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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {utils} from "./utils/utils.sol";
import {ERC721} from "solmate/tokens/ERC721.sol";
import {ERC20UDS} from "UDS/tokens/ERC20UDS.sol";
import {OwnableUDS} from "UDS/auth/OwnableUDS.sol";
import {UUPSUpgrade} from "UDS/proxy/UUPSUpgrade.sol";
import {ERC20RewardUDS} from "UDS/tokens/ERC20RewardUDS.sol";

// ------------- storage

bytes32 constant DIAMOND_STORAGE_CRFTD_TOKEN = keccak256("diamond.storage.crftd.token");

function s() pure returns (CRFTDTokenDS storage diamondStorage) {
    bytes32 slot = DIAMOND_STORAGE_CRFTD_TOKEN;
    assembly { diamondStorage.slot := slot } // prettier-ignore
}

struct CRFTDTokenDS {
    uint256 rewardEndDate;
    mapping(address => uint256) rewardRate;
    mapping(address => mapping(uint256 => address)) ownerOf;
}

// ------------- errors

error ZeroReward();
error IncorrectOwner();
error CollectionNotRegistered();
error CollectionAlreadyRegistered();

//       ___           ___           ___                    _____
//      /  /\         /  /\         /  /\       ___        /  /::\
//     /  /:/        /  /::\       /  /:/_     /__/\      /  /:/\:\
//    /  /:/        /  /:/\:\     /  /:/ /\    \  \:\    /  /:/  \:\
//   /  /:/  ___   /  /::\ \:\   /  /:/ /:/     \__\:\  /__/:/ \__\:|
//  /__/:/  /  /\ /__/:/\:\_\:\ /__/:/ /:/      /  /::\ \  \:\ /  /:/
//  \  \:\ /  /:/ \__\/~|::\/:/ \  \:\/:/      /  /:/\:\ \  \:\  /:/
//   \  \:\  /:/     |  |:|::/   \  \::/      /  /:/__\/  \  \:\/:/
//    \  \:\/:/      |  |:|\/     \  \:\     /__/:/        \  \::/
//     \  \::/       |__|:|        \  \:\    \__\/          \__\/
//      \__\/         \__\|         \__\/

/// @title CRFTDStakingToken
/// @author phaze (https://github.com/0xPhaze)
/// @notice Minimal ERC721 staking contract supporting multiple collections
/// @notice Combines ERC20 Token to avoid external calls
contract CRFTDStakingToken is ERC20RewardUDS, UUPSUpgrade, OwnableUDS {
    event CollectionRegistered(address indexed collection, uint256 rewardRate);

    /* ------------- init ------------- */

    function init(string calldata name, string calldata symbol) external initializer {
        __Ownable_init();
        __ERC20_init(name, symbol, 18);
    }

    /* ------------- public ------------- */

    function rewardEndDate() public view override returns (uint256) {
        return s().rewardEndDate;
    }

    function rewardDailyRate() public pure override returns (uint256) {
        return 1e16; // 0.01
    }

    function rewardRate(address collection) public view returns (uint256) {
        return s().rewardRate[collection];
    }

    function ownerOf(address collection, uint256 id) public view returns (address) {
        return s().ownerOf[collection][id];
    }

    function getDailyReward(address user) public view returns (uint256) {
        return _getRewardMultiplier(user) * rewardDailyRate();
    }

    /* ------------- erc20 ------------- */

    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        _claimReward(msg.sender);

        return ERC20UDS.transfer(to, amount);
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        _claimReward(from);

        return ERC20UDS.transferFrom(from, to, amount);
    }

    /* ------------- external ------------- */

    function stake(address collection, uint256[] calldata tokenIds) external {
        uint256 rate = s().rewardRate[collection];

        if (rate == 0) revert CollectionNotRegistered();

        _increaseRewardMultiplier(msg.sender, uint216(tokenIds.length * rate));

        for (uint256 i; i < tokenIds.length; ++i) {
            ERC721(collection).transferFrom(msg.sender, address(this), tokenIds[i]);

            s().ownerOf[collection][tokenIds[i]] = msg.sender;
        }
    }

    function unstake(address collection, uint256[] calldata tokenIds) external {
        uint256 rate = s().rewardRate[collection];

        if (rate == 0) revert CollectionNotRegistered();

