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

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import './IAuthorizer.sol';

/**
 * @title Authorizer
 * @dev Authorization module to be used by contracts that need to implement permissions for their methods.
 * It provides a permissions model to list who is allowed to call what function in a contract. And only accounts
 * authorized to manage those permissions are the ones that are allowed to authorize or unauthorize accounts.
 */
contract Authorizer is IAuthorizer {
    // Constant used to denote that a permission is open to anyone
    address public constant ANY_ADDRESS = address(0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF);

    // Internal mapping to tell who is allowed to do what indexed by (account, function selector)
    mapping (address => mapping (bytes4 => bool)) private authorized;

    /**
     * @dev Modifier that should be used to tag protected functions
     */
    modifier auth() {
        _authenticate(msg.sender, msg.sig);
        _;
    }

    /**
     * @dev Tells whether someone is allowed to call a function or not. It returns true if it's allowed to anyone.
     * @param who Address asking permission for
     * @param what Function selector asking permission for
     */
    function isAuthorized(address who, bytes4 what) public view override returns (bool) {
        return authorized[ANY_ADDRESS][what] || authorized[who][what];
    }

    /**
     * @dev Authorizes someone to call a function. Sender must be authorize to do so.
     * @param who Address to be authorized
     * @param what Function selector to be granted
     */
    function authorize(address who, bytes4 what) external override auth {
        _authorize(who, what);
    }

    /**
     * @dev Unauthorizes someone to call a function. Sender must be authorize to do so.
     * @param who Address to be unauthorized
     * @param what Function selector to be revoked
     */
    function unauthorize(address who, bytes4 what) external override auth {
        _unauthorize(who, what);
    }

    /**
     * @dev Internal function to authenticate someone over a function.
     * It reverts if the given account is not authorized to call the requested function.
     * @param who Address to be authenticated
     * @param what Function selector to be authenticated
     */
    function _authenticate(address who, bytes4 what) internal view {
        require(isAuthorized(who, what), 'AUTH_SENDER_NOT_ALLOWED');
    }

    /**
     * @dev Internal function to authorize someone to call a function
     * @param who Address to be authorized
     * @param what Function selector to be granted
     */
    function _authorize(address who, bytes4 what) internal {
        authorized[who][what] = true;
        emit Authorized(who, what);
    }

    /**
     * @dev Internal function to unauthorize someone to call a function
     * @param who Address to be unauthorized
     * @param what Function selector to be revoked
     */
    function _unauthorize(address who, bytes4 what) internal {
        authorized[who][what] = false;
        emit Unauthorized(who, what);
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/security/ReentrancyGuard.sol';

import '@mimic-fi/v2-smart-vault/contracts/ISmartVault.sol';
import '@mimic-fi/v2-helpers/contracts/auth/Authorizer.sol';
import '@mimic-fi/v2-helpers/contracts/utils/Denominations.sol';
import '@mimic-fi/v2-helpers/contracts/utils/ERC20Helpers.sol';
import '@mimic-fi/v2-registry/contracts/implementations/BaseAuthorizedImplementation.sol';

import './IAction.sol';

/**
 * @title BaseAction
 * @dev Simple action implementation with a Smart Vault reference and using the Authorizer mixin
 */
contract BaseAction is IAction, BaseAuthorizedImplementation, ReentrancyGuard {
    bytes32 public constant override NAMESPACE = keccak256('ACTION');

    // Smart Vault reference
    ISmartVault public override smartVault;

    /**
     * @dev Emitted every time a new smart vault is set
     */
    event SmartVaultSet(address indexed smartVault);

    /**
     * @dev Creates a new BaseAction
     * @param admin Address to be granted authorize and unauthorize permissions
     * @param registry Address of the Mimic Registry
     */
    constructor(address admin, address registry) BaseAuthorizedImplementation(admin, registry) {
        // solhint-disable-previous-line no-empty-blocks
    }

    /**
     * @dev Sets the Smart Vault tied to the Action. Sender must be authorized. It can be set only once.
     * @param newSmartVault Address of the smart vault to be set
     */
    function setSmartVault(address newSmartVault) external auth {
        require(address(smartVault) == address(0), 'SMART_VAULT_ALREADY_SET');
        smartVault = ISmartVault(newSmartVault);
        emit SmartVaultSet(newSmartVault);
    }

    /**
     * @dev Tells the balance of the Smart Vault for a given token
     * @param token Address of the token querying the balance of
     * @notice Denominations.NATIVE_TOKEN_ADDRESS can be used to query the native token balance
     */
    function _balanceOf(address token) internal view returns (uint256) {
        return ERC20Helpers.balanceOf(token, address(smartVault));
    }

    /**
     * @dev Tells the wrapped native token address if the given address is the native token
     * @param token Address of the token to be checked
     */
    function _wrappedIfNative(address token) internal view returns (address) {
        return Denominations.isNativeToken(token) ? smartVault.wrappedNativeToken() : token;
    }

    /**
     * @dev Tells whether the given token is either the native or wrapped native token
     * @param token Address of the token being queried
     */
    function _isWrappedOrNativeToken(address token) internal view returns (bool) {
        return Denominations.isNativeToken(token) || token == smartVault.wrappedNativeToken();
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@mimic-fi/v2-helpers/contracts/auth/Authorizer.sol';

import './BaseImplementation.sol';

