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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return 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 (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

/// @notice Simple single owner authorization mixin.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/auth/Owned.sol)
abstract contract Owned {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

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

    /*//////////////////////////////////////////////////////////////
                            OWNERSHIP STORAGE
    //////////////////////////////////////////////////////////////*/

    address public owner;

    modifier onlyOwner() virtual {
        require(msg.sender == owner, "UNAUTHORIZED");

        _;
    }

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

    constructor(address _owner) {
        owner = _owner;

        emit OwnershipTransferred(address(0), _owner);
    }

    /*//////////////////////////////////////////////////////////////
                             OWNERSHIP LOGIC
    //////////////////////////////////////////////////////////////*/

    function transferOwnership(address newOwner) public virtual onlyOwner {
        owner = newOwner;

        emit OwnershipTransferred(msg.sender, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

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

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

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

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

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

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

pragma solidity ^0.8.0;

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

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

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

//SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

interface IFluidVaultT1 {
    /// @notice returns the vault id
    function VAULT_ID() external view returns (uint256);

    /// @notice reads uint256 data `result_` from storage at a bytes32 storage `slot_` key.
    function readFromStorage(bytes32 slot_) external view returns (uint256 result_);

    struct ConstantViews {
        address liquidity;
        address factory;
        address adminImplementation;
        address secondaryImplementation;
        address supplyToken;
        address borrowToken;
        uint8 supplyDecimals;
        uint8 borrowDecimals;
        uint vaultId;
        bytes32 liquiditySupplyExchangePriceSlot;
        bytes32 liquidityBorrowExchangePriceSlot;
        bytes32 liquidityUserSupplySlot;
        bytes32 liquidityUserBorrowSlot;
    }

    /// @notice returns all Vault constants
    function constantsView() external view returns (ConstantViews memory constantsView_);

    /// @notice fetches the latest user position after a liquidation
    function fetchLatestPosition(
        int256 positionTick_,
        uint256 positionTickId_,
        uint256 positionRawDebt_,
        uint256 tickData_
    )
        external
        view
        returns (
            int256, // tick
            uint256, // raw debt
            uint256, // raw collateral
            uint256, // branchID_
            uint256 // branchData_
        );

    /// @notice calculates the updated vault exchange prices
    function updateExchangePrices(
        uint256 vaultVariables2_
    )
        external
        view
        returns (
            uint256 liqSupplyExPrice_,
            uint256 liqBorrowExPrice_,
            uint256 vaultSupplyExPrice_,
            uint256 vaultBorrowExPrice_
        );

    /// @notice calculates the updated vault exchange prices and writes them to storage
    function updateExchangePricesOnStorage()
        external
        returns (
            uint256 liqSupplyExPrice_,
            uint256 liqBorrowExPrice_,
            uint256 vaultSupplyExPrice_,
            uint256 vaultBorrowExPrice_
        );

    /// @notice returns the liquidity contract address
    function LIQUIDITY() external view returns (address);

    function operate(
        uint256 nftId_, // if 0 then new position
        int256 newCol_, // if negative then withdraw
        int256 newDebt_, // if negative then payback
        address to_ // address at which the borrow & withdraw amount should go to. If address(0) then it'll go to msg.sender
    )
        external
        payable
        returns (
            uint256, // nftId_
            int256, // final supply amount. if - then withdraw
            int256 // final borrow amount. if - then payback
        );
    
    function liquidate(
        uint256 debtAmt_,
        uint256 colPerUnitDebt_, // min collateral needed per unit of debt in 1e18
        address to_,
        bool absorb_
    ) external payable returns (uint actualDebtAmt_, uint actualColAmt_);

    function absorb() external;

    function rebalance() external payable returns (int supplyAmt_, int borrowAmt_);

    error FluidLiquidateResult(uint256 colLiquidated, uint256 debtLiquidated);
}

//SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IWETH9 is IERC20 {
    function deposit() external payable;

    function withdraw(uint256 wad) external;
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.21;

import { Owned } from "solmate/src/auth/Owned.sol";

import { IFluidVaultT1 } from "../../protocols/vault/interfaces/iVaultT1.sol";
import { IERC20 } from "@openzeppelin/contracts/interfaces/IERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IWETH9 } from "../../protocols/lending/interfaces/external/iWETH9.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";

interface InstaFlashInterface {
    function flashLoan(address[] memory tokens, uint256[] memory amts, uint route, bytes memory data, bytes memory extraData) external;
}

interface InstaFlashReceiverInterface {
    function executeOperation(
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata premiums,
        address initiator,
        bytes calldata _data
    ) external returns (bool);
}

contract VaultT1Liquidator is Owned {
    using SafeERC20 for IERC20;

    address constant public ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    InstaFlashInterface immutable public FLA;
    IWETH9 immutable public WETH;

    mapping (address => bool) public rebalancer; 

