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// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { BaseTransfersNative } from "../../../base/BaseTransfersNative/v1/BaseTransfersNative.sol";
import {
    WETH9NativeWrapper,
    BaseNativeWrapperConfig
} from "../../../modules/native-asset-wrappers/WETH9NativeWrapper.sol";
import { SwapPayload } from "../../../base/BaseSwap.sol";
import { DefinitiveAssets, IERC20 } from "../../../core/libraries/DefinitiveAssets.sol";
import {
    CoreAccessControlConfig,
    CoreSwapConfig,
    CoreFeesConfig,
    LLSDStrategy,
    LLSDStrategyConfig
} from "../../../modules/LLSDStrategy/v1/LLSDStrategy.sol";
import { BalancerFlashloanBase } from "../../../protocols/balancer/BalancerFlashloanBase.sol";
import { CompoundV3 } from "../Compound/CompoundV3.sol";

// solhint-disable-next-line contract-name-camelcase
contract LLSD_EthereumCompoundV3Balancer_wstETH_WETH is
    LLSDStrategy,
    BaseTransfersNative,
    WETH9NativeWrapper,
    BalancerFlashloanBase,
    CompoundV3
{
    using DefinitiveAssets for IERC20;

    /// @dev Compound V3 Mainnet Pool Address
    address public constant COMPOUND_POOL = 0xA17581A9E3356d9A858b789D68B4d866e593aE94;

    constructor(
        BaseNativeWrapperConfig memory baseNativeWrapperConfig,
        CoreAccessControlConfig memory coreAccessControlConfig,
        CoreSwapConfig memory coreSwapConfig,
        CoreFeesConfig memory coreFeesConfig
    )
        /// @dev Compound V3 Mainnet Pool Address
        CompoundV3(COMPOUND_POOL)
        LLSDStrategy(
            coreAccessControlConfig,
            coreSwapConfig,
            coreFeesConfig,
            LLSDStrategyConfig(
                /// @dev STAKING_TOKEN: WETH
                0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2,
                /// @dev STAKED_TOKEN: wstETH
                0x7f39C581F595B53c5cb19bD0b3f8dA6c935E2Ca0
            )
        )
        WETH9NativeWrapper(baseNativeWrapperConfig)
    {}

    function enter(
        uint256 flashloanAmount,
        SwapPayload calldata swapPayload,
        uint256 maxLTV
    ) external onlyWhitelisted stopGuarded nonReentrant enforceMaxLTV(maxLTV) emitEvent(FlashLoanContextType.ENTER) {
        EnterContext memory ctx = EnterContext(flashloanAmount, swapPayload, maxLTV);

        return
            flashloanAmount == 0
                ? _enterContinue(abi.encode(ctx))
                : initiateFlashLoan(
                    STAKING_TOKEN(),
                    flashloanAmount,
                    abi.encode(FlashLoanContextType.ENTER, abi.encode(ctx))
                );
    }

    function exit(
        uint256 flashloanAmount,
        uint256 repayAmount,
        uint256 decollateralizeAmount,
        SwapPayload calldata swapPayload,
        uint256 maxLTV
    ) external onlyWhitelisted stopGuarded nonReentrant enforceMaxLTV(maxLTV) emitEvent(FlashLoanContextType.EXIT) {
        ExitContext memory ctx = ExitContext(flashloanAmount, repayAmount, decollateralizeAmount, swapPayload, maxLTV);

        return
            flashloanAmount == 0
                ? _exitContinue(abi.encode(ctx))
                : initiateFlashLoan(
                    STAKING_TOKEN(),
                    flashloanAmount,
                    abi.encode(FlashLoanContextType.EXIT, abi.encode(ctx))
                );
    }

    function getCollateralToDebtPrice() external view returns (uint256, uint256) {
        // Gets price of wstETH in ETH
        (uint256 stakedAssetPriceETH, uint256 stakedAssetPricePrecision) = _getOraclePrice(STAKED_TOKEN());

        // Returns reciprocal of wstETH price to get WETH price in wstETH
        return (1e18 / stakedAssetPriceETH, 1e18 / stakedAssetPricePrecision);
    }

    function getDebtAmount() public view override returns (uint256) {
        return _getTotalVariableDebt();
    }

    function getCollateralAmount() public view override returns (uint256) {
        return _getTotalCollateral(STAKED_TOKEN());
    }

    function getLTV() public view override returns (uint256) {
        return _getLTV(STAKED_TOKEN());
    }

    function onFlashLoanReceived(
        address, // token
        uint256, // amount
        uint256, // feeAmount
        bytes memory userData
    ) internal override {
        (FlashLoanContextType ctxType, bytes memory data) = abi.decode(userData, (FlashLoanContextType, bytes));

        if (ctxType == FlashLoanContextType.ENTER) {
            return _enterContinue(data);
        }

        if (ctxType == FlashLoanContextType.EXIT) {
            return _exitContinue(data);
        }
    }

    function _enterContinue(bytes memory contextData) internal {
        EnterContext memory context = abi.decode(contextData, (EnterContext));
        address mSTAKED_TOKEN = STAKED_TOKEN();

        // Swap in to staked asset
        if (context.swapPayload.amount > 0) {
            SwapPayload[] memory swapPayloads = new SwapPayload[](1);
            swapPayloads[0] = context.swapPayload;
            _swap(swapPayloads, mSTAKED_TOKEN);
        }

        // Supply dry balance of staked token
        _supply(DefinitiveAssets.getBalance(mSTAKED_TOKEN));

        // Borrow flashloan amount for repayment
        _borrow(context.flashloanAmount);
    }

    function _exitContinue(bytes memory contextData) internal {
        ExitContext memory context = abi.decode(contextData, (ExitContext));

        // Repay debt
        _repay(context.repayAmount);

        // Decollateralize
        _decollateralize(context.decollateralizeAmount);

        // Swap out of staked asset
        if (context.swapPayload.amount > 0) {
            SwapPayload[] memory swapPayloads = new SwapPayload[](1);
            swapPayloads[0] = context.swapPayload;
            _swap(swapPayloads, STAKING_TOKEN());
        }
    }

    function _borrow(uint256 amount) internal override {
        borrow(STAKING_TOKEN(), amount);
    }

    function _decollateralize(uint256 amount) internal override {
        decollateralize(STAKED_TOKEN(), amount);
    }

    function _repay(uint256 amount) internal override {
        uint256 debtAmount = getDebtAmount();
        repay(STAKING_TOKEN(), amount > debtAmount ? debtAmount : amount);
    }

    function _supply(uint256 amount) internal override {
        supply(STAKED_TOKEN(), amount);
    }
}

// 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 >=0.7.0 <0.9.0;

interface IAuthentication {
    /**
     * @dev Returns the action identifier associated with the external function described by `selector`.
     */
    function getActionId(bytes4 selector) external view returns (bytes32);
}

// 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 >=0.7.0 <0.9.0;

/**
 * @dev Interface for the SignatureValidator helper, used to support meta-transactions.
 */
interface ISignaturesValidator {
    /**
     * @dev Returns the EIP712 domain separator.
     */
    function getDomainSeparator() external view returns (bytes32);

    /**
     * @dev Returns the next nonce used by an address to sign messages.
     */
    function getNextNonce(address user) external view returns (uint256);
}

// 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 >=0.7.0 <0.9.0;

/**
 * @dev Interface for the TemporarilyPausable helper.
 */
interface ITemporarilyPausable {
    /**
     * @dev Emitted every time the pause state changes by `_setPaused`.
     */
    event PausedStateChanged(bool paused);

    /**
     * @dev Returns the current paused state.
     */
    function getPausedState()
        external
        view
        returns (
            bool paused,
            uint256 pauseWindowEndTime,
            uint256 bufferPeriodEndTime
        );
}

// 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 >=0.7.0 <0.9.0;

import "../openzeppelin/IERC20.sol";

/**
 * @dev Interface for WETH9.
 * See https://github.com/gnosis/canonical-weth/blob/0dd1ea3e295eef916d0c6223ec63141137d22d67/contracts/WETH9.sol
 */
interface IWETH is IERC20 {
    function deposit() external payable;

    function withdraw(uint256 amount) external;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.7.0 <0.9.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @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);
}

// 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 >=0.7.0 <0.9.0;

/**
 * @dev This is an empty interface used to represent either ERC20-conforming token contracts or ETH (using the zero
 * address sentinel value). We're just relying on the fact that `interface` can be used to declare new address-like
 * types.
 *
 * This concept is unrelated to a Pool's Asset Managers.
 */
interface IAsset {
    // solhint-disable-previous-line no-empty-blocks
}

// 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 >=0.7.0 <0.9.0;

interface IAuthorizer {
    /**
     * @dev Returns true if `account` can perform the action described by `actionId` in the contract `where`.
     */
    function canPerform(
        bytes32 actionId,
        address account,
        address where
    ) external view 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 >=0.7.0 <0.9.0;

// Inspired by Aave Protocol's IFlashLoanReceiver.

import "../solidity-utils/openzeppelin/IERC20.sol";

interface IFlashLoanRecipient {
    /**
     * @dev When `flashLoan` is called on the Vault, it invokes the `receiveFlashLoan` hook on the recipient.
     *
     * At the time of the call, the Vault will have transferred `amounts` for `tokens` to the recipient. Before this
     * call returns, the recipient must have transferred `amounts` plus `feeAmounts` for each token back to the
     * Vault, or else the entire flash loan will revert.
     *
     * `userData` is the same value passed in the `IVault.flashLoan` call.
     */
    function receiveFlashLoan(
        IERC20[] memory tokens,
        uint256[] memory amounts,
        uint256[] memory feeAmounts,
        bytes memory userData
    ) 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 >=0.7.0 <0.9.0;
pragma experimental ABIEncoderV2;

import "../solidity-utils/openzeppelin/IERC20.sol";

import "./IVault.sol";
import "./IAuthorizer.sol";

interface IProtocolFeesCollector {
    event SwapFeePercentageChanged(uint256 newSwapFeePercentage);
    event FlashLoanFeePercentageChanged(uint256 newFlashLoanFeePercentage);

    function withdrawCollectedFees(
        IERC20[] calldata tokens,
        uint256[] calldata amounts,
        address recipient
    ) external;

    function setSwapFeePercentage(uint256 newSwapFeePercentage) external;

    function setFlashLoanFeePercentage(uint256 newFlashLoanFeePercentage) external;

    function getSwapFeePercentage() external view returns (uint256);

    function getFlashLoanFeePercentage() external view returns (uint256);

    function getCollectedFeeAmounts(IERC20[] memory tokens) external view returns (uint256[] memory feeAmounts);

    function getAuthorizer() external view returns (IAuthorizer);

    function vault() external view returns (IVault);
}

// 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 experimental ABIEncoderV2;

import "../solidity-utils/openzeppelin/IERC20.sol";
import "../solidity-utils/helpers/IAuthentication.sol";
import "../solidity-utils/helpers/ISignaturesValidator.sol";
import "../solidity-utils/helpers/ITemporarilyPausable.sol";
import "../solidity-utils/misc/IWETH.sol";

import "./IAsset.sol";
import "./IAuthorizer.sol";
import "./IFlashLoanRecipient.sol";
import "./IProtocolFeesCollector.sol";

pragma solidity >=0.7.0 <0.9.0;

/**
 * @dev Full external interface for the Vault core contract - no external or public methods exist in the contract that
 * don't override one of these declarations.
 */
interface IVault is ISignaturesValidator, ITemporarilyPausable, IAuthentication {
    // Generalities about the Vault:
    //
    // - Whenever documentation refers to 'tokens', it strictly refers to ERC20-compliant token contracts. Tokens are
    // transferred out of the Vault by calling the `IERC20.transfer` function, and transferred in by calling
    // `IERC20.transferFrom`. In these cases, the sender must have previously allowed the Vault to use their tokens by
    // calling `IERC20.approve`. The only deviation from the ERC20 standard that is supported is functions not returning
    // a boolean value: in these scenarios, a non-reverting call is assumed to be successful.
    //
    // - All non-view functions in the Vault are non-reentrant: calling them while another one is mid-execution (e.g.
    // while execution control is transferred to a token contract during a swap) will result in a revert. View
    // functions can be called in a re-reentrant way, but doing so might cause them to return inconsistent results.
    // Contracts calling view functions in the Vault must make sure the Vault has not already been entered.
    //
    // - View functions revert if referring to either unregistered Pools, or unregistered tokens for registered Pools.

    // Authorizer
    //
    // Some system actions are permissioned, like setting and collecting protocol fees. This permissioning system exists
    // outside of the Vault in the Authorizer contract: the Vault simply calls the Authorizer to check if the caller
    // can perform a given action.

    /**
     * @dev Returns the Vault's Authorizer.
     */
    function getAuthorizer() external view returns (IAuthorizer);

    /**
     * @dev Sets a new Authorizer for the Vault. The caller must be allowed by the current Authorizer to do this.
     *
     * Emits an `AuthorizerChanged` event.
     */
    function setAuthorizer(IAuthorizer newAuthorizer) external;

    /**
     * @dev Emitted when a new authorizer is set by `setAuthorizer`.
     */
    event AuthorizerChanged(IAuthorizer indexed newAuthorizer);

    // Relayers
    //
    // Additionally, it is possible for an account to perform certain actions on behalf of another one, using their
    // Vault ERC20 allowance and Internal Balance. These accounts are said to be 'relayers' for these Vault functions,
    // and are expected to be smart contracts with sound authentication mechanisms. For an account to be able to wield
    // this power, two things must occur:
    //  - The Authorizer must grant the account the permission to be a relayer for the relevant Vault function. This
    //    means that Balancer governance must approve each individual contract to act as a relayer for the intended
    //    functions.
    //  - Each user must approve the relayer to act on their behalf.
    // This double protection means users cannot be tricked into approving malicious relayers (because they will not
    // have been allowed by the Authorizer via governance), nor can malicious relayers approved by a compromised
    // Authorizer or governance drain user funds, since they would also need to be approved by each individual user.

    /**
     * @dev Returns true if `user` has approved `relayer` to act as a relayer for them.
     */
    function hasApprovedRelayer(address user, address relayer) external view returns (bool);

    /**
     * @dev Allows `relayer` to act as a relayer for `sender` if `approved` is true, and disallows it otherwise.
     *
     * Emits a `RelayerApprovalChanged` event.
     */
    function setRelayerApproval(
        address sender,
        address relayer,
        bool approved
    ) external;

    /**
     * @dev Emitted every time a relayer is approved or disapproved by `setRelayerApproval`.
     */
    event RelayerApprovalChanged(address indexed relayer, address indexed sender, bool approved);

    // Internal Balance
    //
    // Users can deposit tokens into the Vault, where they are allocated to their Internal Balance, and later
    // transferred or withdrawn. It can also be used as a source of tokens when joining Pools, as a destination
    // when exiting them, and as either when performing swaps. This usage of Internal Balance results in greatly reduced
    // gas costs when compared to relying on plain ERC20 transfers, leading to large savings for frequent users.
    //
    // Internal Balance management features batching, which means a single contract call can be used to perform multiple
    // operations of different kinds, with different senders and recipients, at once.

