// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import {IERC721Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol";
import {IERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import {SafeERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import {ERC721HolderUpgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC721/utils/ERC721HolderUpgradeable.sol";

import {ILendPool} from "../interfaces/ILendPool.sol";
import {ILendPoolLoan} from "../interfaces/ILendPoolLoan.sol";
import {ILendPoolAddressesProvider} from "../interfaces/ILendPoolAddressesProvider.sol";
import {IPunks} from "../interfaces/IPunks.sol";
import {IWrappedPunks} from "../interfaces/IWrappedPunks.sol";
import {IPunkGateway} from "../interfaces/IPunkGateway.sol";
import {DataTypes} from "../libraries/types/DataTypes.sol";
import {IWETHGateway} from "../interfaces/IWETHGateway.sol";

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

contract PunkGateway is IPunkGateway, ERC721HolderUpgradeable, EmergencyTokenRecoveryUpgradeable {
  using SafeERC20Upgradeable for IERC20Upgradeable;

  ILendPoolAddressesProvider internal _addressProvider;
  IWETHGateway internal _wethGateway;

  IPunks public punks;
  IWrappedPunks public wrappedPunks;
  address public proxy;

  function initialize(
    address addressProvider,
    address wethGateway,
    address _punks,
    address _wrappedPunks
  ) public initializer {
    __ERC721Holder_init();
    __EmergencyTokenRecovery_init();

    _addressProvider = ILendPoolAddressesProvider(addressProvider);
    _wethGateway = IWETHGateway(wethGateway);

    punks = IPunks(_punks);
    wrappedPunks = IWrappedPunks(_wrappedPunks);
    wrappedPunks.registerProxy();
    proxy = wrappedPunks.proxyInfo(address(this));

    IERC721Upgradeable(address(wrappedPunks)).setApprovalForAll(address(_getLendPool()), true);
    IERC721Upgradeable(address(wrappedPunks)).setApprovalForAll(address(_wethGateway), true);
  }

  function _getLendPool() internal view returns (ILendPool) {
    return ILendPool(_addressProvider.getLendPool());
  }

  function _getLendPoolLoan() internal view returns (ILendPoolLoan) {
    return ILendPoolLoan(_addressProvider.getLendPoolLoan());
  }

  function authorizeLendPoolERC20(address[] calldata tokens) external onlyOwner {
    for (uint256 i = 0; i < tokens.length; i++) {
      IERC20Upgradeable(tokens[i]).approve(address(_getLendPool()), type(uint256).max);
    }
  }

  function _depositPunk(uint256 punkIndex) internal {
    ILendPoolLoan cachedPoolLoan = _getLendPoolLoan();

    uint256 loanId = cachedPoolLoan.getCollateralLoanId(address(wrappedPunks), punkIndex);
    if (loanId != 0) {
      return;
    }

    address owner = punks.punkIndexToAddress(punkIndex);
    require(owner == _msgSender(), "PunkGateway: not owner of punkIndex");

    punks.buyPunk(punkIndex);
    punks.transferPunk(proxy, punkIndex);

    wrappedPunks.mint(punkIndex);
  }

  function borrow(
    address reserveAsset,
    uint256 amount,
    uint256 punkIndex,
    address onBehalfOf,
    uint16 referralCode
  ) external override {
    ILendPool cachedPool = _getLendPool();

    _depositPunk(punkIndex);

    cachedPool.borrow(reserveAsset, amount, address(wrappedPunks), punkIndex, onBehalfOf, referralCode);
    IERC20Upgradeable(reserveAsset).transfer(onBehalfOf, amount);
  }

  function _withdrawPunk(uint256 punkIndex, address onBehalfOf) internal {
    address owner = wrappedPunks.ownerOf(punkIndex);
    require(owner == _msgSender(), "PunkGateway: caller is not owner");
    require(owner == onBehalfOf, "PunkGateway: onBehalfOf is not owner");

    wrappedPunks.safeTransferFrom(onBehalfOf, address(this), punkIndex);
    wrappedPunks.burn(punkIndex);
    punks.transferPunk(onBehalfOf, punkIndex);
  }

  function repay(uint256 punkIndex, uint256 amount) external override returns (uint256, bool) {
    ILendPool cachedPool = _getLendPool();
    ILendPoolLoan cachedPoolLoan = _getLendPoolLoan();

    uint256 loanId = cachedPoolLoan.getCollateralLoanId(address(wrappedPunks), punkIndex);
    require(loanId != 0, "PunkGateway: no loan with such punkIndex");
    (, , address reserve, ) = cachedPoolLoan.getLoanCollateralAndReserve(loanId);
    (, uint256 debt) = cachedPoolLoan.getLoanReserveBorrowAmount(loanId);
    address borrower = cachedPoolLoan.borrowerOf(loanId);

    if (amount > debt) {
      amount = debt;
    }

    IERC20Upgradeable(reserve).transferFrom(msg.sender, address(this), amount);

    (uint256 paybackAmount, bool burn) = cachedPool.repay(address(wrappedPunks), punkIndex, amount);

    if (burn) {
      require(borrower == _msgSender(), "PunkGateway: caller is not borrower");
      _withdrawPunk(punkIndex, borrower);
    }

    return (paybackAmount, burn);
  }

  function auction(
    uint256 punkIndex,
    uint256 bidPrice,
    address onBehalfOf
  ) external override {
    ILendPool cachedPool = _getLendPool();
    ILendPoolLoan cachedPoolLoan = _getLendPoolLoan();

    uint256 loanId = cachedPoolLoan.getCollateralLoanId(address(wrappedPunks), punkIndex);
    require(loanId != 0, "PunkGateway: no loan with such punkIndex");

    (, , address reserve, ) = cachedPoolLoan.getLoanCollateralAndReserve(loanId);

    IERC20Upgradeable(reserve).transferFrom(msg.sender, address(this), bidPrice);

    cachedPool.auction(address(wrappedPunks), punkIndex, bidPrice, onBehalfOf);
  }

  function redeem(uint256 punkIndex, uint256 amount) external override returns (uint256) {
    ILendPool cachedPool = _getLendPool();
    ILendPoolLoan cachedPoolLoan = _getLendPoolLoan();

    uint256 loanId = cachedPoolLoan.getCollateralLoanId(address(wrappedPunks), punkIndex);
    require(loanId != 0, "PunkGateway: no loan with such punkIndex");

