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Overview
TokenID
7797
Total Transfers
-
Market
Onchain Market Cap
$0.03
Circulating Supply Market Cap
$137,208.00
Other Info
Token Contract
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Contract Name:
MaxxStake
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/security/Pausable.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; import "@openzeppelin/contracts/utils/Counters.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {ILiquidityAmplifier} from "./interfaces/ILiquidityAmplifier.sol"; import {IMaxxFinance} from "./interfaces/IMaxxFinance.sol"; import {IMAXXBoost} from "./interfaces/IMAXXBoost.sol"; import {IFreeClaim} from "./interfaces/IFreeClaim.sol"; import {IStake} from "./interfaces/IStake.sol"; /// @title Maxx Finance staking contract /// @author Alta Web3 Labs - SonOfMosiah contract MaxxStake is IStake, ERC721, ERC721Enumerable, Ownable, Pausable, ReentrancyGuard { using ERC165Checker for address; using Counters for Counters.Counter; using Strings for uint256; /// mapping of accepted NFTs mapping(address => bool) public isAcceptedNft; /// @dev 10 = 10% boost mapping(address => uint256) public nftBonus; /// mapping of stake end times mapping(uint256 => uint256) public endTimes; // Calculation variables uint256 public constant LATE_DAYS = 14; uint256 public constant MIN_STAKE_DAYS = 7; uint256 public constant MAX_STAKE_DAYS = 3333; uint256 public constant BASE_INFLATION = 18_185; // 18.185% uint256 public constant BASE_INFLATION_FACTOR = 100_000; uint256 public constant DAYS_IN_YEAR = 365; uint256 public constant PERCENT_FACTOR = 1e10; uint256 public constant MAGIC_NUMBER = 1111; uint256 public constant BPB_FACTOR = 2e24; uint256 private constant _SHARE_FACTOR = 1e9; uint256 private constant _MIN_STAKE_AMOUNT = 25_000 * (10**18); uint256 public launchDate; /// @notice Maxx Finance Vault address address public maxxVault; /// @notice address of the freeClaim contract address public freeClaim; /// @notice address of the liquidityAmplifier contract address public liquidityAmplifier; /// @notice Maxx Finance token IMaxxFinance public maxx; /// @notice amount of shares all time uint256 public totalShares; /// @notice Stake Counter Counters.Counter public idCounter; /// @notice alltime stakes Counters.Counter public totalStakesAlltime; /// @notice all active stakes Counters.Counter public totalStakesActive; /// @notice number of withdrawn stakes Counters.Counter public totalStakesWithdrawn; /// @notice Array of all stakes StakeData[] public stakes; // Base URI string private _baseUri; uint256 private _lastMigrationValue; bool public initialized; constructor() ERC721("MaxxStake", "SMAXX") { _transferOwnership(tx.origin); } /// @dev Sets the `maxxVault` and `maxx` addresses and the `launchDate` function init( address _maxxVault, address _maxx, uint256 _launchDate ) external onlyOwner { if (initialized) { revert AlreadyInitialized(); } initialized = true; maxxVault = _maxxVault; maxx = IMaxxFinance(_maxx); launchDate = _launchDate; // launch date needs to be at least 60 days after liquidity amplifier start date // start stake ID at 1 idCounter.increment(); stakes.push(StakeData("", address(0), 0, 0, 0, 0, false)); // index 0 is null stake; } /// @notice Function to stake MAXX /// @dev User must approve MAXX before staking /// @param _numDays The number of days to stake (min 7, max 3333) /// @param _amount The amount of MAXX to stake function stake(uint256 _numDays, uint256 _amount) external { if (_amount < _MIN_STAKE_AMOUNT) { revert InvalidAmount(); } uint256 shares = _calcShares(_numDays, _amount); _stake(msg.sender, _numDays, _amount, shares); } /// @notice Function to stake MAXX /// @dev User must approve MAXX before staking /// @param _numDays The number of days to stake (min 7, max 3333) /// @param _amount The amount of MAXX to stake /// @param _tokenId // The token Id of the nft to use /// @param _maxxNFT // The address of the nft collection to use function stake( uint256 _numDays, uint256 _amount, uint256 _tokenId, address _maxxNFT ) external { if (_amount < _MIN_STAKE_AMOUNT) { revert InvalidAmount(); } if (!isAcceptedNft[_maxxNFT]) { revert NftNotAccepted(); } if (msg.sender != IMAXXBoost(_maxxNFT).ownerOf(_tokenId)) { revert IncorrectOwner(); } else if (IMAXXBoost(_maxxNFT).getUsedState(_tokenId)) { revert UsedNFT(); } IMAXXBoost(_maxxNFT).setUsed(_tokenId); uint256 shares = _calcShares(_numDays, _amount); shares += ((shares * nftBonus[_maxxNFT]) / 100); // add nft bonus to the shares _stake(msg.sender, _numDays, _amount, shares); } /// @notice Function to unstake MAXX /// @param _stakeId The id of the stake to unstake function unstake(uint256 _stakeId) external { StakeData memory tStake = stakes[_stakeId]; if (!