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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.18;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import {EIP712} from "@openzeppelin/contracts/utils/cryptography/EIP712.sol";
import {IMemefiManagement} from "../management/IMemefiManagement.sol";
import {MemefiSwapable} from "./MemefiSwapable.sol";
import {IFeesDistributor} from "./IFeesDistributor.sol";

contract MemefiKeys is MemefiSwapable, EIP712 {
    modifier onlyMainAdmin() {
        require(msg.sender == memefiManagement.mainAdmin(), "Not a main owner");
        _;
    }

    // --------- EVENTS ---------- //
    event Trade(
        address indexed trader,
        address indexed subject,
        uint256 keyAmount,
        uint256 tokenAmount,
        uint256 protocolFee,
        uint256 subjectFee,
        uint256 supply,
        uint256 nonce,
        uint256 rewardIndexOf,
        uint256 pendingRewards,
        bool isBuy,
        bool isSwapped
    );

    event Payed(
        address indexed payer,
        uint256 paymentType,
        address paymentToken,
        uint256 amount,
        uint256 nonce
    );

    event RewardAdded(
        address indexed subject,
        uint256 amount,
        uint256 rewardIndex,
        uint256[] nonces
    );

    event RewardWithdraw(
        address indexed receiver,
        address indexed subject,
        uint256 amount,
        uint256 rewardIndexOf
    );

    event NewSigner(address newSigner);

    event NewRewardDistributor(address newRewardDistributor);

    // --------- VARIABLES ---------- //
    uint256 public protocolFeePercent;
    uint256 public subjectFeePercent;
    uint256 public revenueFeePercent;
    uint256 public constant firstKeyPrice = 6e13; // 0,00006 ETH

    IFeesDistributor public feesDistributor;

    // Nonce => used times
    mapping(uint256 => uint256) public nonceUsingCount;

    // KeysSubject => (Holder => Balance)
    mapping(address => mapping(address => uint256)) public keysBalance;

    // KeysSubject => Supply
    mapping(address => uint256) public keysSupply;

    uint256 private constant MULTIPLIER = 1e18;
    // KeysSubject => RewardIndex
    mapping(address => uint256) private rewardIndex;
    // KeysSubject => (Holder => RewardIndex)
    mapping(address => mapping(address => uint256)) private rewardIndexOf;
    // KeysSubject => (Holder => Earned)
    mapping(address => mapping(address => uint256)) private earned;

    // --------- CONSTRUCTOR ---------- //

    constructor(
        address _memefiManagement
    )
        EIP712("Memefi", "1")
        MemefiSwapable(_memefiManagement)
    {
        feesDistributor = IFeesDistributor(memefiManagement.feesDistributor());
        protocolFeePercent = 30000000000000000;
        subjectFeePercent = 30000000000000000;
        revenueFeePercent = 40000000000000000;
    }

    // --------- ADMIN FUNCTIONS ---------- //

    function setFees(
        uint256 _protocolFeePercent,
        uint256 _subjectFeePercent,
        uint256 _revenueFeePercent
    ) public onlyMainAdmin {
        require(
            _protocolFeePercent + _subjectFeePercent + _revenueFeePercent <=
                100000000000000000,
            "Fees must be less than 10%"
        );
        protocolFeePercent = _protocolFeePercent;
        subjectFeePercent = _subjectFeePercent;
        revenueFeePercent = _revenueFeePercent;
    }

    // --------- MATH FUNCTIONS ---------- //
    function _calculatePriceAndFees(
        uint256 supply,
        uint256 amount
    ) internal view returns (uint256, uint256, uint256, uint256) {
        uint256 price = getPrice(supply, amount);
        (
            uint256 protocolFee,
            uint256 subjectFee,
            uint256 revenueFee
        ) = _calculateFees(price);
        return (price, protocolFee, subjectFee, revenueFee);
    }

    function _calculateFees(
        uint256 price
    ) internal view returns (uint256, uint256, uint256) {
        uint256 protocolFee = (price * protocolFeePercent) / 1 ether;
        uint256 subjectFee = (price * subjectFeePercent) / 1 ether;
        uint256 revenueFee = (price * revenueFeePercent) / 1 ether;
        return (protocolFee, subjectFee, revenueFee);
    }