/**
 * @title BaseAuthorizedImplementation
 * @dev BaseImplementation using the Authorizer mixin. Base implementations that want to use the Authorizer
 * permissions mechanism should inherit from this contract instead.
 */
abstract contract BaseAuthorizedImplementation is BaseImplementation, Authorizer {
    /**
     * @dev Creates a new BaseAuthorizedImplementation
     * @param admin Address to be granted authorize and unauthorize permissions
     * @param registry Address of the Mimic Registry
     */
    constructor(address admin, address registry) BaseImplementation(registry) {
        _authorize(admin, Authorizer.authorize.selector);
        _authorize(admin, Authorizer.unauthorize.selector);
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@openzeppelin/contracts/proxy/utils/Initializable.sol';

import './IImplementation.sol';
import '../registry/IRegistry.sol';

/**
 * @title BaseImplementation
 * @dev This implementation contract comes with an immutable reference to an implementations registry where it should
 * be registered as well (checked during initialization). It allows requesting new instances of other registered
 * implementations to as another safety check to make sure valid instances are referenced in case it's needed.
 */
abstract contract BaseImplementation is IImplementation {
    // Immutable implementations registry reference
    address public immutable override registry;

    /**
     * @dev Creates a new BaseImplementation
     * @param _registry Address of the Mimic Registry where dependencies will be validated against
     */
    constructor(address _registry) {
        registry = _registry;
    }

    /**
     * @dev Internal function to validate a new dependency that must be registered as stateless.
     * It checks the new dependency is registered, not deprecated, and stateless.
     * @param dependency New stateless dependency to be set
     */
    function _validateStatelessDependency(address dependency) internal view {
        require(_validateDependency(dependency), 'DEPENDENCY_NOT_STATELESS');
    }

    /**
     * @dev Internal function to validate a new dependency that cannot be registered as stateless.
     * It checks the new dependency is registered, not deprecated, and not stateful.
     * @param dependency New stateful dependency to be set
     */
    function _validateStatefulDependency(address dependency) internal view {
        require(!_validateDependency(dependency), 'DEPENDENCY_NOT_STATEFUL');
    }

    /**
     * @dev Internal function to validate a new dependency. It checks the dependency is registered and not deprecated.
     * @param dependency New dependency to be set
     * @return Whether the dependency is stateless or not
     */
    function _validateDependency(address dependency) private view returns (bool) {
        (bool stateless, bool deprecated, bytes32 namespace) = IRegistry(registry).implementationData(dependency);
        require(namespace != bytes32(0), 'DEPENDENCY_NOT_REGISTERED');
        require(!deprecated, 'DEPENDENCY_DEPRECATED');
        return stateless;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@openzeppelin/contracts/utils/cryptography/ECDSA.sol';
import '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';

import '@mimic-fi/v2-helpers/contracts/math/FixedPoint.sol';
import '@mimic-fi/v2-helpers/contracts/math/UncheckedMath.sol';

import '@mimic-fi/v2-smart-vaults-base/contracts/actions/BaseAction.sol';
import '@mimic-fi/v2-smart-vaults-base/contracts/actions/TokenThresholdAction.sol';
import '@mimic-fi/v2-smart-vaults-base/contracts/actions/RelayedAction.sol';

abstract contract BaseSwapper is BaseAction, TokenThresholdAction, RelayedAction {
    using FixedPoint for uint256;
    using UncheckedMath for uint256;
    using EnumerableSet for EnumerableSet.AddressSet;

    address public tokenOut;
    address public swapSigner;
    uint256 public defaultMaxSlippage;
    mapping (address => uint256) public tokenMaxSlippages;
    EnumerableSet.AddressSet private deniedTokens;

    event TokenOutSet(address indexed tokenOut);
    event SwapSignerSet(address indexed swapSigner);
    event DefaultMaxSlippageSet(uint256 maxSlippage);
    event TokenMaxSlippageSet(address indexed token, uint256 maxSlippage);
    event DeniedTokenSet(address indexed token, bool denied);

    constructor(address admin, address registry) BaseAction(admin, registry) {
        // solhint-disable-previous-line no-empty-blocks
    }

    function getTokenSlippage(address token) public view returns (uint256) {
        uint256 tokenMaxSlippage = tokenMaxSlippages[token];
        return tokenMaxSlippage > 0 ? tokenMaxSlippage : defaultMaxSlippage;
    }

    function isTokenDenied(address token) public view returns (bool) {
        return deniedTokens.contains(token);
    }

    function getDeniedTokens() external view returns (address[] memory) {
        return deniedTokens.values();
    }

    function setTokenOut(address newTokenOut) external auth {
        require(newTokenOut != address(0), 'SWAPPER_TOKEN_ADDRESS_ZERO');
        tokenOut = newTokenOut;
        emit TokenOutSet(newTokenOut);
    }

    function setSwapSigner(address newSwapSigner) external auth {
        swapSigner = newSwapSigner;
        emit SwapSignerSet(newSwapSigner);
    }

    function setDefaultMaxSlippage(uint256 slippage) external auth {
        require(slippage <= FixedPoint.ONE, 'SWAPPER_DEFAULT_SLIPPAGE_ABOVE_1');
        defaultMaxSlippage = slippage;
        emit DefaultMaxSlippageSet(slippage);
    }

    function setTokenMaxSlippage(address token, uint256 slippage) external auth {
        require(token != address(0), 'SWAPPER_TOKEN_ADDRESS_ZERO');
        require(slippage <= FixedPoint.ONE, 'SWAPPER_TOKEN_SLIPPAGE_ABOVE_1');
        tokenMaxSlippages[token] = slippage;
        emit TokenMaxSlippageSet(token, slippage);
    }

    function setDeniedTokens(address[] memory tokens, bool[] memory denies) external auth {
        require(tokens.length == denies.length, 'SWAPPER_DENIED_TOKENS_INV_LEN');
        for (uint256 i = 0; i < tokens.length; i = i.uncheckedAdd(1)) {
            if (denies[i]) deniedTokens.add(tokens[i]);
            else deniedTokens.remove(tokens[i]);
            emit DeniedTokenSet(tokens[i], denies[i]);
        }
    }