    DataTypes.LoanData memory loan = cachedPoolLoan.getLoan(loanId);

    IERC20Upgradeable(loan.reserveAsset).transferFrom(msg.sender, address(this), amount);

    uint256 paybackAmount = cachedPool.redeem(address(wrappedPunks), punkIndex, amount);

    if (amount > paybackAmount) {
      IERC20Upgradeable(loan.reserveAsset).safeTransfer(msg.sender, (amount - paybackAmount));
    }

    return paybackAmount;
  }

  function liquidate(uint256 punkIndex, uint256 amount) external override returns (uint256) {
    ILendPool cachedPool = _getLendPool();
    ILendPoolLoan cachedPoolLoan = _getLendPoolLoan();

    uint256 loanId = cachedPoolLoan.getCollateralLoanId(address(wrappedPunks), punkIndex);
    require(loanId != 0, "PunkGateway: no loan with such punkIndex");

    DataTypes.LoanData memory loan = cachedPoolLoan.getLoan(loanId);
    require(loan.bidderAddress == _msgSender(), "PunkGateway: caller is not bidder");

    if (amount > 0) {
      IERC20Upgradeable(loan.reserveAsset).transferFrom(msg.sender, address(this), amount);
    }

    uint256 extraRetAmount = cachedPool.liquidate(address(wrappedPunks), punkIndex, amount);

    _withdrawPunk(punkIndex, loan.bidderAddress);

    if (amount > extraRetAmount) {
      IERC20Upgradeable(loan.reserveAsset).safeTransfer(msg.sender, (amount - extraRetAmount));
    }

    return (extraRetAmount);
  }

  function borrowETH(
    uint256 amount,
    uint256 punkIndex,
    address onBehalfOf,
    uint16 referralCode
  ) external override {
    _depositPunk(punkIndex);
    _wethGateway.borrowETH(amount, address(wrappedPunks), punkIndex, onBehalfOf, referralCode);
  }

  function repayETH(uint256 punkIndex, uint256 amount) external payable override returns (uint256, bool) {
    ILendPoolLoan cachedPoolLoan = _getLendPoolLoan();

    uint256 loanId = cachedPoolLoan.getCollateralLoanId(address(wrappedPunks), punkIndex);
    require(loanId != 0, "PunkGateway: no loan with such punkIndex");

    address borrower = cachedPoolLoan.borrowerOf(loanId);

    (uint256 paybackAmount, bool burn) = _wethGateway.repayETH{value: msg.value}(
      address(wrappedPunks),
      punkIndex,
      amount
    );

    if (burn) {
      require(borrower == _msgSender(), "PunkGateway: caller is not borrower");
      _withdrawPunk(punkIndex, borrower);
    }

    // refund remaining dust eth
    if (msg.value > paybackAmount) {
      _safeTransferETH(msg.sender, msg.value - paybackAmount);
    }

    return (paybackAmount, burn);
  }

  function auctionETH(uint256 punkIndex, address onBehalfOf) external payable override {
    _wethGateway.auctionETH{value: msg.value}(address(wrappedPunks), punkIndex, onBehalfOf);
  }

  function redeemETH(uint256 punkIndex, uint256 amount) external payable override returns (uint256) {
    ILendPoolLoan cachedPoolLoan = _getLendPoolLoan();

    uint256 loanId = cachedPoolLoan.getCollateralLoanId(address(wrappedPunks), punkIndex);
    require(loanId != 0, "PunkGateway: no loan with such punkIndex");

    //DataTypes.LoanData memory loan = cachedPoolLoan.getLoan(loanId);

    uint256 paybackAmount = _wethGateway.redeemETH{value: msg.value}(address(wrappedPunks), punkIndex, amount);

    // refund remaining dust eth
    if (msg.value > paybackAmount) {
      _safeTransferETH(msg.sender, msg.value - paybackAmount);
    }

    return paybackAmount;
  }

  function liquidateETH(uint256 punkIndex) external payable override returns (uint256) {
    ILendPoolLoan cachedPoolLoan = _getLendPoolLoan();

    uint256 loanId = cachedPoolLoan.getCollateralLoanId(address(wrappedPunks), punkIndex);
    require(loanId != 0, "PunkGateway: no loan with such punkIndex");

    DataTypes.LoanData memory loan = cachedPoolLoan.getLoan(loanId);
    require(loan.bidderAddress == _msgSender(), "PunkGateway: caller is not bidder");

    uint256 extraAmount = _wethGateway.liquidateETH{value: msg.value}(address(wrappedPunks), punkIndex);

    _withdrawPunk(punkIndex, loan.bidderAddress);

    // refund remaining dust eth
    if (msg.value > extraAmount) {
      _safeTransferETH(msg.sender, msg.value - extraAmount);
    }

    return extraAmount;
  }

  /**
   * @dev transfer ETH to an address, revert if it fails.
   * @param to recipient of the transfer
   * @param value the amount to send
   */
  function _safeTransferETH(address to, uint256 value) internal {
    (bool success, ) = to.call{value: value}(new bytes(0));
    require(success, "ETH_TRANSFER_FAILED");
  }

  /**
   * @dev
   */
  receive() external payable {}

  /**
   * @dev Revert fallback calls
   */
  fallback() external payable {
    revert("Fallback not allowed");
  }
}

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

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Context_init_unchained();
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721Upgradeable is IERC165Upgradeable {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";
import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    function safeTransfer(
        IERC20Upgradeable token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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));
        }
    }

