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// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

import { Cast } from "./libraries/Cast.sol";

import { ERC6909X } from "./tokens/ERC6909X.sol";
import { IERC20Metadata as IERC20 } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { ShortString, ShortStrings } from "@openzeppelin/contracts/utils/ShortStrings.sol";

/**
 * @title Splits Token Warehouse
 * @author Splits
 * @notice ERC6909 compliant token warehouse for Splits ecosystem
 * @dev Token id here is address(uint160(uint256 id)).
 */
contract SplitsWarehouse is ERC6909X {
    using Cast for uint256;
    using Cast for address;
    using SafeERC20 for IERC20;
    using Address for address payable;
    using ShortStrings for string;
    using ShortStrings for ShortString;

    /* -------------------------------------------------------------------------- */
    /*                                   ERRORS                                   */
    /* -------------------------------------------------------------------------- */

    error InvalidAmount();
    error LengthMismatch();
    error ZeroOwner();
    error WithdrawalPaused(address owner);

    /* -------------------------------------------------------------------------- */
    /*                                   EVENTS                                   */
    /* -------------------------------------------------------------------------- */

    event WithdrawConfigUpdated(address indexed owner, WithdrawConfig config);
    event Withdraw(
        address indexed owner, address indexed token, address indexed withdrawer, uint256 amount, uint256 reward
    );

    /* -------------------------------------------------------------------------- */
    /*                                   STRUCTS                                  */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Withdraw config for a user.
     * @param incentive The incentive for withdrawing tokens.
     * @param paused The paused state of the withdrawal.
     */
    struct WithdrawConfig {
        uint16 incentive;
        bool paused;
    }

    /* -------------------------------------------------------------------------- */
    /*                            CONSTANTS/IMMUTABLES                            */
    /* -------------------------------------------------------------------------- */

    /// @notice prefix for metadata name.
    string private constant METADATA_PREFIX_NAME = "Splits Wrapped ";

    /// @notice prefix for metadata symbol.
    string private constant METADATA_PREFIX_SYMBOL = "splits";

    /// @notice address of the native token, inline with ERC 7528.
    address public constant NATIVE_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /// @notice uint256 representation of the native token.
    uint256 public constant NATIVE_TOKEN_ID = uint256(uint160(NATIVE_TOKEN));

    /// @notice metadata name of the native token.
    ShortString private immutable NATIVE_TOKEN_NAME;

    /// @notice metadata symbol of the native token.
    ShortString private immutable NATIVE_TOKEN_SYMBOL;

    /// @notice Scale for any numbers representing percentages.
    /// @dev Used for the token withdrawing incentive.
    uint256 public constant PERCENTAGE_SCALE = 1e6;

    /* -------------------------------------------------------------------------- */
    /*                                   STORAGE                                  */
    /* -------------------------------------------------------------------------- */

    /// @notice Withdraw config of a user.
    mapping(address owner => WithdrawConfig config) public withdrawConfig;

    /* -------------------------------------------------------------------------- */
    /*                                 CONSTRUCTOR                                */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Constructs the SplitsWarehouse contract.
     * @param _native_token_name The name of the native token.
     * @param _native_token_symbol The symbol of the native token.
     */
    constructor(
        string memory _native_token_name,
        string memory _native_token_symbol
    )
        ERC6909X("SplitsWarehouse", "v1")
    {
        NATIVE_TOKEN_NAME = _native_token_name.toShortString();
        NATIVE_TOKEN_SYMBOL = _native_token_symbol.toShortString();
    }

    /* -------------------------------------------------------------------------- */
    /*                               ERC6909METADATA                              */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Name of a given token.
     * @param id The id of the token.
     * @return The name of the token.
     */
    function name(uint256 id) external view returns (string memory) {
        if (id == NATIVE_TOKEN_ID) {
            return NATIVE_TOKEN_NAME.toString();
        }
        return string.concat(METADATA_PREFIX_NAME, IERC20(id.toAddress()).name());
    }

    /**
     * @notice Symbol of a given token.
     * @param id The id of the token.
     * @return The symbol of the token.
     */
    function symbol(uint256 id) external view returns (string memory) {
        if (id == NATIVE_TOKEN_ID) {
            return NATIVE_TOKEN_SYMBOL.toString();
        }
        return string.concat(METADATA_PREFIX_SYMBOL, IERC20(id.toAddress()).symbol());
    }

    /**
     * @notice Decimals of a given token.
     * @param id The id of the token.
     * @return The decimals of the token.
     */
    function decimals(uint256 id) external view returns (uint8) {
        if (id == NATIVE_TOKEN_ID) {
            return 18;
        }
        return IERC20(id.toAddress()).decimals();
    }