        _decreaseRewardMultiplier(msg.sender, uint216(tokenIds.length * rate));

        for (uint256 i; i < tokenIds.length; ++i) {
            if (s().ownerOf[collection][tokenIds[i]] != msg.sender) revert IncorrectOwner();

            delete s().ownerOf[collection][tokenIds[i]];

            ERC721(collection).transferFrom(address(this), msg.sender, tokenIds[i]);
        }
    }

    function claimReward() external {
        _claimReward(msg.sender);
    }

    /* ------------- O(n) read-only ------------- */

    function stakedIdsOf(
        address collection,
        address user,
        uint256 collectionSize
    ) external view returns (uint256[] memory stakedIds) {
        return utils.getOwnedIds(s().ownerOf[collection], user, collectionSize);
    }

    /* ------------- owner ------------- */

    function registerCollection(address collection, uint200 rate) external onlyOwner {
        if (rate == 0) revert ZeroReward();
        if (s().rewardRate[collection] != 0) revert CollectionAlreadyRegistered();

        s().rewardRate[collection] = rate;

        emit CollectionRegistered(collection, rate);
    }

    function setRewardEndDate(uint256 endDate) external onlyOwner {
        s().rewardEndDate = endDate;
    }

    function airdrop(address[] calldata tos, uint256[] calldata amounts) external onlyOwner {
        for (uint256 i; i < tos.length; ++i) _mint(tos[i], amounts[i]);
    }

    /* ------------- UUPSUpgrade ------------- */

    function _authorizeUpgrade() internal override onlyOwner {}
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

library utils {
    function getOwnedIds(
        mapping(uint256 => address) storage ownerOf,
        address user,
        uint256 collectionSize
    ) internal view returns (uint256[] memory ids) {
        uint256 memPtr;
        uint256 idsLength;

        assembly {
            ids := mload(0x40)
            memPtr := add(ids, 32)
        }

        unchecked {
            uint256 end = collectionSize + 1;
            for (uint256 id = 0; id < end; ++id) {
                if (ownerOf[id] == user) {
                    assembly {
                        mstore(memPtr, id)
                        memPtr := add(memPtr, 32)
                        idsLength := add(idsLength, 1)
                    }
                }
            }
        }

        assembly {
            mstore(ids, idsLength)
            mstore(0x40, memPtr)
        }
    }

    function indexOf(address[] calldata arr, address addr) internal pure returns (bool found, uint256 index) {
        unchecked {
            for (uint256 i; i < arr.length; ++i) if (arr[i] == addr) return (true, i);
        }
        return (false, 0);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

/// @notice Modern, minimalist, and gas efficient ERC-721 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract ERC721 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 indexed id);

    event Approval(address indexed owner, address indexed spender, uint256 indexed id);

    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /*//////////////////////////////////////////////////////////////
                         METADATA STORAGE/LOGIC
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    function tokenURI(uint256 id) public view virtual returns (string memory);

    /*//////////////////////////////////////////////////////////////
                      ERC721 BALANCE/OWNER STORAGE
    //////////////////////////////////////////////////////////////*/

    mapping(uint256 => address) internal _ownerOf;

    mapping(address => uint256) internal _balanceOf;

    function ownerOf(uint256 id) public view virtual returns (address owner) {
        require((owner = _ownerOf[id]) != address(0), "NOT_MINTED");
    }

    function balanceOf(address owner) public view virtual returns (uint256) {
        require(owner != address(0), "ZERO_ADDRESS");

        return _balanceOf[owner];
    }

    /*//////////////////////////////////////////////////////////////
                         ERC721 APPROVAL STORAGE
    //////////////////////////////////////////////////////////////*/

    mapping(uint256 => address) public getApproved;

    mapping(address => mapping(address => bool)) public isApprovedForAll;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(string memory _name, string memory _symbol) {
        name = _name;
        symbol = _symbol;
    }