    /**
     * @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(IERC20Upgradeable 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/ERC721/utils/ERC721Holder.sol)

pragma solidity ^0.8.0;

import "../IERC721ReceiverUpgradeable.sol";
import "../../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC721Receiver} interface.
 *
 * Accepts all token transfers.
 * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
 */
contract ERC721HolderUpgradeable is Initializable, IERC721ReceiverUpgradeable {
    function __ERC721Holder_init() internal onlyInitializing {
        __ERC721Holder_init_unchained();
    }

    function __ERC721Holder_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC721Receiver-onERC721Received}.
     *
     * Always returns `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }
    uint256[50] private __gap;
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

import {ILendPoolAddressesProvider} from "./ILendPoolAddressesProvider.sol";
import {DataTypes} from "../libraries/types/DataTypes.sol";

interface ILendPool {
  /**
   * @dev Emitted on deposit()
   * @param user The address initiating the deposit
   * @param amount The amount deposited
   * @param reserve The address of the underlying asset of the reserve
   * @param onBehalfOf The beneficiary of the deposit, receiving the bTokens
   * @param referral The referral code used
   **/
  event Deposit(
    address user,
    address indexed reserve,
    uint256 amount,
    address indexed onBehalfOf,
    uint16 indexed referral
  );

  /**
   * @dev Emitted on withdraw()
   * @param user The address initiating the withdrawal, owner of bTokens
   * @param reserve The address of the underlyng asset being withdrawn
   * @param amount The amount to be withdrawn
   * @param to Address that will receive the underlying
   **/
  event Withdraw(address indexed user, address indexed reserve, uint256 amount, address indexed to);

  /**
   * @dev Emitted on borrow() when loan needs to be opened
   * @param user The address of the user initiating the borrow(), receiving the funds
   * @param reserve The address of the underlying asset being borrowed
   * @param amount The amount borrowed out
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token id of the underlying NFT used as collateral
   * @param onBehalfOf The address that will be getting the loan
   * @param referral The referral code used
   **/
  event Borrow(
    address user,
    address indexed reserve,
    uint256 amount,
    address nftAsset,
    uint256 nftTokenId,
    address indexed onBehalfOf,
    uint256 borrowRate,
    uint256 loanId,
    uint16 indexed referral
  );

  /**
   * @dev Emitted on repay()
   * @param user The address of the user initiating the repay(), providing the funds
   * @param reserve The address of the underlying asset of the reserve
   * @param amount The amount repaid
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token id of the underlying NFT used as collateral
   * @param borrower The beneficiary of the repayment, getting his debt reduced
   * @param loanId The loan ID of the NFT loans
   **/
  event Repay(
    address user,
    address indexed reserve,
    uint256 amount,
    address indexed nftAsset,
    uint256 nftTokenId,
    address indexed borrower,
    uint256 loanId
  );

  /**
   * @dev Emitted when a borrower's loan is auctioned.
   * @param user The address of the user initiating the auction
   * @param reserve The address of the underlying asset of the reserve
   * @param bidPrice The price of the underlying reserve given by the bidder
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token id of the underlying NFT used as collateral
   * @param onBehalfOf The address that will be getting the NFT
   * @param loanId The loan ID of the NFT loans
   **/
  event Auction(
    address user,
    address indexed reserve,
    uint256 bidPrice,
    address indexed nftAsset,
    uint256 nftTokenId,
    address onBehalfOf,
    address indexed borrower,
    uint256 loanId
  );

  /**
   * @dev Emitted on redeem()
   * @param user The address of the user initiating the redeem(), providing the funds
   * @param reserve The address of the underlying asset of the reserve
   * @param borrowAmount The borrow amount repaid
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token id of the underlying NFT used as collateral
   * @param loanId The loan ID of the NFT loans
   **/
  event Redeem(
    address user,
    address indexed reserve,
    uint256 borrowAmount,
    uint256 fineAmount,
    address indexed nftAsset,
    uint256 nftTokenId,
    address indexed borrower,
    uint256 loanId
  );

  /**
   * @dev Emitted when a borrower's loan is liquidated.
   * @param user The address of the user initiating the auction
   * @param reserve The address of the underlying asset of the reserve
   * @param repayAmount The amount of reserve repaid by the liquidator
   * @param remainAmount The amount of reserve received by the borrower
   * @param loanId The loan ID of the NFT loans
   **/
  event Liquidate(
    address user,
    address indexed reserve,
    uint256 repayAmount,
    uint256 remainAmount,
    address indexed nftAsset,
    uint256 nftTokenId,
    address indexed borrower,
    uint256 loanId
  );

  /**
   * @dev Emitted when the pause is triggered.
   */
  event Paused();

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

  /**
   * @dev Emitted when the state of a reserve is updated. NOTE: This event is actually declared
   * in the ReserveLogic library and emitted in the updateInterestRates() function. Since the function is internal,
   * the event will actually be fired by the LendPool contract. The event is therefore replicated here so it
   * gets added to the LendPool ABI
   * @param reserve The address of the underlying asset of the reserve
   * @param liquidityRate The new liquidity rate
   * @param variableBorrowRate The new variable borrow rate
   * @param liquidityIndex The new liquidity index
   * @param variableBorrowIndex The new variable borrow index
   **/
  event ReserveDataUpdated(
    address indexed reserve,
    uint256 liquidityRate,
    uint256 variableBorrowRate,
    uint256 liquidityIndex,
    uint256 variableBorrowIndex
  );

  /**
   * @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying bTokens.
   * - E.g. User deposits 100 USDC and gets in return 100 bUSDC
   * @param reserve The address of the underlying asset to deposit
   * @param amount The amount to be deposited
   * @param onBehalfOf The address that will receive the bTokens, same as msg.sender if the user
   *   wants to receive them on his own wallet, or a different address if the beneficiary of bTokens
   *   is a different wallet
   * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
   *   0 if the action is executed directly by the user, without any middle-man
   **/
  function deposit(
    address reserve,
    uint256 amount,
    address onBehalfOf,
    uint16 referralCode
  ) external;

  /**
   * @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent bTokens owned
   * E.g. User has 100 bUSDC, calls withdraw() and receives 100 USDC, burning the 100 bUSDC
   * @param reserve The address of the underlying asset to withdraw
   * @param amount The underlying amount to be withdrawn
   *   - Send the value type(uint256).max in order to withdraw the whole bToken balance
   * @param to Address that will receive the underlying, same as msg.sender if the user
   *   wants to receive it on his own wallet, or a different address if the beneficiary is a
   *   different wallet
   * @return The final amount withdrawn
   **/
  function withdraw(
    address reserve,
    uint256 amount,
    address to
  ) external returns (uint256);