    /* -------------------------------------------------------------------------- */
    /*                          PUBLIC/EXTERNAL FUNCTIONS                         */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Deposits token to the warehouse for a specified address.
     * @dev If the token is native, the amount should be sent as value.
     * @param _receiver The address that will receive the wrapped tokens.
     * @param _token The address of the token to be deposited.
     * @param _amount The amount of the token to be deposited.
     */
    function deposit(address _receiver, address _token, uint256 _amount) external payable {
        if (_token == NATIVE_TOKEN) {
            if (_amount != msg.value) revert InvalidAmount();
        } else {
            IERC20(_token).safeTransferFrom({ from: msg.sender, to: address(this), value: _amount });
        }

        _mint({ _receiver: _receiver, _id: _token.toUint256(), _amount: _amount });
    }

    /**
     * @notice Batch deposits token to the warehouse for the specified addresses from msg.sender.
     * @dev If the token is native, the amount should be sent as value.
     * @param _token The address of the token to be deposited.
     * @param _receivers The addresses that will receive the wrapped tokens.
     * @param _amounts The amounts of the token to be deposited.
     */
    function batchDeposit(
        address[] calldata _receivers,
        address _token,
        uint256[] calldata _amounts
    )
        external
        payable
    {
        if (_receivers.length != _amounts.length) revert LengthMismatch();

        uint256 sum;
        uint256 amount;
        uint256 tokenId = _token.toUint256();
        uint256 length = _receivers.length;

        for (uint256 i; i < length; ++i) {
            amount = _amounts[i];
            sum += amount;
            _mint({ _receiver: _receivers[i], _id: tokenId, _amount: amount });
        }

        if (_token == NATIVE_TOKEN) {
            if (sum != msg.value) revert InvalidAmount();
        } else {
            IERC20(_token).safeTransferFrom({ from: msg.sender, to: address(this), value: sum });
        }
    }

    /**
     * @notice Withdraws token from the warehouse for _owner.
     * @dev Bypasses withdrawal incentives.
     * @param _owner The address whose tokens are withdrawn.
     * @param _token The address of the token to be withdrawn.
     */
    function withdraw(address _owner, address _token) external {
        if (msg.sender != _owner && tx.origin != _owner) {
            if (withdrawConfig[_owner].paused) {
                revert WithdrawalPaused(_owner);
            }
        }

        // leave 1 to save gas.
        uint256 amount = balanceOf[_owner][_token.toUint256()] - 1;

        _withdraw({ _owner: _owner, _token: _token, _amount: amount, _withdrawer: msg.sender, _reward: 0 });
    }

    /**
     * @notice Withdraws tokens from the warehouse for a specified address.
     * @dev It is recommended to withdraw balance - 1 to save gas.
     * @param _owner The address whose tokens are withdrawn.
     * @param _tokens The addresses of the tokens to be withdrawn.
     * @param _amounts The amounts of the tokens to be withdrawn.
     * @param _withdrawer The address that will receive the withdrawer incentive.
     */
    function withdraw(
        address _owner,
        address[] calldata _tokens,
        uint256[] calldata _amounts,
        address _withdrawer
    )
        external
    {
        if (_tokens.length != _amounts.length) revert LengthMismatch();

        WithdrawConfig memory config = withdrawConfig[_owner];

        if (config.paused) revert WithdrawalPaused(_owner);

        uint256 reward;
        uint256 length = _tokens.length;

        for (uint256 i; i < length; ++i) {
            reward = _amounts[i] * config.incentive / PERCENTAGE_SCALE;

            _withdraw({
                _owner: _owner,
                _token: _tokens[i],
                _amount: _amounts[i],
                _withdrawer: _withdrawer,
                _reward: reward
            });
        }
    }

    /**
     * @notice Batch transfers tokens to the specified addresses from msg.sender.
     * @param _token The address of the token to be transferred.
     * @param _receivers The addresses of the receivers.
     * @param _amounts The amounts of the tokens to be transferred.
     */
    function batchTransfer(address[] calldata _receivers, address _token, uint256[] calldata _amounts) external {
        if (_receivers.length != _amounts.length) revert LengthMismatch();

        uint256 sum;
        uint256 amount;
        address receiver;

        uint256 tokenId = _token.toUint256();
        uint256 length = _receivers.length;

        for (uint256 i; i < length; ++i) {
            receiver = _receivers[i];
            amount = _amounts[i];

            balanceOf[receiver][tokenId] += amount;
            emit Transfer({ caller: msg.sender, sender: msg.sender, receiver: receiver, id: tokenId, amount: amount });

            sum += amount;
        }

        balanceOf[msg.sender][tokenId] -= sum;
    }

    /**
     * @notice Sets the withdraw config for the msg.sender.
     * @param _config Includes the incentives for withdrawal and their paused state.
     */
    function setWithdrawConfig(WithdrawConfig calldata _config) external {
        withdrawConfig[msg.sender] = _config;
        emit WithdrawConfigUpdated({ owner: msg.sender, config: _config });
    }

