// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.17;

// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)

// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

/**
 * @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);
}

// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.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);
}

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

/**
 * @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;
    }
}

/**
 * @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].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * 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}.
     *
     * 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 default value returned by this function, unless
     * it's 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 {}
}

// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

/**
 * @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);
}

// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

interface IConicPoolWeightManagement {
    struct PoolWeight {
        address poolAddress;
        uint256 weight;
    }

    function addPool(address pool) external;

    function removePool(address pool) external;

    function updateWeights(PoolWeight[] memory poolWeights) external;

    function handleDepeggedCurvePool(address curvePool_) external;

    function handleInvalidConvexPid(address pool) external returns (uint256);

    function allPools() external view returns (address[] memory);

    function poolsCount() external view returns (uint256);

    function getPoolAtIndex(uint256 _index) external view returns (address);

    function getWeight(address curvePool) external view returns (uint256);

    function getWeights() external view returns (PoolWeight[] memory);

    function isRegisteredPool(address _pool) external view returns (bool);
}

interface ILpToken is IERC20Metadata {
    function minter() external view returns (address);

    function mint(address account, uint256 amount, address ubo) external returns (uint256);

    function burn(address _owner, uint256 _amount, address ubo) external returns (uint256);

    function taint(address from, address to, uint256 amount) external;
}

interface IRewardManager {
    event ClaimedRewards(uint256 claimedCrv, uint256 claimedCvx);
    event SoldRewardTokens(uint256 targetTokenReceived);
    event ExtraRewardAdded(address reward);
    event ExtraRewardRemoved(address reward);
    event ExtraRewardsCurvePoolSet(address extraReward, address curvePool);
    event FeesSet(uint256 feePercentage);
    event FeesEnabled(uint256 feePercentage);
    event EarningsClaimed(
        address indexed claimedBy,
        uint256 cncEarned,
        uint256 crvEarned,
        uint256 cvxEarned
    );

    function accountCheckpoint(address account) external;

    function poolCheckpoint() external returns (bool);

    function addExtraReward(address reward) external returns (bool);

    function addBatchExtraRewards(address[] memory rewards) external;

    function conicPool() external view returns (address);

    function setFeePercentage(uint256 _feePercentage) external;

    function claimableRewards(
        address account
    ) external view returns (uint256 cncRewards, uint256 crvRewards, uint256 cvxRewards);

    function claimEarnings() external returns (uint256, uint256, uint256);

    function claimPoolEarningsAndSellRewardTokens() external;

    function feePercentage() external view returns (uint256);

    function feesEnabled() external view returns (bool);
}

interface IOracle {
    event TokenUpdated(address indexed token, address feed, uint256 maxDelay, bool isEthPrice);

    /// @notice returns the price in USD of symbol.
    function getUSDPrice(address token) external view returns (uint256);

    /// @notice returns if the given token is supported for pricing.
    function isTokenSupported(address token) external view returns (bool);
}

// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.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. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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);
    }
}

interface IPausable {
    event Paused(uint256 pausedUntil);
    event PauseDurationSet(uint256 pauseDuration);

    function controller() external view returns (IController);

    function pausedUntil() external view returns (uint256);

    function pauseDuration() external view returns (uint256);

    function isPaused() external view returns (bool);

    function setPauseDuration(uint256 _pauseDuration) external;

    function pause() external;
}

interface IConicPool is IConicPoolWeightManagement, IPausable {
    event Deposit(
        address indexed sender,
        address indexed receiver,
        uint256 depositedAmount,
        uint256 lpReceived
    );
    event Withdraw(address indexed account, uint256 amount);
    event NewWeight(address indexed curvePool, uint256 newWeight);
    event NewMaxIdleCurveLpRatio(uint256 newRatio);
    event ClaimedRewards(uint256 claimedCrv, uint256 claimedCvx);
    event HandledDepeggedCurvePool(address curvePool_);
    event HandledInvalidConvexPid(address curvePool_, uint256 pid_);
    event CurvePoolAdded(address curvePool_);
    event CurvePoolRemoved(address curvePool_);
    event Shutdown();
    event DepegThresholdUpdated(uint256 newThreshold);
    event MaxDeviationUpdated(uint256 newMaxDeviation);
    event RebalancingRewardsEnabledSet(bool enabled);
    event EmergencyRebalancingRewardFactorUpdated(uint256 factor);

    struct PoolWithAmount {
        address poolAddress;
        uint256 amount;
    }