_isApprovedOrOwner(msg.sender, _stakeId)) { revert NotAuthorized(); } if (tStake.withdrawn) { revert StakeAlreadyWithdrawn(); } stakes[_stakeId].withdrawn = true; totalStakesWithdrawn.increment(); totalStakesActive.decrement(); _burn(_stakeId); uint256 withdrawableAmount; uint256 penaltyAmount; uint256 daysServed = ((block.timestamp - tStake.startDate) / 1 days); uint256 interestToDate = _calcInterestToDate( tStake.shares, daysServed, tStake.duration ); uint256 fullAmount = tStake.amount + interestToDate; if (daysServed < (tStake.duration / 1 days)) { // unstaking early // fee assessed withdrawableAmount = ((tStake.amount + interestToDate) * daysServed) / (tStake.duration / 1 days); } else if (daysServed > (tStake.duration / 1 days) + LATE_DAYS) { // unstaking late // fee assessed uint256 daysLate = daysServed - (tStake.duration / 1 days) - LATE_DAYS; uint256 penaltyPercentage = (PERCENT_FACTOR * daysLate) / DAYS_IN_YEAR; if (penaltyPercentage > PERCENT_FACTOR) { withdrawableAmount = 0; } else { withdrawableAmount = ((tStake.amount + interestToDate) * (PERCENT_FACTOR - penaltyPercentage)) / PERCENT_FACTOR; } } else { // unstaking on time withdrawableAmount = tStake.amount + interestToDate; } penaltyAmount = fullAmount - withdrawableAmount; uint256 maxxBalance = maxx.balanceOf(address(this)); if (fullAmount > maxxBalance) { maxx.mint(address(this), fullAmount - maxxBalance); // mint additional tokens to this contract } if (withdrawableAmount > 0) { if (!maxx.transfer(msg.sender, withdrawableAmount)) { // transfer the withdrawable amount to the user revert TransferFailed(); } } if (penaltyAmount > 0) { if (!maxx.transfer(maxxVault, penaltyAmount / 2)) { // transfer half the penalty amount to the maxx vault revert TransferFailed(); } maxx.burn(penaltyAmount / 2); // burn the other half of the penalty amount } emit Unstake(_stakeId, msg.sender, withdrawableAmount); } /// @notice Function to transfer stake ownership /// @param _to The new owner of the stake /// @param _stakeId The id of the stake function transfer(address _to, uint256 _stakeId) external { address stakeOwner = ownerOf(_stakeId); if (msg.sender != stakeOwner) { revert NotAuthorized(); } _transfer(msg.sender, _to, _stakeId); } /// @notice This function changes the name of a stake /// @param _stakeId The id of the stake /// @param _stakeName The new name of the stake function changeStakeName(uint256 _stakeId, string memory _stakeName) external { address stakeOwner = ownerOf(_stakeId); if ( msg.sender != stakeOwner && !isApprovedForAll(stakeOwner, msg.sender) ) { revert NotAuthorized(); } stakes[_stakeId].name = _stakeName; emit StakeNameChange(_stakeId, _stakeName); } /// @notice Function to stake MAXX from liquidity amplifier contract /// @param _numDays The number of days to stake for /// @param _amount The amount of MAXX to stake function amplifierStake( address _owner, uint256 _numDays, uint256 _amount ) external returns (uint256 stakeId, uint256 shares) { if (msg.sender != liquidityAmplifier) { revert NotAuthorized(); } shares = _calcShares(_numDays, _amount); if (_numDays >= DAYS_IN_YEAR) { shares = (shares * 11) / 10; } stakeId = _stake(_owner, _numDays, _amount, shares); return (stakeId, shares); } /// @notice Function to stake MAXX from FreeClaim contract /// @param _owner The owner of the stake /// @param _numDays The number of days to stake for /// @param _amount The amount of MAXX to stake function freeClaimStake( address _owner, uint256 _numDays, uint256 _amount ) external returns (uint256 stakeId, uint256 shares) { if (msg.sender != freeClaim) { revert NotAuthorized(); } shares = _calcShares(_numDays, _amount); stakeId = _stake(_owner, _numDays, _amount, shares); return (stakeId, shares); } /// @notice Stake unstaked free claims in batches /// @param