    /**
     * @dev Returns `user`'s Internal Balance for a set of tokens.
     */
    function getInternalBalance(address user, IERC20[] memory tokens) external view returns (uint256[] memory);

    /**
     * @dev Performs a set of user balance operations, which involve Internal Balance (deposit, withdraw or transfer)
     * and plain ERC20 transfers using the Vault's allowance. This last feature is particularly useful for relayers, as
     * it lets integrators reuse a user's Vault allowance.
     *
     * For each operation, if the caller is not `sender`, it must be an authorized relayer for them.
     */
    function manageUserBalance(UserBalanceOp[] memory ops) external payable;

    /**
     * @dev Data for `manageUserBalance` operations, which include the possibility for ETH to be sent and received
     without manual WETH wrapping or unwrapping.
     */
    struct UserBalanceOp {
        UserBalanceOpKind kind;
        IAsset asset;
        uint256 amount;
        address sender;
        address payable recipient;
    }

    // There are four possible operations in `manageUserBalance`:
    //
    // - DEPOSIT_INTERNAL
    // Increases the Internal Balance of the `recipient` account by transferring tokens from the corresponding
    // `sender`. The sender must have allowed the Vault to use their tokens via `IERC20.approve()`.
    //
    // ETH can be used by passing the ETH sentinel value as the asset and forwarding ETH in the call: it will be wrapped
    // and deposited as WETH. Any ETH amount remaining will be sent back to the caller (not the sender, which is
    // relevant for relayers).
    //
    // Emits an `InternalBalanceChanged` event.
    //
    //
    // - WITHDRAW_INTERNAL
    // Decreases the Internal Balance of the `sender` account by transferring tokens to the `recipient`.
    //
    // ETH can be used by passing the ETH sentinel value as the asset. This will deduct WETH instead, unwrap it and send
    // it to the recipient as ETH.
    //
    // Emits an `InternalBalanceChanged` event.
    //
    //
    // - TRANSFER_INTERNAL
    // Transfers tokens from the Internal Balance of the `sender` account to the Internal Balance of `recipient`.
    //
    // Reverts if the ETH sentinel value is passed.
    //
    // Emits an `InternalBalanceChanged` event.
    //
    //
    // - TRANSFER_EXTERNAL
    // Transfers tokens from `sender` to `recipient`, using the Vault's ERC20 allowance. This is typically used by
    // relayers, as it lets them reuse a user's Vault allowance.
    //
    // Reverts if the ETH sentinel value is passed.
    //
    // Emits an `ExternalBalanceTransfer` event.

    enum UserBalanceOpKind { DEPOSIT_INTERNAL, WITHDRAW_INTERNAL, TRANSFER_INTERNAL, TRANSFER_EXTERNAL }

    /**
     * @dev Emitted when a user's Internal Balance changes, either from calls to `manageUserBalance`, or through
     * interacting with Pools using Internal Balance.
     *
     * Because Internal Balance works exclusively with ERC20 tokens, ETH deposits and withdrawals will use the WETH
     * address.
     */
    event InternalBalanceChanged(address indexed user, IERC20 indexed token, int256 delta);

    /**
     * @dev Emitted when a user's Vault ERC20 allowance is used by the Vault to transfer tokens to an external account.
     */
    event ExternalBalanceTransfer(IERC20 indexed token, address indexed sender, address recipient, uint256 amount);

    // Pools
    //
    // There are three specialization settings for Pools, which allow for cheaper swaps at the cost of reduced
    // functionality:
    //
    //  - General: no specialization, suited for all Pools. IGeneralPool is used for swap request callbacks, passing the
    // balance of all tokens in the Pool. These Pools have the largest swap costs (because of the extra storage reads),
    // which increase with the number of registered tokens.
    //
    //  - Minimal Swap Info: IMinimalSwapInfoPool is used instead of IGeneralPool, which saves gas by only passing the
    // balance of the two tokens involved in the swap. This is suitable for some pricing algorithms, like the weighted
    // constant product one popularized by Balancer V1. Swap costs are smaller compared to general Pools, and are
    // independent of the number of registered tokens.
    //
    //  - Two Token: only allows two tokens to be registered. This achieves the lowest possible swap gas cost. Like
    // minimal swap info Pools, these are called via IMinimalSwapInfoPool.

    enum PoolSpecialization { GENERAL, MINIMAL_SWAP_INFO, TWO_TOKEN }

    /**
     * @dev Registers the caller account as a Pool with a given specialization setting. Returns the Pool's ID, which
     * is used in all Pool-related functions. Pools cannot be deregistered, nor can the Pool's specialization be
     * changed.
     *
     * The caller is expected to be a smart contract that implements either `IGeneralPool` or `IMinimalSwapInfoPool`,
     * depending on the chosen specialization setting. This contract is known as the Pool's contract.
     *
     * Note that the same contract may register itself as multiple Pools with unique Pool IDs, or in other words,
     * multiple Pools may share the same contract.
     *
     * Emits a `PoolRegistered` event.
     */
    function registerPool(PoolSpecialization specialization) external returns (bytes32);

    /**
     * @dev Emitted when a Pool is registered by calling `registerPool`.
     */
    event PoolRegistered(bytes32 indexed poolId, address indexed poolAddress, PoolSpecialization specialization);

    /**
     * @dev Returns a Pool's contract address and specialization setting.
     */
    function getPool(bytes32 poolId) external view returns (address, PoolSpecialization);

    /**
     * @dev Registers `tokens` for the `poolId` Pool. Must be called by the Pool's contract.
     *
     * Pools can only interact with tokens they have registered. Users join a Pool by transferring registered tokens,
     * exit by receiving registered tokens, and can only swap registered tokens.
     *
     * Each token can only be registered once. For Pools with the Two Token specialization, `tokens` must have a length
     * of two, that is, both tokens must be registered in the same `registerTokens` call, and they must be sorted in
     * ascending order.
     *
     * The `tokens` and `assetManagers` arrays must have the same length, and each entry in these indicates the Asset
     * Manager for the corresponding token. Asset Managers can manage a Pool's tokens via `managePoolBalance`,
     * depositing and withdrawing them directly, and can even set their balance to arbitrary amounts. They are therefore
     * expected to be highly secured smart contracts with sound design principles, and the decision to register an
     * Asset Manager should not be made lightly.
     *
     * Pools can choose not to assign an Asset Manager to a given token by passing in the zero address. Once an Asset
     * Manager is set, it cannot be changed except by deregistering the associated token and registering again with a
     * different Asset Manager.
     *
     * Emits a `TokensRegistered` event.
     */
    function registerTokens(
        bytes32 poolId,
        IERC20[] memory tokens,
        address[] memory assetManagers
    ) external;

    /**
     * @dev Emitted when a Pool registers tokens by calling `registerTokens`.
     */
    event TokensRegistered(bytes32 indexed poolId, IERC20[] tokens, address[] assetManagers);

    /**
     * @dev Deregisters `tokens` for the `poolId` Pool. Must be called by the Pool's contract.
     *
     * Only registered tokens (via `registerTokens`) can be deregistered. Additionally, they must have zero total
     * balance. For Pools with the Two Token specialization, `tokens` must have a length of two, that is, both tokens
     * must be deregistered in the same `deregisterTokens` call.
     *
     * A deregistered token can be re-registered later on, possibly with a different Asset Manager.
     *
     * Emits a `TokensDeregistered` event.
     */
    function deregisterTokens(bytes32 poolId, IERC20[] memory tokens) external;

    /**
     * @dev Emitted when a Pool deregisters tokens by calling `deregisterTokens`.
     */
    event TokensDeregistered(bytes32 indexed poolId, IERC20[] tokens);

    /**
     * @dev Returns detailed information for a Pool's registered token.
     *
     * `cash` is the number of tokens the Vault currently holds for the Pool. `managed` is the number of tokens
     * withdrawn and held outside the Vault by the Pool's token Asset Manager. The Pool's total balance for `token`
     * equals the sum of `cash` and `managed`.
     *
     * Internally, `cash` and `managed` are stored using 112 bits. No action can ever cause a Pool's token `cash`,
     * `managed` or `total` balance to be greater than 2^112 - 1.
     *
     * `lastChangeBlock` is the number of the block in which `token`'s total balance was last modified (via either a
     * join, exit, swap, or Asset Manager update). This value is useful to avoid so-called 'sandwich attacks', for
     * example when developing price oracles. A change of zero (e.g. caused by a swap with amount zero) is considered a
     * change for this purpose, and will update `lastChangeBlock`.
     *
     * `assetManager` is the Pool's token Asset Manager.
     */
    function getPoolTokenInfo(bytes32 poolId, IERC20 token)
        external
        view
        returns (
            uint256 cash,
            uint256 managed,
            uint256 lastChangeBlock,
            address assetManager
        );

    /**
     * @dev Returns a Pool's registered tokens, the total balance for each, and the latest block when *any* of
     * the tokens' `balances` changed.
     *
     * The order of the `tokens` array is the same order that will be used in `joinPool`, `exitPool`, as well as in all
     * Pool hooks (where applicable). Calls to `registerTokens` and `deregisterTokens` may change this order.
     *
     * If a Pool only registers tokens once, and these are sorted in ascending order, they will be stored in the same
     * order as passed to `registerTokens`.
     *
     * Total balances include both tokens held by the Vault and those withdrawn by the Pool's Asset Managers. These are
     * the amounts used by joins, exits and swaps. For a detailed breakdown of token balances, use `getPoolTokenInfo`
     * instead.
     */
    function getPoolTokens(bytes32 poolId)
        external
        view
        returns (
            IERC20[] memory tokens,
            uint256[] memory balances,
            uint256 lastChangeBlock
        );

    /**
     * @dev Called by users to join a Pool, which transfers tokens from `sender` into the Pool's balance. This will
     * trigger custom Pool behavior, which will typically grant something in return to `recipient` - often tokenized
     * Pool shares.
     *
     * If the caller is not `sender`, it must be an authorized relayer for them.
     *
     * The `assets` and `maxAmountsIn` arrays must have the same length, and each entry indicates the maximum amount
     * to send for each asset. The amounts to send are decided by the Pool and not the Vault: it just enforces
     * these maximums.
     *
     * If joining a Pool that holds WETH, it is possible to send ETH directly: the Vault will do the wrapping. To enable
     * this mechanism, the IAsset sentinel value (the zero address) must be passed in the `assets` array instead of the
     * WETH address. Note that it is not possible to combine ETH and WETH in the same join. Any excess ETH will be sent
     * back to the caller (not the sender, which is important for relayers).
     *
     * `assets` must have the same length and order as the array returned by `getPoolTokens`. This prevents issues when
     * interacting with Pools that register and deregister tokens frequently. If sending ETH however, the array must be
     * sorted *before* replacing the WETH address with the ETH sentinel value (the zero address), which means the final
     * `assets` array might not be sorted. Pools with no registered tokens cannot be joined.
     *
     * If `fromInternalBalance` is true, the caller's Internal Balance will be preferred: ERC20 transfers will only
     * be made for the difference between the requested amount and Internal Balance (if any). Note that ETH cannot be
     * withdrawn from Internal Balance: attempting to do so will trigger a revert.
     *
     * This causes the Vault to call the `IBasePool.onJoinPool` hook on the Pool's contract, where Pools implement
     * their own custom logic. This typically requires additional information from the user (such as the expected number
     * of Pool shares). This can be encoded in the `userData` argument, which is ignored by the Vault and passed
     * directly to the Pool's contract, as is `recipient`.
     *
     * Emits a `PoolBalanceChanged` event.
     */
    function joinPool(
        bytes32 poolId,
        address sender,
        address recipient,
        JoinPoolRequest memory request
    ) external payable;

    struct JoinPoolRequest {
        IAsset[] assets;
        uint256[] maxAmountsIn;
        bytes userData;
        bool fromInternalBalance;
    }

    /**
     * @dev Called by users to exit a Pool, which transfers tokens from the Pool's balance to `recipient`. This will
     * trigger custom Pool behavior, which will typically ask for something in return from `sender` - often tokenized
     * Pool shares. The amount of tokens that can be withdrawn is limited by the Pool's `cash` balance (see
     * `getPoolTokenInfo`).
     *
     * If the caller is not `sender`, it must be an authorized relayer for them.
     *
     * The `tokens` and `minAmountsOut` arrays must have the same length, and each entry in these indicates the minimum
     * token amount to receive for each token contract. The amounts to send are decided by the Pool and not the Vault:
     * it just enforces these minimums.
     *
     * If exiting a Pool that holds WETH, it is possible to receive ETH directly: the Vault will do the unwrapping. To
     * enable this mechanism, the IAsset sentinel value (the zero address) must be passed in the `assets` array instead
     * of the WETH address. Note that it is not possible to combine ETH and WETH in the same exit.
     *
     * `assets` must have the same length and order as the array returned by `getPoolTokens`. This prevents issues when
     * interacting with Pools that register and deregister tokens frequently. If receiving ETH however, the array must
     * be sorted *before* replacing the WETH address with the ETH sentinel value (the zero address), which means the
     * final `assets` array might not be sorted. Pools with no registered tokens cannot be exited.
     *
     * If `toInternalBalance` is true, the tokens will be deposited to `recipient`'s Internal Balance. Otherwise,
     * an ERC20 transfer will be performed. Note that ETH cannot be deposited to Internal Balance: attempting to
     * do so will trigger a revert.
     *
     * `minAmountsOut` is the minimum amount of tokens the user expects to get out of the Pool, for each token in the
     * `tokens` array. This array must match the Pool's registered tokens.
     *
     * This causes the Vault to call the `IBasePool.onExitPool` hook on the Pool's contract, where Pools implement
     * their own custom logic. This typically requires additional information from the user (such as the expected number
     * of Pool shares to return). This can be encoded in the `userData` argument, which is ignored by the Vault and
     * passed directly to the Pool's contract.
     *
     * Emits a `PoolBalanceChanged` event.
     */
    function exitPool(
        bytes32 poolId,
        address sender,
        address payable recipient,
        ExitPoolRequest memory request
    ) external;

    struct ExitPoolRequest {
        IAsset[] assets;
        uint256[] minAmountsOut;
        bytes userData;
        bool toInternalBalance;
    }

