ERC-721
Overview
Max Total Supply
980,322,633.604646748835215696 veNFT
Holders
15,033
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
0.000000000000000001 veNFTLoading...
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Contract Name:
VotingEscrow
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.19;
import {IERC721Receiver} from "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import {IVeArtProxy} from "./interfaces/IVeArtProxy.sol";
import {IVotingEscrow} from "./interfaces/IVotingEscrow.sol";
import {IVoter} from "./interfaces/IVoter.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IERC6372} from "@openzeppelin/contracts/interfaces/IERC6372.sol";
import {IReward} from "./interfaces/IReward.sol";
import {IFactoryRegistry} from "./interfaces/factories/IFactoryRegistry.sol";
import {IManagedRewardsFactory} from "./interfaces/factories/IManagedRewardsFactory.sol";
import {ERC2771Context} from "@openzeppelin/contracts/metatx/ERC2771Context.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {DelegationLogicLibrary} from "./libraries/DelegationLogicLibrary.sol";
import {BalanceLogicLibrary} from "./libraries/BalanceLogicLibrary.sol";
/// @title Voting Escrow V2
/// @notice veNFT implementation that escrows ERC-20 tokens in the form of an ERC-721 NFT
/// @notice Votes have a weight depending on time, so that users are committed to the future of (whatever they are voting for)
/// @author Modified from Solidly (https://github.com/solidlyexchange/solidly/blob/master/contracts/ve.sol)
/// @author Modified from Curve (https://github.com/curvefi/curve-dao-contracts/blob/master/contracts/VotingEscrow.vy)
/// @author velodrome.finance, @figs999, @pegahcarter
/// @dev Vote weight decays linearly over time. Lock time cannot be more than `MAXTIME` (4 years).
contract VotingEscrow is IVotingEscrow, IERC6372, ERC2771Context, ReentrancyGuard {
using SafeERC20 for IERC20;
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
address public immutable forwarder;
address public immutable factoryRegistry;
address public immutable token;
address public distributor;
address public voter;
address public team;
address public artProxy;
/// @dev address which can create managed NFTs
address public allowedManager;
mapping(uint256 => GlobalPoint) internal _pointHistory; // epoch -> unsigned global point
/// @dev Mapping of interface id to bool about whether or not it's supported
mapping(bytes4 => bool) internal supportedInterfaces;
/// @dev ERC165 interface ID of ERC165
bytes4 internal constant ERC165_INTERFACE_ID = 0x01ffc9a7;
/// @dev ERC165 interface ID of ERC721
bytes4 internal constant ERC721_INTERFACE_ID = 0x80ac58cd;
/// @dev ERC165 interface ID of ERC721Metadata
bytes4 internal constant ERC721_METADATA_INTERFACE_ID = 0x5b5e139f;
/// @dev ERC165 interface ID of ERC4906
bytes4 internal constant ERC4906_INTERFACE_ID = 0x49064906;
/// @dev ERC165 interface ID of ERC6372
bytes4 internal constant ERC6372_INTERFACE_ID = 0xda287a1d;
/// @dev Current count of token
uint256 public tokenId;
/// @param _forwarder address of trusted forwarder
/// @param _token `VELO` token address
/// @param _factoryRegistry Factory Registry address
constructor(address _forwarder, address _token, address _factoryRegistry) ERC2771Context(_forwarder) {
forwarder = _forwarder;
token = _token;
factoryRegistry = _factoryRegistry;
team = _msgSender();
voter = _msgSender();
_pointHistory[0].blk = block.number;
_pointHistory[0].ts = block.timestamp;
supportedInterfaces[ERC165_INTERFACE_ID] = true;
supportedInterfaces[ERC721_INTERFACE_ID] = true;
supportedInterfaces[ERC721_METADATA_INTERFACE_ID] = true;
supportedInterfaces[ERC4906_INTERFACE_ID] = true;
supportedInterfaces[ERC6372_INTERFACE_ID] = true;
// mint-ish
emit Transfer(address(0), address(this), tokenId);
// burn-ish
emit Transfer(address(this), address(0), tokenId);
}
/*///////////////////////////////////////////////////////////////
MANAGED NFT STORAGE
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IVotingEscrow
mapping(uint256 => EscrowType) public escrowType;
/// @inheritdoc IVotingEscrow
mapping(uint256 => uint256) public idToManaged;
/// @inheritdoc IVotingEscrow
mapping(uint256 => mapping(uint256 => uint256)) public weights;
/// @inheritdoc IVotingEscrow
mapping(uint256 => bool) public deactivated;
/// @inheritdoc IVotingEscrow
mapping(uint256 => address) public managedToLocked;
/// @inheritdoc IVotingEscrow
mapping(uint256 => address) public managedToFree;
/*///////////////////////////////////////////////////////////////
MANAGED NFT LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IVotingEscrow
function createManagedLockFor(address _to) external nonReentrant returns (uint256 _mTokenId) {
address sender = _msgSender();
if (sender != allowedManager && sender != IVoter(voter).governor()) revert NotGovernorOrManager();
_mTokenId = ++tokenId;
_mint(_to, _mTokenId);
_depositFor(_mTokenId, 0, 0, LockedBalance(0, 0, true), DepositType.CREATE_LOCK_TYPE);
escrowType[_mTokenId] = EscrowType.MANAGED;
(address _lockedManagedReward, address _freeManagedReward) = IManagedRewardsFactory(
IFactoryRegistry(factoryRegistry).managedRewardsFactory()
).createRewards(forwarder, voter);
managedToLocked[_mTokenId] = _lockedManagedReward;
managedToFree[_mTokenId] = _freeManagedReward;
emit CreateManaged(_to, _mTokenId, sender, _lockedManagedReward, _freeManagedReward);
}
/// @inheritdoc IVotingEscrow
function depositManaged(uint256 _tokenId, uint256 _mTokenId) external nonReentrant {
if (_msgSender() != voter) revert NotVoter();
if (escrowType[_mTokenId] != EscrowType.MANAGED) revert NotManagedNFT();
if (escrowType[_tokenId] != EscrowType.NORMAL) revert NotNormalNFT();
if (_balanceOfNFTAt(_tokenId, block.timestamp) == 0) revert ZeroBalance();
// adjust user nft
int128 _amount = _locked[_tokenId].amount;
if (_locked[_tokenId].isPermanent) {
permanentLockBalance -= uint256(uint128(_amount));
_delegate(_tokenId, 0);
}
_checkpoint(_tokenId, _locked[_tokenId], LockedBalance(0, 0, false));
_locked[_tokenId] = LockedBalance(0, 0, false);
// adjust managed nft
uint256 _weight = uint256(uint128(_amount));
permanentLockBalance += _weight;
LockedBalance memory newLocked = _locked[_mTokenId];
newLocked.amount += _amount;
_checkpointDelegatee(_delegates[_mTokenId], uint256(uint128(_amount)), true);
_checkpoint(_mTokenId, _locked[_mTokenId], newLocked);
_locked[_mTokenId] = newLocked;
weights[_tokenId][_mTokenId] = _weight;
idToManaged[_tokenId] = _mTokenId;
escrowType[_tokenId] = EscrowType.LOCKED;
address _lockedManagedReward = managedToLocked[_mTokenId];
IReward(_lockedManagedReward)._deposit(uint256(uint128(_amount)), _tokenId);
address _freeManagedReward = managedToFree[_mTokenId];
IReward(_freeManagedReward)._deposit(uint256(uint128(_amount)), _tokenId);
emit DepositManaged(_ownerOf(_tokenId), _tokenId, _mTokenId, _weight, block.timestamp);
emit MetadataUpdate(_tokenId);
}
/// @inheritdoc IVotingEscrow
function withdrawManaged(uint256 _tokenId) external nonReentrant {
uint256 _mTokenId = idToManaged[_tokenId];
if (_msgSender() != voter) revert NotVoter();
if (_mTokenId == 0) revert InvalidManagedNFTId();
if (escrowType[_tokenId] != EscrowType.LOCKED) revert NotLockedNFT();
// update accrued rewards
address _lockedManagedReward = managedToLocked[_mTokenId];
address _freeManagedReward = managedToFree[_mTokenId];
uint256 _weight = weights[_tokenId][_mTokenId];
uint256 _reward = IReward(_lockedManagedReward).earned(address(token), _tokenId);
uint256 _total = _weight + _reward;
uint256 _unlockTime = ((block.timestamp + MAXTIME) / WEEK) * WEEK;
// claim locked rewards (rebases + compounded reward)
address[] memory rewards = new address[](1);
rewards[0] = address(token);
IReward(_lockedManagedReward).getReward(_tokenId, rewards);
// adjust user nft
LockedBalance memory newLockedNormal = LockedBalance(int128(int256(_total)), _unlockTime, false);
_checkpoint(_tokenId, _locked[_tokenId], newLockedNormal);
_locked[_tokenId] = newLockedNormal;
// adjust managed nft
LockedBalance memory newLockedManaged = _locked[_mTokenId];
// do not expect _total > locked.amount / permanentLockBalance but just in case
newLockedManaged.amount -= (
int128(int256(_total)) < newLockedManaged.amount ? int128(int256(_total)) : newLockedManaged.amount
);
permanentLockBalance -= (_total < permanentLockBalance ? _total : permanentLockBalance);
_checkpointDelegatee(_delegates[_mTokenId], _total, false);
_checkpoint(_mTokenId, _locked[_mTokenId], newLockedManaged);
_locked[_mTokenId] = newLockedManaged;
IReward(_lockedManagedReward)._withdraw(uint256(uint128(_weight)), _tokenId);
IReward(_freeManagedReward)._withdraw(uint256(uint128(_weight)), _tokenId);
delete idToManaged[_tokenId];
delete weights[_tokenId][_mTokenId];
delete escrowType[_tokenId];
emit WithdrawManaged(_ownerOf(_tokenId), _tokenId, _mTokenId, _total, block.timestamp);
emit MetadataUpdate(_tokenId);
}
/// @inheritdoc IVotingEscrow
function setAllowedManager(address _allowedManager) external {
if (_msgSender() != IVoter(voter).governor()) revert NotGovernor();
if (_allowedManager == allowedManager) revert SameAddress();
if (_allowedManager == address(0)) revert ZeroAddress();
allowedManager = _allowedManager;
emit SetAllowedManager(_allowedManager);
}
/// @inheritdoc IVotingEscrow
function setManagedState(uint256 _mTokenId, bool _state) external {
if (_msgSender() != IVoter(voter).emergencyCouncil() && _msgSender() != IVoter(voter).governor())
revert NotEmergencyCouncilOrGovernor();
if (escrowType[_mTokenId] != EscrowType.MANAGED) revert NotManagedNFT();
if (deactivated[_mTokenId] == _state) revert SameState();
deactivated[_mTokenId] = _state;
}
/*///////////////////////////////////////////////////////////////
METADATA STORAGE
//////////////////////////////////////////////////////////////*/
string public constant name = "veNFT";
string public constant symbol = "veNFT";
string public constant version = "2.0.0";
uint8 public constant decimals = 18;
function setTeam(address _team) external {
if (_msgSender() != team) revert NotTeam();
if (_team == address(0)) revert ZeroAddress();
team = _team;
}
function setArtProxy(address _proxy) external {
if (_msgSender() != team) revert NotTeam();
artProxy = _proxy;
emit BatchMetadataUpdate(0, type(uint256).max);
}
/// @inheritdoc IVotingEscrow
function tokenURI(uint256 _tokenId) external view returns (string memory) {
if (_ownerOf(_tokenId) == address(0)) revert NonExistentToken();
return IVeArtProxy(artProxy).tokenURI(_tokenId);
}
/*//////////////////////////////////////////////////////////////
ERC721 BALANCE/OWNER STORAGE
//////////////////////////////////////////////////////////////*/
/// @dev Mapping from NFT ID to the address that owns it.