    function _validateToken(address token) internal view {
        require(token != address(0), 'SWAPPER_TOKEN_ADDRESS_ZERO');
        require(!Denominations.isNativeToken(token), 'SWAPPER_NATIVE_TOKEN');
        require(!isTokenDenied(token), 'SWAPPER_DENIED_TOKEN');
    }

    function _validateSlippage(address tokenIn, uint256 minAmountOut, uint256 expectedAmountOut) internal view {
        if (minAmountOut >= expectedAmountOut) return; // Return if in case we have a positive slippage
        uint256 slippage = FixedPoint.ONE - minAmountOut.divUp(expectedAmountOut);
        require(slippage <= getTokenSlippage(tokenIn), 'SWAPPER_SLIPPAGE_TOO_BIG');
    }

    function _validateSig(
        address tokenIn,
        uint256 amountIn,
        uint256 minAmountOut,
        uint256 expectedAmountOut,
        uint256 deadline,
        bytes memory data,
        bytes memory sig
    ) internal view {
        bytes32 message = _hash(tokenIn, amountIn, minAmountOut, expectedAmountOut, deadline, data);
        address signer = ECDSA.recover(ECDSA.toEthSignedMessageHash(message), sig);
        require(signer == swapSigner, 'SWAPPER_INVALID_SIGNATURE');
        require(block.timestamp <= deadline, 'SWAPPER_DEADLINE_EXPIRED');
    }

    function _hash(
        address tokenIn,
        uint256 amountIn,
        uint256 minAmountOut,
        uint256 expectedAmountOut,
        uint256 deadline,
        bytes memory data
    ) private view returns (bytes32) {
        bool isBuy = false;
        return
            keccak256(
                abi.encodePacked(tokenIn, tokenOut, isBuy, amountIn, minAmountOut, expectedAmountOut, deadline, data)
            );
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

/**
 * @title Denominations
 * @dev Provides a list of ground denominations for those tokens that cannot be represented by an ERC20.
 * For now, the only needed is the native token that could be ETH, MATIC, or other depending on the layer being operated.
 */
library Denominations {
    address internal constant NATIVE_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    // Fiat currencies follow https://en.wikipedia.org/wiki/ISO_4217
    address internal constant USD = address(840);

    function isNativeToken(address token) internal pure returns (bool) {
        return token == NATIVE_TOKEN;
    }
}

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

    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");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' 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) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        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 if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // 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))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } 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 (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // 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: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';

import './Denominations.sol';

/**
 * @title ERC20Helpers
 * @dev Provides a list of ERC20 helper methods
 */
library ERC20Helpers {
    function approve(address token, address to, uint256 amount) internal {
        SafeERC20.safeApprove(IERC20(token), to, 0);
        SafeERC20.safeApprove(IERC20(token), to, amount);
    }

    function transfer(address token, address to, uint256 amount) internal {
        if (Denominations.isNativeToken(token)) Address.sendValue(payable(to), amount);
        else SafeERC20.safeTransfer(IERC20(token), to, amount);
    }

    function balanceOf(address token, address account) internal view returns (uint256) {
        if (Denominations.isNativeToken(token)) return address(account).balance;
        else return IERC20(token).balanceOf(address(account));
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 *  Trying to delete such a structure from storage will likely result in data corruption, rendering the structure unusable.
 *  See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 *  In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

/**
 * @title FixedPoint
 * @dev Math library to operate with fixed point values with 18 decimals
 */
library FixedPoint {
    // 1 in fixed point value: 18 decimal places
    uint256 internal constant ONE = 1e18;

    /**
     * @dev Multiplies two fixed point numbers rounding down
     */
    function mulDown(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            uint256 product = a * b;
            require(a == 0 || product / a == b, 'MUL_OVERFLOW');
            return product / ONE;
        }
    }

    /**
     * @dev Multiplies two fixed point numbers rounding up
     */
    function mulUp(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            uint256 product = a * b;
            require(a == 0 || product / a == b, 'MUL_OVERFLOW');
            return product == 0 ? 0 : (((product - 1) / ONE) + 1);
        }
    }

    /**
     * @dev Divides two fixed point numbers rounding down
     */
    function divDown(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            require(b != 0, 'ZERO_DIVISION');
            if (a == 0) return 0;
            uint256 aInflated = a * ONE;
            require(aInflated / a == ONE, 'DIV_INTERNAL');
            return aInflated / b;
        }
    }

    /**
     * @dev Divides two fixed point numbers rounding up
     */
    function divUp(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            require(b != 0, 'ZERO_DIVISION');
            if (a == 0) return 0;
            uint256 aInflated = a * ONE;
            require(aInflated / a == ONE, 'DIV_INTERNAL');
            return ((aInflated - 1) / b) + 1;
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity >=0.8.0;

import '@mimic-fi/v2-smart-vault/contracts/ISmartVault.sol';
import '@mimic-fi/v2-helpers/contracts/auth/IAuthorizer.sol';

/**
 * @title IAction
 * @dev Action interface it must follow the IAuthorizer interface
 */
interface IAction is IAuthorizer {
    /**
     * @dev Emitted every time an action is executed
     */
    event Executed();

    /**
     * @dev Tells the address of the Smart Vault tied to it, it cannot be changed
     */
    function smartVault() external view returns (ISmartVault);
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity >=0.8.0;

/**
 * @title IAuthorizer
 */
interface IAuthorizer {
    /**
     * @dev Emitted when an account is authorized to call a function
     */
    event Authorized(address indexed who, bytes4 what);