    function underlying() external view returns (IERC20Metadata);

    function lpToken() external view returns (ILpToken);

    function rewardManager() external view returns (IRewardManager);

    function depegThreshold() external view returns (uint256);

    function maxIdleCurveLpRatio() external view returns (uint256);

    function setMaxIdleCurveLpRatio(uint256 value) external;

    function setMaxDeviation(uint256 maxDeviation_) external;

    function updateDepegThreshold(uint256 value) external;

    function depositFor(
        address _account,
        uint256 _amount,
        uint256 _minLpReceived,
        bool stake
    ) external returns (uint256);

    function deposit(uint256 _amount, uint256 _minLpReceived) external returns (uint256);

    function deposit(
        uint256 _amount,
        uint256 _minLpReceived,
        bool stake
    ) external returns (uint256);

    function exchangeRate() external view returns (uint256);

    function usdExchangeRate() external view returns (uint256);

    function unstakeAndWithdraw(uint256 _amount, uint256 _minAmount) external returns (uint256);

    function unstakeAndWithdraw(
        uint256 _amount,
        uint256 _minAmount,
        address _to
    ) external returns (uint256);

    function withdraw(uint256 _amount, uint256 _minAmount) external returns (uint256);

    function withdraw(uint256 _amount, uint256 _minAmount, address _to) external returns (uint256);

    function getAllocatedUnderlying() external view returns (PoolWithAmount[] memory);

    function rebalancingRewardActive() external view returns (bool);

    function totalDeviationAfterWeightUpdate() external view returns (uint256);

    function computeTotalDeviation() external view returns (uint256);

    /// @notice returns the total amount of funds held by this pool in terms of underlying
    function totalUnderlying() external view returns (uint256);

    function getTotalAndPerPoolUnderlying()
        external
        view
        returns (
            uint256 totalUnderlying_,
            uint256 totalAllocated_,
            uint256[] memory perPoolUnderlying_
        );

    /// @notice same as `totalUnderlying` but returns a cached version
    /// that might be slightly outdated if oracle prices have changed
    /// @dev this is useful in cases where we want to reduce gas usage and do
    /// not need a precise value
    function cachedTotalUnderlying() external view returns (uint256);

    function updateRewardSpendingApproval(address token, bool approved) external;

    function shutdownPool() external;

    function isShutdown() external view returns (bool);

    function isBalanced() external view returns (bool);

    function rebalancingRewardsEnabled() external view returns (bool);

    function setRebalancingRewardsEnabled(bool enabled) external;

    function getAllUnderlyingCoins() external view returns (address[] memory result);

    function rebalancingRewardsFactor() external view returns (uint256);

    function rebalancingRewardsActivatedAt() external view returns (uint64);

    function getWeights() external view returns (PoolWeight[] memory);

    function runSanityChecks() external;
}

interface IGenericOracle is IOracle {
    /// @notice returns the oracle to be used to price `token`
    function getOracle(address token) external view returns (IOracle);

    /// @notice converts the price of an LP token to the given underlying
    function curveLpToUnderlying(
        address curveLpToken,
        address underlying,
        uint256 curveLpAmount
    ) external view returns (uint256);

    /// @notice same as above but avoids fetching the underlying price again
    function curveLpToUnderlying(
        address curveLpToken,
        address underlying,
        uint256 curveLpAmount,
        uint256 underlyingPrice
    ) external view returns (uint256);

    /// @notice converts the price an underlying asset to a given Curve LP token
    function underlyingToCurveLp(
        address underlying,
        address curveLpToken,
        uint256 underlyingAmount
    ) external view returns (uint256);
}

interface IInflationManager {
    event TokensClaimed(address indexed pool, uint256 cncAmount);
    event RebalancingRewardHandlerAdded(address indexed pool, address indexed handler);
    event RebalancingRewardHandlerRemoved(address indexed pool, address indexed handler);
    event PoolWeightsUpdated();

    function executeInflationRateUpdate() external;

    function updatePoolWeights() external;