    /* -------------------------------------------------------------------------- */
    /*                              INTERNAL/PRIVATE                              */
    /* -------------------------------------------------------------------------- */

    function _withdraw(
        address _owner,
        address _token,
        uint256 _amount,
        address _withdrawer,
        uint256 _reward
    )
        internal
    {
        _burn({ _sender: _owner, _id: _token.toUint256(), _amount: _amount });

        uint256 amountToOwner = _amount - _reward;

        if (_token == NATIVE_TOKEN) {
            payable(_owner).sendValue(amountToOwner);

            if (_reward != 0) payable(_withdrawer).sendValue(_reward);
        } else {
            IERC20(_token).safeTransfer({ to: _owner, value: amountToOwner });

            if (_reward != 0) IERC20(_token).safeTransfer({ to: _withdrawer, value: _reward });
        }

        // solhint-disable-next-line
        emit Withdraw({ owner: _owner, token: _token, withdrawer: _withdrawer, amount: amountToOwner, reward: _reward });
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

library Cast {
    error Overflow();

    function toAddress(uint256 _value) internal pure returns (address) {
        return address(toUint160(_value));
    }

    function toUint256(address _value) internal pure returns (uint256) {
        return uint256(uint160(_value));
    }

    function toUint160(uint256 _x) internal pure returns (uint160 y) {
        if (_x >> 160 != 0) revert Overflow();
        // solhint-disable-next-line no-inline-assembly
        assembly {
            y := _x
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

import { IERC6909X } from "../interfaces/IERC6909X.sol";
import { IERC6909XCallback } from "../interfaces/IERC6909XCallback.sol";
import { UnorderedNonces } from "../utils/UnorderedNonces.sol";
import { ERC6909 } from "./ERC6909.sol";
import { EIP712 } from "@openzeppelin/contracts/utils/cryptography/EIP712.sol";
import { SignatureChecker } from "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol";

/**
 * @author forked from https://github.com/frangio/erc6909-extensions
 * @dev Implementation of the ERC-6909 Permit extension allowing approvals to spenders and operators to be made via
 * signatures.
 */
contract ERC6909X is ERC6909, EIP712, UnorderedNonces, IERC6909X {
    /* -------------------------------------------------------------------------- */
    /*                            CONSTANTS/IMMUTABLES                            */
    /* -------------------------------------------------------------------------- */

    /// @notice The EIP-712 typehash for approveAndCall
    bytes32 public constant APPROVE_AND_CALL_TYPE_HASH = keccak256(
        // solhint-disable-next-line max-line-length
        "ERC6909XApproveAndCall(bool temporary,address owner,address spender,bool operator,uint256 id,uint256 amount,address target,bytes data,uint256 nonce,uint48 deadline)"
    );

    /* -------------------------------------------------------------------------- */
    /*                                   ERRORS                                   */
    /* -------------------------------------------------------------------------- */

    error ExpiredSignature(uint48 deadline);
    error InvalidSigner();
    error InvalidPermitParams();
    error InvalidAck();

    /* -------------------------------------------------------------------------- */
    /*                                 CONSTRUCTOR                                */
    /* -------------------------------------------------------------------------- */

    /**
     * @dev Initializes the {EIP712} domain separator.
     *
     */
    constructor(string memory _name, string memory _version) EIP712(_name, _version) { }

    /* -------------------------------------------------------------------------- */
    /*                              PUBLIC FUNCTIONS                              */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Returns true if `interfaceId` is supported.
     * @dev Supports ERC6909X, ERC165, and ERC6909.
     * @param _interfaceId The interface identifier, as specified in ERC-165.
     */
    function supportsInterface(bytes4 _interfaceId) public view override returns (bool supported) {
        return super.supportsInterface({ _interfaceId: _interfaceId }) || _interfaceId == type(IERC6909X).interfaceId;
    }

    /**
     * @notice Temporary grants spender allowance or operator status and forwards the data to the target contract.
     * @dev The function will revert if the target contract does not return the expected ack.
     * @param _spender The address of the account that will be allowed to spend the tokens.
     * @param _operator True if the spender is to be set as an operator. if True, id and amount should be 0.
     * @param _id The ID of the token to be spent.
     * @param _amount The amount of the token to be spent.
     * @param _target The address of the contract to be called.
     * @param _data The data to be sent to the target contract.
     * @return True Returns true if the call is successful.
     */
    function temporaryApproveAndCall(
        address _spender,
        bool _operator,
        uint256 _id,
        uint256 _amount,
        address _target,
        bytes memory _data
    )
        external
        returns (bool)
    {
        _temporaryApproveAndCall({
            _owner: msg.sender,
            _spender: _spender,
            _operator: _operator,
            _id: _id,
            _amount: _amount,
            _target: _target,
            _data: _data
        });
        return true;
    }

