Token

Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "@openzeppelin/[email protected]/token/ERC20/ERC20.sol";
import "@openzeppelin/[email protected]/token/ERC20/extensions/ERC20Burnable.sol";
import "@openzeppelin/[email protected]/token/ERC20/extensions/ERC20Snapshot.sol";
import "@openzeppelin/[email protected]/access/Ownable.sol";
import "@openzeppelin/[email protected]/security/Pausable.sol";
import "@openzeppelin/[email protected]/token/ERC20/extensions/draft-ERC20Permit.sol";
import "@openzeppelin/[email protected]/token/ERC20/extensions/ERC20Votes.sol";
import "@openzeppelin/[email protected]/token/ERC20/extensions/ERC20FlashMint.sol";

contract Wealth is ERC20, ERC20Burnable, ERC20Snapshot, Ownable, Pausable, ERC20Permit, ERC20Votes, ERC20FlashMint {
    constructor() ERC20("Wealth", "Wealth") ERC20Permit("Wealth") {
        _mint(msg.sender, 4206900000 * 10 ** decimals());
    }

    function snapshot() public onlyOwner {
        _snapshot();
    }

    function pause() public onlyOwner {
        _pause();
    }

    function unpause() public onlyOwner {
        _unpause();
    }

    function _beforeTokenTransfer(address from, address to, uint256 amount)
        internal
        whenNotPaused
        override(ERC20, ERC20Snapshot)
    {
        super._beforeTokenTransfer(from, to, amount);
    }

    // The following functions are overrides required by Solidity.

    function _afterTokenTransfer(address from, address to, uint256 amount)
        internal
        override(ERC20, ERC20Votes)
    {
        super._afterTokenTransfer(from, to, amount);
    }

    function _mint(address to, uint256 amount)
        internal
        override(ERC20, ERC20Votes)
    {
        super._mint(to, amount);
    }

    function _burn(address account, uint256 amount)
        internal
        override(ERC20, ERC20Votes)
    {
        super._burn(account, amount);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/extensions/ERC20FlashMint.sol)

pragma solidity ^0.8.0;

import "../../../interfaces/IERC3156FlashBorrower.sol";
import "../../../interfaces/IERC3156FlashLender.sol";
import "../ERC20.sol";

/**
 * @dev Implementation of the ERC3156 Flash loans extension, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 *
 * Adds the {flashLoan} method, which provides flash loan support at the token
 * level. By default there is no fee, but this can be changed by overriding {flashFee}.
 *
 * _Available since v4.1._
 */
abstract contract ERC20FlashMint is ERC20, IERC3156FlashLender {
    bytes32 private constant _RETURN_VALUE = keccak256("ERC3156FlashBorrower.onFlashLoan");

    /**
     * @dev Returns the maximum amount of tokens available for loan.
     * @param token The address of the token that is requested.
     * @return The amount of token that can be loaned.
     */
    function maxFlashLoan(address token) public view virtual override returns (uint256) {
        return token == address(this) ? type(uint256).max - ERC20.totalSupply() : 0;
    }

    /**
     * @dev Returns the fee applied when doing flash loans. This function calls
     * the {_flashFee} function which returns the fee applied when doing flash
     * loans.
     * @param token The token to be flash loaned.
     * @param amount The amount of tokens to be loaned.
     * @return The fees applied to the corresponding flash loan.
     */
    function flashFee(address token, uint256 amount) public view virtual override returns (uint256) {
        require(token == address(this), "ERC20FlashMint: wrong token");
        return _flashFee(token, amount);
    }

    /**
     * @dev Returns the fee applied when doing flash loans. By default this
     * implementation has 0 fees. This function can be overloaded to make
     * the flash loan mechanism deflationary.
     * @param token The token to be flash loaned.
     * @param amount The amount of tokens to be loaned.
     * @return The fees applied to the corresponding flash loan.
     */
    function _flashFee(address token, uint256 amount) internal view virtual returns (uint256) {
        // silence warning about unused variable without the addition of bytecode.
        token;
        amount;
        return 0;
    }