amount The amount of free claims to stake function migrateUnstakedFreeClaims(uint256 amount) external onlyOwner { uint256[] memory claimIds = IFreeClaim(freeClaim) .getUnstakedClaimsSlice( _lastMigrationValue, _lastMigrationValue + amount ); for (uint256 i = 0; i < amount; i++) { IFreeClaim(freeClaim).stakeClaim( _lastMigrationValue + i, claimIds[i] ); } _lastMigrationValue += amount; } /// @notice Burn stakes that are over a year late /// @param stakeIds The ids of the stakes to burn function burnDeadStakes(uint256[] calldata stakeIds) external onlyOwner { uint256 penaltyAmount; for (uint256 i = 0; i < stakeIds.length; i++) { StakeData memory tStake = stakes[stakeIds[i]]; uint256 daysServed = (block.timestamp - tStake.startDate) / 1 days; uint256 interestToDate = _calcInterestToDate( tStake.shares, daysServed, tStake.duration ); uint256 fullAmount = tStake.amount + interestToDate; uint256 daysLate = daysServed - (tStake.duration / 1 days); if (daysLate > DAYS_IN_YEAR && !tStake.withdrawn) { stakes[stakeIds[i]].withdrawn = true; totalStakesWithdrawn.increment(); totalStakesActive.decrement(); _burn(stakeIds[i]); penaltyAmount += fullAmount; emit Unstake(stakeIds[i], tStake.owner, 0); } } uint256 maxxBalance = maxx.balanceOf(address(this)); if (penaltyAmount > maxxBalance) { maxx.mint(address(this), penaltyAmount - maxxBalance); } if (penaltyAmount > 0) { if (!maxx.transfer(maxxVault, penaltyAmount / 2)) { // transfer half the penalty amount to the maxx vault revert TransferFailed(); } maxx.burn(penaltyAmount / 2); // burn the other half of the penalty amount } } /// @notice Funciton to set liquidityAmplifier contract address /// @param _liquidityAmplifier The address of the liquidityAmplifier contract function setLiquidityAmplifier(address _liquidityAmplifier) external onlyOwner { liquidityAmplifier = _liquidityAmplifier; emit LiquidityAmplifierSet(_liquidityAmplifier); } /// @notice Function to set freeClaim contract address /// @param _freeClaim The address of the freeClaim contract function setFreeClaim(address _freeClaim) external onlyOwner { freeClaim = _freeClaim; emit FreeClaimSet(_freeClaim); } /// @notice Add an accepted NFT /// @param _nft The address of the NFT contract function addAcceptedNft(address _nft) external onlyOwner { isAcceptedNft[_nft] = true; emit AcceptedNftAdded(_nft); } /// @notice Remove an accepted NFT /// @param _nft The address of the NFT to remove function removeAcceptedNft(address _nft) external onlyOwner { isAcceptedNft[_nft] = false; emit AcceptedNftRemoved(_nft); } /// @notice Set the staking bonus for `_nft` to `_bonus` /// @param _nft The NFT contract address /// @param _bonus The bonus percentage (e.g. 20 = 20%) function setNftBonus(address _nft, uint256 _bonus) external onlyOwner { nftBonus[_nft] = _bonus; emit NftBonusSet(_nft, _bonus); } /// @notice Set the baseURI for the token collection /// @param baseURI_ The baseURI for the token collection function setBaseURI(string memory baseURI_) external onlyOwner { _baseUri = baseURI_; emit BaseURISet(baseURI_); } /// @notice Function to change the start date /// @dev Cannot change the start date after the day has passed /// @param _launchDate New start date function changeLaunchDate(uint256 _launchDate) external onlyOwner { if (block.timestamp >= launchDate || block.timestamp >= _launchDate) { revert LaunchDatePassed(); } launchDate = _launchDate; emit LaunchDateUpdated(_launchDate); } /// @notice Get the stakes array /// @return stakes The stakes array function getAllStakes() external view returns (StakeData[] memory) { return stakes; } /// @notice Get the `count` stakes starting from `index` /// @param index The index to start from /// @param count The number of stakes to return /// @return result An array of StakeData function getStakes(uint256 index, uint256 count) external view returns (StakeData[] memory result) { uint256 inserts; for (uint256 i = index; i < index + count; i++) { result[inserts] = (stakes[i]); ++inserts; } return result; } /// @notice This function will return day `day` since the launch date /// @return day The number of days passed since `launchDate` function getDaysSinceLaunch() public view returns (uint256 day) { day = (block.timestamp - launchDate) / 1 days; return day; } /// @notice Function that