  /**
   * @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
   * already deposited enough collateral
   * - E.g. User borrows 100 USDC, receiving the 100 USDC in his wallet
   *   and lock collateral asset in contract
   * @param reserveAsset The address of the underlying asset to borrow
   * @param amount The amount to be borrowed
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   * @param onBehalfOf Address of the user who will receive the loan. Should be the address of the borrower itself
   * calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
   * if he has been given credit delegation allowance
   * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
   *   0 if the action is executed directly by the user, without any middle-man
   **/
  function borrow(
    address reserveAsset,
    uint256 amount,
    address nftAsset,
    uint256 nftTokenId,
    address onBehalfOf,
    uint16 referralCode
  ) external;

  /**
   * @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent loan owned
   * - E.g. User repays 100 USDC, burning loan and receives collateral asset
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   * @param amount The amount to repay
   * @return The final amount repaid, loan is burned or not
   **/
  function repay(
    address nftAsset,
    uint256 nftTokenId,
    uint256 amount
  ) external returns (uint256, bool);

  /**
   * @dev Function to auction a non-healthy position collateral-wise
   * - The caller (liquidator) want to buy collateral asset of the user getting liquidated
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   * @param bidPrice The bid price of the liquidator want to buy the underlying NFT
   * @param onBehalfOf Address of the user who will get the underlying NFT, same as msg.sender if the user
   *   wants to receive them on his own wallet, or a different address if the beneficiary of NFT
   *   is a different wallet
   **/
  function auction(
    address nftAsset,
    uint256 nftTokenId,
    uint256 bidPrice,
    address onBehalfOf
  ) external;

  /**
   * @notice Redeem a NFT loan which state is in Auction
   * - E.g. User repays 100 USDC, burning loan and receives collateral asset
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   * @param amount The amount to repay the debt and bid fine
   **/
  function redeem(
    address nftAsset,
    uint256 nftTokenId,
    uint256 amount
  ) external returns (uint256);

  /**
   * @dev Function to liquidate a non-healthy position collateral-wise
   * - The caller (liquidator) buy collateral asset of the user getting liquidated, and receives
   *   the collateral asset
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   **/
  function liquidate(
    address nftAsset,
    uint256 nftTokenId,
    uint256 amount
  ) external returns (uint256);

  /**
   * @dev Validates and finalizes an bToken transfer
   * - Only callable by the overlying bToken of the `asset`
   * @param asset The address of the underlying asset of the bToken
   * @param from The user from which the bTokens are transferred
   * @param to The user receiving the bTokens
   * @param amount The amount being transferred/withdrawn
   * @param balanceFromBefore The bToken balance of the `from` user before the transfer
   * @param balanceToBefore The bToken balance of the `to` user before the transfer
   */
  function finalizeTransfer(
    address asset,
    address from,
    address to,
    uint256 amount,
    uint256 balanceFromBefore,
    uint256 balanceToBefore
  ) external view;

  function getReserveConfiguration(address asset) external view returns (DataTypes.ReserveConfigurationMap memory);

  function getNftConfiguration(address asset) external view returns (DataTypes.NftConfigurationMap memory);

  /**
   * @dev Returns the normalized income normalized income of the reserve
   * @param asset The address of the underlying asset of the reserve
   * @return The reserve's normalized income
   */
  function getReserveNormalizedIncome(address asset) external view returns (uint256);

  /**
   * @dev Returns the normalized variable debt per unit of asset
   * @param asset The address of the underlying asset of the reserve
   * @return The reserve normalized variable debt
   */
  function getReserveNormalizedVariableDebt(address asset) external view returns (uint256);

  /**
   * @dev Returns the state and configuration of the reserve
   * @param asset The address of the underlying asset of the reserve
   * @return The state of the reserve
   **/
  function getReserveData(address asset) external view returns (DataTypes.ReserveData memory);

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

  function getNftData(address asset) external view returns (DataTypes.NftData memory);

  /**
   * @dev Returns the loan data of the NFT
   * @param nftAsset The address of the NFT
   * @param reserveAsset The address of the Reserve
   * @return totalCollateralInETH the total collateral in ETH of the NFT
   * @return totalCollateralInReserve the total collateral in Reserve of the NFT
   * @return availableBorrowsInETH the borrowing power in ETH of the NFT
   * @return availableBorrowsInReserve the borrowing power in Reserve of the NFT
   * @return ltv the loan to value of the user
   * @return liquidationThreshold the liquidation threshold of the NFT
   * @return liquidationBonus the liquidation bonus of the NFT
   **/
  function getNftCollateralData(address nftAsset, address reserveAsset)
    external
    view
    returns (
      uint256 totalCollateralInETH,
      uint256 totalCollateralInReserve,
      uint256 availableBorrowsInETH,
      uint256 availableBorrowsInReserve,
      uint256 ltv,
      uint256 liquidationThreshold,
      uint256 liquidationBonus
    );

  /**
   * @dev Returns the debt data of the NFT
   * @param nftAsset The address of the NFT
   * @param nftTokenId The token id of the NFT
   * @return loanId the loan id of the NFT
   * @return reserveAsset the address of the Reserve
   * @return totalCollateral the total power of the NFT
   * @return totalDebt the total debt of the NFT
   * @return availableBorrows the borrowing power left of the NFT
   * @return healthFactor the current health factor of the NFT
   **/
  function getNftDebtData(address nftAsset, uint256 nftTokenId)
    external
    view
    returns (
      uint256 loanId,
      address reserveAsset,
      uint256 totalCollateral,
      uint256 totalDebt,
      uint256 availableBorrows,
      uint256 healthFactor
    );