    /**
     * @notice Temporary grants spender allowance or operator status and forwards the data to the target contract using
     * a signature.
     * @dev The function will revert if the signature is invalid or the target contract does not return the expected
     * ack.
     * @param _owner The address of the account that will be allowing the spender to spend the tokens.
     * @param _spender The address of the account that will be allowed to spend the tokens.
     * @param _operator True if the spender is to be set as an operator. if True, id and amount should be 0.
     * @param _id The ID of the token to be spent.
     * @param _amount The amount of the token to be spent.
     * @param _target The address of the contract to be called.
     * @param _data The data to be sent to the target contract.
     * @param _nonce Unused nonce.
     * @param _deadline The deadline timestamp for the signature.
     * @param _signature The signature to be validated.
     * @return True Returns true if the call is successful.
     */
    function temporaryApproveAndCallBySig(
        address _owner,
        address _spender,
        bool _operator,
        uint256 _id,
        uint256 _amount,
        address _target,
        bytes memory _data,
        uint256 _nonce,
        uint48 _deadline,
        bytes memory _signature
    )
        external
        returns (bool)
    {
        // if the nonce is invalid, the function will revert.
        useNonce({ _from: _owner, _nonce: _nonce });

        _validateApproveAndCallSignature({
            _temporary: true,
            _owner: _owner,
            _spender: _spender,
            _operator: _operator,
            _id: _id,
            _amount: _amount,
            _target: _target,
            _data: _data,
            _nonce: _nonce,
            _deadline: _deadline,
            _signature: _signature
        });

        _temporaryApproveAndCall({
            _owner: _owner,
            _spender: _spender,
            _operator: _operator,
            _id: _id,
            _amount: _amount,
            _target: _target,
            _data: _data
        });

        return true;
    }

    /**
     * @notice Grants spender allowance or operator status using a signature.
     * @dev The function will revert if the signature is invalid.
     * @param _owner The address of the account that will be allowing the spender to spend the tokens.
     * @param _spender The address of the account that will be allowed to spend the tokens.
     * @param _operator True if the spender is to be set as an operator. if True, id and amount should be 0.
     * @param _id The ID of the token to be spent.
     * @param _amount The amount of the token to be spent.
     * @param _nonce Unused nonce.
     * @param _deadline The deadline timestamp for the signature.
     * @param _signature The signature to be validated.
     * @return True returns true if the call is successful.
     */
    function approveBySig(
        address _owner,
        address _spender,
        bool _operator,
        uint256 _id,
        uint256 _amount,
        uint256 _nonce,
        uint48 _deadline,
        bytes memory _signature
    )
        external
        returns (bool)
    {
        // if the nonce is invalid, the function will revert.
        useNonce({ _from: _owner, _nonce: _nonce });

        _validateApproveAndCallSignature({
            _temporary: false,
            _owner: _owner,
            _spender: _spender,
            _operator: _operator,
            _id: _id,
            _amount: _amount,
            _target: address(0),
            _data: "",
            _nonce: _nonce,
            _deadline: _deadline,
            _signature: _signature
        });

        _setSpenderAccess({ _owner: _owner, _spender: _spender, _operator: _operator, _id: _id, _amount: _amount });

        return true;
    }

    /* -------------------------------------------------------------------------- */
    /*                             INTERNAL FUNCTIONS                             */
    /* -------------------------------------------------------------------------- */

    function _temporaryApproveAndCall(
        address _owner,
        address _spender,
        bool _operator,
        uint256 _id,
        uint256 _amount,
        address _target,
        bytes memory _data
    )
        internal
    {
        (bool prevIsOperator, uint256 prevAllowance) =
            _setSpenderAccess({ _owner: _owner, _spender: _spender, _operator: _operator, _id: _id, _amount: _amount });

        bytes4 ack = IERC6909XCallback(_target).onTemporaryApprove({
            owner: _owner,
            operator: _operator,
            id: _id,
            amount: _amount,
            data: _data
        });
        if (ack != IERC6909XCallback.onTemporaryApprove.selector) revert InvalidAck();

        if (_operator) {
            _setOperator({ _owner: _owner, _operator: _spender, _approved: prevIsOperator });
        } else {
            _approve({ _owner: _owner, _spender: _spender, _id: _id, _amount: prevAllowance });
        }
    }

    function _setSpenderAccess(
        address _owner,
        address _spender,
        bool _operator,
        uint256 _id,
        uint256 _amount
    )
        internal
        returns (bool prevIsOperator, uint256 prevAllowance)
    {
        if (_operator) {
            if (_id != 0 || _amount != 0) revert InvalidPermitParams();
            prevIsOperator = isOperator[_owner][_spender];

            _setOperator({ _owner: _owner, _operator: _spender, _approved: true });
        } else {
            prevAllowance = allowance[_owner][_spender][_id];