    /**
     * @dev Emitted when an account is unauthorized to call a function
     */
    event Unauthorized(address indexed who, bytes4 what);

    /**
     * @dev Authorizes someone to call a function. Sender must be authorize to do so.
     * @param who Address to be authorized
     * @param what Function selector to be granted
     */
    function authorize(address who, bytes4 what) external;

    /**
     * @dev Unauthorizes someone to call a function. Sender must be authorize to do so.
     * @param who Address to be unauthorized
     * @param what Function selector to be revoked
     */
    function unauthorize(address who, bytes4 what) external;

    /**
     * @dev Tells whether someone is allowed to call a function or not. It returns true if it's allowed to anyone.
     * @param who Address asking permission for
     * @param what Function selector asking permission for
     */
    function isAuthorized(address who, bytes4 what) external view returns (bool);
}

// 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: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity >=0.8.0;

// solhint-disable func-name-mixedcase

/**
 * @title IImplementation
 * @dev Implementation interface that must be followed for implementations to be registered in the Mimic Registry
 */
interface IImplementation {
    /**
     * @dev Tells the namespace under which the implementation is registered in the Mimic Registry
     */
    function NAMESPACE() external view returns (bytes32);

    /**
     * @dev Tells the address of the Mimic Registry
     */
    function registry() external view returns (address);
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity >=0.8.0;

/**
 * @title IPriceFeedProvider
 * @dev Contract providing price feed references for (base, quote) token pairs
 */
interface IPriceFeedProvider {
    /**
     * @dev Emitted every time a price feed is set for (base, quote) pair
     */
    event PriceFeedSet(address indexed base, address indexed quote, address feed);

    /**
     * @dev Tells the price feed address for (base, quote) pair. It returns the zero address if there is no one set.
     * @param base Token to be rated
     * @param quote Token used for the price rate
     */
    function getPriceFeed(address base, address quote) external view returns (address);

    /**
     * @dev Sets a of price feed
     * @param base Token base to be set
     * @param quote Token quote to be set
     * @param feed Price feed to be set
     */
    function setPriceFeed(address base, address quote, address feed) external;

    /**
     * @dev Sets a list of price feeds
     * @param bases List of token bases to be set
     * @param quotes List of token quotes to be set
     * @param feeds List of price feeds to be set
     */
    function setPriceFeeds(address[] memory bases, address[] memory quotes, address[] memory feeds) external;
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity >=0.8.0;

import '@mimic-fi/v2-helpers/contracts/auth/IAuthorizer.sol';

/**
 * @title IRegistry
 * @dev Registry interface, it must follow the IAuthorizer interface.
 */
interface IRegistry is IAuthorizer {
    /**
     * @dev Emitted every time a new implementation is registered
     */
    event Registered(bytes32 indexed namespace, address indexed implementation, bool stateless);

    /**
     * @dev Emitted every time an implementation is deprecated
     */
    event Deprecated(bytes32 indexed namespace, address indexed implementation);

    /**
     * @dev Tells the data of an implementation:
     * @param implementation Address of the implementation to request it's data
     */
    function implementationData(address implementation)
        external
        view
        returns (bool stateless, bool deprecated, bytes32 namespace);

    /**
     * @dev Tells if a specific implementation is registered under a certain namespace and it's not deprecated
     * @param namespace Namespace asking for
     * @param implementation Address of the implementation to be checked
     */
    function isActive(bytes32 namespace, address implementation) external view returns (bool);

    /**
     * @dev Registers a new implementation for a given namespace
     * @param namespace Namespace to be used for the implementation
     * @param implementation Address of the implementation to be registered
     * @param stateless Whether the implementation is stateless or not
     */
    function register(bytes32 namespace, address implementation, bool stateless) external;

    /**
     * @dev Deprecates a registered implementation
     * @param implementation Address of the implementation to be deprecated
     */
    function deprecate(address implementation) external;
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@mimic-fi/v2-helpers/contracts/auth/IAuthorizer.sol';
import '@mimic-fi/v2-price-oracle/contracts/feeds/IPriceFeedProvider.sol';
import '@mimic-fi/v2-registry/contracts/implementations/IImplementation.sol';

/**
 * @title ISmartVault
 * @dev Mimic Smart Vault interface to manage assets. It must support also `IImplementation` and `IAuthorizer`
 */
interface ISmartVault is IPriceFeedProvider, IImplementation, IAuthorizer {
    enum SwapLimit {
        Slippage,
        MinAmountOut
    }

    enum BridgeLimit {
        Slippage,
        MinAmountOut
    }

    /**
     * @dev Emitted every time a new strategy is set for the Smart Vault
     */
    event StrategySet(address indexed strategy, bool allowed);

    /**
     * @dev Emitted every time a new price oracle is set for the Smart Vault
     */
    event PriceOracleSet(address indexed priceOracle);

    /**
     * @dev Emitted every time a new swap connector is set for the Smart Vault
     */
    event SwapConnectorSet(address indexed swapConnector);

    /**
     * @dev Emitted every time a new bridge connector is set for the Smart Vault
     */
    event BridgeConnectorSet(address indexed bridgeConnector);

    /**
     * @dev Emitted every time a new fee collector is set
     */
    event FeeCollectorSet(address indexed feeCollector);

    /**
     * @dev Emitted every time the withdraw fee percentage is set
     */
    event WithdrawFeeSet(uint256 pct, uint256 cap, address token, uint256 period);

    /**
     * @dev Emitted every time the performance fee percentage is set
     */
    event PerformanceFeeSet(uint256 pct, uint256 cap, address token, uint256 period);

    /**
     * @dev Emitted every time the swap fee percentage is set
     */
    event SwapFeeSet(uint256 pct, uint256 cap, address token, uint256 period);