mapping(uint256 => address) internal idToOwner;
/// @dev Mapping from owner address to count of his tokens.
mapping(address => uint256) internal ownerToNFTokenCount;
function _ownerOf(uint256 _tokenId) internal view returns (address) {
return idToOwner[_tokenId];
}
/// @inheritdoc IVotingEscrow
function ownerOf(uint256 _tokenId) external view returns (address) {
return _ownerOf(_tokenId);
}
/// @inheritdoc IVotingEscrow
function balanceOf(address _owner) external view returns (uint256) {
return ownerToNFTokenCount[_owner];
}
/*//////////////////////////////////////////////////////////////
ERC721 APPROVAL STORAGE
//////////////////////////////////////////////////////////////*/
/// @dev Mapping from NFT ID to approved address.
mapping(uint256 => address) internal idToApprovals;
/// @dev Mapping from owner address to mapping of operator addresses.
mapping(address => mapping(address => bool)) internal ownerToOperators;
mapping(uint256 => uint256) internal ownershipChange;
/// @inheritdoc IVotingEscrow
function getApproved(uint256 _tokenId) external view returns (address) {
return idToApprovals[_tokenId];
}
/// @inheritdoc IVotingEscrow
function isApprovedForAll(address _owner, address _operator) external view returns (bool) {
return (ownerToOperators[_owner])[_operator];
}
/// @inheritdoc IVotingEscrow
function isApprovedOrOwner(address _spender, uint256 _tokenId) external view returns (bool) {
return _isApprovedOrOwner(_spender, _tokenId);
}
function _isApprovedOrOwner(address _spender, uint256 _tokenId) internal view returns (bool) {
address owner = _ownerOf(_tokenId);
bool spenderIsOwner = owner == _spender;
bool spenderIsApproved = _spender == idToApprovals[_tokenId];
bool spenderIsApprovedForAll = (ownerToOperators[owner])[_spender];
return spenderIsOwner || spenderIsApproved || spenderIsApprovedForAll;
}
/*//////////////////////////////////////////////////////////////
ERC721 LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IVotingEscrow
function approve(address _approved, uint256 _tokenId) external {
address sender = _msgSender();
address owner = _ownerOf(_tokenId);
// Throws if `_tokenId` is not a valid NFT
if (owner == address(0)) revert ZeroAddress();
// Throws if `_approved` is the current owner
if (owner == _approved) revert SameAddress();
// Check requirements
bool senderIsOwner = (_ownerOf(_tokenId) == sender);
bool senderIsApprovedForAll = (ownerToOperators[owner])[sender];
if (!senderIsOwner && !senderIsApprovedForAll) revert NotApprovedOrOwner();
// Set the approval
idToApprovals[_tokenId] = _approved;
emit Approval(owner, _approved, _tokenId);
}
/// @inheritdoc IVotingEscrow
function setApprovalForAll(address _operator, bool _approved) external {
address sender = _msgSender();
// Throws if `_operator` is the `msg.sender`
if (_operator == sender) revert SameAddress();
ownerToOperators[sender][_operator] = _approved;
emit ApprovalForAll(sender, _operator, _approved);
}
/* TRANSFER FUNCTIONS */
function _transferFrom(address _from, address _to, uint256 _tokenId, address _sender) internal {
if (escrowType[_tokenId] == EscrowType.LOCKED) revert NotManagedOrNormalNFT();
// Check requirements
if (!_isApprovedOrOwner(_sender, _tokenId)) revert NotApprovedOrOwner();
// Clear approval. Throws if `_from` is not the current owner
if (_ownerOf(_tokenId) != _from) revert NotOwner();
delete idToApprovals[_tokenId];
// Remove NFT. Throws if `_tokenId` is not a valid NFT
_removeTokenFrom(_from, _tokenId);
// Update voting checkpoints
_checkpointDelegator(_tokenId, 0, _to);
// 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);
}
/// @inheritdoc IVotingEscrow
function transferFrom(address _from, address _to, uint256 _tokenId) external {
_transferFrom(_from, _to, _tokenId, _msgSender());
}
/// @inheritdoc IVotingEscrow
function safeTransferFrom(address _from, address _to, uint256 _tokenId) external {
safeTransferFrom(_from, _to, _tokenId, "");
}
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;
}
/// @inheritdoc IVotingEscrow
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes memory _data) public {
address sender = _msgSender();
_transferFrom(_from, _to, _tokenId, sender);
if (_isContract(_to)) {
// Throws if transfer destination is a contract which does not implement 'onERC721Received'
try IERC721Receiver(_to).onERC721Received(sender, _from, _tokenId, _data) returns (bytes4 response) {
if (response != IERC721Receiver(_to).onERC721Received.selector) {
revert ERC721ReceiverRejectedTokens();
}
} catch (bytes memory reason) {
if (reason.length == 0) {
revert ERC721TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
}
/*//////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IVotingEscrow
function supportsInterface(bytes4 _interfaceID) external view returns (bool) {
return supportedInterfaces[_interfaceID];
}
/*//////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IVotingEscrow
mapping(address => mapping(uint256 => uint256)) public ownerToNFTokenIdList;
/// @dev Mapping from NFT ID to index of owner
mapping(uint256 => uint256) internal tokenToOwnerIndex;
/// @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 = ownerToNFTokenCount[_to];
ownerToNFTokenIdList[_to][currentCount] = _tokenId;
tokenToOwnerIndex[_tokenId] = currentCount;
}
/// @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(_ownerOf(_tokenId) == address(0));
// Change the owner
idToOwner[_tokenId] = _to;
// Update owner token index tracking
_addTokenToOwnerList(_to, _tokenId);
// Change count tracking
ownerToNFTokenCount[_to] += 1;
}
/// @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);
// Update voting checkpoints
_checkpointDelegator(_tokenId, 0, _to);
emit Transfer(address(0), _to, _tokenId);
return true;
}
/// @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 = ownerToNFTokenCount[_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 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(_ownerOf(_tokenId) == _from);
// Change the owner
idToOwner[_tokenId] = address(0);
// Update owner token index tracking
_removeTokenFromOwnerList(_from, _tokenId);
// Change count tracking
ownerToNFTokenCount[_from] -= 1;
}
/// @dev Must be called prior to updating `LockedBalance`
function _burn(uint256 _tokenId) internal {
address sender = _msgSender();
if (!_isApprovedOrOwner(sender, _tokenId)) revert NotApprovedOrOwner();
address owner = _ownerOf(_tokenId);
// Clear approval
delete idToApprovals[_tokenId];
// Update voting checkpoints
_checkpointDelegator(_tokenId, 0, address(0));
// Remove token
_removeTokenFrom(owner, _tokenId);
emit Transfer(owner, address(0), _tokenId);
}
/*//////////////////////////////////////////////////////////////
ESCROW STORAGE
//////////////////////////////////////////////////////////////*/
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;
uint256 public epoch;
uint256 public supply;
mapping(uint256 => LockedBalance) internal _locked;
mapping(uint256 => UserPoint[1000000000]) internal _userPointHistory;
mapping(uint256 => uint256) public userPointEpoch;
/// @inheritdoc IVotingEscrow
mapping(uint256 => int128) public slopeChanges;
mapping(address => bool) public canSplit;
/// @notice Aggregate permanent locked balances
uint256 public permanentLockBalance;
/// @inheritdoc IVotingEscrow
function locked(uint256 _tokenId) external view returns (LockedBalance memory) {
return _locked[_tokenId];
}
/// @inheritdoc IVotingEscrow
function userPointHistory(uint256 _tokenId, uint256 _loc) external view returns (UserPoint memory) {
return _userPointHistory[_tokenId][_loc];
}
/// @inheritdoc IVotingEscrow
function pointHistory(uint256 _loc) external view returns (GlobalPoint memory) {
return _pointHistory[_loc];
}
/*//////////////////////////////////////////////////////////////
ESCROW LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Record global and per-user data to checkpoints. Used by VotingEscrow system.
/// @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 {
UserPoint memory uOld;
UserPoint memory uNew;
int128 oldDslope = 0;
int128 newDslope = 0;
uint256 _epoch = epoch;
if (_tokenId != 0) {
uNew.permanent = _newLocked.isPermanent ? uint256(int256(_newLocked.amount)) : 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];
}
}
}
GlobalPoint memory lastPoint = GlobalPoint({
bias: 0,
slope: 0,
ts: block.timestamp,
blk: block.number,
permanentLockBalance: 0
});
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
GlobalPoint memory initialLastPoint = GlobalPoint({
bias: lastPoint.bias,
slope: lastPoint.slope,
ts: lastPoint.ts,
blk: lastPoint.blk,
permanentLockBalance: lastPoint.permanentLockBalance
});
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 t_i = (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
t_i += WEEK; // Initial value of t_i is always larger than the ts of the last point
int128 d_slope = 0;
if (t_i > block.timestamp) {
t_i = block.timestamp;
} else {
d_slope = slopeChanges[t_i];
}
lastPoint.bias -= lastPoint.slope * int128(int256(t_i - lastCheckpoint));
lastPoint.slope += d_slope;
if (lastPoint.bias < 0) {
// This can happen
lastPoint.bias = 0;
}
if (lastPoint.slope < 0) {
// This cannot happen - just in case
lastPoint.slope = 0;
}
lastCheckpoint = t_i;
lastPoint.ts = t_i;
lastPoint.blk = initialLastPoint.blk + (blockSlope * (t_i - initialLastPoint.ts)) / MULTIPLIER;
_epoch += 1;
if (t_i == block.timestamp) {
lastPoint.blk = block.number;
break;
} else {
_pointHistory[_epoch] = lastPoint;
}
}
}
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;
}
lastPoint.permanentLockBalance = permanentLockBalance;
}
// If timestamp of last global point is the same, overwrite the last global point
// Else record the new global point into history
// Exclude epoch 0 (note: _epoch is always >= 1, see above)
// Two possible outcomes:
// Missing global checkpoints in prior weeks. In this case, _epoch = epoch + x, where x > 1
// No missing global checkpoints, but timestamp != block.timestamp. Create new checkpoint.