    function getPrice(
        uint256 supply,
        uint256 amount
    ) public view returns (uint256) {
        if (amount == 0) return 0;
        if (supply == 0) {
            return firstKeyPrice + getPrice(1, amount - 1);
        }
        uint256 sum1 = ((supply - 1) * (supply) * (2 * (supply - 1) + 1)) / 6;
        uint256 sum2 = ((supply - 1 + amount) *
            (supply + amount) *
            (2 * (supply - 1 + amount) + 1)) / 6;
        uint256 summation = sum2 - sum1;
        uint256 price = ((summation * 1 ether) / 16000);

        if (isSwapped) {
            return _calculateMemefiFromEth(price);
        }
        return price;
    }

    function getBuyPrice(
        address keysSubject,
        uint256 amount
    ) public view returns (uint256) {
        return getPrice(keysSupply[keysSubject], amount);
    }

    function getSellPrice(
        address keysSubject,
        uint256 amount
    ) public view returns (uint256) {
        return getPrice(keysSupply[keysSubject] - amount, amount);
    }

    function getBuyPriceAfterFee(
        address keysSubject,
        uint256 amount
    ) public view returns (uint256) {
        uint256 price = getBuyPrice(keysSubject, amount);
        (
            uint256 protocolFee,
            uint256 subjectFee,
            uint256 revenueFee
        ) = _calculateFees(price);
        return price + protocolFee + subjectFee + revenueFee;
    }

    function getSellPriceAfterFee(
        address keysSubject,
        uint256 amount
    ) public view returns (uint256) {
        uint256 price = getSellPrice(keysSubject, amount);
        (
            uint256 protocolFee,
            uint256 subjectFee,
            uint256 revenueFee
        ) = _calculateFees(price);
        return price - protocolFee - subjectFee - revenueFee;
    }

    function calculateReward(
        address keysSubject,
        address account
    ) external view returns (uint256) {
        return
            earned[keysSubject][account] +
            _calculateRewards(keysSubject, account);
    }

    function _updateRewards(address keysSubject, address account) private {
        earned[keysSubject][account] += _calculateRewards(keysSubject, account);
        rewardIndexOf[keysSubject][account] = rewardIndex[keysSubject];
    }

    // --------- SIGNATURE FUNCTIONS ---------- //

    function _checkSignatureKeys(
        address paymentToken,
        uint256 paymentAmount,
        uint256[] memory itemIds,
        uint256[] memory itemMaxUsers,
        uint256 paymentType,
        uint256 nonce,
        uint256 deadline,
        bytes memory signature
    ) internal returns (bool) {
        require(deadline >= block.timestamp, "Signature expired");

        bytes32 typedHash = _hashTypedDataV4(
            keccak256(
                abi.encode(
                    keccak256(
                        "Payment(address executor,address paymentToken,uint256 paymentAmount,uint256[] itemIds,uint256[] itemMaxUsers,uint256 paymentType,uint256 nonce,uint256 deadline)"
                    ),
                    msg.sender,
                    paymentToken,
                    paymentAmount,
                    keccak256(abi.encodePacked(itemIds)),
                    keccak256(abi.encodePacked(itemMaxUsers)),
                    paymentType,
                    nonce,
                    deadline
                )
            )
        );

        return ECDSA.recover(typedHash, signature) == memefiManagement.signer();
    }

    function _checkSignatureRewards(
        address subject,
        uint256 amount,
        uint256 amountToSubject,
        uint256 nonce,
        bytes memory signature
    ) internal returns (bool) {
        bytes32 typedHash = _hashTypedDataV4(
            keccak256(
                abi.encode(
                    keccak256(
                        "AddReward(address subject,uint256 amount,uint256 amountToSubject,uint256 nonce)"
                    ),
                    subject,
                    amount,
                    amountToSubject,
                    nonce
                )
            )
        );

        return ECDSA.recover(typedHash, signature) == memefiManagement.signer();
    }

    // --------- REENTRENCY FUNCTIONS ---------- //

    function _useNonce(uint256 nonce, uint256 maxUseCount) internal {
        require(nonceUsingCount[nonce] < maxUseCount, "Nonce already used");
        nonceUsingCount[nonce] += 1;
    }