    /*//////////////////////////////////////////////////////////////
                              ERC721 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 id) public virtual {
        address owner = _ownerOf[id];

        require(msg.sender == owner || isApprovedForAll[owner][msg.sender], "NOT_AUTHORIZED");

        getApproved[id] = spender;

        emit Approval(owner, spender, id);
    }

    function setApprovalForAll(address operator, bool approved) public virtual {
        isApprovedForAll[msg.sender][operator] = approved;

        emit ApprovalForAll(msg.sender, operator, approved);
    }

    function transferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        require(from == _ownerOf[id], "WRONG_FROM");

        require(to != address(0), "INVALID_RECIPIENT");

        require(
            msg.sender == from || isApprovedForAll[from][msg.sender] || msg.sender == getApproved[id],
            "NOT_AUTHORIZED"
        );

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        unchecked {
            _balanceOf[from]--;

            _balanceOf[to]++;
        }

        _ownerOf[id] = to;

        delete getApproved[id];

        emit Transfer(from, to, id);
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        transferFrom(from, to, id);

        if (to.code.length != 0)
            require(
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
                    ERC721TokenReceiver.onERC721Received.selector,
                "UNSAFE_RECIPIENT"
            );
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        bytes calldata data
    ) public virtual {
        transferFrom(from, to, id);

        if (to.code.length != 0)
            require(
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
                    ERC721TokenReceiver.onERC721Received.selector,
                "UNSAFE_RECIPIENT"
            );
    }

    /*//////////////////////////////////////////////////////////////
                              ERC165 LOGIC
    //////////////////////////////////////////////////////////////*/

    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
            interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 id) internal virtual {
        require(to != address(0), "INVALID_RECIPIENT");

        require(_ownerOf[id] == address(0), "ALREADY_MINTED");

        // Counter overflow is incredibly unrealistic.
        unchecked {
            _balanceOf[to]++;
        }

        _ownerOf[id] = to;

        emit Transfer(address(0), to, id);
    }

    function _burn(uint256 id) internal virtual {
        address owner = _ownerOf[id];

        require(owner != address(0), "NOT_MINTED");

        // Ownership check above ensures no underflow.
        unchecked {
            _balanceOf[owner]--;
        }

        delete _ownerOf[id];

        delete getApproved[id];

        emit Transfer(owner, address(0), id);
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL SAFE MINT LOGIC
    //////////////////////////////////////////////////////////////*/

    function _safeMint(address to, uint256 id) internal virtual {
        _mint(to, id);

        if (to.code.length != 0)
            require(
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, "") ==
                    ERC721TokenReceiver.onERC721Received.selector,
                "UNSAFE_RECIPIENT"
            );
    }

    function _safeMint(
        address to,
        uint256 id,
        bytes memory data
    ) internal virtual {
        _mint(to, id);

        if (to.code.length != 0)
            require(
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, data) ==
                    ERC721TokenReceiver.onERC721Received.selector,
                "UNSAFE_RECIPIENT"
            );
    }
}

/// @notice A generic interface for a contract which properly accepts ERC721 tokens.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract ERC721TokenReceiver {
    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) external virtual returns (bytes4) {
        return ERC721TokenReceiver.onERC721Received.selector;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {Initializable} from "../auth/Initializable.sol";
import {EIP712PermitUDS} from "../auth/EIP712PermitUDS.sol";

// ------------- storage

bytes32 constant DIAMOND_STORAGE_ERC20 = keccak256("diamond.storage.erc20");

function s() pure returns (ERC20DS storage diamondStorage) {
    bytes32 slot = DIAMOND_STORAGE_ERC20;
    assembly { diamondStorage.slot := slot } // prettier-ignore
}

struct ERC20DS {
    string name;
    string symbol;
    uint8 decimals;
    uint256 totalSupply;
    mapping(address => uint256) balanceOf;
    mapping(address => mapping(address => uint256)) allowance;
}

/// @title ERC20 (Upgradeable Diamond Storage)
/// @author phaze (https://github.com/0xPhaze/UDS)
/// @author Modified from Solmate (https://github.com/Rari-Capital/solmate)
abstract contract ERC20UDS is Initializable, EIP712PermitUDS {
    event Transfer(address indexed from, address indexed to, uint256 amount);
    event Approval(address indexed owner, address indexed operator, uint256 amount);

    /* ------------- init ------------- */

    function __ERC20_init(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) internal initializer {
        s().name = _name;
        s().symbol = _symbol;
        s().decimals = _decimals;
    }

