ERC-721
NFT
Overview
Max Total Supply
496,892.34643757843393034 MAHAX
Holders
787
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
0.000000000000000009 MAHAXLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
MAHAXLocker
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
Yes with 100 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IERC20} from "@openzeppelin/contracts/interfaces/IERC20.sol"; import {ERC2981, IERC165} from "@openzeppelin/contracts/token/common/ERC2981.sol"; import {IERC721Receiver} from "@openzeppelin/contracts/interfaces/IERC721Receiver.sol"; import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {AccessControl} from "@openzeppelin/contracts/access/AccessControl.sol"; import {ERC721Enumerable} from "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; import {ITokenURIGenerator} from "./interfaces/ITokenURIGenerator.sol"; import {IRegistry} from "./interfaces/IRegistry.sol"; import {INFTLocker} from "./interfaces/INFTLocker.sol"; import {INFTStaker} from "./interfaces/INFTStaker.sol"; /** @title Voting Escrow @author Curve Finance @notice Votes have a weight depending on time, so that users are committed to the future of (whatever they are voting for) @dev Vote weight decays linearly over time. Lock time cannot be more than `MAXTIME` (4 years). # Voting escrow to have time-weighted votes # Votes have a weight depending on time, so that users are committed # to the future of (whatever they are voting for). # The weight in this implementation is linear, and lock cannot be more than maxtime: # w ^ # 1 + / # | / # | / # | / # |/ # 0 +--------+------> time # maxtime (4 years?) */ contract MAHAXLocker is ReentrancyGuard, INFTLocker, AccessControl, ERC2981 { IRegistry public override registry; uint256 internal constant WEEK = 1 weeks; uint256 internal constant MAXTIME = 4 * 365 * 86400; int128 internal constant iMAXTIME = 4 * 365 * 86400; uint256 internal constant MULTIPLIER = 1 ether; bool public inBootstrapMode = true; ITokenURIGenerator public renderingContract; uint256 public supply; mapping(uint256 => LockedBalance) public locked; mapping(uint256 => uint256) public ownershipChange; uint256 public epoch; mapping(uint256 => Point) public pointHistory; // epoch -> unsigned point mapping(uint256 => Point[1000000000]) public userPointHistory; // user -> Point[userEpoch] mapping(uint256 => uint256) public userPointEpoch; mapping(uint256 => int128) public slopeChanges; // time -> signed slope change string public constant name = "Locked MAHA NFT"; string public constant symbol = "MAHAX"; string public constant version = "1.0.0"; uint8 public constant decimals = 18; uint256 public minLockAmount = 99 * 1e18; /// @dev Current count of token uint256 internal tokenId; /// @dev Mapping from NFT ID to the address that owns it. mapping(uint256 => address) internal idToOwner; /// @dev Mapping from NFT ID to approved address. mapping(uint256 => address) internal idToApprovals; /// @dev Mapping from owner address to count of his tokens. mapping(address => uint256) internal ownerToNFTokenCount; /// @dev Mapping from owner address to mapping of index to tokenIds mapping(address => mapping(uint256 => uint256)) internal ownerToNFTokenIdList; /// @dev Mapping from NFT ID to index of owner mapping(uint256 => uint256) internal tokenToOwnerIndex; /// @dev Mapping from owner address to mapping of operator addresses. mapping(address => mapping(address => bool)) internal ownerToOperators; bytes32 public constant MIGRATION_ROLE = keccak256("MIGRATION_ROLE"); modifier onlyGovernance() { require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "not governance"); _; } modifier onlyMigrator() { require(hasRole(MIGRATION_ROLE, msg.sender), "not migrator"); _; } constructor( address _registry, address _royaltyRcv, address _renderingContract, uint96 _royaltyFeeNumerator ) { registry = IRegistry(_registry); pointHistory[0].blk = block.number; pointHistory[0].ts = block.timestamp; _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); _setupRole(MIGRATION_ROLE, msg.sender); _setDefaultRoyalty(_royaltyRcv, _royaltyFeeNumerator); renderingContract = ITokenURIGenerator(_renderingContract); } /// @dev Interface identification is specified in ERC-165. /// @param _interfaceID Id of the interface function supportsInterface(bytes4 _interfaceID) public view override(ERC2981, IERC165, AccessControl) returns (bool) { return bytes4(0x01ffc9a7) == _interfaceID || // ERC165 bytes4(0x80ac58cd) == _interfaceID || // ERC721 bytes4(0x5b5e139f) == _interfaceID || // ERC721Metadata super.supportsInterface(_interfaceID); } function totalSupplyWithoutDecay() external view override returns (uint256) { return supply; } /// @notice Get the most recently recorded rate of voting power decrease for `_tokenId` /// @param _tokenId token of the NFT /// @return Value of the slope function getLastUserSlope(uint256 _tokenId) external view returns (int128) { uint256 uepoch = userPointEpoch[_tokenId]; return userPointHistory[_tokenId][uepoch].slope; } /// @notice Get the timestamp for checkpoint `_idx` for `_tokenId` /// @param _tokenId token of the NFT /// @param _idx User epoch number /// @return Epoch time of the checkpoint function userPointHistoryTs(uint256 _tokenId, uint256 _idx) external view returns (uint256) { return userPointHistory[_tokenId][_idx].ts; } /// @notice Get timestamp when `_tokenId`'s lock finishes /// @param _tokenId User NFT /// @return Epoch time of the lock end function lockedEnd(uint256 _tokenId) external view returns (uint256) { return locked[_tokenId].end; } /// @dev Returns the number of NFTs owned by `_owner`. /// Throws if `_owner` is the zero address. NFTs assigned to the zero address are considered invalid. /// @param _owner Address for whom to query the balance. function _balance(address _owner) internal view returns (uint256) { return ownerToNFTokenCount[_owner]; } /// @dev Returns the number of NFTs owned by `_owner`. /// Throws if `_owner` is the zero address. NFTs assigned to the zero address are considered invalid. /// @param _owner Address for whom to query the balance. function balanceOf(address _owner) external view override returns (uint256) { return _balance(_owner); } /// @dev Returns the address of the owner of the NFT. /// @param _tokenId The identifier for an NFT. function _ownerOf(uint256 _tokenId) internal view returns (address) { return idToOwner[_tokenId]; } /// @dev Returns the address of the owner