    // --------- MAIN FUNCTIONS ---------- //

    function _paymentTransfer(
        address paymentToken,
        uint256 paymentAmount,
        uint256 price,
        uint256 protocolFee,
        uint256 subjectFee,
        uint256 revenueFee
    ) internal {
        uint256 ethPaymentAmount = paymentToken == address(0)
            ? paymentAmount
            : 0;
        if (paymentToken == address(0)) {
            require(
                msg.value ==
                    price +
                        protocolFee +
                        subjectFee +
                        revenueFee +
                        ethPaymentAmount,
                "Insufficient payment"
            );
        } else {
            if (paymentAmount > 0) {
                IERC20(paymentToken).transferFrom(
                    msg.sender,
                    memefiManagement.treasury(),
                    paymentAmount
                );
            }
        }
    }

    function _addKeysBalanceAndSupply(
        address keysSubject,
        uint256 amount
    ) internal {
        keysBalance[keysSubject][msg.sender] += amount;
        keysSupply[keysSubject] += amount;
    }

    function _removeKeysBalanceAndSupply(
        address keysSubject,
        uint256 amount
    ) internal {
        keysBalance[keysSubject][msg.sender] -= amount;
        keysSupply[keysSubject] -= amount;
    }

    function _addKeysWithTransfer(
        address paymentToken,
        uint256 paymentAmount,
        uint256 supply,
        uint256 amount,
        address keysSubject,
        uint256 nonce
    ) internal {
        (
            uint256 price,
            uint256 protocolFee,
            uint256 subjectFee,
            uint256 revenueFee
        ) = _calculatePriceAndFees(supply, amount);

        _paymentTransfer(
            paymentToken,
            paymentAmount,
            price,
            protocolFee,
            subjectFee,
            revenueFee
        );

        _addKeysBalanceAndSupply(keysSubject, amount);

        _transferTokens(
            keysSubject,
            price,
            protocolFee,
            subjectFee,
            revenueFee,
            false
        );

        _emitTrade(
            keysSubject,
            amount,
            price,
            protocolFee,
            subjectFee,
            nonce,
            true
        );
    }

    function _emitTrade(
        address keySubject,
        uint256 amount,
        uint256 price,
        uint256 protocolFee,
        uint256 subjectFee,
        uint256 nonce,
        bool isBuy
    ) internal {
        uint256 rewardIndexOfP = rewardIndexOf[keySubject][msg.sender];
        uint256 earnedP = _calculateRewards(keySubject, msg.sender);
        uint256 supply = keysSupply[keySubject];
        emit Trade(
            msg.sender,
            keySubject,
            amount,
            price,
            protocolFee,
            subjectFee,
            supply,
            nonce,
            rewardIndexOfP,
            earnedP,
            isBuy,
            isSwapped
        );
    }

    function _removeKeysWithTransfer(
        uint256 supply,
        uint256 amount,
        address keysSubject
    ) internal {
        (
            uint256 price,
            uint256 protocolFee,
            uint256 subjectFee,
            uint256 revenueFee
        ) = _calculatePriceAndFees(supply - amount, amount);
        require(
            keysBalance[keysSubject][msg.sender] >= amount,
            "Insufficient keys"
        );
        
        _removeKeysBalanceAndSupply(keysSubject, amount);

        _transferTokens(
            keysSubject,
            price,
            protocolFee,
            subjectFee,
            revenueFee,
            true
        );

        _emitTrade(
            keysSubject,
            amount,
            price,
            protocolFee,
            subjectFee,
            0,
            false
        );
    }

    function _transaferEthIfNeeded(address to, uint256 amount) internal {
        if (amount > 0) {
            (bool success, ) = to.call{value: amount}("");
            require(success, "Unable to send funds");
        }
    }

    function _transferMemefiIfNeeded(address to, uint256 amount) internal {
        if (amount > 0) {
            memefiToken.transfer(to, amount);
        }
    }

    function _transferTokens(
        address keysSubject,
        uint256 price,
        uint256 protocolFee,
        uint256 subjectFee,
        uint256 revenueFee,
        bool isSell
    ) internal {
        if (!isSwapped) {
            if (isSell) {
                _transaferEthIfNeeded(
                    msg.sender,
                    price - protocolFee - subjectFee - revenueFee
                );
            }
            _transaferEthIfNeeded(memefiManagement.treasury(), protocolFee);
            _transaferEthIfNeeded(keysSubject, subjectFee);
            feesDistributor.addReward{value: revenueFee}(revenueFee);
        } else {
            if (!isSell) {
                memefiToken.transferFrom(msg.sender, address(this), price);
            } else {
                memefiToken.transfer(
                    msg.sender,
                    price - protocolFee - subjectFee - revenueFee
                );
            }
            _transferMemefiIfNeeded(memefiManagement.treasury(), protocolFee);
            _transferMemefiIfNeeded(keysSubject, subjectFee);
            if (
                memefiToken.allowance(address(this), address(feesDistributor)) <
                revenueFee
            ) {
                memefiToken.approve(
                    address(feesDistributor),
                    type(uint256).max
                );
            }
            feesDistributor.addReward(revenueFee);
        }
    }

