateEntry(uint amount, uint relicId) internal { PositionInfo storage position = positionForId[relicId]; uint weight = _findWeight(amount, position.amount); uint maturity = block.timestamp - position.entry; position.entry += (maturity * weight) / 1e18; } /** * @notice Updates the position's level based on entry time. * @param relicId The NFT ID of the position being updated. * @return newLevel Level of position after update. */ function _updateLevel(uint relicId) internal returns (uint newLevel) { newLevel = levelOnUpdate(relicId); PositionInfo storage position = positionForId[relicId]; if (position.level != newLevel) { position.level = newLevel; emit ReliquaryEvents.LevelChanged(relicId, newLevel); } } /// @dev Ensure the behavior of ERC721Enumerable _beforeTokenTransfer is preserved. function _beforeTokenTransfer(address from, address to, uint tokenId) internal override(ERC721, ERC721Enumerable) { ERC721Enumerable._beforeTokenTransfer(from, to, tokenId); } /** * @notice Calculate how much the owner will actually receive on harvest, given available reward tokens. * @param _pendingReward Amount of reward token owed. * @return received The minimum between amount owed and amount available. */ function _receivedReward(uint _pendingReward) internal view returns (uint received) { uint available = IERC20(rewardToken).balanceOf(address(this)); received = (available > _pendingReward) ? _pendingReward : available; } /// @notice Gets the base emission rate from external, upgradable contract. function _baseEmissionsPerSecond(uint lastRewardTime) internal view returns (uint rate) { rate = IEmissionCurve(emissionCurve).getRate(lastRewardTime); if (rate > 6e18) revert MaxEmissionRateExceeded(); } /** * @notice returns The total deposits of the pool's token, weighted by maturity level allocation. * @param pid The index of the pool. See poolInfo. * @return total The amount of pool tokens held by the contract. */ function _poolBalance(uint pid) internal view returns (uint total) { LevelInfo storage levelInfo = levels[pid]; uint length = levelInfo.balance.length; for (uint i; i < length; ) { total += levelInfo.balance[i] * levelInfo.multipliers[i]; unchecked { ++i; } } } /// @notice Require the sender is either the owner of the Relic or approved to transfer it. /// @param relicId The NFT ID of the Relic. function _requireApprovedOrOwner(uint relicId) internal view { if (!_isApprovedOrOwner(msg.sender, relicId)) revert NotApprovedOrOwner(); } /** * @notice Utility function to find weights without any underflows or zero division problems. * @param addedValue New value being added. * @param oldValue Current amount of x. */ function _findWeight(uint addedValue, uint oldValue) internal pure returns (uint weightNew) { if (oldValue == 0) { weightNew = 1e18; } else { if (oldValue < addedValue) { uint weightOld = (oldValue * 1e18) / (addedValue + oldValue); weightNew = 1e18 - weightOld; } else if (addedValue < oldValue) { weightNew = (addedValue * 1e18) / (addedValue + oldValue); } else { weightNew = 1e18 / 2; } } } /// @dev Handle updating balances for each affected tranche when shifting and merging. function _shiftLevelBalances( uint fromId, uint toId, uint poolId, uint amount, uint toAmount, uint newToAmount ) private returns (uint fromLevel, uint oldToLevel, uint newToLevel) { fromLevel = positionForId[fromId].level; oldToLevel = positionForId[toId].level; newToLevel = _updateLevel(toId); if (fromLevel != newToLevel) { levels[poolId].balance[fromLevel] -= amount; } if (oldToLevel != newToLevel) { levels[poolId].balance[oldToLevel] -= toAmount; } if (fromLevel != newToLevel && oldToLevel != newToLevel) { levels[poolId].balance[newToLevel] += newToAmount; } else if (fromLevel != newToLevel) { levels[poolId].balance[newToLevel] += amount; } else if (oldToLevel != newToLevel) { levels[poolId].balance[newToLevel] += toAmount; } } /// @dev Increments the ID nonce and mints a new Relic to `to`. function _mint(address to) private returns (uint id) { id = ++idNonce; _safeMint(to, id); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.17; library ReliquaryEvents { event CreateRelic(uint indexed pid, address indexed to, uint indexed relicId); event Deposit(uint indexed pid, uint amount, address indexed to, uint indexed relicId); event Withdraw(uint indexed pid, uint amount, address indexed to, uint indexed relicId); event EmergencyWithdraw(uint indexed pid, uint amount, address indexed to, uint indexed relicId); event Harvest(uint indexed pid, uint amount, address indexed to, uint indexed relicId); event LogPoolAddition( uint indexed pid, uint allocPoint, address indexed poolToken, address indexed rewarder, address nftDescriptor ); event LogPoolModified(uint indexed pid, uint allocPoint, address indexed rewarder, address nftDescriptor); event LogUpdatePool(uint indexed pid, uint lastRewardTime, uint lpSupply, uint accRewardPerShare); event LogSetEmissionCurve(address indexed emissionCurveAddress); event LevelChanged(uint indexed relicId, uint newLevel); event Split(uint indexed fromId, uint indexed toId, uint amount); event Shift(uint indexed fromId, uint indexed toId, uint amount); event Merge(uint indexed fromId, uint indexed toId, uint amount); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.15; import "openzeppelin-contracts/contracts/token/ERC721/extensions/IERC721Enumerable.sol"; /** * @notice Info for each Reliquary position. * `amount` LP token amount the position owner has provided. * `rewardDebt` Amount of reward token accumalated before the position's entry or last harvest. * `rewardCredit` Amount of reward token owed to the user on next harvest. * `entry` Used to determine the maturity of the position. * `poolId` ID of the pool to which this position belongs. * `level` Index of this position's level within the pool's array of levels. */ struct PositionInfo { uint