of the NFT. /// @param _tokenId The identifier for an NFT. function ownerOf(uint256 _tokenId) external view override returns (address) { return _ownerOf(_tokenId); } /// @dev Returns the voting power of the `_owner`. /// Throws if `_owner` is the zero address. NFTs assigned to the zero address are considered invalid. /// @param _owner Address for whom to query the voting power of. function votingPowerOf(address _owner) external view returns (uint256 _power) { for (uint256 index = 0; index < ownerToNFTokenCount[_owner]; index++) { uint256 _tokenId = ownerToNFTokenIdList[_owner][index]; _power += _balanceOfNFT(_tokenId, block.timestamp); } } /// @dev Get the approved address for a single NFT. /// @param _tokenId ID of the NFT to query the approval of. function getApproved(uint256 _tokenId) external view override returns (address) { return idToApprovals[_tokenId]; } /// @dev Checks if `_operator` is an approved operator for `_owner`. /// @param _owner The address that owns the NFTs. /// @param _operator The address that acts on behalf of the owner. function isApprovedForAll(address _owner, address _operator) external view override returns (bool) { return (ownerToOperators[_owner])[_operator]; } /// @dev Get token by index function tokenOfOwnerByIndex(address _owner, uint256 _tokenIndex) external view returns (uint256) { return ownerToNFTokenIdList[_owner][_tokenIndex]; } /// @dev Returns whether the given spender can transfer a given token ID /// @param _spender address of the spender to query /// @param _tokenId uint ID of the token to be transferred /// @return bool whether the msg.sender is approved for the given token ID, is an operator of the owner, or is the owner of the token function _isApprovedOrOwner(address _spender, uint256 _tokenId) internal view returns (bool) { address owner = idToOwner[_tokenId]; bool spenderIsOwner = owner == _spender; bool spenderIsApproved = _spender == idToApprovals[_tokenId]; bool spenderIsApprovedForAll = (ownerToOperators[owner])[_spender]; return spenderIsOwner || spenderIsApproved || spenderIsApprovedForAll; } function isApprovedOrOwner(address _spender, uint256 _tokenId) external view override returns (bool) { return _isApprovedOrOwner(_spender, _tokenId); } /// @dev Add a NFT to an index mapping to a given address /// @param _to address of the receiver /// @param _tokenId uint ID Of the token to be added function _addTokenToOwnerList(address _to, uint256 _tokenId) internal { uint256 currentCount = _balance(_to); ownerToNFTokenIdList[_to][currentCount] = _tokenId; tokenToOwnerIndex[_tokenId] = currentCount; } /// @dev Remove a NFT from an index mapping to a given address /// @param _from address of the sender /// @param _tokenId uint ID Of the token to be removed function _removeTokenFromOwnerList(address _from, uint256 _tokenId) internal { // Delete uint256 currentCount = _balance(_from) - 1; uint256 currentIndex = tokenToOwnerIndex[_tokenId]; if (currentCount == currentIndex) { // update ownerToNFTokenIdList ownerToNFTokenIdList[_from][currentCount] = 0; // update tokenToOwnerIndex tokenToOwnerIndex[_tokenId] = 0; } else { uint256 lastTokenId = ownerToNFTokenIdList[_from][currentCount]; // Add // update ownerToNFTokenIdList ownerToNFTokenIdList[_from][currentIndex] = lastTokenId; // update tokenToOwnerIndex tokenToOwnerIndex[lastTokenId] = currentIndex; // Delete // update ownerToNFTokenIdList ownerToNFTokenIdList[_from][currentCount] = 0; // update tokenToOwnerIndex tokenToOwnerIndex[_tokenId] = 0; } } /// @dev Add a NFT to a given address /// Throws if `_tokenId` is owned by someone. function _addTokenTo(address _to, uint256 _tokenId) internal { // Throws if `_tokenId` is owned by someone assert(idToOwner[_tokenId] == address(0)); // Change the owner idToOwner[_tokenId] = _to; // Update owner token index tracking _addTokenToOwnerList(_to, _tokenId); // Change count tracking ownerToNFTokenCount[_to] += 1; } /// @dev Remove a NFT from a given address /// Throws if `_from` is not the current owner. function _removeTokenFrom(address _from, uint256 _tokenId) internal { // Throws if `_from` is not the current owner assert(idToOwner[_tokenId] == _from); // Change the owner idToOwner[_tokenId] = address(0); // Update owner token index tracking _removeTokenFromOwnerList(_from, _tokenId); // Change count tracking ownerToNFTokenCount[_from] -= 1; } /// @dev Clear an approval of a given address /// Throws if `_owner` is not the current owner. function _clearApproval(address _owner, uint256 _tokenId) internal { // Throws if `_owner` is not the current owner assert(idToOwner[_tokenId] == _owner); if (idToApprovals[_tokenId] != address(0)) { // Reset approvals idToApprovals[_tokenId] = address(0); } } /// @dev Exeute transfer of a NFT. /// Throws unless `msg.sender` is the current owner, an authorized operator, or the approved /// address for this NFT. (NOTE: `msg.sender` not allowed in internal function so pass `_sender`.) /// Throws if `_to` is the zero address. /// Throws if `_from` is not the current owner. /// Throws if `_tokenId` is not a valid NFT. function _transferFrom( address _from, address _to, uint256 _tokenId, address _sender ) internal { // Check requirements require(!_isStaked(_tokenId), "staked"); require(_isApprovedOrOwner(_sender, _tokenId), "not approved sender"); // Clear approval. Throws if `_from` is not the current owner _clearApproval(_from, _tokenId); // Remove NFT. Throws if `_tokenId` is not a valid NFT _removeTokenFrom(_from, _tokenId); // Add NFT _addTokenTo(_to, _tokenId); // Set the block of ownership transfer (for Flash NFT protection) ownershipChange[_tokenId] = block.number; // Log the transfer emit Transfer(_from, _to, _tokenId); } /* TRANSFER FUNCTIONS */ /// @dev Throws unless `msg.sender` is the current owner, an authorized operator, or the approved address for this NFT. /// Throws if `_from` is not the current owner. /// Throws if `_to` is the zero address. /// Throws if `_tokenId` is not a valid NFT. /// @notice The caller is responsible to confirm that `_to` is capable of receiving NFTs or else /// they maybe be permanently lost. /// @param _from The current owner of the NFT. /// @param _to The new owner. /// @param _tokenId The NFT to transfer. function transferFrom( address _from, address _to, uint256 _tokenId ) external override { _transferFrom(_from, _to, _tokenId, msg.sender); } function _isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /// @dev