    /**
     * @dev Returns the receiver address of the flash fee. By default this
     * implementation returns the address(0) which means the fee amount will be burnt.
     * This function can be overloaded to change the fee receiver.
     * @return The address for which the flash fee will be sent to.
     */
    function _flashFeeReceiver() internal view virtual returns (address) {
        return address(0);
    }

    /**
     * @dev Performs a flash loan. New tokens are minted and sent to the
     * `receiver`, who is required to implement the {IERC3156FlashBorrower}
     * interface. By the end of the flash loan, the receiver is expected to own
     * amount + fee tokens and have them approved back to the token contract itself so
     * they can be burned.
     * @param receiver The receiver of the flash loan. Should implement the
     * {IERC3156FlashBorrower-onFlashLoan} interface.
     * @param token The token to be flash loaned. Only `address(this)` is
     * supported.
     * @param amount The amount of tokens to be loaned.
     * @param data An arbitrary datafield that is passed to the receiver.
     * @return `true` if the flash loan was successful.
     */
    // This function can reenter, but it doesn't pose a risk because it always preserves the property that the amount
    // minted at the beginning is always recovered and burned at the end, or else the entire function will revert.
    // slither-disable-next-line reentrancy-no-eth
    function flashLoan(
        IERC3156FlashBorrower receiver,
        address token,
        uint256 amount,
        bytes calldata data
    ) public virtual override returns (bool) {
        require(amount <= maxFlashLoan(token), "ERC20FlashMint: amount exceeds maxFlashLoan");
        uint256 fee = flashFee(token, amount);
        _mint(address(receiver), amount);
        require(
            receiver.onFlashLoan(msg.sender, token, amount, fee, data) == _RETURN_VALUE,
            "ERC20FlashMint: invalid return value"
        );
        address flashFeeReceiver = _flashFeeReceiver();
        _spendAllowance(address(receiver), address(this), amount + fee);
        if (fee == 0 || flashFeeReceiver == address(0)) {
            _burn(address(receiver), amount + fee);
        } else {
            _burn(address(receiver), amount);
            _transfer(address(receiver), flashFeeReceiver, fee);
        }
        return true;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.1) (token/ERC20/extensions/ERC20Votes.sol)

pragma solidity ^0.8.0;

import "./draft-ERC20Permit.sol";
import "../../../utils/math/Math.sol";
import "../../../governance/utils/IVotes.sol";
import "../../../utils/math/SafeCast.sol";
import "../../../utils/cryptography/ECDSA.sol";

/**
 * @dev Extension of ERC20 to support Compound-like voting and delegation. This version is more generic than Compound's,
 * and supports token supply up to 2^224^ - 1, while COMP is limited to 2^96^ - 1.
 *
 * NOTE: If exact COMP compatibility is required, use the {ERC20VotesComp} variant of this module.
 *
 * This extension keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either
 * by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting
 * power can be queried through the public accessors {getVotes} and {getPastVotes}.
 *
 * By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it
 * requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked.
 *
 * _Available since v4.2._
 */
abstract contract ERC20Votes is IVotes, ERC20Permit {
    struct Checkpoint {
        uint32 fromBlock;
        uint224 votes;
    }

    bytes32 private constant _DELEGATION_TYPEHASH =
        keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");

    mapping(address => address) private _delegates;
    mapping(address => Checkpoint[]) private _checkpoints;
    Checkpoint[] private _totalSupplyCheckpoints;

    /**
     * @dev Get the `pos`-th checkpoint for `account`.
     */
    function checkpoints(address account, uint32 pos) public view virtual returns (Checkpoint memory) {
        return _checkpoints[account][pos];
    }

    /**
     * @dev Get number of checkpoints for `account`.
     */
    function numCheckpoints(address account) public view virtual returns (uint32) {
        return SafeCast.toUint32(_checkpoints[account].length);
    }

    /**
     * @dev Get the address `account` is currently delegating to.
     */
    function delegates(address account) public view virtual override returns (address) {
        return _delegates[account];
    }