    /**
     * @dev Emitted when a user joins or exits a Pool by calling `joinPool` or `exitPool`, respectively.
     */
    event PoolBalanceChanged(
        bytes32 indexed poolId,
        address indexed liquidityProvider,
        IERC20[] tokens,
        int256[] deltas,
        uint256[] protocolFeeAmounts
    );

    enum PoolBalanceChangeKind { JOIN, EXIT }

    // Swaps
    //
    // Users can swap tokens with Pools by calling the `swap` and `batchSwap` functions. To do this,
    // they need not trust Pool contracts in any way: all security checks are made by the Vault. They must however be
    // aware of the Pools' pricing algorithms in order to estimate the prices Pools will quote.
    //
    // The `swap` function executes a single swap, while `batchSwap` can perform multiple swaps in sequence.
    // In each individual swap, tokens of one kind are sent from the sender to the Pool (this is the 'token in'),
    // and tokens of another kind are sent from the Pool to the recipient in exchange (this is the 'token out').
    // More complex swaps, such as one token in to multiple tokens out can be achieved by batching together
    // individual swaps.
    //
    // There are two swap kinds:
    //  - 'given in' swaps, where the amount of tokens in (sent to the Pool) is known, and the Pool determines (via the
    // `onSwap` hook) the amount of tokens out (to send to the recipient).
    //  - 'given out' swaps, where the amount of tokens out (received from the Pool) is known, and the Pool determines
    // (via the `onSwap` hook) the amount of tokens in (to receive from the sender).
    //
    // Additionally, it is possible to chain swaps using a placeholder input amount, which the Vault replaces with
    // the calculated output of the previous swap. If the previous swap was 'given in', this will be the calculated
    // tokenOut amount. If the previous swap was 'given out', it will use the calculated tokenIn amount. These extended
    // swaps are known as 'multihop' swaps, since they 'hop' through a number of intermediate tokens before arriving at
    // the final intended token.
    //
    // In all cases, tokens are only transferred in and out of the Vault (or withdrawn from and deposited into Internal
    // Balance) after all individual swaps have been completed, and the net token balance change computed. This makes
    // certain swap patterns, such as multihops, or swaps that interact with the same token pair in multiple Pools, cost
    // much less gas than they would otherwise.
    //
    // It also means that under certain conditions it is possible to perform arbitrage by swapping with multiple
    // Pools in a way that results in net token movement out of the Vault (profit), with no tokens being sent in (only
    // updating the Pool's internal accounting).
    //
    // To protect users from front-running or the market changing rapidly, they supply a list of 'limits' for each token
    // involved in the swap, where either the maximum number of tokens to send (by passing a positive value) or the
    // minimum amount of tokens to receive (by passing a negative value) is specified.
    //
    // Additionally, a 'deadline' timestamp can also be provided, forcing the swap to fail if it occurs after
    // this point in time (e.g. if the transaction failed to be included in a block promptly).
    //
    // If interacting with Pools that hold WETH, it is possible to both send and receive ETH directly: the Vault will do
    // the wrapping and unwrapping. To enable this mechanism, the IAsset sentinel value (the zero address) must be
    // passed in the `assets` array instead of the WETH address. Note that it is possible to combine ETH and WETH in the
    // same swap. Any excess ETH will be sent back to the caller (not the sender, which is relevant for relayers).
    //
    // Finally, Internal Balance can be used when either sending or receiving tokens.

    enum SwapKind { GIVEN_IN, GIVEN_OUT }

    /**
     * @dev Performs a swap with a single Pool.
     *
     * If the swap is 'given in' (the number of tokens to send to the Pool is known), it returns the amount of tokens
     * taken from the Pool, which must be greater than or equal to `limit`.
     *
     * If the swap is 'given out' (the number of tokens to take from the Pool is known), it returns the amount of tokens
     * sent to the Pool, which must be less than or equal to `limit`.
     *
     * Internal Balance usage and the recipient are determined by the `funds` struct.
     *
     * Emits a `Swap` event.
     */
    function swap(
        SingleSwap memory singleSwap,
        FundManagement memory funds,
        uint256 limit,
        uint256 deadline
    ) external payable returns (uint256);

    /**
     * @dev Data for a single swap executed by `swap`. `amount` is either `amountIn` or `amountOut` depending on
     * the `kind` value.
     *
     * `assetIn` and `assetOut` are either token addresses, or the IAsset sentinel value for ETH (the zero address).
     * Note that Pools never interact with ETH directly: it will be wrapped to or unwrapped from WETH by the Vault.
     *
     * The `userData` field is ignored by the Vault, but forwarded to the Pool in the `onSwap` hook, and may be
     * used to extend swap behavior.
     */
    struct SingleSwap {
        bytes32 poolId;
        SwapKind kind;
        IAsset assetIn;
        IAsset assetOut;
        uint256 amount;
        bytes userData;
    }

    /**
     * @dev Performs a series of swaps with one or multiple Pools. In each individual swap, the caller determines either
     * the amount of tokens sent to or received from the Pool, depending on the `kind` value.
     *
     * Returns an array with the net Vault asset balance deltas. Positive amounts represent tokens (or ETH) sent to the
     * Vault, and negative amounts represent tokens (or ETH) sent by the Vault. Each delta corresponds to the asset at
     * the same index in the `assets` array.
     *
     * Swaps are executed sequentially, in the order specified by the `swaps` array. Each array element describes a
     * Pool, the token to be sent to this Pool, the token to receive from it, and an amount that is either `amountIn` or
     * `amountOut` depending on the swap kind.
     *
     * Multihop swaps can be executed by passing an `amount` value of zero for a swap. This will cause the amount in/out
     * of the previous swap to be used as the amount in for the current one. In a 'given in' swap, 'tokenIn' must equal
     * the previous swap's `tokenOut`. For a 'given out' swap, `tokenOut` must equal the previous swap's `tokenIn`.
     *
     * The `assets` array contains the addresses of all assets involved in the swaps. These are either token addresses,
     * or the IAsset sentinel value for ETH (the zero address). Each entry in the `swaps` array specifies tokens in and
     * out by referencing an index in `assets`. Note that Pools never interact with ETH directly: it will be wrapped to
     * or unwrapped from WETH by the Vault.
     *
     * Internal Balance usage, sender, and recipient are determined by the `funds` struct. The `limits` array specifies
     * the minimum or maximum amount of each token the vault is allowed to transfer.
     *
     * `batchSwap` can be used to make a single swap, like `swap` does, but doing so requires more gas than the
     * equivalent `swap` call.
     *
     * Emits `Swap` events.
     */
    function batchSwap(
        SwapKind kind,
        BatchSwapStep[] memory swaps,
        IAsset[] memory assets,
        FundManagement memory funds,
        int256[] memory limits,
        uint256 deadline
    ) external payable returns (int256[] memory);

    /**
     * @dev Data for each individual swap executed by `batchSwap`. The asset in and out fields are indexes into the
     * `assets` array passed to that function, and ETH assets are converted to WETH.
     *
     * If `amount` is zero, the multihop mechanism is used to determine the actual amount based on the amount in/out
     * from the previous swap, depending on the swap kind.
     *
     * The `userData` field is ignored by the Vault, but forwarded to the Pool in the `onSwap` hook, and may be
     * used to extend swap behavior.
     */
    struct BatchSwapStep {
        bytes32 poolId;
        uint256 assetInIndex;
        uint256 assetOutIndex;
        uint256 amount;
        bytes userData;
    }

    /**
     * @dev Emitted for each individual swap performed by `swap` or `batchSwap`.
     */
    event Swap(
        bytes32 indexed poolId,
        IERC20 indexed tokenIn,
        IERC20 indexed tokenOut,
        uint256 amountIn,
        uint256 amountOut
    );

    /**
     * @dev All tokens in a swap are either sent from the `sender` account to the Vault, or from the Vault to the
     * `recipient` account.
     *
     * If the caller is not `sender`, it must be an authorized relayer for them.
     *
     * If `fromInternalBalance` is true, the `sender`'s Internal Balance will be preferred, performing an ERC20
     * transfer for the difference between the requested amount and the User's Internal Balance (if any). The `sender`
     * must have allowed the Vault to use their tokens via `IERC20.approve()`. This matches the behavior of
     * `joinPool`.
     *
     * If `toInternalBalance` is true, tokens will be deposited to `recipient`'s internal balance instead of
     * transferred. This matches the behavior of `exitPool`.
     *
     * Note that ETH cannot be deposited to or withdrawn from Internal Balance: attempting to do so will trigger a
     * revert.
     */
    struct FundManagement {
        address sender;
        bool fromInternalBalance;
        address payable recipient;
        bool toInternalBalance;
    }

    /**
     * @dev Simulates a call to `batchSwap`, returning an array of Vault asset deltas. Calls to `swap` cannot be
     * simulated directly, but an equivalent `batchSwap` call can and will yield the exact same result.
     *
     * Each element in the array corresponds to the asset at the same index, and indicates the number of tokens (or ETH)
     * the Vault would take from the sender (if positive) or send to the recipient (if negative). The arguments it
     * receives are the same that an equivalent `batchSwap` call would receive.
     *
     * Unlike `batchSwap`, this function performs no checks on the sender or recipient field in the `funds` struct.
     * This makes it suitable to be called by off-chain applications via eth_call without needing to hold tokens,
     * approve them for the Vault, or even know a user's address.
     *
     * Note that this function is not 'view' (due to implementation details): the client code must explicitly execute
     * eth_call instead of eth_sendTransaction.
     */
    function queryBatchSwap(
        SwapKind kind,
        BatchSwapStep[] memory swaps,
        IAsset[] memory assets,
        FundManagement memory funds
    ) external returns (int256[] memory assetDeltas);

    // Flash Loans

    /**
     * @dev Performs a 'flash loan', sending tokens to `recipient`, executing the `receiveFlashLoan` hook on it,
     * and then reverting unless the tokens plus a proportional protocol fee have been returned.
     *
     * The `tokens` and `amounts` arrays must have the same length, and each entry in these indicates the loan amount
     * for each token contract. `tokens` must be sorted in ascending order.
     *
     * The 'userData' field is ignored by the Vault, and forwarded as-is to `recipient` as part of the
     * `receiveFlashLoan` call.
     *
     * Emits `FlashLoan` events.
     */
    function flashLoan(
        IFlashLoanRecipient recipient,
        IERC20[] memory tokens,
        uint256[] memory amounts,
        bytes memory userData
    ) external;

    /**
     * @dev Emitted for each individual flash loan performed by `flashLoan`.
     */
    event FlashLoan(IFlashLoanRecipient indexed recipient, IERC20 indexed token, uint256 amount, uint256 feeAmount);

    // Asset Management
    //
    // Each token registered for a Pool can be assigned an Asset Manager, which is able to freely withdraw the Pool's
    // tokens from the Vault, deposit them, or assign arbitrary values to its `managed` balance (see
    // `getPoolTokenInfo`). This makes them extremely powerful and dangerous. Even if an Asset Manager only directly
    // controls one of the tokens in a Pool, a malicious manager could set that token's balance to manipulate the
    // prices of the other tokens, and then drain the Pool with swaps. The risk of using Asset Managers is therefore
    // not constrained to the tokens they are managing, but extends to the entire Pool's holdings.
    //
    // However, a properly designed Asset Manager smart contract can be safely used for the Pool's benefit,
    // for example by lending unused tokens out for interest, or using them to participate in voting protocols.
    //
    // This concept is unrelated to the IAsset interface.

    /**
     * @dev Performs a set of Pool balance operations, which may be either withdrawals, deposits or updates.
     *
     * Pool Balance management features batching, which means a single contract call can be used to perform multiple
     * operations of different kinds, with different Pools and tokens, at once.
     *
     * For each operation, the caller must be registered as the Asset Manager for `token` in `poolId`.
     */
    function managePoolBalance(PoolBalanceOp[] memory ops) external;

    struct PoolBalanceOp {
        PoolBalanceOpKind kind;
        bytes32 poolId;
        IERC20 token;
        uint256 amount;
    }

    /**
     * Withdrawals decrease the Pool's cash, but increase its managed balance, leaving the total balance unchanged.
     *
     * Deposits increase the Pool's cash, but decrease its managed balance, leaving the total balance unchanged.
     *
     * Updates don't affect the Pool's cash balance, but because the managed balance changes, it does alter the total.
     * The external amount can be either increased or decreased by this call (i.e., reporting a gain or a loss).
     */
    enum PoolBalanceOpKind { WITHDRAW, DEPOSIT, UPDATE }

    /**
     * @dev Emitted when a Pool's token Asset Manager alters its balance via `managePoolBalance`.
     */
    event PoolBalanceManaged(
        bytes32 indexed poolId,
        address indexed assetManager,
        IERC20 indexed token,
        int256 cashDelta,
        int256 managedDelta
    );

    // Protocol Fees
    //
    // Some operations cause the Vault to collect tokens in the form of protocol fees, which can then be withdrawn by
    // permissioned accounts.
    //
    // There are two kinds of protocol fees:
    //
    //  - flash loan fees: charged on all flash loans, as a percentage of the amounts lent.
    //
    //  - swap fees: a percentage of the fees charged by Pools when performing swaps. For a number of reasons, including
    // swap gas costs and interface simplicity, protocol swap fees are not charged on each individual swap. Rather,
    // Pools are expected to keep track of how much they have charged in swap fees, and pay any outstanding debts to the
    // Vault when they are joined or exited. This prevents users from joining a Pool with unpaid debt, as well as
    // exiting a Pool in debt without first paying their share.