Transfers the ownership of an NFT from one address to another address. /// Throws unless `msg.sender` is the current owner, an authorized operator, or the /// approved address for this NFT. /// Throws if `_from` is not the current owner. /// Throws if `_to` is the zero address. /// Throws if `_tokenId` is not a valid NFT. /// If `_to` is a smart contract, it calls `onERC721Received` on `_to` and throws if /// the return value is not `bytes4(keccak256("onERC721Received(address,address,uint,bytes)"))`. /// @param _from The current owner of the NFT. /// @param _to The new owner. /// @param _tokenId The NFT to transfer. /// @param _data Additional data with no specified format, sent in call to `_to`. function safeTransferFrom( address _from, address _to, uint256 _tokenId, bytes memory _data ) public override { _transferFrom(_from, _to, _tokenId, msg.sender); if (_isContract(_to)) { // Throws if transfer destination is a contract which does not implement 'onERC721Received' try IERC721Receiver(_to).onERC721Received( msg.sender, _from, _tokenId, _data ) returns (bytes4) {} catch (bytes memory reason) { if (reason.length == 0) { revert( "ERC721: transfer to non ERC721Receiver implementer" ); } else { assembly { revert(add(32, reason), mload(reason)) } } } } } /// @dev Transfers the ownership of an NFT from one address to another address. /// Throws unless `msg.sender` is the current owner, an authorized operator, or the /// approved address for this NFT. /// Throws if `_from` is not the current owner. /// Throws if `_to` is the zero address. /// Throws if `_tokenId` is not a valid NFT. /// If `_to` is a smart contract, it calls `onERC721Received` on `_to` and throws if /// the return value is not `bytes4(keccak256("onERC721Received(address,address,uint,bytes)"))`. /// @param _from The current owner of the NFT. /// @param _to The new owner. /// @param _tokenId The NFT to transfer. function safeTransferFrom( address _from, address _to, uint256 _tokenId ) external override { safeTransferFrom(_from, _to, _tokenId, ""); } /// @dev Set or reaffirm the approved address for an NFT. The zero address indicates there is no approved address. /// Throws unless `msg.sender` is the current NFT owner, or an authorized operator of the current owner. /// Throws if `_tokenId` is not a valid NFT. (NOTE: This is not written the EIP) /// Throws if `_approved` is the current owner. (NOTE: This is not written the EIP) /// @param _approved Address to be approved for the given NFT ID. /// @param _tokenId ID of the token to be approved. function _approve(address _approved, uint256 _tokenId) internal { address owner = idToOwner[_tokenId]; // Throws if `_tokenId` is not a valid NFT require(owner != address(0), "owner is 0x0"); // Throws if `_approved` is the current owner require(_approved != owner, "not owner"); // Check requirements bool senderIsOwner = (idToOwner[_tokenId] == msg.sender); bool senderIsApprovedForAll = (ownerToOperators[owner])[msg.sender]; require(senderIsOwner || senderIsApprovedForAll, "invalid sender"); // Set the approval idToApprovals[_tokenId] = _approved; emit Approval(owner, _approved, _tokenId); } /// @dev Set or reaffirm the approved address for an NFT. The zero address indicates there is no approved address. /// Throws unless `msg.sender` is the current NFT owner, or an authorized operator of the current owner. /// Throws if `_tokenId` is not a valid NFT. (NOTE: This is not written the EIP) /// Throws if `_approved` is the current owner. (NOTE: This is not written the EIP) /// @param _approved Address to be approved for the given NFT ID. /// @param _tokenId ID of the token to be approved. function approve(address _approved, uint256 _tokenId) external override { _approve(_approved, _tokenId); } /// @dev Enables or disables approval for a third party ("operator") to manage all of /// `msg.sender`'s assets. It also emits the ApprovalForAll event. /// Throws if `_operator` is the `msg.sender`. (NOTE: This is not written the EIP) /// @notice This works even if sender doesn't own any tokens at the time. /// @param _operator Address to add to the set of authorized operators. /// @param _approved True if the operators is approved, false to revoke approval. function setApprovalForAll(address _operator, bool _approved) external override { // Throws if `_operator` is the `msg.sender` assert(_operator != msg.sender); ownerToOperators[msg.sender][_operator] = _approved; emit ApprovalForAll(msg.sender, _operator, _approved); } /// @dev Function to mint tokens /// Throws if `_to` is zero address. /// Throws if `_tokenId` is owned by someone. /// @param _to The address that will receive the minted tokens. /// @param _tokenId The token id to mint. /// @return A boolean that indicates if the operation was successful. function _mint(address _to, uint256 _tokenId) internal returns (bool) { // Throws if `_to` is zero address assert(_to != address(0)); // Add NFT. Throws if `_tokenId` is owned by someone _addTokenTo(_to, _tokenId); emit Transfer(address(0), _to, _tokenId); return true; } /// @notice Record global and per-user data to checkpoint /// @param _tokenId NFT token ID. No user checkpoint if 0 /// @param oldLocked Pevious locked amount / end lock time for the user /// @param newLocked New locked amount / end lock time for the user function _checkpoint( uint256 _tokenId, LockedBalance memory oldLocked, LockedBalance memory newLocked ) internal { Point memory uOld; Point memory uNew; int128 oldDslope = 0; int128 newDslope = 0; uint256 _epoch = epoch; if (_tokenId != 0) { // Calculate slopes and biases // Kept at zero when they have to if (oldLocked.end > block.timestamp && oldLocked.amount > 0) { uOld.slope = oldLocked.amount / iMAXTIME; uOld.bias = uOld.slope * int128(int256(oldLocked.end - block.timestamp)); } if (newLocked.end > block.timestamp && newLocked.amount > 0) { uNew.slope = newLocked.amount / iMAXTIME; uNew.bias = uNew.slope * int128(int256(newLocked.end - block.timestamp)); } // Read values of scheduled changes in the slope // oldLocked.end can be in the past and in the future // newLocked.end can ONLY by in the FUTURE unless everything expired: than zeros oldDslope = slopeChanges[oldLocked.end]; if (newLocked.end != 0) { if (newLocked.end == oldLocked.end) { newDslope = oldDslope; } else { newDslope = slopeChanges[newLocked.end]; } } } Point memory lastPoint = Point({ bias: 0, slope: 0, ts: block.timestamp, blk: block.number }); if (_epoch > 0) { lastPoint = pointHistory[_epoch]; } uint256 lastCheckpoint = lastPoint.ts; // initialLastPoint is used for extrapolation to calculate block number // (approximately, for *At methods) and save them // as we cannot figure that out exactly from inside the contract Point memory initialLastPoint = lastPoint; uint256 blockSlope = 0; // dblock/dt if (block.timestamp > lastPoint.ts) { blockSlope = (MULTIPLIER * (block.number - lastPoint.blk)) / (block.timestamp - lastPoint.ts); } // If last point is already recorded in this block, slope=0 // But that's ok b/c we know the block in such case // Go over weeks to fill history and calculate what the current point is { uint256 tI = (lastCheckpoint / WEEK) * WEEK; for (uint256 i = 0; i < 255; ++i) { // Hopefully it won't happen that this won't get used in 5 years! // If it does, users will be able to withdraw but vote weight will be broken tI += WEEK; int128 dSlope = 0; if (tI > block.timestamp) { tI = block.timestamp; } else { dSlope = slopeChanges[tI]; } lastPoint.bias -= lastPoint.slope * int128(int256(tI - lastCheckpoint)); lastPoint.slope += dSlope; if (lastPoint.bias < 0) { // This can happen lastPoint.bias = 0; } if (lastPoint.slope < 0) { // This cannot happen - just in case lastPoint.slope = 0; } lastCheckpoint = tI; lastPoint.ts = tI; lastPoint.blk = initialLastPoint.blk + (blockSlope * (tI - initialLastPoint.ts)) / MULTIPLIER; _epoch += 1; if (tI == block.timestamp) { lastPoint.blk = block.number; break; } else { pointHistory[_epoch] = lastPoint; } } } epoch = _epoch; // Now pointHistory is filled until t=now if (_tokenId != 0) { // If last point was in this block, the slope change has been applied already // But in such case we have 0 slope(s) lastPoint.slope += (uNew.slope - uOld.slope); lastPoint.bias += (uNew.bias - uOld.bias); if (lastPoint.slope < 0) { lastPoint.slope = 0; } if (lastPoint.bias < 0) { lastPoint.bias = 0; } } // Record the changed point into history pointHistory[_epoch] = lastPoint; if (_tokenId != 0) { // Schedule the slope changes (slope is going down) // We subtract new_user_slope from [newLocked.end] // and add old_user_slope to [oldLocked.end] if (oldLocked.end > block.timestamp) { // oldDslope was <something> - uOld.slope, so we cancel that oldDslope += uOld.slope; if (newLocked.end == oldLocked.end) { oldDslope -= uNew.slope; // It was a new deposit, not extension } slopeChanges[oldLocked.end] = oldDslope; } if (newLocked.end > block.timestamp) { if (newLocked.end > oldLocked.end) { newDslope -= uNew.slope; // old slope disappeared at this point slopeChanges[newLocked.end] = newDslope; } // else: we recorded it already in oldDslope } // Now handle user history uint256 userEpoch = userPointEpoch[_tokenId] + 1; userPointEpoch[_tokenId] = userEpoch; uNew.ts = block.timestamp; uNew.blk = block.number; userPointHistory[_tokenId][userEpoch] = uNew; } } /// @notice Deposit and lock tokens for a user /// @param _tokenId NFT that holds lock /// @param _value Amount to deposit /// @param unlockTime New time when to unlock the tokens, or 0 if unchanged /// @param lockedBalance Previous locked amount / timestamp /// @param depositType The type of deposit function _depositFor( uint256 _tokenId, uint256 _value, uint256 unlockTime, LockedBalance memory lockedBalance, DepositType depositType, bool _shouldPullUserMaha, bool _stakeNFT ) internal { registry.ensureNotPaused(); LockedBalance memory _locked = lockedBalance; uint256 supplyBefore = supply; supply = supplyBefore + _value; LockedBalance memory oldLocked; (oldLocked.amount, oldLocked.end) = (_locked.amount, _locked.end); // Adding to existing lock, or if a lock is expired - creating a new one _locked.amount += int128(int256(_value)); if (unlockTime != 0) { _locked.end = unlockTime; } if (depositType == DepositType.CREATE_LOCK_TYPE) { _locked.start = block.timestamp; } locked[_tokenId] = _locked; // Possibilities: // Both oldLocked.end could be current or expired (>/< block.timestamp) // value == 0 (extend lock) or value > 0 (add to lock or extend lock) // _locked.end > block.timestamp (always) _checkpoint(_tokenId, oldLocked, _locked); address from = msg.sender; if ( _value != 0 && depositType != DepositType.MERGE_TYPE && _shouldPullUserMaha ) { assert( IERC20(registry.maha()).transferFrom( from, address(this), _value ) ); } if (_stakeNFT) INFTStaker(registry.staker())._stakeFromLock(_tokenId); emit Deposit( from, _tokenId, _value, _locked.end, depositType, block.timestamp ); emit Supply(supplyBefore, supplyBefore + _value); } function merge(uint256 _from, uint256 _to) external override { require(!_isStaked(_from), "from staked"); require(!_isStaked(_to), "to staked"); require(_from != _to, "same nft"); require(_isApprovedOrOwner(msg.sender, _from), "from not approved"); require(_isApprovedOrOwner(msg.sender, _to), "to not approved"); LockedBalance memory _locked0 = locked[_from]; LockedBalance memory _locked1 = locked[_to]; uint256 value0 = uint256(int256(_locked0.amount)); uint256 end = _locked0.end >= _locked1.end ? _locked0.end : _locked1.end; locked[_from] = LockedBalance(0, 0, 0); _checkpoint(_from, _locked0, LockedBalance(0, 0, 0)); _burn(_from); _depositFor( _to, value0, end, _locked1, DepositType.MERGE_TYPE, true, false ); } function blockNumber() external view override returns (uint256) { return block.number; } /// @notice Record global data to checkpoint function checkpoint() external override { _checkpoint(0, LockedBalance(0, 0, 0), LockedBalance(0, 0, 0)); } /// @notice Deposit `_value` tokens for `_tokenId` and add to the lock /// @dev Anyone (even a smart contract) can deposit for someone else, but /// cannot extend their locktime and deposit for a brand new user /// @param _tokenId lock NFT /// @param _value Amount to add to user's lock function depositFor(uint256 _tokenId, uint256 _value) external override nonReentrant { LockedBalance memory _locked = locked[_tokenId]; require(!