    function buyKeysWithPayment(
        address keysSubject,
        uint256 amount,
        address paymentToken,
        uint256 paymentAmount,
        uint256[] memory itemIds,
        uint256[] memory itemMaxUsers,
        uint256, // backwards compatibility
        uint256 nonce,
        uint256 deadline,
        bytes memory signature
    ) public payable {
        // we dont use pay() function because paymnet will be done in _buyKeys() function
        require(nonce > 0, "Nonce required");
        require(itemIds.length == itemMaxUsers.length, "Len mismatch");
        _useNonce(nonce, 1);
        for (uint256 i = 0; i < itemIds.length; i++) {
            _useNonce(itemIds[i], itemMaxUsers[i]);
        }
        require(
            _checkSignatureKeys(
                paymentToken,
                paymentAmount,
                itemIds,
                itemMaxUsers,
                0,
                nonce,
                deadline,
                signature
            ),
            "Invalid signature"
        );

        _buyKeys(paymentToken, paymentAmount, keysSubject, amount, nonce);
    }

    function pay(
        address paymentToken,
        uint256 paymentAmount,
        uint256[] memory itemIds,
        uint256[] memory itemMaxUsers,
        uint256 paymentType,
        uint256 nonce,
        uint256 deadline,
        bytes memory signature
    ) public payable {
        require(nonce > 0, "Nonce required");
        require(itemIds.length == itemMaxUsers.length, "Len mismatch");
        require(paymentAmount > 0, "Payment amount must be greater than 0");
        _useNonce(nonce, 1);
        for (uint256 i = 0; i < itemIds.length; i++) {
            _useNonce(itemIds[i], itemMaxUsers[i]);
        }
        require(
            _checkSignatureKeys(
                paymentToken,
                paymentAmount,
                itemIds,
                itemMaxUsers,
                paymentType,
                nonce,
                deadline,
                signature
            ),
            "Invalid signature"
        );

        if (paymentToken == address(0)) {
            require(msg.value == paymentAmount, "Invalid payment amount");
            (bool success, ) = memefiManagement.treasury().call{
                value: msg.value
            }("");
            require(success, "Unable to send funds");
        } else {
            IERC20(paymentToken).transferFrom(
                msg.sender,
                memefiManagement.treasury(),
                paymentAmount
            );
        }
        emit Payed(msg.sender, paymentType, paymentToken, paymentAmount, nonce);
    }

    function buyKeys(address keysSubject, uint256 amount) public payable {
        require(
            keysSupply[keysSubject] > 0,
            "Initial key must be bought with payment"
        );
        _buyKeys(address(0), 0, keysSubject, amount, 0);
    }

    function _buyKeys(
        address paymentToken,
        uint256 paymentAmount,
        address keysSubject,
        uint256 amount,
        uint256 nonce
    ) internal {
        uint256 supply = keysSupply[keysSubject];
        require(
            supply > 0 || keysSubject == msg.sender,
            "Only the keys' subject can buy the first key"
        );

        //Updating rewards
        _updateRewards(keysSubject, msg.sender);

        //Add keys
        _addKeysWithTransfer(
            paymentToken,
            paymentAmount,
            supply,
            amount,
            keysSubject,
            nonce
        );
    }

    function sellKeys(address keysSubject, uint256 amount) public payable {
        uint256 supply = keysSupply[keysSubject];
        require(supply > amount, "Cannot sell the last key");

        //Updating rewards
        _updateRewards(keysSubject, msg.sender);