    /// @notice returns the weights of the Conic pools to know how much inflation
    /// each of them will receive, as well as the total amount of USD value in all the pools
    function computePoolWeights()
        external
        view
        returns (address[] memory _pools, uint256[] memory poolWeights, uint256 totalUSDValue);

    function computePoolWeight(
        address pool
    ) external view returns (uint256 poolWeight, uint256 totalUSDValue);

    function currentInflationRate() external view returns (uint256);

    function getCurrentPoolInflationRate(address pool) external view returns (uint256);

    function handleRebalancingRewards(
        address account,
        uint256 deviationBefore,
        uint256 deviationAfter
    ) external;

    function addPoolRebalancingRewardHandler(
        address poolAddress,
        address rebalancingRewardHandler
    ) external;

    function removePoolRebalancingRewardHandler(
        address poolAddress,
        address rebalancingRewardHandler
    ) external;

    function rebalancingRewardHandlers(
        address poolAddress
    ) external view returns (address[] memory);

    function hasPoolRebalancingRewardHandler(
        address poolAddress,
        address handler
    ) external view returns (bool);
}

interface ILpTokenStaker {
    event LpTokenStaked(address indexed account, uint256 amount);
    event LpTokenUnstaked(address indexed account, uint256 amount);
    event TokensClaimed(address indexed pool, uint256 cncAmount);
    event Shutdown();

    function stake(uint256 amount, address conicPool) external;

    function unstake(uint256 amount, address conicPool) external;

    function stakeFor(uint256 amount, address conicPool, address account) external;

    function unstakeFor(uint256 amount, address conicPool, address account) external;

    function unstakeFrom(uint256 amount, address account) external;

    function getUserBalanceForPool(
        address conicPool,
        address account
    ) external view returns (uint256);

    function getBalanceForPool(address conicPool) external view returns (uint256);

    function updateBoost(address user) external;

    function claimCNCRewardsForPool(address pool) external;

    function claimableCnc(address pool) external view returns (uint256);

    function checkpoint(address pool) external returns (uint256);

    function shutdown() external;

    function getBoost(address user) external view returns (uint256);

    function isShutdown() external view returns (bool);
}

interface IBonding {
    event CncStartPriceSet(uint256 startPrice);
    event PriceIncreaseFactorSet(uint256 factor);
    event MinBondingAmountSet(uint256 amount);
    event Bonded(
        address indexed account,
        address indexed recipient,
        uint256 lpTokenAmount,
        uint256 cncReceived,
        uint256 lockTime
    );
    event DebtPoolSet(address indexed pool);
    event DebtPoolFeesClaimed(uint256 crvAmount, uint256 cvxAmount, uint256 cncAmount);
    event StreamClaimed(address indexed account, uint256 amount);
    event BondingStarted(uint256 amount, uint256 epochs);
    event RemainingCNCRecovered(uint256 amount);

    function startBonding() external;

    function setCncStartPrice(uint256 _cncStartPrice) external;

    function setCncPriceIncreaseFactor(uint256 _priceIncreaseFactor) external;

    function setMinBondingAmount(uint256 _minBondingAmount) external;

    function setDebtPool(address _debtPool) external;

    function bondCncCrvUsd(
        uint256 lpTokenAmount,
        uint256 minCncReceived,
        uint64 cncLockTime
    ) external returns (uint256);

    function recoverRemainingCNC() external;

    function claimStream() external;

    function claimFeesForDebtPool() external;

    function streamCheckpoint() external;

    function accountCheckpoint(address account) external;

    function computeCurrentCncBondPrice() external view returns (uint256);

    function cncAvailable() external view returns (uint256);

    function cncBondPrice() external view returns (uint256);

    function bondCncCrvUsdFor(
        uint256 lpTokenAmount,
        uint256 minCncReceived,
        uint64 cncLockTime,
        address recipient
    ) external returns (uint256);
}

interface IPoolAdapter {
    /// @notice This is to set which LP token price the value computation should use
    /// `Latest` uses a freshly computed price
    /// `Cached` uses the price in cache
    /// `Minimum` uses the minimum of these two
    enum PriceMode {
        Latest,
        Cached,
        Minimum
    }

    /// @notice Deposit `underlyingAmount` of `underlying` into `pool`
    /// @dev This function should be written with the assumption that it will be delegate-called into
    function deposit(address pool, address underlying, uint256 underlyingAmount) external;

    /// @notice Withdraw `underlyingAmount` of `underlying` from `pool`
    /// @dev This function should be written with the assumption that it will be delegate-called into
    function withdraw(address pool, address underlying, uint256 underlyingAmount) external;

    /// @notice Returns the amount of of assets that `conicPool` holds in `pool`, in terms of USD
    function computePoolValueInUSD(
        address conicPool,
        address pool
    ) external view returns (uint256 usdAmount);