    /**
     * @dev Emitted every time the bridge fee percentage is set
     */
    event BridgeFeeSet(uint256 pct, uint256 cap, address token, uint256 period);

    /**
     * @dev Emitted every time `call` is called
     */
    event Call(address indexed target, bytes callData, uint256 value, bytes result, bytes data);

    /**
     * @dev Emitted every time `collect` is called
     */
    event Collect(address indexed token, address indexed from, uint256 collected, bytes data);

    /**
     * @dev Emitted every time `withdraw` is called
     */
    event Withdraw(address indexed token, address indexed recipient, uint256 withdrawn, uint256 fee, bytes data);

    /**
     * @dev Emitted every time `wrap` is called
     */
    event Wrap(uint256 amount, uint256 wrapped, bytes data);

    /**
     * @dev Emitted every time `unwrap` is called
     */
    event Unwrap(uint256 amount, uint256 unwrapped, bytes data);

    /**
     * @dev Emitted every time `claim` is called
     */
    event Claim(address indexed strategy, address[] tokens, uint256[] amounts, bytes data);

    /**
     * @dev Emitted every time `join` is called
     */
    event Join(
        address indexed strategy,
        address[] tokensIn,
        uint256[] amountsIn,
        address[] tokensOut,
        uint256[] amountsOut,
        uint256 value,
        uint256 slippage,
        bytes data
    );

    /**
     * @dev Emitted every time `exit` is called
     */
    event Exit(
        address indexed strategy,
        address[] tokensIn,
        uint256[] amountsIn,
        address[] tokensOut,
        uint256[] amountsOut,
        uint256 value,
        uint256[] fees,
        uint256 slippage,
        bytes data
    );

    /**
     * @dev Emitted every time `swap` is called
     */
    event Swap(
        uint8 indexed source,
        address indexed tokenIn,
        address indexed tokenOut,
        uint256 amountIn,
        uint256 amountOut,
        uint256 minAmountOut,
        uint256 fee,
        bytes data
    );

    /**
     * @dev Emitted every time `bridge` is called
     */
    event Bridge(
        uint8 indexed source,
        uint256 indexed chainId,
        address indexed token,
        uint256 amountIn,
        uint256 minAmountOut,
        uint256 fee,
        address recipient,
        bytes data
    );

    /**
     * @dev Tells a strategy is allowed or not
     * @param strategy Address of the strategy being queried
     */
    function isStrategyAllowed(address strategy) external view returns (bool);

    /**
     * @dev Tells the invested value for a strategy
     * @param strategy Address of the strategy querying the invested value of
     */
    function investedValue(address strategy) external view returns (uint256);

    /**
     * @dev Tells the last value accrued for a strategy. Note this value can be outdated.
     * @param strategy Address of the strategy querying the last value of
     */
    function lastValue(address strategy) external view returns (uint256);

    /**
     * @dev Tells the price oracle associated to a Smart Vault
     */
    function priceOracle() external view returns (address);

    /**
     * @dev Tells the swap connector associated to a Smart Vault
     */
    function swapConnector() external view returns (address);

    /**
     * @dev Tells the bridge connector associated to a Smart Vault
     */
    function bridgeConnector() external view returns (address);

    /**
     * @dev Tells the address where fees will be deposited
     */
    function feeCollector() external view returns (address);

    /**
     * @dev Tells the withdraw fee configuration
     */
    function withdrawFee()
        external
        view
        returns (uint256 pct, uint256 cap, address token, uint256 period, uint256 totalCharged, uint256 nextResetTime);

    /**
     * @dev Tells the performance fee configuration
     */
    function performanceFee()
        external
        view
        returns (uint256 pct, uint256 cap, address token, uint256 period, uint256 totalCharged, uint256 nextResetTime);

    /**
     * @dev Tells the swap fee configuration
     */
    function swapFee()
        external
        view
        returns (uint256 pct, uint256 cap, address token, uint256 period, uint256 totalCharged, uint256 nextResetTime);

    /**
     * @dev Tells the bridge fee configuration
     */
    function bridgeFee()
        external
        view
        returns (uint256 pct, uint256 cap, address token, uint256 period, uint256 totalCharged, uint256 nextResetTime);

    /**
     * @dev Tells the address of the wrapped native token
     */
    function wrappedNativeToken() external view returns (address);

    /**
     * @dev Sets a new strategy as allowed or not for a Smart Vault
     * @param strategy Address of the strategy to be set
     * @param allowed Whether the strategy is allowed or not
     */
    function setStrategy(address strategy, bool allowed) external;

    /**
     * @dev Sets a new price oracle to a Smart Vault
     * @param newPriceOracle Address of the new price oracle to be set
     */
    function setPriceOracle(address newPriceOracle) external;

    /**
     * @dev Sets a new swap connector to a Smart Vault
     * @param newSwapConnector Address of the new swap connector to be set
     */
    function setSwapConnector(address newSwapConnector) external;

    /**
     * @dev Sets a new bridge connector to a Smart Vault
     * @param newBridgeConnector Address of the new bridge connector to be set
     */
    function setBridgeConnector(address newBridgeConnector) external;

    /**
     * @dev Sets a new fee collector
     * @param newFeeCollector Address of the new fee collector to be set
     */
    function setFeeCollector(address newFeeCollector) external;

    /**
     * @dev Sets a new withdraw fee configuration
     * @param pct Withdraw fee percentage to be set
     * @param cap New maximum amount of withdraw fees to be charged per period
     * @param token Address of the token cap to be set
     * @param period New cap period length in seconds for the withdraw fee
     */
    function setWithdrawFee(uint256 pct, uint256 cap, address token, uint256 period) external;