// No missing global checkpoints, but timestamp == block.timestamp. Overwrite last checkpoint.
if (_epoch != 1 && _pointHistory[_epoch - 1].ts == block.timestamp) {
// _epoch = epoch + 1, so we do not increment epoch
_pointHistory[_epoch - 1] = lastPoint;
} else {
// more than one global point may have been written, so we update epoch
epoch = _epoch;
_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) {
// update slope if new lock is greater than old lock and is not permanent or if old lock is permanent
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
}
// If timestamp of last user point is the same, overwrite the last user point
// Else record the new user point into history
// Exclude epoch 0
uNew.ts = block.timestamp;
uNew.blk = block.number;
uint256 userEpoch = userPointEpoch[_tokenId];
if (userEpoch != 0 && _userPointHistory[_tokenId][userEpoch].ts == block.timestamp) {
_userPointHistory[_tokenId][userEpoch] = uNew;
} else {
userPointEpoch[_tokenId] = ++userEpoch;
_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 _oldLocked Previous locked amount / timestamp
/// @param _depositType The type of deposit
function _depositFor(
uint256 _tokenId,
uint256 _value,
uint256 _unlockTime,
LockedBalance memory _oldLocked,
DepositType _depositType
) internal {
uint256 supplyBefore = supply;
supply = supplyBefore + _value;
// Set newLocked to _oldLocked without mangling memory
LockedBalance memory newLocked;
(newLocked.amount, newLocked.end, newLocked.isPermanent) = (
_oldLocked.amount,
_oldLocked.end,
_oldLocked.isPermanent
);
// Adding to existing lock, or if a lock is expired - creating a new one
newLocked.amount += int128(int256(_value));
if (_unlockTime != 0) {
newLocked.end = _unlockTime;
}
_locked[_tokenId] = newLocked;
// Possibilities:
// Both _oldLocked.end could be current or expired (>/< block.timestamp)
// or if the lock is a permanent lock, then _oldLocked.end == 0
// value == 0 (extend lock) or value > 0 (add to lock or extend lock)
// newLocked.end > block.timestamp (always)
_checkpoint(_tokenId, _oldLocked, newLocked);
address from = _msgSender();
if (_value != 0) {
IERC20(token).safeTransferFrom(from, address(this), _value);
}
emit Deposit(from, _tokenId, _depositType, _value, newLocked.end, block.timestamp);
emit Supply(supplyBefore, supplyBefore + _value);
}
/// @inheritdoc IVotingEscrow
function checkpoint() external nonReentrant {
_checkpoint(0, LockedBalance(0, 0, false), LockedBalance(0, 0, false));
}
/// @inheritdoc IVotingEscrow
function depositFor(uint256 _tokenId, uint256 _value) external nonReentrant {
if (escrowType[_tokenId] == EscrowType.MANAGED && _msgSender() != distributor) revert NotDistributor();
_increaseAmountFor(_tokenId, _value, DepositType.DEPOSIT_FOR_TYPE);
}
/// @dev 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 _createLock(uint256 _value, uint256 _lockDuration, address _to) internal returns (uint256) {
uint256 unlockTime = ((block.timestamp + _lockDuration) / WEEK) * WEEK; // Locktime is rounded down to weeks
if (_value == 0) revert ZeroAmount();
if (unlockTime <= block.timestamp) revert LockDurationNotInFuture();
if (unlockTime > block.timestamp + MAXTIME) revert LockDurationTooLong();
uint256 _tokenId = ++tokenId;
_mint(_to, _tokenId);
_depositFor(_tokenId, _value, unlockTime, _locked[_tokenId], DepositType.CREATE_LOCK_TYPE);
return _tokenId;
}
/// @inheritdoc IVotingEscrow
function createLock(uint256 _value, uint256 _lockDuration) external nonReentrant returns (uint256) {
return _createLock(_value, _lockDuration, _msgSender());
}
/// @inheritdoc IVotingEscrow
function createLockFor(uint256 _value, uint256 _lockDuration, address _to) external nonReentrant returns (uint256) {
return _createLock(_value, _lockDuration, _to);
}
function _increaseAmountFor(uint256 _tokenId, uint256 _value, DepositType _depositType) internal {
EscrowType _escrowType = escrowType[_tokenId];
if (_escrowType == EscrowType.LOCKED) revert NotManagedOrNormalNFT();
LockedBalance memory oldLocked = _locked[_tokenId];
if (_value == 0) revert ZeroAmount();
if (oldLocked.amount <= 0) revert NoLockFound();
if (oldLocked.end <= block.timestamp && !oldLocked.isPermanent) revert LockExpired();
if (oldLocked.isPermanent) permanentLockBalance += _value;
_checkpointDelegatee(_delegates[_tokenId], _value, true);
_depositFor(_tokenId, _value, 0, oldLocked, _depositType);
if (_escrowType == EscrowType.MANAGED) {
// increaseAmount called on managed tokens are treated as locked rewards
address _lockedManagedReward = managedToLocked[_tokenId];
address _token = token;
IERC20(_token).safeApprove(_lockedManagedReward, _value);
IReward(_lockedManagedReward).notifyRewardAmount(_token, _value);
IERC20(_token).safeApprove(_lockedManagedReward, 0);
}
emit MetadataUpdate(_tokenId);
}
/// @inheritdoc IVotingEscrow
function increaseAmount(uint256 _tokenId, uint256 _value) external nonReentrant {
if (!_isApprovedOrOwner(_msgSender(), _tokenId)) revert NotApprovedOrOwner();
_increaseAmountFor(_tokenId, _value, DepositType.INCREASE_LOCK_AMOUNT);
}
/// @inheritdoc IVotingEscrow
function increaseUnlockTime(uint256 _tokenId, uint256 _lockDuration) external nonReentrant {
if (!_isApprovedOrOwner(_msgSender(), _tokenId)) revert NotApprovedOrOwner();
if (escrowType[_tokenId] != EscrowType.NORMAL) revert NotNormalNFT();
LockedBalance memory oldLocked = _locked[_tokenId];
if (oldLocked.isPermanent) revert PermanentLock();
uint256 unlockTime = ((block.timestamp + _lockDuration) / WEEK) * WEEK; // Locktime is rounded down to weeks
if (oldLocked.end <= block.timestamp) revert LockExpired();
if (oldLocked.amount <= 0) revert NoLockFound();
if (unlockTime <= oldLocked.end) revert LockDurationNotInFuture();
if (unlockTime > block.timestamp + MAXTIME) revert LockDurationTooLong();
_depositFor(_tokenId, 0, unlockTime, oldLocked, DepositType.INCREASE_UNLOCK_TIME);
emit MetadataUpdate(_tokenId);
}
/// @inheritdoc IVotingEscrow
function withdraw(uint256 _tokenId) external nonReentrant {
address sender = _msgSender();
if (!_isApprovedOrOwner(sender, _tokenId)) revert NotApprovedOrOwner();
if (voted[_tokenId]) revert AlreadyVoted();
if (escrowType[_tokenId] != EscrowType.NORMAL) revert NotNormalNFT();
LockedBalance memory oldLocked = _locked[_tokenId];
if (oldLocked.isPermanent) revert PermanentLock();
if (block.timestamp < oldLocked.end) revert LockNotExpired();
uint256 value = uint256(int256(oldLocked.amount));
// Burn the NFT
_burn(_tokenId);
_locked[_tokenId] = LockedBalance(0, 0, false);
uint256 supplyBefore = supply;
supply = supplyBefore - value;
// oldLocked can have either expired <= timestamp or zero end
// oldLocked has only 0 end
// Both can have >= 0 amount
_checkpoint(_tokenId, oldLocked, LockedBalance(0, 0, false));
IERC20(token).safeTransfer(sender, value);
emit Withdraw(sender, _tokenId, value, block.timestamp);
emit Supply(supplyBefore, supplyBefore - value);
}
/// @inheritdoc IVotingEscrow
function merge(uint256 _from, uint256 _to) external nonReentrant {
address sender = _msgSender();
if (voted[_from]) revert AlreadyVoted();
if (escrowType[_from] != EscrowType.NORMAL) revert NotNormalNFT();
if (escrowType[_to] != EscrowType.NORMAL) revert NotNormalNFT();
if (_from == _to) revert SameNFT();
if (!_isApprovedOrOwner(sender, _from)) revert NotApprovedOrOwner();
if (!_isApprovedOrOwner(sender, _to)) revert NotApprovedOrOwner();
LockedBalance memory oldLockedTo = _locked[_to];
if (oldLockedTo.end <= block.timestamp && !oldLockedTo.isPermanent) revert LockExpired();
LockedBalance memory oldLockedFrom = _locked[_from];
if (oldLockedFrom.isPermanent) revert PermanentLock();
uint256 end = oldLockedFrom.end >= oldLockedTo.end ? oldLockedFrom.end : oldLockedTo.end;
_burn(_from);
_locked[_from] = LockedBalance(0, 0, false);
_checkpoint(_from, oldLockedFrom, LockedBalance(0, 0, false));
LockedBalance memory newLockedTo;
newLockedTo.amount = oldLockedTo.amount + oldLockedFrom.amount;
newLockedTo.isPermanent = oldLockedTo.isPermanent;
if (newLockedTo.isPermanent) {
permanentLockBalance += uint256(int256(oldLockedFrom.amount));
} else {
newLockedTo.end = end;
}
_checkpointDelegatee(_delegates[_to], uint256(int256(oldLockedFrom.amount)), true);
_checkpoint(_to, oldLockedTo, newLockedTo);
_locked[_to] = newLockedTo;
emit Merge(
sender,
_from,
_to,
uint256(uint128(oldLockedFrom.amount)),
uint256(uint128(oldLockedTo.amount)),
uint256(uint128(newLockedTo.amount)),
uint256(uint128(newLockedTo.end)),
block.timestamp
);
emit MetadataUpdate(_to);
}
/// @inheritdoc IVotingEscrow
function split(
uint256 _from,
uint256 _amount
) external nonReentrant returns (uint256 _tokenId1, uint256 _tokenId2) {
address sender = _msgSender();
address owner = _ownerOf(_from);
if (owner == address(0)) revert SplitNoOwner();
if (!canSplit[owner] && !canSplit[address(0)]) revert SplitNotAllowed();
if (escrowType[_from] != EscrowType.NORMAL) revert NotNormalNFT();
if (voted[_from]) revert AlreadyVoted();
if (!_isApprovedOrOwner(sender, _from)) revert NotApprovedOrOwner();
LockedBalance memory newLocked = _locked[_from];
if (newLocked.end <= block.timestamp && !newLocked.isPermanent) revert LockExpired();
int128 _splitAmount = int128(int256(_amount));
if (_splitAmount == 0) revert ZeroAmount();
if (newLocked.amount <= _splitAmount) revert AmountTooBig();
// Zero out and burn old veNFT
_burn(_from);
_locked[_from] = LockedBalance(0, 0, false);
_checkpoint(_from, newLocked, LockedBalance(0, 0, false));
// Create new veNFT using old balance - amount
newLocked.amount -= _splitAmount;
_tokenId1 = _createSplitNFT(owner, newLocked);
// Create new veNFT using amount
newLocked.amount = _splitAmount;
_tokenId2 = _createSplitNFT(owner, newLocked);
emit Split(
_from,
_tokenId1,
_tokenId2,
sender,
uint256(uint128(_locked[_tokenId1].amount)),
uint256(uint128(_splitAmount)),
uint256(uint128(newLocked.end)),
block.timestamp
);
}
function _createSplitNFT(address _to, LockedBalance memory _newLocked) private returns (uint256 _tokenId) {
_tokenId = ++tokenId;
_locked[_tokenId] = _newLocked;
_checkpoint(_tokenId, LockedBalance(0, 0, false), _newLocked);
_mint(_to, _tokenId);
}
/// @inheritdoc IVotingEscrow
function toggleSplit(address _account, bool _bool) external {
if (_msgSender() != team) revert NotTeam();
canSplit[_account] = _bool;
}
/// @inheritdoc IVotingEscrow
function lockPermanent(uint256 _tokenId) external {
address sender = _msgSender();
if (!_isApprovedOrOwner(sender, _tokenId)) revert NotApprovedOrOwner();
if (escrowType[_tokenId] != EscrowType.NORMAL) revert NotNormalNFT();
LockedBalance memory _newLocked = _locked[_tokenId];
if (_newLocked.isPermanent) revert PermanentLock();
if (_newLocked.end <= block.timestamp) revert LockExpired();
if (_newLocked.amount <= 0) revert NoLockFound();
uint256 _amount = uint256(int256(_newLocked.amount));
permanentLockBalance += _amount;
_newLocked.end = 0;
_newLocked.isPermanent = true;
_checkpoint(_tokenId, _locked[_tokenId], _newLocked);
_locked[_tokenId] = _newLocked;
emit LockPermanent(sender, _tokenId, _amount, block.timestamp);
emit MetadataUpdate(_tokenId);
}
/// @inheritdoc IVotingEscrow
function unlockPermanent(uint256 _tokenId) external {
address sender = _msgSender();
if (!_isApprovedOrOwner(sender, _tokenId)) revert NotApprovedOrOwner();
if (escrowType[_tokenId] != EscrowType.NORMAL) revert NotNormalNFT();
if (voted[_tokenId]) revert AlreadyVoted();
LockedBalance memory _newLocked = _locked[_tokenId];
if (!_newLocked.isPermanent) revert NotPermanentLock();
uint256 _amount = uint256(int256(_newLocked.amount));
permanentLockBalance -= _amount;
_newLocked.end = ((block.timestamp + MAXTIME) / WEEK) * WEEK;
_newLocked.isPermanent = false;
_delegate(_tokenId, 0);
_checkpoint(_tokenId, _locked[_tokenId], _newLocked);
_locked[_tokenId] = _newLocked;
emit UnlockPermanent(sender, _tokenId, _amount, block.timestamp);
emit MetadataUpdate(_tokenId);
}
/*///////////////////////////////////////////////////////////////
GAUGE VOTING STORAGE
//////////////////////////////////////////////////////////////*/