    /**
     * @dev Returns the current protocol fee module.
     */
    function getProtocolFeesCollector() external view returns (IProtocolFeesCollector);

    /**
     * @dev Safety mechanism to pause most Vault operations in the event of an emergency - typically detection of an
     * error in some part of the system.
     *
     * The Vault can only be paused during an initial time period, after which pausing is forever disabled.
     *
     * While the contract is paused, the following features are disabled:
     * - depositing and transferring internal balance
     * - transferring external balance (using the Vault's allowance)
     * - swaps
     * - joining Pools
     * - Asset Manager interactions
     *
     * Internal Balance can still be withdrawn, and Pools exited.
     */
    function setPaused(bool paused) external;

    /**
     * @dev Returns the Vault's WETH instance.
     */
    function WETH() external view returns (IWETH);
    // solhint-disable-previous-line func-name-mixedcase
}

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

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

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

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

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

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

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

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

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { CoreAccessControl, CoreAccessControlConfig } from "../core/CoreAccessControl/v1/CoreAccessControl.sol";
import { CoreStopGuardian } from "../core/CoreStopGuardian/v1/CoreStopGuardian.sol";

abstract contract BaseAccessControl is CoreAccessControl, CoreStopGuardian {
    /**
     * @dev
     * Modifiers inherited from CoreAccessControl:
     * onlyDefinitive
     * onlyClients
     * onlyWhitelisted
     * onlyClientAdmin
     * onlyDefinitiveAdmin
     *
     * Modifiers inherited from CoreStopGuardian:
     * stopGuarded
     */

    constructor(CoreAccessControlConfig memory coreAccessControlConfig) CoreAccessControl(coreAccessControlConfig) {}

    /**
     * @dev Inherited from CoreStopGuardian
     */
    function enableStopGuardian() public override onlyAdmins {
        return _enableStopGuardian();
    }

    /**
     * @dev Inherited from CoreStopGuardian
     */
    function disableStopGuardian() public override onlyClientAdmin {
        return _disableStopGuardian();
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { BaseAccessControl } from "./BaseAccessControl.sol";
import { CoreFees, CoreFeesConfig } from "../core/CoreFees/v1/CoreFees.sol";
import { DefinitiveAssets, IERC20 } from "../core/libraries/DefinitiveAssets.sol";
import { DefinitiveConstants } from "../core/libraries/DefinitiveConstants.sol";
import { InvalidFeePercent } from "../core/libraries/DefinitiveErrors.sol";

abstract contract BaseFees is BaseAccessControl, CoreFees {
    using DefinitiveAssets for IERC20;

    constructor(CoreFeesConfig memory coreFeesConfig) CoreFees(coreFeesConfig) {}

    function updateFeeAccount(address payable _feeAccount) public override onlyDefinitiveAdmin {
        _updateFeeAccount(_feeAccount);
    }

    function _handleFeesOnAmount(address token, uint256 amount, uint256 feePct) internal returns (uint256 feeAmount) {
        uint256 mMaxFeePCT = DefinitiveConstants.MAX_FEE_PCT;
        if (feePct > mMaxFeePCT) {
            revert InvalidFeePercent();
        }

        feeAmount = (amount * feePct) / mMaxFeePCT;
        if (feeAmount > 0) {
            if (token == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
                DefinitiveAssets.safeTransferETH(FEE_ACCOUNT, feeAmount);
            } else {
                IERC20(token).safeTransfer(FEE_ACCOUNT, feeAmount);
            }
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { BaseAccessControl } from "../../BaseAccessControl.sol";
import { IBaseNativeWrapperV1 } from "./IBaseNativeWrapperV1.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";

import { DefinitiveAssets, IERC20 } from "../../../core/libraries/DefinitiveAssets.sol";

struct BaseNativeWrapperConfig {
    address payable wrappedNativeAssetAddress;
}

abstract contract BaseNativeWrapper is IBaseNativeWrapperV1, BaseAccessControl, ReentrancyGuard {
    using DefinitiveAssets for IERC20;

    address payable public immutable WRAPPED_NATIVE_ASSET_ADDRESS;

    constructor(BaseNativeWrapperConfig memory baseNativeWrapperConfig) {
        WRAPPED_NATIVE_ASSET_ADDRESS = baseNativeWrapperConfig.wrappedNativeAssetAddress;
    }

    /**
     * @notice Publicly accessible method to wrap native assets
     * @param amount Amount of native assets to wrap
     */
    function wrap(uint256 amount) public onlyWhitelisted nonReentrant {
        _wrap(amount);
        emit NativeAssetWrap(_msgSender(), amount, true /* wrappingToNative */);
    }

    /**
     * @notice Publicly accessible method to unwrap native assets
     * @param amount Amount of tokenized assets to unwrap
     */
    function unwrap(uint256 amount) public onlyWhitelisted nonReentrant {
        _unwrap(amount);
        emit NativeAssetWrap(_msgSender(), amount, false /* wrappingToNative */);
    }

    /**
     * @notice Publicly accessible method to unwrap full balance of native assets
     * @dev Method is not marked as `nonReentrant` since it is a wrapper around `unwrap`
     */
    function unwrapAll() external onlyWhitelisted {
        return unwrap(DefinitiveAssets.getBalance(WRAPPED_NATIVE_ASSET_ADDRESS));
    }

    /**
     * @notice Internal method to wrap native assets
     * @dev Override this method with native asset wrapping implementation
     */
    function _wrap(uint256 amount) internal virtual;

    /**
     * @notice Internal method to unwrap native assets
     * @dev Override this method with native asset unwrapping implementation
     */
    function _unwrap(uint256 amount) internal virtual;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

interface IBaseNativeWrapperV1 {
    event NativeAssetWrap(address actor, uint256 amount, bool indexed wrappingToNative);

    function wrap(uint256 amount) external;

    function unwrap(uint256 amount) external;

    function unwrapAll() external;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { BaseAccessControl } from "../BaseAccessControl.sol";
import { CallUtils } from "../../tools/BubbleReverts/BubbleReverts.sol";
import { IBasePermissionedExecution } from "./IBasePermissionedExecution.sol";

abstract contract BasePermissionedExecution is BaseAccessControl, IBasePermissionedExecution {
    function executeOperation(address target, bytes calldata payload) external payable override onlyClientAdmin {
        (bool _success, bytes memory _returnedData) = payable(target).call{ value: msg.value }(payload);
        if (!_success) {
            CallUtils.revertFromReturnedData(_returnedData);
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreAccessControlV1 } from "../../core/CoreAccessControl/v1/ICoreAccessControlV1.sol";

interface IBasePermissionedExecution is ICoreAccessControlV1 {
    function executeOperation(address target, bytes calldata payload) external payable;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { BaseFees } from "./BaseFees.sol";
import { CoreRewards } from "../core/CoreRewards/v1/CoreRewards.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import { DefinitiveAssets, IERC20 } from "../core/libraries/DefinitiveAssets.sol";

abstract contract BaseRewards is BaseFees, CoreRewards, ReentrancyGuard {
    using DefinitiveAssets for IERC20;

    function claimAllRewards(
        uint256 feePct
    )
        external
        override
        onlyWhitelisted
        nonReentrant
        stopGuarded
        returns (IERC20[] memory rewardTokens, uint256[] memory earnedAmounts)
    {
        (rewardTokens, earnedAmounts) = _claimAllRewards();
        uint256 rewardTokensLength = rewardTokens.length;
        uint256[] memory feeAmounts = new uint256[](rewardTokensLength);
        if (FEE_ACCOUNT != address(0) && feePct > 0) {
            for (uint256 i; i < rewardTokensLength; ) {
                if (earnedAmounts[i] == 0) {
                    unchecked {
                        ++i;
                    }
                    continue;
                }
                feeAmounts[i] = _handleFeesOnAmount(address(rewardTokens[i]), earnedAmounts[i], feePct);
                unchecked {
                    ++i;
                }
            }
        }
        emit RewardsClaimed(rewardTokens, earnedAmounts, feeAmounts);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { BaseAccessControl } from "../../base/BaseAccessControl.sol";
import { IBaseSafeHarborMode } from "./IBaseSafeHarborMode.sol";

abstract contract BaseSafeHarborMode is Context, IBaseSafeHarborMode, BaseAccessControl {
    bool public SAFE_HARBOR_MODE_ENABLED;

    function disableSafeHarborMode() external onlyAdmins {
        _setSafeHarborMode(false);
    }

    function enableSafeHarborMode() external onlyWhitelisted {
        _setSafeHarborMode(true);
    }

    function _setSafeHarborMode(bool _enabled) internal {
        SAFE_HARBOR_MODE_ENABLED = _enabled;
        emit SafeHarborModeUpdate(_msgSender(), _enabled);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

// solhint-disable-next-line contract-name-camelcase
interface IBaseSafeHarborMode {
    event SafeHarborModeUpdate(address indexed actor, bool indexed isEnabled);

    function SAFE_HARBOR_MODE_ENABLED() external view returns (bool);

    function enableSafeHarborMode() external;

    function disableSafeHarborMode() external;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { BaseFees } from "./BaseFees.sol";
import { CoreSwap, CoreSwapConfig, SwapPayload } from "../core/CoreSwap/v1/CoreSwap.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import { DefinitiveConstants } from "../core/libraries/DefinitiveConstants.sol";
import { InvalidFeePercent, InvalidSwapPayload, SlippageExceeded } from "../core/libraries/DefinitiveErrors.sol";
import { ICoreSwapHandlerV1 } from "../core/CoreSwapHandler/ICoreSwapHandlerV1.sol";

abstract contract BaseSwap is BaseFees, CoreSwap, ReentrancyGuard {
    constructor(CoreSwapConfig memory coreSwapConfig) CoreSwap(coreSwapConfig) {}

    function enableSwapTokens(address[] memory swapTokens) public override onlyClientAdmin stopGuarded {
        return _updateSwapTokens(swapTokens, true);
    }

    function disableSwapTokens(address[] memory swapTokens) public override onlyAdmins {
        return _updateSwapTokens(swapTokens, false);
    }

    function enableSwapOutputTokens(address[] memory swapOutputTokens) public override onlyClientAdmin stopGuarded {
        return _updateSwapOutputTokens(swapOutputTokens, true);
    }

    function disableSwapOutputTokens(address[] memory swapOutputTokens) public override onlyAdmins {
        return _updateSwapOutputTokens(swapOutputTokens, false);
    }

    function enableSwapHandlers(address[] memory swapHandlers) public override onlyClientAdmin stopGuarded {
        _updateSwapHandlers(swapHandlers, true);
    }

    function disableSwapHandlers(address[] memory swapHandlers) public override onlyAdmins {
        _updateSwapHandlers(swapHandlers, false);
    }

    function swap(
        SwapPayload[] memory payloads,
        address outputToken,
        uint256 amountOutMin,
        uint256 feePct
    ) external override onlyWhitelisted nonReentrant stopGuarded returns (uint256) {
        if (feePct > DefinitiveConstants.MAX_FEE_PCT) {
            revert InvalidFeePercent();
        }

        (uint256[] memory inputAmounts, uint256 outputAmount) = _swap(payloads, outputToken);
        if (outputAmount < amountOutMin) {
            revert SlippageExceeded(outputAmount, amountOutMin);
        }

        address[] memory swapTokens = new address[](payloads.length);
        uint256 swapTokensLength = swapTokens.length;
        for (uint256 i; i < swapTokensLength; ) {
            swapTokens[i] = payloads[i].swapToken;
            unchecked {
                ++i;
            }
        }

        uint256 feeAmount;
        if (FEE_ACCOUNT != address(0) && outputAmount > 0 && feePct > 0) {
            feeAmount = _handleFeesOnAmount(outputToken, outputAmount, feePct);
        }
        emit SwapHandled(swapTokens, inputAmounts, outputToken, outputAmount, feeAmount);

        return outputAmount;
    }

    function _getEncodedSwapHandlerCalldata(
        SwapPayload memory payload,
        address expectedOutputToken,
        bool isPrincipalAssetSwap,
        bool isDelegateCall
    ) internal pure override returns (bytes memory) {
        // Principal Swaps
        if (isPrincipalAssetSwap && isDelegateCall) {
            revert InvalidSwapPayload();
        }

        bytes4 selector;
        if (isPrincipalAssetSwap) {
            selector = ICoreSwapHandlerV1.swapUsingValidatedPathCall.selector;
        } else {
            selector = isDelegateCall ? ICoreSwapHandlerV1.swapDelegate.selector : ICoreSwapHandlerV1.swapCall.selector;
        }

        ICoreSwapHandlerV1.SwapParams memory _params = ICoreSwapHandlerV1.SwapParams({
            inputAssetAddress: payload.swapToken,
            inputAmount: payload.amount,
            outputAssetAddress: expectedOutputToken,
            minOutputAmount: payload.amountOutMin,
            data: payload.handlerCalldata,
            signature: payload.signature
        });

        return abi.encodeWithSelector(selector, _params);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { CoreDeposit } from "../../../core/CoreDeposit/v1/CoreDeposit.sol";
import { CoreWithdraw } from "../../../core/CoreWithdraw/v1/CoreWithdraw.sol";
import { BaseAccessControl } from "../../BaseAccessControl.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";

abstract contract BaseTransfers is CoreDeposit, CoreWithdraw, BaseAccessControl, ReentrancyGuard {
    function deposit(
        uint256[] calldata amounts,
        address[] calldata erc20Tokens
    ) external payable virtual override onlyClients nonReentrant stopGuarded {
        return _deposit(amounts, erc20Tokens);
    }

    function withdraw(
        uint256 amount,
        address erc20Token
    ) public virtual override onlyClients nonReentrant stopGuarded returns (bool) {
        return _withdraw(amount, erc20Token);
    }

    function withdrawTo(
        uint256 amount,
        address erc20Token,
        address to
    ) public virtual override onlyWhitelisted nonReentrant stopGuarded returns (bool) {
        // `to` account must be a client
        _checkRole(ROLE_CLIENT, to);

        return _withdrawTo(amount, erc20Token, to);
    }

    function withdrawAll(
        address[] calldata tokens
    ) public virtual override onlyClients nonReentrant stopGuarded returns (bool) {
        return _withdrawAll(tokens);
    }

    function withdrawAllTo(
        address[] calldata tokens,
        address to
    ) public virtual override onlyWhitelisted stopGuarded returns (bool) {
        _checkRole(ROLE_CLIENT, to);
        return _withdrawAllTo(tokens, to);
    }

    function supportsNativeAssets() public pure virtual override returns (bool) {
        return false;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { IBaseNativeWrapperV1 } from "../../BaseNativeWrapper/v1/IBaseNativeWrapperV1.sol";
import { BaseTransfers } from "../../BaseTransfers/v1/BaseTransfers.sol";
import { CoreTransfersNative } from "../../../core/CoreTransfersNative/v1/CoreTransfersNative.sol";

abstract contract BaseTransfersNative is IBaseNativeWrapperV1, CoreTransfersNative, BaseTransfers {
    function deposit(
        uint256[] calldata amounts,
        address[] calldata assetAddresses
    ) external payable override onlyClients nonReentrant stopGuarded {
        _depositNativeAndERC20(amounts, assetAddresses);
        emit Deposit(_msgSender(), assetAddresses, amounts);
    }

    function supportsNativeAssets() public pure override returns (bool) {
        return true;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { AccessControl as OZAccessControl } from "@openzeppelin/contracts/access/AccessControl.sol";
import { ICoreAccessControlV1 } from "./ICoreAccessControlV1.sol";
import { AccountNotAdmin, AccountNotWhitelisted, AccountMissingRole } from "../../libraries/DefinitiveErrors.sol";

struct CoreAccessControlConfig {
    address admin;
    address definitiveAdmin;
    address[] definitive;
    address[] client;
}

abstract contract CoreAccessControl is ICoreAccessControlV1, OZAccessControl {
    // roles
    bytes32 public constant ROLE_DEFINITIVE = keccak256("DEFINITIVE");
    bytes32 public constant ROLE_DEFINITIVE_ADMIN = keccak256("DEFINITIVE_ADMIN");
    bytes32 public constant ROLE_CLIENT = keccak256("CLIENT");

    modifier onlyDefinitive() {
        _checkRole(ROLE_DEFINITIVE);
        _;
    }
    modifier onlyDefinitiveAdmin() {
        _checkRole(ROLE_DEFINITIVE_ADMIN);
        _;
    }
    modifier onlyClients() {
        _checkRole(ROLE_CLIENT);
        _;
    }
    modifier onlyClientAdmin() {
        _checkRole(DEFAULT_ADMIN_ROLE);
        _;
    }
    // default admin + definitive admin
    modifier onlyAdmins() {
        bool isAdmins = (hasRole(DEFAULT_ADMIN_ROLE, _msgSender()) || hasRole(ROLE_DEFINITIVE_ADMIN, _msgSender()));

        if (!isAdmins) {
            revert AccountNotAdmin(_msgSender());
        }
        _;
    }
    // client + definitive
    modifier onlyWhitelisted() {
        bool isWhitelisted = (hasRole(ROLE_CLIENT, _msgSender()) || hasRole(ROLE_DEFINITIVE, _msgSender()));

        if (!isWhitelisted) {
            revert AccountNotWhitelisted(_msgSender());
        }
        _;
    }

    constructor(CoreAccessControlConfig memory cfg) {
        // admin
        _setupRole(DEFAULT_ADMIN_ROLE, cfg.admin);