    /**
     * @dev Gets the current votes balance for `account`
     */
    function getVotes(address account) public view virtual override returns (uint256) {
        uint256 pos = _checkpoints[account].length;
        return pos == 0 ? 0 : _checkpoints[account][pos - 1].votes;
    }

    /**
     * @dev Retrieve the number of votes for `account` at the end of `blockNumber`.
     *
     * Requirements:
     *
     * - `blockNumber` must have been already mined
     */
    function getPastVotes(address account, uint256 blockNumber) public view virtual override returns (uint256) {
        require(blockNumber < block.number, "ERC20Votes: block not yet mined");
        return _checkpointsLookup(_checkpoints[account], blockNumber);
    }

    /**
     * @dev Retrieve the `totalSupply` at the end of `blockNumber`. Note, this value is the sum of all balances.
     * It is but NOT the sum of all the delegated votes!
     *
     * Requirements:
     *
     * - `blockNumber` must have been already mined
     */
    function getPastTotalSupply(uint256 blockNumber) public view virtual override returns (uint256) {
        require(blockNumber < block.number, "ERC20Votes: block not yet mined");
        return _checkpointsLookup(_totalSupplyCheckpoints, blockNumber);
    }

    /**
     * @dev Lookup a value in a list of (sorted) checkpoints.
     */
    function _checkpointsLookup(Checkpoint[] storage ckpts, uint256 blockNumber) private view returns (uint256) {
        // We run a binary search to look for the earliest checkpoint taken after `blockNumber`.
        //
        // Initially we check if the block is recent to narrow the search range.
        // During the loop, the index of the wanted checkpoint remains in the range [low-1, high).
        // With each iteration, either `low` or `high` is moved towards the middle of the range to maintain the invariant.
        // - If the middle checkpoint is after `blockNumber`, we look in [low, mid)
        // - If the middle checkpoint is before or equal to `blockNumber`, we look in [mid+1, high)
        // Once we reach a single value (when low == high), we've found the right checkpoint at the index high-1, if not
        // out of bounds (in which case we're looking too far in the past and the result is 0).
        // Note that if the latest checkpoint available is exactly for `blockNumber`, we end up with an index that is
        // past the end of the array, so we technically don't find a checkpoint after `blockNumber`, but it works out
        // the same.
        uint256 length = ckpts.length;

        uint256 low = 0;
        uint256 high = length;

        if (length > 5) {
            uint256 mid = length - Math.sqrt(length);
            if (_unsafeAccess(ckpts, mid).fromBlock > blockNumber) {
                high = mid;
            } else {
                low = mid + 1;
            }
        }

        while (low < high) {
            uint256 mid = Math.average(low, high);
            if (_unsafeAccess(ckpts, mid).fromBlock > blockNumber) {
                high = mid;
            } else {
                low = mid + 1;
            }
        }

        return high == 0 ? 0 : _unsafeAccess(ckpts, high - 1).votes;
    }

    /**
     * @dev Delegate votes from the sender to `delegatee`.
     */
    function delegate(address delegatee) public virtual override {
        _delegate(_msgSender(), delegatee);
    }

    /**
     * @dev Delegates votes from signer to `delegatee`
     */
    function delegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual override {
        require(block.timestamp <= expiry, "ERC20Votes: signature expired");
        address signer = ECDSA.recover(
            _hashTypedDataV4(keccak256(abi.encode(_DELEGATION_TYPEHASH, delegatee, nonce, expiry))),
            v,
            r,
            s
        );
        require(nonce == _useNonce(signer), "ERC20Votes: invalid nonce");
        _delegate(signer, delegatee);
    }

    /**
     * @dev Maximum token supply. Defaults to `type(uint224).max` (2^224^ - 1).
     */
    function _maxSupply() internal view virtual returns (uint224) {
        return type(uint224).max;
    }

    /**
     * @dev Snapshots the totalSupply after it has been increased.
     */
    function _mint(address account, uint256 amount) internal virtual override {
        super._mint(account, amount);
        require(totalSupply() <= _maxSupply(), "ERC20Votes: total supply risks overflowing votes");