    /// @notice Updates the price caches of the given pools
    function updatePriceCache(address pool) external;

    /// @notice Returns the amount of of assets that `conicPool` holds in `pool`, in terms of USD
    /// using the given price mode
    function computePoolValueInUSD(
        address conicPool,
        address pool,
        PriceMode priceMode
    ) external view returns (uint256 usdAmount);

    /// @notice Returns the amount of of assets that `conicPool` holds in `pool`, in terms of underlying
    function computePoolValueInUnderlying(
        address conicPool,
        address pool,
        address underlying,
        uint256 underlyingPrice
    ) external view returns (uint256 underlyingAmount);

    /// @notice Returns the amount of of assets that `conicPool` holds in `pool`, in terms of underlying
    /// using the given price mode
    function computePoolValueInUnderlying(
        address conicPool,
        address pool,
        address underlying,
        uint256 underlyingPrice,
        PriceMode priceMode
    ) external view returns (uint256 underlyingAmount);

    /// @notice Claim earnings of `conicPool` from `pool`
    function claimEarnings(address conicPool, address pool) external;

    /// @notice Returns the LP token of a given `pool`
    function lpToken(address pool) external view returns (address);

    /// @notice Returns true if `pool` supports `asset`
    function supportsAsset(address pool, address asset) external view returns (bool);

    /// @notice Returns the amount of CRV earned by `pool` on Convex
    function getCRVEarnedOnConvex(
        address account,
        address curvePool
    ) external view returns (uint256);

    /// @notice Executes a sanity check, e.g. checking for reentrancy
    function executeSanityCheck(address pool) external;

    /// @notice returns all the underlying coins of the pool
    function getAllUnderlyingCoins(address pool) external view returns (address[] memory);
}

interface IFeeRecipient {
    event FeesReceived(address indexed sender, uint256 crvAmount, uint256 cvxAmount);

    function receiveFees(uint256 amountCrv, uint256 amountCvx) external;
}

interface IBooster {
    function poolInfo(
        uint256 pid
    )
        external
        view
        returns (
            address lpToken,
            address token,
            address gauge,
            address crvRewards,
            address stash,
            bool shutdown
        );

    function poolLength() external view returns (uint256);

    function deposit(uint256 _pid, uint256 _amount, bool _stake) external returns (bool);

    function withdraw(uint256 _pid, uint256 _amount) external returns (bool);

    function withdrawAll(uint256 _pid) external returns (bool);

    function depositAll(uint256 _pid, bool _stake) external returns (bool);

    function earmarkRewards(uint256 _pid) external returns (bool);

    function isShutdown() external view returns (bool);
}

interface ICurvePoolV2 {
    function token() external view returns (address);

    function coins(uint256 i) external view returns (address);

    function factory() external view returns (address);

    function exchange(
        uint256 i,
        uint256 j,
        uint256 dx,
        uint256 min_dy,
        bool use_eth,
        address receiver
    ) external returns (uint256);

    function exchange_underlying(
        uint256 i,
        uint256 j,
        uint256 dx,
        uint256 min_dy,
        address receiver
    ) external returns (uint256);

    function add_liquidity(
        uint256[2] memory amounts,
        uint256 min_mint_amount,
        bool use_eth,
        address receiver
    ) external returns (uint256);

    function add_liquidity(
        uint256[2] memory amounts,
        uint256 min_mint_amount
    ) external returns (uint256);

    function add_liquidity(
        uint256[3] memory amounts,
        uint256 min_mint_amount,
        bool use_eth,
        address receiver
    ) external returns (uint256);

    function add_liquidity(
        uint256[3] memory amounts,
        uint256 min_mint_amount
    ) external returns (uint256);

    function remove_liquidity(
        uint256 _amount,
        uint256[2] memory min_amounts,
        bool use_eth,
        address receiver
    ) external;

    function remove_liquidity(uint256 _amount, uint256[2] memory min_amounts) external;

    function remove_liquidity(
        uint256 _amount,
        uint256[3] memory min_amounts,
        bool use_eth,
        address receiver
    ) external;

    function remove_liquidity(uint256 _amount, uint256[3] memory min_amounts) external;

    function remove_liquidity_one_coin(
        uint256 token_amount,
        uint256 i,
        uint256 min_amount,
        bool use_eth,
        address receiver
    ) external returns (uint256);