        // definitive admin
        _setupRole(ROLE_DEFINITIVE_ADMIN, cfg.definitiveAdmin);
        _setRoleAdmin(ROLE_DEFINITIVE_ADMIN, ROLE_DEFINITIVE_ADMIN);

        // definitive
        uint256 cfgDefinitiveLength = cfg.definitive.length;
        for (uint256 i; i < cfgDefinitiveLength; ) {
            _setupRole(ROLE_DEFINITIVE, cfg.definitive[i]);
            unchecked {
                ++i;
            }
        }
        _setRoleAdmin(ROLE_DEFINITIVE, ROLE_DEFINITIVE_ADMIN);

        // clients - implicit role admin is DEFAULT_ADMIN_ROLE
        uint256 cfgClientLength = cfg.client.length;
        for (uint256 i; i < cfgClientLength; ) {
            _setupRole(ROLE_CLIENT, cfg.client[i]);
            unchecked {
                ++i;
            }
        }
    }

    function _checkRole(bytes32 role, address account) internal view virtual override {
        if (!hasRole(role, account)) {
            revert AccountMissingRole(account, role);
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { IAccessControl } from "@openzeppelin/contracts/access/IAccessControl.sol";

interface ICoreAccessControlV1 is IAccessControl {
    function ROLE_CLIENT() external returns (bytes32);

    function ROLE_DEFINITIVE() external returns (bytes32);

    function ROLE_DEFINITIVE_ADMIN() external returns (bytes32);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreDepositV1 } from "./ICoreDepositV1.sol";
import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { DefinitiveAssets, IERC20 } from "../../libraries/DefinitiveAssets.sol";

import { InvalidInputs } from "../../libraries/DefinitiveErrors.sol";

abstract contract CoreDeposit is ICoreDepositV1, Context {
    using DefinitiveAssets for IERC20;

    function deposit(uint256[] calldata amounts, address[] calldata assetAddresses) external payable virtual;

    function _deposit(uint256[] calldata amounts, address[] calldata erc20Tokens) internal virtual {
        _depositERC20(amounts, erc20Tokens);

        emit Deposit(_msgSender(), erc20Tokens, amounts);
    }

    function _depositERC20(uint256[] calldata amounts, address[] calldata erc20Tokens) internal {
        uint256 amountsLength = amounts.length;
        if (amountsLength != erc20Tokens.length) {
            revert InvalidInputs();
        }

        for (uint256 i; i < amountsLength; ) {
            IERC20(erc20Tokens[i]).safeTransferFrom(_msgSender(), address(this), amounts[i]);
            unchecked {
                ++i;
            }
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

interface ICoreDepositV1 {
    event Deposit(address indexed actor, address[] assetAddresses, uint256[] amounts);

    function deposit(uint256[] calldata amounts, address[] calldata assetAddresses) external payable;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreFeesV1 } from "./ICoreFeesV1.sol";
import { Context } from "@openzeppelin/contracts/utils/Context.sol";

struct CoreFeesConfig {
    address payable feeAccount;
}

abstract contract CoreFees is ICoreFeesV1, Context {
    address payable public FEE_ACCOUNT;

    constructor(CoreFeesConfig memory coreFeesConfig) {
        FEE_ACCOUNT = coreFeesConfig.feeAccount;
    }

    function _updateFeeAccount(address payable feeAccount) internal {
        FEE_ACCOUNT = feeAccount;
        emit FeeAccountUpdated(_msgSender(), feeAccount);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

interface ICoreFeesV1 {
    event FeeAccountUpdated(address actor, address feeAccount);

    function FEE_ACCOUNT() external returns (address payable);

    function updateFeeAccount(address payable feeAccount) external;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreMulticallV1 } from "./ICoreMulticallV1.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { DefinitiveAssets } from "../../libraries/DefinitiveAssets.sol";

/* solhint-disable max-line-length */
/**
 * @notice Implements openzeppelin/contracts/utils/Multicall.sol
 * Source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/5b027e517e6aee69f4b4b2f5e78274ac8ee53513/contracts/utils/Multicall.sol solhint-disable max-line-length
 */
/* solhint-enable max-line-length */
abstract contract CoreMulticall is ICoreMulticallV1 {
    /**
     * @dev Receives and executes a batch of function calls on this contract.
     */
    function multicall(bytes[] calldata data) external returns (bytes[] memory results) {
        uint256 dataLength = data.length;
        results = new bytes[](dataLength);
        for (uint256 i; i < dataLength; ) {
            results[i] = Address.functionDelegateCall(address(this), data[i]);
            unchecked {
                ++i;
            }
        }
    }

    function getBalance(address assetAddress) public view returns (uint256) {
        return DefinitiveAssets.getBalance(assetAddress);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

interface ICoreMulticallV1 {
    function multicall(bytes[] calldata data) external returns (bytes[] memory results);

    function getBalance(address assetAddress) external view returns (uint256);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreRewardsV1 } from "./ICoreRewardsV1.sol";
import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { IERC20 } from "../../libraries/DefinitiveAssets.sol";

abstract contract CoreRewards is ICoreRewardsV1, Context {
    /**
     * @dev Override this method for the implementation of returning tokens and their respective claim amounts
     *
     * @notice returns the reward token and amount of unclaimed tokens
     * @return (IERC20[], uint256[])    tokens and rewards
     */
    function unclaimedRewards() public view virtual returns (IERC20[] memory, uint256[] memory);

    function claimAllRewards(uint256 feePct) external virtual returns (IERC20[] memory, uint256[] memory);

    /**
     * @dev Override this method for the implementation of claiming rewards
     */
    function _claimAllRewards() internal virtual returns (IERC20[] memory, uint256[] memory);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { IERC20 } from "../../../core/libraries/DefinitiveAssets.sol";

interface ICoreRewardsV1 {
    event RewardsClaimed(IERC20[] rewardTokens, uint256[] rewardAmounts, uint256[] feeAmounts);

    function unclaimedRewards() external view returns (IERC20[] memory, uint256[] memory);

    function claimAllRewards(uint256 feePct) external returns (IERC20[] memory, uint256[] memory);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreStopGuardianV1 } from "./ICoreStopGuardianV1.sol";

import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { StopGuardianEnabled } from "../../libraries/DefinitiveErrors.sol";

abstract contract CoreStopGuardian is ICoreStopGuardianV1, Context {
    bool public STOP_GUARDIAN_ENABLED;

    // recommended for every public/external function
    modifier stopGuarded() {
        if (STOP_GUARDIAN_ENABLED) {
            revert StopGuardianEnabled();
        }

        _;
    }

    function enableStopGuardian() public virtual;

    function disableStopGuardian() public virtual;

    function _enableStopGuardian() internal {
        STOP_GUARDIAN_ENABLED = true;
        emit StopGuardianUpdate(_msgSender(), true);
    }

    function _disableStopGuardian() internal {
        STOP_GUARDIAN_ENABLED = false;
        emit StopGuardianUpdate(_msgSender(), false);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

interface ICoreStopGuardianV1 {
    event StopGuardianUpdate(address indexed actor, bool indexed isEnabled);

    function STOP_GUARDIAN_ENABLED() external view returns (bool);

    function enableStopGuardian() external;

    function disableStopGuardian() external;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreSwapV1 } from "./ICoreSwapV1.sol";
import { DefinitiveAssets, IERC20 } from "../../libraries/DefinitiveAssets.sol";
import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { CallUtils } from "../../../tools/BubbleReverts/BubbleReverts.sol";
import { DefinitiveConstants } from "../../libraries/DefinitiveConstants.sol";
import {
    InvalidSwapOutputToken,
    InvalidSwapHandler,
    InsufficientSwapTokenBalance,
    SwapTokenIsOutputToken,
    InvalidOutputToken,
    InvalidReportedOutputAmount,
    InvalidExecutedOutputAmount,
    SwapLimitExceeded
} from "../../libraries/DefinitiveErrors.sol";

struct CoreSwapConfig {
    address[] swapTokens;
    address[] swapOutputTokens;
    address[] swapHandlers;
}

struct SwapPayload {
    address handler;
    uint256 amount; // set 0 for maximum available balance
    address swapToken;
    uint256 amountOutMin;
    bool isDelegate;
    bytes handlerCalldata;
    bytes signature;
}

abstract contract CoreSwap is ICoreSwapV1, Context {
    using DefinitiveAssets for IERC20;

    uint256 internal swapsThisBlock;
    uint256 internal latestBlockNumber;
    uint256 public immutable MAX_SWAPS_PER_BLOCK;

    /**
     * @notice Maintains mapping for reward tokens
     * @notice Tokens _not_ in this list will be treated as principal assets
     * @dev erc20 token => valid
     */
    mapping(address => bool) public _swapTokens;

    /// @dev erc20 token => valid
    mapping(address => bool) public _swapOutputTokens;

    /// @dev handler contract => enabled
    mapping(address => bool) public _swapHandlers;

    modifier enforceSwapLimit(SwapPayload[] memory payloads) {
        if (block.number != latestBlockNumber) {
            latestBlockNumber = block.number;
            delete swapsThisBlock;
        }
        swapsThisBlock += payloads.length;
        if (swapsThisBlock > MAX_SWAPS_PER_BLOCK) {
            revert SwapLimitExceeded();
        }
        _;
    }

    constructor(CoreSwapConfig memory coreSwapConfig) {
        uint256 coreswapConfigSwapTokensLength = coreSwapConfig.swapTokens.length;
        MAX_SWAPS_PER_BLOCK = DefinitiveConstants.MAX_SWAPS_PER_BLOCK;
        for (uint256 i; i < coreswapConfigSwapTokensLength; ) {
            _swapTokens[coreSwapConfig.swapTokens[i]] = true;
            unchecked {
                ++i;
            }
        }
        uint256 coreSwapConfigSwapOutputTokensLength = coreSwapConfig.swapOutputTokens.length;
        for (uint256 i; i < coreSwapConfigSwapOutputTokensLength; ) {
            _swapOutputTokens[coreSwapConfig.swapOutputTokens[i]] = true;
            unchecked {
                ++i;
            }
        }
        uint256 coreSwapConfigSwapHandlersLength = coreSwapConfig.swapHandlers.length;
        for (uint256 i; i < coreSwapConfigSwapHandlersLength; ) {
            _swapHandlers[coreSwapConfig.swapHandlers[i]] = true;
            unchecked {
                ++i;
            }
        }
    }

    function enableSwapTokens(address[] memory swapTokens) public virtual;

    function disableSwapTokens(address[] memory swapTokens) public virtual;

    function _updateSwapTokens(address[] memory swapTokens, bool enabled) internal {
        uint256 swapTokensLength = swapTokens.length;
        for (uint256 i; i < swapTokensLength; ) {
            _swapTokens[swapTokens[i]] = enabled;
            emit SwapTokenUpdate(_msgSender(), swapTokens[i], enabled);
            unchecked {
                ++i;
            }
        }
    }

    function enableSwapOutputTokens(address[] memory swapOutputTokens) public virtual;

    function disableSwapOutputTokens(address[] memory swapOutputTokens) public virtual;

    function _updateSwapOutputTokens(address[] memory swapOutputTokens, bool enabled) internal {
        uint256 swapOutputTokensLength = swapOutputTokens.length;
        for (uint256 i; i < swapOutputTokensLength; ) {
            _swapOutputTokens[swapOutputTokens[i]] = enabled;
            emit SwapOutputTokenUpdate(_msgSender(), swapOutputTokens[i], enabled);
            unchecked {
                ++i;
            }
        }
    }

    function enableSwapHandlers(address[] memory swapHandlers) public virtual;

    function disableSwapHandlers(address[] memory swapHandlers) public virtual;

    function _updateSwapHandlers(address[] memory swapHandlers, bool enabled) internal {
        uint256 swapHandlersLength = swapHandlers.length;
        for (uint256 i; i < swapHandlersLength; ) {
            _swapHandlers[swapHandlers[i]] = enabled;
            emit SwapHandlerUpdate(_msgSender(), swapHandlers[i], enabled);
            unchecked {
                ++i;
            }
        }
    }

    function swap(
        SwapPayload[] memory payloads,
        address outputToken,
        uint256 amountOutMin,
        uint256 feePct
    ) external virtual returns (uint256 outputAmount);

    function _swap(
        SwapPayload[] memory payloads,
        address expectedOutputToken
    ) internal enforceSwapLimit(payloads) returns (uint256[] memory inputTokenAmounts, uint256 outputTokenAmount) {
        if (!_swapOutputTokens[expectedOutputToken]) {
            revert InvalidSwapOutputToken();
        }
        uint256 payloadsLength = payloads.length;
        inputTokenAmounts = new uint256[](payloadsLength);
        uint256 outputTokenBalanceStart = DefinitiveAssets.getBalance(expectedOutputToken);

        for (uint256 i; i < payloadsLength; ) {
            SwapPayload memory payload = payloads[i];

            if (!_swapHandlers[payload.handler]) {
                revert InvalidSwapHandler();
            }

            if (expectedOutputToken == payload.swapToken) {
                revert SwapTokenIsOutputToken();
            }

            uint256 outputTokenBalanceBefore = DefinitiveAssets.getBalance(expectedOutputToken);
            inputTokenAmounts[i] = DefinitiveAssets.getBalance(payload.swapToken);