    /**
     * @dev Sets a new performance fee configuration
     * @param pct Performance fee percentage to be set
     * @param cap New maximum amount of performance fees to be charged per period
     * @param token Address of the token cap to be set
     * @param period New cap period length in seconds for the performance fee
     */
    function setPerformanceFee(uint256 pct, uint256 cap, address token, uint256 period) external;

    /**
     * @dev Sets a new swap fee configuration
     * @param pct Swap fee percentage to be set
     * @param cap New maximum amount of swap fees to be charged per period
     * @param token Address of the token cap to be set
     * @param period New cap period length in seconds for the swap fee
     */
    function setSwapFee(uint256 pct, uint256 cap, address token, uint256 period) external;

    /**
     * @dev Sets a new bridge fee configuration
     * @param pct Bridge fee percentage to be set
     * @param cap New maximum amount of bridge fees to be charged per period
     * @param token Address of the token cap to be set
     * @param period New cap period length in seconds for the bridge fee
     */
    function setBridgeFee(uint256 pct, uint256 cap, address token, uint256 period) external;

    /**
     * @dev Tells the price of a token (base) in a given quote
     * @param base Token to rate
     * @param quote Token used for the price rate
     */
    function getPrice(address base, address quote) external view returns (uint256);

    /**
     * @dev Execute an arbitrary call from a Smart Vault
     * @param target Address where the call will be sent
     * @param callData Calldata to be used for the call
     * @param value Value in wei that will be attached to the call
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return result Call response if it was successful, otherwise it reverts
     */
    function call(address target, bytes memory callData, uint256 value, bytes memory data)
        external
        returns (bytes memory result);

    /**
     * @dev Collect tokens from a sender to a Smart Vault
     * @param token Address of the token to be collected
     * @param from Address where the tokens will be transfer from
     * @param amount Amount of tokens to be transferred
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return collected Amount of tokens assigned to the Smart Vault
     */
    function collect(address token, address from, uint256 amount, bytes memory data)
        external
        returns (uint256 collected);

    /**
     * @dev Withdraw tokens to an external account
     * @param token Address of the token to be withdrawn
     * @param amount Amount of tokens to withdraw
     * @param recipient Address where the tokens will be transferred to
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return withdrawn Amount of tokens transferred to the recipient address
     */
    function withdraw(address token, uint256 amount, address recipient, bytes memory data)
        external
        returns (uint256 withdrawn);

    /**
     * @dev Wrap an amount of native tokens to the wrapped ERC20 version of it
     * @param amount Amount of native tokens to be wrapped
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return wrapped Amount of tokens wrapped
     */
    function wrap(uint256 amount, bytes memory data) external returns (uint256 wrapped);

    /**
     * @dev Unwrap an amount of wrapped native tokens
     * @param amount Amount of wrapped native tokens to unwrapped
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return unwrapped Amount of tokens unwrapped
     */
    function unwrap(uint256 amount, bytes memory data) external returns (uint256 unwrapped);

    /**
     * @dev Claim strategy rewards
     * @param strategy Address of the strategy to claim rewards
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return tokens Addresses of the tokens received as rewards
     * @return amounts Amounts of the tokens received as rewards
     */
    function claim(address strategy, bytes memory data)
        external
        returns (address[] memory tokens, uint256[] memory amounts);

    /**
     * @dev Join a strategy with an amount of tokens
     * @param strategy Address of the strategy to join
     * @param tokensIn List of token addresses to join with
     * @param amountsIn List of token amounts to join with
     * @param slippage Slippage that will be used to compute the join
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return tokensOut List of token addresses received after the join
     * @return amountsOut List of token amounts received after the join
     */
    function join(
        address strategy,
        address[] memory tokensIn,
        uint256[] memory amountsIn,
        uint256 slippage,
        bytes memory data
    ) external returns (address[] memory tokensOut, uint256[] memory amountsOut);

    /**
     * @dev Exit a strategy
     * @param strategy Address of the strategy to exit
     * @param tokensIn List of token addresses to exit with
     * @param amountsIn List of token amounts to exit with
     * @param slippage Slippage that will be used to compute the exit
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return tokensOut List of token addresses received after the exit
     * @return amountsOut List of token amounts received after the exit
     */
    function exit(
        address strategy,
        address[] memory tokensIn,
        uint256[] memory amountsIn,
        uint256 slippage,
        bytes memory data
    ) external returns (address[] memory tokensOut, uint256[] memory amountsOut);

    /**
     * @dev Swaps two tokens
     * @param source Source to request the swap. It depends on the Swap Connector attached to a Smart Vault.
     * @param tokenIn Token being sent
     * @param tokenOut Token being received
     * @param amountIn Amount of tokenIn being swapped
     * @param limitType Swap limit to be applied: slippage or min amount out
     * @param limitAmount Amount of the swap limit to be applied depending on limitType
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return amountOut Received amount of tokens out
     */
    function swap(
        uint8 source,
        address tokenIn,
        address tokenOut,
        uint256 amountIn,
        SwapLimit limitType,
        uint256 limitAmount,
        bytes memory data
    ) external returns (uint256 amountOut);

    /**
     * @dev Bridge assets to another chain
     * @param source Source to request the bridge. It depends on the Bridge Connector attached to a Smart Vault.
     * @param chainId ID of the destination chain
     * @param token Address of the token to be bridged
     * @param amount Amount of tokens to be bridged
     * @param limitType Swap limit to be applied: slippage or min amount out
     * @param limitAmount Amount of the swap limit to be applied depending on limitType
     * @param recipient Address that will receive the tokens on the destination chain
     * @param data Extra data that may enable or not different behaviors depending on the implementation
     * @return bridged Amount requested to be bridged after fees
     */
    function bridge(
        uint8 source,
        uint256 chainId,
        address token,
        uint256 amount,
        BridgeLimit limitType,
        uint256 limitAmount,
        address recipient,
        bytes memory data
    ) external returns (uint256 bridged);
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity >=0.8.0;

import '@mimic-fi/v2-registry/contracts/implementations/IImplementation.sol';