    function get_dy(uint256 i, uint256 j, uint256 dx) external view returns (uint256);

    function calc_token_amount(uint256[] memory amounts) external view returns (uint256);

    function calc_withdraw_one_coin(
        uint256 token_amount,
        uint256 i
    ) external view returns (uint256);

    function get_virtual_price() external view returns (uint256);
}

interface ICurvePoolV1 {
    function get_virtual_price() external view returns (uint256);

    function add_liquidity(uint256[8] calldata amounts, uint256 min_mint_amount) external;

    function add_liquidity(uint256[7] calldata amounts, uint256 min_mint_amount) external;

    function add_liquidity(uint256[6] calldata amounts, uint256 min_mint_amount) external;

    function add_liquidity(uint256[5] calldata amounts, uint256 min_mint_amount) external;

    function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount) external;

    function add_liquidity(uint256[3] calldata amounts, uint256 min_mint_amount) external;

    function add_liquidity(uint256[2] calldata amounts, uint256 min_mint_amount) external;

    function remove_liquidity_imbalance(
        uint256[4] calldata amounts,
        uint256 max_burn_amount
    ) external;

    function remove_liquidity_imbalance(
        uint256[3] calldata amounts,
        uint256 max_burn_amount
    ) external;

    function remove_liquidity_imbalance(
        uint256[2] calldata amounts,
        uint256 max_burn_amount
    ) external;

    function lp_token() external view returns (address);

    function A_PRECISION() external view returns (uint256);

    function A_precise() external view returns (uint256);

    function remove_liquidity(uint256 _amount, uint256[3] calldata min_amounts) external;

    function exchange(
        int128 from,
        int128 to,
        uint256 _from_amount,
        uint256 _min_to_amount
    ) external;

    function coins(uint256 i) external view returns (address);

    function balances(uint256 i) external view returns (uint256);

    function get_dy(int128 i, int128 j, uint256 _dx) external view returns (uint256);

    function calc_token_amount(
        uint256[4] calldata amounts,
        bool deposit
    ) external view returns (uint256);

    function calc_token_amount(
        uint256[3] calldata amounts,
        bool deposit
    ) external view returns (uint256);

    function calc_token_amount(
        uint256[2] calldata amounts,
        bool deposit
    ) external view returns (uint256);

    function calc_withdraw_one_coin(
        uint256 _token_amount,
        int128 i
    ) external view returns (uint256);

    function remove_liquidity_one_coin(
        uint256 _token_amount,
        int128 i,
        uint256 min_amount
    ) external;

    function fee() external view returns (uint256);
}

library ScaledMath {
    uint256 internal constant DECIMALS = 18;
    uint256 internal constant ONE = 10 ** DECIMALS;

    function mulDown(uint256 a, uint256 b) internal pure returns (uint256) {
        return (a * b) / ONE;
    }

    function mulDown(uint256 a, uint256 b, uint256 decimals) internal pure returns (uint256) {
        return (a * b) / (10 ** decimals);
    }

    function divDown(uint256 a, uint256 b) internal pure returns (uint256) {
        return (a * ONE) / b;
    }

    function divDown(uint256 a, uint256 b, uint256 decimals) internal pure returns (uint256) {
        return (a * 10 ** decimals) / b;
    }

    function divUp(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        return ((a * ONE) - 1) / b + 1;
    }

    function mulDown(int256 a, int256 b) internal pure returns (int256) {
        return (a * b) / int256(ONE);
    }

    function mulDownUint128(uint128 a, uint128 b) internal pure returns (uint128) {
        return (a * b) / uint128(ONE);
    }

    function mulDown(int256 a, int256 b, uint256 decimals) internal pure returns (int256) {
        return (a * b) / int256(10 ** decimals);
    }

    function divDown(int256 a, int256 b) internal pure returns (int256) {
        return (a * int256(ONE)) / b;
    }

    function divDownUint128(uint128 a, uint128 b) internal pure returns (uint128) {
        return (a * uint128(ONE)) / b;
    }

    function divDown(int256 a, int256 b, uint256 decimals) internal pure returns (int256) {
        return (a * int256(10 ** decimals)) / b;
    }

    function convertScale(
        uint256 a,
        uint8 fromDecimals,
        uint8 toDecimals
    ) internal pure returns (uint256) {
        if (fromDecimals == toDecimals) return a;
        if (fromDecimals > toDecimals) return downscale(a, fromDecimals, toDecimals);
        return upscale(a, fromDecimals, toDecimals);
    }