        _writeCheckpoint(_totalSupplyCheckpoints, _add, amount);
    }

    /**
     * @dev Snapshots the totalSupply after it has been decreased.
     */
    function _burn(address account, uint256 amount) internal virtual override {
        super._burn(account, amount);

        _writeCheckpoint(_totalSupplyCheckpoints, _subtract, amount);
    }

    /**
     * @dev Move voting power when tokens are transferred.
     *
     * Emits a {IVotes-DelegateVotesChanged} event.
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override {
        super._afterTokenTransfer(from, to, amount);

        _moveVotingPower(delegates(from), delegates(to), amount);
    }

    /**
     * @dev Change delegation for `delegator` to `delegatee`.
     *
     * Emits events {IVotes-DelegateChanged} and {IVotes-DelegateVotesChanged}.
     */
    function _delegate(address delegator, address delegatee) internal virtual {
        address currentDelegate = delegates(delegator);
        uint256 delegatorBalance = balanceOf(delegator);
        _delegates[delegator] = delegatee;

        emit DelegateChanged(delegator, currentDelegate, delegatee);

        _moveVotingPower(currentDelegate, delegatee, delegatorBalance);
    }

    function _moveVotingPower(
        address src,
        address dst,
        uint256 amount
    ) private {
        if (src != dst && amount > 0) {
            if (src != address(0)) {
                (uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[src], _subtract, amount);
                emit DelegateVotesChanged(src, oldWeight, newWeight);
            }

            if (dst != address(0)) {
                (uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[dst], _add, amount);
                emit DelegateVotesChanged(dst, oldWeight, newWeight);
            }
        }
    }

    function _writeCheckpoint(
        Checkpoint[] storage ckpts,
        function(uint256, uint256) view returns (uint256) op,
        uint256 delta
    ) private returns (uint256 oldWeight, uint256 newWeight) {
        uint256 pos = ckpts.length;

        Checkpoint memory oldCkpt = pos == 0 ? Checkpoint(0, 0) : _unsafeAccess(ckpts, pos - 1);

        oldWeight = oldCkpt.votes;
        newWeight = op(oldWeight, delta);

        if (pos > 0 && oldCkpt.fromBlock == block.number) {
            _unsafeAccess(ckpts, pos - 1).votes = SafeCast.toUint224(newWeight);
        } else {
            ckpts.push(Checkpoint({fromBlock: SafeCast.toUint32(block.number), votes: SafeCast.toUint224(newWeight)}));
        }
    }

    function _add(uint256 a, uint256 b) private pure returns (uint256) {
        return a + b;
    }

    function _subtract(uint256 a, uint256 b) private pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
     */
    function _unsafeAccess(Checkpoint[] storage ckpts, uint256 pos) private pure returns (Checkpoint storage result) {
        assembly {
            mstore(0, ckpts.slot)
            result.slot := add(keccak256(0, 0x20), pos)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/extensions/draft-ERC20Permit.sol)

pragma solidity ^0.8.0;

import "./draft-IERC20Permit.sol";
import "../ERC20.sol";
import "../../../utils/cryptography/ECDSA.sol";
import "../../../utils/cryptography/EIP712.sol";
import "../../../utils/Counters.sol";

/**
 * @dev Implementation 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.
 *
 * _Available since v3.4._
 */
abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {
    using Counters for Counters.Counter;

    mapping(address => Counters.Counter) private _nonces;

    // solhint-disable-next-line var-name-mixedcase
    bytes32 private constant _PERMIT_TYPEHASH =
        keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    /**
     * @dev In previous versions `_PERMIT_TYPEHASH` was declared as `immutable`.
     * However, to ensure consistency with the upgradeable transpiler, we will continue
     * to reserve a slot.
     * @custom:oz-renamed-from _PERMIT_TYPEHASH
     */
    // solhint-disable-next-line var-name-mixedcase
    bytes32 private _PERMIT_TYPEHASH_DEPRECATED_SLOT;