function _balanceOfNFTAt(uint256 _tokenId, uint256 _t) internal view returns (uint256) {
return BalanceLogicLibrary.balanceOfNFTAt(userPointEpoch, _userPointHistory, _tokenId, _t);
}
function _supplyAt(uint256 _timestamp) internal view returns (uint256) {
return BalanceLogicLibrary.supplyAt(slopeChanges, _pointHistory, epoch, _timestamp);
}
/// @inheritdoc IVotingEscrow
function balanceOfNFT(uint256 _tokenId) public view returns (uint256) {
if (ownershipChange[_tokenId] == block.number) return 0;
return _balanceOfNFTAt(_tokenId, block.timestamp);
}
/// @inheritdoc IVotingEscrow
function balanceOfNFTAt(uint256 _tokenId, uint256 _t) external view returns (uint256) {
return _balanceOfNFTAt(_tokenId, _t);
}
/// @inheritdoc IVotingEscrow
function totalSupply() external view returns (uint256) {
return _supplyAt(block.timestamp);
}
/// @inheritdoc IVotingEscrow
function totalSupplyAt(uint256 _timestamp) external view returns (uint256) {
return _supplyAt(_timestamp);
}
/*///////////////////////////////////////////////////////////////
GAUGE VOTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IVotingEscrow
mapping(uint256 => bool) public voted;
/// @inheritdoc IVotingEscrow
function setVoterAndDistributor(address _voter, address _distributor) external {
if (_msgSender() != voter) revert NotVoter();
voter = _voter;
distributor = _distributor;
}
/// @inheritdoc IVotingEscrow
function voting(uint256 _tokenId, bool _voted) external {
if (_msgSender() != voter) revert NotVoter();
voted[_tokenId] = _voted;
}
/*///////////////////////////////////////////////////////////////
DAO VOTING STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice The EIP-712 typehash for the contract's domain
bytes32 public constant DOMAIN_TYPEHASH =
keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
/// @notice The EIP-712 typehash for the delegation struct used by the contract
bytes32 public constant DELEGATION_TYPEHASH =
keccak256("Delegation(uint256 delegator,uint256 delegatee,uint256 nonce,uint256 expiry)");
/// @notice A record of each accounts delegate
mapping(uint256 => uint256) private _delegates;
/// @notice A record of delegated token checkpoints for each tokenId, by index
mapping(uint256 => mapping(uint48 => Checkpoint)) private _checkpoints;
/// @inheritdoc IVotingEscrow
mapping(uint256 => uint48) public numCheckpoints;
/// @inheritdoc IVotingEscrow
mapping(address => uint256) public nonces;
/// @inheritdoc IVotingEscrow
function delegates(uint256 delegator) external view returns (uint256) {
return _delegates[delegator];
}
/// @inheritdoc IVotingEscrow
function checkpoints(uint256 _tokenId, uint48 _index) external view returns (Checkpoint memory) {
return _checkpoints[_tokenId][_index];
}
/// @inheritdoc IVotingEscrow
function getPastVotes(address _account, uint256 _tokenId, uint256 _timestamp) external view returns (uint256) {
return DelegationLogicLibrary.getPastVotes(numCheckpoints, _checkpoints, _account, _tokenId, _timestamp);
}
/// @inheritdoc IVotingEscrow
function getPastTotalSupply(uint256 _timestamp) external view returns (uint256) {
return _supplyAt(_timestamp);
}
/*///////////////////////////////////////////////////////////////
DAO VOTING LOGIC
//////////////////////////////////////////////////////////////*/
function _checkpointDelegator(uint256 _delegator, uint256 _delegatee, address _owner) internal {
DelegationLogicLibrary.checkpointDelegator(
_locked,
numCheckpoints,
_checkpoints,
_delegates,
_delegator,
_delegatee,
_owner
);
}
function _checkpointDelegatee(uint256 _delegatee, uint256 balance_, bool _increase) internal {
DelegationLogicLibrary.checkpointDelegatee(numCheckpoints, _checkpoints, _delegatee, balance_, _increase);
}
/// @notice Record user delegation checkpoints. Used by voting system.
/// @dev Skips delegation if already delegated to `delegatee`.
function _delegate(uint256 _delegator, uint256 _delegatee) internal {
LockedBalance memory delegateLocked = _locked[_delegator];
if (!delegateLocked.isPermanent) revert NotPermanentLock();
if (_delegatee != 0 && _ownerOf(_delegatee) == address(0)) revert NonExistentToken();
if (ownershipChange[_delegator] == block.number) revert OwnershipChange();
if (_delegatee == _delegator) _delegatee = 0;
uint256 currentDelegate = _delegates[_delegator];
if (currentDelegate == _delegatee) return;
uint256 delegatedBalance = uint256(uint128(delegateLocked.amount));
_checkpointDelegator(_delegator, _delegatee, _ownerOf(_delegator));
_checkpointDelegatee(_delegatee, delegatedBalance, true);
emit DelegateChanged(_msgSender(), currentDelegate, _delegatee);
}
/// @inheritdoc IVotingEscrow
function delegate(uint256 delegator, uint256 delegatee) external {
if (!_isApprovedOrOwner(_msgSender(), delegator)) revert NotApprovedOrOwner();
return _delegate(delegator, delegatee);
}
/// @inheritdoc IVotingEscrow
function delegateBySig(
uint256 delegator,
uint256 delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) external {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) revert InvalidSignatureS();
bytes32 domainSeparator = keccak256(
abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), keccak256(bytes(version)), block.chainid, address(this))
);
bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegator, delegatee, nonce, expiry));
bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
address signatory = ecrecover(digest, v, r, s);
if (!_isApprovedOrOwner(signatory, delegator)) revert NotApprovedOrOwner();
if (signatory == address(0)) revert InvalidSignature();
if (nonce != nonces[signatory]++) revert InvalidNonce();
if (block.timestamp > expiry) revert SignatureExpired();
return _delegate(delegator, delegatee);
}
function clock() external view returns (uint48) {
return uint48(block.timestamp);
}
function CLOCK_MODE() external view returns (string memory) {
return "mode=timestamp";
}
}// 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: BUSL-1.1
pragma solidity ^0.8.0;
interface IVeArtProxy {
/// @dev Art configuration
struct Config {
// NFT metadata variables
int256 _tokenId;
int256 _balanceOf;
int256 _lockedEnd;
int256 _lockedAmount;
// Line art variables
int256 shape;
uint256 palette;
int256 maxLines;
int256 dash;
// Randomness variables
int256 seed1;
int256 seed2;
int256 seed3;
}
/// @dev Individual line art path variables.
struct lineConfig {
bytes8 color;
uint256 stroke;
uint256 offset;
uint256 offsetHalf;
uint256 offsetDashSum;
uint256 pathLength;
}
/// @dev Represents an (x,y) coordinate in a line.
struct Point {
int256 x;
int256 y;
}
/// @notice Generate a SVG based on veNFT metadata
/// @param _tokenId Unique veNFT identifier
/// @return output SVG metadata as HTML tag
function tokenURI(uint256 _tokenId) external view returns (string memory output);
/// @notice Generate only the foreground <path> elements of the line art for an NFT (excluding SVG header), for flexibility purposes.
/// @param _tokenId Unique veNFT identifier
/// @return output Encoded output of generateShape()
function lineArtPathsOnly(uint256 _tokenId) external view returns (bytes memory output);
/// @notice Generate the master art config metadata for a veNFT
/// @param _tokenId Unique veNFT identifier
/// @return cfg Config struct
function generateConfig(uint256 _tokenId) external view returns (Config memory cfg);
/// @notice Generate the points for two stripe lines based on the config generated for a veNFT
/// @param cfg Master art config metadata of a veNFT
/// @param l Number of line drawn
/// @return Line (x, y) coordinates of the drawn stripes
function twoStripes(Config memory cfg, int256 l) external pure returns (Point[100] memory Line);
/// @notice Generate the points for circles based on the config generated for a veNFT
/// @param cfg Master art config metadata of a veNFT
/// @param l Number of circles drawn
/// @return Line (x, y) coordinates of the drawn circles
function circles(Config memory cfg, int256 l) external pure returns (Point[100] memory Line);
/// @notice Generate the points for interlocking circles based on the config generated for a veNFT
/// @param cfg Master art config metadata of a veNFT
/// @param l Number of interlocking circles drawn
/// @return Line (x, y) coordinates of the drawn interlocking circles
function interlockingCircles(Config memory cfg, int256 l) external pure returns (Point[100] memory Line);
/// @notice Generate the points for corners based on the config generated for a veNFT
/// @param cfg Master art config metadata of a veNFT
/// @param l Number of corners drawn
/// @return Line (x, y) coordinates of the drawn corners
function corners(Config memory cfg, int256 l) external pure returns (Point[100] memory Line);
/// @notice Generate the points for a curve based on the config generated for a veNFT
/// @param cfg Master art config metadata of a veNFT
/// @param l Number of curve drawn
/// @return Line (x, y) coordinates of the drawn curve
function curves(Config memory cfg, int256 l) external pure returns (Point[100] memory Line);
/// @notice Generate the points for a spiral based on the config generated for a veNFT
/// @param cfg Master art config metadata of a veNFT
/// @param l Number of spiral drawn
/// @return Line (x, y) coordinates of the drawn spiral
function spiral(Config memory cfg, int256 l) external pure returns (Point[100] memory Line);
/// @notice Generate the points for an explosion based on the config generated for a veNFT
/// @param cfg Master art config metadata of a veNFT
/// @param l Number of explosion drawn
/// @return Line (x, y) coordinates of the drawn explosion
function explosion(Config memory cfg, int256 l) external pure returns (Point[100] memory Line);
/// @notice Generate the points for a wormhole based on the config generated for a veNFT
/// @param cfg Master art config metadata of a veNFT
/// @param l Number of wormhole drawn
/// @return Line (x, y) coordinates of the drawn wormhole
function wormhole(Config memory cfg, int256 l) external pure returns (Point[100] memory Line);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {IERC721, IERC721Metadata} from "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import {IERC4906} from "@openzeppelin/contracts/interfaces/IERC4906.sol";
import {IVotes} from "../governance/IVotes.sol";
interface IVotingEscrow is IVotes, IERC4906, IERC721Metadata {
struct LockedBalance {
int128 amount;
uint256 end;
bool isPermanent;
}
struct UserPoint {
int128 bias;
int128 slope; // # -dweight / dt
uint256 ts;
uint256 blk; // block
uint256 permanent;
}
struct GlobalPoint {
int128 bias;
int128 slope; // # -dweight / dt
uint256 ts;
uint256 blk; // block
uint256 permanentLockBalance;
}
/// @notice A checkpoint for recorded delegated voting weights at a certain timestamp
struct Checkpoint {
uint256 fromTimestamp;
address owner;
uint256 delegatedBalance;
uint256 delegatee;
}
enum DepositType {
DEPOSIT_FOR_TYPE,
CREATE_LOCK_TYPE,
INCREASE_LOCK_AMOUNT,
INCREASE_UNLOCK_TIME
}
/// @dev Different types of veNFTs:
/// NORMAL - typical veNFT
/// LOCKED - veNFT which is locked into a MANAGED veNFT
/// MANAGED - veNFT which can accept the deposit of NORMAL veNFTs
enum EscrowType {
NORMAL,
LOCKED,
MANAGED
}
error AlreadyVoted();
error AmountTooBig();
error ERC721ReceiverRejectedTokens();
error ERC721TransferToNonERC721ReceiverImplementer();
error InvalidNonce();
error InvalidSignature();
error InvalidSignatureS();
error InvalidManagedNFTId();
error LockDurationNotInFuture();
error LockDurationTooLong();
error LockExpired();
error LockNotExpired();
error NoLockFound();
error NonExistentToken();
error NotApprovedOrOwner();
error NotDistributor();
error NotEmergencyCouncilOrGovernor();
error NotGovernor();
error NotGovernorOrManager();
error NotManagedNFT();
error NotManagedOrNormalNFT();
error NotLockedNFT();
error NotNormalNFT();
error NotPermanentLock();
error NotOwner();
error NotTeam();
error NotVoter();
error OwnershipChange();
error PermanentLock();
error SameAddress();
error SameNFT();
error SameState();