returns whether `interfaceId` is supported by this contract /// @param interfaceId The interface ID to check /// @return Whether `interfaceId` is supported function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable, IERC165) returns (bool) { return super.supportsInterface(interfaceId); } /// @notice Returns the token URI /// @param stakeId The id of the stake /// @return The token URI function tokenURI(uint256 stakeId) public view virtual override returns (string memory) { _requireMinted(stakeId); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, stakeId.toString())) : ""; } /// @return shareFactor The current share factor function getShareFactor() public view returns (uint256 shareFactor) { uint256 day = getDaysSinceLaunch(); if (day >= MAX_STAKE_DAYS) { return 0; } shareFactor = _SHARE_FACTOR - ((getDaysSinceLaunch() * _SHARE_FACTOR) / MAX_STAKE_DAYS); return shareFactor; } function _stake( address _owner, uint256 _numDays, uint256 _amount, uint256 _shares ) internal returns (uint256 stakeId) { // Check that stake duration is valid if (_numDays < MIN_STAKE_DAYS) { revert StakeTooShort(); } else if (_numDays > MAX_STAKE_DAYS) { revert StakeTooLong(); } if ( maxx.hasRole(maxx.MINTER_ROLE(), msg.sender) && maxx.balanceOf(_owner) == _amount && msg.sender != freeClaim && msg.sender != liquidityAmplifier ) { maxx.mint(msg.sender, 1); } // transfer tokens to this contract -- removed from circulating supply if (!maxx.transferFrom(msg.sender, address(this), _amount)) { revert TransferFailed(); } totalShares += _shares; totalStakesAlltime.increment(); totalStakesActive.increment(); uint256 duration = uint256(_numDays) * 1 days; stakeId = idCounter.current(); assert(stakeId == stakes.length); stakes.push( StakeData( "", _owner, _amount, _shares, duration, block.timestamp, false ) ); endTimes[stakeId] = block.timestamp + duration; _mint(_owner, stakeId); emit Stake(idCounter.current(), _owner, _numDays, _amount); idCounter.increment(); return stakeId; } function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal override(ERC721, ERC721Enumerable) { stakes[tokenId].owner = to; super._beforeTokenTransfer(from, to, tokenId); } /// @dev Calculate shares using following formula: (amount / (2-SF)) + (((amount / (2-SF)) * (Duration-1)) / MN) /// @return shares The number of shares for the full-term stake function _calcShares(uint256 duration, uint256 _amount) internal view returns (uint256 shares) { uint256 shareFactor = getShareFactor(); uint256 basicShares = (_amount * _SHARE_FACTOR) / ((2 * _SHARE_FACTOR) - shareFactor); uint256 bpbBonus = _amount / (BPB_FACTOR / 10); if (bpbBonus > 100) { bpbBonus = 100; } uint256 bpbShares = (basicShares * bpbBonus) / 1_000; // bigger pays better uint256 lpbShares = ((basicShares + bpbShares) * (duration - 1)) / MAGIC_NUMBER; // longer pays better shares = basicShares + bpbShares + lpbShares; return shares; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overridden in child contracts. */ function _baseURI() internal view virtual override returns (string memory) { return _baseUri; } /// @dev Calculate interest for a given number of shares and duration /// @return interestToDate The interest accrued to date function _calcInterestToDate( uint256 _stakeTotalShares, uint256 _daysServed, uint256 _duration ) internal pure returns (uint256 interestToDate) { uint256 stakeDuration = _duration / 1 days; uint256 fullDurationInterest = (_stakeTotalShares * BASE_INFLATION * stakeDuration) / DAYS_IN_YEAR / BASE_INFLATION_FACTOR; uint256 currentDurationInterest = (_daysServed * _stakeTotalShares * stakeDuration * BASE_INFLATION) / stakeDuration / BASE_INFLATION_FACTOR / DAYS_IN_YEAR; if (currentDurationInterest > fullDurationInterest) { interestToDate = fullDurationInterest; } else { interestToDate = currentDurationInterest; } return interestToDate; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { require(!paused(), "Pausable: paused"); } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { require(paused(), "Pausable: not paused"); } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: address zero is not a valid owner"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: invalid token ID"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { _requireMinted(tokenId); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not token owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { _requireMinted(tokenId); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner nor approved"); _safeTransfer(from, to, tokenId, data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { address owner = ERC721.ownerOf(tokenId); return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits an {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits an {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Reverts if the `tokenId` has not been minted yet. */ function _requireMinted(uint256 tokenId) internal view virtual { require(_exists(tokenId), "ERC721: invalid token ID"); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { /// @solidity memory-safe-assembly assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol) pragma solidity ^0.8.0; import "../ERC721.sol"; import "./IERC721Enumerable.sol"; /** * @dev This implements an optional extension of {ERC721} defined in the EIP that adds * enumerability of all the token ids in the contract as well as all token ids owned by each * account. */ abstract contract ERC721Enumerable is ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => mapping(uint256 => uint256)) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) { return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds"); return _ownedTokens[owner][index]; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); if (from == address(0)) { _addTokenToAllTokensEnumeration(tokenId); } else if (from != to) { _removeTokenFromOwnerEnumeration(from, tokenId); } if (to == address(0)) { _removeTokenFromAllTokensEnumeration(tokenId); } else if (to != from) { _addTokenToOwnerEnumeration(to, tokenId); } } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { uint256 length = ERC721.balanceOf(to); _ownedTokens[to][length] = tokenId; _ownedTokensIndex[tokenId] = length; } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = ERC721.balanceOf(from) - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Counters.sol) pragma solidity ^0.8.0; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` */ library Counters { struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { unchecked { counter._value += 1; } } function decrement(Counter storage counter) internal { uint256 value = counter._value; require(value > 0, "Counter: decrement overflow"); unchecked { counter._value = value - 1; } } function reset(Counter storage counter) internal { counter._value = 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.2) (utils/introspection/ERC165Checker.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Library used to query support of an interface declared via {IERC165}. * * Note that these functions return the actual result of the query: they do not * `revert` if an interface is not supported. It is up to the caller to decide * what to do in these cases. */ library ERC165Checker { // As per the EIP-165 spec, no interface should ever match 0xffffffff bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff; /** * @dev Returns true if `account` supports the {IERC165} interface, */ function supportsERC165(address account) internal view returns (bool) { // Any contract that implements ERC165 must explicitly indicate support of // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid return _supportsERC165Interface(account, type(IERC165).interfaceId) && !_supportsERC165Interface(account, _INTERFACE_ID_INVALID); } /** * @dev Returns true if `account` supports the interface defined by * `interfaceId`. Support for {IERC165} itself is queried automatically. * * See {IERC165-supportsInterface}. */ function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) { // query support of both ERC165 as per the spec and support of _interfaceId return supportsERC165(account) && _supportsERC165Interface(account, interfaceId); } /** * @dev Returns a boolean array where each value corresponds to the * interfaces passed in and whether they're supported or not. This allows * you to batch check interfaces for a contract where your expectation * is that some interfaces may not be supported. * * See {IERC165-supportsInterface}. * * _Available since v3.4._ */ function getSupportedInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool[] memory) { // an