_isStaked(_tokenId), "staked"); require(_value > 0, "value = 0"); // dev: need non-zero value require(_locked.amount > 0, "No existing lock found"); require(_locked.end > block.timestamp, "Cannot add to expired lock."); _depositFor( _tokenId, _value, 0, _locked, DepositType.DEPOSIT_FOR_TYPE, true, false ); } /// @notice Deposit `_value` tokens for `_to` and lock for `_lockDuration` /// @param _value Amount to deposit /// @param _lockDuration Number of seconds to lock tokens for (rounded down to nearest week) /// @param _to Address to deposit /// @param _shouldPullUserMaha Should we pull maha with the lock /// @param _stakeNFT should we stake into the staking contract function _createLock( uint256 _value, uint256 _lockDuration, address _to, bool _shouldPullUserMaha, bool _stakeNFT ) internal returns (uint256) { registry.ensureNotPaused(); uint256 unlockTime = ((block.timestamp + _lockDuration) / WEEK) * WEEK; // Locktime is rounded down to weeks require(_value > 0, "value = 0"); // dev: need non-zero value require(unlockTime > block.timestamp, "Can only lock in the future"); require( unlockTime <= block.timestamp + MAXTIME, "Voting lock can be 4 years max" ); ++tokenId; uint256 _tokenId = tokenId; _mint(_to, _tokenId); _depositFor( _tokenId, _value, unlockTime, locked[_tokenId], DepositType.CREATE_LOCK_TYPE, _shouldPullUserMaha, _stakeNFT ); require( _balanceOfNFT(_tokenId, block.timestamp) >= minLockAmount, "min amount for nft not met" ); return _tokenId; } /// @notice Deposit `_value` tokens for `_to` and lock for `_lockDuration` /// @param _value Amount to deposit /// @param _lockDuration Number of seconds to lock tokens for (rounded down to nearest week) /// @param _to Address to deposit function createLockFor( uint256 _value, uint256 _lockDuration, address _to, bool _stakeNFT ) external override nonReentrant returns (uint256) { return _createLock(_value, _lockDuration, _to, true, _stakeNFT); } function migrateTokenFor( uint256 _value, uint256 _lockDuration, address _to ) external override onlyMigrator returns (uint256) { return _createLock(_value, _lockDuration, _to, false, true); } /// @notice Deposit `_value` tokens for `msg.sender` and lock for `_lockDuration` /// @param _value Amount to deposit /// @param _lockDuration Number of seconds to lock tokens for (rounded down to nearest week) /// @param _stakeNFT Should we also stake the NFT as well? function createLock( uint256 _value, uint256 _lockDuration, bool _stakeNFT ) external override nonReentrant returns (uint256) { return _createLock(_value, _lockDuration, msg.sender, true, _stakeNFT); } /// @notice Upload users. /// @param _users The users for whose lock is to be added. /// @param _value The values for users. /// @param _lockDuration The lock duration for users. function uploadUsers( address[] memory _users, uint256[] memory _value, uint256[] memory _lockDuration, bool _stakeNFT ) external onlyMigrator { require(_value.length == _lockDuration.length, "invalid data"); require(_users.length == _value.length, "invalid data"); for (uint256 i = 0; i < _users.length; i++) { _createLock( _value[i], _lockDuration[i], _users[i], false, _stakeNFT ); } } /// @notice Sets the royalty info for all NFT marketplaces /// @param _royaltyRcv The address to recieve royalties /// @param _royaltyFeeNumerator The amount of royalty to recieve function setRoyaltyInfo(address _royaltyRcv, uint96 _royaltyFeeNumerator) external onlyGovernance { _setDefaultRoyalty(_royaltyRcv, _royaltyFeeNumerator); } /// @notice Sets the min amount to lock /// @param _minLockAmount The min amount to lock function setMinLockAmount(uint256 _minLockAmount) external onlyGovernance { minLockAmount = _minLockAmount; } /// @notice Deposit `_value` additional tokens for `_tokenId` without modifying the unlock time /// @param _value Amount of tokens to deposit and add to the lock function increaseAmount(uint256 _tokenId, uint256 _value) external nonReentrant { require( _isApprovedOrOwner(msg.sender, _tokenId), "caller is not owner nor approved" ); LockedBalance memory _locked = locked[_tokenId]; assert(_value > 0); // dev: need non-zero value require(_locked.amount > 0, "No existing lock found"); require(_locked.end > block.timestamp, "Cannot add to expired lock."); _depositFor( _tokenId, _value, 0, _locked, DepositType.INCREASE_LOCK_AMOUNT, true, _isStaked(_tokenId) ); } /// @notice Extend the unlock time for `_tokenId` /// @param _lockDuration New number of seconds until tokens unlock function increaseUnlockTime(uint256 _tokenId, uint256 _lockDuration) external nonReentrant { require( _isApprovedOrOwner(msg.sender, _tokenId), "caller is not owner nor approved" ); LockedBalance memory _locked = locked[_tokenId]; uint256 unlockTime = ((block.timestamp + _lockDuration) / WEEK) * WEEK; // Locktime is rounded down to weeks require(_locked.end > block.timestamp, "Lock expired"); require(_locked.amount > 0, "Nothing is locked"); require(unlockTime > _locked.end, "Can only increase lock duration"); require( unlockTime <= block.timestamp + MAXTIME, "Voting lock can be 4 years max" ); require( unlockTime <= _locked.start + MAXTIME, "Voting lock can be 4 years max" ); _depositFor( _tokenId, 0, unlockTime, _locked, DepositType.INCREASE_UNLOCK_TIME, false, _isStaked(_tokenId) ); } /// @notice Withdraw all tokens for `_tokenId` /// @dev Only possible if the lock has expired function withdraw(uint256 _tokenId) external nonReentrant { require( _isApprovedOrOwner(msg.sender, _tokenId), "caller is not owner nor approved" ); require(!_isStaked(_tokenId), "staked"); LockedBalance memory _locked = locked[_tokenId]; require(block.timestamp >= _locked.end, "The lock didn't expire"); uint256 value = uint256(int256(_locked.amount)); locked[_tokenId] = LockedBalance(0, 0, 0); uint256 supplyBefore = supply; supply = supplyBefore - value; // oldLocked can have either expired <= timestamp or zero end // _locked has only 0 end // Both can have >= 0 amount _checkpoint(_tokenId, _locked, LockedBalance(0, 0, 0)); assert(IERC20(registry.maha()).transfer(msg.sender, value)); // Burn the NFT _burn(_tokenId); emit Withdraw(msg.sender, _tokenId, value, block.timestamp); emit Supply(supplyBefore, supplyBefore - value); } /// @notice Sets the optional tokenURI override contract. function setRenderingContract(ITokenURIGenerator _contract) external onlyGovernance { renderingContract = _contract; } /// @notice If renderingContract is set then returns its tokenURI(tokenId) /// return value, otherwise returns the standard baseTokenURI + tokenId. function tokenURI(uint256 _tokenId) public view returns (string memory) { return renderingContract.tokenURI(_tokenId); } // The following ERC20/minime-compatible methods are not real balanceOf and supply! // They measure the weights for the purpose of voting, so they don't represent // real coins. /// @notice Binary search to estimate timestamp for block number /// @param _block Block to find /// @param