error SplitNoOwner();
error SplitNotAllowed();
error SignatureExpired();
error TooManyTokenIDs();
error ZeroAddress();
error ZeroAmount();
error ZeroBalance();
event Deposit(
address indexed provider,
uint256 indexed tokenId,
DepositType indexed depositType,
uint256 value,
uint256 locktime,
uint256 ts
);
event Withdraw(address indexed provider, uint256 indexed tokenId, uint256 value, uint256 ts);
event LockPermanent(address indexed _owner, uint256 indexed _tokenId, uint256 amount, uint256 _ts);
event UnlockPermanent(address indexed _owner, uint256 indexed _tokenId, uint256 amount, uint256 _ts);
event Supply(uint256 prevSupply, uint256 supply);
event Merge(
address indexed _sender,
uint256 indexed _from,
uint256 indexed _to,
uint256 _amountFrom,
uint256 _amountTo,
uint256 _amountFinal,
uint256 _locktime,
uint256 _ts
);
event Split(
uint256 indexed _from,
uint256 indexed _tokenId1,
uint256 indexed _tokenId2,
address _sender,
uint256 _splitAmount1,
uint256 _splitAmount2,
uint256 _locktime,
uint256 _ts
);
event CreateManaged(
address indexed _to,
uint256 indexed _mTokenId,
address indexed _from,
address _lockedManagedReward,
address _freeManagedReward
);
event DepositManaged(
address indexed _owner,
uint256 indexed _tokenId,
uint256 indexed _mTokenId,
uint256 _weight,
uint256 _ts
);
event WithdrawManaged(
address indexed _owner,
uint256 indexed _tokenId,
uint256 indexed _mTokenId,
uint256 _weight,
uint256 _ts
);
event SetAllowedManager(address indexed _allowedManager);
// State variables
function factoryRegistry() external view returns (address);
function token() external view returns (address);
function distributor() external view returns (address);
function voter() external view returns (address);
function team() external view returns (address);
function artProxy() external view returns (address);
function allowedManager() external view returns (address);
function tokenId() external view returns (uint256);
/*///////////////////////////////////////////////////////////////
MANAGED NFT STORAGE
//////////////////////////////////////////////////////////////*/
/// @dev Mapping of token id to escrow type
/// Takes advantage of the fact default value is EscrowType.NORMAL
function escrowType(uint256 tokenId) external view returns (EscrowType);
/// @dev Mapping of token id to managed id
function idToManaged(uint256 tokenId) external view returns (uint256 managedTokenId);
/// @dev Mapping of user token id to managed token id to weight of token id
function weights(uint256 tokenId, uint256 managedTokenId) external view returns (uint256 weight);
/// @dev Mapping of managed id to deactivated state
function deactivated(uint256 tokenId) external view returns (bool inactive);
/// @dev Mapping from managed nft id to locked managed rewards
/// `token` denominated rewards (rebases/rewards) stored in locked managed rewards contract
/// to prevent co-mingling of assets
function managedToLocked(uint256 tokenId) external view returns (address);
/// @dev Mapping from managed nft id to free managed rewards contract
/// these rewards can be freely withdrawn by users
function managedToFree(uint256 tokenId) external view returns (address);
/*///////////////////////////////////////////////////////////////
MANAGED NFT LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Create managed NFT (a permanent lock) for use within ecosystem.
/// @dev Throws if address already owns a managed NFT.
/// @return _mTokenId managed token id.
function createManagedLockFor(address _to) external returns (uint256 _mTokenId);
/// @notice Delegates balance to managed nft
/// Note that NFTs deposited into a managed NFT will be re-locked
/// to the maximum lock time on withdrawal.
/// Permanent locks that are deposited will automatically unlock.
/// @dev Managed nft will remain max-locked as long as there is at least one
/// deposit or withdrawal per week.
/// Throws if deposit nft is managed.
/// Throws if recipient nft is not managed.
/// Throws if deposit nft is already locked.
/// Throws if not called by voter.
/// @param _tokenId tokenId of NFT being deposited
/// @param _mTokenId tokenId of managed NFT that will receive the deposit
function depositManaged(uint256 _tokenId, uint256 _mTokenId) external;
/// @notice Retrieves locked rewards and withdraws balance from managed nft.
/// Note that the NFT withdrawn is re-locked to the maximum lock time.
/// @dev Throws if NFT not locked.
/// Throws if not called by voter.
/// @param _tokenId tokenId of NFT being deposited.
function withdrawManaged(uint256 _tokenId) external;
/// @notice Permit one address to call createManagedLockFor() that is not Voter.governor()
function setAllowedManager(address _allowedManager) external;
/// @notice Set Managed NFT state. Inactive NFTs cannot be deposited into.
/// @param _mTokenId managed nft state to set
/// @param _state true => inactive, false => active
function setManagedState(uint256 _mTokenId, bool _state) external;
/*///////////////////////////////////////////////////////////////
METADATA STORAGE
//////////////////////////////////////////////////////////////*/
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function version() external view returns (string memory);
function decimals() external view returns (uint8);
function setTeam(address _team) external;
function setArtProxy(address _proxy) external;
/// @inheritdoc IERC721Metadata
function tokenURI(uint256 tokenId) external view returns (string memory);
/*//////////////////////////////////////////////////////////////
ERC721 BALANCE/OWNER STORAGE
//////////////////////////////////////////////////////////////*/
/// @dev Mapping from owner address to mapping of index to tokenId
function ownerToNFTokenIdList(address _owner, uint256 _index) external view returns (uint256 _tokenId);
/// @inheritdoc IERC721
function ownerOf(uint256 tokenId) external view returns (address owner);
/// @inheritdoc IERC721
function balanceOf(address owner) external view returns (uint256 balance);
/*//////////////////////////////////////////////////////////////
ERC721 APPROVAL STORAGE
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IERC721
function getApproved(uint256 _tokenId) external view returns (address operator);
/// @inheritdoc IERC721
function isApprovedForAll(address owner, address operator) external view returns (bool);
/// @notice Check whether spender is owner or an approved user for a given veNFT
/// @param _spender .
/// @param _tokenId .
function isApprovedOrOwner(address _spender, uint256 _tokenId) external returns (bool);
/*//////////////////////////////////////////////////////////////
ERC721 LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IERC721
function approve(address to, uint256 tokenId) external;
/// @inheritdoc IERC721
function setApprovalForAll(address operator, bool approved) external;
/// @inheritdoc IERC721
function transferFrom(address from, address to, uint256 tokenId) external;
/// @inheritdoc IERC721
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/// @inheritdoc IERC721
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
/*//////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
function supportsInterface(bytes4 _interfaceID) external view returns (bool);
/*//////////////////////////////////////////////////////////////
ESCROW STORAGE
//////////////////////////////////////////////////////////////*/
function epoch() external view returns (uint256);
function supply() external view returns (uint256);
function userPointEpoch(uint256 _tokenId) external view returns (uint256 _epoch);
/// @notice time -> signed slope change
function slopeChanges(uint256 _timestamp) external view returns (int128);
/// @notice account -> can split
function canSplit(address _account) external view returns (bool);
/// @notice Global point history at a given index
function pointHistory(uint256 _loc) external view returns (GlobalPoint memory);
/// @notice Get the LockedBalance (amount, end) of a _tokenId
/// @param _tokenId .
/// @return LockedBalance of _tokenId
function locked(uint256 _tokenId) external view returns (LockedBalance memory);
/// @notice User -> UserPoint[userEpoch]
function userPointHistory(uint256 _tokenId, uint256 _loc) external view returns (UserPoint memory);
/*//////////////////////////////////////////////////////////////
ESCROW LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Record global data to checkpoint
function checkpoint() external;
/// @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;
/// @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)
/// @return TokenId of created veNFT
function createLock(uint256 _value, uint256 _lockDuration) external returns (uint256);
/// @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
/// @return TokenId of created veNFT
function createLockFor(uint256 _value, uint256 _lockDuration, address _to) external returns (uint256);
/// @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;
/// @notice Extend the unlock time for `_tokenId`
/// Cannot extend lock time of permanent locks
/// @param _lockDuration New number of seconds until tokens unlock
function increaseUnlockTime(uint256 _tokenId, uint256 _lockDuration) external;
/// @notice Withdraw all tokens for `_tokenId`
/// @dev Only possible if the lock is both expired and not permanent
/// This will burn the veNFT. Any rebases or rewards that are unclaimed
/// will no longer be claimable. Claim all rebases and rewards prior to calling this.
function withdraw(uint256 _tokenId) external;
/// @notice Merges `_from` into `_to`.
/// @dev Cannot merge `_from` locks that are permanent or have already voted this epoch.
/// Cannot merge `_to` locks that have already expired.
/// This will burn the veNFT. Any rebases or rewards that are unclaimed
/// will no longer be claimable. Claim all rebases and rewards prior to calling this.
/// @param _from VeNFT to merge from.
/// @param _to VeNFT to merge into.
function merge(uint256 _from, uint256 _to) external;
/// @notice Splits veNFT into two new veNFTS - one with oldLocked.amount - `_amount`, and the second with `_amount`
/// @dev This burns the tokenId of the target veNFT
/// Callable by approved or owner
/// If this is called by approved, approved will not have permissions to manipulate the newly created veNFTs
/// Returns the two new split veNFTs to owner
/// If `from` is permanent, will automatically dedelegate.
/// This will burn the veNFT. Any rebases or rewards that are unclaimed
/// will no longer be claimable. Claim all rebases and rewards prior to calling this.
/// @param _from VeNFT to split.
/// @param _amount Amount to split from veNFT.
/// @return _tokenId1 Return tokenId of veNFT with oldLocked.amount - `_amount`.
/// @return _tokenId2 Return tokenId of veNFT with `_amount`.
function split(uint256 _from, uint256 _amount) external returns (uint256 _tokenId1, uint256 _tokenId2);
/// @notice Toggle split for a specific veNFT.
/// @dev Toggle split for address(0) to enable or disable for all.
/// @param _account Address to toggle split permissions
/// @param _bool True to allow, false to disallow
function toggleSplit(address _account, bool _bool) external;
/// @notice Permanently lock a veNFT. Voting power will be equal to
/// `LockedBalance.amount` with no decay. Required to delegate.
/// @dev Only callable by unlocked normal veNFTs.
/// @param _tokenId tokenId to lock.
function lockPermanent(uint256 _tokenId) external;
/// @notice Unlock a permanently locked veNFT. Voting power will decay.
/// Will automatically dedelegate if delegated.
/// @dev Only callable by permanently locked veNFTs.
/// Cannot unlock if already voted this epoch.
/// @param _tokenId tokenId to unlock.
function unlockPermanent(uint256 _tokenId) external;
/*///////////////////////////////////////////////////////////////
GAUGE VOTING STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice Get the voting power for _tokenId at the current timestamp
/// @dev Returns 0 if called in the same block as a transfer.