    /* ------------- view ------------- */

    function name() external view virtual returns (string memory) {
        return s().name;
    }

    function symbol() external view virtual returns (string memory) {
        return s().symbol;
    }

    function decimals() external view virtual returns (uint8) {
        return s().decimals;
    }

    function totalSupply() external view virtual returns (uint256) {
        return s().totalSupply;
    }

    function balanceOf(address owner) public view virtual returns (uint256) {
        return s().balanceOf[owner];
    }

    function allowance(address owner, address operator) public view virtual returns (uint256) {
        return s().allowance[owner][operator];
    }

    /* ------------- public ------------- */

    function approve(address operator, uint256 amount) public virtual returns (bool) {
        s().allowance[msg.sender][operator] = amount;

        emit Approval(msg.sender, operator, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        s().balanceOf[msg.sender] -= amount;

        unchecked {
            s().balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = s().allowance[from][msg.sender];

        if (allowed != type(uint256).max) s().allowance[from][msg.sender] = allowed - amount;

        s().balanceOf[from] -= amount;

        unchecked {
            s().balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    // EIP-2612 permit
    function permit(
        address owner,
        address operator,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s_
    ) public virtual {
        if (_usePermit(owner, operator, value, deadline, v, r, s_)) {
            s().allowance[owner][operator] = value;

            emit Approval(owner, operator, value);
        }
    }

    /* ------------- internal ------------- */

    function _mint(address to, uint256 amount) internal virtual {
        s().totalSupply += amount;

        unchecked {
            s().balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        s().balanceOf[from] -= amount;

        unchecked {
            s().totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {Initializable} from "./Initializable.sol";

// ------------- storage

bytes32 constant DIAMOND_STORAGE_OWNABLE = keccak256("diamond.storage.ownable");

function s() pure returns (OwnableDS storage diamondStorage) {
    bytes32 slot = DIAMOND_STORAGE_OWNABLE;
    assembly { diamondStorage.slot := slot } // prettier-ignore
}

struct OwnableDS {
    address owner;
}

// ------------- errors

error CallerNotOwner();

/// @title Ownable (Upgradeable Diamond Storage)
/// @author phaze (https://github.com/0xPhaze/UDS)
/// @dev Requires `__Ownable_init` to be called in proxy
abstract contract OwnableUDS is Initializable {
    event OwnerChanged(address oldOwner, address newOwner);

    function __Ownable_init() internal initializer {
        s().owner = msg.sender;
    }

    /* ------------- external ------------- */

    function owner() public view returns (address) {
        return s().owner;
    }

    function transferOwnership(address newOwner) external onlyOwner {
        s().owner = newOwner;

        emit OwnerChanged(msg.sender, newOwner);
    }

    /* ------------- modifier ------------- */

    modifier onlyOwner() {
        if (msg.sender != s().owner) revert CallerNotOwner();
        _;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {ERC1967, ERC1967_PROXY_STORAGE_SLOT} from "./ERC1967Proxy.sol";

// ------------- errors

error OnlyProxyCallAllowed();
error DelegateCallNotAllowed();

/// @notice Minimal UUPSUpgrade
/// @author phaze (https://github.com/0xPhaze/UDS)
abstract contract UUPSUpgrade is ERC1967 {
    address private immutable __implementation = address(this);

    /* ------------- external ------------- */

    function upgradeToAndCall(address logic, bytes calldata data) external {
        _authorizeUpgrade();
        _upgradeToAndCall(logic, data);
    }

    /* ------------- view ------------- */

    function proxiableUUID() external view virtual notDelegated returns (bytes32) {
        return ERC1967_PROXY_STORAGE_SLOT;
    }

    /* ------------- virtual ------------- */

    function _authorizeUpgrade() internal virtual;

    /* ------------- modifier ------------- */

    modifier onlyProxy() {
        if (address(this) == __implementation) revert OnlyProxyCallAllowed();
        _;
    }

    modifier notDelegated() {
        if (address(this) != __implementation) revert DelegateCallNotAllowed();
        _;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {ERC20UDS, s as erc20ds} from "./ERC20UDS.sol";