array of booleans corresponding to interfaceIds and whether they're supported or not bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length); // query support of ERC165 itself if (supportsERC165(account)) { // query support of each interface in interfaceIds for (uint256 i = 0; i < interfaceIds.length; i++) { interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]); } } return interfaceIdsSupported; } /** * @dev Returns true if `account` supports all the interfaces defined in * `interfaceIds`. Support for {IERC165} itself is queried automatically. * * Batch-querying can lead to gas savings by skipping repeated checks for * {IERC165} support. * * See {IERC165-supportsInterface}. */ function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) { // query support of ERC165 itself if (!supportsERC165(account)) { return false; } // query support of each interface in _interfaceIds for (uint256 i = 0; i < interfaceIds.length; i++) { if (!_supportsERC165Interface(account, interfaceIds[i])) { return false; } } // all interfaces supported return true; } /** * @notice Query if a contract implements an interface, does not check ERC165 support * @param account The address of the contract to query for support of an interface * @param interfaceId The interface identifier, as specified in ERC-165 * @return true if the contract at account indicates support of the interface with * identifier interfaceId, false otherwise * @dev Assumes that account contains a contract that supports ERC165, otherwise * the behavior of this method is undefined. This precondition can be checked * with {supportsERC165}. * Interface identification is specified in ERC-165. */ function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) { // prepare call bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId); // perform static call bool success; uint256 returnSize; uint256 returnValue; assembly { success := staticcall(30000, account, add(encodedParams, 0x20), mload(encodedParams), 0x00, 0x20) returnSize := returndatasize() returnValue := mload(0x00) } return success && returnSize >= 0x20 && returnValue > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @title The interface for the Maxx Finance liquidity amplifier contract interface ILiquidityAmplifier { /// Invalid referrer address `referrer` /// @param referrer The address of the referrer error InvalidReferrer(address referrer); /// Liquidity Amplifier has not yet started error AmplifierNotStarted(); ///Liquidity Amplifier is already complete error AmplifierComplete(); /// Liquidity Amplifier is not complete error AmplifierNotComplete(); /// Claim period has ended error ClaimExpired(); /// Invalid input day /// @param day The amplifier day 1-60 error InvalidDay(uint256 day); /// User has already claimed for this day /// @param day The amplifier day 1-60 error AlreadyClaimed(uint256 day); /// User has already claimed referral rewards error AlreadyClaimedReferrals(); /// The Maxx allocation has already been initialized error AlreadyInitialized(); /// The Maxx Finance Staking contract hasn't been initialized error StakingNotInitialized(); /// Current or proposed launch date has already passed error LaunchDatePassed(); /// Unable to withdraw Matic error WithdrawFailed(); /// MaxxGenesis address not set error MaxxGenesisNotSet(); /// MaxxGenesis NFT not minted error MaxxGenesisMintFailed(); /// Maxx transfer failed error MaxxTransferFailed(); error ZeroAddress(); error PastLaunchDate(); /// @notice Emitted when matic is 'deposited' /// @param user The user depositing matic into the liquidity amplifier /// @param amount The amount of matic depositied /// @param referrer The address of the referrer (0x0 if none) event Deposit( address indexed user, uint256 indexed amount, address indexed referrer ); /// @notice Emitted when MAXX is claimed from a deposit /// @param user The user claiming MAXX /// @param day The day of the amplifier claimed /// @param amount The amount of MAXX claimed event Claim( address indexed user, uint256 indexed day, uint256 indexed amount ); /// @notice Emitted when MAXX is claimed from a referral /// @param user The user claiming MAXX /// @param amount The amount of MAXX claimed event ClaimReferral(address indexed user, uint256 amount); /// @notice