/// @param _tokenId .
/// @return Voting power
function balanceOfNFT(uint256 _tokenId) external view returns (uint256);
/// @notice Get the voting power for _tokenId at a given timestamp
/// @param _tokenId .
/// @param _t Timestamp to query voting power
/// @return Voting power
function balanceOfNFTAt(uint256 _tokenId, uint256 _t) external view returns (uint256);
/// @notice Calculate total voting power at current timestamp
/// @return Total voting power at current timestamp
function totalSupply() external view returns (uint256);
/// @notice Calculate total voting power at a given timestamp
/// @param _t Timestamp to query total voting power
/// @return Total voting power at given timestamp
function totalSupplyAt(uint256 _t) external view returns (uint256);
/*///////////////////////////////////////////////////////////////
GAUGE VOTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice See if a queried _tokenId has actively voted
/// @param _tokenId .
/// @return True if voted, else false
function voted(uint256 _tokenId) external view returns (bool);
/// @notice Set the global state voter and distributor
/// @dev This is only called once, at setup
function setVoterAndDistributor(address _voter, address _distributor) external;
/// @notice Set `voted` for _tokenId to true or false
/// @dev Only callable by voter
/// @param _tokenId .
/// @param _voted .
function voting(uint256 _tokenId, bool _voted) external;
/*///////////////////////////////////////////////////////////////
DAO VOTING STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice The number of checkpoints for each tokenId
function numCheckpoints(uint256 tokenId) external view returns (uint48);
/// @notice A record of states for signing / validating signatures
function nonces(address account) external view returns (uint256);
/// @inheritdoc IVotes
function delegates(uint256 delegator) external view returns (uint256);
/// @notice A record of delegated token checkpoints for each account, by index
/// @param tokenId .
/// @param index .
/// @return Checkpoint
function checkpoints(uint256 tokenId, uint48 index) external view returns (Checkpoint memory);
/// @inheritdoc IVotes
function getPastVotes(address account, uint256 tokenId, uint256 timestamp) external view returns (uint256);
/// @inheritdoc IVotes
function getPastTotalSupply(uint256 timestamp) external view returns (uint256);
/*///////////////////////////////////////////////////////////////
DAO VOTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IVotes
function delegate(uint256 delegator, uint256 delegatee) external;
/// @inheritdoc IVotes
function delegateBySig(
uint256 delegator,
uint256 delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) external;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IVoter {
error AlreadyVotedOrDeposited();
error DistributeWindow();
error FactoryPathNotApproved();
error GaugeAlreadyKilled();
error GaugeAlreadyRevived();
error GaugeExists();
error GaugeDoesNotExist(address _pool);
error GaugeNotAlive(address _gauge);
error InactiveManagedNFT();
error MaximumVotingNumberTooLow();
error NonZeroVotes();
error NotAPool();
error NotApprovedOrOwner();
error NotGovernor();
error NotEmergencyCouncil();
error NotMinter();
error NotWhitelistedNFT();
error NotWhitelistedToken();
error SameValue();
error SpecialVotingWindow();
error TooManyPools();
error UnequalLengths();
error ZeroBalance();
error ZeroAddress();
event GaugeCreated(
address indexed poolFactory,
address indexed votingRewardsFactory,
address indexed gaugeFactory,
address pool,
address bribeVotingReward,
address feeVotingReward,
address gauge,
address creator
);
event GaugeKilled(address indexed gauge);
event GaugeRevived(address indexed gauge);
event Voted(
address indexed voter,
address indexed pool,
uint256 indexed tokenId,
uint256 weight,
uint256 totalWeight,
uint256 timestamp
);
event Abstained(
address indexed voter,
address indexed pool,
uint256 indexed tokenId,
uint256 weight,
uint256 totalWeight,
uint256 timestamp
);
event NotifyReward(address indexed sender, address indexed reward, uint256 amount);
event DistributeReward(address indexed sender, address indexed gauge, uint256 amount);
event WhitelistToken(address indexed whitelister, address indexed token, bool indexed _bool);
event WhitelistNFT(address indexed whitelister, uint256 indexed tokenId, bool indexed _bool);
// mappings
function gauges(address pool) external view returns (address);
function poolForGauge(address gauge) external view returns (address);
function gaugeToFees(address gauge) external view returns (address);
function gaugeToBribe(address gauge) external view returns (address);
function weights(address pool) external view returns (uint256);
function votes(uint256 tokenId, address pool) external view returns (uint256);
function usedWeights(uint256 tokenId) external view returns (uint256);
function lastVoted(uint256 tokenId) external view returns (uint256);
function isGauge(address) external view returns (bool);
function isWhitelistedToken(address token) external view returns (bool);
function isWhitelistedNFT(uint256 tokenId) external view returns (bool);
function isAlive(address gauge) external view returns (bool);
function ve() external view returns (address);
function governor() external view returns (address);
function epochGovernor() external view returns (address);
function emergencyCouncil() external view returns (address);
function length() external view returns (uint256);
/// @notice Called by Minter to distribute weekly emissions rewards for disbursement amongst gauges.
/// @dev Assumes totalWeight != 0 (Will never be zero as long as users are voting).
/// Throws if not called by minter.
/// @param _amount Amount of rewards to distribute.
function notifyRewardAmount(uint256 _amount) external;
/// @dev Utility to distribute to gauges of pools in range _start to _finish.
/// @param _start Starting index of gauges to distribute to.
/// @param _finish Ending index of gauges to distribute to.
function distribute(uint256 _start, uint256 _finish) external;
/// @dev Utility to distribute to gauges of pools in array.
/// @param _gauges Array of gauges to distribute to.
function distribute(address[] memory _gauges) external;
/// @notice Called by users to update voting balances in voting rewards contracts.
/// @param _tokenId Id of veNFT whose balance you wish to update.
function poke(uint256 _tokenId) external;
/// @notice Called by users to vote for pools. Votes distributed proportionally based on weights.
/// Can only vote or deposit into a managed NFT once per epoch.
/// Can only vote for gauges that have not been killed.
/// @dev Weights are distributed proportional to the sum of the weights in the array.
/// Throws if length of _poolVote and _weights do not match.
/// @param _tokenId Id of veNFT you are voting with.
/// @param _poolVote Array of pools you are voting for.
/// @param _weights Weights of pools.
function vote(uint256 _tokenId, address[] calldata _poolVote, uint256[] calldata _weights) external;
/// @notice Called by users to reset voting state. Required if you wish to make changes to
/// veNFT state (e.g. merge, split, deposit into managed etc).
/// Cannot reset in the same epoch that you voted in.
/// Can vote or deposit into a managed NFT again after reset.
/// @param _tokenId Id of veNFT you are reseting.
function reset(uint256 _tokenId) external;
/// @notice Called by users to deposit into a managed NFT.
/// Can only vote or deposit into a managed NFT once per epoch.
/// Note that NFTs deposited into a managed NFT will be re-locked
/// to the maximum lock time on withdrawal.
/// @dev Throws if not approved or owner.
/// Throws if managed NFT is inactive.
/// Throws if depositing within privileged window (one hour prior to epoch flip).
function depositManaged(uint256 _tokenId, uint256 _mTokenId) external;
/// @notice Called by users to withdraw from a managed NFT.
/// Cannot do it in the same epoch that you deposited into a managed NFT.
/// Can vote or deposit into a managed NFT again after withdrawing.
/// Note that the NFT withdrawn is re-locked to the maximum lock time.
function withdrawManaged(uint256 _tokenId) external;
/// @notice Claim emissions from gauges.
/// @param _gauges Array of gauges to collect emissions from.
function claimRewards(address[] memory _gauges) external;
/// @notice Claim bribes for a given NFT.
/// @dev Utility to help batch bribe claims.
/// @param _bribes Array of BribeVotingReward contracts to collect from.
/// @param _tokens Array of tokens that are used as bribes.
/// @param _tokenId Id of veNFT that you wish to claim bribes for.
function claimBribes(address[] memory _bribes, address[][] memory _tokens, uint256 _tokenId) external;
/// @notice Claim fees for a given NFT.
/// @dev Utility to help batch fee claims.
/// @param _fees Array of FeesVotingReward contracts to collect from.
/// @param _tokens Array of tokens that are used as fees.
/// @param _tokenId Id of veNFT that you wish to claim fees for.
function claimFees(address[] memory _fees, address[][] memory _tokens, uint256 _tokenId) external;
/// @notice Set new governor.
/// @dev Throws if not called by governor.
/// @param _governor .
function setGovernor(address _governor) external;
/// @notice Set new epoch based governor.
/// @dev Throws if not called by governor.
/// @param _epochGovernor .
function setEpochGovernor(address _epochGovernor) external;
/// @notice Set new emergency council.
/// @dev Throws if not called by emergency council.
/// @param _emergencyCouncil .
function setEmergencyCouncil(address _emergencyCouncil) external;
/// @notice Whitelist (or unwhitelist) token for use in bribes.
/// @dev Throws if not called by governor.
/// @param _token .
/// @param _bool .
function whitelistToken(address _token, bool _bool) external;
/// @notice Whitelist (or unwhitelist) token id for voting in last hour prior to epoch flip.
/// @dev Throws if not called by governor.
/// Throws if already whitelisted.
/// @param _tokenId .
/// @param _bool .
function whitelistNFT(uint256 _tokenId, bool _bool) external;
/// @notice Create a new gauge (unpermissioned).
/// @dev Governor can create a new gauge for a pool with any address.
/// @dev V1 gauges can only be created by governor.
/// @param _poolFactory .
/// @param _pool .
function createGauge(address _poolFactory, address _pool) external returns (address);
/// @notice Kills a gauge. The gauge will not receive any new emissions and cannot be deposited into.
/// Can still withdraw from gauge.
/// @dev Throws if not called by emergency council.
/// Throws if gauge already killed.
/// @param _gauge .
function killGauge(address _gauge) external;
/// @notice Revives a killed gauge. Gauge will can receive emissions and deposits again.
/// @dev Throws if not called by emergency council.
/// Throws if gauge is not killed.
/// @param _gauge .
function reviveGauge(address _gauge) external;
/// @dev Update claims to emissions for an array of gauges.
/// @param _gauges Array of gauges to update emissions for.
function updateFor(address[] memory _gauges) external;
/// @dev Update claims to emissions for gauges based on their pool id as stored in Voter.
/// @param _start Starting index of pools.
/// @param _end Ending index of pools.
function updateFor(uint256 _start, uint256 _end) external;
/// @dev Update claims to emissions for single gauge
/// @param _gauge .
function updateFor(address _gauge) external;
}// 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 v4.8.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (interfaces/IERC6372.sol)
pragma solidity ^0.8.0;
interface IERC6372 {
/**
* @dev Clock used for flagging checkpoints. Can be overridden to implement timestamp based checkpoints (and voting).
*/
function clock() external view returns (uint48);
/**
* @dev Description of the clock
*/
// solhint-disable-next-line func-name-mixedcase
function CLOCK_MODE() external view returns (string memory);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IReward {
error InvalidReward();
error NotAuthorized();
error NotGauge();
error NotEscrowToken();
error NotSingleToken();
error NotVotingEscrow();
error NotWhitelisted();
error ZeroAmount();
event Deposit(address indexed from, uint256 indexed tokenId, uint256 amount);
event Withdraw(address indexed from, uint256 indexed tokenId, uint256 amount);
event NotifyReward(address indexed from, address indexed reward, uint256 indexed epoch, uint256 amount);
event ClaimRewards(address indexed from, address indexed reward, uint256 amount);
/// @notice Deposit an amount into the rewards contract to earn future rewards associated to a veNFT
/// @dev Internal notation used as only callable internally by `authorized`.