  /**
   * @dev Returns the auction data of the NFT
   * @param nftAsset The address of the NFT
   * @param nftTokenId The token id of the NFT
   * @return loanId the loan id of the NFT
   * @return bidderAddress the highest bidder address of the loan
   * @return bidPrice the highest bid price in Reserve of the loan
   * @return bidBorrowAmount the borrow amount in Reserve of the loan
   * @return bidFine the penalty fine of the loan
   **/
  function getNftAuctionData(address nftAsset, uint256 nftTokenId)
    external
    view
    returns (
      uint256 loanId,
      address bidderAddress,
      uint256 bidPrice,
      uint256 bidBorrowAmount,
      uint256 bidFine
    );

  function getNftLiquidatePrice(address nftAsset, uint256 nftTokenId)
    external
    view
    returns (uint256 liquidatePrice, uint256 paybackAmount);

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

  /**
   * @dev Set the _pause state of a reserve
   * - Only callable by the LendPool contract
   * @param val `true` to pause the reserve, `false` to un-pause it
   */
  function setPause(bool val) external;

  /**
   * @dev Returns if the LendPool is paused
   */
  function paused() external view returns (bool);

  function getAddressesProvider() external view returns (ILendPoolAddressesProvider);

  function initReserve(
    address asset,
    address bTokenAddress,
    address debtTokenAddress,
    address interestRateAddress
  ) external;

  function initNft(address asset, address bNftAddress) external;

  function setReserveInterestRateAddress(address asset, address rateAddress) external;

  function setReserveConfiguration(address asset, uint256 configuration) external;

  function setNftConfiguration(address asset, uint256 configuration) external;

  function setMaxNumberOfReserves(uint256 val) external;

  function setMaxNumberOfNfts(uint256 val) external;

  function getMaxNumberOfReserves() external view returns (uint256);

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

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

import {DataTypes} from "../libraries/types/DataTypes.sol";

interface ILendPoolLoan {
  /**
   * @dev Emitted on initialization to share location of dependent notes
   * @param pool The address of the associated lend pool
   */
  event Initialized(address indexed pool);

  /**
   * @dev Emitted when a loan is created
   * @param user The address initiating the action
   */
  event LoanCreated(
    address indexed user,
    address indexed onBehalfOf,
    uint256 indexed loanId,
    address nftAsset,
    uint256 nftTokenId,
    address reserveAsset,
    uint256 amount,
    uint256 borrowIndex
  );

  /**
   * @dev Emitted when a loan is updated
   * @param user The address initiating the action
   */
  event LoanUpdated(
    address indexed user,
    uint256 indexed loanId,
    address nftAsset,
    uint256 nftTokenId,
    address reserveAsset,
    uint256 amountAdded,
    uint256 amountTaken,
    uint256 borrowIndex
  );

  /**
   * @dev Emitted when a loan is repaid by the borrower
   * @param user The address initiating the action
   */
  event LoanRepaid(
    address indexed user,
    uint256 indexed loanId,
    address nftAsset,
    uint256 nftTokenId,
    address reserveAsset,
    uint256 amount,
    uint256 borrowIndex
  );

  /**
   * @dev Emitted when a loan is auction by the liquidator
   * @param user The address initiating the action
   */
  event LoanAuctioned(
    address indexed user,
    uint256 indexed loanId,
    address nftAsset,
    uint256 nftTokenId,
    uint256 amount,
    uint256 borrowIndex,
    address bidder,
    uint256 price,
    address previousBidder,
    uint256 previousPrice
  );

  /**
   * @dev Emitted when a loan is redeemed
   * @param user The address initiating the action
   */
  event LoanRedeemed(
    address indexed user,
    uint256 indexed loanId,
    address nftAsset,
    uint256 nftTokenId,
    address reserveAsset,
    uint256 amountTaken,
    uint256 borrowIndex
  );

  /**
   * @dev Emitted when a loan is liquidate by the liquidator
   * @param user The address initiating the action
   */
  event LoanLiquidated(
    address indexed user,
    uint256 indexed loanId,
    address nftAsset,
    uint256 nftTokenId,
    address reserveAsset,
    uint256 amount,
    uint256 borrowIndex
  );

  function initNft(address nftAsset, address bNftAddress) external;

  /**
   * @dev Create store a loan object with some params
   * @param initiator The address of the user initiating the borrow
   * @param onBehalfOf The address receiving the loan
   */
  function createLoan(
    address initiator,
    address onBehalfOf,
    address nftAsset,
    uint256 nftTokenId,
    address bNftAddress,
    address reserveAsset,
    uint256 amount,
    uint256 borrowIndex
  ) external returns (uint256);

  /**
   * @dev Update the given loan with some params
   *
   * Requirements:
   *  - The caller must be a holder of the loan
   *  - The loan must be in state Active
   * @param initiator The address of the user initiating the borrow
   */
  function updateLoan(
    address initiator,
    uint256 loanId,
    uint256 amountAdded,
    uint256 amountTaken,
    uint256 borrowIndex
  ) external;

  /**
   * @dev Repay the given loan
   *
   * Requirements:
   *  - The caller must be a holder of the loan
   *  - The caller must send in principal + interest
   *  - The loan must be in state Active
   *
   * @param initiator The address of the user initiating the repay
   * @param loanId The loan getting burned
   * @param bNftAddress The address of bNFT
   */
  function repayLoan(
    address initiator,
    uint256 loanId,
    address bNftAddress,
    uint256 amount,
    uint256 borrowIndex
  ) external;

  /**
   * @dev Auction the given loan
   *
   * Requirements:
   *  - The price must be greater than current highest price
   *  - The loan must be in state Active or Auction
   *
   * @param initiator The address of the user initiating the auction
   * @param loanId The loan getting auctioned
   * @param bidPrice The bid price of this auction
   */
  function auctionLoan(
    address initiator,
    uint256 loanId,
    address onBehalfOf,
    uint256 bidPrice,
    uint256 borrowAmount,
    uint256 borrowIndex
  ) external;

  /**
   * @dev Redeem the given loan with some params
   *
   * Requirements:
   *  - The caller must be a holder of the loan
   *  - The loan must be in state Auction
   * @param initiator The address of the user initiating the borrow
   */
  function redeemLoan(
    address initiator,
    uint256 loanId,
    uint256 amountTaken,
    uint256 borrowIndex
  ) external;