// ------------- storage

bytes32 constant DIAMOND_STORAGE_ERC20_REWARD = keccak256("diamond.storage.erc20.reward");

function s() pure returns (ERC20RewardDS storage diamondStorage) {
    bytes32 slot = DIAMOND_STORAGE_ERC20_REWARD;
    assembly { diamondStorage.slot := slot } // prettier-ignore
}

struct UserData {
    uint216 multiplier;
    uint40 lastClaimed;
}

struct ERC20RewardDS {
    mapping(address => UserData) userData;
}

/// @title ERC20Reward (Upgradeable Diamond Storage)
/// @author phaze (https://github.com/0xPhaze/UDS)
/// @notice Allows for ERC20 reward accrual
/// @notice at a rate of rewardDailyRate() * multiplier[user] per day
/// @notice Tokens are automatically claimed before any multiplier update
abstract contract ERC20RewardUDS is ERC20UDS {
    /* ------------- virtual ------------- */

    function rewardEndDate() public view virtual returns (uint256);

    function rewardDailyRate() public view virtual returns (uint256);

    /* ------------- view ------------- */

    function totalBalanceOf(address owner) public view virtual returns (uint256) {
        return ERC20UDS.balanceOf(owner) + pendingReward(owner);
    }

    function pendingReward(address owner) public view virtual returns (uint256) {
        UserData storage userData = s().userData[owner];

        return _calculateReward(userData.multiplier, userData.lastClaimed);
    }

    /* ------------- internal ------------- */

    function _getRewardMultiplier(address owner) internal view virtual returns (uint256) {
        return s().userData[owner].multiplier;
    }

    function _calculateReward(uint256 multiplier, uint256 lastClaimed) internal view virtual returns (uint256) {
        uint256 end = rewardEndDate();

        uint256 timestamp = block.timestamp;

        if (lastClaimed > end) return 0;
        else if (timestamp > end) timestamp = end;

        // if multiplier > 0 then lastClaimed > 0
        // because _claimReward must have been called
        return ((timestamp - lastClaimed) * multiplier * rewardDailyRate()) / 1 days;
    }

    function _claimReward(address owner) internal virtual {
        UserData storage userData = s().userData[owner];

        uint256 multiplier = userData.multiplier;
        uint256 lastClaimed = userData.lastClaimed;

        if (multiplier != 0 || lastClaimed == 0) {
            // only forego minting if multiplier == 0
            // checking for amount == 0 can lead to failed transactions
            // due to too little gas being supplied through estimation
            if (multiplier != 0) {
                uint256 amount = _calculateReward(multiplier, lastClaimed);

                _mint(owner, amount);
            }

            s().userData[owner].lastClaimed = uint40(block.timestamp);
        }
    }

    function _increaseRewardMultiplier(address owner, uint216 quantity) internal virtual {
        _claimReward(owner);

        s().userData[owner].multiplier += quantity;
    }

    function _decreaseRewardMultiplier(address owner, uint216 quantity) internal virtual {
        _claimReward(owner);

        s().userData[owner].multiplier -= quantity;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {s as erc1967ds} from "../proxy/ERC1967Proxy.sol";

// ------------- errors

error ProxyCallRequired();
error AlreadyInitialized();

/// @title Initializable
/// @author phaze (https://github.com/0xPhaze/UDS)
/// @dev functions using the `initializer` modifier are only callable during proxy deployment
/// @dev functions using the `reinitializer` modifier are only callable through a proxy
/// @dev and only before a proxy upgrade migration has completed
/// @dev (only when `upgradeToAndCall`'s `initCalldata` is being executed)
/// @dev allows re-initialization during upgrades
abstract contract Initializable {
    address private immutable __implementation = address(this);

    /* ------------- modifier ------------- */

    modifier initializer() {
        if (address(this).code.length != 0) revert AlreadyInitialized();
        _;
    }

    modifier reinitializer() {
        if (address(this) == __implementation) revert ProxyCallRequired();
        if (erc1967ds().implementation == __implementation) revert AlreadyInitialized();
        _;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// ------------- storage

bytes32 constant DIAMOND_STORAGE_EIP_712_PERMIT = keccak256("diamond.storage.eip.712.permit");

function s() pure returns (EIP2612DS storage diamondStorage) {
    bytes32 slot = DIAMOND_STORAGE_EIP_712_PERMIT;
    assembly { diamondStorage.slot := slot } // prettier-ignore
}

struct EIP2612DS {
    mapping(address => uint256) nonces;
}

// ------------- errors

error InvalidSigner();
error DeadlineExpired();