/// @param amount Amount deposited for the veNFT
/// @param tokenId Unique identifier of the veNFT
function _deposit(uint256 amount, uint256 tokenId) external;
/// @notice Withdraw an amount from the rewards contract associated to a veNFT
/// @dev Internal notation used as only callable internally by `authorized`.
/// @param amount Amount deposited for the veNFT
/// @param tokenId Unique identifier of the veNFT
function _withdraw(uint256 amount, uint256 tokenId) external;
/// @notice Claim the rewards earned by a veNFT staker
/// @param tokenId Unique identifier of the veNFT
/// @param tokens Array of tokens to claim rewards of
function getReward(uint256 tokenId, address[] memory tokens) external;
/// @notice Add rewards for stakers to earn
/// @param token Address of token to reward
/// @param amount Amount of token to transfer to rewards
function notifyRewardAmount(address token, uint256 amount) external;
/// @notice Determine the prior balance for an account as of a block number
/// @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
/// @param tokenId The token of the NFT to check
/// @param timestamp The timestamp to get the balance at
/// @return The balance the account had as of the given block
function getPriorBalanceIndex(uint256 tokenId, uint256 timestamp) external view returns (uint256);
/// @notice Determine the prior index of supply staked by of a timestamp
/// @dev Timestamp must be <= current timestamp
/// @param timestamp The timestamp to get the index at
/// @return Index of supply checkpoint
function getPriorSupplyIndex(uint256 timestamp) external view returns (uint256);
/// @notice Calculate how much in rewards are earned for a specific token and veNFT
/// @param token Address of token to fetch rewards of
/// @param tokenId Unique identifier of the veNFT
/// @return Amount of token earned in rewards
function earned(address token, uint256 tokenId) external view returns (uint256);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IFactoryRegistry {
error FallbackFactory();
error InvalidFactoriesToPoolFactory();
error PathAlreadyApproved();
error PathNotApproved();
error SameAddress();
error ZeroAddress();
event Approve(address indexed poolFactory, address indexed votingRewardsFactory, address indexed gaugeFactory);
event Unapprove(address indexed poolFactory, address indexed votingRewardsFactory, address indexed gaugeFactory);
event SetManagedRewardsFactory(address indexed _newRewardsFactory);
/// @notice Approve a set of factories used in Velodrome Protocol.
/// Router.sol is able to swap any poolFactories currently approved.
/// Cannot approve address(0) factories.
/// Cannot aprove path that is already approved.
/// Each poolFactory has one unique set and maintains state. In the case a poolFactory is unapproved
/// and then re-approved, the same set of factories must be used. In other words, you cannot overwrite
/// the factories tied to a poolFactory address.
/// VotingRewardsFactories and GaugeFactories may use the same address across multiple poolFactories.
/// @dev Callable by onlyOwner
/// @param poolFactory .
/// @param votingRewardsFactory .
/// @param gaugeFactory .
function approve(address poolFactory, address votingRewardsFactory, address gaugeFactory) external;
/// @notice Unapprove a set of factories used in Velodrome Protocol.
/// While a poolFactory is unapproved, Router.sol cannot swap with pools made from the corresponding factory
/// Can only unapprove an approved path.
/// Cannot unapprove the fallback path (core v2 factories).
/// @dev Callable by onlyOwner
/// @param poolFactory .
function unapprove(address poolFactory) external;
/// @notice Factory to create free and locked rewards for a managed veNFT
function managedRewardsFactory() external view returns (address);
/// @notice Set the rewards factory address
/// @dev Callable by onlyOwner
/// @param _newManagedRewardsFactory address of new managedRewardsFactory
function setManagedRewardsFactory(address _newManagedRewardsFactory) external;
/// @notice Get the factories correlated to a poolFactory.
/// Once set, this can never be modified.
/// Returns the correlated factories even after an approved poolFactory is unapproved.
function factoriesToPoolFactory(
address poolFactory
) external view returns (address votingRewardsFactory, address gaugeFactory);
/// @notice Get all PoolFactories approved by the registry
/// @dev The same PoolFactory address cannot be used twice
/// @return Array of PoolFactory addresses
function poolFactories() external view returns (address[] memory);
/// @notice Check if a PoolFactory is approved within the factory registry. Router uses this method to
/// ensure a pool swapped from is approved.
/// @param poolFactory .
/// @return True if PoolFactory is approved, else false
function isPoolFactoryApproved(address poolFactory) external view returns (bool);
/// @notice Get the length of the poolFactories array
function poolFactoriesLength() external view returns (uint256);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IManagedRewardsFactory {
event ManagedRewardCreated(
address indexed voter,
address indexed lockedManagedReward,
address indexed freeManagedReward
);
/// @notice creates a LockedManagedReward and a FreeManagedReward contract for a managed veNFT
/// @param _forwarder Address of trusted forwarder
/// @param _voter Address of Voter.sol
/// @return lockedManagedReward Address of LockedManagedReward contract created
/// @return freeManagedReward Address of FreeManagedReward contract created
function createRewards(
address _forwarder,
address _voter
) external returns (address lockedManagedReward, address freeManagedReward);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (metatx/ERC2771Context.sol)
pragma solidity ^0.8.9;
import "../utils/Context.sol";
/**
* @dev Context variant with ERC2771 support.
*/
abstract contract ERC2771Context is Context {
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable
address private immutable _trustedForwarder;
/// @custom:oz-upgrades-unsafe-allow constructor
constructor(address trustedForwarder) {
_trustedForwarder = trustedForwarder;
}
function isTrustedForwarder(address forwarder) public view virtual returns (bool) {
return forwarder == _trustedForwarder;
}
function _msgSender() internal view virtual override returns (address sender) {
if (isTrustedForwarder(msg.sender)) {
// The assembly code is more direct than the Solidity version using `abi.decode`.
/// @solidity memory-safe-assembly
assembly {
sender := shr(96, calldataload(sub(calldatasize(), 20)))
}
} else {
return super._msgSender();
}
}
function _msgData() internal view virtual override returns (bytes calldata) {
if (isTrustedForwarder(msg.sender)) {
return msg.data[:msg.data.length - 20];
} else {
return super._msgData();
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.19;
import {IVotingEscrow} from "../interfaces/IVotingEscrow.sol";
library DelegationLogicLibrary {
/// @notice Used by `_mint`, `_transferFrom`, `_burn` and `delegate`
/// to update delegator voting checkpoints.
/// Automatically dedelegates, then updates checkpoint.
/// @dev This function depends on `_locked` and must be called prior to token state changes.
/// If you wish to dedelegate only, use `_delegate(tokenId, 0)` instead.
/// @param _locked State of all locked balances
/// @param _numCheckpoints State of all user checkpoint counts
/// @param _checkpoints State of all user checkpoints
/// @param _delegates State of all user delegatees
/// @param _delegator The delegator to update checkpoints for
/// @param _delegatee The new delegatee for the delegator. Cannot be equal to `_delegator` (use 0 instead).
/// @param _owner The new (or current) owner for the delegator
function checkpointDelegator(
mapping(uint256 => IVotingEscrow.LockedBalance) storage _locked,
mapping(uint256 => uint48) storage _numCheckpoints,
mapping(uint256 => mapping(uint48 => IVotingEscrow.Checkpoint)) storage _checkpoints,
mapping(uint256 => uint256) storage _delegates,
uint256 _delegator,
uint256 _delegatee,
address _owner
) external {
uint256 delegatedBalance = uint256(uint128(_locked[_delegator].amount));
uint48 numCheckpoint = _numCheckpoints[_delegator];
IVotingEscrow.Checkpoint storage cpOld = numCheckpoint > 0
? _checkpoints[_delegator][numCheckpoint - 1]
: _checkpoints[_delegator][0];
// Dedelegate from delegatee if delegated
checkpointDelegatee(_numCheckpoints, _checkpoints, cpOld.delegatee, delegatedBalance, false);
IVotingEscrow.Checkpoint storage cp = _checkpoints[_delegator][numCheckpoint];
cp.fromTimestamp = block.timestamp;
cp.delegatedBalance = cpOld.delegatedBalance;
cp.delegatee = _delegatee;
cp.owner = _owner;
if (_isCheckpointInNewBlock(_numCheckpoints, _checkpoints, _delegator)) {
_numCheckpoints[_delegator]++;
} else {
_checkpoints[_delegator][numCheckpoint - 1] = cp;
delete _checkpoints[_delegator][numCheckpoint];
}
_delegates[_delegator] = _delegatee;
}
/// @notice Update delegatee's `delegatedBalance` by `balance`.
/// Only updates if delegating to a new delegatee.
/// @dev If used with `balance` == `_locked[_tokenId].amount`, then this is the same as
/// delegating or dedelegating from `_tokenId`
/// If used with `balance` < `_locked[_tokenId].amount`, then this is used to adjust
/// `delegatedBalance` when a user's balance is modified (e.g. `increaseAmount`, `merge` etc).
/// If `delegatee` is 0 (i.e. user is not delegating), then do nothing.
/// @param _numCheckpoints State of all user checkpoint counts
/// @param _checkpoints State of all user checkpoints
/// @param _delegatee The delegatee's tokenId
/// @param balance_ The delta in balance change
/// @param _increase True if balance is increasing, false if decreasing
function checkpointDelegatee(
mapping(uint256 => uint48) storage _numCheckpoints,
mapping(uint256 => mapping(uint48 => IVotingEscrow.Checkpoint)) storage _checkpoints,
uint256 _delegatee,
uint256 balance_,
bool _increase
) public {
if (_delegatee == 0) return;
uint48 numCheckpoint = _numCheckpoints[_delegatee];
IVotingEscrow.Checkpoint storage cpOld = numCheckpoint > 0
? _checkpoints[_delegatee][numCheckpoint - 1]
: _checkpoints[_delegatee][0];
IVotingEscrow.Checkpoint storage cp = _checkpoints[_delegatee][numCheckpoint];
cp.fromTimestamp = block.timestamp;
cp.owner = cpOld.owner;
// do not expect balance_ > cpOld.delegatedBalance when decrementing but just in case
cp.delegatedBalance = _increase
? cpOld.delegatedBalance + balance_
: (balance_ < cpOld.delegatedBalance ? cpOld.delegatedBalance - balance_ : 0);
cp.delegatee = cpOld.delegatee;
if (_isCheckpointInNewBlock(_numCheckpoints, _checkpoints, _delegatee)) {
_numCheckpoints[_delegatee]++;
} else {
_checkpoints[_delegatee][numCheckpoint - 1] = cp;
delete _checkpoints[_delegatee][numCheckpoint];
}
}
function _isCheckpointInNewBlock(
mapping(uint256 => uint48) storage _numCheckpoints,
mapping(uint256 => mapping(uint48 => IVotingEscrow.Checkpoint)) storage _checkpoints,
uint256 _tokenId
) internal view returns (bool) {
uint48 _nCheckPoints = _numCheckpoints[_tokenId];
if (_nCheckPoints > 0 && _checkpoints[_tokenId][_nCheckPoints - 1].fromTimestamp == block.timestamp) {
return false;
} else {
return true;
}
}
/// @notice Binary search to get the voting checkpoint for a token id at or prior to a given timestamp.
/// @dev If a checkpoint does not exist prior to the timestamp, this will return 0.
/// @param _numCheckpoints State of all user checkpoint counts
/// @param _checkpoints State of all user checkpoints
/// @param _tokenId .
/// @param _timestamp .