            (uint256 _outputAmount, address _outputToken) = _processSwap(payload, expectedOutputToken);

            if (_outputToken != expectedOutputToken) {
                revert InvalidOutputToken();
            }
            if (_outputAmount < payload.amountOutMin) {
                revert InvalidReportedOutputAmount();
            }
            uint256 outputTokenBalanceAfter = DefinitiveAssets.getBalance(expectedOutputToken);

            if ((outputTokenBalanceAfter - outputTokenBalanceBefore) < payload.amountOutMin) {
                revert InvalidExecutedOutputAmount();
            }

            // Update `inputTokenAmounts` to reflect the amount of tokens actually swapped
            inputTokenAmounts[i] -= DefinitiveAssets.getBalance(payload.swapToken);
            unchecked {
                ++i;
            }
        }

        outputTokenAmount = DefinitiveAssets.getBalance(expectedOutputToken) - outputTokenBalanceStart;
    }

    function _processSwap(SwapPayload memory payload, address expectedOutputToken) private returns (uint256, address) {
        // Override payload.amount with validated amount
        payload.amount = _getValidatedPayloadAmount(payload);

        /// @dev if asset is in _swapTokens, then it is a reward token
        bool isPrincipalAssetSwap = !_swapTokens[payload.swapToken];

        bytes memory _calldata = _getEncodedSwapHandlerCalldata(
            payload,
            expectedOutputToken,
            isPrincipalAssetSwap,
            payload.isDelegate
        );

        bool _success;
        bytes memory _returnBytes;
        if (payload.isDelegate) {
            // slither-disable-next-line controlled-delegatecall
            (_success, _returnBytes) = payload.handler.delegatecall(_calldata);
        } else {
            _prepareAssetsForNonDelegateHandlerCall(payload, payload.amount);
            (_success, _returnBytes) = payload.handler.call(_calldata);
        }

        if (!_success) {
            CallUtils.revertFromReturnedData(_returnBytes);
        }

        return abi.decode(_returnBytes, (uint256, address));
    }

    function _getEncodedSwapHandlerCalldata(
        SwapPayload memory payload,
        address expectedOutputToken,
        bool isPrincipalAssetSwap,
        bool isDelegateCall
    ) internal pure virtual returns (bytes memory);

    function _getValidatedPayloadAmount(SwapPayload memory payload) private view returns (uint256 amount) {
        uint256 balance = DefinitiveAssets.getBalance(payload.swapToken);

        // Ensure balance > 0
        DefinitiveAssets.validateAmount(balance);

        amount = payload.amount;

        if (amount != 0 && balance < amount) {
            revert InsufficientSwapTokenBalance();
        }

        // maximum available balance if amount == 0
        if (amount == 0) {
            return balance;
        }
    }

    function _prepareAssetsForNonDelegateHandlerCall(SwapPayload memory payload, uint256 amount) private {
        if (payload.swapToken == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            // Send ETH to handler
            DefinitiveAssets.safeTransferETH(payable(payload.handler), amount);
        } else {
            IERC20(payload.swapToken).resetAndSafeIncreaseAllowance(address(this), payload.handler, amount);
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { SwapPayload } from "./CoreSwap.sol";

interface ICoreSwapV1 {
    event SwapHandlerUpdate(address actor, address swapHandler, bool isEnabled);
    event SwapTokenUpdate(address actor, address swapToken, bool isEnabled);
    event SwapOutputTokenUpdate(address actor, address swapOutputToken, bool isEnabled);
    event SwapHandled(
        address[] swapTokens,
        uint256[] swapAmounts,
        address outputToken,
        uint256 outputAmount,
        uint256 feeAmount
    );

    function enableSwapTokens(address[] memory swapTokens) external;

    function disableSwapTokens(address[] memory swapTokens) external;

    function enableSwapOutputTokens(address[] memory swapOutputTokens) external;

    function disableSwapOutputTokens(address[] memory swapOutputTokens) external;

    function enableSwapHandlers(address[] memory swapHandlers) external;

    function disableSwapHandlers(address[] memory swapHandlers) external;

    function swap(
        SwapPayload[] memory payloads,
        address outputToken,
        uint256 amountOutMin,
        uint256 feePct
    ) external returns (uint256 outputAmount);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

interface ICoreSwapHandlerV1 {
    event Swap(
        address indexed actor,
        address indexed inputToken,
        uint256 inputAmount,
        address indexed outputToken,
        uint256 outputAmount
    );

    struct SwapParams {
        address inputAssetAddress;
        uint256 inputAmount;
        address outputAssetAddress;
        uint256 minOutputAmount;
        bytes data;
        bytes signature;
    }

    function swapCall(SwapParams calldata params) external payable returns (uint256 amountOut, address outputAsset);

    function swapDelegate(SwapParams calldata params) external payable returns (uint256 amountOut, address outputAsset);

    function swapUsingValidatedPathCall(
        SwapParams calldata params
    ) external payable returns (uint256 amountOut, address outputAsset);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { ICoreTransfersNativeV1 } from "./ICoreTransfersNativeV1.sol";

import { DefinitiveAssets, IERC20 } from "../../libraries/DefinitiveAssets.sol";
import { DefinitiveConstants } from "../../libraries/DefinitiveConstants.sol";
import { InvalidInputs, InvalidMsgValue } from "../../libraries/DefinitiveErrors.sol";

abstract contract CoreTransfersNative is ICoreTransfersNativeV1, Context {
    using DefinitiveAssets for IERC20;

    /**
     * @notice Allows contract to receive native assets
     */
    receive() external payable virtual {}

    /**
     * @notice This function is executed if none of the other functions
     * match the call data.  `bytes calldata` will contain the full data sent
     * to the contract (equal to msg.data) and can return data in output.
     * The returned data will not be ABI-encoded, and will be returned without
     * modifications (not even padding).
     * https://docs.soliditylang.org/en/v0.8.17/contracts.html#fallback-function
     */
    fallback(bytes calldata) external payable virtual returns (bytes memory) {}

    function _depositNativeAndERC20(uint256[] calldata amounts, address[] calldata assetAddresses) internal virtual {
        uint256 assetAddressesLength = assetAddresses.length;
        if (amounts.length != assetAddressesLength) {
            revert InvalidInputs();
        }

        bool hasNativeAsset;
        uint256 nativeAssetIndex;

        for (uint256 i; i < assetAddressesLength; ) {
            if (assetAddresses[i] == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
                nativeAssetIndex = i;
                hasNativeAsset = true;
                unchecked {
                    ++i;
                }
                continue;
            }
            // ERC20 tokens
            IERC20(assetAddresses[i]).safeTransferFrom(_msgSender(), address(this), amounts[i]);
            unchecked {
                ++i;
            }
        }
        // Revert if NATIVE_ASSET_ADDRESS is not in assetAddresses and msg.value is not zero
        if (!hasNativeAsset && msg.value != 0) {
            revert InvalidMsgValue();
        }

        // Revert if depositing native asset and amount != msg.value
        if (hasNativeAsset && msg.value != amounts[nativeAssetIndex]) {
            revert InvalidMsgValue();
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

interface ICoreTransfersNativeV1 {
    receive() external payable;

    fallback(bytes calldata) external payable returns (bytes memory);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreWithdrawV1 } from "./ICoreWithdrawV1.sol";
import { DefinitiveAssets, IERC20 } from "../../libraries/DefinitiveAssets.sol";
import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { DefinitiveConstants } from "../../libraries/DefinitiveConstants.sol";

abstract contract CoreWithdraw is ICoreWithdrawV1, Context {
    using DefinitiveAssets for IERC20;

    function supportsNativeAssets() public pure virtual returns (bool);

    function withdraw(uint256 amount, address erc20Token) public virtual returns (bool);

    function withdrawTo(uint256 amount, address erc20Token, address to) public virtual returns (bool);

    function _withdraw(uint256 amount, address erc20Token) internal returns (bool) {
        return _withdrawTo(amount, erc20Token, _msgSender());
    }

    function _withdrawTo(uint256 amount, address erc20Token, address to) internal returns (bool success) {
        if (erc20Token == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            DefinitiveAssets.safeTransferETH(payable(to), amount);
        } else {
            IERC20(erc20Token).safeTransfer(to, amount);
        }

        emit Withdrawal(erc20Token, amount, to);

        success = true;
    }

    function withdrawAll(address[] calldata tokens) public virtual returns (bool);

    function withdrawAllTo(address[] calldata tokens, address to) public virtual returns (bool);

    function _withdrawAll(address[] calldata tokens) internal returns (bool) {
        return _withdrawAllTo(tokens, _msgSender());
    }

    function _withdrawAllTo(address[] calldata tokens, address to) internal returns (bool success) {
        uint256 tokenLength = tokens.length;
        for (uint256 i; i < tokenLength; ) {
            uint256 tokenBalance = DefinitiveAssets.getBalance(tokens[i]);
            if (tokenBalance > 0) {
                _withdrawTo(tokenBalance, tokens[i], to);
            }
            unchecked {
                ++i;
            }
        }
        return true;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

interface ICoreWithdrawV1 {
    event Withdrawal(address indexed erc20Token, uint256 amount, address indexed recipient);

    function withdrawAll(address[] calldata tokens) external returns (bool);

    function withdrawAllTo(address[] calldata tokens, address to) external returns (bool);

    function supportsNativeAssets() external pure returns (bool);

    function withdraw(uint256 amount, address erc20Token) external returns (bool);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { SafeTransferLib } from "solmate/src/utils/SafeTransferLib.sol";
import { DefinitiveConstants } from "./DefinitiveConstants.sol";

import { InsufficientBalance, InvalidAmount, InvalidAmounts, InvalidERC20Address } from "./DefinitiveErrors.sol";

/**
 * @notice Contains methods used throughout the Definitive contracts
 * @dev This file should only be used as an internal library.
 */
library DefinitiveAssets {
    /**
     * @dev Checks if an address is a valid ERC20 token
     */
    modifier onlyValidERC20(address erc20Token) {
        if (address(erc20Token) == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            revert InvalidERC20Address();
        }
        _;
    }

    //////////////////////////////////////////////////
    //////////////////////////////////////////////////
    // ↓ ERC20 and Native Asset Methods ↓
    //////////////////////////////////////////////////

    /**
     * @dev Gets the balance of an ERC20 token or native asset
     */
    function getBalance(address assetAddress) internal view returns (uint256) {
        if (assetAddress == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            return address(this).balance;
        } else {
            return IERC20(assetAddress).balanceOf(address(this));
        }
    }

    /**
     * @dev internal function to validate balance is higher than a given amount for ERC20 and native assets
     */
    function validateBalance(address token, uint256 amount) internal view {
        if (token == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            validateNativeBalance(amount);
        } else {
            validateERC20Balance(token, amount);
        }
    }

    //////////////////////////////////////////////////
    //////////////////////////////////////////////////
    // ↓ Native Asset Methods ↓
    //////////////////////////////////////////////////

    /**
     * @dev validates amount and balance, then uses SafeTransferLib to transfer native asset
     */
    function safeTransferETH(address recipient, uint256 amount) internal {
        if (amount > 0) {
            SafeTransferLib.safeTransferETH(payable(recipient), amount);
        }
    }

    //////////////////////////////////////////////////
    //////////////////////////////////////////////////
    // ↓ ERC20 Methods ↓
    //////////////////////////////////////////////////

    /**
     * @dev Resets and increases the allowance of a spender for an ERC20 token
     */
    function resetAndSafeIncreaseAllowance(
        IERC20 token,
        address owner,
        address spender,
        uint256 amount
    ) internal onlyValidERC20(address(token)) {
        if (token.allowance(owner, spender) > 0) {
            SafeERC20.safeApprove(token, spender, 0);
        }

        return SafeERC20.safeIncreaseAllowance(token, spender, amount);
    }

    function safeTransfer(IERC20 token, address to, uint256 amount) internal onlyValidERC20(address(token)) {
        if (amount > 0) {
            SafeERC20.safeTransfer(token, to, amount);
        }
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal onlyValidERC20(address(token)) {
        if (amount > 0) {
            //slither-disable-next-line arbitrary-send-erc20
            SafeERC20.safeTransferFrom(token, from, to, amount);
        }
    }

    //////////////////////////////////////////////////
    //////////////////////////////////////////////////
    // ↓ Asset Amount Helper Methods ↓
    //////////////////////////////////////////////////

    /**
     * @dev internal function to validate that amounts contains a value greater than zero
     */
    function validateAmounts(uint256[] calldata amounts) internal pure {
        bool hasValidAmounts;
        uint256 amountsLength = amounts.length;
        for (uint256 i; i < amountsLength; ) {
            if (amounts[i] > 0) {
                hasValidAmounts = true;
                break;
            }
            unchecked {
                ++i;
            }
        }

        if (!hasValidAmounts) {
            revert InvalidAmounts();
        }
    }

    /**
     * @dev internal function to validate if native asset balance is higher than the amount requested
     */
    function validateNativeBalance(uint256 amount) internal view {
        if (getBalance(DefinitiveConstants.NATIVE_ASSET_ADDRESS) < amount) {
            revert InsufficientBalance();
        }
    }

    /**
     * @dev internal function to validate balance is higher than the amount requested for a token
     */
    function validateERC20Balance(address token, uint256 amount) internal view onlyValidERC20(token) {
        if (getBalance(token) < amount) {
            revert InsufficientBalance();
        }
    }

    function validateAmount(uint256 _amount) internal pure {
        if (_amount == 0) {
            revert InvalidAmount();
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

/**
 * @notice Contains constants used throughout the Definitive contracts
 * @dev This file should only be used as an internal library.
 */
library DefinitiveConstants {
    /**
     * @notice Maximum fee percentage
     */
    uint256 internal constant MAX_FEE_PCT = 10000;

    /**
     * @notice Address to signify native assets
     */
    address internal constant NATIVE_ASSET_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /**
     * @notice Maximum number of swaps allowed per block
     */
    uint8 internal constant MAX_SWAPS_PER_BLOCK = 25;

    struct Assets {
        uint256[] amounts;
        address[] addresses;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