maxEpoch Don't go beyond this epoch /// @return Approximate timestamp for block function _findBlockEpoch(uint256 _block, uint256 maxEpoch) internal view returns (uint256) { // Binary search uint256 _min = 0; uint256 _max = maxEpoch; for (uint256 i = 0; i < 128; ++i) { // Will be always enough for 128-bit numbers if (_min >= _max) { break; } uint256 _mid = (_min + _max + 1) / 2; if (pointHistory[_mid].blk <= _block) { _min = _mid; } else { _max = _mid - 1; } } return _min; } /// @notice Get the current voting power for `_tokenId` /// @dev Adheres to the ERC20 `balanceOf` interface for Aragon compatibility /// @param _tokenId NFT for lock /// @param _t Epoch time to return voting power at /// @return User voting power function _balanceOfNFT(uint256 _tokenId, uint256 _t) internal view returns (uint256) { uint256 _epoch = userPointEpoch[_tokenId]; if (_epoch == 0) { return 0; } else { Point memory lastPoint = userPointHistory[_tokenId][_epoch]; lastPoint.bias -= lastPoint.slope * int128(int256(_t) - int256(lastPoint.ts)); if (lastPoint.bias < 0) { lastPoint.bias = 0; } return uint256(int256(lastPoint.bias)); } } function balanceOfNFT(uint256 _tokenId) external view override returns (uint256) { if (ownershipChange[_tokenId] == block.number) return 0; return _balanceOfNFT(_tokenId, block.timestamp); } function balanceOfNFTAt(uint256 _tokenId, uint256 _t) external view returns (uint256) { return _balanceOfNFT(_tokenId, _t); } /// @notice Measure voting power of `_tokenId` at block height `_block` /// @dev Adheres to MiniMe `balanceOfAt` interface: https://github.com/Giveth/minime /// @param _tokenId User's wallet NFT /// @param _block Block to calculate the voting power at /// @return Voting power function _balanceOfAtNFT(uint256 _tokenId, uint256 _block) internal view returns (uint256) { // Copying and pasting totalSupply code because Vyper cannot pass by // reference yet assert(_block <= block.number); // Binary search uint256 _min = 0; uint256 _max = userPointEpoch[_tokenId]; for (uint256 i = 0; i < 128; ++i) { // Will be always enough for 128-bit numbers if (_min >= _max) { break; } uint256 _mid = (_min + _max + 1) / 2; if (userPointHistory[_tokenId][_mid].blk <= _block) { _min = _mid; } else { _max = _mid - 1; } } Point memory upoint = userPointHistory[_tokenId][_min]; uint256 maxEpoch = epoch; uint256 _epoch = _findBlockEpoch(_block, maxEpoch); Point memory point0 = pointHistory[_epoch]; uint256 dBlock = 0; uint256 dT = 0; if (_epoch < maxEpoch) { Point memory point1 = pointHistory[_epoch + 1]; dBlock = point1.blk - point0.blk; dT = point1.ts - point0.ts; } else { dBlock = block.number - point0.blk; dT = block.timestamp - point0.ts; } uint256 blockTime = point0.ts; if (dBlock != 0) { blockTime += (dT * (_block - point0.blk)) / dBlock; } upoint.bias -= upoint.slope * int128(int256(blockTime - upoint.ts)); if (upoint.bias >= 0) { return uint256(uint128(upoint.bias)); } else { return 0; } } function balanceOfAtNFT(uint256 _tokenId, uint256 _block) external view returns (uint256) { return _balanceOfAtNFT(_tokenId, _block); } /// @notice Calculate total voting power at some point in the past /// @param point The point (bias/slope) to start search from /// @param t Time to calculate the total voting power at /// @return Total voting power at that time function _supplyAt(Point memory point, uint256 t) internal view returns (uint256) { Point memory lastPoint = point; uint256 tI = (lastPoint.ts / WEEK) * WEEK; for (uint256 i = 0; i < 255; ++i) { tI += WEEK; int128 dSlope = 0; if (tI > t) { tI = t; } else { dSlope = slopeChanges[tI]; } lastPoint.bias -= lastPoint.slope * int128(int256(tI - lastPoint.ts)); if (tI == t) { break; } lastPoint.slope += dSlope; lastPoint.ts = tI; } if (lastPoint.bias < 0) { lastPoint.bias = 0; } return uint256(uint128(lastPoint.bias)); } /// @notice Calculate total voting power /// @dev Adheres to the ERC20 `totalSupply` interface for Aragon compatibility /// @return Total voting power function totalSupplyAtT(uint256 t) public view returns (uint256) { uint256 _epoch = epoch; Point memory lastPoint = pointHistory[_epoch]; return _supplyAt(lastPoint, t); } function totalSupply() external view override returns (uint256) { return totalSupplyAtT(block.timestamp); } /// @notice Calculate total voting power at some point in the past /// @param _block Block to calculate the total voting power at /// @return Total voting power at `_block` function totalSupplyAt(uint256 _block) external view override returns (uint256) { assert(_block <= block.number); uint256 _epoch = epoch; uint256 targetEpoch = _findBlockEpoch(_block, _epoch); Point memory point = pointHistory[targetEpoch]; uint256 dt = 0; if (targetEpoch < _epoch) { Point memory pointNext = pointHistory[targetEpoch + 1]; if (point.blk != pointNext.blk) { dt = ((_block - point.blk) * (pointNext.ts - point.ts)) / (pointNext.blk - point.blk); } } else { if (point.blk != block.number) { dt = ((_block - point.blk) * (block.timestamp - point.ts)) / (block.number - point.blk); } } // Now dt contains info on how far are we beyond point return _supplyAt(point, point.ts + dt); } /// @dev A refund code that triggers a refund of maha; only used for the bootstrapping period of the DAO function emergencyRefund(address to) external onlyGovernance { require(inBootstrapMode, "not in bootstrap mode"); IERC20(registry.maha()).transfer( to, IERC20(registry.maha()).balanceOf(address(this)) ); } /// @dev stop the bootstrap mode that allows governance to take all the maha out function stopBootstrapMode() external onlyGovernance { inBootstrapMode = false; } function _burn(uint256 _tokenId) internal { require( _isApprovedOrOwner(msg.sender, _tokenId), "caller is not owner nor approved" ); address owner = _ownerOf(_tokenId); // Clear approval _approve(address(0), _tokenId); // Remove token _removeTokenFrom(msg.sender, _tokenId); emit Transfer(owner, address(0), _tokenId); } function isStaked(uint256 _tokenId) external view override returns (bool) { return _isStaked(_tokenId); } function _isStaked(uint256 _tokenId) internal view returns (bool) { return INFTStaker(registry.staker()).isStaked(_tokenId); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol) pragma solidity ^0.8.0; import "../token/ERC20/IERC20.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/common/ERC2981.sol) pragma solidity ^0.8.0; import "../../interfaces/IERC2981.