Emitted when a deposit is made with a referral event Referral( address indexed user, address indexed referrer, uint256 amount ); /// @notice Emitted when the Maxx Stake contract address is set event StakeAddressSet(address indexed stake); /// @notice Emitted when the Maxx Genesis NFT contract address is set event MaxxGenesisSet(address indexed maxxGenesis); /// @notice Emitted when the launch date is updated event LaunchDateUpdated(uint256 newLaunchDate); /// @notice Emitted when a Maxx Genesis NFT is minted event MaxxGenesisMinted(address indexed user, string code); /// @notice Liquidity amplifier start date function launchDate() external view returns (uint256); /// @notice This function will return all liquidity amplifier participants /// @return participants Array of addresses that have participated in the Liquidity Amplifier function getParticipants() external view returns (address[] memory); /// @notice This function will return all liquidity amplifier participants for `day` day /// @param day The day for which to return the participants /// @return participants Array of addresses that have participated in the Liquidity Amplifier function getParticipantsByDay(uint256 day) external view returns (address[] memory); /// @notice This function will return a slice of the participants array /// @dev This function is used to paginate the participants array /// @param start The starting index of the slice /// @param length The amount of participants to return /// @return participantsSlice Array slice of addresses that have participated in the Liquidity Amplifier /// @return newStart The new starting index for the next slice function getParticipantsSlice(uint256 start, uint256 length) external view returns (address[] memory participantsSlice, uint256 newStart); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/access/IAccessControl.sol"; /// @title The interface for the Maxx Finance token contract interface IMaxxFinance is IERC20, IAccessControl { /// @notice Increases the token balance of `to` by `amount` /// @param to The address to mint to /// @param amount The amount to mint /// Emits a {Transfer} event. function mint(address to, uint256 amount) external; /// @dev Decreases the token balance of `msg.sender` by `amount` /// @param amount The amount to burn /// Emits a {Transfer} event with `to` set to the zero address. function burn(uint256 amount) external; /// @dev Decreases the token balance of `from` by `amount` /// @param from The address to burn from /// @param amount The amount to burn /// Emits a {Transfer} event with `to` set to the zero address. function burnFrom(address from, uint256 amount) external; // solhint-disable-next-line func-name-mixedcase function MINTER_ROLE() external view returns (bytes32); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; /// @title The interface for the Maxx Finance MAXXBoost NFT contract interface IMAXXBoost is IERC721 { function setUsed(uint256 _tokenId) external; function getUsedState(uint256 _tokenId) external view returns (bool); function mint(string memory _code, address _user) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @title The interface for the Maxx Finance Free Claim interface IFreeClaim { /// User has already claimed their allotment of MAXX error AlreadyClaimed(); /// Merkle proof is invalid error InvalidProof(); /// Maxx cannot be the zero address error InvalidMaxxAddress(); /// Merkle root cannot be zero error InvalidMerkleRoot(); /// No more MAXX left to claim error FreeClaimEnded(); /// Free Claim has not started yet error FreeClaimNotStarted(); /// Free Claim has not ended yet error FreeClaimNotEnded(); /// MAXX withdrawal failed error MaxxWithdrawFailed(); /// User cannot refer themselves error SelfReferral(); /// The Maxx Finance Staking contract hasn't been initialized error StakingNotInitialized(); /// Only the Staking contract can call this function error OnlyMaxxStake(); /// MAXX tokens not transferred to this contract error MaxxAllocationFailed(); /// Launch date must be in the future error LaunchDateUpdateFailed(); /// @notice Emitted when free claim is claimed /// @param user The user claiming free claim /// @param amount The amount of free claim claimed event UserClaim(address indexed user, uint256 amount); /// @notice Emitted