/**
 * @title ISwapConnector
 * @dev Swap Connector interface to perform token swaps. It must follow the IImplementation interface.
 */
interface ISwapConnector is IImplementation {
    /**
     * @dev Enum identifying the sources proposed: Uniswap V2, Uniswap V3, Balancer V2, Paraswap V5, 1inch V5, and Hop.
     */
    enum Source {
        UniswapV2,
        UniswapV3,
        BalancerV2,
        ParaswapV5,
        OneInchV5,
        Hop
    }

    /**
     * @dev Swaps two tokens
     * @param source Source to execute the requested swap
     * @param tokenIn Token being sent
     * @param tokenOut Token being received
     * @param amountIn Amount of tokenIn being swapped
     * @param minAmountOut Minimum amount of tokenOut willing to receive
     * @param data Encoded data to specify different swap parameters depending on the source picked
     */
    function swap(
        uint8 source,
        address tokenIn,
        address tokenOut,
        uint256 amountIn,
        uint256 minAmountOut,
        bytes memory data
    ) external returns (uint256 amountOut);
}

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

pragma solidity ^0.8.2;

import "../../utils/Address.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!Address.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
     * initialization step. This is essential to configure modules that are added through upgrades and that require
     * initialization.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@mimic-fi/v2-swap-connector/contracts/ISwapConnector.sol';

import './BaseSwapper.sol';

contract ParaswapSwapper is BaseSwapper {
    // Base gas amount charged to cover gas payment
    uint256 public constant override BASE_GAS = 46e3;

    constructor(address admin, address registry) BaseSwapper(admin, registry) {
        // solhint-disable-previous-line no-empty-blocks
    }

    function call(
        address tokenIn,
        uint256 amountIn,
        uint256 minAmountOut,
        uint256 expectedAmountOut,
        uint256 deadline,
        bytes memory data,
        bytes memory sig
    ) external auth nonReentrant redeemGas(tokenOut) {
        _validateToken(tokenIn);
        _validateThreshold(tokenOut, minAmountOut);
        _validateSlippage(tokenIn, minAmountOut, expectedAmountOut);
        _validateSig(tokenIn, amountIn, minAmountOut, expectedAmountOut, deadline, data, sig);

        smartVault.swap(
            uint8(ISwapConnector.Source.ParaswapV5),
            tokenIn,
            tokenOut,
            amountIn,
            ISmartVault.SwapLimit.MinAmountOut,
            minAmountOut,
            data
        );

        emit Executed();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@openzeppelin/contracts/token/ERC20/IERC20.sol';

import '@mimic-fi/v2-helpers/contracts/math/FixedPoint.sol';
import '@mimic-fi/v2-helpers/contracts/utils/Denominations.sol';

import './BaseAction.sol';

/**
 * @title RelayedAction
 * @dev Action that offers a relayed mechanism to allow reimbursing tx costs after execution in any ERC20 token.
 * This type of action at least require having withdraw permissions from the Smart Vault tied to it.
 */
abstract contract RelayedAction is BaseAction {
    using FixedPoint for uint256;

    // Base gas amount charged to cover default amounts
    // solhint-disable-next-line func-name-mixedcase
    function BASE_GAS() external view virtual returns (uint256);

    // Note to be used to mark tx cost payments
    bytes private constant REDEEM_GAS_NOTE = bytes('RELAYER');

    // Internal variable used to allow a better developer experience to reimburse tx gas cost
    uint256 private _initialGas;

    // Gas price limit expressed in the native token, if surpassed it wont relay the transaction
    uint256 public gasPriceLimit;

    // Total transaction cost limit expressed in the native token, if surpassed it wont relay the transaction
    uint256 public txCostLimit;

    // List of allowed relayers indexed by address
    mapping (address => bool) public isRelayer;

    /**
     * @dev Emitted every time the relayers list is changed
     */
    event RelayerSet(address indexed relayer, bool allowed);

    /**
     * @dev Emitted every time the relayer limits are set
     */
    event LimitsSet(uint256 gasPriceLimit, uint256 txCostLimit);

    /**
     * @dev Modifier that can be used to reimburse the gas cost of the tagged function paying in a specific token
     */
    modifier redeemGas(address token) {
        _initRelayedTx();
        _;
        _payRelayedTx(token);
    }

    /**
     * @dev Sets a relayer address. Sender must be authorized.
     * @param relayer Address of the relayer to be set
     * @param allowed Whether it should be allowed or not
     */
    function setRelayer(address relayer, bool allowed) external auth {
        isRelayer[relayer] = allowed;
        emit RelayerSet(relayer, allowed);
    }

    /**
     * @dev Sets the relayer limits. Sender must be authorized.
     * @param _gasPriceLimit New gas price limit to be set
     * @param _txCostLimit New total cost limit to be set
     */
    function setLimits(uint256 _gasPriceLimit, uint256 _txCostLimit) external auth {
        gasPriceLimit = _gasPriceLimit;
        txCostLimit = _txCostLimit;
        emit LimitsSet(_gasPriceLimit, _txCostLimit);
    }

    /**
     * @dev Internal init hook used for relayed txs. It checks tx limit validations only when the sender is a relayer.
     */
    function _initRelayedTx() internal {
        if (!isRelayer[msg.sender]) return;
        _initialGas = gasleft();
        uint256 limit = gasPriceLimit;
        require(limit == 0 || tx.gasprice <= limit, 'GAS_PRICE_ABOVE_LIMIT');
    }