            _approve({ _owner: _owner, _spender: _spender, _id: _id, _amount: _amount });
        }
    }

    function _validateApproveAndCallSignature(
        bool _temporary,
        address _owner,
        address _spender,
        bool _operator,
        uint256 _id,
        uint256 _amount,
        address _target,
        bytes memory _data,
        uint256 _nonce,
        uint48 _deadline,
        bytes memory _signature
    )
        internal
        view
    {
        if (block.timestamp > _deadline) revert ExpiredSignature(_deadline);

        bytes32 messageHash = _hashApproveAndCallMessage({
            _temporary: _temporary,
            _owner: _owner,
            _spender: _spender,
            _operator: _operator,
            _id: _id,
            _amount: _amount,
            _target: _target,
            _data: _data,
            _nonce: _nonce,
            _deadline: _deadline
        });

        if (!SignatureChecker.isValidSignatureNow({ signer: _owner, hash: messageHash, signature: _signature })) {
            revert InvalidSigner();
        }
    }

    function _hashApproveAndCallMessage(
        bool _temporary,
        address _owner,
        address _spender,
        bool _operator,
        uint256 _id,
        uint256 _amount,
        address _target,
        bytes memory _data,
        uint256 _nonce,
        uint48 _deadline
    )
        internal
        view
        returns (bytes32)
    {
        return _hashTypedDataV4({
            structHash: keccak256(
                abi.encode(
                    APPROVE_AND_CALL_TYPE_HASH,
                    _temporary,
                    _owner,
                    _spender,
                    _operator,
                    _id,
                    _amount,
                    _target,
                    keccak256(_data),
                    _nonce,
                    _deadline
                )
                )
        });
    }

    function DOMAIN_SEPARATOR() external view virtual returns (bytes32) {
        return _domainSeparatorV4();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/ShortStrings.sol)

pragma solidity ^0.8.8;

import "./StorageSlot.sol";

// | string  | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA   |
// | length  | 0x                                                              BB |
type ShortString is bytes32;

/**
 * @dev This library provides functions to convert short memory strings
 * into a `ShortString` type that can be used as an immutable variable.
 *
 * Strings of arbitrary length can be optimized using this library if
 * they are short enough (up to 31 bytes) by packing them with their
 * length (1 byte) in a single EVM word (32 bytes). Additionally, a
 * fallback mechanism can be used for every other case.
 *
 * Usage example:
 *
 * ```solidity
 * contract Named {
 *     using ShortStrings for *;
 *
 *     ShortString private immutable _name;
 *     string private _nameFallback;
 *
 *     constructor(string memory contractName) {
 *         _name = contractName.toShortStringWithFallback(_nameFallback);
 *     }
 *
 *     function name() external view returns (string memory) {
 *         return _name.toStringWithFallback(_nameFallback);
 *     }
 * }
 * ```
 */
library ShortStrings {
    // Used as an identifier for strings longer than 31 bytes.
    bytes32 private constant _FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF;

    error StringTooLong(string str);
    error InvalidShortString();

    /**
     * @dev Encode a string of at most 31 chars into a `ShortString`.
     *
     * This will trigger a `StringTooLong` error is the input string is too long.
     */
    function toShortString(string memory str) internal pure returns (ShortString) {
        bytes memory bstr = bytes(str);
        if (bstr.length > 31) {
            revert StringTooLong(str);
        }
        return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length));
    }

    /**
     * @dev Decode a `ShortString` back to a "normal" string.
     */
    function toString(ShortString sstr) internal pure returns (string memory) {
        uint256 len = byteLength(sstr);
        // using `new string(len)` would work locally but is not memory safe.
        string memory str = new string(32);
        /// @solidity memory-safe-assembly
        assembly {
            mstore(str, len)
            mstore(add(str, 0x20), sstr)
        }
        return str;
    }

    /**
     * @dev Return the length of a `ShortString`.
     */
    function byteLength(ShortString sstr) internal pure returns (uint256) {
        uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF;
        if (result > 31) {
            revert InvalidShortString();
        }
        return result;
    }

    /**
     * @dev Encode a string into a `ShortString`, or write it to storage if it is too long.
     */
    function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) {
        if (bytes(value).length < 32) {
            return toShortString(value);
        } else {
            StorageSlot.getStringSlot(store).value = value;
            return ShortString.wrap(_FALLBACK_SENTINEL);
        }
    }

    /**
     * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
     */
    function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) {
        if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) {
            return toString(value);
        } else {
            return store;
        }
    }

    /**
     * @dev Return the length of a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
     *
     * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of
     * actual characters as the UTF-8 encoding of a single character can span over multiple bytes.
     */
    function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) {
        if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) {
            return byteLength(value);
        } else {
            return bytes(store).length;
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

import { IERC5267 } from "@openzeppelin/contracts/interfaces/IERC5267.sol";