    error FluidVaultT1Liquidator__InvalidOperation();

    event Liquidated(
        address indexed vault,
        uint256 collateral,
        uint256 debt
    );

    event Withdraw(
        address indexed to,
        address indexed token,
        uint256 amount
    );

    event ToggleRebalancer(
        address indexed rebalancer,
        bool indexed status
    );

    struct LiquidationParams {
        address vault;
        address supply;
        address borrow;
        uint256 supplyAmount;
        uint256 borrowAmount;
        uint256 colPerUnitDebt;
        bool absorb;
        address swapRouter;
        address swapApproval;
        bytes swapData;
        uint256 route;
    }

    constructor (
        address owner_,
        address fla_,
        address weth_,
        address[] memory rebalancers_
    ) Owned(owner_) {
        FLA = InstaFlashInterface(fla_);
        WETH = IWETH9(weth_);
        for (uint256 i = 0; i < rebalancers_.length; i++) {
            rebalancer[rebalancers_[i]] = true;
            emit ToggleRebalancer(rebalancers_[i], true);
        }
    }

    modifier isRebalancer() {
        if (!rebalancer[msg.sender] && msg.sender != owner) {
            revert FluidVaultT1Liquidator__InvalidOperation();
        }
        _;
    }

    function toggleRebalancer(address rebalancer_, bool status_) public onlyOwner {
        rebalancer[rebalancer_] = status_;
        emit ToggleRebalancer(rebalancer_, status_);
    }

    function spell(address[] memory targets_, bytes[] memory calldatas_) public onlyOwner {
        for (uint256 i = 0; i < targets_.length; i++) {
            Address.functionDelegateCall(targets_[i], calldatas_[i]);
        }
    }

    function withdraw(address to_, address[] memory tokens_, uint256[] memory amounts_) public onlyOwner {
        for (uint i = 0; i < tokens_.length; i++) {
            if (tokens_[i] == ETH_ADDRESS) {
                Address.sendValue(payable(to_), amounts_[i]);
            } else {
                IERC20(tokens_[i]).safeTransfer(to_, amounts_[i]);
            }
            emit Withdraw(to_, tokens_[i], amounts_[i]);
        }
    }
    
    function liquidation(LiquidationParams memory params_) public isRebalancer {
        address[] memory tokens = new address[](1);
        uint256[] memory amts = new uint256[](1);

        // Take flashloan in borrow token of the vault
        tokens[0] = params_.borrow == ETH_ADDRESS ? address(WETH) : params_.borrow;
        amts[0] = params_.borrowAmount;

        bytes memory data_ = abi.encode(params_);

        FLA.flashLoan(tokens, amts, params_.route, data_, abi.encode());

    }

    function executeOperation(
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata premiums,
        address initiator,
        bytes calldata _data
    ) external returns (bool) {
        if (msg.sender != address(FLA)) revert FluidVaultT1Liquidator__InvalidOperation();
        if (initiator != address(this)) revert FluidVaultT1Liquidator__InvalidOperation();
        LiquidationParams memory params_ = abi.decode(_data, (LiquidationParams));

        {
            uint256 value_;
            if (params_.borrow != ETH_ADDRESS) {
                IERC20(params_.borrow).safeApprove(params_.vault, 0);
                IERC20(params_.borrow).safeApprove(params_.vault, params_.borrowAmount);
                value_ = 0;
            } else {
                WETH.withdraw(params_.borrowAmount);
                value_ = params_.borrowAmount;
            }

            (uint256 debtAmount_, uint256 collateralAmount_) = IFluidVaultT1(params_.vault).liquidate{value: value_}(params_.borrowAmount, params_.colPerUnitDebt, address(this), params_.absorb);

            if (params_.supply != ETH_ADDRESS) {
                IERC20(params_.supply).safeApprove(params_.swapApproval, 0);
                IERC20(params_.supply).safeApprove(params_.swapApproval, params_.supplyAmount);
                value_ = 0;
            } else {
                value_ = params_.supplyAmount;
            }

            Address.functionCallWithValue(params_.swapRouter, params_.swapData, value_, "Swap: failed");
            emit Liquidated(params_.vault, collateralAmount_, debtAmount_);
        }

        uint256 flashloanAmount_ = amounts[0] + premiums[0] + 10;
        if (params_.borrow == ETH_ADDRESS) {
            uint256 wethBalance_ = WETH.balanceOf(address(this));
            if (wethBalance_ < flashloanAmount_) {
                WETH.deposit{value: flashloanAmount_ - wethBalance_}();
            }
        }
        IERC20(assets[0]).safeTransfer(msg.sender, flashloanAmount_);

        return true;
    }

    receive() payable external {}
}

{
  "compilationTarget": {
    "contracts/periphery/liquidation/main.sol": "VaultT1Liquidator"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 10000000
  },
  "remappings": []
}