    /**
     * @dev Internal function to pay for a relayed tx. Only when the sender is marked as a relayer.
     * @param token Address of the token to use in order to pay the tx cost
     * @return Amount of tokens paid to reimburse the tx cost
     */
    function _payRelayedTx(address token) internal returns (uint256) {
        (bool success, uint256 price) = _tryGetNativeTokenPriceIn(token);
        if (success) return _payRelayedTx(token, price);
        delete _initialGas;
        return 0;
    }

    /**
     * @dev Internal after call hook where tx cost is reimbursed. Only when the sender is marked as a relayer.
     * @param token Address of the token to use in order to pay the tx cost
     * @param price Price of the native token expressed in the given token quote
     * @return Amount of tokens paid to reimburse the tx cost
     */
    function _payRelayedTx(address token, uint256 price) internal returns (uint256) {
        if (!isRelayer[msg.sender]) return 0;
        require(_initialGas > 0, 'RELAYED_TX_NOT_INITIALIZED');

        uint256 limit = txCostLimit;
        uint256 totalGas = _initialGas - gasleft();
        uint256 totalCostNative = (totalGas + RelayedAction(this).BASE_GAS()) * tx.gasprice;
        require(limit == 0 || totalCostNative <= limit, 'TX_COST_ABOVE_LIMIT');

        // Total cost is rounded down to make sure we always match at least the threshold
        uint256 totalCostToken = totalCostNative.mulDown(price);
        smartVault.withdraw(token, totalCostToken, smartVault.feeCollector(), REDEEM_GAS_NOTE);

        delete _initialGas;
        return totalCostToken;
    }

    /**
     * @dev Tries getting the price of the native token quoted in a another token
     * @param token Address of the token to quote the native token in
     * @return success Whether the price query to the smart vault succeeded or not
     * @return price The price fetched or zero if the query didn't succeed
     */
    function _tryGetNativeTokenPriceIn(address token) internal view virtual returns (bool success, uint256 price) {
        if (_isWrappedOrNativeToken(token)) return (true, FixedPoint.ONE);
        try smartVault.getPrice(smartVault.wrappedNativeToken(), token) returns (uint256 result) {
            return (true, result);
        } catch {
            return (false, 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    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));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    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");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    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");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_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) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @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] = _HEX_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: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import '@mimic-fi/v2-helpers/contracts/math/FixedPoint.sol';

import './BaseAction.sol';

/**
 * @title TokenThresholdAction
 * @dev Action that offers a token threshold limit. It can be used for minimum swap amounts, or minimum withdrawal
 * amounts, etc. This type of action does not require any specific permission on the Smart Vault.
 */
abstract contract TokenThresholdAction is BaseAction {
    using FixedPoint for uint256;

    address public thresholdToken;
    uint256 public thresholdAmount;

    event ThresholdSet(address indexed token, uint256 amount);

    /**
     * @dev Sets a new threshold configuration. Sender must be authorized.
     * @param token New token threshold to be set
     * @param amount New amount threshold to be set
     */
    function setThreshold(address token, uint256 amount) external auth {
        thresholdToken = token;
        thresholdAmount = amount;
        emit ThresholdSet(token, amount);
    }

    /**
     * @dev Internal function to check the set threshold
     * @param token Token address of the given amount to evaluate the threshold
     * @param amount Amount of tokens to validate the threshold
     */
    function _passesThreshold(address token, uint256 amount) internal view returns (bool) {
        uint256 price = smartVault.getPrice(_wrappedIfNative(token), thresholdToken);
        return _passesThreshold(amount, price);
    }

    /**
     * @dev Internal function to check the set threshold
     * @param amount Amount of tokens to validate the threshold
     * @param price Price of the given token amount quoted in the threshold token
     */
    function _passesThreshold(uint256 amount, uint256 price) internal view returns (bool) {
        // Result balance is rounded down to make sure we always match at least the threshold
        return amount.mulDown(price) >= thresholdAmount;
    }

    /**
     * @dev Internal function to validate the set threshold
     * @param token Token address of the given amount to evaluate the threshold
     * @param amount Amount of tokens to validate the threshold
     */
    function _validateThreshold(address token, uint256 amount) internal view {
        require(_passesThreshold(token, amount), 'MIN_THRESHOLD_NOT_MET');
    }

    /**
     * @dev Internal function to validate the set threshold
     * @param amount Amount of tokens to validate the threshold
     * @param price Price of the given token amount quoted in the threshold token
     */
    function _validateThreshold(uint256 amount, uint256 price) internal view {
        require(_passesThreshold(amount, price), 'MIN_THRESHOLD_NOT_MET');
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

/**
 * @title UncheckedMath
 * @dev Math library to perform unchecked operations
 */
library UncheckedMath {
    /**
     * @dev Unsafely adds two unsigned integers
     */
    function uncheckedAdd(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            return a + b;
        }
    }

    /**
     * @dev Unsafely subtracts two unsigned integers
     */
    function uncheckedSub(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            return a - b;
        }
    }

    /**
     * @dev Unsafely multiplies two unsigned integers
     */
    function uncheckedMul(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            return a * b;
        }
    }

    /**
     * @dev Unsafely multiplies two signed integers
     */
    function uncheckedMul(int256 a, int256 b) internal pure returns (int256) {
        unchecked {
            return a * b;
        }
    }

    /**
     * @dev Unsafely divides two unsigned integers
     */
    function uncheckedDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            return a / b;
        }
    }
}

// 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);
}

{
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