        //Remove keys
        _removeKeysWithTransfer(supply, amount, keysSubject);
    }

    function addRewardsInBatches(
        address[] memory subjects,
        uint256[] memory amountsToAdd,
        uint256[] memory amountsToSubject,
        uint256[] memory nonces,
        bytes[] memory signatures
    ) external {
        require(subjects.length > 0, "No subjects");
        if (subjects.length == 1) {
            return
                addRewards(
                    subjects[0],
                    amountsToAdd,
                    amountsToSubject,
                    nonces,
                    signatures
                );
        }
        uint256 batchesCount;
        uint256[] memory batchesStartIndexes = new uint256[](subjects.length);
        for (uint256 i = 1; i < subjects.length; i++) {
            if (i == 0) {
                batchesCount++;
                batchesStartIndexes[batchesCount] = i;
            } else {
                if (subjects[i] != subjects[i - 1]) {
                    batchesCount++;
                    batchesStartIndexes[batchesCount] = i;
                }
            }
        }
        for (uint256 i = 0; i < batchesCount; i++) {
            uint256 batchStartIndex = batchesStartIndexes[i];
            uint256 batchLastIndex = i == batchesCount - 1
                ? subjects.length - 1
                : batchesStartIndexes[i + 1] - 1;
            uint256 len = batchLastIndex - batchStartIndex + 1;
            uint256[] memory batchAmountsToAdd = new uint256[](len);
            uint256[] memory batchAmountsToSubject = new uint256[](len);
            uint256[] memory batchNonces = new uint256[](len);
            bytes[] memory batchSignatures = new bytes[](len);
            for (uint256 j = batchStartIndex; j <= batchLastIndex; j++) {
                uint256 intIndex = j - batchStartIndex;
                batchAmountsToAdd[intIndex] = amountsToAdd[j];
                batchAmountsToSubject[intIndex] = amountsToSubject[j];
                batchNonces[intIndex] = nonces[j];
                batchSignatures[intIndex] = signatures[j];
            }
            addRewards(
                subjects[i],
                batchAmountsToAdd,
                batchAmountsToSubject,
                batchNonces,
                batchSignatures
            );
        }
    }

    function addRewards(
        address subject,
        uint256[] memory amountsToAdd,
        uint256[] memory amountsToSubject,
        uint256[] memory nonces,
        bytes[] memory signatures
    ) public {
        require(
            amountsToAdd.length == nonces.length &&
                nonces.length == amountsToSubject.length,
            "Arrays length mismatch"
        );

        require(
            keysBalance[subject][msg.sender] > 0,
            "Only keyholder can add rewards"
        );

        uint256 rewardsSum;
        uint256 sumToSubject;
        for (uint256 i = 0; i < amountsToAdd.length; i++) {
            require(
                _checkSignatureRewards(
                    subject,
                    amountsToAdd[i],
                    amountsToSubject[i],
                    nonces[i],
                    signatures[i]
                ),
                "Invalid signature"
            );
            _useNonce(nonces[i], 1);
            rewardsSum += amountsToAdd[i];
            sumToSubject += amountsToSubject[i];
        }

        _addReward(subject, rewardsSum, nonces);
        _withdrawReward(subject, msg.sender);

        if (!isSwapped) {
            (bool success1, ) = subject.call{value: sumToSubject}("");
            require(success1, "Unable to send funds");
        } else {
            memefiToken.transfer(subject, sumToSubject);
        }
    }

    function _addReward(
        address keysSubject,
        uint256 reward,
        uint256[] memory nonces
    ) internal {
        require(isSwapped, "Available only after swap");
        memefiToken.transferFrom(
            memefiManagement.rewardDistributor(),
            address(this),
            reward
        );
        rewardIndex[keysSubject] +=
            (reward * MULTIPLIER) /
            keysSupply[keysSubject];

        emit RewardAdded(keysSubject, reward, rewardIndex[keysSubject], nonces);
    }

    function _calculateRewards(
        address keysSubject,
        address account
    ) private view returns (uint256) {
        uint256 keys = keysBalance[keysSubject][account];
        return
            (keys *
                (rewardIndex[keysSubject] -
                    rewardIndexOf[keysSubject][account])) / MULTIPLIER;
    }

    function _withdrawReward(
        address keySubject,
        address rewardReceiver
    ) internal returns (uint256) {
        require(isSwapped, "Available only after swap");
        _updateRewards(keySubject, rewardReceiver);

        uint256 reward = earned[keySubject][rewardReceiver];

        if (reward > 0) {
            earned[keySubject][rewardReceiver] = 0;
            memefiToken.transfer(rewardReceiver, reward);
            emit RewardWithdraw(
                rewardReceiver,
                keySubject,
                reward,
                rewardIndexOf[keySubject][rewardReceiver]
            );
        }

        return reward;
    }

    function withdrawReward(address keySubject) public returns (uint256) {
        uint256 reward = _withdrawReward(keySubject, msg.sender);
        require(reward > 0, "No reward to withdraw");
        return reward;
    }

    function withdrawRewards(
        address[] memory keySubjects
    ) external returns (uint256) {
        uint256 totalReward;
        for (uint256 i = 0; i < keySubjects.length; i++) {
            totalReward += _withdrawReward(keySubjects[i], msg.sender);
        }
        require(totalReward > 0, "No reward to withdraw");
        return totalReward;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol)

pragma solidity ^0.8.20;