    /**
     * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
     *
     * It's a good idea to use the same `name` that is defined as the ERC20 token name.
     */
    constructor(string memory name) EIP712(name, "1") {}

    /**
     * @dev See {IERC20Permit-permit}.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual override {
        require(block.timestamp <= deadline, "ERC20Permit: expired deadline");

        bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));

        bytes32 hash = _hashTypedDataV4(structHash);

        address signer = ECDSA.recover(hash, v, r, s);
        require(signer == owner, "ERC20Permit: invalid signature");

        _approve(owner, spender, value);
    }

    /**
     * @dev See {IERC20Permit-nonces}.
     */
    function nonces(address owner) public view virtual override returns (uint256) {
        return _nonces[owner].current();
    }

    /**
     * @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view override returns (bytes32) {
        return _domainSeparatorV4();
    }

    /**
     * @dev "Consume a nonce": return the current value and increment.
     *
     * _Available since v4.1._
     */
    function _useNonce(address owner) internal virtual returns (uint256 current) {
        Counters.Counter storage nonce = _nonces[owner];
        current = nonce.current();
        nonce.increment();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/extensions/ERC20Snapshot.sol)

pragma solidity ^0.8.0;

import "../ERC20.sol";
import "../../../utils/Arrays.sol";
import "../../../utils/Counters.sol";

/**
 * @dev This contract extends an ERC20 token with a snapshot mechanism. When a snapshot is created, the balances and
 * total supply at the time are recorded for later access.
 *
 * This can be used to safely create mechanisms based on token balances such as trustless dividends or weighted voting.
 * In naive implementations it's possible to perform a "double spend" attack by reusing the same balance from different
 * accounts. By using snapshots to calculate dividends or voting power, those attacks no longer apply. It can also be
 * used to create an efficient ERC20 forking mechanism.
 *
 * Snapshots are created by the internal {_snapshot} function, which will emit the {Snapshot} event and return a
 * snapshot id. To get the total supply at the time of a snapshot, call the function {totalSupplyAt} with the snapshot
 * id. To get the balance of an account at the time of a snapshot, call the {balanceOfAt} function with the snapshot id
 * and the account address.
 *
 * NOTE: Snapshot policy can be customized by overriding the {_getCurrentSnapshotId} method. For example, having it
 * return `block.number` will trigger the creation of snapshot at the beginning of each new block. When overriding this
 * function, be careful about the monotonicity of its result. Non-monotonic snapshot ids will break the contract.
 *
 * Implementing snapshots for every block using this method will incur significant gas costs. For a gas-efficient
 * alternative consider {ERC20Votes}.
 *
 * ==== Gas Costs
 *
 * Snapshots are efficient. Snapshot creation is _O(1)_. Retrieval of balances or total supply from a snapshot is _O(log
 * n)_ in the number of snapshots that have been created, although _n_ for a specific account will generally be much
 * smaller since identical balances in subsequent snapshots are stored as a single entry.
 *
 * There is a constant overhead for normal ERC20 transfers due to the additional snapshot bookkeeping. This overhead is
 * only significant for the first transfer that immediately follows a snapshot for a particular account. Subsequent
 * transfers will have normal cost until the next snapshot, and so on.
 */

abstract contract ERC20Snapshot is ERC20 {
    // Inspired by Jordi Baylina's MiniMeToken to record historical balances:
    // https://github.com/Giveth/minime/blob/ea04d950eea153a04c51fa510b068b9dded390cb/contracts/MiniMeToken.sol

    using Arrays for uint256[];
    using Counters for Counters.Counter;

    // Snapshotted values have arrays of ids and the value corresponding to that id. These could be an array of a
    // Snapshot struct, but that would impede usage of functions that work on an array.
    struct Snapshots {
        uint256[] ids;
        uint256[] values;
    }

    mapping(address => Snapshots) private _accountBalanceSnapshots;
    Snapshots private _totalSupplySnapshots;