/**
 * @author https://github.com/frangio/erc6909-extensions
 */
interface IERC6909X is IERC5267 {
    function temporaryApproveAndCall(
        address spender,
        bool operator,
        uint256 id,
        uint256 amount,
        address target,
        bytes calldata data
    )
        external
        returns (bool);

    function temporaryApproveAndCallBySig(
        address owner,
        address spender,
        bool operator,
        uint256 id,
        uint256 amount,
        address target,
        bytes calldata data,
        uint256 nonce,
        uint48 deadline,
        bytes calldata signature
    )
        external
        returns (bool);

    function approveBySig(
        address owner,
        address spender,
        bool operator,
        uint256 id,
        uint256 amount,
        uint256 nonce,
        uint48 deadline,
        bytes calldata signature
    )
        external
        returns (bool);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

interface IERC6909XCallback {
    function onTemporaryApprove(
        address owner,
        bool operator,
        uint256 id,
        uint256 amount,
        bytes calldata data
    )
        external
        returns (bytes4);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

/**
 * @title Track user nonces.
 * @dev Inspired by Uniswap's Permit2 UnorderedNonces.
 */
abstract contract UnorderedNonces {
    /* -------------------------------------------------------------------------- */
    /*                                   ERRORS                                   */
    /* -------------------------------------------------------------------------- */

    error InvalidNonce();

    /* -------------------------------------------------------------------------- */
    /*                                   EVENTS                                   */
    /* -------------------------------------------------------------------------- */

    event NonceInvalidation(address indexed owner, uint256 indexed nonce);

    /* -------------------------------------------------------------------------- */
    /*                                   STORAGE                                  */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Mapping of token owner to a specified word to a bitmap.
     * @dev word is capped at type(uint248).max.
     * @dev returns a uint256 bitmap.
     */
    mapping(address account => mapping(uint256 word => uint256 bitMap)) public nonceBitMap;

    /* -------------------------------------------------------------------------- */
    /*                             EXTERNAL FUNCTIONS                             */
    /* -------------------------------------------------------------------------- */

    /**
     * @notice Invalidates the nonce for the msg.sender.
     * @dev if the nonce is already invalidated, the function will succeed.
     * @param _nonce nonce to invalidate.
     */
    function invalidateNonce(uint256 _nonce) external {
        (uint256 word, uint256 bit) = calculateWordAndBit(_nonce);

        // flip the bit in the bitmap by taking a bitwise OR.
        // if the bit is already flipped, the result will be the same.
        nonceBitMap[msg.sender][word] |= bit;

        emit NonceInvalidation(msg.sender, _nonce);
    }

    /**
     * @notice Check if a nonce can be used for a given address.
     * @param _from address to check.
     * @param _nonce nonce to check.
     * @return isValid returns true if the nonce is unused, false otherwise.
     */
    function isValidNonce(address _from, uint256 _nonce) external view returns (bool) {
        (uint256 word, uint256 bit) = calculateWordAndBit(_nonce);

        return nonceBitMap[_from][word] & bit == 0;
    }

    /* -------------------------------------------------------------------------- */
    /*                             INTERNAL FUNCTIONS                             */
    /* -------------------------------------------------------------------------- */

    function useNonce(address _from, uint256 _nonce) internal {
        (uint256 word, uint256 bit) = calculateWordAndBit(_nonce);

        // flip the bit in the bitmap by taking a bitwise XOR.
        uint256 flipped = nonceBitMap[_from][word] ^= bit;

        // check if the bit was already flipped.
        if (flipped & bit == 0) revert InvalidNonce();

        emit NonceInvalidation(_from, _nonce);
    }

    function calculateWordAndBit(uint256 _nonce) internal pure returns (uint256 word, uint256 bit) {
        // word is nonce divided by 256.
        word = uint256(_nonce) >> 8;

        // bit is 1 shifted left by the nonce modulo 256.
        bit = 1 << uint8(_nonce);
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

import { IERC165 } from "../interfaces/IERC165.sol";
import { IERC6909 } from "../interfaces/IERC6909.sol";

/// @notice Minimalist and gas efficient standard ERC6909 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC6909.sol)
abstract contract ERC6909 is IERC6909 {
    /* -------------------------------------------------------------------------- */
    /*                               ERC6909 STORAGE                              */
    /* -------------------------------------------------------------------------- */

    /// @inheritdoc IERC6909
    mapping(address owner => mapping(address operator => bool approved)) public isOperator;

    /// @inheritdoc IERC6909
    mapping(address owner => mapping(uint256 id => uint256 amount)) public balanceOf;

    /// @inheritdoc IERC6909
    mapping(address owner => mapping(address spender => mapping(uint256 tokenId => uint256 amount))) public allowance;

    /* -------------------------------------------------------------------------- */
    /*                                ERC6909 LOGIC                               */
    /* -------------------------------------------------------------------------- */