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: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ShortStrings.sol)

pragma solidity ^0.8.20;

import {StorageSlot} from "./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: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.20;

/**
 * @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(newImplementation.code.length > 0);
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 */
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 v5.0.0) (utils/Strings.sol)

pragma solidity ^0.8.20;

import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant HEX_DIGITS = "0123456789abcdef";
    uint8 private constant ADDRESS_LENGTH = 20;

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @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), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toStringSigned(int256 value) internal pure returns (string memory) {
        return string.concat(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) {
        uint256 localValue = value;
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = HEX_DIGITS[localValue & 0xf];
            localValue >>= 4;
        }
        if (localValue != 0) {
            revert StringsInsufficientHexLength(value, length);
        }
        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 bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.20;

/**
 * @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
    }

    /**
     * @dev The signature derives the `address(0)`.
     */
    error ECDSAInvalidSignature();

    /**
     * @dev The signature has an invalid length.
     */
    error ECDSAInvalidSignatureLength(uint256 length);

    /**
     * @dev The signature has an S value that is in the upper half order.
     */
    error ECDSAInvalidSignatureS(bytes32 s);

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not
     * return address(0) without also returning an error description. Errors are documented using an enum (error type)
     * and a bytes32 providing additional information about the error.
     *
     * If no error is returned, then the address can be used for verification purposes.
     *
     * The `ecrecover` EVM precompile 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 {MessageHashUtils-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]
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError, bytes32) {
        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, bytes32(signature.length));
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM precompile 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 {MessageHashUtils-toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature);
        _throwError(error, errorArg);
        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]
     */
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) {
        unchecked {
            bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
            // We do not check for an overflow here since the shift operation results in 0 or 1.
            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.
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs);
        _throwError(error, errorArg);
        return recovered;
    }

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

        // 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, bytes32(0));
        }

        return (signer, RecoverError.NoError, bytes32(0));
    }

    /**
     * @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, bytes32 errorArg) = tryRecover(hash, v, r, s);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided.
     */
    function _throwError(RecoverError error, bytes32 errorArg) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert ECDSAInvalidSignature();
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert ECDSAInvalidSignatureLength(uint256(errorArg));
        } else if (error == RecoverError.InvalidSignatureS) {
            revert ECDSAInvalidSignatureS(errorArg);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/EIP712.sol)

pragma solidity ^0.8.20;

import {MessageHashUtils} from "./MessageHashUtils.sol";
import {ShortStrings, ShortString} from "../ShortStrings.sol";
import {IERC5267} from "../../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 scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose
 * encoding is very generic and therefore its 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 order to
 * produce the hash of their typed data 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.
 *
 * @custom:oz-upgrades-unsafe-allow state-variable-immutable
 */
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 MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    /**
     * @dev See {IERC-5267}.
     */
    function eip712Domain()
        public
        view
        virtual
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        )
    {
        return (
            hex"0f", // 01111
            _EIP712Name(),
            _EIP712Version(),
            block.chainid,
            address(this),
            bytes32(0),
            new uint256[](0)
        );
    }

    /**
     * @dev The name parameter for the EIP712 domain.
     *
     * NOTE: By default this function reads _name which is an immutable value.
     * It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
     */
    // solhint-disable-next-line func-name-mixedcase
    function _EIP712Name() internal view returns (string memory) {
        return _name.toStringWithFallback(_nameFallback);
    }