    // Snapshot ids increase monotonically, with the first value being 1. An id of 0 is invalid.
    Counters.Counter private _currentSnapshotId;

    /**
     * @dev Emitted by {_snapshot} when a snapshot identified by `id` is created.
     */
    event Snapshot(uint256 id);

    /**
     * @dev Creates a new snapshot and returns its snapshot id.
     *
     * Emits a {Snapshot} event that contains the same id.
     *
     * {_snapshot} is `internal` and you have to decide how to expose it externally. Its usage may be restricted to a
     * set of accounts, for example using {AccessControl}, or it may be open to the public.
     *
     * [WARNING]
     * ====
     * While an open way of calling {_snapshot} is required for certain trust minimization mechanisms such as forking,
     * you must consider that it can potentially be used by attackers in two ways.
     *
     * First, it can be used to increase the cost of retrieval of values from snapshots, although it will grow
     * logarithmically thus rendering this attack ineffective in the long term. Second, it can be used to target
     * specific accounts and increase the cost of ERC20 transfers for them, in the ways specified in the Gas Costs
     * section above.
     *
     * We haven't measured the actual numbers; if this is something you're interested in please reach out to us.
     * ====
     */
    function _snapshot() internal virtual returns (uint256) {
        _currentSnapshotId.increment();

        uint256 currentId = _getCurrentSnapshotId();
        emit Snapshot(currentId);
        return currentId;
    }

    /**
     * @dev Get the current snapshotId
     */
    function _getCurrentSnapshotId() internal view virtual returns (uint256) {
        return _currentSnapshotId.current();
    }

    /**
     * @dev Retrieves the balance of `account` at the time `snapshotId` was created.
     */
    function balanceOfAt(address account, uint256 snapshotId) public view virtual returns (uint256) {
        (bool snapshotted, uint256 value) = _valueAt(snapshotId, _accountBalanceSnapshots[account]);

        return snapshotted ? value : balanceOf(account);
    }

    /**
     * @dev Retrieves the total supply at the time `snapshotId` was created.
     */
    function totalSupplyAt(uint256 snapshotId) public view virtual returns (uint256) {
        (bool snapshotted, uint256 value) = _valueAt(snapshotId, _totalSupplySnapshots);

        return snapshotted ? value : totalSupply();
    }

    // Update balance and/or total supply snapshots before the values are modified. This is implemented
    // in the _beforeTokenTransfer hook, which is executed for _mint, _burn, and _transfer operations.
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual override {
        super._beforeTokenTransfer(from, to, amount);

        if (from == address(0)) {
            // mint
            _updateAccountSnapshot(to);
            _updateTotalSupplySnapshot();
        } else if (to == address(0)) {
            // burn
            _updateAccountSnapshot(from);
            _updateTotalSupplySnapshot();
        } else {
            // transfer
            _updateAccountSnapshot(from);
            _updateAccountSnapshot(to);
        }
    }

    function _valueAt(uint256 snapshotId, Snapshots storage snapshots) private view returns (bool, uint256) {
        require(snapshotId > 0, "ERC20Snapshot: id is 0");
        require(snapshotId <= _getCurrentSnapshotId(), "ERC20Snapshot: nonexistent id");

        // When a valid snapshot is queried, there are three possibilities:
        //  a) The queried value was not modified after the snapshot was taken. Therefore, a snapshot entry was never
        //  created for this id, and all stored snapshot ids are smaller than the requested one. The value that corresponds
        //  to this id is the current one.
        //  b) The queried value was modified after the snapshot was taken. Therefore, there will be an entry with the
        //  requested id, and its value is the one to return.
        //  c) More snapshots were created after the requested one, and the queried value was later modified. There will be
        //  no entry for the requested id: the value that corresponds to it is that of the smallest snapshot id that is
        //  larger than the requested one.
        //
        // In summary, we need to find an element in an array, returning the index of the smallest value that is larger if
        // it is not found, unless said value doesn't exist (e.g. when all values are smaller). Arrays.findUpperBound does
        // exactly this.