/// @return The index of the checkpoint.
function getPastVotesIndex(
mapping(uint256 => uint48) storage _numCheckpoints,
mapping(uint256 => mapping(uint48 => IVotingEscrow.Checkpoint)) storage _checkpoints,
uint256 _tokenId,
uint256 _timestamp
) internal view returns (uint48) {
uint48 nCheckpoints = _numCheckpoints[_tokenId];
if (nCheckpoints == 0) return 0;
// First check most recent balance
if (_checkpoints[_tokenId][nCheckpoints - 1].fromTimestamp <= _timestamp) return (nCheckpoints - 1);
// Next check implicit zero balance
if (_checkpoints[_tokenId][0].fromTimestamp > _timestamp) return 0;
uint48 lower = 0;
uint48 upper = nCheckpoints - 1;
while (upper > lower) {
uint48 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
IVotingEscrow.Checkpoint storage cp = _checkpoints[_tokenId][center];
if (cp.fromTimestamp == _timestamp) {
return center;
} else if (cp.fromTimestamp < _timestamp) {
lower = center;
} else {
upper = center - 1;
}
}
return lower;
}
/// @notice Retrieves historical voting balance for a token id at a given timestamp.
/// @dev If a checkpoint does not exist prior to the timestamp, this will return 0.
/// The user must also own the token at the time in order to receive a voting balance.
/// @param _numCheckpoints State of all user checkpoint counts
/// @param _checkpoints State of all user checkpoints
/// @param _account .
/// @param _tokenId .
/// @param _timestamp .
/// @return Total voting balance including delegations at a given timestamp.
function getPastVotes(
mapping(uint256 => uint48) storage _numCheckpoints,
mapping(uint256 => mapping(uint48 => IVotingEscrow.Checkpoint)) storage _checkpoints,
address _account,
uint256 _tokenId,
uint256 _timestamp
) external view returns (uint256) {
uint48 _checkIndex = getPastVotesIndex(_numCheckpoints, _checkpoints, _tokenId, _timestamp);
IVotingEscrow.Checkpoint memory lastCheckpoint = _checkpoints[_tokenId][_checkIndex];
// If no point exists prior to the given timestamp, return 0
if (lastCheckpoint.fromTimestamp > _timestamp) return 0;
// Check ownership
if (_account != lastCheckpoint.owner) return 0;
uint256 votes = lastCheckpoint.delegatedBalance;
return
lastCheckpoint.delegatee == 0
? votes + IVotingEscrow(address(this)).balanceOfNFTAt(_tokenId, _timestamp)
: votes;
}
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.19;
import {IVotingEscrow} from "../interfaces/IVotingEscrow.sol";
library BalanceLogicLibrary {
uint256 internal constant WEEK = 1 weeks;
/// @notice Binary search to get the user point index for a token id at or prior to a given timestamp
/// @dev If a user point does not exist prior to the timestamp, this will return 0.
/// @param _userPointEpoch State of all user point epochs
/// @param _userPointHistory State of all user point history
/// @param _tokenId .
/// @param _timestamp .
/// @return User point index
function getPastUserPointIndex(
mapping(uint256 => uint256) storage _userPointEpoch,
mapping(uint256 => IVotingEscrow.UserPoint[1000000000]) storage _userPointHistory,
uint256 _tokenId,
uint256 _timestamp
) internal view returns (uint256) {
uint256 _userEpoch = _userPointEpoch[_tokenId];
if (_userEpoch == 0) return 0;
// First check most recent balance
if (_userPointHistory[_tokenId][_userEpoch].ts <= _timestamp) return (_userEpoch);
// Next check implicit zero balance
if (_userPointHistory[_tokenId][1].ts > _timestamp) return 0;
uint256 lower = 0;
uint256 upper = _userEpoch;
while (upper > lower) {
uint256 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
IVotingEscrow.UserPoint storage userPoint = _userPointHistory[_tokenId][center];
if (userPoint.ts == _timestamp) {
return center;
} else if (userPoint.ts < _timestamp) {
lower = center;
} else {
upper = center - 1;
}
}
return lower;
}
/// @notice Binary search to get the global point index at or prior to a given timestamp
/// @dev If a checkpoint does not exist prior to the timestamp, this will return 0.
/// @param _epoch Current global point epoch
/// @param _pointHistory State of all global point history
/// @param _timestamp .
/// @return Global point index
function getPastGlobalPointIndex(
uint256 _epoch,
mapping(uint256 => IVotingEscrow.GlobalPoint) storage _pointHistory,
uint256 _timestamp
) internal view returns (uint256) {
if (_epoch == 0) return 0;
// First check most recent balance
if (_pointHistory[_epoch].ts <= _timestamp) return (_epoch);
// Next check implicit zero balance
if (_pointHistory[1].ts > _timestamp) return 0;
uint256 lower = 0;
uint256 upper = _epoch;
while (upper > lower) {
uint256 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
IVotingEscrow.GlobalPoint storage globalPoint = _pointHistory[center];
if (globalPoint.ts == _timestamp) {
return center;
} else if (globalPoint.ts < _timestamp) {
lower = center;
} else {
upper = center - 1;
}
}
return lower;
}
/// @notice Get the current voting power for `_tokenId`
/// @dev Adheres to the ERC20 `balanceOf` interface for Aragon compatibility
/// Fetches last user point prior to a certain timestamp, then walks forward to timestamp.
/// @param _userPointEpoch State of all user point epochs
/// @param _userPointHistory State of all user point history
/// @param _tokenId NFT for lock
/// @param _t Epoch time to return voting power at
/// @return User voting power
function balanceOfNFTAt(
mapping(uint256 => uint256) storage _userPointEpoch,
mapping(uint256 => IVotingEscrow.UserPoint[1000000000]) storage _userPointHistory,
uint256 _tokenId,
uint256 _t
) external view returns (uint256) {
uint256 _epoch = getPastUserPointIndex(_userPointEpoch, _userPointHistory, _tokenId, _t);
// epoch 0 is an empty point
if (_epoch == 0) return 0;
IVotingEscrow.UserPoint memory lastPoint = _userPointHistory[_tokenId][_epoch];
if (lastPoint.permanent != 0) {
return lastPoint.permanent;
} else {
lastPoint.bias -= lastPoint.slope * int128(int256(_t) - int256(lastPoint.ts));
if (lastPoint.bias < 0) {
lastPoint.bias = 0;
}
return uint256(int256(lastPoint.bias));
}
}
/// @notice Calculate total voting power at some point in the past
/// @param _slopeChanges State of all slopeChanges
/// @param _pointHistory State of all global point history
/// @param _epoch The epoch to start search from
/// @param _t Time to calculate the total voting power at
/// @return Total voting power at that time
function supplyAt(
mapping(uint256 => int128) storage _slopeChanges,
mapping(uint256 => IVotingEscrow.GlobalPoint) storage _pointHistory,
uint256 _epoch,
uint256 _t
) external view returns (uint256) {
uint256 epoch_ = getPastGlobalPointIndex(_epoch, _pointHistory, _t);
// epoch 0 is an empty point
if (epoch_ == 0) return 0;
IVotingEscrow.GlobalPoint memory _point = _pointHistory[epoch_];
int128 bias = _point.bias;
int128 slope = _point.slope;
uint256 ts = _point.ts;
uint256 t_i = (ts / WEEK) * WEEK;
for (uint256 i = 0; i < 255; ++i) {
t_i += WEEK;
int128 dSlope = 0;
if (t_i > _t) {
t_i = _t;
} else {
dSlope = _slopeChanges[t_i];
}
bias -= slope * int128(int256(t_i - ts));
if (t_i == _t) {
break;
}
slope += dSlope;
ts = t_i;
}
if (bias < 0) {
bias = 0;
}
return uint256(uint128(bias)) + _point.permanentLockBalance;
}
}// 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
pragma solidity ^0.8.0;
import "./IERC165.sol";
import "./IERC721.sol";
/// @title EIP-721 Metadata Update Extension
interface IERC4906 is IERC165, IERC721 {
/// @dev This event emits when the metadata of a token is changed.
/// So that the third-party platforms such as NFT market could
/// timely update the images and related attributes of the NFT.
event MetadataUpdate(uint256 _tokenId);
/// @dev This event emits when the metadata of a range of tokens is changed.
/// So that the third-party platforms such as NFT market could
/// timely update the images and related attributes of the NFTs.
event BatchMetadataUpdate(uint256 _fromTokenId, uint256 _toTokenId);
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
/// Modified IVotes interface for tokenId based voting
interface IVotes {
/**
* @dev Emitted when an account changes their delegate.
*/
event DelegateChanged(address indexed delegator, uint256 indexed fromDelegate, uint256 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 amount of votes that `tokenId` had at a specific moment in the past.
* If the account passed in is not the owner, returns 0.
*/
function getPastVotes(address account, uint256 tokenId, uint256 timepoint) external view returns (uint256);
/**
* @dev Returns the total supply of votes available at a specific moment in the past. If the `clock()` is
* configured to use block numbers, this will return the value the end of the corresponding block.
*
* 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 timepoint) external view returns (uint256);
/**
* @dev Returns the delegate that `tokenId` has chosen. Can never be equal to the delegator's `tokenId`.
* Returns 0 if not delegated.
*/
function delegates(uint256 tokenId) external view returns (uint256);
/**
* @dev Delegates votes from the sender to `delegatee`.
*/
function delegate(uint256 delegator, uint256 delegatee) external;
/**
* @dev Delegates votes from `delegator` to `delegatee`. Signer must own `delegator`.
*/
function delegateBySig(
uint256 delegator,
uint256 delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) external;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [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://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts 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 (last updated v4.8.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* 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 (interfaces/IERC165.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165.sol";
// 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 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);
}{
"remappings": [
"@opengsn/=lib/gsn/packages/",
"@openzeppelin/=lib/openzeppelin-contracts/",
"@uniswap/v3-core/=lib/v3-core/",
"concentrated-liquidity/=lib/concentrated-liquidity/",
"ds-test/=lib/ds-test/src/",
"erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
"eth-gas-reporter/=node_modules/eth-gas-reporter/",
"forge-std/=lib/forge-std/src/",
"gsn/=lib/gsn/",
"hardhat-deploy/=node_modules/hardhat-deploy/",
"hardhat/=node_modules/hardhat/",
"openzeppelin-contracts/=lib/openzeppelin-contracts/",
"utils/=test/utils/",
"v3-core/=lib/v3-core/"
],
"optimizer": {
"enabled": true,
"runs": 200
},
"metadata": {
"bytecodeHash": "ipfs",
"appendCBOR": true
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"evmVersion": "paris",
"libraries": {
"contracts/art/PerlinNoise.sol": {
"PerlinNoise": "0x08947e304064b3f3ef2b99fca7e549c5fc3f75d4"
},
"contracts/art/Trig.sol": {
"Trig": "0xbdd6f9662e904a9176aafcbdded45d076b5170ef"
},
"contracts/libraries/BalanceLogicLibrary.sol": {
"BalanceLogicLibrary": "0x79bca9bcc19e157cb5f8c5a2f4d6cb951b1f8dce"
},
"contracts/libraries/DelegationLogicLibrary.sol": {
"DelegationLogicLibrary": "0x73746410b0dd4526e1fa00d0854e99ba54aefd30"
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000006824df38d1d77eadeb6bafcb03904e27429ab740000000000000000000000009560e827af36c94d2ac33a39bce1fe78631088db000000000000000000000000f4c67cdeaab8360370f41514d06e32ccd8aa1d7b
-----Decoded View---------------
Arg [0] : _forwarder (address): 0x06824df38D1D77eADEB6baFCB03904E27429Ab74
Arg [1] : _token (address): 0x9560e827aF36c94D2Ac33a39bCE1Fe78631088Db
Arg [2] : _factoryRegistry (address): 0xF4c67CdEAaB8360370F41514d06e32CcD8aA1d7B
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000006824df38d1d77eadeb6bafcb03904e27429ab74
Arg [1] : 0000000000000000000000009560e827af36c94d2ac33a39bce1fe78631088db
Arg [2] : 000000000000000000000000f4c67cdeaab8360370f41514d06e32ccd8aa1d7b
[ Download: CSV Export ]
[ Download: CSV Export ]
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