    /**
     * @dev The version parameter for the EIP712 domain.
     *
     * NOTE: By default this function reads _version which is an immutable value.
     * It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
     */
    // solhint-disable-next-line func-name-mixedcase
    function _EIP712Version() internal view returns (string memory) {
        return _version.toStringWithFallback(_versionFallback);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MessageHashUtils.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing.
 *
 * The library provides methods for generating a hash of a message that conforms to the
 * https://eips.ethereum.org/EIPS/eip-191[EIP 191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712]
 * specifications.
 */
library MessageHashUtils {
    /**
     * @dev Returns the keccak256 digest of an EIP-191 signed data with version
     * `0x45` (`personal_sign` messages).
     *
     * The digest is calculated by prefixing a bytes32 `messageHash` with
     * `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the
     * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.
     *
     * NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with
     * keccak256, although any bytes32 value can be safely used because the final digest will
     * be re-hashed.
     *
     * See {ECDSA-recover}.
     */
    function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash
            mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix
            digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20)
        }
    }

    /**
     * @dev Returns the keccak256 digest of an EIP-191 signed data with version
     * `0x45` (`personal_sign` messages).
     *
     * The digest is calculated by prefixing an arbitrary `message` with
     * `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the
     * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.
     *
     * See {ECDSA-recover}.
     */
    function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) {
        return
            keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message));
    }

    /**
     * @dev Returns the keccak256 digest of an EIP-191 signed data with version
     * `0x00` (data with intended validator).
     *
     * The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended
     * `validator` address. Then hashing the result.
     *
     * See {ECDSA-recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked(hex"19_00", validator, data));
    }

    /**
     * @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`).
     *
     * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with
     * `\x19\x01` and hashing the result. It corresponds to the hash signed by the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712.
     *
     * See {ECDSA-recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, hex"19_01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            digest := keccak256(ptr, 0x42)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @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 towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (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 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                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.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

            ///////////////////////////////////////////////
            // 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.

            uint256 twos = denominator & (0 - denominator);
            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 (unsignedRoundsUp(rounding) && 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
     * towards zero.
     *
     * 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 + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * 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 + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.20;

/**
 * @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);
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.18;

interface IFeesDistributor {
    function addReward(uint256 reward) external payable;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.18;

import {IERC20Burnable} from "../tokens/IERC20Burnable.sol";
import {IMemefiManagement} from "../management/IMemefiManagement.sol";

abstract contract MemefiSwapable {
    event TokenSwap(bool swapped);

    bool public isSwapped;
    uint256 public ethToMemefiRate; // 1 full eth = n memefi
    IERC20Burnable public memefiToken;
    IMemefiManagement public memefiManagement;

    constructor(address _memefiManagement) {
        memefiManagement = IMemefiManagement(_memefiManagement);
        memefiToken = IERC20Burnable(memefiManagement.memefiToken());
    }

    function swapToMemefi(uint256 _ethToMemefiRate) virtual external {
        _swapToMemefi(_ethToMemefiRate);
    }

    function _swapToMemefi(uint256 _ethToMemefiRate) internal {
        require(msg.sender == address(memefiManagement), "Only management");
        require(!isSwapped, "Already swapped");
        isSwapped = true;
        ethToMemefiRate = _ethToMemefiRate;
        uint256 ethBalance = address(this).balance;
        (bool success, ) = memefiManagement.treasury().call{value: ethBalance}(
            ""
        );
        require(success, "Unable to send funds");
        uint256 memefiAmount = _calculateMemefiFromEth(ethBalance);
        memefiToken.transferFrom(msg.sender, address(this), memefiAmount);
        emit TokenSwap(true);
    }

    function _calculateMemefiFromEth(
        uint256 ethAmount
    ) internal view returns (uint256) {
        return (ethAmount * ethToMemefiRate) / 1 ether;
    }

    function _calculateEthFromMemefi(
        uint256 memefiAmount
    ) internal view returns (uint256) {
        return (memefiAmount * 1 ether) / ethToMemefiRate;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.18;

interface IMemefiManagement {
    function treasury() external returns (address);

    function signer() external returns (address);

    function rewardDistributor() external returns (address);

    function mainAdmin() external returns (address);

    function hasRole(
        uint256 role,
        address walletAddress
    ) external view returns (bool);

    function uniqueRoleAddress(
        uint256 uniqueRole
    ) external view returns (address);

    function memefiToken() external returns (address);

    function storageSlot(uint256 _slot) external view returns (string memory);

    function feesDistributor() external returns (address);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.18;

interface IERC20Burnable {
    /**
     * @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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value
    ) external returns (bool);

    function burn(uint256 amount) external;
    function burnFrom(address account, uint256 value) external;
}

{
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 15
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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