  /**
   * @dev Liquidate the given loan
   *
   * Requirements:
   *  - The caller must send in principal + interest
   *  - The loan must be in state Active
   *
   * @param initiator The address of the user initiating the auction
   * @param loanId The loan getting burned
   * @param bNftAddress The address of bNFT
   */
  function liquidateLoan(
    address initiator,
    uint256 loanId,
    address bNftAddress,
    uint256 borrowAmount,
    uint256 borrowIndex
  ) external;

  function borrowerOf(uint256 loanId) external view returns (address);

  function getCollateralLoanId(address nftAsset, uint256 nftTokenId) external view returns (uint256);

  function getLoan(uint256 loanId) external view returns (DataTypes.LoanData memory loanData);

  function getLoanCollateralAndReserve(uint256 loanId)
    external
    view
    returns (
      address nftAsset,
      uint256 nftTokenId,
      address reserveAsset,
      uint256 scaledAmount
    );

  function getLoanReserveBorrowScaledAmount(uint256 loanId) external view returns (address, uint256);

  function getLoanReserveBorrowAmount(uint256 loanId) external view returns (address, uint256);

  function getLoanHighestBid(uint256 loanId) external view returns (address, uint256);

  function getNftCollateralAmount(address nftAsset) external view returns (uint256);

  function getUserNftCollateralAmount(address user, address nftAsset) external view returns (uint256);
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

/**
 * @title LendPoolAddressesProvider contract
 * @dev Main registry of addresses part of or connected to the protocol, including permissioned roles
 * - Acting also as factory of proxies and admin of those, so with right to change its implementations
 * - Owned by the Bend Governance
 * @author Bend
 **/
interface ILendPoolAddressesProvider {
  event MarketIdSet(string newMarketId);
  event LendPoolUpdated(address indexed newAddress, bytes encodedCallData);
  event ConfigurationAdminUpdated(address indexed newAddress);
  event EmergencyAdminUpdated(address indexed newAddress);
  event LendPoolConfiguratorUpdated(address indexed newAddress, bytes encodedCallData);
  event ReserveOracleUpdated(address indexed newAddress);
  event NftOracleUpdated(address indexed newAddress);
  event LendPoolLoanUpdated(address indexed newAddress, bytes encodedCallData);
  event ProxyCreated(bytes32 id, address indexed newAddress);
  event AddressSet(bytes32 id, address indexed newAddress, bool hasProxy, bytes encodedCallData);
  event BNFTRegistryUpdated(address indexed newAddress);
  event LendPoolLiquidatorUpdated(address indexed newAddress);
  event IncentivesControllerUpdated(address indexed newAddress);
  event UIDataProviderUpdated(address indexed newAddress);
  event BendDataProviderUpdated(address indexed newAddress);
  event WalletBalanceProviderUpdated(address indexed newAddress);

  function getMarketId() external view returns (string memory);

  function setMarketId(string calldata marketId) external;

  function setAddress(bytes32 id, address newAddress) external;

  function setAddressAsProxy(
    bytes32 id,
    address impl,
    bytes memory encodedCallData
  ) external;

  function getAddress(bytes32 id) external view returns (address);

  function getLendPool() external view returns (address);

  function setLendPoolImpl(address pool, bytes memory encodedCallData) external;

  function getLendPoolConfigurator() external view returns (address);

  function setLendPoolConfiguratorImpl(address configurator, bytes memory encodedCallData) external;

  function getPoolAdmin() external view returns (address);

  function setPoolAdmin(address admin) external;

  function getEmergencyAdmin() external view returns (address);

  function setEmergencyAdmin(address admin) external;

  function getReserveOracle() external view returns (address);

  function setReserveOracle(address reserveOracle) external;

  function getNFTOracle() external view returns (address);

  function setNFTOracle(address nftOracle) external;

  function getLendPoolLoan() external view returns (address);

  function setLendPoolLoanImpl(address loan, bytes memory encodedCallData) external;

  function getBNFTRegistry() external view returns (address);

  function setBNFTRegistry(address factory) external;

  function getLendPoolLiquidator() external view returns (address);

  function setLendPoolLiquidator(address liquidator) external;

  function getIncentivesController() external view returns (address);

  function setIncentivesController(address controller) external;

  function getUIDataProvider() external view returns (address);

  function setUIDataProvider(address provider) external;

  function getBendDataProvider() external view returns (address);

  function setBendDataProvider(address provider) external;

  function getWalletBalanceProvider() external view returns (address);

  function setWalletBalanceProvider(address provider) external;
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

/**
 * @dev Interface for a permittable ERC721 contract
 * See https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC72 allowance (see {IERC721-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC721-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IPunks {
  function balanceOf(address account) external view returns (uint256);

  function punkIndexToAddress(uint256 punkIndex) external view returns (address owner);

  function buyPunk(uint256 punkIndex) external;

  function transferPunk(address to, uint256 punkIndex) external;
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

/**
 * @dev Interface for a permittable ERC721 contract
 * See https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC72 allowance (see {IERC721-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC721-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IWrappedPunks is IERC721 {
  function punkContract() external view returns (address);

  function mint(uint256 punkIndex) external;

  function burn(uint256 punkIndex) external;

  function registerProxy() external;

  function proxyInfo(address user) external returns (address proxy);
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

interface IPunkGateway {
  /**
   * @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
   * already deposited enough collateral
   * - E.g. User borrows 100 USDC, receiving the 100 USDC in his wallet
   *   and lock collateral asset in contract
   * @param reserveAsset The address of the underlying asset to borrow
   * @param amount The amount to be borrowed
   * @param punkIndex The index of the CryptoPunk used as collteral
   * @param onBehalfOf Address of the user who will receive the loan. Should be the address of the borrower itself
   * calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
   * if he has been given credit delegation allowance
   * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
   *   0 if the action is executed directly by the user, without any middle-man
   **/
  function borrow(
    address reserveAsset,
    uint256 amount,
    uint256 punkIndex,
    address onBehalfOf,
    uint16 referralCode
  ) external;

  /**
   * @notice Repays a borrowed `amount` on a specific punk, burning the equivalent loan owned
   * - E.g. User repays 100 USDC, burning loan and receives collateral asset
   * @param punkIndex The index of the CryptoPunk used as collteral
   * @param amount The amount to repay
   * @return The final amount repaid, loan is burned or not
   **/
  function repay(uint256 punkIndex, uint256 amount) external returns (uint256, bool);