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information. * * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first. * * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the * fee is specified in basis points by default. * * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported. * * _Available since v4.5._ */ abstract contract ERC2981 is IERC2981, ERC165 { struct RoyaltyInfo { address receiver; uint96 royaltyFraction; } RoyaltyInfo private _defaultRoyaltyInfo; mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) { return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId); } /** * @inheritdoc IERC2981 */ function royaltyInfo(uint256 _tokenId, uint256 _salePrice) public view virtual override returns (address, uint256) { RoyaltyInfo memory royalty = _tokenRoyaltyInfo[_tokenId]; if (royalty.receiver == address(0)) { royalty = _defaultRoyaltyInfo; } uint256 royaltyAmount = (_salePrice * royalty.royaltyFraction) / _feeDenominator(); return (royalty.receiver, royaltyAmount); } /** * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an * override. */ function _feeDenominator() internal pure virtual returns (uint96) { return 10000; } /** * @dev Sets the royalty information that all ids in this contract will default to. * * Requirements: * * - `receiver` cannot be the zero address. * - `feeNumerator` cannot be greater than the fee denominator. */ function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual { require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice"); require(receiver != address(0), "ERC2981: invalid receiver"); _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator); } /** * @dev Removes default royalty information. */ function _deleteDefaultRoyalty() internal virtual { delete _defaultRoyaltyInfo; } /** * @dev Sets the royalty information for a specific token id, overriding the global default. * * Requirements: * * - `tokenId` must be already minted. * - `receiver` cannot be the zero address. * - `feeNumerator` cannot be greater than the fee denominator. */ function _setTokenRoyalty( uint256 tokenId, address receiver, uint96 feeNumerator ) internal virtual { require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice"); require(receiver != address(0), "ERC2981: Invalid parameters"); _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator); } /** * @dev Resets royalty information for the token id back to the global default. */ function _resetTokenRoyalty(uint256 tokenId) internal virtual { delete _tokenRoyaltyInfo[tokenId]; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC721Receiver.sol) pragma solidity ^0.8.0; import "../token/ERC721/IERC721Receiver.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (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(uint160(account), 20), " 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. */ 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. */ 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`. */ 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. * * [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. */ 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. */ 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 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 pragma solidity ^0.8.0; interface ITokenURIGenerator { function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IAccessControl} from "@openzeppelin/contracts/access/IAccessControl.sol"; interface IRegistry is IAccessControl { event MahaChanged(address indexed whom, address _old, address _new); event VoterChanged(address indexed whom, address _old, address _new); event LockerChanged(address indexed whom, address _old, address _new); event GovernorChanged(address indexed whom, address _old, address _new); event StakerChanged(address indexed whom, address _old, address _new); event EmissionControllerChanged( address indexed whom, address _old, address _new ); function maha() external view returns (address); function gaugeVoter() external view returns (address); function locker() external view returns (address); function staker() external view returns (address); function emissionController() external view returns (address); function governor() external view returns (address); function getAllAddresses() external view returns ( address, address, address, address, address ); function ensureNotPaused() external; function setMAHA(address _new) external; function setEmissionController(address _new) external; function setStaker(address _new) external; function setVoter(address _new) external; function setLocker(address _new) external; function setGovernor(address _new) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IERC721} from "@openzeppelin/contracts/interfaces/IERC721.sol"; import {IERC721Receiver} from "@openzeppelin/contracts/interfaces/IERC721Receiver.sol"; import {IRegistry} from "./IRegistry.sol"; interface INFTLocker is IERC721 { function registry() external view returns (IRegistry); function balanceOfNFT(uint256) external view returns (uint256); function isStaked(uint256) external view returns (bool); function totalSupplyWithoutDecay() external view returns (uint256); function isApprovedOrOwner(address, uint256) external view returns (bool); function totalSupply() external view returns (uint256); function totalSupplyAt(uint256 _block) external view returns (uint256); function merge(uint256 _from, uint256 _to) external; function blockNumber() external view returns (uint256); function checkpoint() external; function depositFor(uint256 _tokenId, uint256 _value) external; function createLockFor( uint256 _value, uint256 _lockDuration, address _to, bool _stakeNFT ) external returns (uint256); function migrateTokenFor( uint256 _value, uint256 _lockDuration, address _to ) external returns (uint256); function createLock( uint256 _value, uint256 _lockDuration, bool _stakeNFT ) external returns (uint256); enum DepositType { DEPOSIT_FOR_TYPE, CREATE_LOCK_TYPE, INCREASE_LOCK_AMOUNT, INCREASE_UNLOCK_TIME, MERGE_TYPE } struct Point { int128 bias; int128 slope; // # -dweight / dt uint256 ts; uint256 blk; // block } /* We cannot really do block numbers per se b/c slope is per time, not per block * and per block could be fairly bad b/c Ethereum changes blocktimes. * What we can do is to extrapolate ***At functions */ struct LockedBalance { int128 amount; uint256 end; uint256 start; } event Deposit( address indexed provider, uint256 tokenId, uint256 value, uint256 indexed locktime, DepositType