        uint256 index = snapshots.ids.findUpperBound(snapshotId);

        if (index == snapshots.ids.length) {
            return (false, 0);
        } else {
            return (true, snapshots.values[index]);
        }
    }

    function _updateAccountSnapshot(address account) private {
        _updateSnapshot(_accountBalanceSnapshots[account], balanceOf(account));
    }

    function _updateTotalSupplySnapshot() private {
        _updateSnapshot(_totalSupplySnapshots, totalSupply());
    }

    function _updateSnapshot(Snapshots storage snapshots, uint256 currentValue) private {
        uint256 currentId = _getCurrentSnapshotId();
        if (_lastSnapshotId(snapshots.ids) < currentId) {
            snapshots.ids.push(currentId);
            snapshots.values.push(currentValue);
        }
    }

    function _lastSnapshotId(uint256[] storage ids) private view returns (uint256) {
        if (ids.length == 0) {
            return 0;
        } else {
            return ids[ids.length - 1];
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol)

pragma solidity ^0.8.0;

import "../ERC20.sol";
import "../../../utils/Context.sol";

/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        _spendAllowance(account, _msgSender(), amount);
        _burn(account, amount);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/EIP712.sol)

pragma solidity ^0.8.0;

import "./ECDSA.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].
 *
 * _Available since v3.4._
 */
abstract contract EIP712 {
    /* solhint-disable var-name-mixedcase */
    // 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 _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;
    address private immutable _CACHED_THIS;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /* solhint-enable var-name-mixedcase */

    /**
     * @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) {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _CACHED_THIS = address(this);
        _TYPE_HASH = typeHash;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @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) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (governance/utils/IVotes.sol)
pragma solidity ^0.8.0;

/**
 * @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts.
 *
 * _Available since v4.5._
 */
interface IVotes {
    /**
     * @dev Emitted when an account changes their delegate.
     */
    event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);

    /**
     * @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes.
     */
    event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);

    /**
     * @dev Returns the current amount of votes that `account` has.
     */
    function getVotes(address account) external view returns (uint256);

    /**
     * @dev Returns the amount of votes that `account` had at the end of a past block (`blockNumber`).
     */
    function getPastVotes(address account, uint256 blockNumber) external view returns (uint256);

    /**
     * @dev Returns the total supply of votes available at the end of a past block (`blockNumber`).
     *
     * NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.
     * Votes that have not been delegated are still part of total supply, even though they would not participate in a
     * vote.
     */
    function getPastTotalSupply(uint256 blockNumber) external view returns (uint256);

    /**
     * @dev Returns the delegate that `account` has chosen.
     */
    function delegates(address account) external view returns (address);

    /**
     * @dev Delegates votes from the sender to `delegatee`.
     */
    function delegate(address delegatee) external;

    /**
     * @dev Delegates votes from signer to `delegatee`.
     */
    function delegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 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 10, 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 * 8) < value ? 1 : 0);
        }
    }
}

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

pragma solidity ^0.8.0;

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

/**
 * @dev Collection of functions related to array types.
 */
library Arrays {
    using StorageSlot for bytes32;

    /**
     * @dev Searches a sorted `array` and returns the first index that contains
     * a value greater or equal to `element`. If no such index exists (i.e. all
     * values in the array are strictly less than `element`), the array length is
     * returned. Time complexity O(log n).
     *
     * `array` is expected to be sorted in ascending order, and to contain no
     * repeated elements.
     */
    function findUpperBound(uint256[] storage array, uint256 element) internal view returns (uint256) {
        if (array.length == 0) {
            return 0;
        }

        uint256 low = 0;
        uint256 high = array.length;

        while (low < high) {
            uint256 mid = Math.average(low, high);

            // Note that mid will always be strictly less than high (i.e. it will be a valid array index)
            // because Math.average rounds down (it does integer division with truncation).
            if (unsafeAccess(array, mid).value > element) {
                high = mid;
            } else {
                low = mid + 1;
            }
        }