    /// @inheritdoc IERC6909
    function transfer(address _receiver, uint256 _id, uint256 _amount) public virtual returns (bool) {
        balanceOf[msg.sender][_id] -= _amount;

        balanceOf[_receiver][_id] += _amount;

        emit Transfer({ caller: msg.sender, sender: msg.sender, receiver: _receiver, id: _id, amount: _amount });

        return true;
    }

    /// @inheritdoc IERC6909
    function transferFrom(
        address _sender,
        address _receiver,
        uint256 _id,
        uint256 _amount
    )
        public
        virtual
        returns (bool)
    {
        if (msg.sender != _sender && !isOperator[_sender][msg.sender]) {
            uint256 allowed = allowance[_sender][msg.sender][_id];
            if (allowed != type(uint256).max) allowance[_sender][msg.sender][_id] = allowed - _amount;
        }

        balanceOf[_sender][_id] -= _amount;

        balanceOf[_receiver][_id] += _amount;

        emit Transfer({ caller: msg.sender, sender: _sender, receiver: _receiver, id: _id, amount: _amount });

        return true;
    }

    /// @inheritdoc IERC6909
    function approve(address _spender, uint256 _id, uint256 _amount) public virtual returns (bool) {
        return _approve({ _owner: msg.sender, _spender: _spender, _id: _id, _amount: _amount });
    }

    /// @inheritdoc IERC6909
    function setOperator(address _operator, bool _approved) public virtual returns (bool) {
        return _setOperator({ _owner: msg.sender, _operator: _operator, _approved: _approved });
    }

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

    /// @inheritdoc IERC165
    function supportsInterface(bytes4 _interfaceId) public view virtual returns (bool) {
        return _interfaceId == type(IERC6909).interfaceId || _interfaceId == type(IERC165).interfaceId;
    }

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

    function _mint(address _receiver, uint256 _id, uint256 _amount) internal virtual {
        balanceOf[_receiver][_id] += _amount;

        emit Transfer({ caller: msg.sender, sender: address(0), receiver: _receiver, id: _id, amount: _amount });
    }

    function _burn(address _sender, uint256 _id, uint256 _amount) internal virtual {
        balanceOf[_sender][_id] -= _amount;

        emit Transfer({ caller: msg.sender, sender: _sender, receiver: address(0), id: _id, amount: _amount });
    }

    function _setOperator(address _owner, address _operator, bool _approved) internal virtual returns (bool) {
        isOperator[_owner][_operator] = _approved;

        emit OperatorSet({ owner: _owner, spender: _operator, approved: _approved });

        return true;
    }

    function _approve(address _owner, address _spender, uint256 _id, uint256 _amount) internal virtual returns (bool) {
        allowance[_owner][_spender][_id] = _amount;

        emit Approval({ owner: _owner, spender: _spender, id: _id, amount: _amount });

        return true;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol)

pragma solidity ^0.8.8;

import "./ECDSA.sol";
import "../ShortStrings.sol";
import "../../interfaces/IERC5267.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
 * separator of the implementation contract. This will cause the `_domainSeparatorV4` function to always rebuild the
 * separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
 *
 * _Available since v3.4._
 *
 * @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
 */
abstract contract EIP712 is IERC5267 {
    using ShortStrings for *;

    bytes32 private constant _TYPE_HASH =
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _cachedDomainSeparator;
    uint256 private immutable _cachedChainId;
    address private immutable _cachedThis;

    bytes32 private immutable _hashedName;
    bytes32 private immutable _hashedVersion;

    ShortString private immutable _name;
    ShortString private immutable _version;
    string private _nameFallback;
    string private _versionFallback;

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        _name = name.toShortStringWithFallback(_nameFallback);
        _version = version.toShortStringWithFallback(_versionFallback);
        _hashedName = keccak256(bytes(name));
        _hashedVersion = keccak256(bytes(version));

        _cachedChainId = block.chainid;
        _cachedDomainSeparator = _buildDomainSeparator();
        _cachedThis = address(this);
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _cachedThis && block.chainid == _cachedChainId) {
            return _cachedDomainSeparator;
        } else {
            return _buildDomainSeparator();
        }
    }

    function _buildDomainSeparator() private view returns (bytes32) {
        return keccak256(abi.encode(_TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    /**
     * @dev See {EIP-5267}.
     *
     * _Available since v4.9._
     */
    function eip712Domain()
        public
        view
        virtual
        override
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        )
    {
        return (
            hex"0f", // 01111
            _name.toStringWithFallback(_nameFallback),
            _version.toStringWithFallback(_versionFallback),
            block.chainid,
            address(this),
            bytes32(0),
            new uint256[](0)
        );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/SignatureChecker.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";
import "../../interfaces/IERC1271.sol";

/**
 * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA
 * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like
 * Argent and Gnosis Safe.
 *
 * _Available since v4.1._
 */
library SignatureChecker {
    /**
     * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the
     * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidSignatureNow(address signer, bytes32 hash, bytes memory signature) internal view returns (bool) {
        (address recovered, ECDSA.RecoverError error) = ECDSA.tryRecover(hash, signature);
        return
            (error == ECDSA.RecoverError.NoError && recovered == signer) ||
            isValidERC1271SignatureNow(signer, hash, signature);
    }