  /**
   * @notice auction a unhealth punk loan with ERC20 reserve
   * @param punkIndex The index of the CryptoPunk used as collteral
   * @param bidPrice The bid price
   **/
  function auction(
    uint256 punkIndex,
    uint256 bidPrice,
    address onBehalfOf
  ) external;

  /**
   * @notice redeem a unhealth punk loan with ERC20 reserve
   * @param punkIndex The index of the CryptoPunk used as collteral
   * @param amount The amount to repay the debt and bid fine
   **/
  function redeem(uint256 punkIndex, uint256 amount) external returns (uint256);

  /**
   * @notice liquidate a unhealth punk loan with ERC20 reserve
   * @param punkIndex The index of the CryptoPunk used as collteral
   **/
  function liquidate(uint256 punkIndex, uint256 amount) external returns (uint256);

  /**
   * @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
   * already deposited enough collateral
   * - E.g. User borrows 100 ETH, receiving the 100 ETH in his wallet
   *   and lock collateral asset in contract
   * @param amount The amount to be borrowed
   * @param punkIndex The index of the CryptoPunk to deposit
   * @param onBehalfOf Address of the user who will receive the loan. Should be the address of the borrower itself
   * calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
   * if he has been given credit delegation allowance
   * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
   *   0 if the action is executed directly by the user, without any middle-man
   **/
  function borrowETH(
    uint256 amount,
    uint256 punkIndex,
    address onBehalfOf,
    uint16 referralCode
  ) external;

  /**
   * @notice Repays a borrowed `amount` on a specific punk with native ETH
   * - E.g. User repays 100 ETH, burning loan and receives collateral asset
   * @param punkIndex The index of the CryptoPunk to repay
   * @param amount The amount to repay
   * @return The final amount repaid, loan is burned or not
   **/
  function repayETH(uint256 punkIndex, uint256 amount) external payable returns (uint256, bool);

  /**
   * @notice auction a unhealth punk loan with native ETH
   * @param punkIndex The index of the CryptoPunk to repay
   * @param onBehalfOf Address of the user who will receive the CryptoPunk. Should be the address of the user itself
   * calling the function if he wants to get collateral
   **/
  function auctionETH(uint256 punkIndex, address onBehalfOf) external payable;

  /**
   * @notice liquidate a unhealth punk loan with native ETH
   * @param punkIndex The index of the CryptoPunk to repay
   * @param amount The amount to repay the debt and bid fine
   **/
  function redeemETH(uint256 punkIndex, uint256 amount) external payable returns (uint256);

  /**
   * @notice liquidate a unhealth punk loan with native ETH
   * @param punkIndex The index of the CryptoPunk to repay
   **/
  function liquidateETH(uint256 punkIndex) external payable returns (uint256);
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

library DataTypes {
  struct ReserveData {
    //stores the reserve configuration
    ReserveConfigurationMap configuration;
    //the liquidity index. Expressed in ray
    uint128 liquidityIndex;
    //variable borrow index. Expressed in ray
    uint128 variableBorrowIndex;
    //the current supply rate. Expressed in ray
    uint128 currentLiquidityRate;
    //the current variable borrow rate. Expressed in ray
    uint128 currentVariableBorrowRate;
    uint40 lastUpdateTimestamp;
    //tokens addresses
    address bTokenAddress;
    address debtTokenAddress;
    //address of the interest rate strategy
    address interestRateAddress;
    //the id of the reserve. Represents the position in the list of the active reserves
    uint8 id;
  }

  struct NftData {
    //stores the nft configuration
    NftConfigurationMap configuration;
    //address of the bNFT contract
    address bNftAddress;
    //the id of the nft. Represents the position in the list of the active nfts
    uint8 id;
  }

  struct ReserveConfigurationMap {
    //bit 0-15: LTV
    //bit 16-31: Liq. threshold
    //bit 32-47: Liq. bonus
    //bit 48-55: Decimals
    //bit 56: Reserve is active
    //bit 57: reserve is frozen
    //bit 58: borrowing is enabled
    //bit 59: stable rate borrowing enabled
    //bit 60-63: reserved
    //bit 64-79: reserve factor
    uint256 data;
  }

  struct NftConfigurationMap {
    //bit 0-15: LTV
    //bit 16-31: Liq. threshold
    //bit 32-47: Liq. bonus
    //bit 56: NFT is active
    //bit 57: NFT is frozen
    uint256 data;
  }

  /**
   * @dev Enum describing the current state of a loan
   * State change flow:
   *  Created -> Active -> Repaid
   *                    -> Auction -> Defaulted
   */
  enum LoanState {
    // We need a default that is not 'Created' - this is the zero value
    None,
    // The loan data is stored, but not initiated yet.
    Created,
    // The loan has been initialized, funds have been delivered to the borrower and the collateral is held.
    Active,
    // The loan is in auction, higest price liquidator will got chance to claim it.
    Auction,
    // The loan has been repaid, and the collateral has been returned to the borrower. This is a terminal state.
    Repaid,
    // The loan was delinquent and collateral claimed by the liquidator. This is a terminal state.
    Defaulted
  }

  struct LoanData {
    //the id of the nft loan
    uint256 loanId;
    //the current state of the loan
    LoanState state;
    //address of borrower
    address borrower;
    //address of nft asset token
    address nftAsset;
    //the id of nft token
    uint256 nftTokenId;
    //address of reserve asset token
    address reserveAsset;
    //scaled borrow amount. Expressed in ray
    uint256 scaledAmount;
    //start time of first bid time
    uint256 bidStartTimestamp;
    //bidder address of higest bid
    address bidderAddress;
    //price of higest bid
    uint256 bidPrice;
    //borrow amount of loan
    uint256 bidBorrowAmount;
  }
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

interface IWETHGateway {
  /**
   * @dev deposits WETH into the reserve, using native ETH. A corresponding amount of the overlying asset (bTokens)
   * is minted.
   * @param onBehalfOf address of the user who will receive the bTokens representing the deposit
   * @param referralCode integrators are assigned a referral code and can potentially receive rewards.
   **/
  function depositETH(address onBehalfOf, uint16 referralCode) external payable;