        // At this point `low` is the exclusive upper bound. We will return the inclusive upper bound.
        if (low > 0 && unsafeAccess(array, low - 1).value == element) {
            return low - 1;
        } else {
            return low;
        }
    }

    /**
     * @dev Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check.
     *
     * WARNING: Only use if you are certain `pos` is lower than the array length.
     */
    function unsafeAccess(address[] storage arr, uint256 pos) internal pure returns (StorageSlot.AddressSlot storage) {
        bytes32 slot;
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0, arr.slot)
            slot := add(keccak256(0, 0x20), pos)
        }
        return slot.getAddressSlot();
    }

    /**
     * @dev Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check.
     *
     * WARNING: Only use if you are certain `pos` is lower than the array length.
     */
    function unsafeAccess(bytes32[] storage arr, uint256 pos) internal pure returns (StorageSlot.Bytes32Slot storage) {
        bytes32 slot;
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0, arr.slot)
            slot := add(keccak256(0, 0x20), pos)
        }
        return slot.getBytes32Slot();
    }

    /**
     * @dev Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check.
     *
     * WARNING: Only use if you are certain `pos` is lower than the array length.
     */
    function unsafeAccess(uint256[] storage arr, uint256 pos) internal pure returns (StorageSlot.Uint256Slot storage) {
        bytes32 slot;
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0, arr.slot)
            slot := add(keccak256(0, 0x20), pos)
        }
        return slot.getUint256Slot();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC3156FlashLender.sol)

pragma solidity ^0.8.0;

import "./IERC3156FlashBorrower.sol";

/**
 * @dev Interface of the ERC3156 FlashLender, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 *
 * _Available since v4.1._
 */
interface IERC3156FlashLender {
    /**
     * @dev The amount of currency available to be lended.
     * @param token The loan currency.
     * @return The amount of `token` that can be borrowed.
     */
    function maxFlashLoan(address token) external view returns (uint256);

    /**
     * @dev The fee to be charged for a given loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @return The amount of `token` to be charged for the loan, on top of the returned principal.
     */
    function flashFee(address token, uint256 amount) external view returns (uint256);

    /**
     * @dev Initiate a flash loan.
     * @param receiver The receiver of the tokens in the loan, and the receiver of the callback.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     */
    function flashLoan(
        IERC3156FlashBorrower receiver,
        address token,
        uint256 amount,
        bytes calldata data
    ) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (interfaces/IERC3156FlashBorrower.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC3156 FlashBorrower, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 *
 * _Available since v4.1._
 */
interface IERC3156FlashBorrower {
    /**
     * @dev Receive a flash loan.
     * @param initiator The initiator of the loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param fee The additional amount of tokens to repay.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     * @return The keccak256 hash of "IERC3156FlashBorrower.onFlashLoan"
     */
    function onFlashLoan(
        address initiator,
        address token,
        uint256 amount,
        uint256 fee,
        bytes calldata data
    ) external returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts 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 v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./math/Math.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 `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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)

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:
 * ```
 * 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`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 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
        }
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"address","name":"fromDelegate","type":"address"},{"indexed":true,"internalType":"address","name":"toDelegate","type":"address"}],"name":"DelegateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegate","type":"address"},{"indexed":false,"internalType":"uint256","name":"previousBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newBalance","type":"uint256"}],"name":"DelegateVotesChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"}],"name":"Snapshot","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"snapshotId","type":"uint256"}],"name":"balanceOfAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint32","name":"pos","type":"uint32"}],"name":"checkpoints","outputs":[{"components":[{"internalType":"uint32","name":"fromBlock","type":"uint32"},{"internalType":"uint224","name":"votes","type":"uint224"}],"internalType":"struct ERC20Votes.Checkpoint","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"delegatee","type":"address"}],"name":"delegate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"delegatee","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"delegateBySig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"delegates","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"flashFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC3156FlashBorrower","name":"receiver","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"flashLoan","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getPastTotalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getPastVotes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getVotes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"maxFlashLoan","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"numCheckpoints","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"snapshot","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"snapshotId","type":"uint256"}],"name":"totalSupplyAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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