    /**
     * @dev Checks if a signature is valid for a given signer and data hash. The signature is validated
     * against the signer smart contract using ERC1271.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidERC1271SignatureNow(
        address signer,
        bytes32 hash,
        bytes memory signature
    ) internal view returns (bool) {
        (bool success, bytes memory result) = signer.staticcall(
            abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature)
        );
        return (success &&
            result.length >= 32 &&
            abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5267.sol)

pragma solidity ^0.8.0;

interface IERC5267 {
    /**
     * @dev MAY be emitted to signal that the domain could have changed.
     */
    event EIP712DomainChanged();

    /**
     * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
     * signature.
     */
    function eip712Domain()
        external
        view
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        );
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

interface IERC165 {
    /// @notice Checks if a contract implements an interface.
    /// @param interfaceId The interface identifier, as specified in ERC-165.
    /// @return supported True if the contract implements `interfaceId` and
    /// `interfaceId` is not 0xffffffff, false otherwise.
    function supportsInterface(bytes4 interfaceId) external view returns (bool supported);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.23;

import { IERC165 } from "./IERC165.sol";

/// @title ERC6909 Core Interface
/// @author jtriley.eth
interface IERC6909 is IERC165 {
    /// @notice The event emitted when a transfer occurs.
    /// @param caller The caller of the transfer.
    /// @param sender The address of the sender.
    /// @param receiver The address of the receiver.
    /// @param id The id of the token.
    /// @param amount The amount of the token.
    event Transfer(
        address caller, address indexed sender, address indexed receiver, uint256 indexed id, uint256 amount
    );

    /// @notice The event emitted when an operator is set.
    /// @param owner The address of the owner.
    /// @param spender The address of the spender.
    /// @param approved The approval status.
    event OperatorSet(address indexed owner, address indexed spender, bool approved);

    /// @notice The event emitted when an approval occurs.
    /// @param owner The address of the owner.
    /// @param spender The address of the spender.
    /// @param id The id of the token.
    /// @param amount The amount of the token.
    event Approval(address indexed owner, address indexed spender, uint256 indexed id, uint256 amount);

    /// @notice Owner balance of an id.
    /// @param owner The address of the owner.
    /// @param id The id of the token.
    /// @return amount The balance of the token.
    function balanceOf(address owner, uint256 id) external view returns (uint256 amount);

    /// @notice Spender allowance of an id.
    /// @param owner The address of the owner.
    /// @param spender The address of the spender.
    /// @param id The id of the token.
    /// @return amount The allowance of the token.
    function allowance(address owner, address spender, uint256 id) external view returns (uint256 amount);

    /// @notice Checks if a spender is approved by an owner as an operator
    /// @param owner The address of the owner.
    /// @param spender The address of the spender.
    /// @return approved The approval status.
    function isOperator(address owner, address spender) external view returns (bool approved);

    /// @notice Transfers an amount of an id from the caller to a receiver.
    /// @param receiver The address of the receiver.
    /// @param id The id of the token.
    /// @param amount The amount of the token.
    function transfer(address receiver, uint256 id, uint256 amount) external returns (bool);

    /// @notice Transfers an amount of an id from a sender to a receiver.
    /// @param sender The address of the sender.
    /// @param receiver The address of the receiver.
    /// @param id The id of the token.
    /// @param amount The amount of the token.
    function transferFrom(address sender, address receiver, uint256 id, uint256 amount) external returns (bool);

    /// @notice Approves an amount of an id to a spender.
    /// @param spender The address of the spender.
    /// @param id The id of the token.
    /// @param amount The amount of the token.
    function approve(address spender, uint256 id, uint256 amount) external returns (bool);

    /// @notice Sets or removes a spender as an operator for the caller.
    /// @param spender The address of the spender.
    /// @param approved The approval status.
    function setOperator(address spender, bool approved) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, "\x19Ethereum Signed Message:\n32")
            mstore(0x1c, hash)
            message := keccak256(0x00, 0x3c)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, "\x19\x01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            data := keccak256(ptr, 0x42)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Data with intended validator, created from a
     * `validator` and `data` according to the version 0 of EIP-191.
     *
     * See {recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x00", validator, data));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 *
 * _Available since v4.1._
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _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) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @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] = _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);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

{
  "remappings": [
    "@prb/test/=node_modules/@prb/test/src/",
    "forge-std/=node_modules/forge-std/src/",
    "@openzeppelin/contracts/=node_modules/@openzeppelin/contracts/",
    "solady/=node_modules/solady/src/",
    "multicaller/=node_modules/multicaller/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 5000000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "viaIR": true,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000001453706c6974732057726170706564204574686572000000000000000000000000000000000000000000000000000000000000000000000000000000000000000973706c6974734554480000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _native_token_name (string): Splits Wrapped Ether
Arg [1] : _native_token_symbol (string): splitsETH

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000014
Arg [3] : 53706c6974732057726170706564204574686572000000000000000000000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000009
Arg [5] : 73706c6974734554480000000000000000000000000000000000000000000000