deposit_type, uint256 ts ); event Withdraw( address indexed provider, uint256 tokenId, uint256 value, uint256 ts ); event Supply(uint256 prevSupply, uint256 supply); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IRegistry} from "./IRegistry.sol"; import {IVotes} from "@openzeppelin/contracts/governance/utils/IVotes.sol"; interface INFTStaker is IVotes { event Transfer(address indexed from, address indexed to, uint256 value); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function getStakedBalance(address who) external view returns (uint256); function registry() external view returns (IRegistry); function stake(uint256 _tokenId) external; function isStaked(uint256 _tokenId) external view returns (bool); function _stakeFromLock(uint256 _tokenId) external; function unstake(uint256 _tokenId) external; event StakeNFT( address indexed who, address indexed owner, uint256 tokenId, uint256 amount ); event UnstakeNFT( address indexed who, address indexed owner, uint256 tokenId, uint256 amount ); }
// 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 (last updated v4.6.0) (interfaces/IERC2981.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165.sol"; /** * @dev Interface for the NFT Royalty Standard. * * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal * support for royalty payments across all NFT marketplaces and ecosystem participants. * * _Available since v4.5._ */ interface IERC2981 is IERC165 { /** * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of * exchange. The royalty amount is denominated and should be paid in that same unit of exchange. */ function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount); }
// 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 (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); }
// 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 (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/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 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @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); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (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: balance query for the zero address"); 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: owner query for nonexistent token"); 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) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); 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 owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); 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: transfer caller is not owner nor 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: transfer caller is not owner nor 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) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); 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. * * 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 _approve(address(0), 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 _approve(address(0), 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 a {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 a {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 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 { 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 (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/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 be 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 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 v4.5.0) (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 functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC721.sol) pragma solidity ^0.8.0; import "../token/ERC721/IERC721.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (governance/utils/IVotes.sol) pragma solidity ^0.8.0; /** * @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts. * * _Available since v4.5._ */ interface IVotes { /** * @dev Emitted when an account changes their delegate. */ event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /** * @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes. */ event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance); /** * @dev Returns the current amount of votes that `account` has. */ function getVotes(address account) external view returns (uint256); /** * @dev Returns the amount of votes that `account` had at the end of a past block (`blockNumber`). */ function getPastVotes(address account, uint256 blockNumber) external view returns (uint256); /** * @dev Returns the total supply of votes available at the end of a past block (`blockNumber`). * * NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes. * Votes that have not been delegated are still part of total supply, even though they would not participate in a * vote. */ function getPastTotalSupply(uint256 blockNumber) external view returns (uint256); /** * @dev Returns the delegate that `account` has chosen. */ function delegates(address account) external view returns (address); /** * @dev Delegates votes from the sender to `delegatee`. */ function delegate(address delegatee) external; /** * @dev Delegates votes from signer to `delegatee`. */ function delegateBySig( address delegatee, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s ) external; }
{ "optimizer": { "enabled": true, "runs": 100 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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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)
0000000000000000000000002684861ba9dada685a11c4e9e5aed8630f08afe000000000000000000000000067c569f960c1cc0b9a7979a851f5a67018c5a3b00000000000000000000000009d348281e16218cd8ede9cd8a1bca74e89b410e80000000000000000000000000000000000000000000000000000000000002710
-----Decoded View---------------
Arg [0] : _registry (address): 0x2684861Ba9dadA685a11C4e9E5aED8630f08afe0
Arg [1] : _royaltyRcv (address): 0x67c569F960C1Cc0B9a7979A851f5a67018c5A3b0
Arg [2] : _renderingContract (address): 0x9d348281e16218Cd8EDE9Cd8a1BcA74E89B410e8
Arg [3] : _royaltyFeeNumerator (uint96): 10000
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000002684861ba9dada685a11c4e9e5aed8630f08afe0
Arg [1] : 00000000000000000000000067c569f960c1cc0b9a7979a851f5a67018c5a3b0
Arg [2] : 0000000000000000000000009d348281e16218cd8ede9cd8a1bca74e89b410e8
Arg [3] : 0000000000000000000000000000000000000000000000000000000000002710
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