  /**
   * @dev withdraws the WETH _reserves of msg.sender.
   * @param amount amount of bWETH to withdraw and receive native ETH
   * @param to address of the user who will receive native ETH
   */
  function withdrawETH(uint256 amount, address to) external;

  /**
   * @dev borrow WETH, unwraps to ETH and send both the ETH and DebtTokens to msg.sender, via `approveDelegation` and onBehalf argument in `LendPool.borrow`.
   * @param amount the amount of ETH to borrow
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   * @param onBehalfOf Address of the user who will receive the loan. Should be the address of the borrower itself
   * calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
   * if he has been given credit delegation allowance
   * @param referralCode integrators are assigned a referral code and can potentially receive rewards
   */
  function borrowETH(
    uint256 amount,
    address nftAsset,
    uint256 nftTokenId,
    address onBehalfOf,
    uint16 referralCode
  ) external;

  /**
   * @dev repays a borrow on the WETH reserve, for the specified amount (or for the whole amount, if uint256(-1) is specified).
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   * @param amount the amount to repay, or uint256(-1) if the user wants to repay everything
   */
  function repayETH(
    address nftAsset,
    uint256 nftTokenId,
    uint256 amount
  ) external payable returns (uint256, bool);

  /**
   * @dev auction a borrow on the WETH reserve
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   * @param onBehalfOf Address of the user who will receive the underlying NFT used as collateral.
   * Should be the address of the borrower itself calling the function if he wants to borrow against his own collateral.
   */
  function auctionETH(
    address nftAsset,
    uint256 nftTokenId,
    address onBehalfOf
  ) external payable;

  /**
   * @dev redeems a borrow on the WETH reserve
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   * @param amount The amount to repay the debt and bid fine
   */
  function redeemETH(
    address nftAsset,
    uint256 nftTokenId,
    uint256 amount
  ) external payable returns (uint256);

  /**
   * @dev liquidates a borrow on the WETH reserve
   * @param nftAsset The address of the underlying NFT used as collateral
   * @param nftTokenId The token ID of the underlying NFT used as collateral
   */
  function liquidateETH(address nftAsset, uint256 nftTokenId) external payable returns (uint256);
}

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.4;

import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import {IERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import {IERC721Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol";

import {IPunks} from "../interfaces/IPunks.sol";

/**
 * @title EmergencyTokenRecovery
 * @notice Add Emergency Recovery Logic to contract implementation
 * @author Bend
 **/
abstract contract EmergencyTokenRecoveryUpgradeable is OwnableUpgradeable {
  event EmergencyEtherTransfer(address indexed to, uint256 amount);

  function __EmergencyTokenRecovery_init() internal onlyInitializing {
    __Ownable_init();
  }

  /**
   * @dev transfer ERC20 from the utility contract, for ERC20 recovery in case of stuck tokens due
   * direct transfers to the contract address.
   * @param token token to transfer
   * @param to recipient of the transfer
   * @param amount amount to send
   */
  function emergencyERC20Transfer(
    address token,
    address to,
    uint256 amount
  ) external onlyOwner {
    IERC20Upgradeable(token).transfer(to, amount);
  }

  /**
   * @dev transfer ERC721 from the utility contract, for ERC721 recovery in case of stuck tokens due
   * direct transfers to the contract address.
   * @param token token to transfer
   * @param to recipient of the transfer
   * @param id token id to send
   */
  function emergencyERC721Transfer(
    address token,
    address to,
    uint256 id
  ) external onlyOwner {
    IERC721Upgradeable(token).safeTransferFrom(address(this), to, id);
  }

  /**
   * @dev transfer CryptoPunks from the utility contract, for punks recovery in case of stuck punks
   * due direct transfers to the contract address.
   * @param to recipient of the transfer
   * @param index punk index to send
   */
  function emergencyPunksTransfer(
    address punks,
    address to,
    uint256 index
  ) external onlyOwner {
    IPunks(punks).transferPunk(to, index);
  }

  /**
   * @dev transfer native Ether from the utility contract, for native Ether recovery in case of stuck Ether
   * due selfdestructs or transfer ether to pre-computated contract address before deployment.
   * @param to recipient of the transfer
   * @param amount amount to send
   */
  function emergencyEtherTransfer(address to, uint256 amount) external onlyOwner {
    (bool success, ) = to.call{value: amount}(new bytes(0));
    require(success, "ETH_TRANSFER_FAILED");
    emit EmergencyEtherTransfer(to, amount);
  }

  uint256[50] private __gap;
}

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

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

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

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    uint256[50] private __gap;
}

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

pragma solidity ^0.8.0;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

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

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
        // contract may have been reentered.
        require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

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

    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

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

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                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/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 IERC165Upgradeable {
    /**
     * @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 v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721ReceiverUpgradeable {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

// 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);
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyEtherTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"uint256","name":"bidPrice","type":"uint256"},{"internalType":"address","name":"onBehalfOf","type":"address"}],"name":"auction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"address","name":"onBehalfOf","type":"address"}],"name":"auctionETH","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"}],"name":"authorizeLendPoolERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"reserveAsset","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"address","name":"onBehalfOf","type":"address"},{"internalType":"uint16","name":"referralCode","type":"uint16"}],"name":"borrow","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"address","name":"onBehalfOf","type":"address"},{"internalType":"uint16","name":"referralCode","type":"uint16"}],"name":"borrowETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"emergencyERC20Transfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"}],"name":"emergencyERC721Transfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"emergencyEtherTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"punks","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"emergencyPunksTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addressProvider","type":"address"},{"internalType":"address","name":"wethGateway","type":"address"},{"internalType":"address","name":"_punks","type":"address"},{"internalType":"address","name":"_wrappedPunks","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"liquidate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"punkIndex","type":"uint256"}],"name":"liquidateETH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxy","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"punks","outputs":[{"internalType":"contract IPunks","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"redeem","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"redeemETH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"repay","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"punkIndex","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"repayETH","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wrappedPunks","outputs":[{"internalType":"contract IWrappedPunks","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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