    function convertScale(
        int256 a,
        uint8 fromDecimals,
        uint8 toDecimals
    ) internal pure returns (int256) {
        if (fromDecimals == toDecimals) return a;
        if (fromDecimals > toDecimals) return downscale(a, fromDecimals, toDecimals);
        return upscale(a, fromDecimals, toDecimals);
    }

    function upscale(
        uint256 a,
        uint8 fromDecimals,
        uint8 toDecimals
    ) internal pure returns (uint256) {
        return a * (10 ** (toDecimals - fromDecimals));
    }

    function downscale(
        uint256 a,
        uint8 fromDecimals,
        uint8 toDecimals
    ) internal pure returns (uint256) {
        return a / (10 ** (fromDecimals - toDecimals));
    }

    function upscale(
        int256 a,
        uint8 fromDecimals,
        uint8 toDecimals
    ) internal pure returns (int256) {
        return a * int256(10 ** (toDecimals - fromDecimals));
    }

    function downscale(
        int256 a,
        uint8 fromDecimals,
        uint8 toDecimals
    ) internal pure returns (int256) {
        return a / int256(10 ** (fromDecimals - toDecimals));
    }

    function intPow(uint256 a, uint256 n) internal pure returns (uint256) {
        uint256 result = ONE;
        for (uint256 i; i < n; ) {
            result = mulDown(result, a);
            unchecked {
                ++i;
            }
        }
        return result;
    }

    function absSub(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            return a >= b ? a - b : b - a;
        }
    }

    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a <= b ? a : b;
    }
}

library CurvePoolUtils {
    using ScaledMath for uint256;

    error NotWithinThreshold(address pool, uint256 assetA, uint256 assetB);

    /// @dev by default, allow for 30 bps deviation regardless of pool fees
    uint256 internal constant _DEFAULT_IMBALANCE_BUFFER = 30e14;

    /// @dev Curve scales the `fee` by 1e10
    uint8 internal constant _CURVE_POOL_FEE_DECIMALS = 10;

    /// @dev allow imbalance to be buffer + 3x the fee, e.g. if fee is 3.6 bps and buffer is 30 bps, allow 40.8 bps
    uint256 internal constant _FEE_IMBALANCE_MULTIPLIER = 3;

    enum AssetType {
        USD,
        ETH,
        BTC,
        OTHER,
        CRYPTO
    }

    struct PoolMeta {
        address pool;
        uint256 numberOfCoins;
        AssetType assetType;
        uint256[] decimals;
        uint256[] prices;
        uint256[] imbalanceBuffers;
    }

    function ensurePoolBalanced(PoolMeta memory poolMeta) internal view {
        uint256 poolFee = ICurvePoolV1(poolMeta.pool).fee().convertScale(
            _CURVE_POOL_FEE_DECIMALS,
            18
        );

        for (uint256 i = 0; i < poolMeta.numberOfCoins - 1; i++) {
            uint256 fromDecimals = poolMeta.decimals[i];
            uint256 fromBalance = 10 ** fromDecimals;
            uint256 fromPrice = poolMeta.prices[i];

            for (uint256 j = i + 1; j < poolMeta.numberOfCoins; j++) {
                uint256 toDecimals = poolMeta.decimals[j];
                uint256 toPrice = poolMeta.prices[j];
                uint256 toExpectedUnscaled = (fromBalance * fromPrice) / toPrice;
                uint256 toExpected = toExpectedUnscaled.convertScale(
                    uint8(fromDecimals),
                    uint8(toDecimals)
                );

                uint256 toActual;

                if (poolMeta.assetType == AssetType.CRYPTO) {
                    // Handling crypto pools
                    toActual = ICurvePoolV2(poolMeta.pool).get_dy(i, j, fromBalance);
                } else {
                    // Handling other pools
                    toActual = ICurvePoolV1(poolMeta.pool).get_dy(
                        int128(uint128(i)),
                        int128(uint128(j)),
                        fromBalance
                    );
                }
                uint256 _maxImbalanceBuffer = poolMeta.imbalanceBuffers[i].max(
                    poolMeta.imbalanceBuffers[j]
                );

                if (!_isWithinThreshold(toExpected, toActual, poolFee, _maxImbalanceBuffer))
                    revert NotWithinThreshold(poolMeta.pool, i, j);
            }
        }
    }