amount; uint rewardDebt; uint rewardCredit; uint entry; // position owner's relative entry into the pool. uint poolId; // ensures that a single Relic is only used for one pool. uint level; } /** * @notice Info of each Reliquary pool. * `accRewardPerShare` Accumulated reward tokens per share of pool (1 / 1e12). * `lastRewardTime` Last timestamp the accumulated reward was updated. * `allocPoint` Pool's individual allocation - ratio of the total allocation. * `name` Name of pool to be displayed in NFT image. */ struct PoolInfo { uint accRewardPerShare; uint lastRewardTime; uint allocPoint; string name; } /** * @notice Info for each level in a pool that determines how maturity is rewarded. * `requiredMaturities` The minimum maturity (in seconds) required to reach each Level. * `multipliers` Multiplier for each level applied to amount of incentivized token when calculating rewards in the pool. * This is applied to both the numerator and denominator in the calculation such that the size of a user's position * is effectively considered to be the actual number of tokens times the multiplier for their level. * Also note that these multipliers do not affect the overall emission rate. * `balance` Total (actual) number of tokens deposited in positions at each level. */ struct LevelInfo { uint[] requiredMaturities; uint[] multipliers; uint[] balance; } /** * @notice Object representing pending rewards and related data for a position. * `relicId` The NFT ID of the given position. * `poolId` ID of the pool to which this position belongs. * `pendingReward` pending reward amount for a given position. */ struct PendingReward { uint relicId; uint poolId; uint pendingReward; } interface IReliquary is IERC721Enumerable { function setEmissionCurve(address _emissionCurve) external; function addPool( uint allocPoint, address _poolToken, address _rewarder, uint[] calldata requiredMaturity, uint[] calldata allocPoints, string memory name, address _nftDescriptor ) external; function modifyPool( uint pid, uint allocPoint, address _rewarder, string calldata name, address _nftDescriptor, bool overwriteRewarder ) external; function massUpdatePools(uint[] calldata pids) external; function updatePool(uint pid) external; function deposit(uint amount, uint relicId) external; function withdraw(uint amount, uint relicId) external; function harvest(uint relicId, address harvestTo) external; function withdrawAndHarvest(uint amount, uint relicId, address harvestTo) external; function emergencyWithdraw(uint relicId) external; function updatePosition(uint relicId) external; function getPositionForId(uint) external view returns (PositionInfo memory); function getPoolInfo(uint) external view returns (PoolInfo memory); function getLevelInfo(uint) external view returns (LevelInfo memory); function pendingRewardsOfOwner(address owner) external view returns (PendingReward[] memory pendingRewards); function relicPositionsOfOwner( address owner ) external view returns (uint[] memory relicIds, PositionInfo[] memory positionInfos); function isApprovedOrOwner(address, uint) external view returns (bool); function createRelicAndDeposit(address to, uint pid, uint amount) external returns (uint id); function split(uint relicId, uint amount, address to) external returns (uint newId); function shift(uint fromId, uint toId, uint amount) external; function merge(uint fromId, uint toId) external; function burn(uint tokenId) external; function pendingReward(uint relicId) external view returns (uint pending); function levelOnUpdate(uint relicId) external view returns (uint level); function poolLength() external view returns (uint); function rewardToken() external view returns (address); function nftDescriptor(uint) external view returns (address); function emissionCurve() external view returns (address); function poolToken(uint) external view returns (address); function rewarder(uint) external view returns (address); function totalAllocPoint() external view returns (uint); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.15; interface IEmissionCurve { function getRate(uint lastRewardTime) external view returns (uint rate); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.15; interface IRewarder { function onReward(uint relicId, uint rewardAmount, address to) external; function onDeposit(uint relicId, uint depositAmount) external; function onWithdraw(uint relicId, uint withdrawalAmount) external; function pendingTokens(uint relicId, uint rewardAmount) external view returns (address[] memory, uint[] memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.15; interface INFTDescriptor { function constructTokenURI(uint relicId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/draft-IERC20Permit.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/extensions/ERC721Burnable.sol) pragma solidity ^0.8.0; import "../ERC721.sol"; import "../../../utils/Context.sol"; /** * @title ERC721 Burnable Token * @dev ERC721 Token that can be burned (destroyed). */ abstract contract ERC721Burnable is Context, ERC721 { /** * @dev Burns `tokenId`. See {ERC721-_burn}. * * Requirements: * * - The caller must own `tokenId` or be an approved operator. */ function burn(uint256 tokenId) public virtual { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved"); _burn(tokenId); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol) pragma solidity ^0.8.0; import "../ERC721.sol"; import "./IERC721Enumerable.sol"; /** * @dev This implements an optional extension of {ERC721} defined in the EIP that adds * enumerability of all the token ids in the contract as well as all token ids owned by each * account. */ abstract contract ERC721Enumerable is ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => mapping(uint256 => uint256)) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) { return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds"); return _ownedTokens[owner][index]; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); if (from == address(0)) { _addTokenToAllTokensEnumeration(tokenId); } else if (from != to) { _removeTokenFromOwnerEnumeration(from, tokenId); } if (to == address(0)) { _removeTokenFromAllTokensEnumeration(tokenId); } else if (to != from) { _addTokenToOwnerEnumeration(to, tokenId); } } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { uint256 length = ERC721.balanceOf(to); _ownedTokens[to][length] = tokenId; _ownedTokensIndex[tokenId] = length; } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = ERC721.balanceOf(from) - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Multicall.sol) pragma solidity ^0.8.0; import "./Address.sol"; /** * @dev Provides a function to batch together multiple calls in a single external call. * * _Available since v4.1._ */ abstract contract Multicall { /** * @dev Receives and executes a batch of function calls on this contract. */ 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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol) pragma solidity ^0.8.0; import "./IAccessControlEnumerable.sol"; import "./AccessControl.sol"; import "../utils/structs/EnumerableSet.sol"; /** * @dev Extension of {AccessControl} that allows enumerating the members of each role. */ abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl { using EnumerableSet for EnumerableSet.AddressSet; mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) { return _roleMembers[role].at(index); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) { return _roleMembers[role].length(); } /** * @dev Overload {_grantRole} to track enumerable memberships */ function _grantRole(bytes32 role, address account) internal virtual override { super._grantRole(role, account); _roleMembers[role].add(account); } /** * @dev Overload {_revokeRole} to track enumerable memberships */ function _revokeRole(bytes32 role, address account) internal virtual override { super._revokeRole(role, account); _roleMembers[role].remove(account); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @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 amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol) pragma solidity ^0.8.0; /** * @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. */ 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]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) 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(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: address zero is not a valid owner"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: invalid token ID"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { _requireMinted(tokenId); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not token owner or approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { _requireMinted(tokenId); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved"); _safeTransfer(from, to, tokenId, data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { address owner = ERC721.ownerOf(tokenId); return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * This is an internal function that does not check if the sender is authorized to operate on the token. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals delete _tokenApprovals[tokenId]; _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner delete _tokenApprovals[tokenId]; _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits an {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits an {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Reverts if the `tokenId` has not been minted yet. */ function _requireMinted(uint256 tokenId) internal view virtual { require(_exists(tokenId), "ERC721: invalid token ID"); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { /// @solidity memory-safe-assembly assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControlEnumerable.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; /** * @dev External interface of AccessControlEnumerable declared to support ERC165 detection. */ interface IAccessControlEnumerable is IAccessControl { /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) external view returns (address); /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(account), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. * * May emit a {RoleRevoked} event. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * May emit a {RoleGranted} event. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/structs/EnumerableSet.sol) pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an array of EnumerableSet. * ==== */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastValue; // Update the index for the moved value set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { 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_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); 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); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
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Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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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)
0000000000000000000000002d0e0814e62d80056181f5cd932274405966e4f00000000000000000000000003a3b8a7a95b5e76c79aa85d25bde4ee5a445a130
-----Decoded View---------------
Arg [0] : _rewardToken (address): 0x2D0E0814E62D80056181F5cd932274405966e4f0
Arg [1] : _emissionCurve (address): 0x3A3b8a7a95b5e76C79aa85D25BDe4Ee5a445A130
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000002d0e0814e62d80056181f5cd932274405966e4f0
Arg [1] : 0000000000000000000000003a3b8a7a95b5e76c79aa85d25bde4ee5a445a130
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[ Download: CSV Export ]
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