/**
 * @notice Contains all errors used throughout the Definitive contracts
 * @dev This file should only be used as an internal library.
 * @dev When adding a new error, add alphabetically
 */

error AccountMissingRole(address _account, bytes32 _role);
error AccountNotAdmin(address);
error AccountNotWhitelisted(address);
error AddLiquidityFailed();
error DeadlineExceeded();
error BorrowFailed(uint256 errorCode);
error DecollateralizeFailed(uint256 errorCode);
error DepositMoreThanMax();
error EnterAllFailed();
error EnforcedSafeLTV(uint256 invalidLTV);
error ExceededMaxDelta();
error ExceededMaxLTV();
error ExceededShareToAssetRatioDeltaThreshold();
error ExitAllFailed();
error ExitOneCoinFailed();
error InitializeMarketsFailed();
error InputGreaterThanStaked();
error InsufficientBalance();
error InsufficientSwapTokenBalance();
error InvalidAmount();
error InvalidAmounts();
error InvalidCalldata();
error InvalidDestinationSwapper();
error InvalidERC20Address();
error InvalidExecutedOutputAmount();
error InvalidFeePercent();
error InvalidHandler();
error InvalidInputs();
error InvalidMsgValue();
error InvalidSingleHopSwap();
error InvalidMultiHopSwap();
error InvalidOutputToken();
error InvalidRedemptionRecipient(); // Used in cross-chain redeptions
error InvalidReportedOutputAmount();
error InvalidRewardsClaim();
error InvalidSignature();
error InvalidSignatureLength();
error InvalidSwapHandler();
error InvalidSwapInputAmount();
error InvalidSwapOutputToken();
error InvalidSwapPath();
error InvalidSwapPayload();
error InvalidSwapToken();
error MintMoreThanMax();
error NativeAssetWrapFailed(bool wrappingToNative);
error NoSignatureVerificationSignerSet();
error RedeemMoreThanMax();
error RemoveLiquidityFailed();
error RepayDebtFailed();
error SafeHarborModeEnabled();
error SafeHarborRedemptionDisabled();
error SlippageExceeded(uint256 _outputAmount, uint256 _outputAmountMin);
error StakeFailed();
error SupplyFailed();
error StopGuardianEnabled();
error SwapDeadlineExceeded();
error SwapLimitExceeded();
error SwapTokenIsOutputToken();
error TransfersLimitExceeded();
error UnstakeFailed();
error UnauthenticatedFlashloan();
error UntrustedFlashLoanSender(address);
error WithdrawMoreThanMax();
error ZeroShares();

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ICoreMulticallV1 } from "../../../core/CoreMulticall/v1/ICoreMulticallV1.sol";
import { SwapPayload } from "../../../base/BaseSwap.sol";
import { IBasePermissionedExecution } from "../../../base/BasePermissionedExecution/IBasePermissionedExecution.sol";

interface ILLSDStrategyV1 is ICoreMulticallV1, IBasePermissionedExecution {
    event Enter(
        uint256 collateral,
        uint256 collateralDelta,
        uint256 debt,
        uint256 debtDelta,
        address[] dryAssets,
        int256[] dryBalanceDeltas,
        uint256 ltv
    );

    event Exit(
        uint256 collateral,
        uint256 collateralDelta,
        uint256 debt,
        uint256 debtDelta,
        address[] dryAssets,
        int256[] dryBalanceDeltas,
        uint256 ltv
    );

    event SweepDust(uint256 collateral, uint256 collateralDelta, uint256 debt, uint256 debtDelta, uint256 ltv);

    struct EnterContext {
        uint256 flashloanAmount;
        SwapPayload swapPayload;
        uint256 maxLTV;
    }

    struct ExitContext {
        uint256 flashloanAmount;
        uint256 repayAmount;
        uint256 decollateralizeAmount;
        SwapPayload swapPayload;
        uint256 maxLTV;
    }

    enum FlashLoanContextType {
        ENTER,
        EXIT
    }

    function STAKED_TOKEN() external view returns (address);

    function STAKING_TOKEN() external view returns (address);

    /**
     * @notice  Enter or increase leverage using a flashloan.
     *     Steps:
     *     1.   Flashloan `flashloanAmount` of the staking asset (eg: WETH)
     *     2a.  On chains that support staking, stake the entire dry balance of the staking token (eg: WETH)
     *     2b.  All other chains, the `swapPayload` will swap `flashloanAmount` to the staked asset
     *     3.   Collateralize strategy balance of `dry` staked token (eg: wstETH)
     *     4.   Borrow `flashloanAmount`
     *     5.   Repay flashloan
     *     6.   Verify LTV is below inputted threshold
     * @dev Swapping is only initiated if `SwapPayload.amount` > 0.
     * @dev 2b: `SwapPayload.amount` determines the amount of staking asset to swap
     * @param flashloanAmount   Amount to flashloan
     * @param swapPayload       Swaps to staked asset when native staking is not possible.
     *                          Not used on chains that support native staking.
     * @param maxLTV            Verify LTV at the end of the operation
     */
    function enter(uint256 flashloanAmount, SwapPayload calldata swapPayload, uint256 maxLTV) external;

    /**
     * @notice  Enter or increase leverage using multicall looping.
     *     Steps:
     *     1.   Collateralize strategy balance of `dry` staked asset (eg: wstETH)
     *     2.   Borrow staking asset
     *     3a.  On chains that support staking, stake the entire dry balance of the staking token (eg: WETH)
     *     3b.  All other chains, the `swapPayload` will swap `flashloanAmount` to the staked asset
     *     4.   Verify LTV is below inputted threshold
     * @dev Swapping is only initiated if `SwapPayload.amount` > 0.
     *      This can occur to allow users to withdraw the staked asset.
     * @param borrowAmount      Amount to borrow
     * @param swapPayload       Swaps in to staked asset when native staking is not possible.
     * *                        Not used on chains that support native staking.
     * @param maxLTV            Verify LTV at the end of the operation
     */
    function enterMulticall(uint256 borrowAmount, SwapPayload calldata swapPayload, uint256 maxLTV) external;

    /**
     * @notice Exit or decrease leverage using a flashloan.
     *     Steps:
     *     1.   Flashloan `flashloanAmount` of the staking asset (eg: WETH)
     *     2.   Repay `repayAmount`
     *     3.   Decollateralize `flashloanAmount`
     *     4a.  On chains that support unstaking, unstake `flashloanAmount`
     *     4b.  All other chains, `swapPayload` will swap `decollateralizeAmount` out of the staked asset
     *     5.   Repay `flashloanAmount`
     *     6.   Verify LTV is below inputted threshold
     * @dev `flashloanAmount` less `repayAmount` is the amount of the staking asset to leave dry.
     * @dev Swapping is only initiated if `SwapPayload.amount` > 0.
     *      This can occur to allow users to withdraw the staked asset.
     * @param flashloanAmount   Amount to flashloan
     * @param repayAmount       Amount of `flashloanAmount` to repay
     * @param decollateralizeAmount       Amount of staked asset to remove as collateral
     * @param swapPayload       Swaps to staking asset when native unstaking is not possible
     *                          On chains that support unstaking, `SwapPayload.amount` is used to unstake
     * @param maxLTV            Verify LTV at the end of the operation
     */
    function exit(
        uint256 flashloanAmount,
        uint256 repayAmount,
        uint256 decollateralizeAmount,
        SwapPayload calldata swapPayload,
        uint256 maxLTV
    ) external;

    /**
     * @notice Exit or decrease leverage using multicall looping.
     *     Steps:
     *     1.   Decollateralize `decollateralizeAmount`
     *     2a.  On chains that support unstaking, unstake `decollateralizeAmount`
     *     2b.  All other chains, `swapPayload` will swap `decollateralizeAmount` out of the staked asset
     *     3.   If `repayDebt` is `true`, repay using the min(output of swap from step 2, outstanding debt)
     *          Minimum amount is used to allow users to withdraw the staked asset.
     *          If `repayDebt` is `false`, no repayment will be made.
     *     4.   Verify LTV is below inputted threshold
     * @dev Swapping is only initiated if `SwapPayload.amount` > 0.
     *      This can occur to allow users to withdraw the staked asset.
     * @dev `repayDebt` can be set to `true` to allow users to withdraw the staking asset.
     * @param decollateralizeAmount Amount of staked asset to remove as collateral
     * @param swapPayload       Swaps to staking asset when native unstaking is not possible
     *                          On chains that support unstaking, `SwapPayload.amount` is used to unstake
     * @param repayDebt         Flag to repay decollateralized asset
     * @param maxLTV            Verify LTV at the end of the operation
     */
    function exitMulticall(
        uint256 decollateralizeAmount,
        SwapPayload calldata swapPayload,
        bool repayDebt,
        uint256 maxLTV
    ) external;

    /**
     * @notice  Vault balances of supplyable assets are supplied;
     *          vault balances of repayable assets are repaid
     */
    function sweepDust() external;

    // view functions

    function getDebtAmount() external view returns (uint256);

    function getCollateralAmount() external view returns (uint256);

    /// @notice Returns the oracle price of the debt asset in terms of the collateral asset
    function getCollateralToDebtPrice() external view returns (uint256 price, uint256 precision);

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

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { ILLSDStrategyV1 } from "./ILLSDStrategyV1.sol";
import { BaseSwap, CoreSwapConfig, SwapPayload } from "../../../base/BaseSwap.sol";
import { CoreMulticall } from "../../../core/CoreMulticall/v1/CoreMulticall.sol";
import { BaseAccessControl, CoreAccessControlConfig } from "../../../base/BaseAccessControl.sol";
import { DefinitiveAssets, IERC20 } from "../../../core/libraries/DefinitiveAssets.sol";
import { ExceededMaxLTV, InvalidRewardsClaim } from "../../../core/libraries/DefinitiveErrors.sol";
import { BaseFees, CoreFeesConfig } from "../../../base/BaseFees.sol";
import { BasePermissionedExecution } from "../../../base/BasePermissionedExecution/BasePermissionedExecution.sol";
import { BaseSafeHarborMode } from "../../../base/BaseSafeHarborMode/BaseSafeHarborMode.sol";
import { BaseRewards } from "../../../base/BaseRewards.sol";

struct LLSDStrategyConfig {
    address stakingToken;
    address stakedToken;
}

abstract contract LLSDStrategy is
    ILLSDStrategyV1,
    BaseSwap,
    CoreMulticall,
    BasePermissionedExecution,
    BaseSafeHarborMode,
    BaseRewards
{
    address[] internal DRY_TOKENS;

    constructor(
        CoreAccessControlConfig memory coreAccessControlConfig,
        CoreSwapConfig memory coreSwapConfig,
        CoreFeesConfig memory coreFeesConfig,
        LLSDStrategyConfig memory llsdConfig
    ) BaseAccessControl(coreAccessControlConfig) BaseSwap(coreSwapConfig) BaseFees(coreFeesConfig) {
        DRY_TOKENS = new address[](2);
        DRY_TOKENS[0] = llsdConfig.stakedToken;
        DRY_TOKENS[1] = llsdConfig.stakingToken;
    }

    function STAKED_TOKEN() public view returns (address) {
        return DRY_TOKENS[0];
    }

    function STAKING_TOKEN() public view returns (address) {
        return DRY_TOKENS[1];
    }

    modifier emitEvent(FlashLoanContextType _type) {
        (uint256 collateralBefore, uint256 debtBefore, int256[] memory dryBalanceDeltas) = (
            getCollateralAmount(),
            getDebtAmount(),
            _getBalanceDeltas(new int256[](2))
        );

        _;

        emitEnterOrExitEvent(collateralBefore, debtBefore, dryBalanceDeltas, _type);
    }

    modifier enforceMaxLTV(uint256 maxLTV) {
        _;

        // Confirm LTV is below maxLTV
        if (getLTV() > maxLTV) {
            revert ExceededMaxLTV();
        }
    }

    function emitEnterOrExitEvent(
        uint256 collateralBefore,
        uint256 debtBefore,
        int256[] memory dryBalancesBefore,
        FlashLoanContextType _type
    ) internal {
        (uint256 collateralAfter, uint256 debtAfter, int256[] memory dryBalanceDeltas, uint256 ltv) = (
            getCollateralAmount(),
            getDebtAmount(),
            _getBalanceDeltas(dryBalancesBefore),
            getLTV()
        );

        if (_type == FlashLoanContextType.ENTER) {
            // Upon enter, collateral and debt amounts can not decrease
            emit Enter(
                collateralAfter,
                collateralAfter - collateralBefore,
                debtAfter,
                debtAfter - debtBefore,
                DRY_TOKENS,
                dryBalanceDeltas,
                ltv
            );
        } else if (_type == FlashLoanContextType.EXIT) {
            // Upon exit, collateral and debt amounts can not increase
            emit Exit(
                collateralAfter,
                collateralBefore - collateralAfter,
                debtAfter,
                debtBefore - debtAfter,
                DRY_TOKENS,
                dryBalanceDeltas,
                ltv
            );
        }
    }

    function enterMulticall(
        uint256 borrowAmount,
        SwapPayload calldata swapPayload,
        uint256 maxLTV
    )
        external
        virtual
        onlyWhitelisted
        stopGuarded
        nonReentrant
        enforceMaxLTV(maxLTV)
        emitEvent(FlashLoanContextType.ENTER)
    {
        address mSTAKED_TOKEN = STAKED_TOKEN();
        // Supply dry balances of staked token
        _supply(DefinitiveAssets.getBalance(mSTAKED_TOKEN));

        _borrow(borrowAmount);

        // Swap in to staked asset
        if (swapPayload.amount > 0) {
            SwapPayload[] memory swapPayloads = new SwapPayload[](1);
            swapPayloads[0] = swapPayload;
            _swap(swapPayloads, mSTAKED_TOKEN);
        }
    }

    function exitMulticall(
        uint256 decollateralizeAmount,
        SwapPayload calldata swapPayload,
        bool repayDebt,
        uint256 maxLTV
    ) external onlyWhitelisted stopGuarded nonReentrant enforceMaxLTV(maxLTV) emitEvent(FlashLoanContextType.EXIT) {
        // Decollateralize
        _decollateralize(decollateralizeAmount);

        address mSTAKING_TOKEN = STAKING_TOKEN();
        uint256 swapOutput = DefinitiveAssets.getBalance(mSTAKING_TOKEN);

        // Swap out of staked asset
        if (swapPayload.amount > 0) {
            SwapPayload[] memory swapPayloads = new SwapPayload[](1);
            swapPayloads[0] = swapPayload;
            _swap(swapPayloads, mSTAKING_TOKEN);

            // Store the amount of staking asset received from swap
            swapOutput = DefinitiveAssets.getBalance(mSTAKING_TOKEN) - swapOutput;
        }

        // Repay debt
        if (repayDebt) {
            // Repay the min of the swap output or the debt amount

            uint256 debtAmount = getDebtAmount();
            uint256 repayAmount = swapOutput < debtAmount ? swapOutput : debtAmount;
            _repay(repayAmount);
        }
    }

    function sweepDust() external onlyWhitelisted stopGuarded nonReentrant {
        (uint256 collateralBefore, uint256 debtBefore) = (getCollateralAmount(), getDebtAmount());

        if (collateralBefore > 0 && debtBefore > 0) {
            _repay(DefinitiveAssets.getBalance(STAKING_TOKEN()));
        }

        _supply(DefinitiveAssets.getBalance(STAKED_TOKEN()));