    function _isWithinThreshold(
        uint256 a,
        uint256 b,
        uint256 poolFee,
        uint256 imbalanceBuffer
    ) internal pure returns (bool) {
        if (imbalanceBuffer == 0) imbalanceBuffer = _DEFAULT_IMBALANCE_BUFFER;
        uint256 imbalanceTreshold = imbalanceBuffer + poolFee * _FEE_IMBALANCE_MULTIPLIER;
        if (a > b) return (a - b).divDown(a) <= imbalanceTreshold;
        return (b - a).divDown(b) <= imbalanceTreshold;
    }
}

interface ICurveRegistryCache {
    event PoolInitialized(address indexed pool, uint256 indexed pid);

    function BOOSTER() external view returns (IBooster);

    function initPool(address pool_) external;

    function initPool(address pool_, uint256 pid_) external;

    function lpToken(address pool_) external view returns (address);

    function assetType(address pool_) external view returns (CurvePoolUtils.AssetType);

    function isRegistered(address pool_) external view returns (bool);

    function hasCoinDirectly(address pool_, address coin_) external view returns (bool);

    function hasCoinAnywhere(address pool_, address coin_) external view returns (bool);

    function basePool(address pool_) external view returns (address);

    function coinIndex(address pool_, address coin_) external view returns (int128);

    function nCoins(address pool_) external view returns (uint256);

    function coinIndices(
        address pool_,
        address from_,
        address to_
    ) external view returns (int128, int128, bool);

    function decimals(address pool_) external view returns (uint256[] memory);

    function interfaceVersion(address pool_) external view returns (uint256);

    function poolFromLpToken(address lpToken_) external view returns (address);

    function coins(address pool_) external view returns (address[] memory);

    function getPid(address _pool) external view returns (uint256);

    function getRewardPool(address _pool) external view returns (address);

    function isShutdownPid(uint256 pid_) external view returns (bool);

    /// @notice this returns the underlying coins of a pool, including the underlying of the base pool
    /// if the given pool is a meta pool
    /// This does not return the LP token of the base pool as an underlying
    /// e.g. if the pool is 3CrvFrax, this will return FRAX, DAI, USDC, USDT
    function getAllUnderlyingCoins(address pool) external view returns (address[] memory);
}

interface IController {
    event PoolAdded(address indexed pool);
    event PoolRemoved(address indexed pool);
    event PoolShutdown(address indexed pool);
    event ConvexBoosterSet(address convexBooster);
    event CurveHandlerSet(address curveHandler);
    event ConvexHandlerSet(address convexHandler);
    event CurveRegistryCacheSet(address curveRegistryCache);
    event InflationManagerSet(address inflationManager);
    event BondingSet(address bonding);
    event FeeRecipientSet(address feeRecipient);
    event PriceOracleSet(address priceOracle);
    event WeightUpdateMinDelaySet(uint256 weightUpdateMinDelay);
    event PauseManagerSet(address indexed manager, bool isManager);
    event MultiDepositsWithdrawsWhitelistSet(address pool, bool allowed);
    event MinimumTaintedTransferAmountSet(address indexed token, uint256 amount);
    event DefaultPoolAdapterSet(address poolAdapter);
    event CustomPoolAdapterSet(address indexed pool, address poolAdapter);

    struct WeightUpdate {
        address conicPoolAddress;
        IConicPoolWeightManagement.PoolWeight[] weights;
    }

    function initialize(address _lpTokenStaker) external;

    // inflation manager

    function inflationManager() external view returns (IInflationManager);

    function setInflationManager(address manager) external;

    // views
    function curveRegistryCache() external view returns (ICurveRegistryCache);

    // pool adapter
    function poolAdapterFor(address pool) external view returns (IPoolAdapter);

    function defaultPoolAdapter() external view returns (IPoolAdapter);

    function setDefaultPoolAdapter(address poolAdapter) external;

    function setCustomPoolAdapter(address pool, address poolAdapter) external;

    /// lp token staker
    function switchLpTokenStaker(address _lpTokenStaker) external;

    function lpTokenStaker() external view returns (ILpTokenStaker);

    // bonding
    function bonding() external view returns (IBonding);

    function setBonding(address _bonding) external;

    // fees
    function feeRecipient() external view returns (IFeeRecipient);

    function setFeeRecipient(address _feeRecipient) external;

    // oracle
    function priceOracle() external view returns (IGenericOracle);

    function setPriceOracle(address oracle) external;