when a referral is made /// @param referrer The address of the referrer /// @param user The user claiming free claim /// @param amount The amount of free claim claimed event Referral( address indexed referrer, address indexed user, uint256 amount ); /// @notice Emitted when the maxx token address is set /// @param maxx The address of the maxx token event MaxxSet(address indexed maxx); /// @notice Emitted when the merkle root is set /// @param merkleRoot The merkle root event MerkleRootSet(bytes32 indexed merkleRoot); /// @notice Emitted when the launch date is updated /// @param launchDate The new launch date event LaunchDateUpdated(uint256 indexed launchDate); function stakeClaim(uint256 unstakedClaimId, uint256 claimId) external; function getAllUnstakedClaims() external view returns (uint256[] memory); function getUnstakedClaimsSlice(uint256 start, uint256 end) external view returns (uint256[] memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; /// @title The interface for the Maxx Finance staking contract interface IStake is IERC721 { /// Not authorized to control the stake error NotAuthorized(); /// Cannot stake less than {MIN_STAKE_DAYS} days error StakeTooShort(); /// Cannot stake more than {MAX_STAKE_DAYS} days error StakeTooLong(); /// Cannot stake less than 50_000 MAXX error InvalidAmount(); /// Address does not own enough MAXX tokens error InsufficientMaxx(); /// Stake has not yet completed error StakeNotComplete(); /// Stake has already been claimed error StakeAlreadyWithdrawn(); /// User does not own the NFT error IncorrectOwner(); /// NFT boost has already been used error UsedNFT(); /// NFT collection is not accepted error NftNotAccepted(); /// Token transfer returned false (failed) error TransferFailed(); /// Tokens already staked for maximum duration error AlreadyMaxDuration(); /// Unstaked Free Claims have already been migrated error FreeClaimsAlreadyMigrated(); /// Current or proposed launch date has already passed error LaunchDatePassed(); /// Input cannot be the zero address; error ZeroAddress(); /// The contract is already initialized error AlreadyInitialized(); /// `_nft` does not support the IERC721 interface /// @param _nft the address of the NFT contract error InterfaceNotSupported(address _nft); /// @notice Emitted when MAXX is staked /// @param stakeId The ID of the stake /// @param user The user staking MAXX /// @param numDays The number of days staked /// @param amount The amount of MAXX staked event Stake( uint256 indexed stakeId, address indexed user, uint256 numDays, uint256 amount ); /// @notice Emitted when MAXX is unstaked /// @param user The user unstaking MAXX /// @param amount The amount of MAXX unstaked event Unstake( uint256 indexed stakeId, address indexed user, uint256 amount ); /// @notice Emitted when the name of a stake is changed /// @param stakeId The id of the stake /// @param name The new name of the stake event StakeNameChange(uint256 stakeId, string name); /// @notice Emitted when the launch date is updated event LaunchDateUpdated(uint256 newLaunchDate); /// @notice Emitted when the liquidityAmplifier address is updated event LiquidityAmplifierSet(address liquidityAmplifier); /// @notice Emitted when the freeClaim address is updated event FreeClaimSet(address freeClaim); event NftBonusSet(address nft, uint256 bonus); event BaseURISet(string baseUri); event AcceptedNftAdded(address nft); event AcceptedNftRemoved(address nft); struct StakeData { string name; address owner; uint256 amount; uint256 shares; uint256 duration; uint256 startDate; bool withdrawn; } enum MaxxNFT { MaxxGenesis, MaxxBoost } function stakes(uint256) external view returns ( string memory, address, uint256, uint256, uint256, uint256, bool ); function launchDate() external view returns (uint256); function freeClaimStake( address owner, uint256 numDays, uint256 amount ) external returns (uint256 stakeId, uint256 shares); function amplifierStake( address owner, uint256 numDays, uint256 amount ) external returns (uint256 stakeId, uint256 shares); }
// 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 v4.7.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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Contract Creation Code
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