/// @title EIP712Permit (Upgradeable Diamond Storage)
/// @author phaze (https://github.com/0xPhaze/UDS)
/// @author Modified from Solmate (https://github.com/Rari-Capital/solmate)
/// @dev `DOMAIN_SEPARATOR` needs to be re-computed every time
/// @dev for use with a proxy due to `address(this)`
abstract contract EIP712PermitUDS {
    /* ------------- public ------------- */

    function nonces(address owner) public view returns (uint256) {
        return s().nonces[owner];
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256("EIP712"),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /* ------------- internal ------------- */

    function _usePermit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v_,
        bytes32 r_,
        bytes32 s_
    ) internal virtual returns (bool) {
        if (deadline < block.timestamp) revert DeadlineExpired();

        unchecked {
            uint256 nonce = s().nonces[owner]++;

            address recovered = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonce,
                                deadline
                            )
                        )
                    )
                ),
                v_,
                r_,
                s_
            );

            if (recovered == address(0) || recovered != owner) revert InvalidSigner();
        }

        return true;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// ------------- storage

// keccak256("eip1967.proxy.implementation") - 1 = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
bytes32 constant ERC1967_PROXY_STORAGE_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

function s() pure returns (ERC1967UpgradeDS storage diamondStorage) {
    assembly { diamondStorage.slot := ERC1967_PROXY_STORAGE_SLOT } // prettier-ignore
}

struct ERC1967UpgradeDS {
    address implementation;
}

// ------------- errors

error InvalidUUID();
error NotAContract();

/// @notice ERC1967
/// @author phaze (https://github.com/0xPhaze/UDS)
abstract contract ERC1967 {
    event Upgraded(address indexed implementation);

    function _upgradeToAndCall(address logic, bytes memory data) internal {
        if (logic.code.length == 0) revert NotAContract();

        if (ERC1822(logic).proxiableUUID() != ERC1967_PROXY_STORAGE_SLOT) revert InvalidUUID();

        if (data.length != 0) {
            (bool success, ) = logic.delegatecall(data);

            if (!success) {
                assembly {
                    returndatacopy(0, 0, returndatasize())
                    revert(0, returndatasize())
                }
            }
        }

        emit Upgraded(logic);

        s().implementation = logic;
    }
}

/// @notice Minimal ERC1967Proxy
/// @author phaze (https://github.com/0xPhaze/UDS)
contract ERC1967Proxy is ERC1967 {
    constructor(address logic, bytes memory data) payable {
        _upgradeToAndCall(logic, data);
    }

    fallback() external payable {
        assembly {
            calldatacopy(0, 0, calldatasize())

            let success := delegatecall(gas(), sload(ERC1967_PROXY_STORAGE_SLOT), 0, calldatasize(), 0, 0)

            returndatacopy(0, 0, returndatasize())

            if success {
                return(0, returndatasize())
            }

            revert(0, returndatasize())
        }
    }
}

/// @notice ERC1822
/// @author phaze (https://github.com/0xPhaze/UDS)
abstract contract ERC1822 {
    function proxiableUUID() external view virtual returns (bytes32);
}

{
  "remappings": [
    "ArrayUtils/=lib/ArrayUtils/src/",
    "CRFTD/=src/",
    "UDS/=lib/UDS/src/",
    "ds-test/=lib/solmate/lib/ds-test/src/",
    "f-utils/=lib/f-utils/src/",
    "forge-std/=lib/forge-std/src/",
    "script/=script/",
    "solmate/=lib/solmate/src/",
    "src/=src/",
    "test/=test/",
    "src/=src/",
    "test/=test/",
    "script/=script/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 100000
  },
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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ternalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint200","name":"rate","type":"uint200"}],"name":"registerCollection","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rewardDailyRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"rewardEndDate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"collection","type":"address"}],"name":"rewardRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"endDate","type":"uint256"}],"name":"setRewardEndDate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"collectionSize","type":"uint256"}],"name":"stakedIdsOf","outputs":[{"internalType":"uint256[]","name":"stakedIds","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"totalBalanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"collection","type":"address"},{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"name":"unstake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"logic","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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