    // pool functions

    function listPools() external view returns (address[] memory);

    function listActivePools() external view returns (address[] memory);

    function isPool(address poolAddress) external view returns (bool);

    function isActivePool(address poolAddress) external view returns (bool);

    function addPool(address poolAddress) external;

    function shutdownPool(address poolAddress) external;

    function removePool(address poolAddress) external;

    function cncToken() external view returns (address);

    function lastWeightUpdate(address poolAddress) external view returns (uint256);

    function updateWeights(WeightUpdate memory update) external;

    function updateAllWeights(WeightUpdate[] memory weights) external;

    // handler functions

    function convexBooster() external view returns (address);

    function curveHandler() external view returns (address);

    function convexHandler() external view returns (address);

    function setConvexBooster(address _convexBooster) external;

    function setCurveHandler(address _curveHandler) external;

    function setConvexHandler(address _convexHandler) external;

    function setCurveRegistryCache(address curveRegistryCache_) external;

    function setWeightUpdateMinDelay(uint256 delay) external;

    function isPauseManager(address account) external view returns (bool);

    function listPauseManagers() external view returns (address[] memory);

    function setPauseManager(address account, bool isManager) external;

    // deposit/withdrawal whitelist
    function isAllowedMultipleDepositsWithdraws(address poolAddress) external view returns (bool);

    function setAllowedMultipleDepositsWithdraws(address account, bool allowed) external;

    function getMultipleDepositsWithdrawsWhitelist() external view returns (address[] memory);

    // tainted transfer amount
    function setMinimumTaintedTransferAmount(address token, uint256 amount) external;

    function getMinimumTaintedTransferAmount(address token) external view returns (uint256);

    // constants

    function MAX_WEIGHT_UPDATE_MIN_DELAY() external view returns (uint256);

    function MIN_WEIGHT_UPDATE_MIN_DELAY() external view returns (uint256);
}

contract LpToken is ILpToken, ERC20 {
    IController public immutable controller;

    address public immutable override minter;

    modifier onlyMinter() {
        require(msg.sender == minter, "not authorized");
        _;
    }

    mapping(address => uint256) internal _lastEvent;

    uint8 private __decimals;

    constructor(
        address _controller,
        address _minter,
        uint8 _decimals,
        string memory name_,
        string memory symbol_
    ) ERC20(name_, symbol_) {
        controller = IController(_controller);
        minter = _minter;
        __decimals = _decimals;
    }

    function decimals() public view virtual override(ERC20, IERC20Metadata) returns (uint8) {
        return __decimals;
    }

    function mint(
        address _account,
        uint256 _amount,
        address ubo
    ) external override onlyMinter returns (uint256) {
        _ensureSingleEvent(ubo, _amount);
        _mint(_account, _amount);
        return _amount;
    }

    function burn(
        address _owner,
        uint256 _amount,
        address ubo
    ) external override onlyMinter returns (uint256) {
        _ensureSingleEvent(ubo, _amount);
        _burn(_owner, _amount);
        return _amount;
    }

    function taint(address from, address to, uint256 amount) external {
        require(msg.sender == address(controller.lpTokenStaker()), "not authorized");
        _taint(from, to, amount);
    }

    function _beforeTokenTransfer(address from, address to, uint256 amount) internal override {
        // mint/burn are handled in their respective functions
        if (from == address(0) || to == address(0)) return;

        // lpTokenStaker calls `taint` as needed
        address lpTokenStaker = address(controller.lpTokenStaker());
        if (from == lpTokenStaker || to == lpTokenStaker) return;

        // taint any other type of transfer
        _taint(from, to, amount);
    }

    function _ensureSingleEvent(address ubo, uint256 amount) internal {
        if (
            !controller.isAllowedMultipleDepositsWithdraws(ubo) &&
            amount > controller.getMinimumTaintedTransferAmount(address(this))
        ) {
            require(_lastEvent[ubo] != block.number, "cannot mint/burn twice in a block");
            _lastEvent[ubo] = block.number;
        }
    }

    function _taint(address from, address to, uint256 amount) internal {
        if (
            from != to &&
            _lastEvent[from] == block.number &&
            amount > controller.getMinimumTaintedTransferAmount(address(this))
        ) {
            _lastEvent[to] = block.number;
        }
    }
}

{
  "compilationTarget": {
    "LpToken.sol": "LpToken"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}