        (uint256 collateralAfter, uint256 debtAfter) = (getCollateralAmount(), getDebtAmount());

        emit SweepDust(
            collateralAfter,
            collateralAfter - collateralBefore,
            debtAfter,
            debtBefore - debtAfter,
            getLTV()
        );
    }

    function getCollateralAmount() public view virtual returns (uint256);

    function getDebtAmount() public view virtual returns (uint256);

    function getLTV() public view virtual returns (uint256);

    /// @dev By default, `unclaimedRewards()` will return 0 tokens + 0 reward amounts
    function unclaimedRewards()
        public
        view
        virtual
        override
        returns (IERC20[] memory rewardTokens, uint256[] memory earnedAmounts)
    {}

    function _borrow(uint256 amount) internal virtual;

    function _decollateralize(uint256 amount) internal virtual;

    function _repay(uint256 amount) internal virtual;

    function _supply(uint256 amount) internal virtual;

    /// @dev By default, `_claimAllRewards()` will revert
    function _claimAllRewards() internal virtual override returns (IERC20[] memory, uint256[] memory) {
        revert InvalidRewardsClaim();
    }

    function _getBalanceDeltas(
        int256[] memory previousDryBalances
    ) internal view returns (int256[] memory dryBalanceDeltas) {
        address[] memory mDryAssets = DRY_TOKENS;
        dryBalanceDeltas = new int256[](mDryAssets.length);
        uint256 length = mDryAssets.length;
        uint256 i = 0;
        while (i < length) {
            dryBalanceDeltas[i] = int256(DefinitiveAssets.getBalance(mDryAssets[i])) - previousDryBalances[i];
            unchecked {
                ++i;
            }
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { BaseNativeWrapper, BaseNativeWrapperConfig } from "../../base/BaseNativeWrapper/v1/BaseNativeWrapper.sol";
import { IWETH9 } from "../../vendor/interfaces/IWETH9.sol";

abstract contract WETH9NativeWrapper is BaseNativeWrapper {
    constructor(BaseNativeWrapperConfig memory config) BaseNativeWrapper(config) {}

    function _wrap(uint256 amount) internal override {
        // slither-disable-next-line arbitrary-send-eth
        IWETH9(WRAPPED_NATIVE_ASSET_ADDRESS).deposit{ value: amount }();
    }

    function _unwrap(uint256 amount) internal override {
        IWETH9(WRAPPED_NATIVE_ASSET_ADDRESS).withdraw(amount);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import {
    IFlashLoanRecipient,
    IERC20 as BalancerIERC20
} from "@balancer-labs/v2-interfaces/contracts/vault/IFlashLoanRecipient.sol";
import { IVault } from "@balancer-labs/v2-interfaces/contracts/vault/IVault.sol";
import { DefinitiveAssets, IERC20 } from "../../core/libraries/DefinitiveAssets.sol";
import { UnauthenticatedFlashloan, UntrustedFlashLoanSender } from "../../core/libraries/DefinitiveErrors.sol";

abstract contract BalancerFlashloanBase {
    using DefinitiveAssets for IERC20;

    address private constant BALANCER_VAULT = 0xBA12222222228d8Ba445958a75a0704d566BF2C8;
    bool private isAuthenticated;

    function initiateFlashLoan(address borrowToken, uint256 amount, bytes memory userData) internal {
        (BalancerIERC20[] memory tokens, uint256[] memory amounts) = (new BalancerIERC20[](1), new uint256[](1));
        tokens[0] = BalancerIERC20(borrowToken);
        amounts[0] = amount;
        isAuthenticated = true;
        IVault(BALANCER_VAULT).flashLoan(IFlashLoanRecipient(address(this)), tokens, amounts, userData);
    }

    function receiveFlashLoan(
        IERC20[] memory tokens,
        uint256[] memory amounts,
        uint256[] memory feeAmounts,
        bytes memory userData
    ) external {
        // we must enforce that only the flashloan provider vault can call this function
        if (msg.sender != BALANCER_VAULT) {
            revert UntrustedFlashLoanSender(msg.sender);
        }

        // Enforce we initiated the flashloan
        if (!isAuthenticated) {
            revert UnauthenticatedFlashloan();
        }

        // Reset authentication
        isAuthenticated = false;

        onFlashLoanReceived(address(tokens[0]), amounts[0], feeAmounts[0], userData);

        // Send tokens back to the balancer vault
        // slither-disable-next-line arbitrary-send-erc20
        tokens[0].safeTransfer(BALANCER_VAULT, amounts[0] + feeAmounts[0]);
    }

    function onFlashLoanReceived(
        address token,
        uint256 amount,
        uint256 feeAmount,
        bytes memory userData
    ) internal virtual;
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

/**
 * @dev IComet source code https://etherscan.io/address/0xea270ca1b5133e58f935a035f3bc5da53975fa9c#code
 */
interface IComet {
    /* solhint-disable explicit-types */
    event Supply(address indexed from, address indexed dst, uint256 amount);
    event Withdraw(address indexed src, address indexed to, uint amount);

    event SupplyCollateral(address indexed from, address indexed dst, address indexed asset, uint amount);

    event WithdrawCollateral(address indexed src, address indexed to, address indexed asset, uint amount);

    function supply(address asset, uint amount) external;

    function withdraw(address asset, uint amount) external;

    function balanceOf(address account) external view returns (uint256);

    function borrowBalanceOf(address account) external view returns (uint256);

    function collateralBalanceOf(address account, address asset) external view returns (uint128);

    function getPrice(address priceFeed) external view returns (uint256);

    function getAssetInfoByAddress(
        address asset
    )
        external
        view
        returns (
            uint8 offset,
            address assetAddress,
            address priceFeed,
            uint64 scale,
            uint64 borrowCollateralFactor,
            uint64 liquidateCollateralFactor,
            uint64 liquidationFactor,
            uint128 supplyCap
        );

    /* solhint-disable explicit-types */
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.18;

import { IComet } from "../../../protocols/compound/Interfaces.sol";
import { DefinitiveAssets, IERC20 } from "../../../core/libraries/DefinitiveAssets.sol";

abstract contract CompoundV3 {
    using DefinitiveAssets for IERC20;

    address public immutable COMET_ADDRESS;

    constructor(address _cometAddress) {
        COMET_ADDRESS = _cometAddress;
    }

    function supply(address asset, uint256 amount) internal {
        if (amount > 0) {
            IERC20(asset).resetAndSafeIncreaseAllowance(address(this), COMET_ADDRESS, amount);

            IComet(COMET_ADDRESS).supply(asset, amount);
        }
    }

    function borrow(address asset, uint256 amount) internal {
        if (amount > 0) {
            IComet(COMET_ADDRESS).withdraw(asset, amount);
        }
    }

    /// @dev If `amount` is type(uint256).max, the entire debt balance will be used.
    function repay(address asset, uint256 amount) internal {
        uint256 debtAmount = _getTotalVariableDebt();
        if (amount > debtAmount) {
            return supply(asset, debtAmount);
        }

        return supply(asset, amount);
    }

    /// @dev If `amount` is type(uint256).max, the entire collateral balance will be used.
    function decollateralize(address asset, uint256 amount) internal {
        uint256 collateralAmount = _getTotalCollateral(asset);
        if (amount > collateralAmount) {
            return borrow(asset, collateralAmount);
        }

        return borrow(asset, amount);
    }

    function _getTotalCollateral(address asset) internal view returns (uint256) {
        return IComet(COMET_ADDRESS).collateralBalanceOf(address(this), asset);
    }

    function _getLTV(address asset) internal view returns (uint256) {
        IComet comet = IComet(COMET_ADDRESS);
        (uint256 borrowAmount, uint256 collateralAmount) = (
            comet.borrowBalanceOf(address(this)),
            comet.collateralBalanceOf(address(this), asset)
        );
        (uint256 price, uint256 precision) = _getOraclePrice(asset);

        // LTV Basis Points Precision: 1e4
        return collateralAmount * price == 0 ? 0 : (borrowAmount * 1e4 * precision) / (collateralAmount * price);
    }

    function _getTotalVariableDebt() internal view returns (uint256) {
        return IComet(COMET_ADDRESS).borrowBalanceOf(address(this));
    }

    function _getOraclePrice(address tokenAddress) internal view returns (uint256 price, uint256 precision) {
        (, , address tokenPriceFeed, , , , , ) = IComet(COMET_ADDRESS).getAssetInfoByAddress(tokenAddress);

        return (
            IComet(COMET_ADDRESS).getPrice(tokenPriceFeed),
            1e8 // 1e8 is the precision of the price feed
        );
    }
}

// SPDX-License-Identifier: AGPLv3
pragma solidity >=0.8.18;

import { InvalidCalldata } from "../../core/libraries/DefinitiveErrors.sol";

/**
 * @title Call utilities library that is absent from the OpenZeppelin
 * @author Superfluid
 * Forked from
 * https://github.com/superfluid-finance/protocol-monorepo/blob
 * /d473b4876a689efb3bbb05552040bafde364a8b2/packages/ethereum-contracts/contracts/libs/CallUtils.sol
 * (Separated by 2 lines to prevent going over 120 character per line limit)
 */
library CallUtils {
    /// @dev Bubble up the revert from the returnedData (supports Panic, Error & Custom Errors)
    /// @notice This is needed in order to provide some human-readable revert message from a call
    /// @param returnedData Response of the call
    function revertFromReturnedData(bytes memory returnedData) internal pure {
        if (returnedData.length < 4) {
            // case 1: catch all
            revert("CallUtils: target revert()"); // solhint-disable-line custom-errors
        } else {
            bytes4 errorSelector;
            // solhint-disable-next-line no-inline-assembly
            assembly {
                errorSelector := mload(add(returnedData, 0x20))
            }
            if (errorSelector == bytes4(0x4e487b71) /* `seth sig "Panic(uint256)"` */) {
                // case 2: Panic(uint256) (Defined since 0.8.0)
                // solhint-disable-next-line max-line-length
                // ref: https://docs.soliditylang.org/en/v0.8.0/control-structures.html#panic-via-assert-and-error-via-require)
                string memory reason = "CallUtils: target panicked: 0x__";
                uint256 errorCode;
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    errorCode := mload(add(returnedData, 0x24))
                    let reasonWord := mload(add(reason, 0x20))
                    // [0..9] is converted to ['0'..'9']
                    // [0xa..0xf] is not correctly converted to ['a'..'f']
                    // but since panic code doesn't have those cases, we will ignore them for now!
                    let e1 := add(and(errorCode, 0xf), 0x30)
                    let e2 := shl(8, add(shr(4, and(errorCode, 0xf0)), 0x30))
                    reasonWord := or(
                        and(reasonWord, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff0000),
                        or(e2, e1)
                    )
                    mstore(add(reason, 0x20), reasonWord)
                }
                revert(reason);
            } else {
                // case 3: Error(string) (Defined at least since 0.7.0)
                // case 4: Custom errors (Defined since 0.8.0)
                uint256 len = returnedData.length;
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    revert(add(returnedData, 32), len)
                }
            }
        }
    }

    /**
     * @dev Helper method to parse data and extract the method signature (selector).
     *
     * Copied from: https://github.com/argentlabs/argent-contracts/
     * blob/master/contracts/modules/common/Utils.sol#L54-L60
     */
    function parseSelector(bytes memory callData) internal pure returns (bytes4 selector) {
        if (callData.length < 4) {
            revert InvalidCalldata();
        }
        // solhint-disable-next-line no-inline-assembly
        assembly {
            selector := mload(add(callData, 0x20))
        }
    }

    /**
     * @dev Pad length to 32 bytes word boundary
     */
    function padLength32(uint256 len) internal pure returns (uint256 paddedLen) {
        return ((len / 32) + (((len & 31) > 0) /* rounding? */ ? 1 : 0)) * 32;
    }

    /**
     * @dev Validate if the data is encoded correctly with abi.encode(bytesData)
     *
     * Expected ABI Encode Layout:
     * | word 1      | word 2           | word 3           | the rest...
     * | data length | bytesData offset | bytesData length | bytesData + padLength32 zeros |
     */
    function isValidAbiEncodedBytes(bytes memory data) internal pure returns (bool) {
        if (data.length < 64) return false;
        uint256 bytesOffset;
        uint256 bytesLen;
        // bytes offset is always expected to be 32
        // solhint-disable-next-line no-inline-assembly
        assembly {
            bytesOffset := mload(add(data, 32))
        }
        if (bytesOffset != 32) return false;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            bytesLen := mload(add(data, 64))
        }
        // the data length should be bytesData.length + 64 + padded bytes length
        return data.length == 64 + padLength32(bytesLen);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.18;

interface IWETH9 {
    function balanceOf(address) external view returns (uint256);

    function deposit() external payable;

    function withdraw(uint256 wad) external;
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

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

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import {ERC20} from "../tokens/ERC20.sol";

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferETH(address to, uint256 amount) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        require(success, "ETH_TRANSFER_FAILED");
    }

    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument.
            mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }

        require(success, "TRANSFER_FROM_FAILED");
    }

    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "TRANSFER_FAILED");
    }

    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "APPROVE_FAILED");
    }
}

{
  "metadata": {
    "bytecodeHash": "none"
  },
  "optimizer": {
    "enabled": true,
    "runs": 850
  },
  "viaIR": false,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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

-----Decoded View---------------
Arg [0] : baseNativeWrapperConfig (tuple): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]
Arg [1] : coreAccessControlConfig (tuple): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]
Arg [2] : coreSwapConfig (tuple): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]
Arg [3] : coreFeesConfig (tuple): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]

-----Encoded View---------------
28 Constructor Arguments found :
Arg [0] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000160
Arg [3] : 0000000000000000000000003b016025cd3d213c5779e10fe94a35ba440bd1c9
Arg [4] : 000000000000000000000000a59c5bc33c9d705b738aa553b724d8c39324fd20
Arg [5] : 0000000000000000000000003b016025cd3d213c5779e10fe94a35ba440bd1c9
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [7] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [9] : 000000000000000000000000d056c0eee354b24fe7c5d4ee762c4d7574badac1
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [11] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [12] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [13] : 00000000000000000000000000000000000000000000000000000000000001c0
Arg [14] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [15] : 000000000000000000000000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Arg [16] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [17] : 0000000000000000000000007f39c581f595b53c5cb19bd0b3f8da6c935e2ca0
Arg [18] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [19] : 000000000000000000000000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Arg [20] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [21] : 0000000000000000000000007f39c581f595b53c5cb19bd0b3f8da6c935e2ca0
Arg [22] : 000000000000000000000000dac17f958d2ee523a2206206994597c13d831ec7
Arg [23] : 000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
Arg [24] : 0000000000000000000000006b175474e89094c44da98b954eedeac495271d0f
Arg [25] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [26] : 000000000000000000000000f155735395a323b2a12051b5bc076c2c49eebeb3
Arg [27] : 00000000000000000000000081261c3ae484d2c0873bbea019eaecebc0056f95